A handheld device for measuring the gap between elevator doors and the strength of elevator shaft walls

Abstract

The present invention discloses a handheld device for measuring the gap between elevator doors and the strength of elevator shaft walls, which is composed of a housing, a pneumatic drive system and an electrical control system. The pneumatic drive system consists of a screw cap, a push plate, a cylinder, a micro booster air pump, pipelines, an overflow valve, etc. The electrical control system consists of a battery, a motor, an MCU chip, an AD chip, a linear displacement sensor, a pressure sensor, a solenoid valve, a circuit board, an input keyboard, a display screen, a power switch, etc. The housing is a cuboid structure with a hollow interior. This device has the advantages of small size, light weight, simple operation, high working efficiency and high measurement accuracy, and solves the disadvantages of low working efficiency, inconvenient operation and low measurement accuracy of the traditional methods for measuring the gap at the most unfavorable points of elevators and the strength of elevator shaft walls.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator detection, and particularly relates to a handheld device for measuring the gap between elevator doors and the strength of elevator hoistway walls. Background Art

[0002] According to the provisions of TSG T7001-2009 "Rules for Elevator Supervision and Periodic Inspection - Traction and Forced Drive Elevators", when the elevator door is closed, the gap between the elevator doors shall meet the following requirements: in the opening direction of the horizontal sliding door and the active leaf of the folding door, a force of 150 N is applied manually at the most unfavorable point, and the gap described in the previous article is allowed to increase, but for side-opening doors, it shall not be greater than 30 mm, and for center-opening doors, the sum shall not be greater than 45 mm;

[0003] The traditional method for measuring the gap between elevator doors is as follows: generally, the door leaf is pulled open at the bottom of the door leaf with a force of about 150 N by hand, and a straight ruler or a tape measure is used to measure the corresponding gap. It is also possible to use a dynamometer (such as a spring scale with readings) for measurement, but in actual operation, it is not easy to install the dynamometer on the elevator door, and at least two persons are required to operate together, resulting in low work efficiency, inconvenient operation, and low measurement accuracy.

[0004] Currently, there are some specially developed dedicated devices for measuring the gap at the most unfavorable point of elevator doors. Although they have the advantages of advanced technology and high automation, they also have the disadvantages of complex equipment, large volume, heavy weight, and poor reliability.

[0005] According to the provisions of GB7588-2003 "Safety Code for the Construction and Installation of Elevators", the elevator hoistway wall should have a certain mechanical strength, that is, a force of 300 N is evenly distributed over a circular or square area of 5 cm 2 and vertically applied to any point on the hoistway wall, and the elastic deformation should not be greater than 15 mm; for the hoistway wall under the landing sill of the landing door, the elastic deformation should not be greater than 10 mm.

[0006] When measuring the strength of the elevator hoistway wall, there is currently a lack of a dedicated measuring tool that can be conveniently used at the elevator use site and is specifically used for measuring the strength of the hoistway wall. Summary of the Invention

[0007] The purpose of the present invention is to overcome the above-mentioned disadvantages of the background art and provide a handheld device for measuring the gap between elevator doors and the strength of elevator hoistway walls.

[0008] The technical solution of the present invention is: a handheld device for measuring the gap between elevator doors and the strength of the elevator shaft wall, which consists of a housing, a pneumatic drive system and an electrical control system. The pneumatic drive system consists of a screw cap, a push plate, a cylinder, a micro booster air pump, a pipeline, a relief valve, etc. The electrical control system consists of a battery, a motor of the micro booster air pump, an MCU chip, an AD chip, a linear displacement sensor, a pressure sensor, a solenoid valve, a circuit board, an input keyboard, a display screen, a power switch, etc.; the housing is a cuboid structure with a hollow interior. The front of the housing is provided with a display screen, a power switch and an input keyboard. The side of the housing is provided with a rectangular hole, and a fixed insertion plate for easily inserting into the elevator door gap is provided below the rectangular hole. The cylinder is fixed inside the housing, and the plunger of the cylinder extends out of the housing through the rectangular hole and is fixedly connected to the push plate by a screw cap with an outer end face area of 5 cm 2 (ignoring the influence of the holes and depressions on the outer end face of the screw cap on the outer end face area). A linear displacement sensor is provided inside the housing. The measuring rod of the linear displacement sensor extends out of the housing through the rectangular hole and is fixedly connected to the push plate by a screw. The measuring rod of the linear displacement sensor follows the telescopic movement of the cylinder plunger; a battery, a micro booster air pump, a pipeline, a relief valve, a circuit board, an MCU chip, an AD chip, a pressure sensor, a solenoid valve, a circuit board, etc. are also provided inside the housing.

