Device for detecting mechanical strength of car wall of elevator car

Abstract

The utility model relates to a device for detecting the mechanical strength of a car wall of an elevator car, which solves the problems of large limitation, large error and tedious detection of the existing detection mode of the car wall of the elevator car. The device comprises a supporting plate, a plurality of supporting rods are evenly arranged on the periphery of the supporting plate, the right end of each supporting rod is provided with a suction cup for sucking a car wall with the car wall facing the right, a center hole is formed in the center of the supporting plate, and a connecting block is fixed to the right side of the supporting plate; a screw adjustably penetrates through the middle hole of the supporting plate and the middle hole of the connecting block, the right end of the screw is connected with a pressure displacement sensor, the right end of the pressure displacement sensor is connected with a pressure conduction gasket, the pressure conduction gasket abuts against the car wall, and the left end of the screw is a handle connecting end. According to the utility model, the detection work can be completed by a single detector, the detection position can be more flexibly selected on the car wall, and the accuracy of the detection result is higher.

Description

Technical Field

[0001] This utility model belongs to the field of elevator testing technology, and in particular relates to a mechanical strength testing device for elevator car walls. Background Technology

[0002] Elevators are common equipment in high-rise buildings. They carry passengers vertically between different floors via a car. The car walls are enclosed structures, and their mechanical strength must meet certain requirements to ensure safety. According to Clause 5.4.3.2.2 of GB / T 7588.1-2020, the mechanical strength of the car walls should meet the following requirements:

[0003] a) Capable of withstanding a static force of 300N acting perpendicularly from inside the car to outside the car wall at any location and uniformly distributed over a circular (or square) area of ​​5cm², and:

[0004] 1) Permanent deformation not exceeding 1mm;

[0005] 2) Elastic deformation is not greater than 15mm.

[0006] b) It can withstand a static force of 1000N acting vertically from inside the car to outside the car wall at any position and evenly distributed over a circular (or square) area of ​​100cm², and the permanent deformation is no greater than 1mm.

[0007] Current safety technical specifications have relatively few requirements for testing the car wall strength of elevators in use. Currently, in the industry, methods for testing car wall strength include using a push-pull force gauge with shims, and another method involving stretching a long rod supported at both ends of the car wall for measurement.

[0008] The push-pull force gauge + shim method is the most primitive method, which directly measures according to standard requirements. Its drawbacks are that it is difficult to achieve a static force of 300 or 1000 Newtons using a push-pull force gauge, and large fluctuations are likely to occur during the measurement process; secondly, when measuring the deformation of the car wall, another inspector is required to assist in measuring the deformation, and it is impossible to measure the location of the maximum deformation, so there will be a large measurement error.

[0009] For the long rod tension support method, the degree of freedom in selecting the measurement position on the car wall is not high. It needs to be supported by both sides to make the support rod stable in order to carry out effective measurement. When measuring the car wall on the opposite side of the car door, the measurement may fail due to the car door opening unexpectedly. Utility Model Content

[0010] The purpose of this invention is to solve the problems of existing elevator car wall inspection methods being limited, having large errors, and being cumbersome. It provides a mechanical strength inspection device for elevator car walls, which allows for arbitrary selection of inspection positions, quick positioning using a suction cup, single-person operation, and high measurement accuracy.

[0011] The technical solution adopted by this utility model to solve its technical problem is: a mechanical strength testing device for elevator car walls, including a support plate, a plurality of support rods evenly arranged around the circumference of the support plate, with the direction towards the car wall as the right, and a suction cup for adsorbing the car wall provided at the right end of the support rod, a central hole opened in the center of the support plate and a connecting block fixed on the right side, the center of the connecting block being aligned with the center of the support plate and having a central hole, a screw rod being adjustablely inserted through the central hole of the support plate and the central hole of the connecting block, the right end of the screw rod being connected to a pressure displacement sensor, the right end of the pressure displacement sensor being connected to a pressure transmission pad, the pressure transmission pad abutting against the car wall, and the left end of the screw rod being a handle connection end.

[0012] The suction cups are made of silicone or rubber to ensure adhesion. Each suction cup is evenly distributed to ensure uniform load distribution. Select a suitable suction cup size (e.g., 80mm-100mm in diameter) based on the flatness of the wall surface. The static load on the car wall is adjusted using a screw, and a pressure displacement sensor detects when the static load reaches the target value. After reaching the target static load, the deformation of the car wall is measured.

[0013] Preferably, the connecting block has a stepped hole with a smaller left section and a larger right section, and a thrust slider is slidably installed on the right section of the connecting block's central hole. The right end of the screw is connected to a pressure displacement sensor through the thrust slider.

[0014] Preferably, one of the holes in the support plate and the connecting block is a threaded hole adapted to the screw.

[0015] Preferably, the support rod is arranged perpendicular to the support plate.

[0016] Preferably, 3-4 support rods are arranged around the circumference of the support plate.

