Elevator testing method

Abstract

The invention particularly relates to an elevator testing method. According to the elevator testing method, static testing is carried out according to national standard regulations. An empty lift car is prevented to the bottom layer position, a hook is fixed to the lift car bottom, a pulley block is fixed to the pit ground or the well wall, an electronic scale or a tension meter and a sling chain or a push rod or a jack are connected through a chain, the numerical value of the electronic scale or the tension meter is read and compared with the corresponding calculated numerical value, and whether the device is qualified or not is determined. The method has the remarkable advantages that static measurement is achieved, and damage is avoided; efficiency is high and cost is low.

Description

Technical Field

[0001] It involves the test method of elevator balance coefficient, the test method of elevator overload protection device, the test method of elevator braking performance, the test method of elevator traction capacity, and the test method of elevator safety gear operation. Background Art

[0002] 1. Existing elevator balance coefficient test technology and problems.

[0003] The existing elevator balance coefficient test method is to run up and down the whole process with different loads, measure the up and down running currents of the elevator main machine, draw the up and down running current curves, and indirectly measure the elevator balance coefficient. The specific problems are as follows: (1) Different loads require tests with weights of corresponding masses. The rental and handling costs of weights are high, the process is complicated, and the work is heavy; (2) The indirect measurement method results in inaccurate results.

[0004] 2. Existing elevator overload protection device test technology and problems.

[0005] The existing elevator overload protection device test method is to conduct tests by loading weights of corresponding masses. The specific problems are as follows: The rental and handling costs of weights are high, the process is complicated, and the work is heavy.

[0006] 3. Existing elevator braking performance test technology and problems.

[0007] The existing elevator braking performance test method is to load weights of 125% of the rated load, the elevator runs downward at the rated speed, and the power supply is cut off for the test. The specific problems are as follows: (1) The rental and handling costs of weights are high, the process is complicated, and the work is heavy; (2) This kind of test is a destructive test.

[0008] 4. Existing elevator traction capacity test technology and problems.

[0009] The existing elevator braking performance test method is to load weights of 125% of the rated load, the elevator runs downward at the rated speed, and the power supply is cut off for the test. The specific problems are as follows: (1) The rental and handling costs of weights are high, the process is complicated, and the work is heavy; (2) This kind of test is a destructive test.

[0010] 5. Existing elevator safety gear performance test technology and problems.

[0011] The existing elevator braking performance test method is to load weights of 125% of the rated load, the elevator runs downward at the rated speed, and the speed limiter is manually operated to make the safety gear operate for the test. The specific problems are as follows: (1) The cost of renting and transporting weights is high, the process is complicated, and the work is heavy. (2) This kind of test is a destructive test. Summary of the Invention

[0012] The related elevator test method, the specific related technical solution is as follows: 1. Elevator balance coefficient test method. Place the empty car at the bottom position, fix a hook on the movable car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer through a chain. Slowly release the traction machine brake, and after the car and the counterweight are stable, read the value d of the electronic scale or the dynamometer. The balance coefficient q = (d×n) / Q × 100%, ( Q— Rated load, n—Traction ratio ). The distinguishing features are as follows: (1) The existing elevator balance coefficient test method is to run up and down the whole process with different loads. By measuring the up and down running current of the main machine when the elevator passes through the middle floor and drawing the up and down current curves, the elevator balance coefficient is indirectly measured, and the result is less accurate.

[0013] (2) The cost of renting and transporting weights is high, the process is complicated, and the work is heavy.

[0014] The substantial features of the technical solution of the present invention: According to the balance coefficient definition q = (G-P) / Q×100% for static test, directly measured by weighing.

[0015] q——Elevator balance coefficient; G——Counterweight mass, in kilograms (kg); P——Sum of the mass of the empty car and the components supported by the car, in kilograms (kg); Q——Rated load, in kilograms (kg).

[0016] The beneficial effects of the technical solution of the present invention: (1) According to the elevator balance coefficient definition for static test, directly measured by weighing, the result is accurate; (2) The process is simple and the work is easy; (3) High efficiency and low cost.

[0017] 2. Elevator overload protection device test method. Place the empty car at the bottom position, fix a hook on the movable car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a hanging chain or a push rod or a jack through a chain. Slowly tighten the hanging chain or the push rod or the jack. When the overload device operates, read the value d of the electronic scale or the dynamometer. d×the number of force-bearing chains of the pulley block = the elevator overload mass value. The distinguishing features are as follows: It is necessary to use weights of corresponding mass for the test. The cost of renting and transporting weights is high, the process is complicated, and the work is heavy.

[0018] Substantive features of the technical solution of the present invention: According to the national standard regulations, it is measured by direct weighing in static testing.

[0019] Beneficial effects of the technical solution of the present invention: (1) The process is simple and the work is easy. (2) High efficiency and low cost.

