WO2019119430A1

WO2019119430A1 - Action state detection apparatus and detection method for elevator brake

Info

Publication number: WO2019119430A1
Application number: PCT/CN2017/118045
Authority: WO
Inventors: 黄东凌; 詹炜; 邢健; 刘东洋
Original assignee: 深圳市特种设备安全检验研究院
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2019-06-27

Abstract

An action state detection apparatus and detection method for an elevator brake. An elevator brake comprises a pressure sensor (10) for detecting the value of a pressure between a braking shoe (8) and a braking wheel (14), or a pressure sensor (10) for detecting the value of a pressure between an adjusting bolt (5) and an iron core (4), so as to realize the real-time direct monitoring of an action state of the brake, such that the defects of an existing monitoring apparatus, such as having wearing processing of the braking shoe (8), a braking clearance that is too small and not easy to adjust, elevator operation vibration processing, a fixation mode unable to be embedded, the fixation being unreliable, and the mounting and adjustment being affected by human factors, etc. are overcome. The existing problem of asynchronization that may occur between the monitoring element used and an actual braking state is effectively avoided, the problem of false positives or failures of the monitoring apparatus used is solved, and the safety of the elevator is improved.

Description

Elevator brake action state detecting device and detecting method

Technical field

The present invention relates to the field of elevator braking, and more particularly to an elevator brake operating state detecting device and a detecting method.

Background technique

As a mature vertical transportation tool, the elevator has been widely used in high-rise buildings in modern society. It is generally believed that the biggest risk of using an elevator is runaway (specifically, falling, ascending speed, shearing damage, etc.). In response to such risks, the elevator's response design is a normal stop system and an emergency protection system. At present, the system of the normal stop system generally adopts the type of elevator brake. In the emergency, the safety protection system has the types of elevator brake, speed limiter - safety clamp and rope clamp.

The brake is the final actuator of many safety protection devices of the elevator and is one of the most important components of the elevator. The braking and restless state of the elevator emergency are directly dependent on the brake. In recent years, the relevant management departments have increased the manufacturing standards of elevators to increase their safety performance. However, the two new safety components, the uplink overspeed protection device and the car accidental movement protection device, are still mostly designed to use elevator brakes. As its stop actuator. Once the brake stop system as the stop actuator and/or the brake safety system in the emergency fails, the elevator user will have a great risk, which is also the root cause of the accidental movement caused by the accident.

Elevator standard requirements, the brake mechanical parts of each elevator should be installed in two or more groups, in order to prevent one of the mechanical components from failing, the remaining mechanical components can also slow down the car at the rated speed full load down. . In fact, the simultaneous failure of multiple sets of independent elevator brake mechanical components is almost impossible to occur, and its failure is a development process. In this development process, due to the wear of the brake components, the entry of dirt, temperature changes, etc., it is usually the case that one of the mechanical components first intermittently jams, and the jamming causes it to not open or close. Failure to open the brakes will cause the brake components of the group to be dragged and operated, resulting in final failure due to wear; failure to close the brake will cause only the remaining mechanical parts to work, leaving serious safety hazards. If the above situation is not discovered in time, it will develop into a situation in which multiple sets of independent mechanical components of the elevator brake are ineffective, and eventually accidents such as car topping, bottoming, and shearing occur.

In order to reduce the risk of accidents caused by the failure of the above-mentioned brake mechanical components, the elevator often sets one or more sets of monitoring devices to monitor the brake action state. For example, the monitoring switch set in Figure 1. It can be seen that monitoring the operating state of the elevator brake is the key to ensuring the safe operation of the elevator. There are two main monitoring methods: one is to monitor a certain distance in the brake trajectory; the other is to monitor the change of the brake coil current. However, the two monitoring methods can not achieve direct monitoring of the brake action state, which has inherent defects, and its application status is as follows:

In the first method, a micro switch or an inductive proximity switch is used to monitor a certain distance in the trajectory of the brake. The effectiveness and accuracy of the monitoring are based on the initial state of the trajectory associated with the trajectory of the segment. on. When the initial state changes (such as main engine vibration, brake brake brake wear, component deformation displacement, etc.), the monitoring device will have a false alarm, and the false alarm has two problems: First, the actual operating state of the brake cannot be accurately detected. (If the brake is not fully braked, but the micro switch still outputs a normal switching signal), the risk of an accident increases; the second is an increase in the failure rate (such as a switch that the brake is normally open but the microswitch outputs a fault).

