238 results about "Tripping" patented technology

A circuit breaker relates to the technical field of low-voltage electrical appliances and comprises a shell, a handle, an operating mechanism and a contact mechanism, the shell is provided with a first rotating shaft and a second rotating shaft, the operating mechanism is mounted on the first rotating shaft and comprises a mechanism seat, a jump fastener and a lock fastener, the contact mechanism comprises a moving contact and a static contact, the moving contact is mounted on the second rotating shaft, and the static contact is mounted on the second rotating shaft. The handle and the jump fastener are connected through a first connecting rod. The jump fastener and the moving contact are connected through a second connecting rod. During normal switching-on or switching-off operation, the locking fastener is buckled with the tripping fastener, and the handle is driven to drive the mechanism seat to rotate around the first rotating shaft through the first connecting rod, so that the moving contact is driven to be close to or far away from the static contact through the tripping fastener and the second connecting rod; when a fault is tripped, the locking piece and the tripping piece are tripped, and the moving contact is driven to rotate around the second rotating shaft so as to be far away from the static contact. According to the circuit breaker, the operating mechanism and the moving contact are respectively arranged on different rotating shafts, and the motion decoupling of the operating mechanism and the moving contact is realized during fault tripping, so that the moving contact can be quickly broken.

The technical scheme belongs to the technical field of circuit breakers, and particularly relates to a button tripping structure of a circuit breaker, which comprises a shell, a short-circuiting device, a tripper and a testing mechanism, the testing mechanism forms a loop to attract an armature after being electrified, the tripping structure is arranged in the shell and is linked with the testing mechanism, and the button tripping structure comprises a reset button, a linkage rod, an elastic piece and the armature. The reset button slides at a button opening in the side wall of the shell and is provided with a clamping part; the other end of the linkage rod penetrates through the through hole of the shell and is connected with the short-circuiting device; the elastic piece abuts against the reset button and the inner wall of the shell, so that the reset button tends to move towards the linkage rod, the armature is hinged to the interior of the shell, a lock catch protrusion is arranged and can be switched between a first position and a second position around a shaft, at the beginning, the armature is opened at the first position, and a clamping part of the lock catch protrusion limits the reset button. When the circuit breaker is released, the lock catch protrusion is released from the clamping portion, the elastic piece pushes the reset button to slide to the button opening, the linkage rod moves along with the reset button to release the circuit breaker, and releasing is smooth and efficient.

The invention relates to a ground simulation device for testing an underground logging pup joint, which comprises a logging pup joint and a leak-off ring which are arranged in a kettle body, the logging pup joint is positioned in the leak-off ring, the kettle body is connected with a slurry injection unit, and the slurry injection unit is used for injecting slurry into a space in the leak-off ring and a space outside the leak-off ring. The slurry injection unit is also used for injecting pressure into the leak-off ring, so that the slurry in the leak-off ring is filtered into a mud cake; electromagnets and force measuring sensors are arranged on the left side and the right side of the kettle body, the electromagnets are used for providing suction force for the well logging short section, and the force measuring sensors are used for measuring the suction force of the corresponding electromagnets; the lower end of the kettle body is connected with a vertical force applying unit, and the vertical force applying unit is used for injecting a jam releasing force in the vertical direction to the lower end of the kettle body so as to research the relationship between the jam releasing force and the suction force. Potential hazards possibly caused by testing of the well logging short section in an actual well are greatly avoided, and manpower, material resources and time cost are saved to a great extent.

The invention discloses a quick tripping drilling machine and a tripping and tripping method thereof. The drilling machine comprises a site multifunctional device which is arranged on the front ground and used for turning a drilling tool into a horizontal state or a vertical state; the power drill rod box is arranged on at least one side of the site multifunctional device and used for conveying drilling tools to the site multifunctional device or receiving the drilling tools from the site multifunctional device. The base is arranged on the ground on the rear side of the site multifunctional device, the base is provided with a power slip used for clamping a drilling tool in the center of a well mouth, an iron roughneck used for screwing on and screwing off at the position of the well mouth and a derrick, a top drive is arranged in the derrick, a power elevator is hung on the lower portion of the top drive, and a pushing manipulator is arranged on the middle rear portion of the derrick. By means of flexible configuration and collaborative operation of the ground site multifunctional device and the power drill rod box, the three-joint unit does not need to be stored on a table top in the tripping operation process, and operation is directly conducted between the drill rod box and a well mouth.

