356 results about "Ground plate" patented technology

The invention relates to the technical field of electric power operation and maintenance, in particular to an assembly type grounding device for electric power operation and maintenance, which comprises a grounding plate arranged at the top, a grounding rod arranged at the lower end of the grounding plate and a grounding head arranged at the lower end of the grounding rod, the grounding plate comprises a first flange plate arranged at the upper end, a second flange plate arranged at the lower end and connected with the grounding rod, and a grounding connecting sleeve arranged between the first flange plate and the second flange plate, a conductive sleeve is arranged in the grounding connecting sleeve, and the conductive sleeve is connected with a grounding wire arranged on the side face and a conductive rod arranged at the lower end; the conducting rod is arranged in the middle of the grounding rod and connected with the grounding plate, a grounding box is arranged at the upper end of the first flange plate, and a first motor and a winding assembly are arranged at the upper end of the grounding box in a left-right distribution mode. The assembly type grounding device has the advantages that the grounding part can be prevented from being exposed to cause touch and scratch, the safety is improved, the safety of the assembly type grounding device is guaranteed, and the safety of workers is better guaranteed.

The invention discloses a miniaturized circular patch antenna loaded with four symmetrical L-shaped grooves, and relates to the technical field of wireless communication. The antenna comprises a circular patch, a dielectric substrate, a metal grounding plate and a coaxial line. The circular patch clings to the upper surface of the dielectric substrate, and the metal grounding plate is arranged on the lower surface of the dielectric substrate; four L-shaped grooves are formed in the circular patch, the geometric dimensions of the four L-shaped grooves are the same, and the four L-shaped grooves are symmetrically distributed around the circle center; the circular patch adopts a coaxial line for feeding, the inner conductor is connected to the circular patch, and the outer conductor is connected with the metal grounding plate. The symmetrical L-shaped grooves are etched in the circular patch, so that the resonant frequency of the antenna is effectively reduced, and the electrical size of the antenna is reduced; the antenna keeps relatively high gain and radiation efficiency, and has the advantages of simple structure and excellent performance.

The utility model discloses a submerged arc furnace cover capable of reducing magnetic field interference, which comprises a cover body, a plurality of groups of annularly distributed grounding plates are arranged on the cover body, a mounting frame is arranged on the cover body, a mounting rod is arranged in the mounting frame, a valve plate is sleeved on the mounting rod, the valve plate is movably clamped with the cover body, and the valve plate is connected with the cover body. The mounting rod is sleeved with a compression spring, an adjusting plate is sleeved with the mounting rod, a threaded rod is arranged in the mounting rod, the mounting frame is sleeved with a splash guard, the cover body is sleeved with a cooling water pipe, and the arranged valve plate is matched with the compression spring, the threaded rod and the adjusting rod to achieve overpressure protection of the furnace cover. Safety accidents such as damage to the furnace cover or the furnace body caused by too high pressure in the furnace body are avoided, protection of splashing of furnace charge in the furnace cover is achieved through the arranged splash-proof cover, and the furnace charge is prevented from splashing out to damage equipment or injure workers in the opening process of the valve clack.

The invention provides a GNSS (Global Navigation Satellite System) antenna. The GNSS antenna comprises a grounding plate; the inner ring annular radiator is arranged above the grounding plate, the inner ring annular radiator has a high-frequency working frequency band, and the high-frequency working frequency band ranges from 1560 MHz to 1610 MHz; the outer-ring annular radiator is arranged above the grounding plate, the outer-ring annular radiator and the inner-ring annular radiator are coaxial and are arranged at an interval to form an annular structure, the outer-ring annular radiator has a low-frequency working frequency band, and the low-frequency working frequency band is 1160-1300MHz; the inner ring annular radiator and the outer ring annular radiator are both of a central symmetry structure. The GNSS antenna provided by the invention can realize broadband coverage with a compact and simple structure, and ensures that the GNSS antenna has high gain and good radiation performance in the whole working frequency band.

