Door control device for gantry crane of large machine equipment

Abstract

The utility model discloses a gate seat type crane access control device for large machine equipment, which relates to the technical field of access control devices, and comprises a pre-embedded plate, the left side and the right side of the upper part of the pre-embedded plate are provided with mutually corresponding induction type identification gates, and the front side of the surface of each induction type identification gate is fixedly provided with a rubber buffer pad; and a barrier plate is rotationally mounted in the middle groove body on the opposite side of the induction type identification gate machine through a driving piece. Compared with an existing common crane access control device, the large machine equipment gate seat type crane access control device has the advantages that the supporting rod is obliquely arranged, the first sliding block is used for limiting on the rear side of the moving groove, the supporting rod and the blocking plate jointly form a triangular shape, when the blocking plate is unfolded to be in a blocking state, auxiliary supporting can be effectively provided for the blocking plate, and the blocking plate is prevented from falling off; the front side collision impact is prevented, the stability of the blocking plate when the blocking channel is unfolded is greatly improved, and the safety is improved through cooperation of the arc-shaped groove, the fixing iron block and the electromagnetic fixing device.

Description

Technical Field

[0001] The utility model relates to the technical field of portal cranes, in particular to a door control device for portal cranes of large equipment. Background Art

[0002] Most gantry cranes run along crane tracks on the ground or in buildings to carry out lifting and loading and unloading operations. One side of the running track is on the ground, and the other side is on a building above the ground. Large cranes have more control space, which requires different departments and different technical operators to enter and operate together. In order to prevent outsiders and irrelevant personnel from entering the crane, access control is generally set at the entrance to prevent irrelevant personnel from entering.

[0003] The existing crane access control device includes barrier-type access control, swing-gate type access control and automatic opening and closing door panel type access control. The access control adopts the method of swiping work card or face fingerprint recognition to open the access. If the recognition does not match, the blocking door panel in the access control will not be opened to release, which can effectively prevent outsiders from entering the crane and causing damage to the crane. The barrier-type, swing-gate type and automatic opening and closing door panel type access control have blocking door panels that are all single movable panels. If they are hit from the front, the blocking door panels will rotate backwards, deform and be damaged. There is no support for the blocking panel, which makes it difficult for the blocking panel to stably, effectively and safely block the access control passage after it is unfolded. In addition, the existing access control system is prone to cause damage to pedestrians when opening or closing the door.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a door control device for a large-scale gantry crane is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a door access control device for a portal crane of large equipment to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The access control device of a portal crane for large equipment comprises an embedded plate, on which two corresponding inductive identification gates are arranged, and is characterized in that rubber buffer pads are fixedly installed on the front sides of the two inductive identification gates, blocking plates are rotatably installed in the middle grooves on the opposite sides of the two inductive identification gates, and a limiting mechanism is arranged on the surface of the blocking plate, and a movable groove is opened on the opposite sides of the two inductive identification gates, and a guide rod is fixedly installed in the movable groove, and a first slider is slidably arranged on the surface of the guide rod, and a support rod is rotatably arranged on one side of the first slider through a rotating shaft, and the front end of the support rod is rotatably connected to one side of the blocking plate.

[0008] As a further optimization: the limiting mechanism includes a through cavity opened in the middle of the front side of the blocking plate, and the inner top surface and the inner bottom surface of the through cavity are provided with sliding grooves, and second sliding blocks are slidably arranged in the two sliding grooves, and a moving seat is fixedly installed between the two second sliding blocks, and a pull rod is rotatably arranged on the front side of the moving seat, and the other end of the pull rod is rotatably connected to the middle groove body of the inductive identification gate.

[0009] As a further optimization: pressure sensor devices are provided on the front and rear sides of the blocking plate, a slide rail is provided inside the blocking plate, an electromagnetic fixing device is fixedly connected to the upper end of the slide rail, and the electromagnetic fixing device is electrically connected to the pressure sensor; a fixed iron piece is slidably provided inside the slide rail, a groove is provided at the lower part of the fixed iron piece, and two first V-shaped grooves are vertically provided on the two opposite walls of the groove along the height direction thereof; an outlet is provided at the lower part of the blocking plate below the groove, and the top surface of the fixed iron piece is adsorbed on the electromagnetic fixing device.