A method for tripping out of an underbalanced well, the method comprising: determining the drilling fluid balance density and the annular pressure loss outside the drill pipe; determining the time for oil and gas to surge to the wellhead and the tripping time to the depth of the first injected gas plug, and comparing them to determine whether the conditions for safe operation are met; if the conditions for safe operation are met, determining the density and volume of the first gas plug based on the drilling fluid balance density and the annular pressure loss outside the drill pipe; tripping out of the well based on the density and volume of the first gas plug, completing the tripping out of the first gas plug; determining the density and volume of the gas plug at the depth near the wellhead using a preset method based on the depth after the tripping out of the first gas plug; and completing the tripping out of the gas plug near the wellhead based on the determined density and volume of the gas plug at the depth near the wellhead.

The invention relates to the technical field of petroleum drilling downhole tools, and provides a directional drilling tubular column and a well deviation control method thereof. The directional drilling pipe column comprises a drilling tool assembly, a measuring system assembly, a well deviation adjusting pup joint assembly and a bent motor power assembly. The well deviation adjusting method comprises the steps that a control command is received; controlling a power mechanism of the well deviation adjusting pup joint assembly according to the control command so as to adjust the outer diameter of the well deviation adjusting pup joint assembly, so that the directional drilling pipe column is attached to and supported on the well wall; the drilling tool assembly is controlled to apply drilling pressure, the bending motor generates torque and power in the specific direction, and the drill bit drills in the preset direction. The directional drilling pipe column can adjust well deviation, and repeated tripping operation is not needed.

The invention relates to the technical field of circuit breakers, and discloses a high-low voltage circuit breaker propelling mechanism which comprises a switching-off mechanism, a frame assembly is fixedly installed on the inner wall of the switching-off mechanism, a communication assembly is installed on the inner wall of the switching-off mechanism, and an operator pulls a spring reset rod to drive a radian stop block to move. Then a connecting rod is pushed to ascend to drive a balancing weight, a sliding rod, a spring ring and a connecting block to synchronously ascend, the connecting block ascends to push a moving contact on a moving contact supporting piece to be in contact with a static contact to enable current to be connected, when the current is large, a spring ejector rod downwards pushes an L-shaped plate to descend to enable a radian stop block to be separated from a fixing ring again, and at the moment, the connecting rod is pushed to ascend to drive the balancing weight, the sliding rod, the spring ring and the connecting block to synchronously ascend. The spring ring and the balancing weight return, and a larger initial driving force is provided by utilizing the elastic potential energy of the spring of the spring ring and the gravitational acceleration of the balancing weight, so that the moving contact supporting piece and the static contact can be quickly separated for a larger distance, the duration time of an electric arc is shortened, and the continuous combustion of the electric arc is effectively prevented.

An operating mechanism of a circuit breaker, comprising: a support (1); a rocker arm assembly, a tripping fastener (7), a locking fastener (10), and a refastening piece (9) that are rotatably provided on the support (1), separately; a first crank (14); an energy storage spring (4); a sliding rail (1-0) fixedly arranged relative to the support (1); a sliding block (18); a first connecting rod (16); a second connecting rod (19); a second crank (22) rotatably arranged about a sixth center (6S); a third connecting rod (23); and a third crank (25) rotatably arranged about a seventh center (7S), wherein the third crank (25) is located on one side of the operating mechanism in the horizontal direction of the operating mechanism. Switching between three working states can be achieved without connection to a contact system; moreover, the layout of the contact system can be changed, so as to provide a larger installation space for an arc-extinguishing chamber.