According to incomplete statistics, most of the elevators currently in use use micro-switches. This type of monitoring device has been removed or short-circuited by the elevator maintenance unit due to unreliable work and many faults.

The second method has high requirements for the design and manufacture of the monitoring device. At present, it has not been widely promoted. It is foreseeable that the power supply environment and power quality of the elevator use site will have a greater impact on the accuracy of the monitoring.

Both of these methods have inherent defects: one is to indirectly monitor the operating state of the brake; the other is that defects causing false alarms and high failure rates are inevitable.

technical problem

The technical problem to be solved by the present invention is to provide an elevator brake operating state detecting device and a detecting method for the above-mentioned defects that cannot directly monitor the operating state of the elevator brake.

Technical solution

The technical solution adopted by the present invention to solve the technical problem thereof is: constructing an elevator brake action state detecting device, the elevator brake includes a brake shoe and a brake wheel, and further comprising detecting the brake shoe and the brake wheel a pressure sensor between the pressure values;

The pressure sensor is electrically coupled to the elevator control circuit and transmits the pressure value to the elevator control circuit, the elevator control circuit controlling elevator operation based on the pressure value.

Preferably, the elevator brake operating state detecting device of the present invention further includes a brake arm and a brake shoe, and the brake shoe is fixed to the brake arm by the brake shoe;

The pressure sensor is disposed in the brake arm, or the pressure sensor is disposed in the brake shoe, or the pressure sensor is disposed between the brake shoe and the brake arm.

Preferably, the elevator brake operating state detecting device of the present invention is provided with a groove for placing the pressure sensor;

The elevator brake further includes a pin passing through the recess, and a pin sleeve disposed at a periphery of the pin, the pressure sensor being in close contact with the pin sleeve.

Preferably, in the elevator brake operating state detecting device of the present invention, the pressure sensor is fixed to the brake arm by a locking screw.

Preferably, the elevator brake operating state detecting device according to the present invention, the elevator control circuit includes a pressure processing circuit and an elevator mainboard circuit, the pressure sensor is electrically connected to the pressure processing circuit, and the pressure processing circuit is electrically connected to the Elevator mainboard circuit;

The pressure processing circuit determines whether the pressure value detected by the pressure sensor reaches a preset value, and transmits the determination result to the elevator mainboard circuit.

Preferably, the elevator brake action state detecting device of the present invention is provided with two elevator brakes in the elevator, each of the elevator brakes is provided with one of the pressure sensors, and the two pressure sensors are connected to the pressure. Processing circuit

The pressure processing circuit determines whether the pressure values detected by the two pressure sensors reach a preset value, and transmits the determination result to the elevator mainboard circuit.

Preferably, in the elevator brake operating state detecting device of the present invention, the pressure processing circuit includes a first switch, a second switch, a third switch, and a fourth switch, and the pressure processing circuit passes the first switch and the first a second switch is connected to the closing monitoring point of the elevator mainboard circuit; the pressure processing circuit is connected to the first opening monitoring point of the elevator mainboard circuit through the third switch; the pressure processing circuit passes the fourth switch a second opening monitoring point connecting the elevator mainboard circuit;

Before the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors are higher than the first preset value, and the first switch and the second switch are turned on, and the elevator mainboard circuit monitors the combination The brake monitoring point is normal and the elevator is started; otherwise the elevator is locked;

After the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors are lower than a second preset value, and the third switch and the fourth switch are turned on, and the elevator mainboard circuit monitors the When the open brake monitoring point and the second open brake monitoring point are normal, the elevator runs normally; otherwise the elevator fault is locked.

Preferably, the elevator brake operating state detecting device of the present invention further includes a brake arm and a brake shoe, the brake shoe is fixed on the brake shoe seat, and the brake shoe seat passes a pin is mounted on the brake arm;

One end of the brake arm is provided with an adjusting screw corresponding to an iron core in a driving device, and the pressure sensor is disposed between the adjusting screw and the iron core for detecting the adjusting screw and The pressure value between the iron cores.