The utility model provides a compressor grounding assembly which comprises a grounding box, a grounding metal rod is fixedly installed in the grounding box, a ceramic plate is fixedly installed in the grounding box, a clamping groove is formed in the upper surface of the ceramic plate, a grounding plate is inserted in the clamping groove, and the grounding metal rod is fixedly installed in the grounding box. The upper surface of the grounding plate is provided with a through jack, and the interior of the jack is inserted into the top of the grounding metal rod. According to the utility model, one end of the grounding metal rod is provided with the grounding box and the ceramic plate, and the grounding plate and the nuts are fixed on the grounding metal rod and the ceramic plate, so that eight O-shaped grounding wires can be installed on the grounding box, and compressors in the same area can be connected to the same grounding box in a centralized manner; the grounding metal rod is simple to construct and install, centralized grounding is beneficial to later inspection and maintenance, the management capability of multiple groups of grounding wires is improved, and the labor intensity of maintenance is reduced.

To provide a positioning jig for a ground plate reference line which facilitates work to draw a reference line for satisfying standard installation specifications by simultaneously adding the reference line to a plurality of ground plates.SOLUTION: A positioning jig 1 comprises a placement table 2 including a placement board 3 including a placement surface 3a and sidewalls 4 and 5 which are erected on the placement surface 3a. The placement board 3 includes an upper edge 3b, a lower edge 3c in parallel with the upper edge 3b, and rod bodies 6 and 7 which are inserted through installation holes 55 and 56 a ground plate 50 includes. The sidewalls 4 and 5 include inner wall surfaces 4a and 5a to which side end faces 53 and 54 of the ground plate 50 are abutted, and sidewall lower edges 4b and 5b forming the same plane with the lower edge 3c of the placement board 3. In a case where an upper end face 51 of the ground plate 50 matches the upper edge 3b of the placement board 3, both end points La and Lb of a reference line are present on straight lines L1 and L1 which match the sidewall lower edges 4b and 5b.SELECTED DRAWING: Figure 4

The utility model relates to the technical field of communication antennas, in particular to an airborne arc conformal antenna, which comprises a radiant panel, a dielectric plate, a grounding plate, a short circuit plate and a radio frequency connector, the inner cambered surface of the dielectric plate is connected with the outer cambered surface of the grounding plate, and the outer cambered surface of the dielectric plate is connected with the inner cambered surface of the radiant panel; the radiation plate comprises an upper surface metal layer, a lower surface metal layer and a quarter-wavelength short-circuit structure, the quarter-wavelength short-circuit structure comprises a radiation surface on the upper surface, a short-circuit surface on the lower surface and a feed disc, and the radiation surface and the short-circuit surface as well as the feed disc and the radiation surface are connected through corresponding metalized through holes; the first end of the short-circuit sheet is connected with the short-circuit surface, the second end of the short-circuit sheet is connected to the side face of the dielectric plate and connected with the grounding plate, the radio frequency connector is connected to the inner arc face of the grounding plate, and an inner conductor of the radio frequency connector sequentially penetrates through the grounding plate and the dielectric plate and is connected to the feed disc. According to the utility model, the length of the antenna is shortened, the requirement of small radiation window limitation of an aircraft can be met, and the working bandwidth of the antenna is expanded.

The invention discloses a low-profile broadband circularly polarized antenna for an ultra-wideband positioning system. The low-profile broadband circularly polarized antenna comprises a first dielectric substrate, a grounding plate and a second dielectric substrate, the first dielectric substrate, the grounding plate and the second dielectric substrate are sequentially attached from top to bottom; a plurality of circular metal patches are arranged on the upper surface of the first dielectric substrate to form a metasurface structure; a Z-shaped gap is etched in the grounding plate; the lower surface of the second dielectric substrate is provided with a microstrip feed structure, and the microstrip feed structure comprises a microstrip line, a feed branch with a gradual change structure, and an SMA connector. One end of the microstrip line is connected with the feed branch with the gradual change structure, and the other end is connected with the SMA connector. The circular metal patch is adopted to form the metasurface structure, the rectangular gaps of different sizes are etched in the center of the circular metal patch, the feed branch knot with the gradual change structure is coupled with the Z-shaped gap to excite the metasurface structure to generate circular polarization radiation, and large circular polarization bandwidth and impedance bandwidth are achieved.

The utility model relates to a grounding structure of a ceramic capacitive pressure sensor. The utility model comprises a metal shell which is provided with an annular cavity; the plastic socket comprises a connecting column extending into the annular cavity; the printed circuit board is arranged in the annular cavity; and the grounding insert comprises an annular part and a connecting part, wherein the annular part is respectively propped against the side walls of the annular cavity and the connecting column, and the connecting part extends to the annular part, is partially embedded in the plastic socket and is connected with the printed circuit board. The utility model solves the problems that the ground lug of the ceramic pressure sensor in the prior art is easy to break during assembly and the ground lug is loose and poor in contact after long-time use.