The utility model discloses an electric leakage test detection loop and a release, and belongs to the technical field of low-voltage electric appliances. The electric leakage test detection loop comprises a first connecting piece and a first torsion spring, wherein the first torsion spring is connected with the first connecting piece; a first breakpoint is formed between the second torsional spring and the first connecting piece, and the second torsional spring can abut against the first connecting piece; the first torsional spring and the second connecting piece are second breakpoints, and the first torsional spring can abut against the second connecting piece; one end, deviating from the first connector, of the second torsion spring is connected with the third connector; one end of the second connecting piece away from the first torsion spring is connected with the circuit board. One end of the third connecting piece away from the second torsion spring is connected with the circuit board. The first torsion spring and the second torsion spring are arranged on the outer side of the release shell, so that the space in the release shell is saved, the purpose of reducing the design space of the electric leakage release is achieved, and the dielectric property of a product is improved. And by arranging the two breakpoints, mistaken touch of an operator is avoided, and high stability and reliability are achieved.

The utility model provides a surge protector tripping mechanism, which belongs to the technical field of surge protectors, and comprises a shell, a mounting groove is arranged at the top of the shell, two groups of hook pieces are arranged in the mounting groove, a rotatable tripping piece is arranged between the two groups of hook pieces, the tripping piece can be connected with one group of hook pieces, and the other group of hook pieces can be connected with the other group of hook pieces. The corresponding sides of the two groups of tripping pieces are provided with connecting pieces, one end of one group of connecting pieces is connected with a Hall current detection module, one side of the Hall current detection module is connected with a second output pin, and the second output pin is connected with an external detection load or a grounding wire; through the arrangement of the Hall current detection module, when the mechanism detects that a surge phenomenon is tripped, the tripping piece is connected with the Hall current detection module, and the Hall current detection module continuously captures line state information, so that the problem that a traditional tripping mechanism cannot continuously detect a line during tripping is solved.

The utility model belongs to the technical field of tripping devices, and particularly relates to a thermal relay tripping device, which comprises a shell and a tripping assembly, the tripping assembly is arranged in the shell and comprises a first metal sheet and two second metal sheets with different thermal expansion coefficients, and the first metal sheet and the second metal sheet are arranged in the shell. The two second metal sheets are arranged on the two sides of the first metal sheet respectively, the top end and the bottom end of one side of each second metal sheet are fixedly connected with the top end and the bottom end of one side of the first metal sheet respectively, and connecting assemblies are arranged at the two ends of the tripping assembly respectively. According to the utility model, because the number of the second metal sheets is two, one of the second metal sheets deforms towards the direction close to the clamping hook, and the other second metal sheet deforms towards the direction close to the inner wall of the shell, when the side walls of the second metal sheets are contacted with the inner wall of the shell, the whole tripping assembly is pushed to approach the clamping hook, and the contact speed of the tripping assembly and the clamping hook is further improved; the sensitivity is improved.

The invention relates to the technical field of oil exploration, and provides an analysis method and device for safe tripping-in of a well completion pipe string, and the method comprises the steps: obtaining the actual hook load data and well section information of an open hole section based on a drifting process; constructing a tubular column friction torque calculation model of the drifting drilling tool assembly; on the basis of the tubular column friction resistance torque calculation model, the actual hook load data of the open hole section and the well section information of the well, the well hole open hole section friction resistance coefficient is calibrated; on the basis of well section information and the well hole open hole section friction resistance coefficient, a solving model of the axial force of the well completion pipe string and a critical load value calculation model of well completion pipe string buckling are built; and on the basis of the solving model of the axial force of the well completion pipe string and the calculation model of the critical load value of buckling of the well completion pipe string, whether the well completion pipe string is safely tripped is determined. According to the method, the friction resistance coefficient in the drifting stage is determined, the invisible shaft cleaning state is known, the current friction resistance coefficient is used for evaluating the to-be-tripped well completion pipe string, and therefore operation risks and operation complexity are avoided, and the operation efficiency is improved.

The invention discloses an operating mechanism and a circuit breaker, the operating mechanism comprises a handle, a contact support and a moving contact, the handle is rotatably installed on a base, a connecting rod is also arranged between the handle and the contact, the moving contact is installed on the contact support, a first spring is also arranged between the contact support and the moving contact, and a second spring is also arranged between the contact support and the moving contact. The moving contact is under the action of the spring force of the first spring, and the moving contact is always in contact with the contact support without external force. The circuit breaker further comprises a lock catch, the lock catch is installed on the contact support, a second spring is further installed on the lock catch, the connecting rod makes contact with the lock catch and the contact support through the spring acting force of the second spring, and the lock catch is used for achieving the functions of instantaneous tripping, overload tripping and circuit breaker linkage. Compared with the prior art, the mechanism combines a plurality of parts into one part, the reliability of the circuit breaker is reduced by reducing the parts, the manufacturing cost of part molds is reduced, and the assembly efficiency of the circuit breaker is improved.

