CN209618638U - A kind of bypass frequency conversion escalator fault detection means - Google Patents
A kind of bypass frequency conversion escalator fault detection means Download PDFInfo
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Abstract
The utility model discloses a kind of bypass frequency conversion escalator fault detection means, the escalator includes bypass frequency conversion control cabinet, motor and failure protecting device, the bypass frequency conversion control cabinet is connect with failure protecting device, the detection device includes: anti-power loss driver, including work frequency circuit and frequency changer circuit, the work frequency circuit is prevented from detecting caused by the moment power loss of bypass frequency conversion control cabinet out-put supply in escalator start-up course for bypass frequency conversion device and be interrupted, the frequency changer circuit is for frequency conversion drive escalator simulation hypervelocity or non-operating reversed fault condition；Data collector is installed on escalator step or handrail, every detection data for escalator during acquisition testing；Operator works for controlling anti-power loss driver and data collector and receives display and detect related data；The anti-power loss driver and data collector are connect with operator, and the anti-power loss driver is connect with bypass frequency conversion control cabinet and motor respectively.
Description
Technical Field
The utility model relates to a bypass frequency conversion escalator fault detection device belongs to elevator fault detection technical field.
Background
Patent No. ZL201420850731.0 discloses a comprehensive detection system for an escalator as shown in fig. 1, the escalator includes a bypass frequency conversion control cabinet and a motor; the detection system comprises: the driver is connected in series between the bypass variable frequency control cabinet and the motor and is used for driving the escalator to simulate overspeed or reverse fault; the sensor is arranged on the escalator step or the handrail belt and is used for quantitatively detecting various speed signals; and the operator is connected with the driver and the sensor and can control the driver according to different detection items and collect and display the detected speed signal.
The working principle of the automatically switched bypass variable-frequency escalator is shown in fig. 2, when the escalator is normally started, a three-phase power supply is connected with a motor through a main switch, a frequency converter and a variable-frequency operation contactor KM1 (at the moment, the contactors KM2, KM3 and KM4 are all disconnected), and the escalator starts to operate; when the escalator is started up till the speed reaches the normal speed, the variable-frequency operation contactor KM1 is disconnected, then the power-frequency operation contactor KM2 and the operation direction contactor are attracted (the ascending contactor KM3 or the descending contactor KM4 are attracted, but the two contactors are not attracted at the same time), at the moment, the frequency converter is bypassed, and the escalator operates in a power-frequency mode. The bypass frequency conversion escalator has the advantages that: the frequency conversion is used during starting, so that the starting is stable and the impact is small; after the starting is finished, the automatic switching is carried out to the power frequency operation, the frequency converter is only used for starting, the requirement on the frequency converter is low, the cost can be reduced, and the reliability of the escalator is improved. However, in actual detection, if the existing detection system is used, only the frequency converter realizes the function of the driver, and a detection system operation fault occurs, because after the frequency conversion of the bypass frequency conversion escalator is started, and the bypass frequency conversion escalator is switched to power frequency operation, the power loop can be instantly powered off (after the KM1 is disconnected, the KM2 is pulled in, and the loop is instantly powered off), the driver (the frequency converter) can detect the power loss of the main loop and report a fault (which is the basic function of the frequency converter), the driver stops outputting, and the escalator cannot be driven to carry out overspeed and non-operation reversion states, so the escalator detection work cannot be completed. Therefore, the escalator comprehensive detection system disclosed in patent No. ZL201420850731.0 cannot be used for fault detection of an automatically switched bypass variable frequency escalator.
Escalator overspeed means that the speed of the escalator or moving walkway exceeds the normal operating speed.
Non-operation reversion means that the steps, the pedals or the adhesive tapes of the escalator or the moving sidewalk change the specified running direction under the non-manual operation state.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bypass frequency conversion automatic escalator fault detection device plays drive automatic escalator and exceeds speed limit or reverses in order to simulate staircase trouble operating mode in current automatic escalator comprehensive testing system to prevent that the condition of the drive arrangement wrong report trouble that power return circuit leads to in the twinkling of an eye loses the electricity and takes place, make the detection to automatic switch-over's bypass frequency conversion automatic escalator safe more accurate.
