A single-rail crane speed measurement trolley and its reliability detection method

Abstract

The present invention provides a single-rail hoist speed measurement trolley and a reliability detection method thereof. By arranging an adjustable-length adjusting device on the speed measurement trolley, the adjusting device can make the speed measurement wheel of the speed measurement trolley in a suspended state or a state of being tightly attached to the track. When the speed measurement trolley is running normally, the adjusting device presses the speed measurement wheel against the track; when the speed measurement trolley needs to perform on-line reliability detection, the adjusting device extends to make the speed measurement wheel in a suspended state. After the speed measurement wheel is in the suspended state, the connection plug is inserted into the jack on the end plate of the centrifugal device, so as to realize the rotation of the speed measurement wheel. By setting different detection speeds, it is judged whether the centrifugal speed measurement component is reliable. The reliability detection method of the single-rail hoist speed measurement trolley can control the overspeed protection speed of the speed measurement trolley within an appropriate range, so as not to cause the locomotive to brake at a very low speed, nor to prevent the locomotive from braking when it is overspeed, thus ensuring the safety of the locomotive operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of single-track crane speed measurement, and specifically relates to a single-track crane speed measurement trolley with a reliability detection device and a reliability detection method thereof. Background Art

[0002] A single-track crane is a system that uses a special I-beam hung in the air above a roadway as a track, connects hanging vehicles with various functions into a vehicle group, and is towed by a traction device to run along the track. To ensure the safety of the single-track crane during operation, an overspeed protection device must be installed on the locomotive. By setting the maximum speed allowed for the locomotive through the overspeed protection device, when the speed exceeds this value, the braking system is automatically triggered to perform an emergency brake.

[0003] Whether the performance of the overspeed protection device of the locomotive is reliable is an important detection item before the locomotive runs. If the overspeed protection device fails or fails to brake when overspeed occurs, this will bring great potential safety hazards to the locomotive operation.

[0004] The existing single-track crane speed measurement trolley includes a frame and a centrifugal speed measurement component arranged on the frame. The centrifugal speed measurement component includes a speed measurement wheel running on the track, a centrifugal device connected to the speed measurement wheel, and a mounting seat for mounting the speed measurement wheel and the centrifugal device. The first ear of the mounting seat is hinged to the frame, and the centrifugal device includes a trigger rod and an adjusting spring mounted on the trigger rod.

[0005] After the single-track crane speed measurement trolley is installed on the track, it is usually necessary to remove the entire speed measurement trolley to perform reliability detection on the speed measurement trolley, making it difficult to perform reliability detection on the speed measurement trolley online, and consuming a large amount of manpower and material resources. Summary of the Invention

[0006] The present invention provides a single-track crane speed measurement trolley and a reliability detection method thereof, which solve the problem that the existing speed measurement trolley cannot be detected on the track.

[0007] To achieve the above object, the technical solution adopted by the present invention is: a single-track crane speed measurement trolley, which includes a frame and a centrifugal speed measurement component arranged on the frame. The centrifugal speed measurement component includes a speed measurement wheel running on the track, a centrifugal device connected to the speed measurement wheel, and a mounting seat for mounting the speed measurement wheel and the centrifugal device. The first ear of the mounting seat is hinged to the frame, and the centrifugal device includes a trigger rod and an adjusting spring mounted on the trigger rod; the speed measurement trolley further includes a detection device, and the detection device includes an adjusting device and a driving component;

[0008] The adjusting device is used to connect the second ear on the mounting seat and the mounting shaft fixed on the frame, and the adjusting device is used to drive the mounting seat to rotate around the hinge axis at the first ear, so that the speed measurement wheel is pressed against or separated from the track;

[0009] The driving assembly includes a bracket, a connecting plug, and a driving motor. The connecting plug is fixedly connected to the output shaft of the driving motor. The driving motor is mounted on the bracket, and the bracket is fixed to the vehicle frame. The connecting plug is used to be inserted into a jack provided on the end plate of the centrifugal device to drive the speed measuring wheel to rotate synchronously;

[0010] The bracket includes two legs and a cross beam connecting the tops of the two legs. A limit seat is provided in the middle of the cross beam. The connecting plug extends into the bottom hole of the limit seat and cooperates with the jack. The housing part of the driving motor is restricted from rotating by the limit seat;

[0011] A limit groove is provided in the limit seat, and a limit clamping plate matching the limit groove is correspondingly provided at the connecting part of the driving motor and the limit seat; alternatively, a limit clamping plate is provided in the limit seat, and a limit groove matching the limit clamping plate is correspondingly provided at the connecting part of the driving motor and the limit seat.

