Electric safety cover plate for second-layer passage opening below wharf platform

Abstract

The utility model relates to an electric safety cover plate for a second-layer channel opening under a wharf platform, and the electric safety cover plate comprises an electric supporting rod, a cover plate, a pedal starting switch, a button starting switch, an anti-pinch photoelectric limiting device, an audible and visual alarm, and a PLC control box, and the two ends of the electric supporting rod are respectively fixed on a parking platform and the channel opening cover plate through hinge seats; the side face of the platform cover plate is installed at a first-layer platform channel opening through a hinge, the pedal starting switch is arranged on the first-layer platform, the button starting switch is arranged on the second-layer platform, and the anti-pinch photoelectric limiting device is arranged at the channel opening. According to the scheme, the overall design structure is simple, operation is easy, the arrangement of electrical control elements is simplified through the design of the electric push rod, the safety of workers is improved through the automatic design of the channel cover plate, the channel cover plate adopts the design of the iron frame and the aluminum alloy anti-skid checkered plate, the self weight of the cover plate is reduced while the mechanical strength of the cover plate is guaranteed, and the system workload is reduced.

Description

Technical Field

[0001] The present application relates to an electric safety cover, in particular to an electric safety cover for a second-floor passageway under a dock platform, and belongs to the technical field of hydraulic structures on dock berths. Background Art

[0002] The finished product port operation center has 4 berths, and the total length of the wharf berth is 430 meters. The wharf platform is divided into the first and second floors. The height difference between the two platforms is more than 6 meters. There are 5 platform access openings and up and down escalators between the two platforms. During the low water level operation of the Yangtze River, operators often need to walk from the first floor platform to the second floor platform to carry out operations such as cable and boarding and disembarking. After the personnel pass through the first floor platform access opening, if the access opening is often open without protective measures, the relevant personnel on the first floor platform will be at risk of falling from the height of the hole when walking. In order to prevent such incidents from happening, there is an iron safety cover that can be opened manually at the platform access opening. This cover is heavy. When personnel pass through the first floor platform access opening, it is extremely inconvenient to lift the heavy cover while walking, which may also cause mechanical injuries such as squeezing. Regarding the use of the safety cover at the wharf berth platform access opening, a new technical solution is urgently needed to solve the above-mentioned on-site problems and create a safe and convenient way for the relevant personnel of the wharf to go up and down the first floor access opening. Summary of the invention

[0003] This application is aimed at the technical problems existing in the use of the existing first-floor platform channel cover, and provides an electric safety cover for the first-floor platform channel of the wharf. The technical solution is designed for the relevant personnel of the wharf to enter and exit the platform channel, according to the structural status of the channel and the functional requirements of the safety cover, and a safety cover device with electric opening, automatic closing and triple anti-pinch protection is designed. The main personnel of the device press the start switch of the first or second-floor platform, and the system PLC control box controls the electric support rod to rotate forward to open the channel cover. During the operation of the electric support rod, the sound and light alarm is used to remind the personnel entering and leaving; once the anti-pinch photoelectric limit of the channel detects the entry and exit of personnel, it works according to the state of the cover (open, running and closed), and restarts the timing in the open state, and automatically opens the cover again and restarts the timing in the running or closed state; after the cover is opened, the system automatically times, and reserves the time for the personnel to safely go up and down the escalator channel. When no personnel pass through within a certain period of time (timed by the anti-pinch photoelectric limit detection), the system automatically gives a reverse instruction to close the cover, and the electric support rod reverses to close the cover.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: an electric safety cover for the second-floor passageway under a dock platform, the electric safety cover comprising an electric strut, a cover, a foot-operated start switch, a button-operated start switch, an anti-pinch photoelectric limiter, an audible and visual alarm, and a PLC control box; the two ends of the electric strut are respectively fixed to the berth platform and the passageway cover by hinge seats; the side hinge of the platform cover is installed at the passageway of the first-floor platform; the anti-pinch photoelectric limiter is arranged at the passageway under the platform cover; and the audible and visual alarm is arranged on the PLC control box.

