Rail shielding door pressure sensing emergency device

Abstract

The utility model provides a rail shielding door pressure sensing emergency device, a spring compression contact is installed on a reset spring, the spring compression contact is connected with a pressure sensor so as to detect pressure generated by a person or object clamping event, the pressure sensor is electrically connected with an electric signal conversion system, and the electric signal conversion system is connected with the reset spring. A physical pressure signal of the pressure sensor is converted into an electric signal, the buzzer gives an alarm to receive the electric signal and gives a sound alarm when abnormal pressure is detected, and meanwhile the door control unit DCU receives the electric signal and controls opening and closing of the shielding door according to the signal. The rail shielding door pressure sensing emergency device provides a scheme which is reliable, timely in feedback and rapid in emergency response.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of traffic transportation, and particularly relates to a rail shield door pressure sensing emergency device. BACKGROUND

[0002] The subway shield door pressure sensing monitoring device is a safety device for monitoring the pressure condition of the shield door on the subway platform. When a passenger or an article is clamped in the shield door, the device can sense abnormal pressure and immediately take emergency measures, such as automatically reopening the shield door, to prevent injury or damage.

[0003] The existing subway shield door safety monitoring technology mainly uses infrared light curtain detectors. The infrared detectors are usually installed on both sides of the subway shield door and detect whether there is an obstacle between the door and the platform by emitting and receiving infrared rays. After the train door and the platform shield door are completely closed, the infrared light curtain detectors arranged on both sides automatically emit infrared rays to form a light curtain barrier. If an obstacle such as a passenger or an article blocks the light curtain between the two doors, the detector will detect it at the first time and send an alarm signal, thereby triggering the safety mechanism to terminate the departure signal and prevent the shield door from closing the train to start and cause injury accidents.

[0004] Although the use of infrared detectors in subway shield door safety monitoring improves safety, it also has some disadvantages:

[0005] ① The detector of the infrared detector is generally about 1 meter high, which means that if a passenger's bag or other articles are clamped at a height higher than the infrared detector, the detector may not be able to detect it, resulting in the possibility of clamping the articles when the door is closed, and the safety of the articles is at risk;

[0006] ② Since there are blind spots in infrared detection, station attendants and drivers need to manually confirm safety at the rear and front of the train. This increases the complexity of manual operation and increases the possibility of errors;

[0007] ③ The material of some objects may affect the reflection and reception of infrared rays, causing the detector to fail to accurately detect. In addition, environmental factors such as temperature and humidity may also have some impact on infrared sensing;

[0008] Therefore, how to solve the problems in subway shield door pressure sensing monitoring and provide a reliable, timely feedback and fast emergency response is a technical problem that needs to be solved by those skilled in the art. INVENTION CONTENTS

[0009] The utility model aims at the problems in the prior art and provides a rail shield door pressure sensing emergency device.

[0010] To this end, the above-mentioned purposes of the utility model are realized by the following technical solutions:

[0011] A rail shield door pressure sensor emergency device is characterized by:

[0012] The application is applied to a rail transit shield door, the rail transit shield door comprises a fixed door and a sliding door, the fixed door is arranged on both sides of the sliding door, the sliding door comprises a left sliding door body and a right sliding door body, the adjacent parts of the two door bodies are symmetrically provided with a trouble-escaping anti-pinch structure, the trouble-escaping anti-pinch structure comprises an anti-pinch elastic assembly, the anti-pinch elastic assembly has a height direction and is provided with a pair of anti-pinch elastic assemblies, the anti-pinch elastic assembly is provided with N telescopic sleeves and a reset spring in the horizontal direction, each telescopic sleeve is nested, the reset spring is fixed to the bottom surface of the outermost telescopic sleeve, and the reset spring pushes open the Nth telescopic sleeve when resetting, and the Nth telescopic sleeves of the anti-pinch elastic assemblies arranged oppositely are overlapped side by side and then respectively inserted into the inner cavities of the N-1th telescopic sleeves on the opposite sides, and the N-1th telescopic sleeves are relatively matched to form closed telescopic sleeves on both sides.