The technical scheme of the utility model be a bypass frequency conversion automatic escalator fault detection device for detect the automatic escalator trouble of bypass frequency conversion, automatic escalator includes bypass frequency conversion control cabinet, motor and fault protection device, bypass frequency conversion control cabinet is connected with fault protection device, and its characterized in that, this detection device includes:
the power frequency circuit is used for bypassing the frequency converter to prevent detection interruption caused by instant power loss of a bypass variable frequency control cabinet output power supply in the starting process of the escalator, and the frequency conversion circuit is used for driving the escalator in a frequency conversion mode to simulate overspeed or non-operation reversal fault working conditions;
the data acquisition device is arranged on the steps or the hand straps of the escalator and is used for acquiring various detection data of the escalator in the detection process;
the operator is used for controlling the anti-loss driver and the data acquisition unit to work and receiving and displaying detection related data;
the anti-loss electric driver and the data acquisition unit are connected with the operator, and the anti-loss electric driver is respectively connected with the bypass variable frequency control cabinet and the motor.
Furthermore, the loss-prevention driver comprises an input end three-phase junction box, an output end three-phase junction box, a driving frequency converter, a control end wiring box and at least three contactors; the input end three-phase junction box, the contactor KM5 and the output end three-phase junction box are sequentially connected to form a power frequency circuit; the input end three-phase junction box, the driving frequency converter, the interlocked contactor KM6, the contactor KM7 and the output end three-phase junction box are sequentially connected to form a frequency conversion circuit; wherein,
the input end three-phase junction box is connected with the three-phase output end of the bypass variable frequency control cabinet;
the output end three-phase junction box is connected with the three-phase input end of the motor;
the input end three-phase junction box is also connected with the output end three-phase junction box through a contactor KM 5;
the driving frequency converter is respectively connected with the input end three-phase junction box and the output end three-phase junction box and used for driving the escalator to overspeed or reverse to simulate the fault working condition of the escalator, wherein the driving frequency converter is connected with the output end three-phase junction box in a positive and negative phase sequence through a contactor KM6 and a contactor KM7, so that the positive rotation or the reverse rotation of the motor can be realized by selectively closing the contactors;
and the control terminal box is respectively connected with the driving frequency converter, the contactor KM5, the contactor KM6, the contactor KM7 and an operator of the detection device, and the operator can control the driving frequency converter to work and control the contactors to be closed or opened.
Further, prevent that electric drive that loses still includes power and loses electric monitoring relay, two input terminals of power and two arbitrary output terminals in the three output terminal of input three-phase terminal box of power loss electric monitoring relay are connected, the output and the control end junction box of power loss electric monitoring relay are connected, the operation ware accessible the power of power loss electric monitoring relay control automatic escalator bypass frequency conversion switch board loses the electric situation.
Further, prevent that electric drive that loses still includes three phase current source phase sequence monitoring relay, three input terminal of three phase current source phase sequence monitoring relay is connected with the three output terminal of input three-phase terminal box, three phase current source phase sequence monitoring relay's output and control end wiring box are connected, thereby the operation ware accessible three phase current source phase sequence monitoring relay monitors the phase sequence of the three phase current source of input three-phase terminal box output and judges that current escalator state is in going upward or down.
Preferably, each contactor is an ac contactor.
Further, the operator is a handheld operator which is provided with a trigger in a connected mode. The trigger can be used for manual operation in some special conditions, such as emergency braking, emergency stop and other related detection.
Further, the data collector comprises a speed measuring sensor used for measuring the running speed of the steps and/or the hand strap of the escalator.
Furthermore, the loss-prevention driver is connected with the operator through a control line, and an input interface and an output interface of the loss-prevention driver are both aviation connectors.
Further, the speed measuring sensor comprises a rubber wheel and a rotary encoder which are coaxially connected, and the rubber wheel and the rotary encoder are arranged at proper positions of a skirtboard of a horizontal section of the escalator or a glass wall of the horizontal section through a support.
Further, the support includes sucking disc and swing arm, and it will through the sucking disc speed sensor adsorbs the installation, makes through adjustment swing arm speed sensor hugs closely automatic escalator horizontal segment step or handrail area.
The utility model has the advantages that:
the utility model discloses technical scheme's bypass frequency conversion automatic escalator fault detection device, the automatic escalator comprehensive testing system's that the patent is disclosed to patent number ZL201420850731.0 driver has improved, makes its bypass frequency conversion automatic escalator that can be applicable to the automatic switch-over in the background art, avoids leading to detecting system to break down the detection because of the mistake electricity in the twinkling of an eye of bypass variable frequency control cabinet.