The utility model discloses railway bridge expansion joint cleaning device, including trolley and motor, the middle part of trolley is installed with the mounting seat that can go up and down, and the motor is installed in the top of the supporting plate, and the loading box, supporting plate are located above the trolley ground plate, and the bottom plate is located below the trolley ground plate, and spring a is sleeved on every stand, and the upper end of spring a supports the bottom of supporting plate, and the upside of bottom plate is installed with the horizontal pivot through the bearing seat, and one end of pivot projects to the side of trolley and is installed with the cleaning disc subassembly, and the other end of pivot is connected transmission through the pulley subassembly between the output shaft of motor, and the cleaning disc subassembly includes spline shaft and two discs, and two discs are installed with spline shaft and can adjust the interval, and two discs are connected with several even distribution steel wire ropes between the edge. Utilize the rotation of cleaning disc subassembly to clean the sundries in expansion joint, and the width of cleaning disc subassembly can adjust and adapt to the expansion joint of different width, and the compatibility is good.

The invention relates to the field of dual-frequency circularly polarized antennas, in particular to a dual-frequency circularly polarized antenna based on a thermal protection system and an artificial reflection surface design method. The dual-frequency circularly polarized antenna based on the thermal protection system comprises the thermal protection system 1 and an artificial reflection surface 7, the thermal protection system 1 is a planar double-layer thermal protection sheet body, the thermal protection system 1 covers the dual-frequency circularly polarized antenna 2 to separate the antenna from an external heat source, and the artificial reflection surface 7 replaces a grounding plate of the antenna. And the grounding plate is placed at the bottom of the antenna substrate, is separated from the antenna by a set distance and is used for repairing the damage of the loading thermal protection system and the grounding plate to the antenna circular polarization performance. The antenna grounding plate is replaced by the artificial reflection surface, the performance of the circularly polarized antenna can be effectively improved under the condition that a thermal protection system is not changed, and good balance between the overall electrical performance and the thermal protection performance of the system is achieved.

An electrical connector includes first electric wires, second electric wires, a housing and a ground plate. The first electric wires include first signal lines and first ground lines. The second electric wires include second signal lines and second ground lines. The housing includes first and second holding portions. The ground plate includes a plate main body placed between the first electric wires and the second electric wires. The first holding portion holds each conductor at each tip end portion of the first electric wires, and the second holding portion holds each conductor at each tip end portion of the second electric wires. The ground plate includes a first connector extending toward and connected to each conductor of the first ground lines from the plate main body, and a second connector extending toward and connected to each conductor of the second ground lines from the plate main body.

The utility model relates to the technical field of grounding monitoring, and discloses a signal indoor lightning protection grounding integrated monitoring device comprising a grounding plate, and the upper end of the grounding plate is provided with a connection monitoring structure. The connection monitoring structure comprises a movable sheet, a connecting frame, a fixed plate, two springs, two first terminals, a second terminal, a spiral connecting line and a grounding resistance tester. Through the matching design of the movable sheet, the spring and the connecting frame, the device can adapt to the infinitesimal displacement of the grounding plate caused by temperature change or mechanical stress, the electrical connection between the grounding plate and the movable sheet is always stable in combination with the flexible connection characteristic of the spiral connecting line, and the accuracy of long-term monitoring is remarkably improved; the grounding resistance tester and the grounding plate are physically isolated through the arranged insulation assembly, the electric leakage risk and signal crosstalk are avoided, meanwhile, rapid disassembly and assembly are achieved through bolt fixing, and safety and maintenance convenience are both considered.

The utility model discloses a municipal road underground cable duct bank anti-floating construction structure, and relates to the technical field of municipal construction equipment tools. A municipal road underground cable duct bank anti-floating construction structure comprises a cable duct bank ditch, electric power duct banks, a pipe hoop, a lightning protection grounding plate and a lightning protection grounding electrode are arranged in the cable duct bank ditch, the electric power duct banks are longitudinally arranged, the pipe hoop hoops the electric power duct banks in a surrounding mode in the transverse direction, the lower portion of the pipe hoop is connected with the lightning protection grounding plate, and the lightning protection grounding electrode is connected with the lightning protection grounding plate. The lightning protection grounding plates are arranged in the longitudinal direction and connected between the lightning protection grounding electrodes, and the lower ends of the lightning protection grounding electrodes are inserted into the soil body. In combination with the characteristics of cast-in-place concrete and lightning protection grounding installation construction of the electric power calandria, when the electric power calandria is encapsulated and poured by concrete, the pipe hoop is additionally arranged to be connected with the grounding electrode, and the calandria is prevented from floating upwards in the pouring process by utilizing the friction force between the grounding electrode and soil. Construction defects are reduced, calandria installation is more standard, the engineering quality is improved, and the anti-floating performance of the underground cable calandria is improved.