[0013] The reset spring and the telescopic sleeve on the outermost side are connected with a pressure sensor, the pressure sensor detects the pressure generated by a person or object pinching event and converts the physical pressure signal into an electrical signal, the pressure sensor is electrically connected with a DCU door control unit, the opening and closing of the shield door are controlled according to the electrical signal, the DCU door control unit is electrically connected with a buzzer, and the buzzer gives an audible alarm when detecting abnormal pressure according to the electrical signal.

[0014] While the above technical solutions are adopted, the utility model can also adopt or combine the following technical solutions:

[0015] As a preferred technical solution of the utility model, the pressure threshold value in the DCU door control unit is set to 10 kg, and the DCU will give an alarm signal when the pressure detected by the pressure sensor exceeds this value.

[0016] As a preferred technical solution of the utility model, the pressure threshold value in the DCU door control unit is set to 15 kg, and the DCU door control unit drives the sliding door to open when the pressure detected by the pressure sensor exceeds this value.

[0017] As a preferred technical solution of the utility model, the material of the pressure sensor is piezoelectric material, including piezoelectric single crystal, piezoelectric ceramic or piezoelectric film.

[0018] As a preferred technical solution of the utility model, a plurality of anti-pinch elastic assemblies are arranged on the sliding door in different height directions, each reset spring is respectively provided with a pressure sensor, and each pressure sensor is electrically connected with the DCU door control unit.

[0019] Compared with the prior art, the utility model have following beneficial effect: with the pressure sensor of reset spring and the most outside telescopic sleeve pipe junction effective monitoring subway shield door's operating condition, when the shield door meets the obstacle in the closing process, the reset spring compression force produces the deformation, through the pressure sensor converts into the electric signal, can detect the obstacle fast, and immediately trigger the alarm and the door opening mechanism, through the transmission mode of pressure conversion electric signal improves the stability of information transmission, ensures the reliability of system, through the timely feedback and the quick emergency response, effectively reduces the accident rate caused by the shield door clamping people or clamping things, when the people or thing clamping event occurs, through the escape prevention clamping structure allows the passenger to escape by oneself, reduces the dependence on the station staff, promotes the overall safety of subway system, in the rail transit operation system has the application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a pressure sensing emergency device structure diagram for rail shield door;

[0021] Figure 2 It is a telescopic sleeve internal structure diagram in the utility model;

[0022] Figure 3 It is a one side escape prevention clamping structure internal structure diagram in the utility model;

[0023] Figure 4 It is a passenger self-help state diagram of the invention two side escape prevention clamping structure in the utility model;

[0024] Figure 5 It is a rail transit shield door clamping thing state diagram in the utility model.

[0025] In the drawings, escape prevention clamping structure 1;Anti-pinch elastic component 2;Escape roller shaft assembly 3;Telescopic sleeve 4;Telescopic sleeve 5;Limiting block 6;Through hole 7;Reset spring 9;Pivot 10;Roller bearing 11;Roller 12;Fixed plate 13;Support frame 14;Solid tube 15;Pressure sensor 16;DCU door control unit 17;Buzzer 18. DETAILED DESCRIPTION

[0026] The utility model is further described in detail with reference to the drawings and specific examples.

[0027] Example 1

[0028] A kind of iron shield door pressure sensing emergency device of the utility model is suitable in the rail transit shield door disclosed in Chinese utility model patent CN115467616A.

[0029] As Figures 1-5As shown, the emergency device for pressure sensing of the iron shielding door is applied to a rail transit shielding door, and comprises a fixed door and a sliding door, the fixed door is arranged on both sides of the sliding door, the sliding door comprises a left sliding door body and a right sliding door body, and the two side door bodies are symmetrically provided with a trouble-escaping anti-pinch structure 1. Figures 4-5 As shown, the trouble-escaping anti-pinch structure 1 comprises an anti-pinch elastic assembly 2 and a trouble-escaping roller shaft assembly 3, the anti-pinch elastic assembly 2 has a height direction and is provided with a pair of anti-pinch elastic assemblies 2, N telescopic sleeves 4 and a reset spring 9 are arranged on the anti-pinch elastic assembly 2 in the horizontal direction, each telescopic sleeve 4 is nested step by step, the reset spring 9 is fixed to the bottom surface of the outermost telescopic sleeve 4, when the reset spring 9 is compressed, each telescopic sleeve 4 is retracted into the outer sleeve, when the reset spring 9 is reset, the Nth telescopic sleeve 4 is pushed open, the telescopic sleeve 4 is in a ladder shape or a wedge shape, so that the telescopic range of the anti-pinch elastic assembly 2 can be extended and reinforced, therefore, the trouble-escaping anti-pinch structure 1 is not limited to the outer packaging of the subway shielding door, and is also compatible with the outer packaging of elevator doors and other similar sliding doors or sliding doors.

