A testing method and system for the interlock test of an elevator speed limiter and safety gear

Abstract

The present invention relates to the technical field of elevator speed governor and safety gear linkage test and detection, and in particular to an elevator speed governor and safety gear linkage test and detection method and system, which includes the following steps: S1: Perform the elevator speed governor and safety gear linkage test. If the safety gear fails to act, collect the pulling force of the steel wire rope placed on the elevator speed governor and the safety gear in the slipping state; S2: Determine whether the pulling force of the collected steel wire rope is within the preset threshold range; if so, the test result is that the safety gear is abnormal; if not, the test result is that the speed governor is abnormal. By comparing the measured pulling force of the steel wire rope with the preset threshold, the working state of the speed governor and safety gear can be quickly judged, and the main reason for the failure of the safety gear to act in the elevator speed governor and safety gear linkage test can be found out.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator overspeed governor and safety gear linkage test and detection, and particularly relates to a method and a system for elevator overspeed governor and safety gear linkage test and detection. Background Art

[0002] The overspeed governor and safety gear linkage system is a very important safety component in an elevator. However, except for setting and calibrating the pulling force of the overspeed governor and the maximum pulling force required for the safety gear to act during type tests and at the beginning of production, subsequent quantification verification has not been carried out during installation, maintenance, and inspection. Due to factors such as component wear and improper maintenance, these two parameters may change during use, which may lead to the failure of the overspeed governor and safety gear linkage system to act reliably, posing serious safety hazards.

[0003] During the overspeed governor and safety gear linkage test after the elevator is put into use, only the effectiveness of the overspeed governor and safety gear actions is verified. If the overspeed governor and safety gear linkage test fails, it may be due to the following three reasons: 1. The operating speed of the overspeed governor is not correctly calibrated, resulting in abnormal operation; 2. The pulling force of the overspeed governor is insufficient; 3. The safety gear is improperly adjusted. The problem of overspeed governor calibration can be adjusted and verified by using a special verification instrument. However, the problems of insufficient pulling force of the overspeed governor and safety gear adjustment can generally only be discovered through the linkage test and mainly rely on experience judgment. After the test adjustment, it is judged whether it is effective, and it is only judged by whether the linkage test is successful again. Relying solely on experience judgment cannot meet the requirements of the national standard for the pulling force of the overspeed governor. Therefore, it is very necessary to design an inspection method for quantitative analysis. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a method and a system for elevator overspeed governor and safety gear linkage test and detection, which can accurately obtain the reasons for the failure of the safety gear to act in the overspeed governor and safety gear linkage test through quantitative analysis, so as to improve the maintenance efficiency.

[0005] To solve the above technical problem, a technical solution adopted by the present invention is:

[0006] An elevator overspeed governor and safety gear linkage test and detection method, comprising the following steps:

[0007] S1: Perform an elevator overspeed governor and safety gear linkage test. If the safety gear fails to act, collect the pulling force of the steel wire rope placed on the elevator overspeed governor and the safety gear in a slipping state.

[0008] S2: Judge whether the collected pulling force of the steel wire rope is within a preset threshold range; if so, the detection result is that the safety gear is abnormal; if not, the detection result is that the overspeed governor is abnormal.

[0009] Another technical solution adopted by the present invention is as follows:

[0010] An elevator overspeed governor and safety gear linkage test and detection system includes an overspeed governor located at the top of the elevator shaft, a tensioning device located at the bottom of the elevator shaft, and a car disposed in the elevator shaft and connected to the guide rails in the elevator shaft. A safety gear connected to the guide rails is further provided at the bottom of the car.

[0011] The overspeed governor and the tensioning device are connected in a closed loop by a wire rope, and the safety gear is disposed on the wire rope.

[0012] A slack section is provided on the wire rope, and a tension sensor is provided at a position corresponding to the slack section. The fixed end and the detection end of the tension sensor are respectively fixed at both ends of the slack section so that the tension sensor and the remaining part of the wire rope except the slack section are in the same tension state, and the connection line between the fixed end and the detection end of the tension sensor is in the vertical direction.