[0012] In a possible embodiment, the adjusting device includes a tension spring and a length adjusting assembly fixed to one end of the tension spring. The length adjusting assembly includes a sleeve, a screw rod, and a threaded sleeve. The threaded sleeve is fixed to one end of the tension spring. The threaded end of the screw rod cooperates with the threaded sleeve. The rod head of the screw rod is rotatably arranged in the sleeve. A hook connected to the second ear is provided on the sleeve. A twist block for twisting the screw rod is fixed in the middle of the screw rod; alternatively, the length adjusting assembly is arranged as a hydraulic cylinder or a pneumatic cylinder. One end of the length adjusting assembly is fixed to one end of the tension spring, and the other end is connected to the second ear of the mounting seat.

[0013] In a possible embodiment, the driving motor is arranged as an electric motor, and the electric motor is connected with a frequency converter for adjusting the rotational speed of the electric motor.

[0014] In a possible embodiment, the driving motor is arranged as a hydraulic motor, and the hydraulic motor is connected with a flow regulating valve for adjusting the rotational speed of the hydraulic motor.

[0015] The present invention also provides a reliability detection method for a monorail hoist speed measuring trolley, including the following steps:

[0016] Drive the speed measuring wheel away from the track through the adjusting device;

[0017] Mount the driving motor on the bracket, and insert the connecting plug on the driving motor into the jack provided on the end plate of the centrifugal device;

[0018] Control the driving motor to rotate to a set speed, where the set speed includes a first speed, a second speed, and a third speed. Among them, the first speed is any speed less than the second speed; the second speed is the minimum speed at which the speed measuring wheel triggers braking; the third speed is the maximum speed at which the speed measuring wheel triggers braking;

[0019] Step ①: Adjust the speed of the driving motor to the first speed, and determine whether the trigger rod on the centrifugal device is thrown out; if it is thrown out, increase the elastic force of the adjusting spring on the centrifugal device and re-detect according to step ①; otherwise, proceed to the following step ②;

[0020] Step ②: Adjust the speed of the driving motor to the second speed, and determine whether the trigger rod on the centrifugal device is thrown out; if it is thrown out, increase the elastic force of the adjusting spring on the centrifugal device and re-detect according to step ②; otherwise, proceed to the following step ③;

[0021] Step ③: Adjust the speed of the driving motor to the third speed, and determine whether the trigger rod on the centrifugal device is thrown out; if it is thrown out, the requirement is met, otherwise, reduce the elastic force of the adjusting spring on the centrifugal device and re-detect according to step ③;

[0022] In a possible embodiment, the first speed in the above detection method is set to 1 / 2 of the third speed.

[0023] The monorail hoist speed measuring trolley provided by the present invention is provided with an adjusting device with an adjustable length on the speed measuring trolley. This adjusting device can make the speed measuring wheel of the speed measuring trolley in a suspended state or a state of being close to the track. When the speed measuring trolley is running normally, this adjusting device is equivalent to a connecting spring and presses the speed measuring wheel against the track; when the speed measuring trolley needs to perform on-line reliability detection, the adjusting device extends to make the speed measuring wheel in a suspended state. After the speed measuring wheel is in a suspended state, then insert the connecting plug into the jack on the end plate of the centrifugal device, so as to realize the rotation of the speed measuring wheel. By setting different detection speeds, it is judged whether the centrifugal speed measuring component is reliable.

[0024] The reliability detection method of the monorail hoist speed measuring trolley provided by the present invention can control the overspeed protection speed of the speed measuring trolley within an appropriate range, which will not cause the locomotive to brake at a very low speed, nor will it cause the locomotive not to trigger braking when it is overspeed, thus ensuring the safety of the locomotive operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front view structural schematic diagram of the monorail hoist speed measuring trolley provided by an embodiment of the present invention.

[0026] Figure 2 is the three-dimensional structural schematic diagram of the monorail hoist speed measuring trolley provided by an embodiment of the present invention.

[0027] Figure 3 is Figure 2 Another perspective three - dimensional structure schematic diagram of the monorail speed - measuring trolley provided in

[0028] Figure 4 is Figure 1 the top - view of

[0029] Figure 5 The three - dimensional structure schematic diagram of a possible adjusting device of the present invention.

[0030] Figure 6 The exploded view of a possible driving component structure of the present invention.