[0030] The anti-pinch elastic assembly 2 is preferably composed of three telescopic sleeves 4, the innermost telescopic sleeve of the anti-pinch elastic assembly 2 is the third telescopic sleeve, the outer side of the third telescopic sleeve is sequentially provided with the second telescopic sleeve and the first telescopic sleeve, when the reset spring 9 is reset, the trouble-escaping roller shaft assembly 3 and the third telescopic sleeve are inserted into the inner cavity of the second telescopic sleeve, and the second telescopic sleeve is relatively matched to form the closure of the two telescopic sleeves.

[0031] The top surface of the third telescopic sleeve 4 of the anti-pinch elastic assembly 2 is provided with a fixed plate 13, the fixed plate 13 is rotationally connected with the trouble-escaping roller shaft assembly 3, the trouble-escaping roller shaft assembly 3 further comprises a support frame 14 and a roller bearing 11, the two ends of the fixed plate 13 are respectively connected with the support frames 14, the rotation shaft 10 is inserted into the inner walls of the two support frames 14, the roller bearings 11 are respectively inserted into the two ends and the middle of the rotation shaft 10, and the outer wall of the roller bearing 11 is sleeved with the cylinder 12. The support frame 14 can accurately slide along the outer wall of the cylinder 12 in the direction of the Nth telescopic sleeve 4, and no deviation occurs, the roller bearing 11 can reduce the friction coefficient in the operation process of the cylinder 12, so that the sliding of the entire trouble-escaping roller shaft assembly 3 is more convenient and smooth, and when the shielding door pinches a person or an object, the person or the object can be smoothly pulled out through the rotation of the cylinder 12.

[0032] Each telescopic sleeve 4 of the anti-pinch elastic assembly 2 is provided with a corresponding telescopic sleeve 5, each telescopic sleeve 5 is nested to form a long tube, the Nth telescopic sleeve 5 is a solid tube 15, the bottom center of the outermost telescopic sleeve 5 is fixed with one end of the return spring 9, the other end of the return spring 9 penetrates each telescopic sleeve 5 and is fixed to the bottom center of the solid tube 15, when the return spring 9 is reset, it pushes open the Nth telescopic sleeve 5 and the sleeve, and the sleeve pushes open the Nth telescopic sleeve 4 and the sleeve, the telescopic sleeve 5 can better limit the linear motion track of the return spring 9, is not easy to bend, and protects the service life of the return spring 9. The anti-pinch elastic assembly 2 is aligned from top to bottom and is provided with three long tubes, the long tube is a circular tube. The bottom end of each telescopic sleeve 5 is provided with a limiting block 6, the outer diameter of the limiting block 6 is smaller than the inner diameter of the outer telescopic sleeve 5, the limiting block 6 of the second to N-1th telescopic sleeve 5 is provided with a through hole 7 through which the return spring 9 can pass, the inner diameter of the through hole 7 is smaller than the outer diameter of the limiting block 6 of the inner telescopic sleeve 5, and the telescopic sleeve 5 can slide or be limited in the outer telescopic sleeve 5. The telescopic sleeve 5 and the telescopic sleeve 4 of the anti-pinch elastic assembly 2 are made of stainless steel or engineering plastic, and can be selected from more optimal engineering special materials, so as to improve the use strength and corrosion resistance of the escape anti-pinch structure 1 and not be easy to be damaged. The outer wall of the roller 12 is wrapped with rubber foam sponge, the rubber foam sponge has a cylindrical structure, and the rubber foam sponge can avoid injury to people or damage to objects.