[0010] As a further optimization: the top surface of the embedded plate is also provided with an arc groove along the direction of the movement trajectory of the blocking plate away from the edge of the identification gate, and the arc groove includes a groove bottom plate, the groove bottom plate is tightly attached to the top surface of the embedded plate and fixed to the embedded plate, and the two ends of the groove bottom plate are respectively connected with a groove support plate in one piece, and the two groove support plates are arranged perpendicular to the top surface of the groove bottom plate and extend to one side away from the top surface of the groove bottom plate,

[0011] As a further optimization: a plurality of second V-shaped grooves are opened along the height direction of the side of the two groove support plates away from each other, and the plurality of second V-shaped grooves are arranged in parallel and at intervals on the side of the two groove support plates away from each other, the size of the first V-shaped groove is adapted to the size of the plurality of second V-shaped grooves, and the distance between the two opposite side walls of the groove is equal to the distance between the outer side walls of the two groove support plates of the arc groove.

[0012] As a further optimization: two grooves are symmetrically opened on the surface of the embedded plate, and a bidirectional screw is rotatably arranged on the inner surface of the two grooves, and the two ends of the bidirectional screw are respectively threadedly connected with an adjustment seat, the two adjustment seats are respectively located in the two grooves, and the upper ends of the two adjustment seats are respectively fixedly connected to the bottom ends of the two inductive identification gates, an inner cavity is provided in the embedded plate between the two grooves, a driving mechanism is provided in the inner cavity, and the driving mechanism is transmission-connected to the middle part of the bidirectional screw.

[0013] As a further optimization: a driven bevel gear is fixedly installed in the middle of the bidirectional screw, the driving mechanism includes a driving motor and an active bevel gear, the active bevel gear is fixedly connected to the output shaft of the driving motor, and the active bevel gear is meshed with the driven bevel gear.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model uses the rubber buffer pad, the blocking plate, the moving groove, the guide rod, the first slider and the support rod to protect the front side of the inductive identification gate from bumps and scratches. The support rod is obliquely arranged, and the first slider is used to limit the position at the rear side of the moving groove to form a triangular shape with the blocking plate. When the blocking plate is unfolded to block, it can effectively provide auxiliary support for the blocking plate to prevent the blocking plate from being damaged by the front collision and impact, which causes the blocking plate to flip backward and be forced to open the channel. The stability and safety of the blocking plate when it is unfolded to block the channel are greatly improved, and the blocking capacity is improved;

[0016] 2. The utility model adopts the arrangement of the limiting mechanism, the through cavity, the slide groove, the second slider, the moving seat and the pull rod. When the blocking plate is closed, it moves in an arc. Under the limit of the pull rod, the second slider moves to the left side under the push of the slide groove that moves with the blocking plate, driving the moving seat to move to the left end of the through cavity. Therefore, under the pulling force of the pull rod on the moving seat and the restriction of the through cavity on the moving seat, the maximum rotation position of the blocking plate can only be kept horizontal. When the blocking plate is hit, the stability of the blocking plate can be further improved to prevent the blocking plate from being forced to flip and be damaged.

[0017] 3. The utility model is provided with a sink groove, a two-way screw rod, an adjustment seat, a driven bevel gear, an active bevel gear and a driving motor. The driving motor can drive the active bevel gear to rotate, thereby engaging the driven bevel gear to rotate and causing the two-way screw rod to rotate. Under the sliding limit of the sink groove on the adjustment seat, the adjustment seat utilizes the thread pushing force between the two-way screw rod to move left and right, thereby driving the induction identification gate to move. The width of the access control channel can be flexibly adjusted according to the construction personnel carrying workpieces of different sizes to enter.

[0018] 4. The utility model uses a pressure sensor, an electromagnetic fixing device, a fixed iron block, a slide rail, a groove and an arc groove. The pressure sensor senses the state of the blocking plate, controls the electromagnetic fixing device to retract and release the fixed iron block, and the groove and the arc groove cooperate to realize the real-time start and stop of the blocking plate, which can protect the construction workers. When the construction workers hit the blocking plate, the blocking plate stops immediately to protect the safety of the construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the inductive identification gate of the utility model;

[0021] Figure 3 For the utility model Figure 2 Schematic diagram of the structure of part A;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the embedded plate of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the limiting mechanism of the utility model;

[0024] Figure 6 It is a side sectional view of the blocking plate 4 of the utility model;

[0025] Figure 7 For the utility model Figure 6 Schematic diagram of the structure of part B;

[0026] Figure 8 It is a side sectional view of the slide rail 101 of the utility model;

[0027] Fig. 9 It is a partial top view of the slide rail 101 of the utility model.