[0020] 3. Elevator braking performance test method. According to "GB T 7588.2-2020, 5.11.2.2.2 The dynamic ratio of T1 / T2 in the emergency braking condition should be calculated according to the most unfavorable conditions of the car load condition (the car is empty or loaded with the rated load) and the different positions of the car in the hoistway. Considering the elevator suspension ratio, the deceleration of each moving part should be correctly determined. In any case, the deceleration should not be less than the following values: a) Under normal circumstances, it is 0.5m / s 2 " requirement. According to Newton's second law F = ma, with a taking the value of 0.5, that is The minimum braking force F = (P + Q×125%)×(g n + a) - G×g n G——Counterweight mass, in kilograms (kg); P——Sum of the mass of the empty car and the components supported by the car, in kilograms (kg); Q——Rated load, in kilograms (kg); g n ——Acceleration due to gravity.

[0021] Place the empty car at the bottom position, fix a hook on the car floor, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a lifting chain or a push rod or a jack through a chain. Slowly tighten the lifting chain or the push rod or the jack. When the corresponding value of the electronic scale or the dynamometer reaches the F value, the elevator car does not move, which is qualified. The distinguishing features are as follows: The existing elevator braking performance test method is to load weights of 125% of the rated load, the elevator runs downward at the rated speed, and the power is cut off for the test. The specific problems are as follows: (1) The cost of renting and transporting weights is high, the process is complicated, and the work is heavy. (2) This kind of test is a destructive test. Substantive features of the technical solution of the present invention: According to the national standard regulations, it is measured by direct weighing in static testing.

[0022] Beneficial effects of the technical solution of the present invention: (1) The process is simple and the work is easy. (2)Static measurement, non-destructive; (3)High efficiency and low cost.

[0023] 4. Elevator traction capacity test method. According to the requirement of "GB T 7588.1-2020, 5.9.2.2.2.1 When the car is carrying 125% of the rated load and running downward at the rated speed, the driving main machine should be able to be stopped only by the brake. In the above situation, the average deceleration of the car should not be greater than the deceleration generated when the safety gear operates or the car hits the buffer." According to Newton's second law F = ma, a is taken as 0.5, that is The minimum braking force F = (P + Q×125%)×(g n +a) - G×g n G——Counterweight mass, in kilograms (kg); P——Sum of the mass of the empty car and the components supported by the car, in kilograms (kg); Q——Rated load, in kilograms (kg); g n ——Acceleration due to gravity. Place the empty car at the bottom floor position, fix a hook on the car bottom, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a hanging chain or a push rod or a jack through a chain. Slowly tighten the hanging chain or the push rod or the jack. When the corresponding value of the electronic scale or the dynamometer reaches the F value, the elevator car does not move, which is qualified. The distinguishing features are as follows: The existing elevator braking performance test method is to load weights of 125% of the rated load, the elevator runs downward at the rated speed, and the power is cut off for the test. The specific problems are as follows: (1)High cost for weight rental and handling, complicated process, and heavy work; (2)This kind of test is a destructive test. The substantial features of the technical solution of the present invention: According to the national standard regulations, static test, directly measured by weighing.

[0024] The beneficial effects of the technical solution of the present invention: (1)Static test, directly measured by weighing, simple process, and easy work; (2)Static measurement, non-destructive; (3)High efficiency and low cost.

[0025] 5. Elevator safety gear performance test method. According to GB T 7588.1-2020, 5.6.2.1.3 Deceleration, when the car or counterweight (or balance weight) carrying the rated load is in free fall, the average deceleration during the braking of the progressive safety gear should be 0.2g n ~1.0gn "Requirement. According to Newton's second law F = ma, a takes the value of 0.2g n , that is The minimum braking force F = (P + Q×125%)×(g n + 0.2g n ) - G×g n G——Counterweight mass, in kilograms (kg); P——Sum of the mass of the empty car and the components supported by the car, in kilograms (kg); Q——Rated load, in kilograms (kg); g n ——Acceleration due to gravity.

[0026] Place the empty car at the bottom position, fix a hook on the car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a hanging chain or a push rod or a jack through a chain. Manually activate the safety gear, release the brake, and slowly tighten the hanging chain or the push rod or the jack. When the corresponding value on the electronic scale or the dynamometer reaches the F value, the elevator car does not move, which is qualified.

[0027] The distinguishing features are as follows: Prior art: The existing elevator braking performance test method is to load weights of 125% of the rated load, and the elevator descends at the rated speed, and manually activate the safety gear for the test. The specific problems are as follows: (1) The rental and handling costs of the weights are high, the process is complicated, and the work is heavy; (2) This kind of test is a destructive test. The substantial features of the technical solution of the present invention: According to the national standard regulations, it is a static test and is directly measured by weighing.

[0028] The beneficial effects of the technical solution of the present invention: (1) It is a static test, directly measured by weighing, the process is simple, and the work is easy; (2) It is a static measurement and is non-destructive; (3) It has high efficiency and low cost. Specific implementation mode

[0029] The corresponding elevator test method and the specific implementation modes of the specific related technologies are described as follows: 1. Elevator balance coefficient test method. Place the empty car at the bottom position, fix a hook on the movable car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer through a chain. Slowly release the traction machine brake, and after the car and the counterweight are stable, read the value d on the electronic scale. The balance coefficient q = (d×n) / Q×100%, (Q - rated load, n - traction ratio).

