Construction hoist and its redundant protection control system

Abstract

The application belongs to the field of engineering construction equipment, and particularly relates to a construction hoist and a redundant protection control system thereof. The redundant protection control system comprises a lifting limiting bumping iron assembly and a lifting limiting switch assembly. The lifting limiting bumping iron assembly is arranged on a guide rail frame device, and the lifting limiting switch assembly is arranged on a lifting driving device or a cage system and is used for triggering cooperation with the lifting limiting bumping iron assembly to realize deceleration and stop of the lifting driving device. The construction hoist comprises a controller used for controlling the lifting driving device. The controller is used for controlling the lifting driving device to drive the cage system to ascend or descend along the guide rail frame device. However, if the controller fails, the cage system may lose control. In the application, the lifting limiting switch assembly and the lifting limiting bumping iron assembly are used to realize deceleration and stop of the cage system, so as to increase a redundant control mode of the lifting driving device except the controller, thereby avoiding safety accidents when the controller fails.

Description

Technical Field

[0001] This application pertains to engineering construction equipment, specifically relating to a construction hoist and its redundant protection control system. Background Technology

[0002] Construction hoists are essential specialized equipment for transporting personnel and materials to higher levels on construction sites. A construction hoist consists of a guide rail section, a drive section, and a cage section. The drive section works in conjunction with the guide rail section to move the cage section up and down. During the lifting and lowering of the cage section, a controller is required to control the drive section in real time to accelerate, decelerate, and stop the cage section, thus enabling the transport of personnel and materials. However, if the controller malfunctions, the cage section may become uncontrollable, leading to a safety accident. Utility Model Content

[0003] The purpose of this application is to provide a construction hoist and its redundant protection control system, which aims to increase the redundant control of the drive unit to avoid safety accidents.

[0004] To achieve the above objectives, this application provides a redundant protection control system for a construction hoist. The construction hoist includes a guide rail frame device, a lifting drive device, and a cage system. The lifting drive device is movably coupled to the guide rail frame device and connected to the cage system. The controller controls the operation of the lifting drive device. The redundant protection control system includes: The lifting limit contact assembly is mounted on the guide rail frame device; A lifting limit switch assembly is installed on the lifting drive device or the cage system and is used to cooperate with the lifting limit contact assembly to achieve deceleration and stopping of the lifting drive device.

[0005] In some embodiments, the lifting limit stop assembly includes an upper deceleration limit stop and a lower deceleration limit stop. The upper deceleration limit stop is arranged relatively close to the top of the guide rail frame device, and the lower deceleration limit stop is relatively close to the bottom of the guide rail frame device. The lifting limit switch assembly includes an upper deceleration limit switch arranged opposite to the upper deceleration limit stop and a lower deceleration limit switch arranged opposite to the lower deceleration limit stop. The upper deceleration limit stop and the upper deceleration limit switch trigger to reduce the rising speed of the lifting drive device, and the lower deceleration limit stop and the lower deceleration limit switch trigger to reduce the descending speed of the lifting drive device.

[0006] In some embodiments, the lifting limit stop assembly includes an upper limit stop and a lower limit stop. The upper limit stop is arranged above the upper deceleration limit stop, and the lower limit stop is arranged below the lower deceleration limit stop. The lifting limit switch assembly includes an upper limit switch arranged opposite to the upper limit stop and a lower limit switch arranged opposite to the lower limit stop. The upper limit stop and the upper limit switch trigger to stop the lifting drive device from rising, and the lower limit stop and the lower limit switch trigger to stop the lifting drive device from falling.

[0007] In some embodiments, the lifting limit stop assembly includes an upper limit stop and a lower limit stop, the upper limit stop being arranged above the upper limit stop and the lower limit stop being arranged below the lower limit stop. The lifting limit switch assembly includes an upper limit switch aligned with the upper limit stop and a lower limit switch aligned with the lower limit stop. The upper limit stop triggers the upper limit switch or the lower limit stop triggers the lower limit switch to cut off the power supply to the lifting drive device.

