A forward and backward wave motion compensation mechanism for offshore platform personnel boarding gangway

Abstract

The present invention discloses a forward and backward wave motion compensation mechanism for a gangway for boarding personnel on an offshore platform, comprising a hull docked in front of a fixed frame of the offshore platform, a body of the forward and backward wave motion compensation mechanism for the boarding ladder fixed on the front side of the fixed frame of the offshore platform, and a gangway platform. The present invention is provided with a series of structures, which are convenient for temporary clamping with the hull to form an integral body during overlapping, and when the hull is swung forward and backward by the waves of the water body, the overlapping structure is driven to move synchronously and consistently, and stable adaptive forward and backward precise compensation is performed to form a relative static effect, and prevent the relative movement from causing a hard collision between the feet of personnel and the L-shaped overlapping plate when climbing, causing injuries, improving the safety and stability of use, facilitating automatic unblocking after climbing is completed, preventing continued traction and swinging by the hull, and facilitating automatic folding of the front L-shaped overlapping plate after climbing is completed to reduce the occupied space and enhance the front side protection effect, thereby improving the flexibility and safety of use.

Description

Technical Field

[0001] The invention relates to the technical field of gangway for platform personnel to board, and in particular to a forward and backward wave motion compensation mechanism for gangway for offshore platform personnel to board. Background Art

[0002] Due to the unpredictable wind and waves at sea, the ship will inevitably rise and fall and swing back and forth under the action of the waves, making it difficult for the staff to pass normally and safely. The sea transport boat and the offshore platform rely on the boarding ladder and gangway platform installed on the offshore platform. The boarding ladder is raised and lowered on the top of the sea transport boat. The sea transport boat personnel enter the gangway platform through the boarding ladder and then enter the offshore platform to work;

[0003] The existing boarding gangway on the offshore platform for connecting the marine transport boat (hull) is provided with a lifting structure to drive the boarding gangway to lift and lower for connecting and separating, but there are the following shortcomings when in use:

[0004] 1. Although the boat (hull) usually has a parking function, it will still swing slightly back and forth due to the influence of water waves, while the boarding gangway is stationary, and there will be relative movement between the two. In this way, when people climb up the boarding gangway, it is easy for the back and forth swing to cause the feet of the people to collide with the boarding gangway; the boarding gangway cannot be stably and adaptively compensated for the back and forth movement to ensure that it is consistent with the back and forth movement of the hull, making it difficult to stably climb to the boarding gangway, and the stability of use is not ideal; 2. The boarding gangway is long and cannot automatically fold the front side of the boarding gangway after use, so the flexibility of use is not ideal;

[0005] In order to solve the problems that the fore-and-aft motion compensation of the boarding gangway cannot be stably and adaptively performed to ensure consistency with the fore-and-aft motion of the hull and the front side of the boarding gangway cannot be automatically folded after use, we propose a fore-and-aft wave motion compensation mechanism for the boarding gangway of offshore platform personnel to solve the above problems. Summary of the invention

[0006] The present invention proposes a forward and backward wave motion compensation mechanism for an offshore platform personnel boarding gangway, which solves the problems of being unable to stably and adaptively compensate for the forward and backward motion of the boarding gangway to ensure consistency with the forward and backward motion of the hull and being unable to automatically fold the front side of the boarding gangway after use.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a forward and backward wave motion compensation mechanism for boarding ladders of offshore platforms, comprising a hull docked in front of an offshore platform fixed frame, a forward and backward wave motion compensation mechanism body of the boarding ladder fixed to the front side of the offshore platform fixed frame, and a gangway platform, wherein a plurality of rubber fenders for mooring transportation boats are fixedly connected to the front side of the offshore platform fixed frame, and a round card roller is fixedly installed on the top rear side of the hull; the rubber fenders for mooring transportation boats are used to reduce the phenomenon of hard collision during the docking process of the hull;

[0008] The body of the boarding ladder forward and backward wave motion compensation mechanism comprises a first gangway board arranged in front of the offshore platform fixed frame, the first gangway board is located on the left side of the gangway platform, and a lifting vertical guide assembly is installed between the outer side of the offshore platform fixed frame and the outer side of the first gangway board; the lifting vertical guide assembly is used to drive the first gangway board to vertically lift and lower, and the gangway platform is a support platform on the offshore platform for personnel to pass and is close to the first gangway board, and is used for personnel to directly walk from the first gangway board or jump to the top of it for passage;

[0009] The sliding sleeve on the first gangway board is provided with a rectangular sliding sleeve, and the fixed sleeve in the rectangular sliding sleeve is provided with a second gangway board, and the front side of the second gangway board is fixedly connected with an L-shaped lap plate, and the bottom of the L-shaped lap plate is rotatably installed with an abutting rotating drum that is in active contact with the top of the hull, and the bottom rear side of the first gangway board is embedded with a PLC controller, and the bottom of the L-shaped lap plate is embedded with a clamping sleeve positioning component electrically connected to the PLC controller, and the clamping sleeve positioning component is movably clamped on the outside of the circular clamping roller; the rectangular sliding sleeve and the second gangway board are used to drive the L-shaped lap plate to rise and fall when the first gangway board is raised and lowered, and the L-shaped lap plate is used to abut against the top of the hull when it is lowered for people to climb and walk, and the clamping sleeve positioning component is used to clamp with the circular clamping roller when the L-shaped lap plate moves down, so that the L-shaped lap plate and the hull are temporarily integrated;

[0010] A pressure detection component electrically connected to the PLC controller is installed on the top of the rectangular sleeve; the pressure detection component is used to detect the pressure when a person walks to the top of the rectangular sleeve and transmit the pressure value to the PLC controller;

[0011] The front side of the first gangway board is embedded and fixed with an electric telescopic rod electrically connected to the PLC controller, and the rear side of the second gangway board is embedded with an adaptive elastic front-to-back motion compensation support component fixedly connected to the extended end of the electric telescopic rod; the adaptive elastic front-to-back motion compensation support component is used to drive the second gangway board and the L-shaped lap plate to move left and right to adjust the clamping position when the electric telescopic rod is started, and the adaptive elastic front-to-back motion compensation support component is also used to adaptively guide and elastically support the second gangway board when the hull is slightly swung back and forth by the waves of the water body after the clamping, and the L-shaped lap plate and the second gangway board are driven to swing back and forth through the clamping part, and the elastic cross-guide support is used to cooperate with the clamping to form an integral body, so as to provide the second gangway board and the L-shaped lap plate with the effect of swinging back and forth in unison with the hull, and the consistent forward and backward movement of the two forms a relative static effect, so as to realize the adaptive forward and backward motion precise compensation work, so as to facilitate personnel to board the L-shaped lap plate and the second gangway board from the hull, and prevent the relative movement from causing collision with personnel during climbing, and the PLC controller is used to control the clamping sleeve positioning component and the circular clamping roller to automatically release the clamping when the received pressure value increases to exceed the preset value.