The invention is a kind of tripping device fixing device, which comprises a tripping device base and a cover, and a tripping device body is installed on the tripping device base, characterized in that it further comprises a bracket, the bracket is installed on the cover, the front part of the tripping device base is fixed with the bracket, and the rear end of the tripping device base is fixed with the cover through buckling. The invention ensures the fixing reliability of the tripping device by increasing a bracket to cooperate with the tripping device base without increasing the size of the space, reduces the scrap rate of the cover parts, and the bracket also has a wiring function, so that a separate wiring groove is not needed, and the number of parts is reduced.

The invention discloses a winch positioning cruise control method, device and equipment, and relates to the field of data processing.The winch positioning cruise control method comprises the steps that when it is detected that the height of a winch exceeds a preset height threshold value, a measurement starting signal is sent to a visual recognition system; receiving the coupling height fed back; acquiring the height and speed of the winch at the target moment; and determining the final stop height of the winch according to the coupling height, the height of the winch, the speed, the reference stop height and the data transmission delay. Accumulative errors are eliminated through vision measurement, and system delay is overcome through a prediction compensation algorithm. By means of the method, one-time alignment can be achieved, repeated adjustment caused by inaccurate positions is avoided, the operation time of tripping of each stand column is greatly shortened, and the well drilling efficiency is improved. Misoperation is avoided through a condition triggering mechanism; the equipment collision risk is reduced through high-precision positioning; the whole process is automatically completed by the system, and the possibility of manual misoperation is reduced.

At least one embodiment of the present disclosure provides a trip device and a circuit breaker including the trip device. The tripping device comprises a support; a static yoke having a conductor accommodating recess; a conductor extending through the conductor accommodating recess; the moving armature is configured to be attracted by the static magnet yoke to move from a non-tripping position to a tripping position when current exceeding a preset threshold value passes through the conductor; a pull rod fixed to the moving armature; and the tripping rod is provided with a shifting part matched with the pull rod. And at the non-tripping position, the shifting part is separated from the pull rod. And when the moving armature moves from the non-tripping position to the tripping position in the longitudinal direction, the pull rod shifts the shifting part of the tripping rod after moving for an idle stroke, so that the shifting part moves to disconnect the circuit breaker. The tripping device is convenient to install, has a short tripping response time and / or has a low and adjustable tripping threshold value.

The utility model relates to the technical field of release molds, in particular to a mold structure convenient to release, which comprises a mounting block and a demolding component, the demolding component comprises a first ejector rod, a second ejector rod and a release rod, a first process groove matched with the first ejector rod and the second ejector rod is arranged in the middle of the mounting block, and a second process groove matched with the release rod is arranged in the middle of the mounting block. The first process groove extends towards the middle of the mounting block, a second process groove is formed in the bottom face of the mounting block, a protruding block is arranged at the position, close to the first process groove, in the second process groove, an inclined face is arranged on the bottom face of the protruding block, and limiting protrusions are arranged at the lower end of the first ejector rod and the lower end of the second ejector rod correspondingly. And the top surface of the limiting bulge is provided with a binding surface matched with the inclined surface, and due to the matching effect between the binding surface and the inclined surface, during ejection, the first ejection rod and the second ejection rod are subjected to an acting force far away from the convex block, so that the first ejection rod and the second ejection rod are driven to be separated, and the tripping effect is realized.