Drawings
Fig. 1 is a schematic diagram showing a comprehensive detection system framework of an escalator in the prior art;
fig. 2 is a schematic circuit diagram of an automatic switching bypass variable frequency escalator according to the present invention;
fig. 3 is a schematic diagram of a driver circuit of a prior art escalator comprehensive detection system;
fig. 4 is a schematic view of a detection device for fault detection of an automatically switched bypass variable frequency escalator according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an anti-loss drive circuit according to an embodiment of the present invention;
fig. 6 is a circuit connection relationship diagram of the loss-proof drive, the bypass variable frequency control cabinet and the motor when the bypass variable frequency escalator fault detection device according to the embodiment of the invention is in use;
fig. 7 is a circuit connection diagram of a control terminal box according to an embodiment of the present invention.
Detailed Description
The conception, specific structure and technical effects of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, so as to fully understand the objects, aspects and effects of the present invention.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items. The use of any and all examples, or exemplary language ("e.g.," such as, "etc.), provided herein is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
Referring to fig. 1-3, an escalator of automatic switching bypass frequency conversion is detected by using a prior art escalator comprehensive detection system, and the escalator comprises a bypass frequency conversion control cabinet and a motor; the prior art detection system comprises: the driver is connected in series between the bypass variable frequency control cabinet and the motor and is used for driving the escalator to simulate overspeed or reverse fault; the sensor is arranged on the escalator step or the handrail belt and is used for quantitatively detecting various speed signals; the operator is connected with the driver and the sensor and can control the driver according to different detection items and collect and display the detected speed signal; the principle of an internal circuit of an existing driver is shown in fig. 3, the driver is driven by a frequency converter independently, when the existing driver is used for detecting an automatically switched bypass frequency conversion escalator, because the escalator needs to be normally started, at the beginning, one of a contactor KM3 'and a contactor KM 4' needs to be closed (the contactor KM3 'and the contactor KM 4' are interlocked and cannot be closed simultaneously) so that a motor can be powered on to operate, therefore, from the beginning of starting, the frequency converter inside the driver is in a working state, when the bypass frequency conversion control cabinet is powered off instantly, the frequency converter inside the driver can also be stopped due to power failure, and detection cannot be continued. In order to prevent the emergence of such circumstances, the utility model discloses corresponding improvement has been carried out to current driver to the fungible current driver is used for automatic escalator comprehensive testing system's detection achievement.
Referring to fig. 4-7, a bypass variable frequency escalator fault detection device for detecting a bypass variable frequency escalator fault, the escalator including a bypass variable frequency control cabinet, a motor and a fault protection device, the bypass variable frequency control cabinet being connected to the fault protection device, the detection device comprising: the power frequency circuit is used for bypassing the frequency converter to prevent detection interruption caused by instant power loss of a bypass variable frequency control cabinet output power supply in the starting process of the escalator, and the frequency conversion circuit is used for driving the escalator in a frequency conversion mode to simulate overspeed or non-operation reversal fault working conditions; the data acquisition device is arranged on the steps or the hand straps of the escalator and is used for acquiring various detection data of the escalator in the detection process; the operator is used for controlling the anti-loss driver and the data acquisition unit to work and receiving and displaying detection related data; the anti-loss electric driver and the data acquisition unit are connected with the operator, and the anti-loss electric driver is respectively connected with the bypass variable frequency control cabinet and the motor.
The anti-loss driver comprises an input end three-phase junction box, an output end three-phase junction box, a driving frequency converter, a control end junction box, a power loss monitoring relay K1, a three-phase power phase sequence monitoring relay K2 and three alternating current contactors; the input end three-phase junction box, the contactor KM5 and the output end three-phase junction box are sequentially connected to form a power frequency circuit; the input end three-phase junction box, the driving frequency converter, the interlocked contactor KM6, the contactor KM7 and the output end three-phase junction box are sequentially connected to form a frequency conversion circuit; wherein,
specifically, the input end three-phase junction box is used for connecting the anti-lost drive with the escalator bypass variable frequency control cabinet, and outside the anti-lost drive, the terminals L1, L2 and L3 are respectively connected with a three-phase output line of the escalator bypass variable frequency control cabinet; in the loss-proof electric driver, terminals L1, L2 and L3 are respectively connected to input ends 1, 2 and 3 of a contactor KM5, meanwhile, terminals L1, L2 and L3 are respectively connected to an input end R, S, T of a frequency converter, meanwhile, terminals L1, L2 and L3 are respectively connected to a three-phase power supply phase sequence relay K2, and meanwhile, any two terminals of the terminals L1, L2 and L3 are respectively connected to an input end of a power supply loss monitoring relay K1.