[0028] In the figure: 1-embedded plate, 2-inductive identification gate, 3-rubber buffer pad, 4-blocking plate, 41-plate limiting mechanism, 411-through cavity, 412-slide groove, 413-second slider, 414-moving seat, 415-pull rod, 421-electromagnetic fixing device, 422-fixed iron block, 423-slide rail, 424-exit, 425-groove, 426-first V-shaped groove, 101-arc groove, 102-groove bottom plate, 103-groove support plate, 104-second V-shaped groove, 5-moving groove, 6-guide rod, 7-first slider, 8-support rod, 9-sinking groove, 10-bidirectional screw rod, 11-adjusting seat, 12-driven bevel gear, 13-active bevel gear, 14-driving motor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figure 1-Figure 9As shown, the access control device of a portal crane of large equipment includes an embedded plate 1, and corresponding inductive identification gates 2 are arranged on the upper left and right sides of the embedded plate 1. A rubber buffer pad 3 is fixedly installed on the front side of the surface of the inductive identification gate 2, and a blocking plate 4 is rotatably installed in the middle groove body on the opposite side of the inductive identification gate 2 through a driving member. A movable groove 5 is opened at the rear of the opposite side of the surface of the inductive identification gate 2, and a guide rod 6 is fixedly installed on the inner surface of the movable groove 5. A first slider 7 is slidably arranged on the surface of the guide rod 6, and a support rod 8 is rotatably arranged on one side of the surface of the first slider 7 through a rotating shaft. The front end of the support rod 8 is rotatably connected to the rear side of the surface of the blocking plate 4 through a rotating shaft seat.

[0031] A limiting mechanism 41 is provided on the front side of the blocking plate 4, and the limiting mechanism 41 includes a through cavity 411 opened in the middle of the surface of the blocking plate 4, and the inner top surface and the inner bottom surface of the through cavity 411 are provided with sliding grooves 412, and the inner surfaces of the two sliding grooves 412 are slidably provided with second sliders 413, and a moving seat 414 is fixedly installed between the upper and lower second sliders 413, and a pull rod 415 is rotatably provided on the front side of the surface of the moving seat 414 through a rotating shaft, and the end of the pull rod 415 is rotatably connected to the inside of the groove of the inductive identification gate 2 through a bearing seat.

[0032] The embedded plate 1 is buried underground in the entrance space, and its surface is flush with the ground surface.

[0033] The rubber buffer pad 3 is located at the front side of the inductive identification gate 2 to protect the front side of the inductive identification gate 2 to prevent the workpiece from bumping and scratching the inductive identification gate 2 when a person carries a workpiece into the gate.

[0034] The first slider 7 can slide forward and backward through the guide rod 6. When the blocking plate 4 is folded to open the channel, the blocking plate 4 pulls the first slider 7 forward through the pulling force of the support rod 8, so that the blocking plate 4 can be smoothly folded and opened, avoiding the support rod 8 from being fixed in position, thereby limiting the situation where the blocking plate 4 cannot be rotated to open.

[0035] The blocking plate 4 is in an extended and blocked state, and the support rod 8 pushes the first slider 7 to move backward. The first slider 7 is limited by the rear end of the movable groove 5, and a triangular support shape is formed between the support rod 8 and the blocking plate 4, which can effectively provide auxiliary support for the blocking plate 4 and prevent the blocking plate 4 from being damaged by a front collision and impact, which causes the blocking plate 4 to flip backward and be forced to open the channel.

[0036] The shaft seat connecting the pull rod 415 and the inductive identification gate 2 has a lower height than the through cavity 411, that is, when the blocking plate 4 is closed, it can be just received into the through cavity 411, so that the blocking plate 4 can be completely opened. The blocking plate 4 moves in an arc when opening and closing, and can then pull the moving seat 414 in an arc to move under the limit of the pull rod 415. Under the pulling force of the pull rod 415 on the moving seat 414 and the limit of the through cavity 411 on the moving seat 414, the maximum rotation position of the blocking plate 4 can only be kept horizontal, and when the blocking plate 4 is hit, the stability of the blocking plate 4 can be further improved.