[0012] Preferably, the lifting vertical guide assembly comprises two gangway sliding guide rails fixedly mounted and symmetrically arranged on the front side of the offshore platform fixed frame, a T-shaped slide groove with an opening at the top is arranged on the adjacent side of the two gangway sliding guide rails, a T-shaped slide groove is provided with a sliding sleeve provided with a T-shaped slider, and the adjacent sides of the two T-shaped sliders are respectively fixedly connected with the two sides of the first gangway ladder plate, an electric hoist is fixedly mounted on the top of the offshore platform fixed frame, and the bottom end of the steel wire lifting rope of the electric hoist is fixedly mounted on the top of the first gangway ladder plate; the gangway sliding guide rail, T-shaped slider, electric hoist and steel wire lifting rope cooperate, and the electric hoist is used to lift and lower the first gangway ladder plate through its own steel wire lifting rope, and the T-shaped slider can be used to vertically slide in the corresponding gangway sliding guide rail to realize vertical guidance of the first gangway ladder plate, thereby realizing vertical lifting of the first gangway ladder plate.

[0013] Preferably, the sleeve positioning assembly includes a fixed sleeve embedded and fixed at the bottom of the L-shaped lap plate, an electric push rod electrically connected to the PLC controller is fixedly installed on the top inner wall of the fixed sleeve, the protruding end of the electric push rod is fixedly connected to a U-shaped clamping block, the U-shaped clamping block is movably sleeved on the outside of the circular clamping roller, the lower part of the front inner wall and the lower part of the rear inner wall of the U-shaped clamping block are both arranged in an arc structure, the top of the U-shaped clamping block is rectangular and fixedly connected to four vertical guide rods, and the fixed sleeve sliding sleeve is arranged on the four vertical guide rods; the set fixed sleeve, electric push rod, U-shaped clamping block and vertical guide rod cooperate, and when the U-shaped clamping block and the circular clamping roller are in a vertically aligned state, the fixed sleeve and the electric push rod are sequentially moved downward by using the L-shaped lap plate to move downward. The U-shaped clamping block is driven downward to clamp on the outside of the circular clamping roller. When clamped, the L-shaped lap plate and the hull are temporarily integrated. When the hull is slightly swung back and forth by waves in the water body, the L-shaped lap plate and the second gangway plate are driven to swing back and forth in an integrated manner through the U-shaped clamping block, vertical guide rod and fixed sleeve in turn, so that the amplitude of the forward and backward swing is consistent with that of the hull, and the consistent forward and backward movement is used to form a relative static effect, so as to realize the precise compensation of adaptive forward and backward movement, and prevent the phenomenon that relative movement causes collision with the L-shaped lap plate when people climb. Subsequently, when the pressure value received by the PLC controller exceeds the preset value, the electric push rod will be controlled to start in reverse, so that it drives the U-shaped clamping block to separate from the circular clamping roller for timely release.

[0014] Preferably, the pressure detection component includes a rectangular groove opened on the top of the rectangular sliding sleeve, the sliding sleeve in the rectangular groove is provided with a tread plate, a pressure sensor electrically connected to the PLC controller is fixedly installed between the bottom inner wall of the rectangular groove and the bottom of the tread plate, the bottom of the tread plate is rectangular and fixedly connected with four vertical guide shafts, and four vertical guide grooves are opened on the bottom inner wall of the rectangular groove, which are respectively slidably connected to the outer sides of the corresponding vertical guide shafts; the rectangular groove, tread plate, pressure sensor, vertical guide shaft and vertical guide groove cooperate to form pressure on the tread plate when people pass to the rectangular sliding sleeve, so that the downward extrusion force of the tread plate on the pressure sensor increases, the pressure sensor detects the extrusion force and transmits it to the PLC controller. When the pressure value exceeds the preset value, the PLC controller controls the electric push rod to start in reverse, and judges that the climbing of the person is completed by detecting the increase in pressure value to automatically release the card, thereby enhancing the degree of automation.

[0015] Preferably, the adaptive elastic front-to-back motion compensation support assembly includes a return seat embedded and fixed on the rear side of the second gangway board, a plurality of springs are fixedly connected to the front inner wall of the return seat, the rear ends of the plurality of springs are fixedly connected to the same moving seat, the rear side of the moving seat is fixedly connected to two cross guide rods, the rear ends of the two cross guide rods are slid out to the rear of the return seat and are fixedly connected to the same connecting plate, the rear side of the connecting plate is fixedly connected to the extended end of the electric telescopic rod; the return seat, spring, moving seat, cross guide rod and connecting plate are arranged to cooperate, and when the U-shaped clamping block is not vertically aligned with the circular clamping roller, personnel can control the electric telescopic rod to start The L-shaped lap plate drives the U-shaped clamping block to move forward or backward to adjust and align the U-shaped clamping block. In addition, in the clamped state, when the hull swings back and forth to drive the second gangway plate and the L-shaped lap plate to swing back and forth, the second gangway plate drives the clamping seat to slide back and forth on the two cross guide rods and stretches or compresses multiple springs. By utilizing the elastic support of the springs, space for the second gangway plate and the L-shaped lap plate to swing back and forth can be provided, thereby ensuring the stable implementation of the compensation work for the forward and backward swinging.

[0016] Preferably, a first wireless remote control switch is fixed and electrically connected to the left side of the electric telescopic rod, a second wireless remote control switch is fixed and electrically connected to the right side of the electric push rod, and the first wireless remote control switch and the second wireless remote control switch are matched with the same external remote control.

