50results about How to "Fast opening and closing speed" patented technology

A biaxial hinge in which a first casing and a second casing of a terminal device can open and close 360 degrees relative to each other, with a simplified structure, enhanced opening and closing speed and an improved operability. A first hinge shaft attached to the second casing via a first attaching plate is rotatable in parallel to a second hinge shaft attached to the first casing via a second attaching plate with help of several joint members. A module for restricting rotation of the first hinge shaft and the second hinge shaft is provided in association with the joint members. The module for restricting rotation includes modules for generating friction torque, modules for sucking, stopper modules for restricting a rotation angle of the first hinge shaft and the second hinge shaft, and a module for synchronously rotating hinge shafts.

A biaxial hinge in which a first casing and a second casing of a terminal device can open and close 360 degrees relative to each other, with a simplified structure, enhanced opening and closing speed and an improved operability. A first hinge shaft attached to the second casing via a first attaching plate is rotatable in parallel to a second hinge shaft attached to the first casing via a second attaching plate with help of several joint members. A module for restricting rotation of the first hinge shaft and the second hinge shaft is provided in association with the joint members. The module for restricting rotation includes modules for generating friction torque, modules for sucking, stopper modules for restricting a rotation angle of the first hinge shaft and the second hinge shaft, and a module for synchronously rotating hinge shafts.

A novel telescopic translation door comprises a first guide rail, a driving door, a motor, a first swing mechanism and a first driven door; the first guide rail is arranged on a fixed base; the driving door is movably arranged on the first guide rail, and provided with a tooth bar; the motor is arranged on the fixed base, and an output shaft of the motor is fixedly provided with a gear wheel; two first tension wheels of the first swing mechanism are respectively pivoted on two ends of a same side of the driving door; a first flexible connector is synchronically sleeved on the two first tension wheels; two ends of a first support are respectively fixed on a first lower segment and the ground; one end of a second support is fixed on a first upper segment; the first driven door is fixed on one end, far away from the first upper segment, of the second support. The novel telescopic translation door can greatly improve a translation door open / close speed, is simple in structure, hard to fail, no cable is needed to be paved between a door body of the driven door and the adjacent driven door, so no cable can be mixed and twisted in a telescopic process, and the cable cannot be damaged.

A switch includes a base, a support terminal assembled in the base, a movable contact piece made of a belt-like electroconductive material bent into a substantial J-shape in section, a plunger vertically movably accommodated in an internal space, and a coil spring turnably supported by the plunger. The movable contact piece includes a movable contact provided in one end portion thereof. An intermediate portion of the movable contact piece is turnably supported by a turning support portion of the support terminal. The internal space is formed by fitting a housing in the base. The plunger is slid while vertically moved press-contact one end portion of the coil spring against the other end edge portion of the movable contact piece such that the movable contact piece is reversed to bring the movable contact into contact with a fixed contact or to separate the movable contact from the fixed contact.

The invention discloses professional dual-power automatic transfer switching equipment. The professional dual-power automatic transfer switching equipment comprises a mounting shell, an operating component is mounted on one side of the mounting shell, monopole components are mounted on one side of the operating component, and an auxiliary contact component is mounted on one side the monopole components. The professional dual-power automatic transfer switching equipment is scientific and reasonable in structure and safe and convenient to use, through the linkage function of the operating component, the monopole components and the auxiliary contact component, completion of switching on a first power source and a second power source is facilitated, the opening and closing speed of contacts isincreased, the rated limited short-circuit current capability is improved, and parameters of the professional dual-power automatic transfer switching equipment are improved; the contacts have no silver point structure, so that the cost of the professional dual-power automatic transfer switching equipment is reduced, and the design of the professional dual-power automatic transfer switching equipment with low cost and high parameters is realized; and the position situation of the internal contacts can be conveniently and clearly seen through the function of inspecting windows, and the use is safer.