The output end three-phase wiring box is used for connecting the anti-lost drive with the motor of the escalator, and outside the anti-lost drive, the terminals L1 ', L2 ' and L3 ' are respectively connected with three phase lines of the motor; in the loss-proof electric driver, terminals L1 ', L2 ' and L3 ' are respectively connected with output ends 4, 5 and 6 of a contactor KM5, terminals L1 ', L2 ' and L3 ' are respectively connected with output ends 4, 5 and 6 of KM6, and terminals L1 ', L2 ' and L3 ' are respectively connected with output ends 4, 5 and 6 of KM 7.
The control end wiring box is used for being connected with an operator of the detection system, the operator acquires the state information of the anti-lost electric driver through the control end wiring box and controls the operation of the anti-lost electric driver through the control end wiring box; in the loss-proof electric driver, the control end junction boxes are respectively connected with the control ports of the driving frequency converters and used for controlling the work of the driving frequency converters; meanwhile, the control terminal box is connected with an output contact of a power failure monitoring relay K1 and is used for monitoring whether a three-phase power supply input to the power failure prevention driver by the bypass variable frequency control cabinet loses power or not; meanwhile, the control terminal junction box is connected with an output contact of a three-phase power supply phase sequence monitoring relay K2 and is used for monitoring the phase sequence of a three-phase power supply input to a driver (if a positive phase sequence is defined as ascending of the escalator, a negative phase sequence is descending of the escalator or is defined in the reverse direction, so that whether the current state of the escalator is in ascending or descending can be judged through the positive and negative phase sequences; meanwhile, the control terminal junction box is connected with a coil of the contactor KM5 and is used for controlling the attraction or disconnection of the contactor KM 5; the coil of the contactor KM6 is connected and used for controlling the closing or opening of the contactor KM 6; and the control terminal box is connected with the coils of the contactor KM7 and used for controlling the pull-in or the pull-out of the contactor KM7, and the connection of the control terminal box and each circuit module can not be distinguished by phase sequence.
The driving frequency converter is used for variable frequency driving of the motor, changes the rotating speed and the running direction of the motor and simulates fault working conditions of accidental overspeed, non-operation reversion and the like of the escalator. The three-phase input end R, S, T of the driving frequency converter is respectively connected with the L1, the L2 and the L3 of the input end three-phase junction box, the three-phase output end U, V, W of the driving frequency converter is connected with the input ends 1, 2 and 3 of the contactor KM6, the three-phase output end U, V, W of the driving frequency converter is connected with the input ends 3, 2 and 1 (or 2, 1 and 3, or 1, 3 and 2) of the contactor KM7, and the control end of the driving frequency converter is connected with the operator through the control end junction box. (if 1, 2 and 3 are defined as positive phase sequence, then 2, 3, 1 and 2 are also positive phase sequence, and 3, 2, 1, 3 and 2 are all negative phase sequence.)
The power supply power loss monitoring relay K1 is used for monitoring whether a three-phase power supply input into the power loss prevention driver has a power loss condition, the input end of the power supply power loss monitoring relay K1 is respectively connected with any two terminals (such as L1 and L2, or L1 and L3, or L2 and L3) in an input end three-phase junction box, and the output contact of the power supply power loss monitoring relay K1 is connected with an operator through a control end junction box.
The three-phase power supply phase sequence monitoring relay K2 is used for monitoring the phase sequence of a three-phase power supply input into the anti-lost drive (judging whether the current escalator state is in an ascending state or a descending state), the input end of the three-phase power supply phase sequence monitoring relay K2 is respectively connected with the L1, the L2 and the L3 of the three-phase terminal box at the input end, and the output contact is connected with the operator through the terminal box at the control end.