[0017] Preferably, an embedding groove is opened on the bottom rear side of the first gangway plate, a lithium battery is fixedly installed on the top inner wall of the embedding groove, a PLC controller is fixedly installed on the bottom of the lithium battery, and the PLC controller, the electric telescopic rod and the electric push rod are all electrically connected to the lithium battery.

[0018] Preferably, a limiting groove is provided on the bottom inner wall of the rectangular sliding sleeve, and an L-shaped limiting block slidably connected to the limiting groove is fixedly connected to the front bottom of the first gangway plate.

[0019] Preferably, the bottom of the fixing sleeve is provided with four guide grooves which are respectively slidably connected to the outer sides of the corresponding vertical guide rods.

[0020] Preferably, the front side of the second gangway plate may also be disconnected from the L-shaped lap plate and be set to an arc-shaped structure, and a flip drive component electrically connected to the PLC controller and the lithium battery is installed between the second gangway plate and the L-shaped lap plate. When the pressure value received by the PLC controller increases to exceed a preset value, the flip drive component is controlled by the PLC controller to automatically drive the L-shaped lap plate to flip upward for folding and front shielding. The flip drive component includes a rotating shaft, and a mounting hole with an opening on the front side is opened at the top of the second gangway plate. The rotating shaft is rotatably installed on the right inner wall of the mounting hole, and the second A servo brake motor with an output shaft fixedly connected to the left end of the rotating shaft is fixedly installed on the left side of the second gangway plate, a connecting seat is fixedly connected between the front side of the rotating shaft and the rear side of the L-shaped lap plate, the same arc-shaped elastic shielding rubber pad is bonded and fixed between the top front side of the second gangway plate and the top rear side of the L-shaped lap plate, a U-shaped stopper is fixedly connected to the bottom front side of the second gangway plate, the top front side of the U-shaped stopper is in movably contact with the bottom of the L-shaped lap plate, the servo brake motor is electrically connected to the PLC controller and the lithium battery, and a third wireless remote control switch that cooperates with the external remote control is fixed and electrically connected to the bottom of the servo brake motor.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. A forward and backward wave motion compensation mechanism for a boarding gangway of an offshore platform, which cooperates with a lifting vertical guide assembly, a first gangway plate, a rectangular sliding sleeve, a second gangway plate, an L-shaped overlapping plate and an abutting rotating drum, can lift and lower the boarding gangway overlapping structure through the steel wire lifting rope of an electric hoist to overlap and separate with the hull for personnel to climb and pass, and by releasing the steel wire lifting rope a little more during descent to reserve a part of the downward travel of the overlapping structure, the overlapping structure can achieve the effect of adaptive up and down integrated movement when the hull floats and sinks, and the integrated up and down movement has a significant effect of preventing relative collision;

[0023] 2. A mechanism for compensating for forward and backward wave motions of a gangway for boarding personnel on an offshore platform. The mechanism cooperates with a first gangway plate, a rectangular sliding sleeve, a second gangway plate, an L-shaped lap plate, a sleeve positioning assembly, a circular clamping roller, an adaptive elastic forward and backward motion compensation support assembly, an electric telescopic rod and a PLC controller. The mechanism can be temporarily clamped together with the hull during lap connection to form an integral whole. When the hull is swung forward and backward by water waves, the L-shaped lap plate and the second gangway plate are driven to move integrally for compensation, so as to achieve a stable and adaptive effect of accurately compensating for the forward and backward motions of the lap joint structure to ensure the consistency with the forward and backward motions of the hull. The consistency of forward and backward motion is used to form a relative static effect, so as to prevent the relative motion from causing a hard collision between the feet of personnel and the L-shaped lap plate when climbing, thereby facilitating personnel to safely and stably climb to the lap joint structures such as the second gangway plate and the L-shaped lap plate, thereby improving the safety and stability of use. The clamping has the significant advantages of high consistency and synchronization of forward and backward swings, so as to achieve a high adaptive compensation effect, thereby avoiding the phenomenon that conventional electric compensation is prone to misjudgment.

[0024] 3. A forward and backward wave motion compensation mechanism for boarding gangway of offshore platform personnel, which can judge the completion of personnel climbing by detecting the increase of pressure value through the cooperation of the set PLC controller, rectangular sliding sleeve, clamping sleeve positioning component and pressure detection component, and automatically release the clamping roller on the hull when the climbing is completed, so as to enhance the degree of automation, so that after the climbing is completed, the personnel are no longer pulled forward and backward by the hull, and the forward and backward swing compensation work is gradually stopped, so as to facilitate the personnel to continue to pass; it has the advantage of stopping the swing after climbing and gradually stabilizing automatically;

[0025] 4. A forward and backward wave motion compensation mechanism for the gangway for offshore platform personnel to board can automatically fold the front L-shaped lap plate after personnel climb onto the lap structure through the cooperation of the PLC controller, the second gangway plate, the L-shaped lap plate and the flip drive assembly to reduce the occupied space and enhance the front side protection effect, thereby improving the flexibility and safety of use; it has the advantage of automatic and operation-free folding.

[0026] The present invention is provided with a series of structures, which are convenient for temporary clamping with the hull to form an integral whole during overlapping, and when the hull is swung back and forth by the waves of the water body, the overlapping structure is driven to move synchronously and consistently, and stable adaptive front and rear precise compensation work is performed to form a relative static effect, so as to prevent the relative movement from causing injuries to the feet of people when climbing due to hard collision with the L-shaped overlapping plate, thereby improving the safety and stability of use, facilitating automatic release after climbing is completed to prevent continued traction and swinging by the hull, and facilitating automatic folding of the front L-shaped overlapping plate after climbing is completed to reduce the occupied space and enhance the front side protection effect, thereby improving the flexibility and safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1This is a schematic diagram of a top view of the structure of a forward and backward wave motion compensation mechanism for offshore platform personnel boarding a gangway, as proposed in the first embodiment of the present invention;

[0028] Figure 2 This is a left-side structural schematic diagram of a forward and backward wave motion compensation mechanism for offshore platform personnel boarding a gangway proposed in the first embodiment of the present invention;

[0029] Figure 3 for Figure 2 A three-dimensional diagram of the front-to-back wave motion compensation mechanism of the boarding ladder and the clamping state of the circular clamping roller;

[0030] Figure 4 for Figure 2 A part of the structure of the enlarged cross-section diagram;

[0031] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part B in FIG.