[0013] The beneficial effects of the present invention are as follows:

[0014] For an elevator overspeed governor and safety gear linkage test and detection method and system provided by the present invention, since the pulling force in the case of wire rope slippage is the maximum pulling force of the overspeed governor, by measuring and collecting the pulling force of the wire rope and determining whether the collected pulling force of the wire rope is within a preset threshold range, comparing the measured pulling force of the wire rope with the preset threshold can quickly determine the working state of the overspeed governor and safety gear, and find out the main reasons for the failure of the safety gear to act in the overspeed governor and safety gear linkage test. This enables the inspector to make a more evidence-based judgment on the site and can prevent huge risks caused by changes in the force conditions of components such as the overspeed governor and safety gear. Description of the Drawings

[0015] Figure 1 It is a step flow chart of an elevator overspeed governor and safety gear linkage test and detection method of the present invention;

[0016] Figure 2 It is a structural schematic diagram of an elevator overspeed governor and safety gear linkage test and detection system of the present invention;

[0017] Figure 3 It is a structural schematic diagram of an elevator overspeed governor and safety gear linkage test and detection system of the present invention;

[0018] Figure 4 It is a structural schematic diagram of an elevator overspeed governor and safety gear linkage test and detection system of the present invention;

[0019] Label Description:

[0020] 1. Overspeed governor; 11. Wire rope; 111. Slack section;

[0021] 2. Tensioning device;

[0022] 3. Car;

[0023] 4. Safety gear; 41. Safety gear body; 42. First operating lever; 43. First lever; 44. Second lever; 45. Link; 46. Second operating lever;

[0024] 5. Tension sensor. Specific implementation manner

[0025] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following is described in conjunction with the implementation manners and accompanied by the drawings.

[0026] Please refer to Figure 1 , and a method for testing the linkage of an elevator speed limiter and safety gear is provided, including the following steps:

[0027] S1: Perform the linkage test of the elevator speed limiter and safety gear. If the safety gear fails to act, collect the pulling force of the steel wire rope placed on the elevator speed limiter and safety gear in the slipping state;

[0028] S2: Determine whether the collected pulling force of the steel wire rope is within the preset threshold range; if so, the test result is that the safety gear is abnormal; if not, the test result is that the speed limiter is abnormal.

[0029] As can be seen from the above description, the beneficial effects of the present invention are as follows: Since the pulling force of the steel wire rope in the slipping state is the maximum pulling force of the speed limiter, by measuring and collecting the pulling force of the steel wire rope and determining whether the collected pulling force of the steel wire rope is within the preset threshold range, comparing the measured pulling force of the steel wire rope with the preset threshold can quickly judge the working state of the speed limiter and safety gear, and find out the main reasons for the failure of the safety gear to act in the linkage test of the speed limiter and safety gear. It enables the inspector to make a more evidence-based judgment on the site and can prevent huge risks caused by changes in the force conditions of components such as the speed limiter and safety gear.

[0030] Furthermore, in step S1, collect the pulling forces of the steel wire ropes placed on the elevator speed limiter and safety gear under different working conditions, and use the maximum collected pulling force as the pulling force of the steel wire rope in step S2.

[0031] As can be seen from the above description, by collecting the pulling force of the steel wire rope placed on the elevator overspeed governor and the safety gear under the working conditions, and comparing the pulling forces of the steel wire rope under different working conditions, the maximum pulling force obtained is used as the maximum pulling force of the overspeed governor. Then, the maximum pulling force of the overspeed governor is compared with the preset threshold range. If the maximum pulling force of the overspeed governor is still not within the preset threshold range, it can be directly judged that the reason for the failure of the safety gear to act in the overspeed governor-safety gear interlock test lies in the abnormality of the overspeed governor.

[0032] Further, step S2 further includes: if it is concluded that the detection result is that the safety gear is abnormal, adjust the safety gear and then repeat the elevator overspeed governor-safety gear interlock test until the safety gear operates normally.

[0033] As can be seen from the above description, if it is concluded that the detection result is that the safety gear is abnormal, it is necessary to check and correct the abnormal condition of the safety gear. When the safety gear is abnormal, check whether the connecting rods, diagonal tie rods, components of the safety gear jaws and the connections between the components are abnormal. After repairing and correcting the abnormality of the safety gear, repeat the elevator overspeed governor-safety gear interlock test to check whether the safety gear operates effectively. If not, repair the safety gear again and repeat the elevator overspeed governor-safety gear interlock test until the safety gear operates normally.