An opening and closing device comprises a disc tray, a mounting shaft and a jukebox manipulator. The disc tray is mounted on the mounting shaft. A positioning structure is provided between the disc tray and the mounting shaft. The mounting shaft is mounted on an outer circumference of a jukebox rotating cage. The jukebox manipulator is mounted on a manipulator driving unit. A side of the manipulator driving unit is provided with an optical drive, the jukebox manipulator is provided with a driving plate structure and the disc tray is provided with a driving lever. When the jukebox rotating cage rotates, the disc tray can revolve around the rotating shaft of jukebox rotating cage and can rotate around the mounting shaft. With the assistance of in-place bumping post which is provided by a side of the jukebox rotating cage, the positioning structure can locate the rotation of disc tray at a fixed static angle.

The invention discloses an electromagnetic operating mechanism of a circuit breaker. The electromagnetic operating mechanism comprises a static contact, a moving contact matched with the static contact, and an electromagnetic mechanism capable of operating the moving contact, wherein the electromagnetic mechanism is hinged with a swing arm through a transition connecting piece; the tail end of theswing arm is hinged to the moving contact so as to drive the moving contact to be opened and closed, a clamping hook used for being matched with the transition connecting piece is arranged on the front side of the electromagnetic mechanism, and the clamping hook can be driven by the elastic driving piece so as to be matched with the transition connecting piece to achieve closing locking or opening separation. With the adoption of the structure, the whole operating mechanism not only maintains the characteristics of no power consumption and no voltage short-circuit protection of the original spring mechanism in the closing state, but also has high reliability of the electromagnetic mechanism, overcomes all defects of the two mechanisms, has the best characteristics of the two mechanisms, can prolong the electrical life and the mechanical life by multiple times, and completely meets the technical standard requirements of the state grid for the high-reliability switch.

The invention provides an operating device for a rapid mechanism switch. The device comprises a shell, a transmission rod, an electromagnetic driving mechanism and a permanent-magnet driving mechanism, wherein the electromagnetic driving mechanism and the permanent-magnet driving mechanism are arranged in the shell, the transmission rod penetrates through the shell in a sliding way, a movable contact is arranged at an upper end of the transmission rod, the permanent-magnet driving mechanism is connected with the transmission rod and is used for driving the transmission rod to upwards move so that the movable contact is in contact with a static contact, and the electromagnetic driving mechanism is connected with the transmission rod and is used for driving the transmission rod to downwards move so that the movable contact is separated from the static contact. In the device, the electromagnetic driving mechanism and the permanent-magnet driving device are arranged, thus, the breaking-closing speed can be greatly increased, and the breaking-closing time is shortened; and moreover, the device is simple in structure and is easy to operate.

The invention discloses a long-stroke permanent magnet operating mechanism with a magnetic bridge and an auxiliary weak magnetic coil for a high-voltage vacuum circuit breaker. The mechanism comprises a guide rod connected with a circuit breaker moving contact, a permanent magnet holding mechanism, an electromagnetic driving mechanism, and a non-magnetic material gasket. The permanent magnet holding mechanism comprises an upper magnetic bridge, a switching-on static iron core, a switching-on moving iron core, a switching-on permanent magnet, an upper auxiliary weak magnetic coil, a switching-off static iron core, a switching-off permanent magnet, a lower auxiliary weak magnetic coil, a lower magnetic bridge, and a holding moving iron core. The electromagnetic driving mechanism comprises a switching-on coil, a switching-off coil, a driving static iron core, and a driving moving iron core. The mechanism can reduce the absorption force of the permanent magnet for the holding moving iron core at the switching-off and switching-off starting stages and the absorption force of the permanent magnet for the holding moving iron core at the switching-off and switching-off ending stages, and achieves the starting acceleration and ending deceleration of the moving iron core. Meanwhile, the mechanism is enabled to counteract a part of holding forces of the switching-off permanent magnet and the switching-on permanent magnet at the switching-off and switching-off starting stages through the auxiliary coils, and shortens the switching-off and switching-off starting time.