The utility model belongs to the automobile safety technical field provides a kind of anti-static grounding structure, including elastic conducting part, the quantity of elastic conducting part is multiple and is spiral, the bottom of elastic conducting part is equipped with ground plate, the top of elastic conducting part is equipped with the mounting base plate of fixed connection, the top of mounting base plate is symmetrically equipped with clamping plate, and the cooperation chamber is formed between two clamping plates, and limiting slot is equipped on the opposite surface of two clamping plates;It also includes quick-mounting pedestal installed on vehicle body, the bottom of quick-mounting pedestal is symmetrically equipped with metal plug, the metal plug and the limiting slot are mutually matched, and quick positioning assembly is equipped between quick-mounting pedestal and vehicle body;The utility model can effectively reduce abrasion by the self-adapting conductive structure, ensure that vehicle is continuously efficient in various road conditions Release static electricity.

The present application relates to the field of coking flue gas purification, and particularly relates to a coking furnace flue gas purification device, which comprises a lapping ground plate and a stirring flocculation cylinder fixedly installed on the top outer surface of the lapping ground plate, a atmospheric pollution liquid discharge tank is fixedly installed on the bottom surface of the lapping ground plate, a flocculation and caking backflow pipe arranged on the bottom surface of the stirring flocculation cylinder is fixedly connected to the input end of the atmospheric pollution liquid discharge tank, and a flocculation agent conveying tank is arranged on the top surface of the lapping ground plate. The combined flocculation agent conveying tank is used to infuse the chemical agent and water for flocculation and sedimentation into the stirring flocculation cylinder, so that the agent and water can fill the inside of the stirring flocculation cylinder. At this time, the coking furnace flue gas is infused into the inside of the stirring flocculation cylinder. When the waste gas starts to float from the bottom of the chemical agent, the stirring blade plates are stirred by the combined motor two, so that the waste gas and the chemical agent are fully mixed and stirred together.

The utility model belongs to the technical field of lithium battery bottom welding. The bottom welding structure of the cylindrical lithium battery comprises a base, a grounding plate is fixedly arranged at the top of the base, a limiting sleeve is fixedly arranged at the top of the grounding plate, a limiting barrel is fixedly arranged on the inner wall of the limiting sleeve, a limiting groove is formed in the top of the limiting barrel, and abutting blocks are slidably connected to the inner wall of the limiting groove in an annular structure at equal intervals in a penetrating mode. Two sliding rods are slidably connected to the outer sides of the multiple abutting blocks in a penetrating mode in a vertically symmetrical structure mode, the outer walls of the circumferences of the two sliding rods are sleeved with springs, connecting plates are arranged on the outer sides of the multiple abutting blocks, the multiple connecting plates are slidably connected with the limiting barrel and the limiting sleeve correspondingly, and the connecting plates are fixedly connected with the two sliding rods correspondingly. And a plurality of adjusting hand wheels are rotated, so that a plurality of connecting plates can be pushed to slide towards the interior of a limiting barrel, and the distances among a plurality of abutting blocks can be adjusted, so that the steel shells with different sizes can be clamped.

The invention provides a withstand voltage test connection device, which can quickly connect the detection line with the detected line or with the grounding plate, reducing the complex wiring process in the middle and effectively improving the test efficiency. The withstand voltage test connection device is connected to the cable under test at one end and connected to the detection line of the withstand voltage machine at the other end, and is used to electrically connect the cable under test and the detection line, including a box body, and a grounding plate and an adapter plate installed in the box body, wherein the grounding plate and the adapter plate are laterally fixedly installed in the box body through an insulating component, and the adapter plate is arranged directly above the grounding plate, and a gap is reserved between the adapter plate and the grounding plate; a connecting column is also provided, wherein the connecting column is a conductor, and the connecting column is fixedly arranged on an elastic pin, and the connecting column is connected to the grounding plate or the adapter plate by pressing the elastic pin, and the detection line is electrically connected to the connecting column.