[0034] Further, step S2 further includes: if it is concluded that the detection result is that the overspeed governor is abnormal, adjust the overspeed governor so that the pulling force of the steel wire rope is within the preset threshold range.

[0035] As can be seen from the above description, if it is concluded that the detection result is that the overspeed governor is abnormal, it means that the overspeed governor may have problems such as oil stain on the steel wire rope, rope groove wear, abnormal surface smoothness of the pressing block, etc., which cause the change of the pulling force of the overspeed governor. After checking and repairing the above problems one by one, re-measure the pulling force of the steel wire rope and make the pulling force of the steel wire rope within the preset threshold range.

[0036] Further, the execution of the elevator overspeed governor-safety gear interlock test is specifically as follows:

[0037] During the process of controlling the car to move at the inspection speed, short-circuit the electrical switch of the overspeed governor and then observe whether the safety gear acts.

[0038] As can be seen from the above description, in the overspeed governor-safety gear interlock test, obtain the maximum pulling force of the overspeed governor, execute the safety gear interlock test, make the steel wire rope of the overspeed governor slip, and during the process of driving the car to move downward, collect the pulling force of the steel wire rope placed on the elevator overspeed governor and the safety gear in the slipping state. At this time, the force of the steel wire rope in the slipping state measured is the maximum pulling force of the overspeed governor.

[0039] Refer to Figures 2 to 4, the present invention also provides an elevator overspeed governor and safety gear linkage test and detection system, including an overspeed governor located at the top of the elevator shaft, a tensioning device located at the bottom of the elevator shaft, and a car disposed in the elevator shaft and connected to the guide rails in the elevator shaft. A safety gear connected to the guide rails is further provided at the bottom of the car;

[0040] The overspeed governor and the tensioning device are connected in a closed loop by a steel wire rope, and the safety gear is disposed on the steel wire rope;

[0041] A slack section is provided on the steel wire rope, and a tension sensor is provided at a position corresponding to the slack section. The fixed end and the detection end of the tension sensor are respectively fixed at both ends of the slack section so that the tension sensor and the remaining part of the steel wire rope except the slack section are in the same tension state, and the connection line between the fixed end and the detection end of the tension sensor is in the vertical direction.

[0042] As can be seen from the above description, the beneficial effect of the present invention is that by arranging the tension sensor on the slack section of the steel wire rope and fixing the fixed end and the detection end of the tension sensor at both ends of the slack section respectively, the tension sensor can be connected to the steel wire rope as a whole, so that the tension sensor and the remaining part of the steel wire rope except the slack section are in the same tension state. Therefore, a force application point in the vertical direction can be provided for the tension sensor on the steel wire rope. After the detection end of the sensor is set at this force application point, the force measured by the tension sensor is the lifting force of the steel wire rope. The lifting force of the steel wire rope under different working conditions of the overspeed governor can be collected in real time through the tension sensor, so as to realize the quantitative analysis of the lifting force of the overspeed governor.

[0043] Further, the tension sensor is located above the car.

[0044] As can be seen from the above description, the tension sensor is located above the car, which is convenient for detecting the lifting force of the overspeed governor under the downward working condition during the overspeed governor and safety gear linkage test.

[0045] Further, a fixture is further included. One end of the fixture is a clamping end, the end of the fixture away from the clamping end is fixed on the top of the car, and the clamping end of the fixture is connected to the tension sensor.

[0046] As can be seen from the above description, the use of the fixture can flexibly adjust the connection between the tension sensor and the steel wire rope, so as to adjust the fixed position of the tension sensor under different working conditions.

[0047] Please refer to Figure 1 , Embodiment 1 of the present invention is:

[0048] At the initial stage of elevator production, type tests are carried out on the elevator to set and calibrate the pulling force of the speed governor and the maximum pulling force required for the safety gear to operate, so that the pulling force of the speed governor of the elevator meets the requirements of the "Safety Code for the Manufacture and Installation of Elevators" standard when leaving the factory. After the elevator is put into use, it is also necessary to regularly conduct the speed governor-safety gear interlock test on the elevator to verify the effectiveness of the speed governor and the safety gear in operation.