[0008] In some embodiments, the upper limit stop is located directly above the lower limit stop, and the upper limit switch and the lower limit switch are integrated into a limit switch, which is used to trigger the upper limit stop and the lower limit stop.

[0009] In some embodiments, the redundancy protection control system further includes an anti-collision sensor disposed on the lifting drive device. The anti-collision sensor is located above the drive connection between the lifting drive device and the guide rail device. Separation of the anti-collision sensor from the guide rail device can stop the lifting drive device from rising.

[0010] In some embodiments, the redundant protection control system further includes a ground-mounted shock-absorbing support, located below the cage system.

[0011] In some embodiments, the redundant protection control system further includes an anti-derailment structure disposed at the top of the guide rail frame device, the anti-derailment structure being in limiting cooperation with the lifting drive device.

[0012] In some embodiments, the lifting drive device and the guide rail frame device are driven by a rack and pinion mechanism, and the anti-derailment structure includes the portion of the guide rail frame device without a rack.

[0013] This application also provides a construction hoist, including a guide rail frame device, a lifting drive device, a cage system, and a redundant protection control system for the construction hoist as described above.

[0014] Through the above technical solution, the construction hoist and its redundant protection control system of this application have the following beneficial effects: The construction hoist includes a guide rail frame, a lifting drive device, and a cage system. The lifting drive device moves in coordination with the guide rail frame and is connected to the cage system. The controller controls the lifting drive device to drive the cage system to lift. If the controller malfunctions and the cage system gradually approaches the top or bottom of the guide rail frame, the lifting limit switch assembly and the lifting limit contact assembly will decelerate and stop the cage system, thereby increasing the redundancy control of the lifting drive device and thus avoiding the occurrence of safety accidents.

[0015] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram showing the position of the lifting limit contact assembly according to a specific embodiment of this application; Figure 2 This is a schematic diagram showing the position of the lifting limit switch assembly according to a specific embodiment of this application; Figure 3 This is a schematic diagram showing the positions of the upper deceleration limit stop, the upper limit stop, and the upper extreme limit stop according to a specific embodiment of this application; Figure 4 This is a schematic diagram showing the positions of the lower deceleration limit stop, the lower limit stop, and the lower extreme limit stop according to a specific embodiment of this application; Figure 5 This is a schematic diagram showing the contact between the anti-collision limit switch and the guide rail frame device according to a specific embodiment of this application; Figure 6 This is a schematic diagram showing the separation of the anti-collision limit switch and the guide rail frame device according to a specific embodiment of this application; Figure 7 This is a schematic diagram showing the position of the buffer damping spring according to a specific embodiment of this application.

[0017] Explanation of reference numerals in the attached figures 200. Guide rail bracket assembly; 21. Lifting drive rack; 24. Buffer and shock absorption spring; 25. Base frame 300. Lifting limit stop assembly; 31. Upper deceleration limit stop; 32. Upper limit stop; 33. Upper extreme limit stop; 34. Lower deceleration limit stop; 35. Lower limit stop; 36. Lower extreme limit stop; 400. Lifting drive device; 41. Lifting drive gear; 419. Anti-collision sensing element; 500. Cage system; 531. Lifting limit switch assembly. Detailed Implementation

[0018] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0019] The terminology of the construction hoist and its redundant protection control system according to this application is described below with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown in the figure, a specific embodiment of this application provides a redundant protection control system for a construction hoist. The construction hoist includes a guide rail frame device 200, a lifting drive device 400, and a cage system 500. The lifting drive device 400 is movably coupled with the guide rail frame device 200 and connected to the cage system 500. The controller controls the operation of the lifting drive device 400. The redundant protection control system includes a lifting limit contact assembly 300 and a lifting limit switch assembly 531. The lifting limit contact assembly 300 is disposed on the guide rail frame device 200. The lifting limit switch assembly 531 is disposed on the lifting drive device 400 or the cage system 500 and is used to trigger and cooperate with the lifting limit contact assembly 300 to realize the deceleration and stopping of the lifting drive device 400.

