A construction hoist with separate control and load limiting device for people and goods

Abstract

The present invention discloses a construction elevator load-limiting device for controlling passengers and cargo separately, comprising a weight sensor, a double-control switch electrically connected to the weight sensor, a load-limiting device for objects electrically connected to the double-control switch, and a load-limiting device for people; the load-limiting device for objects comprises a first signal converter, a first signal amplifier electrically connected to the first signal converter, a first comparator electrically connected to the first signal amplifier, and a first digital display, a first relay electrically connected to the first digital display, and a first sound and light display alarm; the load-limiting device for people comprises a second signal converter, a second signal amplifier electrically connected to the second signal converter, a second comparator electrically connected to the second signal amplifier, and a second digital display, a second relay electrically connected to the second digital display, and a second sound and light display alarm. The present invention provides a load-limiting device for controlling passengers and cargo separately, thereby improving the use safety of the construction elevator and greatly reducing the safety management risk of the construction elevator.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a separate control load limiting device for people and goods of a construction elevator. Background Art

[0002] As vertical transportation equipment, construction elevators play a vital role in the construction of construction projects. At present, the safety management of large-scale construction machinery is very severe, especially for construction elevators, which are necessary means of transportation for people and goods at construction sites. If they are not managed carefully, such as overloading or overcrowding, it is very easy to cause a particularly serious safety accident, which will bring huge economic losses and adverse social impacts to the company. An accident in which 10 or more people die at a construction site is a particularly serious safety accident. In order to avoid this level of accident, the relevant departments stipulate that the construction elevator must be limited to 9 people, that is, 8 passengers plus 1 driver. Under the normal transportation of operating personnel, 10 people are transported. Assuming that each person weighs 100kg, a total of 1000kg, and the construction elevator is limited to 2000kg, which is far from the weight overload condition. At this time, the load limit device will not be triggered and it can still operate normally, but the actual number of people has exceeded the limit. At this time, it depends entirely on the driver to control the number of passengers. Due to the low quality of the operating personnel, it is very easy to cause overcrowding during rush hours, which poses a major safety hazard. Summary of the invention

[0003] The purpose of the present invention is to provide a construction hoist with a separate control and load limiting device for people and goods.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme: a construction elevator load limit device for separate control of people and goods, including a weight sensor, a double-control switch electrically connected to the weight sensor, a load limit device for objects and a load limit device for people electrically connected to the double-control switch; the load limit device for objects includes a first signal converter electrically connected to the double-control switch, a first signal amplifier electrically connected to the first signal converter, a first comparator and a first digital display electrically connected to the first signal amplifier, a first relay and a first sound and light display alarm electrically connected to the first digital display; the load limit device for people includes a second signal converter electrically connected to the double-control switch, a second signal amplifier electrically connected to the second signal converter, a second comparator and a second digital display electrically connected to the second signal amplifier, a second relay and a second sound and light display alarm electrically connected to the second digital display.

[0005] Furthermore, the first comparator is connected in parallel with the first digital display.

[0006] Furthermore, the first relay is connected in parallel with the first sound and light display alarm.

[0007] Furthermore, the second comparator is connected in parallel with the second digital display.

[0008] Furthermore, the second relay is connected in parallel with the second sound and light display alarm.

[0009] Furthermore, the first signal converter, the second signal converter, the first signal amplifier, the second signal amplifier, the first comparator, the second comparator, the first relay, and the second relay are installed in the electrical control box in the cage.

[0010] Furthermore, the first digital display, the first alarm, the second digital display, and the second alarm are installed in or near the driver's console.

[0011] Compared with the prior art, the beneficial effect of the separate control load limiting device for people and goods of the construction elevator of the present invention is: by setting the separate control load limiting device for people and goods, after the operating personnel enter the construction elevator, if there is an overload, an alarm will be sounded and the construction elevator cannot operate, thereby improving the safety of the use of the construction elevator and greatly reducing the safety management risk of the construction elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the structural block diagram of the separate control and load limiting device for construction hoists.

[0013] Figure 2 This is a schematic diagram of the installation position of the separate control and load limiting device for people and goods on a construction hoist. DETAILED DESCRIPTION

[0014] See also Figure 1 to Figure 2 A construction elevator passenger and cargo separate control load limiting device comprises a weight sensor 1, a double control switch 2 electrically connected to the weight sensor 1, a cargo load limiting device 3 electrically connected to the double control switch 2, and a passenger load limiting device 4.

[0015] The load limiting device 3 includes a first signal converter 31 electrically connected to the double-control switch 2, a first signal amplifier 32 electrically connected to the first signal converter 31, a first comparator 33 and a first digital display 34 electrically connected to the first signal amplifier 32, a first relay 35 electrically connected to the first digital display 34, and a first sound and light display alarm 36.

