阅读说明：本技术 一种施工升降机光控检测人数机电连锁安全限制系统 (Light-operated chain safety restriction system of number of people that detects of construction elevator electromechanical ) 是由 汪成东 赵靠生 张思睿 柳辉 吕立峰 刘欣 王鹏 钟方方 于东东 柴长水 黄婧 于 2019-08-23 设计创作，主要内容包括：本发明属于施工升降机技术领域,具体涉及一种施工升降机光控检测人数机电连锁安全限制系统,包括安装在电梯轿厢一侧的候梯侧两路光触发器以及安装在电梯轿厢另一侧的安全通道侧两路光触发器,所述候梯侧两路光触发器和安全通道侧两路光触发器中两路所述的光控触发器之间的间距小于行人的厚度,以使行人进入电梯轿厢或走出电梯轿厢过程中,依次触发两路光控触发器；通过轿厢内外两路光触发器的设计,检测进出轿厢的人数,判断电梯内剩余人数,并根据剩余人数判断是否报警,是否强制限制电梯启动,是否强制减员,提升建筑行业施工电梯管理水平,杜绝施工电梯人员超载运行,有效降低安全生产事故等级,遏制重特大事故的发生。(The invention belongs to the technical field of construction elevators, and particularly relates to an electromechanical interlocking safety limiting system for light-operated detection of the number of people of a construction elevator, which comprises two paths of light triggers at a waiting side and two paths of light triggers at a safety channel side, wherein the two paths of light triggers are arranged at one side of an elevator car; through the design of two inside and outside light trigger of car, detect the number of business turn over car, judge the surplus number in the elevator to judge whether report to the police according to the surplus number, whether force the restriction elevator start, whether force the personnel of subtracting, promote the construction elevator management level of building trade, stop the construction elevator personnel and overload the operation, effectively reduce the production safety accident level, restrain the emergence of serious accident.)

1. The utility model provides a light-operated chain safety restriction system of detection number electromechanical of construction elevator which characterized in that: including installing two way optical trigger of waiting the ladder side on elevator car one side and installing two way optical trigger in the escape way side of elevator car opposite side, wait for two way optical trigger of ladder side and two way in the two way optical trigger of escape way side interval between the light operated trigger be less than pedestrian's thickness to make the pedestrian get into elevator car or walk out elevator car in-process, trigger two way light operated trigger in proper order, install in the elevator car and be used for receiving this trigger signal and with this PLC interlocking device who calculates number in the elevator car, PLC interlocking device judges whether to send out the alarm of superintendent according to the calculated result.

2. The light-operated number-of-people detection electromechanical interlocking safety limiting system for the construction elevator as claimed in claim 1, wherein: waiting for two way optical trigger of terraced side is including installing the optical trigger of the same kind in elevator car and waiting another way optical trigger of terraced department to make the pedestrian enter into elevator car or arrive in waiting the terraced in-process from waiting the terraced department, trigger two way optical trigger in proper order.

3. The light-operated number-of-people detection electromechanical interlocking safety limiting system for the construction elevator as claimed in claim 1, wherein: two way light trigger of safety channel side is including installing the light-operated trigger of the same kind in elevator car and another light-operated trigger of safety channel side to make the pedestrian enter into elevator car or arrive the safety channel side in-process in the elevator car from the safety channel side, trigger two way light-operated triggers in proper order.

4. The light-operated number-of-people detection electromechanical interlocking safety limiting system for the construction elevator as claimed in any one of claims 1 to 3, wherein: the light-operated trigger adopts a photoelectric detection circuit to convert an optical signal when a pedestrian passes into an electric signal.

5. The light-operated number-of-people detection electromechanical interlocking safety limiting system for the construction elevator as claimed in claim 4, wherein: the photoelectric detection circuit is a Schmitt trigger consisting of two 555 timers which are symmetrical up and down and have the same circuit structure.

6. The light-operated number-of-people detection electromechanical interlocking safety limiting system for the construction elevator as claimed in claim 5, wherein: the two light-operated triggers are in signal connection with the PLC interlocking device through a judging circuit, and the judging circuit is composed of a 74LS74 double-D trigger and two NOT gates.

7. The light-operated number-of-people detection electromechanical interlocking safety limiting system for the construction elevator as claimed in claim 1, wherein: the PLC interlocking device is in signal connection with a frequency converter of an elevator driving system, and when the PLC interlocking device sends out an overtaking alarm signal, the PLC interlocking device blocks the output of the frequency converter to prohibit the construction elevator from starting and running.