[0021] The construction hoist includes a controller for controlling the lifting drive device 400. The controller controls the lifting drive device 400 to drive the cage system 500 to rise and fall along the guide rail frame device 200, thereby realizing the function of carrying people and goods. However, if the controller fails, the cage system 500 may become uncontrollable. In this application, the lifting limit switch assembly 531 and the lifting limit contact assembly 300 are used to decelerate and stop the cage system 500, so as to increase the redundant control method of the lifting drive device 400 in addition to the controller, thereby avoiding safety accidents when the controller fails, and thus improving the safety of the construction hoist.

[0022] like Figure 3 and Figure 4In some embodiments, the lifting limit stop assembly 300 includes an upper deceleration limit stop 31 and a lower deceleration limit stop 34. The upper deceleration limit stop 31 is arranged relatively close to the top of the guide rail frame device 200, and the lower deceleration limit stop 34 is relatively close to the bottom of the guide rail frame device 200. The lifting limit switch assembly 531 includes an upper deceleration limit switch arranged opposite to the upper deceleration limit stop 31 and a lower deceleration limit switch arranged opposite to the lower deceleration limit stop 34. When the cage system 500 rises close to the top of the guide rail frame device 200 and has not decelerated properly to the speed set by the controller, the upper deceleration limit stop 31 and the upper deceleration limit switch are triggered to reduce the rising speed of the lifting drive device 400. When the cage system 500 descends close to the bottom of the guide rail frame device 200 and has not decelerated properly to the speed set by the controller, the lower deceleration limit stop 34 and the lower deceleration limit switch are triggered to reduce the descending speed of the lifting drive device 400.

[0023] like Figure 3 and Figure 4 In some embodiments, the lifting limit stop assembly 300 includes an upper limit stop 32 and a lower limit stop 35. The upper limit stop 32 is arranged above the upper deceleration limit stop 31, and the lower limit stop 35 is arranged below the lower deceleration limit stop 34. The lifting limit switch assembly 531 includes an upper limit switch arranged opposite to the upper limit stop 32 and a lower limit switch arranged opposite to the lower limit stop 35. When the cage system 500 rises close to the top of the guide rail device 200 and fails to stop normally, the upper limit stop 32 and the upper limit switch are triggered to stop the lifting drive device 400 from rising. When the cage system 500 descends close to the bottom of the guide rail device 200 and fails to stop normally, the lower limit stop 35 and the lower limit switch are triggered to stop the lifting drive device 400 from descending.

[0024] like Figure 3 and Figure 4In some embodiments, the lifting drive device 400 is electrically driven, and the lifting limit contact assembly 300 includes an upper limit contact 33 and a lower limit contact 36. The upper limit contact 33 is arranged above the upper limit contact 32, and the lower limit contact 36 is arranged below the lower limit contact 35. The lifting limit switch assembly 531 includes an upper limit switch arranged opposite to the upper limit contact 33 and a lower limit switch arranged opposite to the lower limit contact 36. When the hoisting cage system 500 rises close to the top of the guide rail device 200 and the upper limit stop 32 and the upper limit switch do not trigger properly, the upper limit stop 33 and the upper limit switch trigger to cut off the power supply to the lifting drive device 400; when the hoisting cage system 500 descends close to the bottom of the guide rail device 200 and the lower limit stop 35 and the lower limit switch do not trigger properly, the lower limit stop 35 and the lower limit switch trigger to cut off the power supply to the lifting drive device 400.

[0025] like Figure 5 and Figure 6 As shown, in some embodiments, the redundancy protection control system further includes an anti-collision sensor 419 disposed on the lifting drive device 400. The anti-collision sensor 419 is located above the drive connection between the lifting drive device 400 and the guide rail device 200. When the anti-collision sensor 419 is separated from the guide rail device 200, it can stop the lifting drive device 400 from rising.