Preferably, the elevator brake operating state detecting device of the present invention is characterized in that the elevator control circuit comprises a pressure processing circuit and an elevator mainboard circuit, and the pressure sensor is electrically connected to the pressure processing circuit, the pressure processing circuit Electrically connecting the elevator mainboard circuit;

Two elevator brakes are disposed in the elevator, and each of the elevator brakes is provided with one of the pressure sensors, and the two pressure sensors are connected to the pressure processing circuit;

The pressure processing circuit includes a first switch, a second switch, a third switch, and a fourth switch, and the pressure processing circuit is connected to the opening monitoring point of the elevator mainboard circuit through the first switch and the second switch; The pressure processing circuit is connected to the first closing monitoring point of the elevator mainboard circuit through the third switch; the pressure processing circuit is connected to the second closing monitoring point of the elevator mainboard circuit through the fourth switch;

Before the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors are lower than the first preset value, and the third switch and the fourth switch are turned on, and the elevator mainboard circuit monitors the The closing monitoring point and the second closing monitoring point are normal, and the elevator is started; otherwise the elevator is locked;

After the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors are higher than a second preset value, and the first switch and the second switch are turned on, and the elevator mainboard circuit monitors the opening. The brake monitoring point is normal and the elevator is running normally; otherwise the elevator is locked.

In addition, the present invention also provides an elevator brake operating state detecting method, the elevator brake includes a brake shoe, a brake wheel, and a pressure sensor for detecting a pressure value between the brake shoe and the brake wheel, The methods include:

S1, the pressure sensor detects a pressure value between the brake shoe and the brake wheel;

S2: Determine whether the pressure value reaches a preset value, and control the elevator operation according to the judgment result.

Preferably, the elevator brake operation state detecting method according to the present invention, the step S2 includes:

S21: Before the elevator starts, determining whether the pressure value is higher than a first preset value, and if yes, the elevator starts, if otherwise, the elevator is locked;

S22. After the elevator is started, determine whether the pressure value is lower than a second preset value. If yes, the elevator runs normally, and if otherwise, the elevator fault is locked.

Preferably, in the elevator brake action state detecting method of the present invention, two elevator brakes are disposed in the elevator, and each of the elevator brakes is provided with one of the pressure sensors, and the step S2 includes:

S23, before the elevator is started, determining whether the pressure values detected by the two pressure sensors are higher than the first preset value, if the elevator is started; if otherwise, the elevator is locked;

S24. After the elevator is started, determine whether the pressure values detected by the two pressure sensors are lower than a second preset value, and if so, the elevator operates normally; if otherwise, the elevator fault is locked.

Beneficial effect

An elevator brake action state detecting device and a detecting method embodying the present invention have the following beneficial effects: an elevator brake includes a brake shoe, a brake wheel, and a pressure value for detecting a brake shoe and a brake wheel. The pressure sensor electrically connects the elevator control circuit and transmits the pressure value to the elevator control circuit, and the elevator control circuit controls the elevator operation according to the pressure value. The invention realizes real-time direct monitoring of the brake action state, and the device can directly and reliably monitor the action state of the brake compared with the monitoring device in use, thereby overcoming the wear and treatment and braking of the original monitoring device in the brake shoe. The gap is too small to adjust, the elevator operation vibration treatment, the fixing method can not be embedded, the fixing is unreliable, the installation adjustment is susceptible to human factors, etc., effectively avoiding the existing in-use monitoring components and actual braking. The state may be out of synchronization, which solves the problem of false alarm or failure of the monitoring device in use, and improves the safety of the elevator.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of an elevator brake in the prior art;

2 is a schematic structural view of a first embodiment of an elevator brake operating state detecting device according to the present invention;

Figure 3 is an enlarged view of a region B of the first embodiment of the elevator brake operating state detecting device of the present invention;

Figure 4 is an enlarged cross-sectional view showing the A-A portion of the first embodiment of the elevator brake operating state detecting device of the present invention;

Figure 5 is a schematic structural view of an elevator control circuit according to a first embodiment of the present invention;

Figure 6 is a circuit diagram of an embodiment of an elevator control circuit in accordance with a first embodiment of the present invention;

Figure 7 is a schematic view showing the structure of the second and third embodiments of the elevator brake operating state detecting device of the present invention;

Figure 8 is an enlarged view of a C area of the second embodiment of the elevator brake operating state detecting device of the present invention;

Figure 9 is an enlarged view of a D area of a third embodiment of the elevator brake operating state detecting device of the present invention;

Figure 10 is a circuit diagram of an embodiment of an elevator control circuit in accordance with a third embodiment of the present invention;

Figure 11 is a flow chart showing the method for detecting the operating state of the elevator brake of the present invention;

Figure 12 is a flow chart showing the first embodiment of step S2 in the detecting method of the present invention;

Figure 13 is a flow chart showing the second embodiment of step S2 in the detecting method of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

First embodiment.