[0005] As an improvement of the present utility model, the PLC control box is composed of a power switch, a power module, a PLC module, and a contactor. The PLC module receives input signals of an external foot start, a button start switch, and an anti-pinch photoelectric limit according to a compiled control program, and outputs signals to the contactor according to the system function requirements, thereby controlling the operation of the electric support rod and the sound and light alarm to achieve the various functional requirements of the above-mentioned electric safety cover.

[0006] As an improvement of the present invention, the electric strut is an actuator for opening and closing the cover, and its two ends are respectively fixed to the berth platform and the passage cover through hinge seats; according to the stroke of the electric strut and the size parameters of the berth platform and the platform cover, the installation points of the hinge seats at both ends of the electric strut are set to ensure that the opening position of the cover is suitable for people going up and down the two-story platform (that is, the angle of rotation of the cover along the hinge is greater than 70 degrees); the electric strut has an automatic stop function in the event of overcurrent and overload in electrical control, ensuring that it stops working in time at both ends of the stroke and under abnormal conditions to prevent people from being pinched by the platform cover.

[0007] As an improvement of the utility model, the platform cover plate 2 is designed as a steel frame structure, and a non-slip aluminum alloy panel is laid on the surface. The panel must have a certain strength to prevent the risk of falling from the height of the hole when walking, and must be light in weight to be suitable for the working thrust of the electric strut. The side hinge of the platform cover plate is installed at the first-layer platform passageway, and the hinge is installed at a suitable position in the lower middle part of the platform cover plate (the hinge installation point set by the above-mentioned electric strut stroke parameter) to connect with the electric strut 1. The electric strut is opened and closed, thereby controlling the platform cover plate to rotate along the hinge from 0 degrees to more than 70 degrees, so as to facilitate people to go up and down from the first-layer passageway.

[0008] As an improvement of the utility model, the start switch is provided one on each of the first-layer platform and the second-layer platform. The first-layer platform is designed as a foot-operated start switch 3 and the second-layer platform is designed as a button-operated start switch 7. The different settings of the two switches conform to ergonomics, that is, a person can easily open the platform cover 2 by stepping on the switch or pressing the button to give the PLC control box 4 a door opening signal.

[0009] As an improvement of the present utility model, the anti-pinch photoelectric limit 6 is a laser sensing switch, which is located at key positions above and below the passage opening. When the detection personnel pass through, the anti-pinch photoelectric limit laser is blocked, and a signal to open the cover is given to the system PLC control box 4, thereby reducing the safety risk of personnel being accidentally pinched when the cover is closed. At the same time, when a person passes through the passage opening of a first-layer platform normally, the photoelectric limit gives a re-timing signal to the PLC control system to ensure that the electric support rod 1 and the platform cover 2 are in an open state for a certain period of time.

[0010] As an improvement of the present invention, the sound and light alarm 5 emits a sound and light alarm synchronously during the opening or closing process of the platform cover 2 (the electric support rod 1 is working), reminding the surrounding personnel that the cover is rotating, thereby reducing the safety risk of people being accidentally pinched when the cover is closed.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. Press the manual button (foot switch) to start the electric push rod to lift the cover and open the door; the first-floor platform uses a foot switch and the second-floor platform uses a button switch, which is ergonomically designed and can easily open the channel cover without bending over;

[0013] 2. Anti-pinch design for personnel entering and exiting

[0014] 2.1 An infrared photoelectric detection switch is set under the cover. At any time, as long as the infrared photoelectric detection switch is triggered, the electric door will receive an opening command. Through PLC program compilation, the system's door opening state retention time starts from zero to avoid the triggering of automatic door closing commands.

[0015] 2.2 The selection of electric push rods should match a certain speed and thrust according to the weight of the cover plate, and a push rod protection module should be set. If the door closing encounters too much resistance, the push rod will automatically stop when there is overcurrent or overload.

[0016] 2.3 During the process of opening or closing the door, set the sound and light alarm to sound simultaneously, standardize the timing of entering and exiting the passage, and guide people to enter and exit safely.

[0017] 3. The channel cover adopts an electric automatic opening and closing door design. After people enter and exit the channel, the system automatically times and the channel cover automatically closes, changing the original method of manually opening and closing the channel cover when people enter and exit, avoiding the unsafe state of the first-floor entrance being open for a long time.