A switch includes a base, a support terminal assembled in the base, a movable contact piece made of a belt-like electroconductive material bent into a substantial J-shape in section, a plunger vertically movably accommodated in an internal space, and a coil spring turnably supported by the plunger. The movable contact piece includes a movable contact provided in one end portion thereof An intermediate portion of the movable contact piece is turnably supported by a turning support portion of the support terminal. The internal space is formed by fitting a housing in the base. The plunger is slid while vertically moved press-contact one end portion of the coil spring against the other end edge portion of the movable contact piece such that the movable contact piece is reversed to bring the movable contact into contact with a fixed contact or to separate the movable contact from the fixed contact.

A mechanical prosthetic heart valve having a ring, multiple hinges, and multiple leaflets. The hinges are attached to the ring and are evenly spaced from one another along the inner circumference of the ring. Each leaflet is rotably attached to a hinge by an opening located in the center of the lower portion of the leaflets. The ring can include multiple protrusions located along the inner circumference of the ring. The protrusions of the ring limit the opening angle of the leaflets. By limiting the opening angle of the leaflets, wear and tear of the hinges and leaflets, as well as the probability of malfunction of the mechanical prosthetic heart valve are reduced. In addition, limiting the opening angle of the leaflets may increase the opening and closing speed of the leaflets, thus improving performance of the mechanical prosthetic heart valve when the patient is experiencing an elevated cardiac frequency.

The invention discloses a low-voltage capacitor intelligent synchronous zero passage switch which comprises a synchronous zero passage detection control unit and a low-voltage vacuum contactor. A single chip microcomputer is taken as a core, a sampling loop and reasonable program design are supplemented, the problem that in the process of low-voltage capacitor switching, high-voltage harmonic waves and inrush currents occur is solved, and safety and reliability of a capacitor switching switch are improved. The low-voltage capacitor intelligent synchronous zero passage switch is low in manufacturing cost, simple and durable in structure and little in power dissipation.

A mechanical prosthetic heart valve having a ring, multiple hinges, and multiple leaflets. The hinges are attached to the ring and are evenly spaced from one another along the inner circumference of the ring. Each leaflet is rotably attached to a hinge by an opening located in the center of the lower portion of the leaflets. The ring can include multiple protrusions located along the inner circumference of the ring. The protrusions of the ring limit the opening angle of the leaflets. By limiting the opening angle of the leaflets, wear and tear of the hinges and leaflets, as well as the probability of malfunction of the mechanical prosthetic heart valve are reduced. In addition, limiting the opening angle of the leaflets may increase the opening and closing speed of the leaflets, thus improving performance of the mechanical prosthetic heart valve when the patient is experiencing an elevated cardiac frequency.

The invention relates to a high-voltage switch and a double-acting transmission system thereof. The high-voltage switch includes a double-acting transmission system. The double-acting transmission system includes a first pull rod and a second pull rod. The second pull rod is a power input rod in transmission connection with an operating mechanism. The opposite ends of the first pull rod and the second pull rod are respectively connected with a first contact and a second contact. The first pull rod and the second pull rod are in transmission connection through a transmission structure. The transmission structure includes a fixed frame, a crank arm of which the middle is hinged to the fixed frame, a first connecting rod of which the two ends are respectively hinged to the inner end of the crank arm and the first pull rod, and a second connecting rod of which the two ends are respectively hinged to the outer end of the crank arm and the second pull rod. When the second pull rod of the double-acting transmission system moves in a direction under a push / pull force, the second pull rod is driven by the transmission structure to move in an opposite direction. The first pull rod and the second pull rod respectively drive the contacts connected therewith to move in opposite directions for opening or closing. Through simultaneous movement of the two contacts, the opening / closing speed ofthe high-voltage switch is greatly increased.