[0030] 2. Test method for elevator overload protection device. Place the empty car at the bottom position, fix a hook on the movable car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a hanging chain or a push rod or a jack through a chain. Slowly tighten the hanging chain or the push rod or the jack. When the overload device operates, read the value d on the electronic scale, and d × the number of force-bearing chains of the pulley block = the elevator overload mass value.

[0031] 3. Test method for elevator braking performance. According to Newton's second law F = ma, where a is taken as 0.5, that is The minimum braking force F = (P + Q × 125%) × (g n + a) - G × g n Place the empty car at the bottom position, fix a hook on the car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a hanging chain or a push rod or a jack through a chain. Slowly tighten the hanging chain or the push rod or the jack. When the corresponding value on the electronic scale or the dynamometer reaches the value of F, the elevator car does not move, which is considered qualified.

[0032] 4. Test method for elevator traction capacity. According to Newton's second law F = ma, where a is taken as 0.5, that is The minimum braking force F = (P + Q × 125%) × (g n + a) - G × g n Place the empty car at the bottom position, fix a hook on the car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a hanging chain or a push rod or a jack through a chain. Slowly tighten the hanging chain or the push rod or the jack. When the corresponding value on the electronic scale or the dynamometer reaches the value of F, the elevator car does not move, which is considered qualified.

[0033] 5. Test method for elevator safety gear performance. According to Newton's second law F = ma, where a is taken as 0.2g n , that is The minimum braking force F = (P + Q × 125%) × (g n + 0.2g n ) - G × g n Place the empty car at the bottom position, fix a hook on the car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a hanging chain or a push rod or a jack through a chain. Manually operate the safety gear to actuate, release the elevator brake, slowly tighten the hanging chain or the push rod or the jack. When the corresponding value on the electronic scale or the dynamometer reaches the value of F, the elevator car does not move, which is considered qualified.

Claims

1. A method for detecting the balance coefficient of an elevator, characterized in that: Place the empty car at the bottom position. Fix the hook on the movable car floor of the car. Fix the pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer through a chain. Slowly release the brake of the traction machine. After the car and the counterweight are stable, read the value d of the electronic scale or the dynamometer. The balance coefficient q = (d × n) / Q × 100%,( Q — Rated load capacity, n — Traction ratio ).

2. The elevator balance coefficient detection method of claim 1 is measured by direct weighing through static testing in accordance with national standards regulations.

3. Detection method for elevator overload protection device, characterized in that: Place the empty car at the bottom floor position, fix a hook on the movable car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a suspension chain or a push rod or a jack through a chain. Slowly tighten the suspension chain or the push rod or the jack. When the overload device operates, read the value d of the electronic scale. d × the number of force-bearing chains of the pulley block = the elevator overload mass value.

4. The elevator overload protection device detection method of claim 3 is measured by direct weighing through static testing in accordance with national standards regulations.

5. Elevator braking performance detection method, characterized in that: At the bottom position of the empty car, fix a hook on the car bottom. Fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a lifting chain or a push rod or a jack through a chain. Slowly tighten the lifting chain or the push rod or the jack. When the corresponding value of the electronic scale or the dynamometer reaches the F value and the elevator car does not move, it is qualified. 【F = (P + Q×125%)×(g n + a) - G×g n , G — Counterweight mass, unit: kilogram (kg) P — The sum of the mass of the empty car and the components supported by the car, unit: kilogram (kg), Q — Rated load, unit kilogram (kg) 】。 6. The elevator braking performance detection method of claim 5 is measured by direct weighing through static testing in accordance with national standards regulations.

7. Detection method for elevator traction capacity, characterized in that: At the bottom position of the empty car, fix a hook on the car bottom. Fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a lifting chain or a push rod or a jack through a chain. Slowly tighten the lifting chain or the push rod or the jack. When the corresponding value of the electronic scale or the dynamometer reaches the F value and the elevator car does not move, it is qualified. 【F = (P + Q×125%)×(g n + a) - G×g n , G — Counterweight mass, unit: kilogram (kg) P — The sum of the mass of the empty car and the components supported by the car, unit: kilogram (kg), Q — Rated load, unit kilogram (kg) 】。 8. The elevator traction capacity detection method of claim 7 is measured by direct weighing through static testing in accordance with national standards regulations.

9. Method for detecting the performance of an elevator safety gear, characterized in that: Place the empty car at the bottom floor position, fix a hook on the car bottom of the car, fix a pulley block on the bottom pit floor or the hoistway wall, and connect an electronic scale or a dynamometer and a lifting chain or a push rod or a jack through a chain. Manually operate the safety gear to actuate, release the brake, and slowly tighten the lifting chain or the push rod or the jack. When the corresponding value of the electronic scale or the dynamometer reaches the F value and the elevator car does not move, it is considered qualified. 【F = (P + Q×125%)×(g n + 0.2 g n ) - G×g n , G — Counterweight mass, unit: kilogram (kg), P — The sum of the mass of the empty car and the components supported by the car, unit kilogram (kg), Q — Rated load, unit: kilogram (kg) 】。 10. The elevator safety gear performance detection method of claim 9 is measured by direct weighing through static testing in accordance with national standards regulations.