[0009] The electrical control system consists of a battery, a motor of the micro booster air pump, an MCU chip, an AD chip, a linear displacement sensor, a pressure sensor, a solenoid valve, a circuit board, an input keyboard, a display screen, a power switch, etc. The battery is respectively connected to the motor of the micro booster air pump, the pressure sensor, the linear displacement sensor, the AD chip and the MCU chip through circuits to provide power. Among them, the AD chip is connected to the pressure sensor, the linear displacement sensor and the MCU chip through circuits, and the MCU chip is connected to the micro booster air pump, the solenoid valve, the input keyboard and the display screen through circuits.

[0010] The AD chip can adopt a single two-channel AD chip or two single-channel AD chips to convert the analog signals output by the linear displacement sensor and the pressure sensor into digital signals respectively and provide them to the MCU chip for further processing; the input keyboard is used to set the thrust of the cylinder, and the pressure sensor is used to monitor the gas pressure in the cylinder; the "start test" button is located in the middle of the input keyboard and is used to start the test function; the solenoid valve is controlled by the MCU chip to release the gas in the cylinder; the display screen is used to display the cylinder thrust value, the gas pressure value in the cylinder, the displacement value of the push plate, and prompt information; the circuit board is used to install electrical components such as the MCU chip, the AD chip, resistors, capacitors, etc., and to connect the circuits of components such as the battery, the display screen, the input keyboard, the sensors, the solenoid valve, the motor, and the power supply.

[0011] An operating method for a handheld device for measuring the gap between elevator doors and the strength of elevator shaft walls, the operating method comprising the following steps:

[0012] First step, preparation: Turn on the power switch, and input the thrust value of the cylinder using the input keyboard. At this time, the MCU chip receives the thrust value of the cylinder input by the operator and converts it into the corresponding gas pressure set value, and displays the set thrust value of the cylinder and the gas pressure value on the display screen;

[0013] When measuring the gap at the most unfavorable point of the elevator door, insert the fixed plug plate and the push plate that are fitted together into the gap at the most unfavorable point of the elevator door in the closed state;

[0014] When measuring the strength of the elevator shaft wall, press the outer end face of the screw cap against the surface of the measured shaft wall, and the outer end face of the screw cap is in uniform contact with the surface of the shaft wall, and the cylinder plunger is perpendicular to the surface of the measured shaft wall; the housing of this device should be kept in a non-movable position (the position of the housing can be kept immovable by means of the elevator car structure).

[0015] Second step, start the test: After pressing the "Start Test" key in the middle of the input keyboard, the motor of the micro-booster air pump starts to work. The pressure sensor monitors the gas pressure in the cylinder, and the analog signal output by it is converted into a digital signal by the AD chip and then sent to the MCU chip for further processing; when the monitored value of the gas pressure in the cylinder is not lower than the set pressure value, the MCU chip controls the motor to stop running; when the monitored value of the gas pressure in the cylinder exceeds the set pressure value, the MCU chip controls the solenoid valve to open to release the gas in the cylinder until the gas pressure in the cylinder is equal to the set pressure value and then controls the solenoid valve to close; when the monitored value of the gas pressure in the cylinder is lower than the set pressure value, the MCU chip controls the motor to drive the micro-booster air pump to work; during the test, the display screen displays the dynamic gas pressure value, cylinder thrust value and displacement value of the push plate in the cylinder;

[0016] Third step, display the test result: When the MCU chip determines that the monitored value of the gas pressure in the cylinder can stably equal the set pressure value, that is, it determines that the test is completed, the display screen prompts that the test is completed and displays the measured gas pressure value, cylinder thrust value and push plate displacement value.

[0017] The beneficial effects of the present invention are: This device has the advantages of small volume, light weight, simple operation, high working efficiency and high measurement accuracy; it solves the disadvantages of low working efficiency, inconvenient operation and low measurement accuracy of the traditional method for measuring the gap at the most unfavorable point of the elevator; it also solves the disadvantages of complex equipment, large volume, heavy weight and poor reliability of some existing special measuring devices; it can provide a special measuring tool that can be conveniently used at the actual use site of the elevator for measuring the strength of the shaft wall. Description of the Drawings

[0018] Figure 1 Schematic diagram of the structure of the present invention;

[0019] Figure 2 is Figure 1 sectional view of;

[0020] Figure 3 Electrical principle structure diagram of the present invention;

[0021] Figure 4 Application scenario diagram of the present invention for measuring the clearance at the most unfavorable point of the elevator door;

[0022] Figure 5 Application scenario diagram of the present invention for measuring the strength of the elevator shaft wall;