The invention discloses a large-capacity circuit breaker. The large-capacity circuit breaker comprises a plurality of movable contact units, a contact supporting mechanism and an operation connecting rod, wherein each movable contact unit comprises a conductive plate, a flexible connector, movable contacts and an arc main contact which are sequentially connected to one another; the contact supporting mechanism comprises a long magnet yoke plate; three connecting racks sleeve the long magnet yoke plate, namely, the three connecting racks are respectively arranged on a left phase rod, a middle phase rod and a right phase rod of the long magnet yoke plate correspondingly in a penetrating manner; an insulating rack is inserted in each connecting rack; the fronts of bottom plates of the insulating racks are tightly pressed on the long magnet yoke plate; the flexible connector of each movable contact unit is correspondingly clamped in the corresponding insulating rack; and the movable contacts of each movable contact unit are strung together through a corresponding short magnet yoke rod. The large-capacity circuit breaker is simple and reliable in structure and high in work efficiency.

The invention relates to the technical field of intelligent robots, and discloses a segmentation cutting device for a riverway water plant collecting robot. The device comprises a base plate. An extension frame is welded to the right side of the base plate. A rotating shaft is welded to the inner side of a compressing frame, two blades are rotationally arranged at the outer side of the rotating shaft, adjusting rods are hinged to the front faces and the back faces of the blades respectively, and an installing frame is welded to the bottom of the base plate. According to the segmentation cutting device for the riverway water plant collecting robot, by installing the blades in the front of the base plate, when the collecting robot collects water plants inside a riverway, flowing water drivesa turbine to rotate, the turbine drives a rotating wheel to rotate by adjusting a connecting rod and an adjusting wheel, a rotating wheel controls a rotating rod to circularly swing through an annular groove, due to the lever principle, the rotating rod is adopted as a lever, the installing frame is adopted as a pivot, an adjusting rod is driven to move up and down, as shown in the figure 1-2, the blades are opened and closed constantly, staggered and wound water plant rhizomes are cut off, and the water plants are convenient to collect.

The invention discloses an intelligent fire hydrant monitoring valve and solves the problem that the water pressure of a tap water pipeline network cannot be monitored in real time at present. The intelligent fire hydrant monitoring valve comprises a fire-hose quick connector, a water outlet flange, a wafer type butterfly valve and a fire hydrant connecting flange which are sequentially connected from top to bottom, wherein the fire-hose quick connector is in threaded connection with the water outlet flange; the fire hydrant connecting flange comprises a cylinder, a disk and a connecting pipe; the cylinder is of a hollow structure; the disk is arranged above the cylinder and is connected with the water outlet flange; the connecting pipe is arranged below the cylinder and is used for being connected with a fire hydrant; the cylinder, the disk and the connecting pipe are coaxial; a water pressure sensor which is used for detecting the water pressure in the cylinder is also arranged at the side edge of the cylinder. By the arrangement of the fire hydrant connecting flange, a water pressure detection environment is provided, and the water pressure can be detected in real time, so that the current water pressure situation can be clearly mastered, a fireman judges whether the current water pressure can meet the fire extinguishing requirement, and therefore a water using scheme is quickly adjusted.

The invention discloses a brake switch-off and switch-on controller of a high voltage alternating-current circuit breaker. The controller comprises an operating power source, a brake switch-on control interface circuit, a brake switch-off control interface circuit, a brake switch-on control operating part, a brake switch-off operating part, a safety brake switch-on circuit, a brake switch-on coil, a brake switch-off coil, a brake switch-on control outlet device and a brake switch-off control outlet device, wherein the brake switch-on operating part is connected with the brake switch-on control interface circuit, the brake switch-on control interface circuit is connected with the control end of the brake switch-on control outlet device, the brake switch-off operating part is connected with the brake switch-off control interface circuit, and the brake switch-off control interface circuit is connected with the control end of the brake switch-off control outlet device. The brake switch-off and switch-on controller of the high voltage alternating-current circuit breaker is simple in structure, reliable in operation and low in cost. The brake switch-off and switch-on controller of the high voltage alternating-current circuit breaker is high in brake switch-off and switch-on speed, the brake switch-off speed is smaller than or equal to 15 ms, the brake switch-on speed is smaller than or equal to 35 ms, and the brake switch-off time and the brake switch-on time of the circuit breaker are effectively shortened.