[0049] The present invention provides a method for detecting the speed governor-safety gear interlock test of an elevator, including the following steps:

[0050] S1: Perform the speed governor-safety gear interlock test of the elevator. If the safety gear fails to operate, collect the pulling force of the wire rope placed on the elevator speed governor and the safety gear in the slipping state.

[0051] S2: Determine whether the pulling force of the collected wire rope is within the preset threshold range; if so, the test result is that the safety gear is abnormal; if not, the test result is that the speed governor is abnormal.

[0052] Perform the speed governor-safety gear interlock test of the elevator. If the wire rope of the speed governor does not slip and the safety gear can reliably operate to stop the elevator urgently on the guide rail, providing effective protection for the safe operation of the elevator, it indicates that the speed governor-safety gear interlock test is successful, indicating that the speed governor and the safety gear of the elevator are both in an effective state at this time.

[0053] Perform the speed governor-safety gear interlock test of the elevator. If the safety gear fails to operate, that is, the safety gear fails to stop the elevator urgently on the guide rail, it indicates that the speed governor-safety gear interlock test is not successful. If the speed governor-safety gear interlock test is not successful, it is necessary to further determine the specific reason for the failure, specifically whether the pulling force of the speed governor is insufficient or the safety gear is improperly adjusted.

[0054] The specific operation of collecting the pulling force of the wire rope placed on the elevator speed governor and the safety gear in the slipping state in step S1 is as follows:

[0055] First, make the wire rope on the speed governor slip so that the wire rope can enter the slipping state during operation. The slipping treatment can be carried out before the elevator starts by adjusting the wire rope on the speed governor from the tensioned state to the slack state, so that the wire ropes configured on the speed governor and the safety gear can be in the slipping state during the operation of the elevator. The specific operation of collecting the pulling force of the wire rope in the slipping state is as follows: Configure a tension sensor on the wire rope. When performing the speed governor-safety gear interlock test of the elevator, run the elevator, and the tension sensor can obtain the pulling force of the wire rope from the static state to the slipping state, and the pulling force of the wire rope in the slipping state is the maximum pulling force of the speed governor wire rope.

[0056] When performing step S2, compare the pulling force of the wire rope obtained in step S1 under the slipping state with the preset threshold range. If the pulling force of the wire rope under the slipping state is within the preset threshold range, it is concluded that the safety gear is abnormal; if the pulling force of the wire rope under the slipping state is not within the preset threshold range, it is concluded that the speed limiter is abnormal. Specifically, the preset threshold refers to the maximum pulling force recorded in the type test report of the speed limiter wire rope, and the preset threshold range is the maximum pulling force range of the speed limiter wire rope in the type test report. And the maximum pulling force recorded in the type test report of the speed limiter wire rope meets the maximum pulling force required for the reliable operation of the safety gear.

[0057] In this embodiment, step S1 further includes: collecting the pulling forces of the wire ropes placed on the elevator speed limiter and the safety gear under different working conditions, and taking the maximum collected pulling force as the pulling force of the wire rope in step S2.

[0058] Specifically, perform the elevator speed limiter and safety gear interlock test. First, set the elevator to the maintenance state. When the elevator is descending, stop the car at the second highest floor and then start the elevator. At this time, the car descends at the maintenance speed, and the car drives the wire rope to move. After short-circuiting the electrical switch of the speed limiter, since the wire rope has been treated for slipping, the wire rope enters the slipping state from the static state during the movement process. The pulling force of the wire rope during the movement process from the static state to the slipping state can be collected in real time through the tension sensor. On the contrary, when the elevator is ascending, stop the car at the second lowest floor and then start the elevator, and continue to execute and collect the pulling force of the wire rope of the speed limiter during the movement process from the static state to the slipping state under the ascending working condition of the elevator according to the above method.