The embodiment of the invention provides a transformer substation tripping circuit detection method, electronic equipment and a storage medium. The method comprises the steps that according to a topological structure of a tripping circuit of a transformer substation, an equivalent operation circuit model is established when the tripping circuit has a single-point grounding fault, and the equivalent operation circuit model comprises parameters of resistance, inductance and ground capacitance; a complex frequency domain analysis method is adopted to process the equivalent operation circuit model so as to solve a loop current expression, and the loop current expression represents transient characteristics of relay loop current changing along with time when a single-point grounding fault occurs; based on the loop current expression, the damping state of the loop current of the relay is determined, and the damping state comprises an over-damping state, a critical damping state and an under-damping state; and according to the damping state, the relay action current value and the relay response time, identifying whether the tripping loop is maloperation caused by the single-point grounding fault. The method can effectively improve the detection precision of the tripping circuit.

The invention relates to the technical field of circuit breakers, and discloses a residual current protection circuit breaker which comprises a shell, moving contacts and static contacts arranged in the shell, and a tripping mechanism arranged in the shell, the tripping mechanism comprises an electromagnetic tripping coil and a transmission assembly, the moving contacts and the static contacts are arranged in multiple groups, and the transmission assembly is arranged in the shell. The moving contact comprises a connecting part and conductive parts arranged at the two ends of the connecting part, the connecting part is rotationally arranged in the shell, the conductive parts are used for being electrically connected with the static contacts, the static contacts are arranged at the two ends of the moving contact respectively, each connecting part is provided with a rotating column, each rotating column is jointly provided with a connecting rod, the connecting rod is rotationally provided with a driving arm, and the driving arm is arranged on the driving arm. The transmission assembly can drive the driving arm to rotate. The force transmission path is shorter and more direct, the mechanical loss is small, the response speed of the tripping mechanism and the synchronization precision of the action are effectively improved, and the breaking speed of the circuit breaker is accelerated.

The application discloses an air screw drill anti-flying one-way valve, which comprises a valve body and a valve core, a plurality of P-shaped structure annular bends are symmetrically arranged on the valve core and sequentially arranged along the axial direction, the direction characteristics of the P-shaped structure annular bends are utilized to control the flow direction of the gas passing through the valve core, unlike the conventional one-way valve, no movement mechanism is arranged, and no complex structure or movement is needed to control the gas, the one-way conduction of the gas can be realized without input energy, the valve is installed between an air screw motor and a drill string, the valve core blocks the upward return of the gas above the air screw motor, a part of the gas can be reserved in the third chamber, therefore, a certain pressure is maintained above the air screw motor, the flying problem of the air screw, i.e., the sudden increase of the air screw volume and the sudden increase of the motor rotating speed caused by the pressure reduction due to the tripping of the air screw, can be effectively avoided.

The invention relates to an intelligent pressure sensing device for a circuit breaker, and the device can achieve the regular detection of an opening spring, timely discovers the fault and failure of the opening spring, avoids the opening failure of the circuit breaker caused by the failure of the opening spring, is not liable to cause the damage to a circuit detection worker, and especially, is not liable to cause the damage to the circuit detection worker. A relatively sealed environment is formed in the space where the pressure sensor is located, so that the influence of a magnetic field formed by high voltage of the circuit breaker on detection of the pressure sensor is avoided, normal detection of the pressure sensor is not easily influenced, the pressure sensor is not easily influenced by high voltage and high current, inaccurate data detected by the pressure sensor is not easily caused, and the detection accuracy of the circuit breaker is improved. And meanwhile, the control mainboard sends the same data to the processing terminal while sending the detection result to the mobile terminal through the Internet of Things module, and the processing terminal stores and arranges the data, so that electric power maintenance personnel can conveniently carry out maintenance and detection.

The application relates to the technical field of power equipment, in particular to an intelligent power distribution fault isolation execution device, which comprises an incoming line conductive component, an outgoing line conductive component, a pneumatic actuating mechanism and a monitoring control unit. Through cooperation of the monitoring control unit, the pneumatic actuating mechanism, the outgoing line conductive component and the incoming line conductive component, independent monitoring and accurate fault isolation of each power distribution branch are realized, the traditional trunk overall tripping mode is abandoned, single-branch faults are only isolated from fault lines, the remaining branches are continuously powered, mine production interruption and monitoring failure problems are effectively avoided, field power distribution safety and power supply continuity are improved, the defects that the existing mine field power distribution protection equipment adopts a trunk unified tripping protection mode and cannot realize independent monitoring and accurate isolation of branches are solved, and problems of single-branch fault-induced full-line power failure, production interruption and monitoring failure are avoided.