The invention discloses a manual opening and closing device of a ring main unit. A closing force is applied to the transmission assembly through the driving structure to push the closing push rod to move, abutting against and pushing the driving bulge to drive the main shaft crank arm to rotate forwards through one end of a driving chute is carried out, and thus, closing rotation of the main shaftis realized; the driving structure does not apply force to the closing push rod any more after the main shaft rotates to the closing position, the closing push rod is reset and moves to an initial position under the action of the elastic reset structure, moving away from the driving bulge through one end of the driving chute is carried out, the main shaft crank arm is not driven to rotate, a section of idle stroke required by opening rotation of the main shaft is formed between the driving chute and the driving bulge again, the transmission assembly is automatically separated from the main shaft after closing, so that the transmission assembly does not interfere with electric opening and closing or manual opening rotation of the main shaft, the opening speed of the main shaft is increased, and the opening and closing time requirement specified by the state grid is met.

The invention relates to the field of low-voltage electric appliances, in particular to an energy storage operating mechanism of a load circuit breaker, which comprises a mechanism bracket, a handle assembly, an energy storage spring, a transmission connecting rod, a linkage rod and a first driving shaft, one end of the handle assembly is operated by a user and connected with one end of the energystorage spring, and the other end is arranged on the mechanism support in a pivoted mode. One end of the transmission connecting rod is pivotally arranged on the mechanism support, the other end of the transmission connecting rod is connected with the other end of the energy storage spring and one end of the linkage rod through a first driving shaft, and the other end of the linkage rod is in driving connection with a moving contact mechanism of the load circuit breaker. After the handle assembly is shifted to enable the energy storage spring to store energy, the energy storage spring releases energy to drive the transmission connecting rod to rotate through the first driving shaft, and drives the linkage rod to drive the moving contact mechanism to reciprocate at the same time; and according to the energy storage operating mechanism, the switching-on and switching-off speed of the load circuit breaker switch is increased. The invention further provides a load circuit breaker comprising the energy storage operating mechanism. The load circuit breaker is high in switching-on and switching-off speed.

The invention discloses a breaking-closing coil control circuit of a long-stroke permanent magnetic mechanism. The breaking-closing coil control circuit solves the problems of great starting current, low breaking speed and great closing jumping and breaking rebounding of the existing permanent magnetic mechanism in a long stroke. A breaking-closing winding uses a multi-coil structure, so that the long-stroke movement of an iron core can be realized; the stroke requirements of an ultra-high-voltage or extra-high voltage circuit breaker can be met; according to speed feature requirements of the high-voltage circuit breaker in different stages of a moving process, different windings are respectively conducted; on one hand, the excitation current of a coil of the permanent magnetic mechanism, particularly the starting current is reduced, the starting electromagnetic force of the permanent magnetic mechanism is improved, and high acceleration is generated; on the other hand, the speed in a final breaking-closing stage is reduced through regulating winding current; the closing jumping and the breaking rebounding are reduced; the breaking-closing speed of a switch contact can be better controlled, so that a control system can be more easily realized, and the reliability is higher.