[0032] Figure 6 This is a schematic diagram of a top view of the structure of a forward and backward wave motion compensation mechanism for offshore platform personnel boarding a gangway, as proposed in the second embodiment of the present invention;

[0033] Figure 7 This is a left-side structural schematic diagram of a forward and backward wave motion compensation mechanism for offshore platform personnel boarding a gangway proposed in a second embodiment of the present invention;

[0034] Figure 8 for Figure 7 A three-dimensional diagram of the front-to-back wave motion compensation mechanism of the boarding ladder and the clamping state of the circular clamping roller;

[0035] Fig. 9 for Figure 7 The enlarged cross-sectional structural diagram of part C in FIG.

[0036] Fig.10 for Fig. 9 The D part in the figure is an enlarged structural diagram;

[0037] Fig.11 for Figure 7 Schematic diagram of the structure in which the L-shaped lap plate is flipped upward.

[0038] In the figure: 100, offshore platform fixed frame; 200, rubber fender for mooring transportation boat; 300, gangway platform; 400, hull; 1, electric hoist; 101, wire hoist rope; 102, gangway sliding guide rail; 103, T-shaped slider; 2, first gangway board; 201, lithium battery; 202, PLC controller; 203, electric telescopic rod; 204, first wireless remote control switch; 3, rectangular sliding sleeve; 301, rectangular groove; 302, stepping plate; 303, pressure sensor; 304, vertical guide shaft; 305 , vertical guide groove; 306, L-shaped limit block; 307, limit groove; 4, second gangway plate; 5, L-shaped overlap plate; 501, abutment drum; 6, fixed sleeve; 601, electric push rod; 602, U-shaped clamping block; 603, vertical guide rod; 7, circular seat; 701, moving seat; 702, spring; 703, horizontal guide rod; 704, connecting plate; 8, round clamping roller; 9, rotating shaft; 901, mounting hole; 902, arc elastic shielding pad; 903, connecting seat; 904, U-shaped block; 905, servo brake motor. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Embodiment 1

[0041] like Figures 1 to 5 As shown, the present embodiment proposes a forward and backward wave motion compensation mechanism for boarding ladders for offshore platform personnel, comprising a hull 400 docked in front of an offshore platform fixed frame 100, a boarding ladder forward and backward wave motion compensation mechanism body and a gangway platform 300 fixed to the front side of the offshore platform fixed frame 100, a plurality of rubber fenders 200 for mooring traffic boats are fixedly connected to the front side of the offshore platform fixed frame 100, a round card roller 8 is fixedly installed on the top rear side of the hull 400, wherein a plurality of connecting rods for fixed support are fixedly connected between the bottom of the round card roller 8 and the top of the hull 400; the rubber fenders 200 for mooring traffic boats are used to reduce the phenomenon of hard collision during the docking process of the hull 400;

[0042] The body of the boarding ladder forward and backward wave motion compensation mechanism includes a first gangway board 2 arranged in front of the offshore platform fixed frame 100, the first gangway board 2 is located on the left side of the gangway platform 300, and a lifting vertical guide assembly is installed between the outer side of the offshore platform fixed frame 100 and the outer side of the first gangway board 2; the lifting vertical guide assembly is used to drive the first gangway board 2 to lift vertically, and the gangway platform 300 is a support platform for personnel to pass on the offshore platform and is close to the first gangway board 2, and is used for personnel to directly walk from the first gangway board 2 or jump to the top of it for passage;

[0043] A rectangular sliding sleeve 3 is provided on the sliding sleeve of the first gangway plate 2, wherein a limiting groove 307 is provided on the inner wall at the bottom of the rectangular sliding sleeve 3, an L-shaped limiting block 306 which is slidably connected to the limiting groove 307 is fixedly connected to the bottom of the front side of the first gangway plate 2, which has the effect of limiting and preventing the rectangular sliding sleeve 3 from falling off, a second gangway plate 4 is fixedly provided in the rectangular sliding sleeve 3, an L-shaped lap plate 5 is fixedly connected to the front side of the second gangway plate 4, an abutting rotating drum 501 which is movably in contact with the top of the hull 400 is rotatably installed at the bottom of the L-shaped lap plate 5, a PLC controller 202 is embedded on the rear side of the bottom of the first gangway plate 2, and a contact drum 501 which is electrically connected to the PLC controller 202 is embedded on the bottom of the L-shaped lap plate 5. The sleeve positioning component is connected, and the sleeve positioning component is movable sleeved on the outside of the circular clamping roller 8; the rectangular sliding sleeve 3 and the second gangway plate 4 are used to drive the L-shaped lap plate 5 to rise and fall when the first gangway plate 2 is raised and lowered, and the L-shaped lap plate 5 is used to abut against the top of the hull 400 when it descends for people to climb and walk, and the sleeve positioning component is used to clamp with the circular clamping roller 8 when the L-shaped lap plate 5 moves down, so that the L-shaped lap plate 5 and the hull 400 are temporarily integrated; a pressure detection component electrically connected to the PLC controller 202 is installed on the top of the rectangular sliding sleeve 3; the pressure detection component is used to detect the pressure when the personnel walk to the top of the rectangular sliding sleeve 3 and transmit the pressure value to the PLC controller 202;

[0044] An electric telescopic rod 203 electrically connected to the PLC controller 202 is embedded and fixed on the front side of the first gangway plate 2, wherein the front side of the first gangway plate 2 is provided with an embedding hole fixedly installed with the top of the electric telescopic rod 203, and the rear side of the second gangway plate 4 is embedded with an adaptive elastic front-to-back motion compensation support component fixedly connected to the protruding end of the electric telescopic rod 203; the adaptive elastic front-to-back motion compensation support component is used to drive the second gangway plate 4 and the L-shaped lap plate 5 to move left and right to adjust the clamping position when the electric telescopic rod 203 is started, and the adaptive elastic front-to-back motion compensation support component is also used to, after clamping, cause the hull 400 to swing slightly back and forth due to the waves of the water body and to adjust the clamping position through the clamping When the L-shaped lap plate 5 and the second gangway plate 4 are driven to swing back and forth, the second gangway plate 4 is adaptively guided forward and backward and elastically supported, and the elastic cross-guide support is used to cooperate with the card assembly to form an integral body, so that the second gangway plate 4 and the L-shaped lap plate 5 can swing forward and backward in unison with the hull 400, and the consistent forward and backward movement of the two forms a relative static effect, thereby realizing the adaptive forward and backward movement precision compensation work, so as to facilitate personnel to board the L-shaped lap plate 5 and the second gangway plate 4 from the hull 400, and prevent the relative movement from causing collision with personnel when climbing. The set PLC controller 202 is used to control the automatic release of the card sleeve positioning assembly and the circular card roller 8 when the received pressure value increases to exceed the preset value.