[0018] 4. When designing and selecting the electric push rod, the working stroke of the push rod is calculated based on parameters such as the cover size, the opening angle, and the installation position of the support seats at both ends of the push rod. The working time of the push rod is controlled by program time, and the push rod itself has an automatic stop function at both ends, which simplifies the configuration of electrical control components.

[0019] 5. The channel cover adopts an iron frame and aluminum alloy anti-slip patterned plate design to ensure the mechanical strength of the cover while reducing the cover's own weight and reducing the system's workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the layout diagram of the electric safety cover equipment of the utility model;

[0021] Figure 2 This is the electrical control principle diagram of the electric safety cover of the utility model.

[0022] In the figure: 1. Electric support rod, 2. Platform cover, 3. Foot start switch, 4. PLC control box, 5. Sound and light alarm, 6. Anti-pinch photoelectric limit, 7. Push button start switch. DETAILED DESCRIPTION

[0023] In order to deepen the understanding of the present invention, the present embodiment is described in detail below with reference to the accompanying drawings.

[0024] Example 1: See Figure 1 , Figure 2 An electric safety cover for the first floor platform channel of a dock, the electric safety cover includes an electric support rod 1, a cover 2, a foot start switch 3, a button start switch 7, an anti-pinch photoelectric limit 6, an audible and visual alarm 5 and a PLC control box 4,

[0025] The PLC control box 4 is composed of a power switch, a power module, a PLC module, a contactor, etc. Figure 2 The electrical control schematic diagram of the electric safety cover, the PLC module receives the input signals of the external foot start switch 3, the button start switch 7, and the anti-pinch photoelectric limit 6 according to the compiled control program, and outputs the signal to the contactor according to the system function requirements, thereby controlling the operation of the electric support rod 1 and the sound and light alarm 5 to realize the various functional requirements of the above-mentioned electric safety cover.

[0026] The electric strut 1 is the actuator for opening and closing the cover, and its two ends are fixed to the berth platform and the passage cover respectively through hinge seats; according to the stroke of the electric strut and the size parameters of the berth platform and the platform cover 2, the installation points of the hinge seats at both ends of the electric strut are set to ensure that the opening position of the cover is suitable for people to go up and down the two-story platform (that is, the angle of rotation of the cover along the hinge is greater than 70 degrees); the electric strut also has an automatic stop function in the event of overcurrent and overload in electrical control, ensuring that it stops working in time at both ends of the stroke and under abnormal conditions to prevent people from being pinched by the platform cover.

[0027] The platform cover plate 2 is designed as a steel frame structure with a non-slip aluminum alloy panel on the surface. The panel should have a certain strength to prevent the risk of falling from the height of the hole when walking, and should be light enough to be suitable for the working thrust of the electric strut. The side hinge of the platform cover plate is installed at the first-layer platform passageway. The hinge is installed at a suitable position in the lower middle part of the platform cover plate (the hinge installation point set by the above electric strut travel parameter) to connect with the electric strut 1. The electric strut is opened and closed to control the platform cover plate to rotate along the hinge from 0 to more than 70 degrees, so as to facilitate people to go up and down from the first-layer passageway.

[0028] The start switch is set one on the first platform and one on the second platform. The first platform is designed as a foot-operated start switch 3 and the second platform is designed as a button-operated start switch 7. The different settings of the two switches conform to ergonomics, that is, a person can easily open the platform cover 2 by stepping on the switch or pressing the button to give the PLC control box 4 a door opening signal.

[0029] Among them, the anti-pinch photoelectric limit 6 is a laser sensing switch, which is located at key positions above and below the passage opening. When the detection personnel pass through, the anti-pinch photoelectric limit laser is blocked, and a signal to open the cover is given to the system PLC control box 4, thereby reducing the safety risk of personnel being accidentally pinched when the cover is closed. At the same time, when a person passes through the passage opening of the first-layer platform normally, the photoelectric limit gives a re-timing signal to the PLC control system to ensure that the electric support rod 1 and the platform cover 2 are in an open state for a certain period of time.