[0031] Figure 7 The three - dimensional structure schematic diagram of the centrifugal speed - measuring component provided in an embodiment of the present invention.

[0032] Figure 8 The three - dimensional structure schematic diagram of the centrifugal speed - measuring component with the end - cover removed provided in an embodiment of the present invention. Detailed implementation manners

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description of this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0034] Refer to Figures 1-4 , this embodiment provides a monorail speed - measuring trolley. The speed - measuring trolley includes a frame 9, a space for the track to pass through is formed in the middle of the frame 9, a centrifugal speed - measuring component 1 is installed on one side of the frame 9, and an encoder 8 is arranged on the other side. The centrifugal speed - measuring component 1 includes a centrifugal device 12, a mounting seat 11, a speed - measuring wheel 13, a lever 3 and a control valve 2; Guide wheels 4 that contact both sides of the lower wing of the track are respectively arranged on both sides of the frame, and load - bearing wheels 5 that are arranged at the position of the track web and run on the lower wing are also provided.

[0035] The speed - measuring principle of the speed - measuring trolley running on the track is as follows: The speed - measuring wheels 13 arranged on the centrifugal speed - measuring component 1 and the speed - measuring wheels 13 arranged on the encoder 8 respectively run along the track. The rotational speeds of the two speed - measuring wheels 13 are respectively transmitted to the corresponding centrifugal device 12 and encoder 8 through the connecting shaft. The centrifugal device 12 and the encoder 8 rotate together with the speed - measuring wheel 13. When the rotational speed of the speed - measuring wheel 13 reaches the set value, the centrifugal device 12 and the encoder 8 respond respectively.

[0036] Refer to Figure 8, wherein a movable block is provided in the centrifugal device 12, and the movable block can throw out the trigger rod 123 connected thereto by centrifugal force when the centrifugal device 12 rotates, and an adjusting spring 122 is connected to the trigger rod 123, and the adjusting spring 122 can adjust the throwing force of the trigger rod 123. When the locomotive running speed exceeds the set maximum speed, the trigger rod 123 is automatically thrown out and collides with the lever 3, and the lever 3 originally resists the switch of the control valve 2. When the trigger rod 123 collides with the lever 3, the lever 3 is separated from the switch of the control valve 2, thereby triggering the control valve 2 to operate, and the control valve 2 controls the pressure relief brake of the brake cylinder of the monorail crane.

[0037] The encoder 8 is a sensor that converts the mechanical geometric displacement on the output shaft into pulses or digital quantities through photoelectric conversion, and can obtain a relatively accurate speed value through conversion. By comparing the measured speed value with the preset maximum speed of the locomotive, if the speed exceeds the limit, the brake cylinder is controlled to release the pressure through an electrical signal.

[0038] The speed measuring trolley realizes overspeed protection through the cooperation of mechanical response and electronic control response. The main problem of the speed measuring form of encoder 8 is that the encoder 8 does not work due to loose joints or aging circuits. This can be solved through daily inspection and maintenance. The main problem of the centrifugal speed measuring assembly 1 is the failure or failure of the adjustment spring 122 on the trigger rod 123. If the trigger rod 123 is thrown out at a too low speed, it will affect the operation of the locomotive; if the trigger rod 123 cannot be thrown out when the locomotive is running at an overspeed, it will cause a greater safety hazard. In addition, since the speed measuring trolley is installed on the track, it is difficult to perform online detection of the centrifugal speed measuring assembly 1. It is usually necessary to disassemble the centrifugal speed measuring assembly 1 or disassemble the speed measuring trolley as a whole for detection.

[0039] refer to Figure 1 In this embodiment, a detection device is added to the existing speed measuring vehicle to realize the online detection of the reliability of the speed measuring vehicle. The detection device includes an adjustment device 7 and a drive assembly 6.

[0040] refer to Figure 1 , wherein the adjusting device 7 is an elastic connector connecting the second ear of the mounting seat 11 and the mounting shaft on the frame 9, and the first ear of the mounting seat 11 is hinged on the frame 9. The speed measuring wheel 13 is connected to the centrifugal device 12 through the connecting shaft, and the mounting seat 11 is sleeved on the connecting shaft, and the mounting seat 11 and the connecting shaft are in clearance fit. The mounting seat 11 can drive the speed measuring wheel 13 and the centrifugal device 12 to rotate around the hinge shaft of the first ear on the frame 9, and the speed measuring wheel 13 can be pressed against the track through the adjusting device 7. When the centrifugal speed measuring assembly 1 is to be tested online, the speed measuring wheel 13 can be disengaged from the track by extending the adjusting device 7, that is, the speed measuring wheel 13 is suspended, thereby meeting the reliability test requirements of the centrifugal speed measuring assembly 1 when the locomotive is parked.