[0037] Pressure sensor devices are provided on both the front and rear sides of the blocking plate 4 .

[0038] A slide rail 423 is disposed inside the blocking plate 4 , and an electromagnetic fixing device 421 is fixedly connected to the upper end of the slide rail 423 . The electromagnetic fixing device 421 is electrically connected to the pressure sensor.

[0039] A fixed iron piece 422 is slidably disposed inside the slide rail 423 , a groove 425 is disposed at the lower portion of the fixed iron piece 422 , and two first V-shaped grooves 426 are vertically formed on two opposite walls of the groove 425 along the height direction thereof.

[0040] The lower part of the blocking plate 4 is located below the groove 425 and is provided with an outlet 424 that matches the size of the fixing iron piece 422 .

[0041] The top surface of the fixing iron piece 422 is adsorbed on the electromagnetic fixing device 421 .

[0042] The top surface of the embedded plate 1 is also provided with an arc groove 101 along the direction of the movement track of the blocking plate 4 away from the edge of the identification gate 2 .

[0043] The arc-shaped groove 101 includes a groove bottom plate 102 , and the groove bottom plate 102 is tightly attached to the top surface of the embedded plate 1 and fixedly connected to the embedded plate 1 .

[0044] Both ends of the trough bottom plate 102 are respectively integrally connected with trough support plates 103 . The two trough support plates 103 are arranged perpendicular to the top surface of the trough bottom plate 102 and extend to one side away from the top surface of the trough bottom plate 102 .

[0045] A plurality of second V-shaped grooves 104 are formed along the height direction of the side of the two groove support plates 103 away from each other. The plurality of second V-shaped grooves 104 are arranged in parallel and at intervals on the side of the two groove support plates 103 away from each other.

[0046] The first V-shaped groove 426 is adapted to the size of the plurality of second V-shaped grooves 104 , and the distance between the two opposite side walls of the groove 425 is equal to the distance between the outer side walls of the two groove support plates 103 of the arc groove 101 .

[0047] With this design, when in use, when the front and rear sides of the blocking plate 4 are subjected to pressure, the pressure sensor receives a signal and transmits it to the electromagnetic fixing device 421 inside the blocking plate 4. At this time, the electromagnetic fixing device 421 is powered off, and the fixed iron piece 422 loses its adsorption force and slides out of the blocking plate 4 through the cooperation of the slide rail 423 and the outlet 424, and then the lower part of the fixed iron piece 422 falls into the arc groove 101. At this time, the upper part of the fixed iron piece 422 is still in the slide rail 423. Due to the two first V-shaped grooves 426 on the inner wall of the groove 425 and the second V-shaped grooves on the outer sides of the two groove bottom plates 102, 104 are meshed with each other, and the lower end of the fixed iron piece 422 will be stuck in the arc groove 101 and cannot move along the length direction of the arc groove 101. When the blocking plate 4 wants to continue to move, it cannot continue to move due to the action of the fixed iron piece 422, thereby protecting pedestrians. When the pedestrian walks away, the pressure sensor device loses pressure and transmits a signal to the electromagnetic fixing device 421. The electromagnetic fixing device 421 is energized and then absorbs the fixed iron piece 422. The fixed iron piece 422 returns to the inside of the blocking plate 4 through the slide rail 423, and the blocking plate 4 continues to work. The structure is simple and easy to use.

[0048] Grooves 9 are provided on both sides above the surface of the embedded plate 1, and a bidirectional screw rod 10 is horizontally penetrated through the inner surface of the groove 9. The bidirectional screw rod 10 is rotatably arranged in the groove 9 through a bearing. The left and right ends of the surface of the bidirectional screw rod 10 are connected with adjustment seats 11 through threads, and the upper end of the adjustment seat 11 is fixedly connected to the bottom end of the inductive identification gate 2. The middle part of the surface of the bidirectional screw rod 10 is located in the cavity of the embedded plate 1, and a driven bevel gear 12 is fixedly installed, and a driving bevel gear 13 is meshed on the rear side of the surface of the driven bevel gear 12. The rear side of the surface of the driving bevel gear 13 is connected with a drive motor 14 through a transmission rod, and the drive motor 14 is fixedly arranged in the middle rear cavity of the embedded plate 1.

[0049] The driving bevel gear 13 is rotated by the driving motor 14 , and the driving bevel gear 13 is meshed with the driven bevel gear 12 , so that the bidirectional screw rod 10 can be rotated when the driving motor 14 is working.