[0059] Preferably, configure a display device to display the pulling force of the wire rope during the movement process from the static state to the slipping state in the form of a waveform diagram in real time in the display device, and also display the preset threshold range (that is, the maximum pulling force range of the speed limiter wire rope in the type test report) in the display device, so as to facilitate the real-time comparison of the pulling forces of the wire ropes placed on the elevator speed limiter and the safety gear under different working conditions with the preset threshold range. Further, preferably, the display device is a handheld display device, and the inspector can make a judgment on site through the handheld display device. The handheld display device can directly obtain the magnitude of the pulling force of the wire rope under different working conditions, as well as the comparison between the pulling force of the wire rope under different working conditions and the threshold range.

[0060] In this embodiment, step S2 further includes: if it is obtained that the safety gear is abnormal in the detection result, the safety gear is adjusted and the elevator overspeed governor-safety gear interlock test is repeatedly performed until the safety gear operates normally. When the detection result is that the safety gear is abnormal, it is necessary to check and correct the abnormal condition of the safety gear. When the safety gear is abnormal, check whether the components of the safety gear connecting rod, diagonal tie rod, and safety gear jaw and the connections between the components are abnormal. After repairing and correcting the abnormality of the safety gear, the elevator overspeed governor-safety gear interlock test is performed again to check whether the safety gear operates effectively. If not, repair the safety gear again and repeatedly perform the elevator overspeed governor-safety gear interlock test until the safety gear operates normally.

[0061] In this embodiment, step S2 further includes: if it is obtained that the overspeed governor is abnormal in the detection result, the overspeed governor is adjusted to make the pulling force of the wire rope within the preset threshold range. When the detection result is that the overspeed governor is abnormal, it means that there may be problems such as oil stain on the wire rope, rope groove wear, and abnormal surface brightness of the pressing block in the overspeed governor, which may cause the pulling force of the overspeed governor to change. After troubleshooting and repairing the above problems one by one, measure the pulling force of the wire rope again and make the pulling force of the wire rope within the preset threshold range.

[0062] In this embodiment, the implementation of the elevator overspeed governor-safety gear interlock test is specifically as follows: First, set the elevator to the maintenance state. When the elevator is descending, stop the car at the second highest floor and then start the elevator. During the process of controlling the car to move downward at the maintenance speed, short-circuit the electrical switch of the overspeed governor and observe whether the safety gear operates. When the elevator is ascending, reset the safety gear, stop the car at the second lowest floor and then start the elevator. During the process of controlling the car to move upward at the maintenance speed, cut off the power supply of the electrical switch of the overspeed governor, restore the electrical switch of the safety gear on the car top, supply power, and the elevator returns to normal.

[0063] In this embodiment, the use of the elevator overspeed governor-safety gear interlock test detection method of the present invention specifically further includes the following:

[0064] Step 1: Obtain the maximum pulling force required for the safety gear to achieve reliable operation in the type test; specifically: conduct the type test on the elevator. After the mechanical action of the overspeed governor during the type test, the wire rope generates a pulling force to lift the safety gear, and the safety gear operates reliably, and the elevator traction wire rope slips. At this time, the maximum tension on the overspeed governor wire rope measured is the maximum pulling force required for the safety gear to achieve reliable operation. And the tension of the wire rope of the overspeed governor is not less than twice the force required for the reliable operation of the safety gear or 300 N (take the larger value of the two values).

[0065] Step 2: Obtain the maximum pulling force of the speed governor during the speed governor and safety gear interlock test. Specifically: Conduct the safety gear interlock test, make the steel wire rope of the speed governor slip, and during the process of driving the car downward, collect the pulling force of the steel wire rope placed on the elevator speed governor and the safety gear in the slipping state. At this time, the force of the steel wire rope in the slipping state is the maximum pulling force of the speed governor steel wire rope.

[0066] Step 3: Compare whether the maximum pulling force of the speed governor steel wire rope obtained in Step 2 is within the preset threshold range. The preset threshold is the maximum pulling force required for the safety gear to achieve reliable operation obtained in Step 1, and the preset threshold range is the range of the maximum pulling force required for the safety gear to achieve reliable operation. Moreover, if the maximum pulling force of the speed governor is within the preset threshold range, it indicates that the maximum pulling force required for the safety gear to act has changed, and the relevant components of the safety gear should be readjusted; if the maximum pulling force of the speed governor is less than the preset threshold range, it indicates that the current speed governor is abnormal, and the relevant components of the speed governor should be readjusted.