[0041] Reference Figure 5 , optionally, the adjusting device 7 includes a tension spring 71 and a length adjusting component 72 fixed to one end of the tension spring 71. The length adjusting component 72 includes a sleeve 724, a screw 723 and a threaded sleeve 721. The threaded sleeve 721 is fixed to one end of the tension spring 71. The threaded end of the screw 723 cooperates with the threaded sleeve 721. The rod head of the screw 723 is rotatably arranged in the sleeve 724. A hook for connecting with the second ear of the mounting seat 11 is arranged on the sleeve 724. A torsion block 722 for twisting the screw 723 is fixed in the middle of the screw 723.

[0042] During specific use, by rotating the torsion block 722, the screw 723 moves inside the threaded sleeve 721, thereby changing the length of the length adjusting component 72, and then realizing that the speed measuring wheel 13 disengages from the track, so as to facilitate on-line detection.

[0043] In another possible implementation, the length adjusting component 72 is set as a hydraulic cylinder or a pneumatic cylinder. One end of the length adjusting component 72 is fixed to one end of the tension spring 71, and the other end is connected to the second ear of the mounting seat 11. The elongation of the length adjusting component 72 is automatically realized through the hydraulic cylinder or the pneumatic cylinder.

[0044] Reference Figure 2 、 Figure 6 and Figure 7 , the driving component 6 includes a bracket 62, a connecting plug 611 and a driving motor 61. The connecting plug 611 is fixedly connected to the output shaft of the driving motor 61. The driving motor 61 is installed on the bracket 62. The bracket 62 is fixed on the vehicle frame 9. The connecting plug 611 is used to be inserted into the jack 1211 arranged on the end plate 121 of the centrifugal device 12 to drive the speed measuring wheel 13 to rotate synchronously.

[0045] Reference Figure 6 , in some possible implementation manners, the end shape of the connecting plug 611 matches the shape of the jack 1211. Optionally, the connecting plug 611 can be directly welded to the output shaft of the driving motor 61, or can be fixed to the output shaft by other means, such as through a coupling.

[0046] Continue to refer Figure 6 , wherein, the bracket 62 includes two feet and a cross beam connecting the tops of the two feet. A limit seat 621 is arranged in the middle of the cross beam. The connecting plug 611 extends into the bottom hole of the limit seat 621 and cooperates with the jack on the end plate 121. The housing part of the driving motor 61 is restricted from rotating by the limit seat 621.

[0047] Optionally, a limit groove is arranged in the limit seat 621, and a limit clamping plate matching the limit groove is correspondingly arranged on the connecting part of the driving motor and the limit seat.

[0048] In some other possible embodiments, a limit clamping plate is disposed in the limit seat 621 , and a limit groove matching the limit clamping plate is correspondingly disposed at the connection portion between the driving motor and the limit seat 621 .

[0049] That is, by manually limiting the driving motor 61 in the limit seat 621, the output shaft of the driving motor 61 is rotated by starting the switch, thereby driving the speed measuring wheel 13 to rotate synchronously. Of course, in other possible implementations, the driving motor 61 can also be connected to a cylinder or a hydraulic cylinder or other pushing mechanism, and the connecting plug 611 installed on the driving motor 61 is inserted into the jack through the pushing mechanism, wherein the pushing mechanism is fixed on the bracket 62.

[0050] In some possible embodiments, the drive motor 61 can be configured as an electric motor, and the electric motor 61 is connected to a frequency converter, which is used to adjust the speed of the electric motor. Figure 6 A possible embodiment of an electric motor is provided in FIG.

[0051] In some other possible embodiments, the driving motor 61 is configured as a hydraulic motor, and the hydraulic motor is connected to a flow regulating valve, and the flow regulating valve is used to adjust the rotation speed of the hydraulic motor.

[0052] In some other possible embodiments, the driving motor 61 is configured as a pneumatic motor, and the pneumatic motor is connected to a flow control valve, and the flow control valve is used to adjust the rotation speed of the hydraulic motor.