A first embodiment of the present invention will be described with reference to Figs. 2 to 4 . Specifically, the elevator brake comprises an end cover 1, a release wrench 2, a coil 3, a core 4, an adjusting screw 5, a pressing spring 6, a brake arm 7, a brake shoe 8, a brake shoe 9, a pressure sensor 10, The pin sleeve 11 , the pin 12 , and the locking screw 13 , wherein the braking object of the elevator brake is the brake wheel 14 , that is, the braking of the brake wheel 14 is achieved. The brake shoe 8 is fixed to the brake shoe 9 and the brake shoe 9 is fixed to the brake arm 7. Preferably, the shape of the brake shoe 8 matches the shape of the brake wheel 14, and the shapes of the brake shoe 9 and the brake arm 7 are matched to achieve a better braking effect. For example, the outer contour of the brake wheel 14 is circular, and the brake shoe 8 is curved so that the brake shoe 8 and the brake wheel 14 are closely fitted during braking. It can be understood that in the open state, there is a certain gap between the brake shoe 8 and the brake wheel 14, and the gap can be set according to the braking demand.

Further, one end of the brake arm 7 is movable and fixed, and the other end is connected to the driving device, and the driving device drives the brake arm 7 to move, and completes the opening and closing operations to achieve braking of the brake wheel 14. The driving device is realized by the end cover 1, the release wrench 2, the coil 3, the iron core 4, the adjusting screw 5, and the pressing spring 6. This embodiment does not improve this, and the prior art can be tested first.

Further, the pressure sensor 10 is used to detect the pressure value between the brake shoe 8 and the brake wheel 14. Alternatively, the pressure sensor 10 may be disposed within the brake arm 7, or the pressure sensor 10 may be disposed within the brake shoe 9, or the pressure sensor 10 may be disposed between the brake shoe 9 and the brake arm 7. It can be understood that the pressure sensor 10 of the present invention is used for the pressure between the brake shoe 8 and the brake wheel 14, and the braking torque is obtained according to the conversion relationship between the pressure value and the braking torque. Therefore, the position of the pressure sensor 10 can be based on The pressure value between the brake shoe 8 and the brake wheel 14 can be detected flexibly, and the pressure sensor provided according to the detection principle of the present invention belongs to the protection range of the present invention.

Alternatively, the brake arm 7 is provided with a recess for placing the pressure sensor 10. The elevator brake further includes a pin 12 passing through the groove, and a pin sleeve 11 disposed at the periphery of the pin 12, the pressure sensor 10 abutting the pin sleeve 11, and the direction of the pressure generated by the movement of the brake arm 7 is changed by the pin sleeve 11, so that the action The pressure direction of the pressure sensor 10 is perpendicular to the sensing side of the pressure sensor 10, and the pressure value is more accurately measured. Preferably, the pressure sensor 10 is fixed to the brake arm 7 by a locking screw 13. It will be appreciated that the pressure sensor 10 needs to be in good contact with the pin sleeve 11 or the pin 12 for better sensing of pressure.

Alternatively, the pressure sensor 10 may be disposed in a receiving cavity formed between the brake arm 7 and the brake shoe 9 , the elevator brake further including a pin 12 passing through the receiving cavity, and a pin sleeve 11 disposed at the periphery of the pin 12 The pressure sensor 10 is in close contact with the pin sleeve 11. The pressure sensor 10 is fixed to the brake arm 7 by a locking screw 13. It can be understood that the pressure sensor needs to have good contact with the pin sleeve 11 or the pin 12 in order to better sense the pressure.