[0067] Please refer to Figures 2 to 4 As shown, an elevator speed governor and safety gear interlock test detection system includes a speed governor 1 located at the top of the elevator shaft, a tensioning device 2 located at the bottom of the elevator shaft, and a car 3 provided in the elevator shaft and connected to the guide rails in the elevator shaft. The bottom of the car is also provided with a safety gear 4 connected to the guide rails; the speed governor includes a speed governor main body and a steel wire rope 11 provided on the speed governor. The tensioning device is a tensioning wheel.

[0068] The speed governor and the tensioning device are connected in a closed loop by a steel wire rope, and the safety gear is provided on the steel wire rope. Specifically, a slack section 111 is provided on the steel wire rope, and a tension sensor 5 is provided corresponding to the position of the slack section. The tension sensor is an S-type tension sensor. The fixed end of the tension sensor is fixed to the upper end of the slack section by a clamp, and the detection end of the tension sensor is fixed to the lower end of the slack section by a clamp, so that the tension sensor and the rest of the steel wire rope except the slack section are in the same tension state, and the connection line between the fixed end and the detection end of the tension sensor is in the vertical direction.

[0069] In this embodiment, the slack section on the steel wire rope is located above the top of the car, and the tension sensor is located above the top of the car.

[0070] In this embodiment, the clamp can be a wire rope clip, a U-shaped wire clip or an electromagnet. One end of the clamp is a clamping end, and the end of the clamp away from the clamping end is fixed to the structural beam at the top of the car.

[0071] In this embodiment, it further includes a handheld display device. A controller is provided inside the handheld display device. The controller includes a memory, a processor, and an electrical signal conversion module. A computer program that can run on the processor is stored in the memory. The tension sensor is electrically connected to the controller. The tension sensor converts the collected lifting force of the wire rope into an electrical signal and transmits it to the controller. When the processor is executed, it drives the electrical signal conversion module to convert the collected lifting force of the wire rope into a waveform diagram and display it on the screen of the handheld display device, and compares the collected lifting force of the wire rope with a preset threshold range. The preset threshold range is the maximum lifting force range of the governor wire rope in the type test report stored in the memory.

[0072] In this embodiment, the tension pulley is an adjustable movable pulley. The tightness of the wire rope can be adjusted by adjusting the position of the tension pulley. When performing the slipping treatment on the wire rope, the distance between the tension pulley and the governor can be adjusted to a smaller value, so as to adjust the wire rope from a tensioned state to a relaxed state.

[0073] In this embodiment, the safety gear is composed of a safety gear operating mechanism and a safety gear body 41. The safety gear operating mechanism includes a first operating lever 42, a first lever 43, a second lever 44, and a connecting rod 45 and a second operating lever 46 that are sequentially hinged. The lower ends of the first operating lever and the second operating lever are respectively connected to the safety gear bodies on both sides of the bottom of the car. The upper end of the first operating lever is hinged to one end of the first lever. The upper end of the second operating lever is hinged to one end of the second lever. The other ends of the first lever and the second lever are respectively hinged to both ends of the connecting rod. The governor wire rope is respectively connected to the safety gear operating mechanism. When the governor operates, the governor wire rope pulls the first lever and the second lever, and simultaneously pulls up the first operating lever and the second operating lever through the connecting rod, so that the safety gear bodies on both sides act simultaneously to achieve the purpose of stopping the car.

[0074] In this embodiment, the slack section of the wire rope can be made slack by raising the tension pulley, so that a section of the governor wire rope above the top of the car is slack, and the tension sensor is placed into the slack section of the wire rope. Specifically, the distance range between the slack section and the top of the car is 15 cm - 30 cm.

[0075] The methods of using the elevator governor-safety gear interlock test detection system of the present invention are as follows:

[0076] First, conduct a type test on the elevator. After the mechanical action of the governor during the type test, the wire rope generates a lifting force to lift the safety gear, the safety gear acts reliably, and the elevator traction wire rope slips. At this time, the maximum tension on the governor wire rope measured is the maximum lifting force required for the safety gear to act reliably.