[0053] In this embodiment, by setting an adjustable length adjustment device on the speed measuring trolley, the adjustment device can make the speed measuring wheel 13 of the speed measuring trolley in a suspended state or a state close to the track. When the speed measuring trolley is operating normally, the adjustment device is equivalent to a connecting spring, pressing the speed measuring wheel 13 against the track; when the speed measuring trolley needs to perform online reliability detection, the adjustment device 7 is extended to make the speed measuring wheel 13 in a suspended state. When the speed measuring wheel 13 is in the suspended state, the connecting plug is inserted into the socket 1211 of the end plate 121 of the centrifugal device, so as to realize the rotation of the speed measuring wheel 13, and by setting different detection speeds, it is judged whether the centrifugal speed measuring assembly 1 is reliable.

[0054] This embodiment also provides a reliability detection method for a monorail hanging speed measuring trolley, comprising the following steps:

[0055] Step S100: The speed measuring wheel 13 is driven off the track by the upper adjustment device 7 .

[0056] That is, the mounting seat 11 is rotated around the hinge axis position through the extension adjustment device 7 so that the speed measuring wheel 13 is separated from the track. At this time, the speed measuring wheel 13 is in a suspended state.

[0057] Step S200: Install the drive motor 61 on the bracket 62, and insert the connection plug 611 on the drive motor 61 into the jack 1211 provided on the end plate of the centrifugal device 12.

[0058] The installation of the drive motor 61 on the bracket 62 mentioned here means that when not detecting, the drive motor 61 can be removed. When detecting, the drive motor can be connected to an external power source or a hydraulic source, and the drive motor 61 can be manually inserted into the limit seat 621 so that the connection plug 611 cooperates with the jack 1211.

[0059] Step S300: Control the drive motor 61 to rotate to a set speed. The set speed includes a first speed, a second speed, and a third speed. Among them, the first speed is any speed less than the second speed; the second speed is the minimum speed at which the speed measuring wheel triggers braking; the third speed is the maximum speed at which the speed measuring wheel triggers braking.

[0060] The function of the first speed here is to set an initial measurement speed to determine whether the spring of the speed measuring trolley has been loosened significantly. The second speed here is the minimum speed to ensure the safe operation of the locomotive, which can be the maximum speed of the locomotive itself. The third speed is the maximum speed to ensure the safe operation of the locomotive and is the maximum value of the allowable overspeed of the locomotive in the coal mine safety regulations.

[0061] In this embodiment, by setting the control speed of the speed measuring trolley between the second speed and the third speed, the safe operation of the locomotive is ensured all the time. The specific steps are as follows:

[0062] Step ①: Adjust the speed of the drive motor 61 to the first speed, and determine whether the trigger rod 123 on the centrifugal device 12 is thrown out; if thrown out, increase the elastic force of the adjusting spring on the centrifugal device 12 and re-detect according to step ①; otherwise, proceed to the following step ②.

[0063] This step ① determines whether the speed measuring trolley can be thrown out even at a very low speed. The first speed can be set to 1 / 2 of the third speed.

[0064] Step ②: Adjust the speed of the drive motor 61 to the second speed, and determine whether the trigger rod 123 on the centrifugal device 12 is thrown out; if thrown out, increase the elastic force of the adjusting spring 122 on the centrifugal device 12 and re-detect according to step ②; otherwise, proceed to the following step ③.

[0065] This step ② controls that the trigger rod 123 cannot be thrown out when the speed measuring trolley exceeds the second speed.

[0066] Step ③: Adjust the rotational speed of the drive motor 61 to the third rotational speed, and determine whether the trigger rod 123 on the centrifugal device 12 is thrown out; if it is thrown out, the requirement is met, otherwise, reduce the elastic force of the adjusting spring 122 on the centrifugal device 12, and re-detect according to Step ③.

[0067] This Step ③ is to control the trigger rod 123 of the speed measurement trolley to be thrown out within the range of less than the third rotational speed.

[0068] Through the above detection steps, the overspeed protection speed of the speed measurement trolley can be controlled within an appropriate range, which will not cause the locomotive to brake at a very low speed, nor will it cause the locomotive not to brake when it is overspeed, thus ensuring the safety of the locomotive operation.