The invention discloses perforating and slotting equipment and method adopting a flexible composite pipe in in-situ leaching mining. The perforating and slotting equipment comprises an underground tool string, wellhead equipment and the flexible continuous pipe arranged in a borehole. The underground tool string comprises a spray gun, an instrument bin and a safety joint which are connected in sequence; the flexible continuous pipe is composed of a structural layer, a fiber woven reinforcing layer, a signal layer, a high-strength polymer tensile layer and the like, has flexible bending capacity, can adapt to a pipeline with certain bending deformation, can flexibly move in a borehole inclined track, combines the performance advantages of materials of different layers, is suitable for pipeline conveying scenes with requirements for flexibility, corrosion resistance and the like, and has a wide application prospect. A common oil pipe is replaced by the flexible continuous pipe, the tedious operation of connecting the oil pipes one by one is avoided, the ground pipeline winch is matched with the pipeline conveyor to achieve automatic continuous lifting of the flexible continuous pipe, automatic operation is achieved, time consumed by manual intervention is shortened, and the operation time is remarkably shortened.

The application discloses a method for determining, processing and preventing mud ball of a PDC drill bit in oil drilling, and comprises the following steps: S1, setting a risk trend of a parameter sign of the drill bit mud ball as A 渐进 , when A 渐进 reaches a corresponding area value, it is determined that the risk of a slight drill bit mud ball, a serious drill bit mud ball or a mud ball sticking occurs downhole; S2, setting a support degree of the drill bit mud ball as K, when K<20%, it is determined that there is no drill bit mud ball, when 20%≤K<55%, it is determined that there is a slight drill bit mud ball, when 55%≤K<85%, it is determined that there is a serious drill bit mud ball, and when K>85%, it is determined that there is a mud ball sticking; S3, after comprehensively considering the two indexes of A 渐进 and K, the degree B j of the drill bit mud ball is determined, wherein B1 is no drill bit mud ball, B2 is a slight drill bit mud ball, B3 is a serious drill bit mud ball, and B4 is a mud ball sticking; when the conclusions of the two determination indexes are inconsistent, the more serious one is processed. The method can accurately determine the mud ball risk downhole, reduce the tripping frequency and shorten the construction period.

This utility model discloses an electrical cable rewinding mechanism, belonging to the field of electrical equipment technology. The electrical cable rewinding mechanism includes a U-shaped base, with a base fixedly connected to the inner wall of the bottom of the U-shaped base. An opening slot is provided on the top of the base, and a winding post is fixedly connected to the bottom of the opening slot. A winding disc is provided above the base, and the winding disc is rotatably connected to the outer periphery of the winding post through a bearing. A coil spring is provided in the opening slot, with the inner end of the coil spring fixedly connected to the outer periphery of the winding post and the outer end of the coil spring fixedly connected to the bottom of the winding disc. It can automatically rewind and unwind cables by using the coil spring in conjunction with the winding post and the winding disc, effectively solving the problems of low efficiency, easy tangling and damage of cables in traditional cable rewinding methods. At the same time, it avoids safety hazards such as tripping caused by disorderly placement of cables, and improves the ease of operation and safety of electrical equipment in frequently moving scenarios.

This utility model discloses a household wall-mounted arc fault protection circuit breaker, including a housing with an assembly space inside. The assembly space houses a contact system, a tripping element, a PCB circuit board, and a handle. The housing also has a wiring port. The tripping element includes a coil frame, a tripping coil, a moving iron core, and a spring. Leads are connected to both ends of the tripping coil, and the two ends of the tripping coil are electrically connected to the PCB circuit board via the leads. A welding shaft is also provided on the coil frame, which is inserted into and welded to the PCB circuit board. The coil frame is welded to the PCB circuit board via the welding shaft to fix the tripping element. Leads extend from both ends of the tripping coil and are welded to the PCB circuit board to form an electrical connection. This method of fixing and separating the electrical connection solves the problem of short product lifespan caused by tripping vibration leading to tripping coil wire breakage during product use.