A large-flow type pneumatic shut-off directional valve comprises a valve seat, an upper valve body and a lower valve body. A feed inlet for allowing a liquid media to flow in is formed in one side of the upper valve body, and a discharge outlet for allowing the liquid media to flow out is formed in one side of the lower valve body. The valve seat, the upper valve body and the lower valve body are connected in sequence and communicate with one another. A valve rod penetrating through the upper valve body and extending into the lower valve body is arranged in the valve seat. The end, located in the lower valve body, of the valve rod is provided with a lower-end valve clack for sealing the discharge outlet. The end, facing the valve seat, of the lower-end valve clack is the obverse side, and the section, away from the valve seat, of the lower-end valve clack is the reverse side. The other end of the valve rod extends out of the valve seat and is provided with a pneumatic assembly for driving the valve rod to move. The lower-end valve clack is provided with a first filtering hole enabling the obverse side and the reverse side to communicate, and further provided with a filtering hole sealing device for controlling the first filtering hole to be through. The filtering hole sealing device comprises a rotary lower-end valve clack corresponding to the first filtering hole in position, and a locking mechanism for controlling the rotary lower-end valve clack to rotate.

The invention relates to a circuit breaker and its arc extinguishing chamber, its arc contact assembly and arc contact transmission rod. The arc contact transmission rod includes a shift fork and an arc contact for driving the The rod body between the heads, the rod body is provided with a long drive slot for pushing and matching with the push post on the shift fork. The driving groove segment corresponding to the moving stroke has a chute segment inclined to the extending direction of the rod body so that the two ends of the driving groove segment are staggered in the extending direction of the rod body. The two ends of the driving groove section provided by the present invention are arranged staggered in the up and down direction, and the relative movement between the pushing boss and the driving long groove in the up and down direction can be used to effectively improve the moving speed of the arc contact assembly and shorten the The closing time shortens the insulation establishment time and improves the breaking capacity.

A large-flow type pneumatic shut-off directional valve comprises a valve seat, an upper valve body and a lower valve body. A feed inlet for allowing a liquid media to flow in is formed in one side of the upper valve body, and a discharge outlet for allowing the liquid media to flow out is formed in one side of the lower valve body. The valve seat, the upper valve body and the lower valve body are connected in sequence and communicate with one another. A valve rod penetrating through the upper valve body and extending into the lower valve body is arranged in the valve seat. The end, located in the lower valve body, of the valve rod is provided with a lower-end valve clack for sealing the discharge outlet. The end, facing the valve seat, of the lower-end valve clack is the obverse side, and the section, away from the valve seat, of the lower-end valve clack is the reverse side. The other end of the valve rod extends out of the valve seat and is provided with a pneumatic assembly for driving the valve rod to move. The lower-end valve clack is provided with a first filtering hole enabling the obverse side and the reverse side to communicate, and further provided with a filtering hole sealing device for controlling the first filtering hole to be through. The filtering hole sealing device comprises a rotary lower-end valve clack corresponding to the first filtering hole in position, and a locking mechanism for controlling the rotary lower-end valve clack to rotate.

The invention relates to a rotation movable bridge based on a lifting tower rack. The movable bridge comprises a base, a fixed bridge body is connected with the base through support pillars, a movable bridge body is arranged on one end of the fixed bridge body; the bottom surface of the movable bridge is connected with a hinge seat and a movable bridge lifter, the flexible end of the movable bridge lifter is connected with the bottom surface of the movable bridge body; the other end of the fixed bridge body is provided with a movable tower rack, the top of the movable tower rack is provided with tower rack pulleys, a motor is further arranged on the end of the movable tower rack farther from the movable bridge body; the movable tower rack can make rotations around a pivot of the rack bottom; the movable bridge body is connected with several traction steel cables, the other ends of the steel cables are connected with the motor, and the steel cables are in slide fit with the tower rack pulleys. The rotation movable bridge based on the lifting tower rack is clear in force structure and beautiful in structure, when the movable bridge is lifted by the movable bridge lifter, the concrete base is under compression, and the compression resistance of the concrete is well utilized. Hydraulic hoist is adopted by the movable bridge for control, the operation is reliable. And the speed of opening and closing is high, the rhythm is smooth, the smoothness of airway traffic is guaranteed.