[0023] Wherein: 1. Housing, 2. Screw cap, 3. Push plate, 4. Linear displacement sensor, 5. Battery, 6. Micro air booster pump, 8. Cylinder, 9, Display screen, 10. Power switch, 11. Input keyboard, 12. Fixed plug board, 13. Elevator door, 14. Elevator shaft wall. Specific embodiments

[0024] This embodiment is a handheld device for measuring the clearance of the elevator door and the strength of the elevator shaft wall, which is composed of a housing (1), a pneumatic drive system and an electrical control system. The pneumatic drive system is composed of a screw cap (2), a push plate (3), a cylinder (8), a micro air booster pump (6), pipelines, an overflow valve, etc. The electrical control system is composed of a battery (5), a motor of the micro air booster pump, an MCU chip, an AD chip, a linear displacement sensor (4), a pressure sensor, a solenoid valve, a circuit board, an input keyboard (11), a display screen (9), a power switch (10), etc.

[0025] As Figure 1 、 Figure 2 shown, the housing (1) is a cuboid structure with a hollow interior. The front of the housing (1) is provided with a display screen (9), a power switch (10) and an input keyboard (11). The side of the housing (1) is provided with a rectangular hole, and a fixed plug board (12) for easily inserting into the elevator door clearance is provided below the rectangular hole. The cylinder (8) is fixed inside the housing (1), and the plunger of the cylinder (8) extends out of the housing (1) through the rectangular hole and is fixedly connected to the push plate (3) by a screw cap (2) with an outer end face area of 5 cm 2 A linear displacement sensor (4) is arranged inside the housing (1). The measuring rod of the linear displacement sensor (4) extends out of the housing (1) through the rectangular hole and is fixedly connected to the push plate (3) by screws. The measuring rod of the linear displacement sensor (4) follows the telescopic movement of the plunger of the cylinder (8); A battery (5), a motor and a micro air booster pump (6) are also arranged inside the housing (1), and the micro air booster pump (6) is connected to the cylinder (8) by a gas circuit.

[0026] As Figure 3 shown, the electrical control system consists of a battery (5), an MCU chip, an AD chip, a linear displacement sensor (4), a pressure sensor, a solenoid valve, a circuit board, an input keyboard (11), a display screen (9), a power switch (10), etc. The battery (5) supplies power to a micro-booster air pump, a pressure sensor, a linear displacement sensor (4), an AD chip, and an MCU chip respectively. Among them, the AD chip is connected to the pressure sensor, the linear displacement sensor (4), and the MCU chip. The MCU chip is respectively connected to the motor of the micro-booster air pump, the solenoid valve, the input keyboard (11), and the display screen (9).

[0027] An operation method of a handheld device for measuring the gap of an elevator door and the strength of an elevator shaft wall, the operation method comprising the following steps:

[0028] The first step, preparation: Turn on the power switch (10), input the thrust value of the cylinder (8) with the input keyboard (11). At this time, the MCU chip receives the thrust value of the cylinder input by the operator and converts it into a corresponding gas pressure set value, and the set cylinder thrust value and gas pressure value are displayed on the display screen (9).

[0029] As Figure 4 shown, when measuring the gap size at the most unfavorable point of the elevator, set the thrust value of the cylinder to 150 N. Insert the fixed plug board (12) and the push board (3) that are fitted together into the gap at the most unfavorable point of the closed elevator door (13).

[0030] As Figure 5 shown, when measuring the strength of the elevator shaft wall, set the thrust value of the cylinder (8) to 300 N. Press the outer end face of the screw cap (2) against the surface of the measured elevator shaft wall (14), and the outer end face of the screw cap (2) is in uniform contact with the surface of the elevator shaft wall (14). The plunger of the cylinder (8) is perpendicular to the surface of the measured elevator shaft wall (14); the housing (1) of the device should be kept in a non-movable position;

[0031] The second step, start the test: After pressing the "Start Test" key in the middle of the input keyboard, the motor drives the micro-booster air pump (6) to start working. The pressure sensor monitors the gas pressure in the cylinder, and its output analog signal is converted into a digital signal by the AD chip and then sent to the MCU chip for further processing; when the cylinder (8)

[0032] When the monitored pressure value of the internal gas is not lower than the set pressure value, the MCU chip controls the motor to stop running; when the monitored pressure value of the gas in the cylinder (8) exceeds the set pressure value, the MCU chip controls the solenoid valve to open and release the gas in the cylinder (8) until the gas pressure in the cylinder (8) equals the set pressure value, and then controls the solenoid valve to close; when the monitored pressure value of the gas in the cylinder (8) is lower than the set pressure value, the MCU chip controls the motor to drive the micro-booster pump to work; during the test, the display screen (9) shows the dynamic pressure value of the gas in the cylinder (8), the thrust value of the cylinder (8), and the displacement value of the push plate (3).