The application relates to the technical field of pipeline laying, in particular to a direct-buried pipeline laying device which comprises four rectangularly-distributed machine bases and a plurality of universal wheels installed below the machine bases, the two ends of a wrapping steel belt are wound by a winding motor, the overall height of the wrapping steel belt and the pipeline is placed, the pipeline can be steadily lowered to a certain height, and the pipeline can be accurately buried in a groove, the device has the characteristics of convenient laying, the rotating angle of a fixed pulley is adjusted to adjust the position of the vertical point of the two ends of the wrapping steel belt, the wrapping steel belt and the pulling rope are prevented from contacting the inner wall of the groove, the device can adapt to grooves with different widths, the normal laying of the pipeline is not affected, the ground plate below the machine base is lowered in synchronization with the rotation adjustment of the fixed pulley until the ground plate is inserted into the ground on the two sides of the groove, the stability of the four machine bases, that is, the overall device, is reinforced during pipeline laying, and the device has the characteristics of further convenient laying.

The invention relates to a bridge rotation smoothness improving device based on the eccentric precession effect of a vibrating rotor, which comprises a rotation bridge and two eccentric precession quick rotation devices, the two eccentric precession quick rotation devices are fixedly arranged at the two ends of the rotation bridge respectively, and a bridge supporting frame is arranged at the lower end of the rotation bridge. The bottom end of the bridge supporting frame is fixedly arranged on a rotating spherical hinge, the rotating spherical hinge is fixedly arranged on a ground plate, and two traction devices are symmetrically arranged on the ground plate in the inclined direction. The invention aims to design and utilize the eccentric rapping rotor auxiliary device with low energy consumption, low mass and low disturbance to activate the power performance of the spherical hinge of the swivel bridge, so that the smoothness and stability of the swivel bridge are improved, and finally, the purpose of a smooth and precise swivel process is achieved.

The invention belongs to the field of agricultural machinery, and particularly discloses an automatic profiling device for a flexible header of a grain harvesting machine, which comprises a mechanical device, a hydraulic system and a control system, the mechanical device comprises a header, a profiling support arm assembly and a gap bridge; the header is mounted at the front end of the gap bridge; the profiling support arm assembly comprises a support arm welding part, a support arm shaft and a shock absorber; the shock absorbers are installed at the two ends of the supporting arm shaft, and one end of the supporting arm welding part is connected with the header through the supporting arm shaft. The other end of the support arm welding part is mounted on a ground contact plate of the header; the hydraulic system is mounted on the profiling support arm assembly; the control system is connected with the header; according to the profiling device, the three angle sensors are installed at the left end and the right end of the header respectively and transmit the angle between the cutting knife and the ground and the angle between the header and the ground in the left-right transverse direction to the controller, the supporting arm at the position is adjusted, the purpose of adjusting the header is achieved, and the situation that the header makes contact with the ground and is damaged is avoided.

A substrate support assembly is described herein, including a utility plate, a ground plate coupled to the utility plate, a fluid conduit disposed within the substrate support assembly and disposed through the utility plate and the ground plate, and a connector coupled to the ground plate, the ground plate housing a portion of the fluid conduit. The connector includes a biasing assembly and a fastener disposed in a pocket formed in the ground plate.

A shield can for an electronic eyewear device is described that reduces RF signals emanating from the electronic eyewear device. The shield can is attached to a ground plate of the electronic eyewear device using leaf springs on a side of the shield can. The leaf springs do not add to the stack-up thickness of the shield can assembly and provide a balanced force against the ground plate. The shield can is attached to a printed circuit board and encompasses radio frequency (RF) electronic components to prevent RF signals emanating from the RF electronic components. The leaf springs have a pair of fingers providing the balanced mechanical point force. A conductive pressure sensitive adhesive is also provided to secure a top surface of the shield can to the ground plate along with a thermal paste.

The utility model provides an antenna module and a vehicle, the antenna module comprises a circuit board and a radiator arranged on the circuit board, and the circuit board comprises a main body part and a protruding part which are connected; wherein the main body part comprises a first grounding plate and a first metal wire, the grounding end of the radiator is connected with the first grounding plate, and the first metal wire and at least part of the first grounding plate are overlapped along the thickness direction of the circuit board; the protruding part comprises a second metal wire and a first isolation piece, the second metal wire and the first grounding plate are not overlapped in the thickness direction of the circuit board, the first isolation piece is connected between the first metal wire and the second metal wire in series, and the first isolation piece is used for reducing the coupling current of the radiator on the second metal wire. According to the antenna module and the vehicle disclosed by the invention, the coupling current of the radiator on the second metal wire is effectively reduced, so that the influence of the coupling current on the second metal wire on the symmetrical field distribution of the first grounding plate is reduced.

