An inspection device capable of detecting personnel falling into the pit

Abstract

The present invention belongs to the technical field of elevator equipment, and particularly relates to an inspection device capable of detecting personnel falling into the pit, including an elevator shaft. The lower end of the elevator shaft is provided with a bottom floor of the well. A cleaning mechanism is arranged inside the elevator shaft. A plurality of installation grooves are formed in the upper surface of the bottom floor of the well. Microwave radars and infrared sensors staggered from the microwave radars are installed on the lower walls of the installation grooves respectively. Transparent glasses are inserted at the openings of the installation grooves. The upper surfaces of the transparent glasses are cleaned by the cleaning mechanism. The cleaning mechanism includes a cleaning brush horizontally arranged inside the elevator shaft. Electric sliding rails are horizontally installed on both sides of the elevator shaft. The upper surfaces of the two electric sliding rails are respectively connected to both ends of the cleaning brush. Foam boards are embedded and installed on the lower surfaces of the two sliders. The present invention can combine the judgments of two types of sensors to accurately judge that the fallen object is a person, and is not restricted by conditions such as the dimness of the shaft at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator equipment, and particularly relates to an inspection device capable of detecting a person falling into the pit. Background Art

[0002] With the advancement of the urbanization process, the number of high-rise buildings in China has been increasing year by year, and the use of elevators has become more and more popular. However, elevator accidents occur frequently every year. Adding a protection device in the elevator shaft is an effective means to reduce the casualty rate of elevator accidents. The existing elevator car measures the speed in real time through sensors. When a stall occurs, an airbag is inflated to protect the elevator car emergently.

[0003] After patent retrieval, a Chinese invention patent with the publication number of CN219238925U, an elevator anti-falling device, includes an anti-falling speed reducer, a sensor, an anti-falling clamping member, the side wall of the elevator shaft, the elevator car, the anti-falling speed reducer and the anti-falling clamping member. It can lock the anti-falling clamping member when the sensor detects that the running speed of the elevator car exceeds a preset value, realize the braking of the elevator car, avoid the falling of the elevator car, reduce the personal injury and equipment damage caused by the falling of the elevator car, and has high running reliability, greatly avoiding the occurrence of small accidents and reducing the damage caused by large accidents.

[0004] When the above patent detects an elevator accident, it detects the running speed of the elevator car through a sensor to timely discover the stall situation. However, when a person falls into the elevator shaft and makes a free fall motion, there is no stall signal, and it is very difficult for the sensor to detect the situation of the person falling. For this reason, we propose an inspection device capable of detecting a person falling into the pit. Summary of the Invention

[0005] The purpose of the present invention is to provide an inspection device capable of detecting a person falling into the pit, which can use the combination of two types of sensors to judge, so as to accurately judge that the falling object is a person, and is not restricted by conditions such as the dimness of the shaft.

[0006] The technical solution adopted by the present invention is specifically as follows:

[0007] An inspection device capable of detecting a person falling into a pit comprises an elevator shaft, wherein a pit floor is installed at the lower end of the elevator shaft, a cleaning mechanism is arranged inside the elevator shaft, a plurality of installation grooves are provided on the upper surface of the pit floor, microwave radars and infrared sensors staggered with the microwave radars are installed on the lower walls of the installation grooves, transparent glass is inserted at the openings of the installation grooves, the upper surface of the transparent glass is cleaned by the cleaning mechanism, and the two types of sensors are combined to accurately determine that the person who has fallen is a person, and the transparent glass can block the dust flying in the elevator shaft and will not hinder the detection, and has the characteristics of high precision and good reliability, and is not restricted by conditions such as the dimness of the shaft, and then the pit bottom protection measures are promptly started to reduce the occurrence of people falling into the pit at the bottom of the elevator shaft.

[0008] The cleaning mechanism includes a cleaning brush horizontally arranged inside the elevator shaft. Electric slide rails are horizontally installed on both sides of the elevator shaft. The upper surfaces of the two electric slide rails are respectively connected to the two ends of the cleaning brush. The two electric slide rails can be started to intermittently drive the bristles of the cleaning brush to reciprocate along the upper surface of the floor at the bottom of the shaft to sweep away dust attached to the transparent glass and keep the detection line of sight clear.

[0009] Ash storage troughs are provided on both sides of the well bottom floor, and the two ash storage troughs are parallel to the cleaning brushes. The two ash storage troughs are used to receive the dust swept down by the cleaning brushes for easy collection.

[0010] Slide blocks are slidably installed on the upper surfaces of the two electric slide rails, holes are opened on the sides of the two slide blocks that are close to each other, and the holes are respectively connected to the two ends of the cleaning brush, and foam plates are embedded and installed on the lower surfaces of the two slide blocks. The two ends of the cleaning brush are respectively supported by the two slide blocks. Once a falling object (personnel or other objects) hits the cleaning brush, the cleaning brush is driven to tear the two foam plates downward, so that the cleaning brush 7 is separated from the two electric slide rails and the slide blocks, and the two electric slide rails will not be excessively squeezed.