[0045] Specifically, the lifting vertical guide assembly includes two gangway sliding guide rails 102 fixedly mounted on the front side of the offshore platform fixed frame 100 and symmetrically arranged. The adjacent sides of the two gangway sliding guide rails 102 are each provided with a T-shaped slide groove with an opening at the top. The sliding sleeve in the T-shaped slide groove is provided with a T-shaped slider 103. The adjacent sides of the two T-shaped sliders 103 are respectively fixedly connected to the two sides of the first gangway ladder plate 2. The top of the offshore platform fixed frame 100 is fixedly mounted with an electric hoist hoist 1, and the bottom end of the steel wire lifting rope 101 of the electric hoist hoist 1 is fixedly mounted on the top of the first gangway ladder plate 2; the gangway sliding guide rails 102, the T-shaped slider 103, the electric hoist hoist 1 and the steel wire lifting rope 101 cooperate, and the electric hoist hoist 1 is used to lift and lower the first gangway ladder plate 2 through its own steel wire lifting rope 101. The T-shaped slider 103 can be used to vertically slide in the corresponding gangway sliding guide rail 102 to realize vertical guidance of the first gangway ladder plate 2, thereby realizing vertical lifting of the first gangway ladder plate 2.

[0046] Furthermore, the card sleeve positioning assembly includes a fixed sleeve 6 embedded and fixed at the bottom of the L-shaped lap plate 5, and an electric push rod 601 electrically connected to the PLC controller 202 is fixedly installed on the top inner wall of the fixed sleeve 6, and a U-shaped clamping block 602 is fixedly connected to the protruding end of the electric push rod 601. The U-shaped clamping block 602 is movably clamped on the outside of the circular clamping roller 8. The lower part of the front inner wall and the lower part of the rear inner wall of the U-shaped clamping block 602 are both set as arc structures. The top of the U-shaped clamping block 602 is rectangular and fixedly connected with four vertical guide rods 603. The fixed sleeve 6 is slidably sleeved on the four vertical guide rods 603, wherein the fixed sleeve 6 The bottom of the first gangway plate 2 is provided with four guide grooves which are respectively connected to the outer sides of the corresponding vertical guide rods 603 for sliding, so as to guide the vertical sliding of the vertical guide rods 603. The bottom rear side of the first gangway plate 2 is provided with an embedding groove, on the top inner wall of which a lithium battery 201 is fixedly installed. The PLC controller 202 is fixedly installed at the bottom of the lithium battery 201. The PLC controller 202, the electric telescopic rod 203 and the electric push rod 601 are all electrically connected to the lithium battery 201. The left side of the electric telescopic rod 203 is fixedly connected to the first wireless remote control switch 204. The right side of the electric push rod 601 is fixedly connected to the first wireless remote control switch 204. The first wireless remote control switch 204 and the second wireless remote control switch are matched with the same external remote control; the fixed sleeve 6, the electric push rod 601, the U-shaped clamping block 602 and the vertical guide rod 603 are matched, and when the U-shaped clamping block 602 and the circular clamping roller 8 are in a vertically aligned state, the L-shaped lap plate 5 is moved downward and driven by the fixed sleeve 6 and the electric push rod 601 to clamp the U-shaped clamping block 602 downward on the outside of the circular clamping roller 8 in sequence, and the L-shaped lap plate 5 is temporarily integrated with the hull 400 under the clamping, and the hull 400 is slightly moved forward by the water wave. When swinging backward, the U-shaped block 602, the vertical guide rod 603 and the fixed sleeve 6 will drive the L-shaped lap plate 5 and the second gangway plate 4 to swing forward and backward in an integrated manner, so that the amplitude of their forward and backward swinging is consistent with that of the hull 400, and the consistent forward and backward movement is used to form a relative static effect, thereby realizing the adaptive forward and backward movement precision compensation work, and preventing the relative movement from causing collision with the L-shaped lap plate 5 when people climb. Subsequently, when the pressure value received by the PLC controller 202 exceeds the preset value, the electric push rod 601 will be controlled to start in reverse, so that it drives the U-shaped block 602 to separate from the circular card roller 8 for timely release.

[0047] Furthermore, the pressure detection component includes a rectangular groove 301 opened at the top of the rectangular sliding sleeve 3, a stepping plate 302 is slidably sleeved in the rectangular groove 301, a pressure sensor 303 electrically connected to the PLC controller 202 is fixedly installed between the bottom inner wall of the rectangular groove 301 and the bottom of the stepping plate 302, the bottom of the stepping plate 302 is rectangular and fixedly connected with four vertical guide shafts 304, and four vertical guide grooves 305 are opened on the bottom inner wall of the rectangular groove 301 and are slidably connected to the outer sides of the corresponding vertical guide shafts 304; the rectangular groove 301, the stepping plate 302 are fixedly connected with the bottom inner wall of the rectangular groove 301, and the vertical guide grooves 305 are slidably connected to the outer sides of the corresponding vertical guide shafts 304; The plate 302, the pressure sensor 303, the vertical guide shaft 304 and the vertical guide groove 305 cooperate with each other. When a person passes to the rectangular sliding sleeve 3, the stepping plate 302 is pressed, so that the downward squeezing force of the stepping plate 302 on the pressure sensor 303 increases. The pressure sensor 303 detects the squeezing force and transmits it to the PLC controller 202. When the pressure value exceeds the preset value, the PLC controller 202 controls the electric push rod 601 to start in reverse. By detecting the increase in pressure value, it is judged that the person has completed climbing and the card is automatically released, thereby enhancing the degree of automation.