8. The light-operated number-of-people detection electromechanical interlocking safety limiting system for the construction elevator as claimed in claim 1, wherein: and a number display connected with the PLC interlocking device in a signal mode is installed in the elevator car.

Technical Field

The invention belongs to the technical field of construction elevators, and particularly relates to an electromechanical interlocking safety limiting system for the number of people detected by a light control system of a construction elevator.

Background

At present, the internal construction elevator basically adopts a lifting capacity limiting device to limit overload operation, the general weight limit is 2 tons, although the national standard clearly requires that the number of the load-limiting people of the construction elevator does not exceed 9 people (8 passengers and 1 driver), the number of people of the equipment self does not have a forced limiting device, the safety consciousness of the driver is operated by depending on the self-perception of construction operators (passengers) or a human-cargo elevator, the principle of life ascending and intrinsic safety is not realized, and the number of people of the construction elevator is particularly important under the conditions that the safety consciousness of the operation workers is thin and the field control capacity is insufficient.

Disclosure of Invention

The invention provides an electromechanical interlocking safety limiting system for the number of people detected by a light control of a construction elevator, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a light-operated chain safety restriction system of detection number electromechanics of construction elevator, is including installing waiting two way optical trigger in the ladder side of elevator car one side and installing two way optical trigger in the safety channel side of elevator car opposite side, wait two way in two way optical trigger in ladder side and the two way optical trigger in the safety channel side interval between the optical trigger be less than pedestrian's thickness to make the pedestrian get into elevator car or walk out the elevator car in-process, trigger two way optical trigger in proper order, install in the elevator car and be used for receiving this trigger signal and with this PLC interlocking device who calculates number in the elevator car, PLC interlocking device judges whether to send out the alarm of excess person according to the calculated result.

Preferably, the two optical triggers on the waiting side comprise one optical trigger installed in the elevator car and the other optical trigger on the waiting place, so that pedestrians can sequentially trigger the two optical triggers in the process of entering the elevator car from the waiting place or arriving the waiting place from the elevator car.

Preferably, the two-way optical trigger at the side of the safety channel comprises one-way optical trigger installed in the elevator car and the other-way optical trigger at the side of the safety channel, so that the pedestrians sequentially trigger the two-way optical triggers when entering the elevator car from the side of the safety channel or arriving at the side of the safety channel from the elevator car.

Preferably, the light-operated trigger converts an optical signal when a pedestrian passes into an electric signal by using a photoelectric detection circuit.

Preferably, the photoelectric detection circuit is a schmitt trigger composed of two 555 timers which are symmetrical up and down and have the same circuit structure.

Preferably, the two optical control triggers are in signal connection with the PLC interlocking device through a judgment circuit, and the judgment circuit is composed of one 74LS74 dual D trigger and two not gates.

Preferably, the PLC interlocking device is in signal connection with a frequency converter of the elevator driving system, and when the PLC interlocking device sends out an overload alarm signal, the PLC interlocking device blocks the output of the frequency converter so as to forbid the construction elevator from starting operation.

Preferably, a number display connected with the PLC interlocking device through signals is installed in the elevator car.

Compared with the prior art, the invention has the beneficial effects that:

through the design of two inside and outside light trigger of car, detect the number of business turn over car, judge the remaining number in the elevator to judge whether report to the police according to the remaining number, whether force the restriction elevator start, whether force the personnel of subtracting, promote the construction elevator management level of building trade, stop the construction elevator personnel and overload the operation, effectively reduce the production safety accident level, restrain the emergence of serious accident.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a control flow chart of the present invention;

FIG. 3 is a circuit diagram of a light control detection circuit of the present invention;

FIG. 4 is a circuit diagram of the timing control circuit of the present invention.

In the figure: 11. two paths of optical triggers on the waiting side; 12. two paths of optical triggers at the side of the safety channel; 2. A PLC interlocking device; 3. a display for the number of people.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides the following technical solutions: the utility model provides a light-operated chain safety restriction system that detects number electromechanics of construction elevator, including installing two way optical trigger 11 of waiting the terraced side and installing two way optical trigger 12 of safety channel side at elevator car opposite side in elevator car one side, the interval between the light-operated trigger of two ways in waiting two way optical trigger 11 of terraced side and two way optical trigger 12 of safety channel side is less than pedestrian's thickness, so that the pedestrian gets into elevator car or walk out the elevator car in-process, trigger two way light-operated trigger in proper order, install the PLC interlocking device 2 that is used for receiving this trigger signal and with this calculation number in the elevator car, PLC interlocking device 2 judges whether to send out the warning of overtaking according to the calculated result.