The invention belongs to the technical field of oil and gas well drilling, and particularly relates to a variable-diameter centralizer, a combined drilling tool and a method. The variable-diameter centralizer is organically composed of a variable-diameter centralizer body, a centralizer variable-diameter centralizing block, a centralizer inner sliding sleeve and a control unit. The combined drilling tool at least comprises a variable-diameter centralizer and further comprises a drill bit, a single-bend screw with a centralizer on a body, an upper drill column and a ground pulse generating device. The combined drilling tool can meet the requirements of different well sections (a vertical well section, an inclined well section and a horizontal section) for the deflecting capacity by adjusting the variable-diameter centralizer, the tripping times are reduced, the drilling cycle is shortened, and the drilling speed increasing effect is achieved. The variable-diameter centralizer has the outer diameter changing in the transverse direction of a pipe column, and when angle increasing is needed, the diameter of the variable-diameter centralizer becomes smaller and is the same as the diameter of a conventional drill rod; when stable-inclination drilling is needed, the outer diameter of the variable-diameter centralizer is increased, and the variable-diameter centralizer becomes a conventional centralizer and is matched with a body centralizer of a screw rod, so that a good stable-inclination effect is achieved.

The application provides a power module and a method for preventing overstep tripping. In the power module, an incoming line switch controls the conduction or shutdown between an input power source and each uninterruptible power supply in at least two uninterruptible power supplies, and a feeder switch controls the conduction or shutdown between the output of each uninterruptible power supply and the output of the power module. Each uninterruptible power supply comprises a main circuit, a bypass circuit and an output switch, wherein the main circuit is provided with a main circuit input switch and a power converter, and the bypass circuit is provided with a bypass input switch. When the output line of the feeder switch is short-circuited, a first controller controls the feeder switch to be turned off, and sends a first fault signal to a second controller. The second controller controls the bypass input switch and the output switch in each uninterruptible power supply to be turned on in response to the first fault signal. Based on the application, the bypass input switch and the output switch in each uninterruptible power supply can be prevented from overstep tripping, thereby improving the power supply reliability of the power module.

The utility model relates to an operating mechanism and an isolating switch, the operating mechanism comprises a rotating shaft, and also comprises a jump fastener, a releasing member, an energy storage elastic member and a remote driver, the jump fastener is sleeved on the rotating shaft, and the jump fastener and the rotating shaft form linkage cooperation of circumferential rotation; the energy storage elastic piece is used for generating elastic deformation and storing energy in the process that the rotating shaft rotates to the closing position to be linked with the tripping piece, and the tripping piece is movably arranged on the outer side of the tripping piece and used for forming springback locking on the tripping piece in the process that the rotating shaft rotates to the closing position to be linked with the tripping piece. And the remote driver is used for driving the tripping piece to move according to a remote control signal, so that the tripping piece relieves the rebound locking of the tripping piece to the jump buckle piece, triggers the jump buckle of the jump buckle piece and is linked with the rotating shaft for opening. According to the utility model, the size and the number of parts of the remote shunt driving mechanism are reduced, so that the remote shunt driving mechanism can respond quickly, and meanwhile, the requirements of reliability and economical efficiency of products are met.

The utility model relates to a tripping device for a frame circuit breaker, which comprises a tripping frame and a placing plate, the tripping frame is arranged on the front side of the placing plate, and a tripping assembly for protecting an electrical device from overload is arranged in the tripping frame. The tripping assembly comprises a detection device, an electric push rod, a first guide plate, a second guide plate, a push plate, a first U-shaped plate, a second U-shaped plate, a connecting plate, a semicircular convex block and a tripping spring, a notch is formed in the front side of the tripping frame, the first U-shaped plate is fixedly installed in the tripping frame, and the second U-shaped plate is fixedly installed in the tripping frame. According to the utility model, the connecting plate can be limited through the arranged tripping assembly, and the connecting plate can be pushed away through the push plate, so that the connection between the first U-shaped plate and the second U-shaped plate is disconnected, and the situation that the contact between the connecting plate and the second U-shaped plate is poor due to the touch connection between the connecting plate and the second U-shaped plate is prevented.