[0026] Specifically, the anti-collision sensing element 419 is an anti-collision limit switch. The anti-collision limit switch is electrically connected to the power switch of the lifting drive device 400. When the sensing end of the anti-collision limit switch contacts the guide rail device 200, the lifting drive device 400 is powered on. When the sensing end of the anti-collision limit switch separates from the guide rail device 200, the power supply to the lifting drive device 400 is cut off, thereby stopping the lifting drive device 400 from continuing to rise.

[0027] Thus, the triggering coordination of the upper deceleration limit contact 31 and the upper deceleration limit switch, the triggering coordination of the lower deceleration limit contact 34 and the lower deceleration limit switch, the upper limit contact 32 and the upper limit switch, and the lower limit contact 35 and the lower limit switch together constitute the first redundant control method to prevent safety accidents after the controller of the lifting drive device 400 fails. The triggering coordination of the upper limit contact 33 and the upper limit switch, and the triggering coordination of the lower limit contact 36 and the lower limit switch together constitute the second redundant control method to prevent safety accidents after the controller of the lifting drive device 400 fails and the first redundant control method fails. The anti-collision sensor 419 is the third redundant control method to prevent safety accidents after the controller of the lifting drive device 400 fails and the second redundant control method fails. It can be seen that the multi-redundant control method provided in this application can significantly improve the reliability of the redundant control system, thereby improving the safety of the construction hoist.

[0028] In some embodiments, the redundant protection control system further includes an anti-derailment structure disposed at the top of the guide rail frame device 200, which cooperates with the lifting drive device 400 in a limiting manner. The anti-derailment structure provides mechanical protection for the guide rail frame device 200 against impact, thereby further improving the reliability of the redundant control system.

[0029] Specifically, the lifting drive device 400 and the guide rail device 200 are driven by a gear and rack. The guide rail device 200 includes a guide rail body and a lifting drive rack 21 installed on the guide rail body. The lifting drive device 400 includes a lifting drive gear 41 that meshes with the lifting drive rack 21. The anti-derailment structure includes the part of the guide rail body without a rack. The part without a rack is the top section of the guide rail body. When the gear of the lifting drive device 400 rises to the top section of the guide rail body, the lifting drive device 400 cannot continue to rise, thus stopping the cage system 500 from continuing to rise.

[0030] like Figure 7 As shown, in some embodiments, the guide rail frame device 200 also includes a base frame, the guide rail frame body is mounted on the base frame, and the redundant protection control system also includes a buffer and shock-absorbing bottom support set on the base frame and located below the cage system 500. The buffer and shock-absorbing bottom support provides mechanical structural protection for the guide rail frame device 200 against falling, thereby further improving the reliability of the redundant control system.

[0031] Specifically, the buffer and shock-absorbing support uses a buffer and shock-absorbing spring 24. When the cage system 500 descends and approaches the base frame, the buffer and shock-absorbing spring 24 decelerates the cage system 500.

[0032] In some embodiments, the upper limit stop 33 and the lower limit stop 36 are arranged on the same straight line extending in the vertical direction, and the upper limit switch and the lower limit switch are integrated into a single limit switch. The limit switch can be triggered and cooperate with the upper limit stop 33 and the lower limit stop 36 to reduce the number of components in the redundant control system.

[0033] In some implementations, the lifting limit switch assembly 531 is mounted on the cage system 500 and close to the top of the cage system 500, which facilitates more accurate determination of the position of the lifting limit contact assembly 300, thereby ensuring the reliability of the redundant control system.

[0034] A specific embodiment of this application also provides a construction hoist, including a guide rail frame device 200, a lifting drive device 400, a cage system 500, and a redundant protection control system. Since the construction hoist has all the embodiments of the aforementioned redundant protection control system, it possesses all the beneficial effects of a redundant protection control system.