[0016] The first comparator 33 is connected in parallel with the first digital display 34 , and the first relay 35 is connected in parallel with the first sound and light display alarm 36 .

[0017] The passenger load limiting device 4 includes a second signal converter 41 electrically connected to the double-control switch 2, a second signal amplifier 42 electrically connected to the second signal converter 41, a second comparator 43 electrically connected to the second signal amplifier 42 and a second digital display 44, a second relay 45 electrically connected to the second digital display 44 and a second sound and light display alarm 46.

[0018] The second comparator 43 is connected in parallel with the second digital display 44 , and the second relay 45 is connected in parallel with the second sound and light display alarm 46 .

[0019] The weight sensor 1 is installed in the pin shaft 7 connecting the transmission system 6 and the cage 7, the first signal converter, the second signal converter, the first signal amplifier, the second signal amplifier, the first comparator, the second comparator, the first relay, and the second relay are installed in the electrical control box (not shown) in the cage 7, and the first digital display, the first alarm, the second digital display, and the second alarm are installed in the driver's console 8 or near it.

[0020] The load limit device 3 is set to 2000kg, and the load limit device 4 is set to 720kg or less. In the case of loading, the double control switch is electrically connected to the load limit device, and in the case of loading, the double control switch is electrically connected to the load limit device.

[0021] The working principle of the present invention is as follows: when loading, the weight sensor transmits the weight data to the first signal converter, the first signal converter converts the weight data into an electrical signal proportional to it, transmits the electrical signal to the first signal amplifier, the first signal amplifier amplifies the electrical signal, the amplified electrical signal is converted into a digital quantity in one way, the weight value is displayed by the first digital display, and the other way is sent to the first comparator for comparison with the preset reference signal, the reference signal of the comparator is set to 2000kg as the pre-alarm value, when the actual weight hoisted by the construction hoist is greater than the pre-alarm value, the first comparator outputs a high potential, and drives the first sound and light display alarm to send a sound and light signal to remind the driver that the construction hoist is close to full load. At the same time, the output high potential drives the first relay to operate, and a contact of the first relay is connected in series in the control circuit of the lifting machinery. When the relay is energized, the power supply of the lifting mechanism is cut off, and the motor stops the lifting operation, which serves the purpose of protection. When carrying people, the weight sensor transmits the weight data to the second signal converter, which converts the weight data into an electrical signal proportional to it, and transmits the electrical signal to the second signal amplifier, which amplifies the electrical signal. The amplified electrical signal is converted into a digital quantity on one path, and the weight value is displayed by the second digital display. The other path is sent to the first comparator for comparison with the preset reference signal. The reference signal of the comparator sets 720kg as the pre-alarm value. When the actual weight hoisted by the construction elevator is greater than the pre-alarm value, the second comparator outputs a high potential and drives the second sound and light display alarm to send a sound and light signal to remind the driver that the construction elevator is close to full load. At the same time, the high potential output drives the second relay to operate. One contact of the second relay is connected in series in the control circuit of the lifting machinery. When the relay is energized, the power supply of the lifting mechanism is cut off, and the motor stops the lifting operation, which serves the purpose of protection.

[0022] The present invention provides a load limiting device for separate control of people and goods, so that after an operator enters the construction elevator, if there is overload, an alarm will be issued and the construction elevator cannot be operated, thereby improving the safety of the construction elevator and greatly reducing the safety management risk of the construction elevator.

[0023] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A construction hoist with separate control and load limiting device for people and goods, characterized by: It includes a weight sensor, a double-control switch electrically connected to the weight sensor, a load limit device for objects and a load limit device for people electrically connected to the double-control switch; the load limit device for objects includes a first signal converter electrically connected to the double-control switch, a first signal amplifier electrically connected to the first signal converter, a first comparator and a first digital display electrically connected to the first signal amplifier, a first relay electrically connected to the first comparator, and a first sound and light display alarm; the load limit device for people includes a second signal converter electrically connected to the double-control switch, a second signal amplifier electrically connected to the second signal converter, a second comparator and a second digital display electrically connected to the second signal amplifier, a second relay electrically connected to the second comparator, and a second sound and light display alarm; the first comparator is connected in parallel with the first digital display; the first relay is connected in parallel with the first sound and light display alarm; the second comparator is connected in parallel with the second digital display; the second relay is connected in parallel with the second sound and light display alarm.

2. The construction hoist passenger and cargo separate control load limiting device according to claim 1 is characterized by: The first signal converter, the second signal converter, the first signal amplifier, the second signal amplifier, the first comparator, the second comparator, the first relay and the second relay are installed in an electrical control box in the cage.

3. The construction hoist passenger and cargo separate control load limiting device according to claim 1 is characterized by: The first digital display, the first alarm, the second digital display, and the second alarm are installed in or near the driver's operating console.

Images