[0077] Secondly, arrange the tension sensor on the slack section of the wire rope, start the speed limiter and make the wire rope of the speed limiter slip. When the wire rope of the speed limiter slips during the downward driving of the car, the force of the wire rope in the slipping state measured at this time is the maximum pulling force of the speed limiter.

[0078] Finally, when the wire rope of the speed limiter slips and the safety clamp is not lifted, the pulling force measured when the wire rope of the speed limiter is in the slipping state is the maximum pulling force of the speed limiter. Compare the pulling force measured when the wire rope of the speed limiter is in the slipping state with the preset threshold range. If this value is within the preset threshold range, it indicates that the maximum pulling force required for the safety clamp to act has changed, and the relevant components of the safety clamp should be readjusted. If this value is less than the preset threshold range, it indicates that the current speed limiter is abnormal, and the relevant components of the speed limiter should be readjusted.

[0079] In summary, a method and system for testing the linkage of an elevator speed limiter and safety clamp provided by the present invention uses a system for testing the linkage of the speed limiter and safety clamp to obtain the pulling force of the wire rope of the elevator speed limiter in the slipping state under actual working conditions as the maximum pulling force of the wire rope of the speed limiter, and uses the method for testing the linkage of the speed limiter and safety clamp to quantitatively analyze the obtained maximum pulling force of the wire rope of the speed limiter, compare whether the maximum pulling force of the wire rope of the speed limiter is within the maximum pulling force range in the type test report of the wire rope of the speed limiter, and provide data support to obtain the specific reasons for the failure of the safety clamp to act during the execution of the elevator speed limiter and safety clamp linkage test. At the same time, it is convenient for inspectors to have evidence to rely on during on-site judgment, realizing the prevention of huge risks caused by changes in the force conditions of components such as speed limiters and safety clamps, and providing convenience and support for inspection work.

[0080] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent transformations made using the content of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A method for testing the linkage of an elevator overspeed governor and safety gear, characterized in that, For an elevator overspeed governor and safety gear interlock test detection system, it includes an overspeed governor located at the top of the elevator shaft, a tensioning device located at the bottom of the elevator shaft, and a car disposed in the elevator shaft and connected to the guide rails in the elevator shaft. A safety gear connected to the guide rails is further provided at the bottom of the car; The overspeed governor and the tensioning device are connected in a closed loop by a steel wire rope, and the safety gear is disposed on the steel wire rope; A slack section is provided on the steel wire rope, and a tension sensor is provided corresponding to the position of the slack section. The fixed end and the detection end of the tension sensor are respectively fixed at both ends of the slack section so that the tension sensor and the remaining part of the steel wire rope except the slack section are in the same tension state, and the connection line between the fixed end and the detection end of the tension sensor is in the vertical direction; The method includes the following steps: S1: Perform the elevator overspeed governor and safety gear interlock test. If the safety gear fails to act, collect the pulling force of the steel wire rope placed on the elevator overspeed governor and the safety gear in the slipping state; S2: Judge whether the collected pulling force of the steel wire rope is within the preset threshold range; if so, the detection result is that the safety gear is abnormal; if not, the detection result is that the overspeed governor is abnormal.

2. The method for testing the interlock of an elevator overspeed governor and safety gear according to claim 1, wherein In step S1, collect the pulling forces of the steel wire rope placed on the elevator overspeed governor and the safety gear under different working conditions, and use the maximum collected pulling force as the pulling force of the steel wire rope in step S2.

3. The method for testing the linkage of an elevator speed limiter and safety gear according to claim 1, characterized in that, Step S2 further includes: if the detection result is that the safety gear is abnormal, adjust the safety gear and then repeat the elevator overspeed governor and safety gear interlock test until the safety gear acts normally.

4. The safety gear linkage test detection method for an elevator overspeed governor according to claim 1, wherein Step S2 further includes: if the detection result is that the overspeed governor is abnormal, adjust the overspeed governor so that the pulling force of the steel wire rope is within the preset threshold range.

5. A method for testing the linkage of an elevator overspeed governor and safety gear according to claim 1, characterized in that, Performing the elevator overspeed governor and safety gear interlock test specifically means: During the process of controlling the car to move at the inspection speed, short-circuit the electrical switch of the overspeed governor and then observe whether the safety gear acts.

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