[0050] The inner surface of the groove 9 is slidably fitted with the adjustment seat 11, and the adjustment seat 11 is threadedly connected to the bidirectional screw rod 10. When the bidirectional screw rod 10 rotates, the groove 9 restricts the adjustment seat 11 from rotating with the bidirectional screw rod 10, so that the adjustment seat 11 can only move left and right due to the thread pushing force of the bidirectional screw rod 10.

[0051] The upper end of the adjustment seat 11 is fixed to the inductive identification gate 2 . When the adjustment seat 11 moves, the inductive identification gate 2 will move synchronously, thereby being able to adjust the distance between the channels between the inductive identification gates 2 .

[0052] Working principle: When using the access control device of the portal crane of the large equipment, first, the person enters the middle channel of the inductive identification gate 2 on both sides, and verifies by swiping a card or face recognition. After the verification is successful, the blocking plate 4 rotates forward to open the middle channel for manual entry. At this time, the blocking plate 4 will push the pull rod 415 to converge to the inside of the inductive identification gate 2, and push the moving seat 414 forward. When the person enters the channel, the rubber buffer pad 3 protects the front side of the inductive identification gate 2 to prevent the workpiece carried by the person from bumping and scratching the machine body. According to the size of the workpiece carried by the person, the driving motor 14 can drive the active bevel gear 13 to rotate, thereby engaging the driven bevel gear 12 to rotate, so that the bidirectional screw 10 rotates, and the sink 9 adjusts the seat 11. Under the fitting sliding limit, the adjusting seat 11 utilizes the threaded pushing force between it and the bidirectional screw rod 10 to move left and right, thereby driving the inductive identification gate machine 2 to move and adjust the width of the channel. After smooth manual entry, the blocking plate 4 is reset and expanded to reclose the channel. The support rod 8 is obliquely set, and the first slider 7 is used to limit the rear side of the moving groove 5 to form a triangular shape together with the blocking plate 4. When the blocking plate 4 is expanded to a blocking state, it can effectively provide auxiliary support for the blocking plate 4 to prevent the blocking plate 4 from flipping backward and being forced to open the channel and being damaged by a collision and impact from the front side. At the same time, when closing, the blocking plate 4 moves in an arc motion. Under the limit of the pull rod 415, the second slider 413 follows the blocking plate 4, it will move to the left side under the push of the slide groove 412 moving together, driving the moving seat 414 to move to the left end of the through cavity 411, so that under the pulling force of the pull rod 415 on the moving seat 414 and the restriction of the through cavity 411 on the moving seat 414, the maximum rotation position of the blocking plate 4 can only be kept horizontal, and when the blocking plate 4 is hit, the stability of the blocking plate 4 can be further improved. Moreover, when the front and rear sides of the blocking plate 4 are subjected to pressure, the pressure sensor receives a signal and transmits it to the electromagnetic fixing device 421 inside the blocking plate 4. At this time, the electromagnetic fixing device 421 is powered off, and the fixed iron piece 422 loses its adsorption force and slides out of the blocking plate 4 through the cooperation of the slide rail 423 and the outlet 424, and then the lower part of the fixed iron piece 422 falls into the arc groove 101. At this time, the upper part of the fixed iron piece 422 is still in the slide rail 423. Due to the mutual engagement of the two first V-shaped grooves 426 on the inner wall of the groove 425 and the second V-shaped grooves 104 on the outer sides of the two groove bottom plates 102, the lower end of the fixed iron piece 422 will be stuck in the arc groove 101 and cannot move along the length direction of the arc groove 101. When the blocking plate 4 wants to continue to move, it cannot continue to move due to the action of the fixed iron piece 422, which plays a role in protecting pedestrians. When the pedestrian walks away, the pressure sensor device loses pressure and transmits a signal to the electromagnetic fixing device 421. The electromagnetic fixing device 421 is energized and then absorbs the fixed iron piece 422. The fixed iron piece 422 returns to the inside of the blocking plate 4 through the slide rail 423, and the blocking plate 4 continues to work. The structure is simple and easy to use.This is the working principle of the access control device of the portal crane of this large equipment.