[0033] The return spring 9 is connected with the outermost telescopic sleeve 5, and a pressure sensor 16 is arranged at the connection position, the pressure sensor 16 detects the pressure generated by the person or object clamping event, and converts the physical pressure signal into an electric signal, the pressure sensor 16 is electrically connected with a DCU door control unit 17, the opening and closing of the shielding door are controlled according to the electric signal, the DCU door control unit 17 is electrically connected with a buzzer 18, and the buzzer 18 gives an audible alarm when the electric signal detects an abnormal pressure.

[0034] A pressure threshold of 10 kg is set in the DCU door control unit, when the pressure detected by the pressure sensor exceeds this value, the buzzer 18 gives an alarm signal.

[0035] A pressure threshold of 15 kg is set in the DCU door control unit, when the pressure detected by the pressure sensor exceeds this value, the DCU door control unit 17 drives the sliding door to open, wherein the DCU door control unit 17 drives the sliding door to open through a sliding door screw rod motor 19.

[0036] The DCU door control unit refers to a door machine controller for controlling the opening and closing of each sliding door of a subway shielding door system. The CPU group, storage unit, interface unit and network module of the DCU are connected through a mainboard to realize accurate control of the shielding door.

[0037] The DCU door control unit is a key component in a metro screen door system, responsible for controlling and monitoring the opening and closing state of the screen door. When the pressure sensor is electrically connected to the DCU door control unit, and the DCU door control unit is further electrically connected to the buzzer, the buzzer alarm can be triggered when the pressure value is greater than 10 kg by the following steps:

[0038] The pressure sensor selected by the pressure sensor can measure at least 15 kg pressure and output a signal of 4-20mA or 0-10V.

[0039] In the utility model, the pressure sensor is provided with an output interface connected with the input interface of the DCU door control unit.

[0040] In the utility model, three sets of anti-pinch elastic components are arranged in different height directions, and each reset spring is provided with a pressure sensor. The deformation caused by physical force in different height directions transmits the pressure signal, and the obstacles are detected more accurately.

[0041] The material of the pressure sensor is piezoelectric material, including piezoelectric single crystal, piezoelectric ceramic or piezoelectric film.

[0042] In the utility model, the pressure sensor emergency device is an important component of the metro screen door and is frequently used when the screen door is in an emergency situation. When the screen door is pinched by a person or a foreign object, the sensing emergency device must be used for transmission. In each screen door emergency, the sensing emergency device transmits signals to the door control unit to trigger the emergency processing buzzer alarm of the screen door and the opening of the screen door. This process cannot have any mistakes. If the signal transmission fails, it will cause considerable personal injury to passengers, and even may endanger life; not only this, but also will cause the property loss of the metro operation enterprise and further cause social influence. Therefore, the optimization and improvement of the screen door sensing emergency device plays a crucial role in the safety of people's lives.

[0043] The utility model discloses from the angle of fault-safety design, through the research shielded door sensing emergency device's structure and the operating principle, the original infrared sensing emergency device is improved into pressure sensing emergency device. Three reset springs are installed on the shielded door anti-pinch device, three reset springs have compression contact with the pressure sensor, according to the pressure that the spring deformation variable of clamping person or thing produces is converted into electric signal, triggers the buzzer alarm and the door control unit control open door. The device adopts pressure electric signal transmission to improve the stability of information transmission, when the sudden clamping person or thing danger, can stably trigger the buzzer alarm and the door control unit control open door. The linkage with shielded door anti-pinch device realizes that the passenger is independent and saves oneself, need not wait for the station staff to arrive on the scene and help, reduces the reaction time of station staff, also avoided the station staff in the confusion and make mistakes in the rescue, effectively reduced the accident rate. Through the improvement of shielded door piezoelectric sensing emergency device, the safety of the passenger boarding subway train is ensured, and a good safety reputation of the subway is established.

[0044] When a person or an article is clamped by the shielded door, the primary spring in the shielded door emergency device is deformed under pressure, and the sleeve telescopes to extrude the primary spring on the secondary piezoelectric sensing device, so that the sensor feeds back an electric signal to make the buzzer work.