An intelligent magnetic control low-voltage switch device comprises a magnetic control type primary module and a blade type secondary module. The magnetic control type primary module comprises a first bottom shell, a first top shell, a plastic shell baffle plate and a bottom flitch plate, and the first bottom shell, the first top shell, the plastic shell baffle plate and the bottom flitch plate form a whole shell frame; automatic opening and closing can be achieved under the size requirement of an original manual molded case circuit breaker, an existing old switch in a transformer area is directly replaced, the opening and closing speed is greatly increased, the mechanical performance is improved, the space capacity of a secondary control module is effectively increased, high intelligence, primary and secondary overall modular design and secondary module heat insulation design are achieved, and the cost is reduced. The secondary control module can be plugged, the secondary module can be replaced without power cut, the operation and maintenance capability of the product is improved, the service life of the primary module and the secondary module is the same, the service life of the device is greatly prolonged, secondary vulnerable components can be plugged independently, the flexibility of the device is improved, and high scientificity and logicality are achieved.

A mechanical emergency starting device of a contactor comprises a bottom plate, a first support and an opening and closing mechanism, the first support and the opening and closing mechanism are arranged on the bottom plate, a partition plate is arranged in the first support, the opening and closing mechanism is located below the partition plate, and a linkage mechanism for driving the opening and closing mechanism to be opened or closed is arranged on the partition plate. The device is characterized in that the linkage mechanism comprises a frame, a handle shaft and a linkage rod, the handle shaft is movably arranged on the first support in a penetrating mode, the linkage rod is movably arranged on the partition plate in a penetrating mode, the linkage rod is aligned with the opening and closing mechanism, a sliding block is arranged on the bottom face of the frame in a penetrating mode and can move left and right on the frame, and the handle shaft can be rotated to drive the sliding block to move left and right. The sliding block moves left and right to drive the linkage rod to move up and down. The mechanical emergency starting device of the contactor is stable and reliable in structure, higher in opening and closing speed, higher in applicability and convenient to link.

The invention discloses professional dual-power automatic transfer switching equipment. The professional dual-power automatic transfer switching equipment comprises a mounting shell, an operating component is mounted on one side of the mounting shell, monopole components are mounted on one side of the operating component, and an auxiliary contact component is mounted on one side the monopole components. The professional dual-power automatic transfer switching equipment is scientific and reasonable in structure and safe and convenient to use, through the linkage function of the operating component, the monopole components and the auxiliary contact component, completion of switching on a first power source and a second power source is facilitated, the opening and closing speed of contacts isincreased, the rated limited short-circuit current capability is improved, and parameters of the professional dual-power automatic transfer switching equipment are improved; the contacts have no silver point structure, so that the cost of the professional dual-power automatic transfer switching equipment is reduced, and the design of the professional dual-power automatic transfer switching equipment with low cost and high parameters is realized; and the position situation of the internal contacts can be conveniently and clearly seen through the function of inspecting windows, and the use is safer.

The invention relates to the field of anti-falling flowerpots, in particular to an anti-falling flowerpot convenient to use in high-rise buildings. The anti-falling flowerpot comprises a fixing mechanism, a shielding mechanism, a sealing mechanism, a limiting mechanism, a filtering mechanism and a mounting mechanism; a plurality of flowerpots can be fixed to a handrail of a balcony through the fixing mechanism, and the flowerpots can be fixed into the fixing mechanism one by one through the mounting mechanism, so that mounting and dismounting are easy, and a user can conveniently and freely match different flowers and plants in the later period; flower plants can be conveniently placed into the flowerpots through the shielding mechanism, so that the using safety of the flowerpot is improved; a nutrient solution adding opening can be sealed through the arrangement of the sealing mechanism, so that the situation that the quality of a nutrient box is affected due to the fact that the nutrient box makes contact with air for a long time is avoided; the sealing mechanism is conveniently opened through the arrangement of the limiting mechanism, so that the opening and closing speed and the using effect of the sealing mechanism are improved; and through the arrangement of the filtering mechanism, an added nutrient solution is filtered, and normal growth of the flower plants is guaranteed.