The invention relates to the technical field of antennas, in particular to a multi-frequency broadband common-caliber circularly polarized antenna. The antenna comprises a grounding plate, a patch radiator, a plurality of monopole groups and a feed assembly, the grounding plate is arranged at the bottom of the whole antenna, the patch radiator is arranged above the grounding plate, each monopole group corresponds to one frequency band and comprises a plurality of monopoles, the monopoles are distributed in the circumferential direction of the patch radiator, and the feed assembly is arranged above the patch radiator. The multiple monopoles of the multiple monopole groups are sequentially arranged in a staggered mode, one end of each monopole is electrically connected with the grounding plate, the other end of each monopole is in an open circuit state, and the patch radiator inputs radio frequency signals through the feed assembly. The antenna provided by the invention has the characteristics of multi-frequency independent tuning and design flexibility, high efficiency, light weight, low-cost structural characteristics, structural expandability and engineering realization simplicity and convenience.

The utility model discloses a mine car with a car arrester, and relates to the technical field of mine car equipment. The mine car with the car arrester comprises a moving structure, a transporting structure is arranged at the top end of the moving structure, two positioning structures are arranged in the moving structure, and the two positioning structures are located on the two sides of the transporting structure correspondingly; according to the mine car with the car arrester, a positioning structure is arranged, and a built-in motor in a driving box is used for promoting a moving ring to drive a follow-up inclined block to move towards an abutting wheel through a rotating shaft, so that the abutting wheel is driven by the follow-up inclined block to drive a lifting plate to drive a ground contact plate to gradually make contact with the ground; the contact friction force between the mine car and the ground can be increased through contact between the ground contact plate and the ground, so that the mine car has the braking effect, and the phenomenon that the mine car is prone to sliding on a track-free roadway bottom plate is avoided.

The invention relates to the technical field of antennas, in particular to a circular polarization patch antenna with a wide axial ratio bandwidth. The antenna comprises a patch, a grounding plate, parasitic units and a reactance load structure, the grounding plate is located at the lowest layer of the whole antenna, the patch and the parasitic units are arranged above the grounding plate at intervals, the parasitic units are arranged near the patch, coupling gaps are arranged between the parasitic units and the patch at intervals, and the reactance load structure is connected to the parasitic units. The reactance load structure adopts one or more combinations of the following structural forms: a capacitive element combined connection conductor, an extension branch knot and a short circuit column. According to the circularly polarized patch antenna with the wide axial ratio bandwidth, the parasitic unit regulated and controlled by the load is arranged beside the main radiation patch, so that the problems of narrow axial ratio bandwidth, complicated structure or high cost of a circularly polarized antenna in the prior art are effectively solved.

The invention relates to the technical field of raised floors for clean rooms, in particular to a raised floor for a clean room, which comprises an accommodating groove arranged under the ground, an end cover is movably arranged on the side edge of the accommodating groove, and supporting legs are arranged in the accommodating groove in a folding manner. A locking device for stabilizing the supporting leg is arranged in the containing groove, a supporting seat for mounting the floor body is arranged at the top of the supporting leg, an adjusting rod is arranged at the bottom of the supporting seat and connected with the supporting leg, and a clamping device for connecting the floor body is arranged on the side edge of the adjusting rod. And during workshop conversion application, a pipeline at the bottom is removed, disassembly of the supporting legs is omitted, the construction efficiency is improved, the whole raised floor system does not need to be disassembled, and the work amount and the recovery difficulty are greatly reduced.

An electrical connector is described that can be used in sandwich applications. In one example, a sheet in the electrical connector includes a ground shield, two terminals extending within the ground shield, an insulating frame, and a cover plate. The ground shield includes two sidewalls defining a trench. A first ground shield terminal head and a second ground shield terminal together form a ground shield terminal pair at a first end of the sheet. A first signal terminal and a second signal terminal together form a terminal pair residing in the trench. The insulating frame holds the ground shield and the terminal pair, and the cover plate is electrically coupled to the ground shield and extends over the trench.