The contactor KM6 and the contactor KM7 are a pair of interlocking reversing contactors for changing the phase sequence of a three-phase power supply output to the motor, input ends 1, 2 and 3 of the contactor KM6 are directly connected with a three-phase output end U, V, W of the driving frequency converter respectively, and output ends 4, 5 and 6 of the contactor KM6 are connected with L1 ', L2 ' and L3 ' of a three-phase junction box at the output end of the loss-proof driver respectively; the input ends 1, 2 and 3 of the contactor KM7 are directly connected with the three-phase output end W, V, U (or V, U, W or U, W, V) of the driving frequency converter respectively (if U, V, W is defined as positive phase sequence, V, W, U and V are also positive phase sequence, W, V, U and V are negative phase sequence), and the three-phase output ends 4, 5 and 6 of the contactor KM7 are directly connected with the L1 ', L2 ' and L3 ' of the three-phase junction box of the output end of the loss prevention driver respectively.
Before electrical operations such as dismantling, short-circuiting and connecting, a main power switch is disconnected firstly, and a multimeter is used for measuring to ensure that a non-electrified party can carry out corresponding electrical operations.
In the detection, in the starting stage of the escalator, a contactor KM5 in the loss-prevention driver is closed, a contactor KM6 and a contactor KM7 are both disconnected, at the moment, the loss-prevention driver operates in a power frequency mode, a driving frequency converter is bypassed, and the escalator is normally started to operate; when the escalator is started successfully and runs stably, the contactor KM5 is disconnected, and according to the current running direction of the escalator, the rotating speed and the running direction of the motor are controlled through the mutual cooperation of the interlocked contactor KM6, the contactor KM7 (only one of the contactor KM6 and the contactor KM7 is closed, and cannot be closed at the same time) and the driving frequency converter, so that the fault working conditions of overspeed or non-operation reversion and the like are simulated; at the moment of instant power failure in the process of starting the escalator by the bypass variable-frequency control cabinet, the driving frequency converter is in a non-working state and is switched to a driving frequency converter running mode after stable running, so that the driving frequency converter can still drive the escalator to simulate a fault working condition, and the situation that the driving frequency converter cannot continuously finish fault detection due to failure of power failure and failure of work stop can be avoided; the control of each circuit module of the driver in the detection is manually and/or automatically operated and controlled through an operator, when the driving frequency converter drives the escalator to simulate the fault working condition, the overspeed protection device or the reversion protection device of the escalator is started, all contactors of the bypass variable frequency control cabinet are disconnected, and therefore the input end three-phase junction box is powered off, and the power supply power loss monitoring relay K1 can detect that the bypass variable frequency control cabinet is powered off to judge that the overspeed protection device or the reversion protection device is started due to the fault of the escalator, and the fault protection device is normal.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, as long as it achieves the technical effects of the present invention by the same means, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention. The technical solution and/or the embodiments of the invention may be subject to various modifications and variations within the scope of the invention.
Claims (10)
1. The utility model provides a bypass frequency conversion escalator fault detection device for detect the escalator trouble of bypass frequency conversion, escalator includes bypass frequency conversion control cabinet, motor and fault protection device, bypass frequency conversion control cabinet is connected with fault protection device, its characterized in that, this detection device includes:
the power frequency circuit is used for bypassing the frequency converter to prevent detection interruption caused by instant power loss of a bypass variable frequency control cabinet output power supply in the starting process of the escalator, and the frequency conversion circuit is used for driving the escalator in a frequency conversion mode to simulate overspeed or non-operation reversal fault working conditions;
the data acquisition device is arranged on the steps or the hand straps of the escalator and is used for acquiring various detection data of the escalator in the detection process;
the operator is used for controlling the anti-loss driver and the data acquisition unit to work and receiving and displaying detection related data;
the anti-loss electric driver and the data acquisition unit are connected with the operator, and the anti-loss electric driver is respectively connected with the bypass variable frequency control cabinet and the motor.