[0069] It should be noted that in this article, the terms "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0070] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation manner of the present invention. It should be pointed out that due to the limited nature of written expression and objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A single-rail hoist speed measurement trolley, which comprises a frame and a centrifugal speed measurement assembly arranged on the frame. The centrifugal speed measurement assembly includes a speed measurement wheel running on the track, a centrifugal device connected to the speed measurement wheel, and a mounting seat for mounting the speed measurement wheel and the centrifugal device. The first ear of the mounting seat is hinged to the frame. The centrifugal device includes a trigger rod and an adjusting spring mounted on the trigger rod. It is characterized in that: The speed measurement trolley further includes a detection device, which includes an adjustment device and a drive assembly. The adjustment device is used to connect the second ear on the mounting seat and the mounting shaft fixed on the vehicle frame. The adjustment device is used to drive the mounting seat to rotate around the hinge axis at the first ear, so that the speed measurement wheel is in close contact with or separated from the track; The drive assembly includes a bracket, a connection plug, and a drive motor. The connection plug is fixedly connected to the output shaft of the drive motor. The drive motor is mounted on the bracket, and the bracket is fixed on the vehicle frame. The connection plug is used to be inserted into a jack provided on the end plate of the centrifugal device to drive the speed measurement wheel to rotate synchronously; The bracket includes two feet and a cross beam connecting the tops of the two feet. A limit seat is provided in the middle of the cross beam. The connection plug extends into the bottom hole of the limit seat and cooperates with the jack. The housing part of the drive motor is restricted from rotating by the limit seat; A limit groove is provided in the limit seat, and a limit card board matching the limit groove is correspondingly provided on the connection part of the drive motor and the limit seat; or, a limit card board is provided in the limit seat, and a limit groove matching the limit card board is correspondingly provided on the connection part of the drive motor and the limit seat.

2. The monorail hoist speed measurement trolley according to claim 1, characterized in that, The adjustment device includes a tension spring and a length adjustment assembly fixed at one end of the tension spring; the length adjustment assembly includes a sleeve, a screw rod, and a threaded sleeve. The threaded sleeve is fixed at one end of the tension spring. The threaded end of the screw rod cooperates with the threaded sleeve. The rod head of the screw rod is rotatably arranged in the sleeve. A hook for connecting with the second ear is provided on the sleeve. A twist block for twisting the screw rod is fixed in the middle of the screw rod; or, The length adjustment assembly is arranged as a hydraulic cylinder or a pneumatic cylinder. One end of the length adjustment assembly is fixed to one end of the tension spring, and the other end is connected to the second ear of the mounting seat.

3. The monorail hoist speed measurement trolley according to any one of claims 1-2, characterized in that, The drive motor is arranged as an electric motor, and the electric motor is connected with a frequency converter, and the frequency converter is used to adjust the rotation speed of the electric motor.

4. The monorail crane speed measurement trolley according to any one of claims 1-2, characterized in that, The drive motor is arranged as a pneumatic motor, and the pneumatic motor is connected with a flow regulating valve, and the flow regulating valve is used to adjust the rotation speed of the pneumatic motor.

5. The monorail crane speed measurement trolley according to any one of claims 1-2, characterized in that, The drive motor is arranged as a hydraulic motor, and the hydraulic motor is connected with a flow regulating valve, and the flow regulating valve is used to adjust the rotation speed of the hydraulic motor.

6. The reliability detection method of a single-rail hoist speed measurement trolley according to claim 1, characterized in that, It includes the following steps: driving the speed measurement wheel to separate from the track through the adjustment device; Install the drive motor on the bracket, and insert the connection plug on the drive motor into the jack provided on the end plate of the centrifugal device; Control the drive motor to rotate to a set speed, and the set speed includes a first speed, a second speed, and a third speed. Among them, the first speed is any speed less than the second speed; the second speed is the minimum speed at which the speed measurement wheel triggers braking; the third speed is the maximum speed at which the speed measurement wheel triggers braking; Step ①: Adjust the rotation speed of the drive motor to the first speed, and judge whether the trigger rod on the centrifugal device is thrown out; If it is thrown out, increase the elastic force of the adjusting spring on the centrifugal device and re-detect according to step ①; otherwise, run according to the following step ②; Step ②: Adjust the rotational speed of the drive motor to the second rotational speed and determine whether the trigger rod on the centrifugal device is thrown out; if it is thrown out, increase the elastic force of the adjusting spring on the centrifugal device and re-detect according to step ②; otherwise, run according to the following step ③; Step ③: Adjust the rotational speed of the drive motor to the third rotational speed and determine whether the trigger rod on the centrifugal device is thrown out; if it is thrown out, the requirements are met; otherwise, reduce the elastic force of the adjusting spring on the centrifugal device and re-detect according to step ③.

7. The reliability detection method of a monorail hoist speed measurement trolley according to claim 6, characterized in that The first rotational speed is set to 1 / 2 of the third rotational speed.

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