In this embodiment, two paths of optical triggers 11 are simultaneously installed at the waiting construction elevator in the construction elevator car and outside (the waiting elevator on each floor needs to be provided with one path of trigger), when a person enters and exits the elevator car, the trigger is triggered, and relevant signals are input to the PLC interlocking device 2, after the PLC interlocking device 2 receives the input signals, the calculation of the number of people actually taking the construction elevator is completed through executing a written control program, when the number of people actually taking the construction elevator exceeds 9 people, the PLC control unit connected in series with the elevator control system is used for blocking the output of the frequency converter, the construction elevator is forbidden to start and operate, and the PLC outputs an acousto-optic alarm trigger signal, and triggers an acousto-optic alarm device to remind a driver of an overtaking.

Specifically, the two optical triggers 11 on the waiting side of the elevator comprise one optical trigger installed in the elevator car and the other optical trigger on the waiting place, so that pedestrians can sequentially trigger the two optical triggers when entering the elevator car from the waiting place or arriving at the waiting place from the elevator car.

Specifically, the two-way optical trigger 12 on the side of the safety channel includes one-way optical trigger installed in the elevator car and the other-way optical trigger on the side of the safety channel, so that pedestrians can sequentially trigger the two-way optical triggers when entering the elevator car from the side of the safety channel or arriving at the side of the safety channel from the elevator car.

Specifically, the light-operated trigger converts an optical signal when a pedestrian passes into an electric signal by using a photoelectric detection circuit.

Specifically, the photoelectric detection circuit is a schmitt trigger composed of two 555 timers which are symmetrical up and down and have the same circuit structure.

In the embodiment, two light control circuits are respectively arranged and designed at the positions of the construction elevator waiting for construction inside and outside the construction elevator car; one way is placed outside elevator car, and another way is placed inside elevator car, when someone passes through elevator car (no matter get into or go out elevator car), all can trigger a light-operated circuit earlier, triggers another light-operated circuit again.

The photoelectric detection circuit is a schmitt trigger composed of two 555 timers which are symmetrical up and down and have the same circuit structure, as shown in fig. 3.

The distance between the two photoelectric control circuits cannot be too far, and is at most the thickness of the human body so as to ensure the moment when the two detection light-sensitive resistors are blocked.

Principle analysis: RG is a photoresistor, when RG is irradiated by light, the resistance value of the photoresistor is reduced, the voltage of the 6 terminal is reduced, and the output port 3 outputs high level at the moment; otherwise, when RG is weak light, its resistance value is raised, and the voltage of 6 ends is raised, and output port 3 outputs low level at this time.

Specifically, the two optical control triggers are in signal connection with the PLC interlocking device 2 through a judgment circuit, and the judgment circuit is composed of a 74LS74 dual D trigger and two not gates.

In this embodiment, the elevator car entrance and exit judging circuit is composed of a 74LS74 double D trigger and two not doors, as shown in fig. 3.

The points a and b are respectively the output ends of the external and internal light control circuits of the elevator car, namely the output end 3 pins of the 555 timer, the points a and b are respectively connected with CP clock pulses of the two D triggers and then are respectively connected with the R reset end of the other D trigger through a NOT gate, and the input ends D and the setting end S of the two D triggers are both connected with a high level 1. When a person comes in, the point A in the circuit outputs a high-level pulse 1; when a person goes out, the point B in the circuit outputs a high-level pulse 1; when no one is present, the outputs of the points A and B in the circuit are both low level 0.

Specifically, PLC interlock 2 and elevator actuating system's converter signal connection, when PLC interlock 2 sent the alarm signal of overtaking, PLC interlock 2 blockaded the output of converter to forbid construction elevator start-up operation.

Specifically, a number display 3 in signal connection with the PLC interlocking device 2 is installed in the elevator car.

In this embodiment, the above determination is implemented by PLC programming, outputs a and B in fig. 4 are input to the PLC, and the PLC detects the number of actual passengers in the construction elevator car based on the number of high and low levels of a and B.

PLC takes the elevator number and sets for taking the elevator number through the contrast in fact, carries out corresponding control according to the comparison result, if the actual number of taking that PLC detected is greater than the 9 people of settlement number, PLC output blockades signal to the converter, blockades the output of converter, forbids construction elevator start-up operation to PLC output audible-visual alarm trigger signal triggers acousto-optic alarm equipment and reminds the driver to surpass the official.

The blocking signal and the acousto-optic alarm triggering signal cannot be manually removed by a driver, the number of people in the construction elevator car is forcibly reduced, until the PLC detects that the number of people in the construction elevator car is less than or equal to 9 people, the blocking signal and the acousto-optic alarm triggering signal are removed, and the construction elevator can be started and normally operates.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.