[0048] Furthermore, the adaptive elastic front-to-back motion compensation support assembly includes a return seat 7 embedded and fixed on the rear side of the second gangway plate 4, a plurality of springs 702 are fixedly connected to the front inner wall of the return seat 7, the rear ends of the plurality of springs 702 are fixedly connected to the same moving seat 701, the rear side of the moving seat 701 is fixedly connected to two cross guide rods 703, the rear ends of the two cross guide rods 703 are slid out to the rear of the return seat 7 and are fixedly connected to the same connecting plate 704, wherein the rear side of the return seat 7 is provided with two cross guide holes which are respectively connected to the outer sides of the corresponding cross guide rods 703 for sliding, so as to guide the transverse sliding of the return seat 7, and the rear side of the connecting plate 704 is fixedly connected to the protruding end of the electric telescopic rod 203; the return seat 7, spring 702, moving seat 701, cross guide rod 703 and connecting plate 704 are arranged to cooperate with each other in the U-shaped block When 602 is not vertically aligned with the circular clamping roller 8, personnel can operate the electric telescopic rod 203 to start it to drive the connecting plate 704 to move forward or backward. The connecting plate 704 drives the second gangway plate 4 and the L-shaped lap plate 5 to move forward or backward in turn through the transverse guide rod 703, the moving seat 701, the spring 702 and the return seat 7. The L-shaped lap plate 5 drives the U-shaped clamping block 602 to move forward or backward for adjustment and alignment. In addition, in the clamped state, when the hull 400 swings back and forth to drive the second gangway plate 4 and the L-shaped lap plate 5 to swing back and forth, the second gangway plate 4 drives the return seat 7 to slide back and forth on the two transverse guide rods 703, and stretches or compresses multiple springs 702. By utilizing the elastic support of the spring 702, space can be provided for the second gangway plate 4 and the L-shaped lap plate 5 to swing forward and backward, thereby ensuring the stable implementation of their forward and backward swing compensation work.

[0049] The present embodiment can raise and lower the boarding gangway overlap structure to overlap and separate it from the hull 400 for personnel to climb and pass through, and can utilize the method of releasing a little more of the wire lifting rope 101 during descent to reserve a part of the downward travel for the overlap structure, thereby realizing the effect of adaptive up and down integrated movement of the overlap structure when the hull 400 floats and sinks; it is convenient to temporarily fit with the hull 400 to form a whole during overlap, and drive the overlap structure to move synchronously and consistently when the hull 400 is swung back and forth by the waves of the water body, perform stable adaptive front and back precise compensation, form a relative static effect, prevent the relative movement from causing the feet of personnel to collide with the L-shaped overlap plate 5 when climbing, causing injuries, and improve the safety and stability of use; it is convenient to automatically release the card after climbing is completed to prevent continued traction and swinging by the hull 400, so that the overlap structure gradually stops swinging and provides stable support, which is convenient for personnel to continue to pass through.

[0050] The method of using this embodiment is as follows: after the hull 400 is docked, when overlapping, the U-shaped block 602 is first vertically aligned with the circular card roller 8. If they are not aligned, the personnel use the external remote control to control the first wireless remote control switch 204 to control the electric telescopic rod 203 to start, so that it drives the second gangway plate 4 and the L-shaped overlapping plate 5 to move forward or backward through the connecting plate 704, the cross guide rod 703, the moving seat 701, the spring 702 and the return seat 7 in turn, and the L-shaped overlapping plate 5 drives the U-shaped block 602 to move forward and backward through the fixing sleeve 6 and the electric push rod 601 in turn to adjust and align. After alignment, the electric telescopic rod 203 is closed, and the electric hoist hoist 1 is used to lift the second gangway plate 4 and the L-shaped overlapping plate 5 through its own steel wire. The rope 101 lowers the first gangway board 2, and the T-shaped slider 103 can slide vertically in the corresponding gangway sliding guide rail 102 to realize vertical guidance of the first gangway board 2. When the first gangway board 2 moves downward, it drives the L-shaped lap plate 5 to move downward through the rectangular sliding sleeve 3 and the second gangway board 4 in turn, and the L-shaped lap plate 5 drives the abutment rotating drum 501 downward to abut against the top of the hull 400 for overlapping work. The L-shaped lap plate 5 drives the U-shaped clamping block 602 downward to clamp on the outside of the circular clamping roller 8 through the fixing sleeve 6 and the electric push rod 601 in turn. After the overlapping is completed, personnel can pass from the hull to the L-shaped lap plate 5, the second gangway board 4, the rectangular sliding sleeve 3 and the first gangway board 2 in turn;

[0051] When the U-shaped clamping block 602 is clamped on the outside of the circular clamping roller 8, the personnel can continue to release a part of the wire hoist rope 101 through the electric hoist hoist 1, so as to reserve a little travel for the first gangway board 2 to move downward, and utilize the gravity of the L-shaped lap plate 5, the second gangway board 4, the rectangular sliding sleeve 3 and the first gangway board 2 to abut against the top of the hull 400. When the hull 400 floats or sinks, the weight of the upper lap structure will drive the upper lap structure to move up and down as a whole to perform automatic up and down compensation, so as to prevent the two from being squeezed or collided, and also ensure the maintenance of the clamping state, so as to achieve the effect of adaptive up and down integrated movement compensation of the lap structure when the hull 400 floats or sinks;