[0033] Step 3, display the test results: When the MCU chip determines that the monitored pressure value of the gas in the cylinder (8) can stably equal the set pressure value, that is, it determines that the test is completed. The display screen (9) prompts that the test is completed and shows the measured gas pressure value, cylinder thrust value, and push plate displacement value. The displayed push plate displacement value is the elevator door gap size when opening the elevator door with a force of 150 N at the most unfavorable point of the elevator door, or the elastic deformation amount of the hoistway wall when a force of 300 N acts uniformly on an area of 5 cm 2 square.

Claims

1. A handheld device for measuring the clearance of elevator doors and the strength of elevator shaft walls, characterized in that It consists of a housing, a pneumatic drive system and an electrical control system. The pneumatic drive system consists of a screw cap, a push plate, a cylinder, a micro booster air pump, a pipeline and a relief valve. The electrical control system consists of a battery, a motor of the micro booster air pump, an MCU chip, an AD chip, a linear displacement sensor, a pressure sensor, a solenoid valve, a circuit board, an input keyboard, a display screen and a power switch. The housing is a cuboid structure with a hollow interior. The front of the housing is provided with a display screen, a power switch and an input keyboard. The side of the housing is provided with a rectangular hole. The cylinder is fixed inside the housing. The plunger of the cylinder extends out of the housing through the rectangular hole and is fixedly connected to the push plate by a screw cap. A linear displacement sensor is arranged inside the housing. The measuring rod of the linear displacement sensor extends out of the housing through the rectangular hole and is fixedly connected to the push plate by a screw. The measuring rod of the linear displacement sensor follows the telescopic movement of the cylinder plunger. The micro booster air pump and the cylinder are connected by a pipeline through a gas path. A fixed insertion plate is provided below the rectangular hole for facilitating insertion into the gap of the elevator door. The outer end face area of the screw cap used for connecting the cylinder plunger and the push plate is 5 cm 2 ; The battery is respectively connected to the motor of the micro booster air pump, the pressure sensor, the linear displacement sensor, the AD chip and the MCU chip to provide power. Among them, the AD chip is connected to the pressure sensor, the linear displacement sensor and the MCU chip, and the MCU chip is connected to the micro booster air pump, the solenoid valve, the input keyboard and the display screen circuit.

2. An operating method for a handheld device for measuring the gap between elevator doors and the strength of elevator shaft walls according to claim 1, characterized in that The operation method includes the following steps: First step, preparation: Turn on the power switch and input the cylinder thrust value using the input keyboard. At this time, the MCU chip receives the cylinder thrust value input by the operator and converts it into the corresponding gas pressure setting value, and the display screen shows the set cylinder thrust value and gas pressure value; When measuring the gap at the most unfavorable point of the elevator door, set the thrust value of the cylinder to 150 N, and insert the fixed plug plate and the push plate that are fitted together into the gap at the most unfavorable point of the elevator door in the closed state; When measuring the strength of the elevator shaft wall, set the thrust value of the cylinder to 300 N, press the outer end face of the screw cap against the surface of the measured shaft wall, and the two planes are in uniform contact. The cylinder plunger is perpendicular to the surface of the measured shaft wall; keep the housing of this device in a non-movable position; Second step, start the test: After pressing the "Start Test" key in the middle of the input keyboard, the micro booster pump starts to work. The pressure sensor monitors the gas pressure in the cylinder, and the analog signal output by it is converted into a digital signal by the AD chip and then sent to the MCU chip for further processing; when the monitored value of the gas pressure in the cylinder is not lower than the set pressure value, the MCU chip controls the motor of the micro booster pump to stop running; when the monitored value of the gas pressure in the cylinder exceeds the set pressure value, the MCU chip controls the solenoid valve to open and release the gas in the cylinder until the gas pressure in the cylinder is equal to the set pressure value and then controls the solenoid valve to close; when the monitored value of the gas pressure in the cylinder is lower than the set pressure value, the MCU chip controls the motor of the micro booster pump to work; during the test, the display screen shows the dynamic gas pressure value, cylinder thrust value and displacement value of the push plate in the cylinder; Third step, display the test result: When the MCU chip determines that the monitored value of the gas pressure in the cylinder can stably equal the set pressure value, that is, it determines that the test is completed, the display screen prompts that the test is completed and shows the measured gas pressure value, cylinder thrust value and push plate displacement value.

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