[0017] Preferably, the pressure displacement sensor is provided with an elastic loading measuring head at its right end, and the elastic loading measuring head is inserted into the center of the left side of the pressure transmission pad.

[0018] Preferably, the pressure transmission pad includes sizes with an area of ​​5 cm² and 100 cm².

[0019] Preferably, the pressure-conducting pad is circular or square.

[0020] Preferably, the pressure transmission gasket is a rigid gasket.

[0021] Preferably, the pressure transmission pad is made of stainless steel or aluminum alloy.

[0022] This invention allows a single inspector to complete the inspection work, provides greater flexibility in selecting inspection locations on the car wall, and results in more accurate inspection results. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is a structural diagram of the adjacent surfaces of a car door and a landing door.

[0025] In the diagram: 1. Support plate, 2. Connecting block, 3. Screw, 4. Thrust slider, 5. Support rod, 6. Suction cup, 7. Pressure transmission pad, 8. Pressure displacement sensor. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0027] Example: A mechanical strength testing device for elevator car walls, such as... Figure 1 As shown. This device includes a support plate 1, with four support rods 5 evenly arranged around its circumference, perpendicular to the support plate. With the direction towards the car wall as the right, a suction cup 6 is provided at the right end of each support rod 5 to adhere to the car wall. The suction cup is made of silicone to ensure sufficient adhesion to the car wall. A central hole is opened in the center of the support plate 1, and a connecting block 2 is fixed to its right side. The center of the connecting block 2 is aligned with the center of the support plate 1. Adjustable screws 3 are inserted through the central holes of the support plate 1 and the connecting block 2. The central hole of the support plate 1 is a smooth hole, while the central hole of the connecting block 2 is a stepped hole with a smaller left section and a larger right section. The left section of the central hole of the connecting block is a threaded hole adapted to the screw 3, and the right section of the central hole of the connecting block serves as a guide hole, with a thrust slider slidingly mounted inside. The right end of the screw 3 is sequentially connected to a thrust slider 4, a pressure displacement sensor 8, and a pressure transmission pad 7. The left end of the screw 3 is the handle connection end.

[0028] The pressure displacement sensor 8 can be a commonly available pressure displacement sensor. An elastic loading measuring head is located on the right end of the pressure displacement sensor 8, and this head is inserted into the center of the left side of the pressure transmission pad 7. The right side of the pressure transmission pad 7 rests against the car wall to be measured. The pressure transmission pad 7 is available in sizes with an area of ​​5 cm² and 100 cm². The pressure transmission pad is round or square and made of stainless steel or aluminum alloy.

[0029] This device allows a single person to perform mechanical strength testing on the elevator car walls. The testing position can be freely selected. After selecting the position, each suction cup is firmly attached to the car wall. Then, the loading force is adjusted by rotating the screw until the target static force is reached. Finally, the deformation of the car wall is measured.

Claims

1. A mechanical strength testing device for elevator car walls, characterized in that: The system includes a support plate with several support rods evenly arranged around its circumference, with the direction towards the car wall as the right. The right end of each support rod is equipped with a suction cup for adhering to the car wall. The support plate has a central hole and a connecting block is fixed on its right side. The center of the connecting block is aligned with the center of the support plate. A screw is adjustablely inserted through the central hole of the support plate and the central hole of the connecting block. The right end of the screw is connected to a pressure displacement sensor, and the right end of the pressure displacement sensor is connected to a pressure transmission pad. The pressure transmission pad rests against the car wall. The left end of the screw is the handle connection end.

2. The mechanical strength testing device for elevator car walls according to claim 1, characterized in that: The connecting block has a stepped hole with a smaller left section and a larger right section. A thrust slider is slidably installed on the right section of the connecting block's central hole. The right end of the screw is connected to a pressure displacement sensor via the thrust slider.

3. The mechanical strength testing device for elevator car walls according to claim 1, characterized in that: One of the holes in the support plate and the connecting block is a threaded hole adapted to the screw.

4. The mechanical strength testing device for elevator car walls according to claim 1, characterized in that: The support rod is set perpendicular to the support plate.

5. The mechanical strength testing device for elevator car walls according to claim 1, characterized in that: The support rods are arranged in 3-4 pieces around the circumference of the support plate.

6. The mechanical strength testing device for elevator car walls according to claim 1, characterized in that: The pressure displacement sensor is equipped with an elastic loading measuring head on its right end, which is inserted into the center of the left side of the pressure transmission pad.

7. The mechanical strength testing device for elevator car walls according to claim 1, characterized in that: The pressure-conducting pads are available in sizes with an area of ​​5 cm² and 100 cm².

8. The mechanical strength testing device for elevator car walls according to claim 1, characterized in that: The pressure-conducting pad is circular or square.

9. The mechanical strength testing device for elevator car walls according to claim 1, characterized in that: The pressure transmission gasket is a rigid gasket.

10. The mechanical strength testing device for elevator car walls according to claim 9, characterized in that: The pressure transmission pad is made of stainless steel or aluminum alloy.

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