Claims

1. A portal crane access control device for large equipment, comprising an embedded plate (1), on which two corresponding inductive identification gates (2) are arranged, characterized in that: A rubber buffer pad (3) is fixedly installed on the front side of the two inductive identification gates (2), a blocking plate (4) is rotatably installed in the middle groove body on the opposite side of the two inductive identification gates (2), and a limiting mechanism (41) is arranged on the surface of the blocking plate (4), and a movable groove (5) is opened on the opposite side of the two inductive identification gates (2), a guide rod (6) is fixedly installed in the movable groove (5), and a first slider (7) is slidably arranged on the surface of the guide rod (6), and a support rod (8) is rotatably arranged on one side of the first slider (7) through a rotating shaft, and the front end of the support rod (8) is rotatably connected to one side of the blocking plate (4).

2. The access control device for a large machine portal crane according to claim 1 is characterized in that: The limiting mechanism (41) comprises a through cavity (411) provided in the middle of the front side of the blocking plate (4), the inner top surface and the inner bottom surface of the through cavity (411) are provided with a slide groove (412), a second slider (413) is slidably provided in the two slide grooves (412), a moving seat (414) is fixedly installed between the two second sliders (413), a pull rod (415) is rotatably provided on the front side of the moving seat (414), and the other end of the pull rod (415) is rotatably connected to the middle groove body of the inductive identification gate (2).

3. The access control device for a large machine portal crane according to claim 1 is characterized in that: Pressure sensor devices are provided on both the front and rear sides of the blocking plate (4); a slide rail (423) is provided inside the blocking plate (4); an electromagnetic fixing device (421) is fixedly connected to the upper end of the slide rail (423); the electromagnetic fixing device (421) is electrically connected to the pressure sensor; a fixed iron piece (422) is slidably provided inside the slide rail (423); a groove (425) is provided at the lower part of the fixed iron piece (422); two first V-shaped grooves (426) are vertically provided on two opposite walls of the groove (425) along the height direction thereof; an outlet (424) is provided at the lower part of the blocking plate (4) below the groove (425); and the top surface of the fixed iron piece (422) is adsorbed on the electromagnetic fixing device (421).

4. The access control device for a portal crane of large equipment according to claim 3 is characterized in that: The top surface of the embedded plate (1) is also provided with an arc-shaped groove (101) along the direction of the movement trajectory of the blocking plate (4) away from the edge of the identification gate (2); the arc-shaped groove (101) comprises a groove bottom plate (102); the groove bottom plate (102) is tightly attached to the top surface of the embedded plate (1) and is fixed to the embedded plate (1); both ends of the groove bottom plate (102) are respectively integrally connected with groove support plates (103); the two groove support plates (103) are arranged perpendicular to the top surface of the groove bottom plate (102) and extend to a side away from the top surface of the groove bottom plate (102).

5. The access control device for a large machine portal crane according to claim 4 is characterized in that: A plurality of second V-shaped grooves (104) are provided along the height direction of the side of the two groove support plates (103) that is away from each other. The plurality of second V-shaped grooves (104) are arranged in parallel and at intervals on the side of the two groove support plates (103) that is away from each other. The size of the first V-shaped groove (426) is compatible with the size of the plurality of second V-shaped grooves (104). The distance between the two opposite side walls of the groove (425) is equal to the distance between the outer side walls of the two groove support plates (103) of the arc groove (101).

6. The access control device for a large machine portal crane according to claim 1 is characterized in that: The surface of the embedded plate (1) is symmetrically provided with two sink grooves (9), the inner surfaces of the two sink grooves (9) are rotatably provided with bidirectional screw rods (10), both ends of the bidirectional screw rods (10) are respectively threadedly connected with adjustment seats (11), the two adjustment seats (11) are respectively located in the two sink grooves (9), and the upper ends of the two adjustment seats (11) are respectively fixedly connected to the bottom ends of the two inductive identification gates (2), an inner cavity is provided in the embedded plate (1) at a position between the two sink grooves (9), a driving mechanism is provided in the inner cavity, and the driving mechanism is drivingly connected to the middle part of the bidirectional screw rod (10).

7. The access control device for a large machine portal crane according to claim 6 is characterized in that: A driven bevel gear (12) is fixedly mounted in the middle of the bidirectional screw rod (10); the driving mechanism comprises a driving motor (14) and a driving bevel gear (13); the driving bevel gear (13) is fixedly connected to an output shaft of the driving motor (14); and the driving bevel gear (13) is meshed with the driven bevel gear (12).

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