In the control process, the pressure sensor 10 is electrically connected to the elevator control circuit, and transmits the pressure value to the elevator control circuit, and the elevator control circuit controls the elevator operation according to the pressure value. Before the elevator starts, the brake is in the closed state. If the pressure value detected by the pressure sensor 10 is higher than the first preset value (upper limit output), the elevator brake is normally closed, the elevator can be started; if the pressure sensor 10 detects If the pressure value is not higher than the first preset value, it means that the elevator brake is not properly closed. At this time, there is danger, and the elevator fault should be locked. After the elevator is started, the brake is in the open state. If the pressure value detected by the pressure sensor 10 is lower than the second preset value (lower limit output), it indicates that the elevator brake is normally open and can operate normally; if the pressure sensor 10 detects The pressure value is not lower than the second preset value, indicating that the elevator brake is not open normally. At this time, there is danger, and the elevator fault should be locked.

The elevator control circuit will be further described with reference to FIGS. 5 and 6. The elevator control circuit includes a pressure processing circuit and an elevator mainboard circuit, the pressure sensor 10 is electrically connected to the pressure processing circuit, and the pressure processing circuit is electrically connected to the elevator main circuit. The pressure processing circuit determines whether the pressure value detected by the pressure sensor 10 reaches a preset value, and transmits the determination result to the elevator mainboard circuit. Before the elevator starts, the brake is in the closing state, and the pressure processing circuit compares the pressure value collected by the pressure sensor 10 with the first preset value (the upper limit output) to determine whether the pressure value is higher than the first preset value (upper limit output). . If yes, it means that the elevator brake is closed normally, the elevator mainboard circuit controls the elevator to start; if not, it indicates that the elevator brake is closed abnormally. At this time, there is danger, and the elevator mainboard circuit will lock the elevator fault. After the elevator is started, the brake is in the open state, and the pressure processing circuit compares the pressure value collected by the pressure sensor 10 with the second preset value (lower limit output) to determine whether the pressure value is lower than the second preset value (lower limit output). If yes, it means that the elevator brake is normally open, and the elevator mainboard circuit controls the elevator to run normally; if not, it indicates that the elevator brake is not open normally, and there is danger at this time, and the elevator mainboard circuit will lock the elevator fault.

In the above embodiment, only the working principle of one elevator brake in the elevator is explained. In some embodiments, it is often required to provide two elevator brakes or two or more elevator brakes in the elevator. Now, two elevator brakes are taken as an embodiment for explanation. More than two elevator brakes can be implemented with reference to this embodiment.

Specifically, each elevator brake is correspondingly provided with a pressure sensor 10, and the two pressure sensors 10 are connected to the pressure processing circuit; the pressure processing circuit determines whether the pressure values detected by the two pressure sensors 10 reach a preset value, and transmits the determination result to the elevator. Motherboard circuit.

Referring to FIG. 6, the pressure processing circuit includes a first switch, a second switch, a third switch, and a fourth switch, and the pressure processing circuit is connected to the closing monitoring point of the elevator mainboard circuit through the first switch and the second switch. The pressure processing circuit is connected to the first opening monitoring point of the elevator mainboard circuit through the third switch; the pressure processing circuit is connected to the second opening monitoring point of the elevator mainboard circuit through the fourth switch. The first switch, the third switch, and the fourth switch are respectively connected to the main signal power supply common line. The second switch is connected to the closing monitoring point via the brake contactor auxiliary contact and/or the brake current limit contactor auxiliary contact.

Further, the control process is:

Before the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors 10 are higher than the first preset value (upper limit output). Preferably, the first preset values of the two pressure sensors 10 respectively correspond to the preset value A1. And the preset value A2. The pressure processing circuit determines whether the pressure value detected by the pressure sensor 10 is greater than a preset value A1 and a preset value A2. If the pressure values of the two pressure sensors 10 are respectively greater than their corresponding preset values A1 and A2, the first switch and the second switch are turned on, the elevator main circuit monitors the closing monitoring point, and the elevator mainboard circuit controls the elevator. Starting, it can be understood that the pressure values of the two sensors 10 are required to satisfy the condition at the same time. Otherwise the elevator is locked. It can be understood that the first preset values corresponding to the first switch and the second switch may be different, and the size may be set as needed.

After the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors 10 are lower than the second preset value (lower limit output). Preferably, the second preset values of the two pressure sensors 10 respectively correspond to the preset value A3. And the preset value A4. The pressure processing circuit determines whether the pressure value detected by the pressure sensor 10 is less than a preset value A3 and a preset value A4. If the pressure values of the two pressure sensors 10 are respectively less than their corresponding preset values A3 and preset values A4, the third switch and the fourth switch are turned on, and the elevator mainboard circuit monitors the first open monitoring point and the second open gate. The monitoring point is normal and the elevator is controlled to operate normally. It can be understood that the pressure values of the two sensors 10 are required to satisfy the condition at the same time. Otherwise the elevator is locked. It can be understood that the second preset values corresponding to the third switch and the fourth switch may be different, and the size may be set as needed.