[0035] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A redundant protection control system for a construction hoist, characterized in that, The construction hoist includes a controller, a guide rail assembly (200), a lifting drive device (400), and a cage system (500). The lifting drive device (400) is movably coupled with the guide rail assembly (200) and connected to the cage system (500). The controller controls the operation of the lifting drive device (400). The redundant protection control system includes: The lifting limit contact assembly (300) is mounted on the guide rail frame device (200); The lifting limit switch assembly (531) is disposed on the lifting drive device (400) or the cage system (500) and is used to cooperate with the lifting limit contact assembly (300) to achieve deceleration and stopping of the lifting drive device (400).

2. The redundancy protection control system according to claim 1, characterized in that, The lifting limit stop assembly (300) includes an upper deceleration limit stop (31) and a lower deceleration limit stop (34). The upper deceleration limit stop (31) is arranged relatively close to the top of the guide rail frame device (200), and the lower deceleration limit stop (34) is relatively close to the bottom of the guide rail frame device (200). The lifting limit switch assembly (531) includes an upper deceleration limit switch arranged opposite to the upper deceleration limit stop (31) and a lower deceleration limit switch arranged opposite to the lower deceleration limit stop (34). The upper deceleration limit stop (31) and the upper deceleration limit switch are triggered to reduce the rising speed of the lifting drive device (400), and the lower deceleration limit stop (34) and the lower deceleration limit switch are triggered to reduce the falling speed of the lifting drive device (400).

3. The redundancy protection control system according to claim 2, characterized in that, The lifting limit stop assembly (300) includes an upper limit stop (32) and a lower limit stop (35). The upper limit stop (32) is arranged above the upper deceleration limit stop (31), and the lower limit stop (35) is arranged below the lower deceleration limit stop (34). The lifting limit switch assembly (531) includes an upper limit switch arranged opposite to the upper limit stop (32) and a lower limit switch arranged opposite to the lower limit stop (35). The upper limit stop (32) and the upper limit switch are triggered to stop the lifting drive device (400) from rising, and the lower limit stop (35) and the lower limit switch are triggered to stop the lifting drive device (400) from falling.

4. The redundancy protection control system according to claim 3, characterized in that, The lifting limit contact assembly (300) includes an upper limit contact (33) and a lower limit contact (36). The upper limit contact (33) is arranged above the upper limit contact (32), and the lower limit contact (36) is arranged below the lower limit contact (35). The lifting limit switch assembly (531) includes an upper limit switch arranged opposite to the upper limit contact (33) and a lower limit switch arranged opposite to the lower limit contact (36). The upper limit contact (33) is triggered to engage with the upper limit switch, or the lower limit contact (35) is triggered to engage with the lower limit switch to cut off the power supply to the lifting drive device (400).

5. The redundancy protection control system according to claim 4, characterized in that, The upper limit stop (33) is located directly above the lower limit stop (36). The upper limit switch and the lower limit switch are integrated into a limit switch. The limit switch is used to trigger and cooperate with the upper limit stop (33) and the lower limit stop (36).

6. The redundancy protection control system according to claim 1, characterized in that, The redundant protection control system also includes an anti-collision sensor (419) disposed on the lifting drive device (400). The anti-collision sensor (419) is located above the drive connection between the lifting drive device (400) and the guide rail device (200). The anti-collision sensor (419) can stop the lifting drive device (400) from rising when it is separated from the guide rail device (200).

7. The redundancy protection control system according to claim 1, characterized in that, The redundant protection control system also includes a ground-mounted shock-absorbing support, which is located below the cage system (500).

8. The redundancy protection control system according to claim 1, characterized in that, The redundant protection control system also includes an anti-derailment structure installed at the top of the guide rail frame device (200), which is in a limiting cooperation with the lifting drive device (400).

9. The redundancy protection control system according to claim 8, characterized in that, The lifting drive device (400) and the guide rail device (200) are driven by a gear and rack, and the anti-derailment structure includes the part of the guide rail device (200) without a rack.

10. A construction hoist, characterized in that, It includes a guide rail frame device (200), a lifting drive device (400), a cage system (500), and a redundant protection control system for the construction hoist according to any one of claims 1 to 9.

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