[0011] A plurality of drainage pipes are also installed through the upper surface of the well bottom floor. There is a distance between the drainage pipes and the installation grooves. On rainy days, water is prone to accumulate in the elevator well. The drainage pipes can be connected to the drainage pipeline to drain water and prevent the accumulated water from soaking the microwave radar and infrared sensor.

[0012] The outer side of the transparent glass is bonded with a waterproof rubber ring in an annular structure, which can close the gap between the outer side of the transparent glass and the edge of the corresponding installation groove, thereby improving the sealing performance of the microwave radar and the infrared sensor during installation.

[0013] The technical effects achieved by the present invention are:

[0014] An inspection device capable of detecting personnel falling into the bottom pit of the present invention, when working, the microwave radar in the installation groove on the bottom floor of the well detects whether it is an elevator car, a counterweight or other falling objects running in the elevator shaft. At the same time, the infrared sensor can judge whether the falling object is a tool or a living thing. The detection device combines the two types of sensors to judge, so as to accurately judge that the falling object is a person. Moreover, the transparent glass can block the dust flying in the elevator shaft and does not hinder the detection. It has the characteristics of high precision and good reliability. At the same time, it is not restricted by conditions such as the dimness of the shaft, and then promptly activates the bottom pit protection measures to reduce the occurrence of personnel falling into the elevator bottom pit.

[0015] An inspection device capable of detecting personnel falling into the bottom pit of the present invention can start two electric sliding rails to intermittently drive the bristles of the cleaning brush to reciprocate horizontally along the upper surface of the bottom floor of the well, sweeping off the dust adhering to the transparent glass and keeping the detection line of sight clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an embodiment of the front view of the present invention;

[0017] Figure 2 is an embodiment of the cross-section of the present invention;

[0018] Figure 3 is the Figure 2 enlarged embodiment at A in the present invention;

[0019] Figure 4 is the Figure 2 enlarged embodiment at B in the present invention.

[0020] In the drawings, the list of components represented by each reference numeral is as follows:

[0021] 1, elevator shaft; 2, bottom floor of the well; 3, installation groove; 4, microwave radar; 5, infrared sensor; 6, transparent glass; 7, cleaning brush; 8, electric sliding rail; 9, ash storage tank; 10, slider; 11, foam board; 12, drain pipe; 13, waterproof rubber ring. DETAILED DESCRIPTION OF THE INVENTION

[0022] In order to make the purpose and advantages of the present invention more clear, the present invention will be specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the specific protection scope claimed by the present invention.

[0023] Such as Figures 1-4As shown, an inspection device capable of detecting a person falling into a pit comprises an elevator shaft 1, a shaft bottom floor 2 is installed at the lower end of the elevator shaft 1, the outer side of the shaft bottom floor 2 is integrally connected to the lower end of the elevator shaft 1, a cleaning mechanism is arranged inside the elevator shaft 1, a plurality of mounting grooves 3 are arranged on the upper surface of the shaft bottom floor 2, a microwave radar 4 and an infrared sensor 5 staggered with the microwave radar 4 are installed on the lower wall of the mounting groove 3, the microwave radar 4 adopts the TTCsensor24G millimeter wave radar, the infrared sensor 5 adopts the ranging sensor of model LTF12UC2LDQP, and the sensing distance is 20m, the microwave radar 4 integrates speed, acceleration and displacement detection sensors, the lower end of the infrared sensor 5 and the lower end of the microwave radar 4 are fixedly connected to the lower wall of the corresponding mounting groove 3 by screws, the opening of the mounting groove 3 is inserted with a transparent glass 6, the upper surface of the transparent glass 6 is cleaned by the cleaning mechanism, first The elevator car is installed inside the elevator shaft 1. When working, the microwave radar 4 in the installation groove 3 of the bottom floor 2 of the shaft detects whether the moving object running in the elevator shaft 1 (the moving object close to the pit) is the elevator car, counterweight or other sunken objects. The speed, acceleration and displacement of the elevator car and counterweight in normal operation have certain rules, and the built-in algorithm can be used for the detection device to judge. At the same time, the infrared sensor 5 can judge whether the fallen object is a tool (such as a wrench dropped by a maintenance worker) or a living thing (a person), so as to accurately judge that the person who fell is a person, and the transparent glass 6 can block the dust flying in the elevator shaft 1 and will not hinder the detection. The detection device uses two types of sensors to combine and judge, so as to accurately judge whether the falling object is a person, and has the characteristics of high precision and good reliability. At the same time, it is not restricted by conditions such as dim shaft, and then the pit bottom protection measures are activated in time to reduce the occurrence of people falling into the pit of the elevator shaft 1.

[0024] like Figure 2 and Figure 4 As shown, the cleaning mechanism includes a cleaning brush 7 horizontally arranged inside the elevator shaft 1, and electric slide rails 8 are horizontally installed on both sides of the elevator shaft 1. The lower surfaces of the two electric slide rails 8 are respectively embedded and installed on both sides of the elevator shaft 1, and the upper surfaces of the two electric slide rails 8 are respectively connected to the two ends of the cleaning brush 7. The two electric slide rails 8 can be started once every hour to intermittently drive the bristles of the cleaning brush 7 to reciprocate along the upper surface of the shaft bottom floor 2 to sweep off the dust attached to the transparent glass 6 and keep the detection line of sight clear.