[0052] In addition, when the U-shaped clamping block 602 is clamped on the outer side of the circular clamping roller 8, the L-shaped lap plate 5 can be temporarily integrated with the hull 400. When the hull 400 is slightly swung back and forth by the waves of the water body, the L-shaped lap plate 5 and the second gangway plate 4 will be driven to swing back and forth in an integrated manner through the U-shaped clamping block 602, the vertical guide rod 603 and the fixing sleeve 6 in sequence, so that the swing amplitude is consistent with that of the hull 400. The second gangway plate 4 drives the return seat 7 to slide back and forth on the two transverse guide rods 703, and stretches or compresses the multiple springs 702. The elastic support of the springs 702 can provide the second gangway plate 4 and the L-shaped lap plate 5 with a swingable position back and forth. The space for movement is provided to ensure the stable forward and backward swing compensation work, so that when the hull 400 is swung forward and backward by the waves of the water body, the L-shaped lap plate 5 and the second gangway plate 4 are driven by the clamping to move in an integrated manner for compensation work, so as to achieve the effect of stable adaptive forward and backward movement accurate compensation of the lap joint structure to ensure the consistency with the forward and backward movement of the hull 400, and the consistent forward and backward movement is used to form a relative static effect, so as to prevent the relative movement from causing a hard collision between the feet and the L-shaped lap plate 5 when people climb and cause injuries, so that it is convenient for people to climb safely and stably to the lap joint structures such as the second gangway plate 4 and the L-shaped lap plate 5, and improve the safety and stability of use;

[0053] When a person passes to the rectangular sliding sleeve 3, the stepping plate 302 is stepped on, so that the downward squeezing force of the stepping plate 302 on the pressure sensor 303 increases. The pressure sensor 303 detects the squeezing force and transmits it to the PLC controller 202. When the pressure value exceeds the preset value, the PLC controller 202 controls the electric push rod 601 to start in reverse, so that it drives the U-shaped card block 602 to separate from the circular card roller 8 for timely release. By detecting the increase in pressure value, it is judged that the person has completed climbing and automatically releases the card, thereby enhancing the degree of automation. By utilizing the card release and separation, the vehicle is no longer pulled forward and backward by the hull 400, and the front and rear swing compensation work is gradually stopped, so as to facilitate the personnel to continue to pass through. After the personnel pass through the first gangway board 2, the electric hoist hoist 1 is used to lift the first gangway board 2 to the side of the gangway platform 300, and then the personnel can climb to the gangway platform 300 and then pass to the offshore platform; when it is used again later, the personnel use the external remote control to control the second wireless remote control switch to control the electric push rod 601 to start forward, and drive the U-shaped block 602 to move back downward to reset.

[0054] Embodiment 2

[0055] like Figures 6 to 11 As shown, this embodiment is based on the embodiment one, and its difference from the embodiment one is that the front side of the second gangway plate 4 can also be disconnected from the L-shaped lap plate 5 and set to an arc structure, and a flip driving component electrically connected to the PLC controller 202 and the lithium battery 201 is installed between the second gangway plate 4 and the L-shaped lap plate 5. When the pressure value received by the PLC controller 202 increases to exceed the preset value, the flip driving component is controlled by the PLC controller 202 to automatically drive the L-shaped lap plate 5 to flip upward for folding and front shielding. The flip driving component includes a rotating shaft 9, and a mounting hole 901 with an opening on the front side is opened on the top of the second gangway plate 4. The rotating shaft 9 is rotatably installed on the right inner wall of the mounting hole 901, wherein the right side of the rotating shaft 9 is fixedly connected to a supporting shaft, and a The bearing, the inner ring of the bearing is fixedly mounted on the outer side of the support shaft, and the bearing and the support shaft are used to rotatably install the rotating shaft 9. A servo brake motor 905 whose output shaft is fixedly connected to the left end of the rotating shaft 9 is fixedly installed on the left side of the second gangway plate 4. A connecting seat 903 is fixedly connected between the front side of the rotating shaft 9 and the rear side of the L-shaped lap plate 5. The same arc-shaped elastic shielding rubber pad 902 is bonded and fixed between the top front side of the second gangway plate 4 and the top rear side of the L-shaped lap plate 5. A U-shaped stopper 904 is fixedly connected to the bottom front side of the second gangway plate 4. The top front side of the U-shaped stopper 904 is in active contact with the bottom of the L-shaped lap plate 5. The servo brake motor 905 is electrically connected to the PLC controller 202 and the lithium battery 201. The bottom of the servo brake motor 905 is fixed and electrically connected to a third wireless remote control switch that cooperates with an external remote control.

[0056] This embodiment can automatically fold the front L-shaped overlapping plate 5 after a person climbs onto the overlapping structure to reduce the occupied space and enhance the front side protection effect, thereby improving the flexibility and safety of use.

[0057] The method of use of this embodiment is as follows: the difference from the first embodiment is that, under the premise that the front side of the second gangway plate 4 is not directly connected to the L-shaped lap plate 5, it also has the following effects;

[0058] When the pressure value received by the PLC controller 202 exceeds the preset value, the PLC controller 202 also controls the servo brake motor 905 to start in reverse, and the servo brake motor 905 drives the rotating shaft 9 to rotate in reverse. The rotating shaft 9 drives the L-shaped lap plate 5 to flip upward through the connecting seat 903 for folding and front shielding. The L-shaped lap plate 5 compresses the arc-shaped elastic shielding rubber pad 902, and the L-shaped lap plate 5 is automatically flipped upward after climbing, so as to achieve the effect of automatically folding the front L-shaped lap plate 5 after use. The upward folding is used to reduce the occupied space and enhance the front protection effect, thereby improving the flexibility and safety of use. When used again later, the personnel use the external remote control to control the third wireless remote control switch to control the servo brake motor 905 to start forward, and drive the L-shaped lap plate 5 to rotate forward and reset.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fore-and-aft wave motion compensation mechanism for a ladder for boarding personnel on an offshore platform, comprising a hull (400) docked in front of an offshore platform frame (100), a fore-and-aft wave motion compensation mechanism body of the boarding ladder fixed to the front side of the offshore platform frame (100), and a gangway platform (300), characterized in that: A plurality of rubber fenders (200) for mooring traffic boats are fixedly connected to the front side of the offshore platform fixing frame (100), and a circular clamping roller (8) is fixedly installed on the top rear side of the hull (400); The boarding ladder forward and backward wave motion compensation mechanism body comprises a first gangway plate (2) arranged in front of the offshore platform fixed frame (100), the first gangway plate (2) is located on the left side of the gangway platform (300), and a lifting vertical guide assembly is installed between the outer side of the offshore platform fixed frame (100) and the outer side of the first gangway plate (2); A rectangular sliding sleeve (3) is provided on the sliding sleeve of the first gangway plate (2), a second gangway plate (4) is fixedly provided inside the rectangular sliding sleeve (3), an L-shaped lap plate (5) is fixedly connected to the front side of the second gangway plate (4), a contact rotating drum (501) is rotatably installed at the bottom of the L-shaped lap plate (5) and is in active contact with the top of the hull (400), a PLC controller (202) is embedded at the rear side of the bottom of the first gangway plate (2), a clamping sleeve positioning component electrically connected to the PLC controller (202) is embedded at the bottom of the L-shaped lap plate (5), and the clamping sleeve positioning component is movably clamped on the outside of the circular clamping roller (8); A pressure detection component electrically connected to the PLC controller (202) is installed on the top of the rectangular sliding sleeve (3); An electric telescopic rod (203) electrically connected to a PLC controller (202) is embedded and fixed on the front side of the first gangway plate (2), and an adaptive elastic front-to-back motion compensation support component fixedly connected to the extended end of the electric telescopic rod (203) is embedded and fixed on the rear side of the second gangway plate (4).

2. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: The lifting vertical guide assembly comprises two gangway sliding guide rails (102) fixedly mounted on the front side of the offshore platform fixed frame (100) and symmetrically arranged. The adjacent sides of the two gangway sliding guide rails (102) are each provided with a T-shaped slide groove with an opening at the top. The sliding sleeve in the T-shaped slide groove is provided with a T-shaped slider (103). The adjacent sides of the two T-shaped sliders (103) are respectively fixedly connected to the two sides of the first gangway plate (2). The top of the offshore platform fixed frame (100) is fixedly mounted with an electric hoist hoist (1). The bottom end of the steel wire hoist rope (101) of the electric hoist hoist (1) is fixedly mounted on the top of the first gangway plate (2).

3. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: The clamping sleeve positioning assembly comprises a fixed sleeve (6) embedded and fixed at the bottom of the L-shaped lap plate (5); an electric push rod (601) electrically connected to the PLC controller (202) is fixedly installed on the top inner wall of the fixed sleeve (6); the protruding end of the electric push rod (601) is fixedly connected to a U-shaped clamping block (602); the U-shaped clamping block (602) is movably clamped on the outside of the circular clamping roller (8); the lower part of the front inner wall and the lower part of the rear inner wall of the U-shaped clamping block (602) are both arranged as arc structures; the top of the U-shaped clamping block (602) is rectangular and fixedly connected to four vertical guide rods (603); the fixed sleeve (6) is slidably sleeved on the four vertical guide rods (603).

4. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: The pressure detection assembly comprises a rectangular groove (301) provided at the top of a rectangular sliding sleeve (3); a stepping plate (302) is provided in the sliding sleeve inside the rectangular groove (301); a pressure sensor (303) electrically connected to a PLC controller (202) is fixedly installed between the bottom inner wall of the rectangular groove (301) and the bottom of the stepping plate (302); the bottom of the stepping plate (302) is rectangular and fixedly connected to four vertical guide shafts (304); and four vertical guide grooves (305) are provided on the bottom inner wall of the rectangular groove (301) and are respectively slidably connected to the outer sides of corresponding vertical guide shafts (304).

5. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: The adaptive elastic front-to-back motion compensation support assembly comprises a round seat (7) embedded and fixed on the rear side of the second gangway plate (4); a plurality of springs (702) are fixedly connected to the front inner wall of the round seat (7); the rear ends of the plurality of springs (702) are fixedly connected to the same moving seat (701); the rear side of the moving seat (701) is fixedly connected to two transverse guide rods (703); the rear ends of the two transverse guide rods (703) are slidably passed through the rear of the round seat (7) and are fixedly connected to the same connecting plate (704); the rear side of the connecting plate (704) is fixedly connected to the protruding end of the electric telescopic rod (203).

6. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 3, characterized in that: A first wireless remote control switch (204) is fixed and electrically connected to the left side of the electric telescopic rod (203), and a second wireless remote control switch is fixed and electrically connected to the right side of the electric push rod (601). The first wireless remote control switch (204) and the second wireless remote control switch are matched with the same external remote controller.

7. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 3, characterized in that: The bottom rear side of the first gangway plate (2) is provided with an embedding groove, a lithium battery (201) is fixedly mounted on the top inner wall of the embedding groove, a PLC controller (202) is fixedly mounted on the bottom of the lithium battery (201), and the PLC controller (202), the electric telescopic rod (203) and the electric push rod (601) are all electrically connected to the lithium battery (201).

8. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 1, characterized in that: A limiting groove (307) is provided on the bottom inner wall of the rectangular sliding sleeve (3), and an L-shaped limiting block (306) slidably connected to the limiting groove (307) is fixedly connected to the front bottom of the first gangway plate (2).

9. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 3, characterized in that: The bottom of the fixing sleeve (6) is provided with four guide grooves which are respectively slidably connected to the outer sides of the corresponding vertical guide rods (603).

10. The forward and backward wave motion compensation mechanism for offshore platform personnel boarding the gangway according to claim 7, characterized in that: The front side of the second gangway plate (4) can also be disconnected from the L-shaped lap plate (5) and set to an arc-shaped structure. A flip drive assembly electrically connected to the PLC controller (202) and the lithium battery (201) is installed between the second gangway plate (4) and the L-shaped lap plate (5). The flip drive assembly comprises a rotating shaft (9). The top of the second gangway plate (4) is provided with a mounting hole (901) with an opening on the front side. The rotating shaft (9) is rotatably mounted on the right inner wall of the mounting hole (901). A servo brake motor (905) whose output shaft is fixedly connected to the left end of the rotating shaft (9) is fixedly installed on the left side of the second gangway plate (4). The rotating shaft (9) is A connecting seat (903) is fixedly connected between the front side and the rear side of the L-shaped lap plate (5); a same arc-shaped elastic shielding rubber pad (902) is adhesively fixed between the top front side of the second gangway plate (4) and the top rear side of the L-shaped lap plate (5); a U-shaped stopper (904) is fixedly connected to the bottom front side of the second gangway plate (4); the top front side of the U-shaped stopper (904) is in active contact with the bottom of the L-shaped lap plate (5); the servo brake motor (905) is electrically connected to the PLC controller (202) and the lithium battery (201); and a third wireless remote control switch that cooperates with an external remote controller is fixed and electrically connected to the bottom of the servo brake motor (905).

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