2. The bypass variable frequency escalator fault detection device of claim 1, characterized in that: the loss-prevention driver comprises an input end three-phase junction box, an output end three-phase junction box, a driving frequency converter, a control end wiring box and at least three contactors; the input end three-phase junction box, the contactor KM5 and the output end three-phase junction box are sequentially connected to form a power frequency circuit; the input end three-phase junction box, the driving frequency converter, the interlocked contactor KM6, the contactor KM7 and the output end three-phase junction box are sequentially connected to form a frequency conversion circuit; wherein,
the input end three-phase junction box is connected with the three-phase output end of the bypass variable frequency control cabinet;
the output end three-phase junction box is connected with the three-phase input end of the motor;
the input end three-phase junction box is also connected with the output end three-phase junction box through a contactor KM 5;
the driving frequency converter is respectively connected with the input end three-phase junction box and the output end three-phase junction box and used for driving the escalator to overspeed or reverse to simulate the fault working condition of the escalator, wherein the driving frequency converter is connected with the output end three-phase junction box in a positive and negative phase sequence through a contactor KM6 and a contactor KM7, so that the positive rotation or the reverse rotation of the motor can be realized by selectively closing the contactors;
and the control terminal box is respectively connected with the driving frequency converter, the contactor KM5, the contactor KM6, the contactor KM7 and an operator of the detection device, and the operator can control the driving frequency converter to work and control the contactors to be closed or opened.
3. The bypass variable frequency escalator fault detection device of claim 2, characterized in that: the power loss prevention driver further comprises a power loss monitoring relay, two input terminals of the power loss monitoring relay are connected with any two output terminals of three output terminals of the input end three-phase junction box, the output end of the power loss monitoring relay is connected with the control end wiring box, and the operator can monitor the power loss condition of the escalator bypass variable frequency control cabinet through the power loss monitoring relay.
4. The bypass variable frequency escalator fault detection device of claim 2, characterized in that: the anti-lost electric driver further comprises a three-phase power supply phase sequence monitoring relay, three input terminals of the three-phase power supply phase sequence monitoring relay are connected with three output terminals of the input end three-phase junction box, an output end of the three-phase power supply phase sequence monitoring relay is connected with a control end junction box, and the operator can judge whether the current escalator state is in an ascending state or a descending state through the phase sequence of the three-phase power supply output by the three-phase power supply phase sequence monitoring relay.
5. The bypass variable frequency escalator fault detection device of claim 2, characterized in that: each contactor is an alternating current contactor.
6. The bypass variable frequency escalator fault detection device of claim 1, characterized in that: the manipulator is a handheld manipulator which is connected with a trigger.
7. The bypass variable frequency escalator fault detection device of claim 1, characterized in that: the data acquisition unit comprises a speed measurement sensor used for measuring the running speed of the steps and/or the hand straps of the escalator.
8. The bypass variable frequency escalator fault detection device of claim 1, characterized in that: the loss-preventing driver is connected with the operator through a control line, and an input interface and an output interface of the loss-preventing driver are both aviation connectors.
9. The bypass variable frequency escalator fault detection device of claim 7, characterized in that: the speed measuring sensor comprises a rubber wheel and a rotary encoder which are coaxially connected, and the rubber wheel and the rotary encoder are arranged at proper positions of a skirtboard of a horizontal section of the escalator or a glass wall of the horizontal section through a support.
10. The bypass variable frequency escalator fault detection device of claim 9, characterized in that: the support comprises a sucker and a swing arm, the speed measuring sensor is installed in an adsorption mode through the sucker, and the speed measuring sensor is made to be attached to the steps of the horizontal section of the escalator or the hand strap through adjustment of the swing arm.
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| CN201920125068.0U CN209618638U (en) | 2019-01-23 | 2019-01-23 | A kind of bypass frequency conversion escalator fault detection means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109850737A (en) * | 2019-01-23 | 2019-06-07 | 广东省特种设备检测研究院珠海检测院 | A kind of bypass frequency conversion escalator fault detection means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109850737A (en) * | 2019-01-23 | 2019-06-07 | 广东省特种设备检测研究院珠海检测院 | A kind of bypass frequency conversion escalator fault detection means |
| CN109850737B (en) * | 2019-01-23 | 2024-07-30 | 广东省特种设备检测研究院珠海检测院 | Bypass frequency conversion escalator fault detection device |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHUHAI ANYES TECHNOLOGY Co.,Ltd. Assignor: GUANGDONG INSPECTION AND Research Institute OF SPECIAL EQUIPMENT ZHUHAI INSPECTION INSTITUTE Contract record no.: X2021980017429 Denomination of utility model: A fault detection device for bypass frequency conversion escalator Granted publication date: 20191112 License type: Common License Record date: 20220111 |