[0030] Among them, the sound and light alarm 5 emits a sound and light alarm synchronously when the platform cover 2 is opened or closed (the electric support rod 1 is working), reminding the surrounding personnel that the cover is rotating, thereby reducing the safety risk of people being accidentally pinched when the cover is closed.

[0031] Instructions for use of the electric safety cover: When personnel need to enter or exit the first-floor platform passageway, they step on the foot switch 3 on the first-floor platform or press the button 7 on the second-floor platform to give the PLC control box 4 a door opening signal. The corresponding contactor in the control box closes, controlling the electric support rod 1 to rotate forward and the sound and light alarm 5 to work simultaneously. The electric support rod props up the platform cover 2 to rotate along the hinge by more than 70 degrees, and the platform passageway door opens, allowing personnel to pass through the platform cover; when personnel pass by, the anti-pinch photoelectric limit 6 is blocked, giving the PLC control box 4 a cover opening signal and a re-timing signal to ensure that the electric support rod 1 and the platform cover 2 are in an open state within a certain (preset) time; when no personnel pass by within a certain (preset) time, the system automatically gives a cover closing electric support rod reversal instruction, and the electric support rod reverses to close the cover. This technical solution realizes a design of an electric safety cover for the wharf platform passageway, which is an electric safety cover for the wharf platform with electric cover opening, automatic cover closing, and triple anti-pinch protection.

[0032] It should be noted that the above embodiments are not intended to limit the protection scope of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions all fall within the protection scope of the claims of the present invention.

Claims

1. An electric safety cover for the second-floor passageway under a dock platform, characterized in that: The electric safety cover includes an electric support rod, a cover, a foot-operated start switch, a push-button start switch, an anti-pinch photoelectric limiter, an audible and visual alarm, and a PLC control box. The two ends of the electric support rod are respectively fixed to the berth platform and the passage cover through hinge seats. The side hinges of the platform cover are installed on the passage opening of the first-layer platform. The foot-operated start switch is arranged on the first-layer platform, the push-button start switch is arranged on the second-layer platform, the anti-pinch photoelectric limiter is arranged at the passage opening below the platform cover, and the audible and visual alarm is arranged on the PLC control box.

2. The electric safety cover for the lower second-floor passage of the dock platform according to claim 1 is characterized in that: The PLC control box is composed of a power switch, a power module, a PLC module, and a contactor. The PLC module receives input signals from external foot start, button start switch, and anti-pinch photoelectric limit according to the compiled control program, outputs signals to the contactor according to the system function requirements, controls the operation of the electric support rod and the sound and light alarm, and realizes the various functional requirements of the electric safety cover.

3. The electric safety cover for the lower second-floor passage of the dock platform according to claim 1 is characterized in that: The electric support rod is the actuator for opening and closing the cover. The electric support rod has the function of automatically stopping when there is overcurrent or overload in electrical control.

4. The electric safety cover for the lower second-floor passage of the dock platform according to claim 1 is characterized in that: in, The platform cover is designed as a steel frame structure with a layer of anti-slip aluminum alloy panel on the surface. The side hinges of the platform cover are installed at the first-layer platform passage opening. The hinges and electric struts are installed at a suitable position in the lower middle part of the platform cover to connect the platform cover. The electric struts are opened and closed to control the platform cover to rotate along the hinge from 0 degrees to more than 70 degrees, making it convenient for people to go up and down from the first-layer passage opening.

5. The electric safety cover for the lower second-floor passage of the dock platform according to claim 1 is characterized in that: The anti-pinch photoelectric limit switch is a laser sensing switch. At the passage opening under the platform cover, when the inspector passes through, the anti-pinch photoelectric limit laser is blocked, giving the system PLC control box a signal to open the cover.

6. The electric safety cover for the lower second-floor passage of the dock platform according to claim 1 is characterized in that: The sound and light alarm synchronously sends out sound and light alarms during the opening or closing process of the platform cover to remind surrounding personnel that the cover is rotating, thereby reducing the safety risk of personnel being accidentally pinched and injured when the cover is closed.

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