[0025] like Figure 1 and Figure 2 As shown, ash storage troughs 9 are provided on both sides of the well bottom floor 2, and the two ash storage troughs 9 are parallel to the cleaning brush 7. The two ash storage troughs 9 receive the dust swept by the cleaning brush 7 for easy collection.

[0026] like Figure 2 and Figure 4As shown in the figure, slider 10 is also slidably installed on the upper surface of each of the two electric slide rails 8. The lower surfaces of the two sliders 10 are respectively slidably connected to the upper surfaces of the two electric slide rails 8. Openings are made on the sides of the two sliders 10 close to each other, and the two ends of the cleaning brush 7 are respectively sleeved in the openings. Foam boards 11 are embedded in the lower surfaces of the two sliders 10. The two ends of the cleaning brush 7 are respectively supported by the two sliders 10. Once a falling object (person or other object) hits the cleaning brush 7, it drives the cleaning brush 7 to tear the two foam boards 11 downward, so that the cleaning brush 7 is separated from the two electric slide rails 8 and the sliders 10, and the two electric slide rails 8 will not be overly squeezed.

[0027] As Figure 1 and Figure 2 shown in the figure, a plurality of drain pipes 12 are also installed through the upper surface of the bottom well floor 2. The lower ends of the drain pipes 12 all penetrate downward through the upper surface of the bottom well floor 2. There is a gap between the drain pipes 12 and the installation groove 3. On rainy days, the elevator shaft 1 is prone to water accumulation. The drain pipes 12 can be connected to the drainage pipeline for drainage to prevent the microwave radar 4 and the infrared sensor 5 from being soaked by the accumulated water.

[0028] As Figure 1 and Figure 3 shown in the figure, a waterproof rubber ring 13 in a ring structure is bonded to the outside of the transparent glass 6. The inner sides of the waterproof rubber rings 13 are bonded to the outside of the corresponding transparent glass 6, which can seal the gap between the outside of the transparent glass 6 and the edge of the corresponding installation groove 3, and improve the sealing performance when the microwave radar 4 and the infrared sensor 5 are installed.

[0029] The working principle of the present invention is as follows: During operation, the microwave radar 4 in the installation groove 3 of the bottom well floor 2 detects whether it is an elevator car, a counterweight or other falling objects running in the elevator shaft 1, and an internal algorithm can be used to judge the detection device. At the same time, the infrared sensor 5 can judge whether the falling object is a tool or a living thing, so as to accurately judge that the falling object is a person. And the transparent glass 6 can block the dust flying in the elevator shaft 1 and will not hinder the detection. The detection device combines two types of sensors for judgment, so as to accurately judge whether the falling object is a person, without being restricted by conditions such as the darkness of the shaft, and then timely activate the pit bottom protection measures to reduce the occurrence of the situation where people fall into the bottom pit of the elevator shaft 1.

[0030] At the same time, the two electric slide rails 8 can be started to intermittently drive the bristles of the cleaning brush 7 to reciprocate horizontally along the upper surface of the bottom well floor 2 once an hour to sweep off the dust adhering to the transparent glass 6 and keep the detection line of sight clear.

[0031] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention are implemented according to the conventional means in the art without special instructions and limitations.

Claims

1. An inspection device capable of detecting a person falling into the pit, comprising an elevator shaft (1), characterized in that: The lower end of the elevator shaft (1) is provided with a bottom floor (2). A cleaning mechanism is arranged inside the elevator shaft (1). A plurality of installation grooves (3) are formed in the upper surface of the bottom floor (2). Microwave radars (4) and infrared sensors (5) staggered from the microwave radars (4) are installed on the lower walls of the installation grooves (3). Transparent glasses (6) are inserted at the openings of the installation grooves (3). The upper surfaces of the transparent glasses (6) are cleaned by the cleaning mechanism; The cleaning mechanism includes a cleaning brush (7) horizontally arranged inside the elevator shaft (1). Electric sliding rails (8) are horizontally installed on both sides of the elevator shaft (1). The upper surfaces of the two electric sliding rails (8) are respectively connected to both ends of the cleaning brush (7); Ash storage grooves (9) are formed on both sides of the bottom floor (2). The two ash storage grooves (9) are both parallel to the cleaning brush (7); Sliders (10) are also slidably installed on the upper surfaces of the two electric sliding rails (8). Openings are formed on the sides of the two sliders (10) close to each other, and the openings are respectively sleeved on both ends of the cleaning brush (7). Foam boards (11) are embedded in the lower surfaces of the two sliders (10).

2. The inspection device capable of detecting a person falling into the pit according to claim 1, characterized in that: A plurality of drain pipes (12) are also installed through the upper surface of the bottom floor (2). A spacing is left between the drain pipes (12) and the installation grooves (3).

3. The inspection device capable of detecting a person falling into the pit according to claim 1, characterized in that: Ring-shaped waterproof rubber gaskets (13) are adhesively bonded to the outsides of the transparent glasses (6).

Images