[0045] In the utility model, when the shielded door encounters an obstacle (such as a human body or an object) during the closing process, the spring compression contact is deformed under force, the deformed spring contact acts on the pressure sensor, the sensor converts the pressure into an electric signal, the electric signal is transmitted to the buzzer and the DCU door control unit, the buzzer emits an alarm sound after receiving the signal, warning the surrounding personnel and the station staff, at the same time, the DCU receives the signal immediately to control the shielded door to stop closing and reopen to release the clamped person or object. If the pressure persists, the system may continuously alarm and keep the door open until the obstacle is removed.

[0046] The utility model discloses a piezoelectric sensing emergency device, which improves the overall safety of the subway system and establishes a good safety reputation for the subway operation. The design of pressure electric signal transmission improves the stability of information transmission, ensures the reliability and efficiency of the system in emergency situations. The improved shielded door sensing emergency device significantly improves the safety and reliability of the subway shielded door by combining pressure sensor technology and an automatic control system, providing a safer and more convenient environment for passengers.

[0047] Compared with the prior art, the utility model has the following beneficial effects:

[0048] 1. Direct transmission of reliable signals through physical contact to transmit signals. Avoid misjudgment or misoperation caused by environmental interference.

[0049] 2. Indicate the opening and closing requirements of the door by pressing the contact points of the reset spring and the pressure sensor. This way can make the door movement more accurate.

[0050] 3. The three-level contact pressing in different height directions has higher stability and durability, and is not easily affected by environmental factors.

[0051] 4. The contact pressing sensing of the reset spring can adapt to various application scenarios.

[0052] The above specific embodiments are used to explain and illustrate the present application, and are only preferred embodiments of the present application, not to limit the present application. Any modification, equivalent replacement, improvement, etc. made to the present application within the spirit and protection scope of the claims of the present application, all fall within the protection scope of the present application.

Claims

1. A rail transit shield door pressure sensor emergency device, characterized in that: It is applied to a rail transit shield door, which comprises a fixed door and a sliding door, the fixed door is arranged on both sides of the sliding door, the sliding door comprises a left sliding door body and a right sliding door body, the adjacent parts of the two door bodies are symmetrically provided with a trouble-escaping anti-pinch structure, the trouble-escaping anti-pinch structure comprises an anti-pinch elastic assembly, the anti-pinch elastic assembly is provided with a pair in the same height direction, the anti-pinch elastic assembly is provided with N telescopic sleeves and a return spring in the horizontal direction, each telescopic sleeve is nested, the return spring is fixed to the bottom surface of the outermost telescopic sleeve, when the return spring is reset, the Nth telescopic sleeve is pushed open to push the sleeve to stretch out, after the sleeve stretches out, the Nth telescopic sleeve of the anti-pinch elastic assembly arranged oppositely overlaps side by side and respectively extends into the inner cavity of the N-1th telescopic sleeve on the opposite side, the N-1th telescopic sleeve is relatively matched to form the closure of the two telescopic sleeves; The connection between the return spring and the outermost telescopic sleeve is provided with a pressure sensor, the pressure sensor detects the pressure generated after a person or an object is pinched and converts the physical pressure signal into an electrical signal, the pressure sensor is electrically connected with a DCU door control unit, the opening and closing of the shield door are controlled according to the electrical signal, the DCU door control unit is electrically connected with a buzzer, and the buzzer gives an audible alarm when an abnormal pressure is detected according to the electrical signal.

2. A track screen door pressure sensing emergency device as defined in claim 1 wherein: The pressure threshold value in the DCU door control unit is set to 10 kg, when the pressure detected by the pressure sensor exceeds this value, the buzzer gives an alarm signal.

3. A track screen door pressure sensing emergency device as defined in claim 1 wherein: The pressure threshold value in the DCU door control unit is set to 15 kg, when the pressure detected by the pressure sensor exceeds this value, the DCU door control unit drives the sliding door to open.

4. A track screen door pressure sensing emergency device as defined in claim 1 wherein: The material of the pressure sensor is piezoelectric material, including piezoelectric single crystal, piezoelectric ceramic or piezoelectric film.

5. A track screen door pressure sensing emergency device as defined in claim 1 wherein: The sliding door is provided with a plurality of anti-pinch elastic assemblies in different height directions, each return spring is respectively provided with a pressure sensor, and each pressure sensor is electrically connected with the DCU door control unit.

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