Second embodiment

The second embodiment will be described with reference to Figs. 7 and 8. Specifically, the difference from the first embodiment is that the present embodiment further optimizes the mounting position of the pressure sensor 10. One side of the pin sleeve 11 is provided with a compression spring 17, and the compression spring 17 and the pressure sensor 10 are respectively disposed on opposite sides of the pin sleeve 11. The compression spring 17 is used for finely adjusting the pin sleeve to ensure good contact between the pin sleeve and the pressure sensor. Further, the top end of the compression spring 17 corresponds to the screw seat 18. Preferably, a process sleeve 16 is disposed around the compression spring 17.

Other structures and control principles of the present embodiment are the same as those of the first embodiment, and reference may be made to the first embodiment, and details are not described herein again.

Third embodiment

The third embodiment will be described with reference to Figs. 7 and 9. Specifically, the difference from the first embodiment and the second embodiment is that the first embodiment and the second embodiment are disposed between the brake arm 7 and the brake shoe 9 for detecting the brake The pressure between the shoe 8 and the brake wheel 14. The pressure sensor 10 of the present embodiment is disposed between the adjusting screw 5 and the iron core 4 for detecting the pressure value between the adjusting screw 5 and the iron core 4.

Specifically, the elevator brake further includes a brake arm 7 and a brake shoe 9 which is fixed to the brake shoe 9 and the brake shoe 9 is mounted on the brake arm 7 by the pin 12. One end of the brake arm 7 is provided with an adjusting screw 5 corresponding to the iron core 4 in the driving device, and the pressure sensor 10 is disposed between the adjusting screw 5 and the iron core 4 for detecting the adjusting screw 5 and the iron core 4 The value of the pressure between. When the elevator brake needs to be opened, the coil 4 works to drive the iron core 4 to move outward, thereby disengaging the brake arm 7, and the brake arm 7 is moved outward, and the brake shoe 8 and the brake wheel 14 are separated. When the elevator brake needs to be closed, the coil 4 works to drive the iron core 4 to move inward, and under the pressure of the compression spring 6, the brake arm 7 moves inward, and the brake shoe 8 and the brake wheel 14 are fitted together. .

Further, referring to FIG. 10, the elevator control circuit includes a pressure processing circuit and an elevator mainboard circuit, the pressure sensor 10 is electrically connected to the pressure processing circuit, and the pressure processing circuit is electrically connected to the elevator mainboard circuit;

Two elevator brakes are disposed in the elevator, and each elevator brake is provided with a pressure sensor 10, and the two pressure sensors 10 are connected to the pressure processing circuit; the pressure processing circuit includes a first switch, a second switch, a third switch, and a fourth switch. The pressure processing circuit is connected to the opening monitoring point of the elevator mainboard circuit through the first switch and the second switch; the pressure processing circuit is connected to the first closing monitoring point of the elevator mainboard circuit through the third switch; the pressure processing circuit is connected to the elevator main board through the fourth switch The second closing monitoring point of the circuit.

Before the elevator starts, the pressure processing circuit determines that the pressure value detected by the two pressure sensors 10 is lower than the first preset value, and then the third switch and the fourth switch are turned on, and the elevator main circuit monitors the first closing monitoring point and the second combination. The brake monitoring point is normal and the elevator is started; otherwise the elevator is locked. It can be understood that the first preset values corresponding to the third switch and the fourth switch may be different, and the size may be set as needed.

After the elevator is started, the pressure processing circuit determines that the pressure value detected by the two pressure sensors 10 is higher than the second preset value, then the first switch and the second switch are connected, the elevator main circuit circuit monitors that the opening monitoring point is normal, and the elevator runs normally; Otherwise the elevator is locked. The second preset value corresponding to the first switch and the second switch may be different, and the size may be set as needed.

Referring to FIG. 11, the elevator brake action state detecting method is applied to an elevator, and the elevator brake includes a brake shoe 8, a brake wheel 14, and a pressure for detecting a pressure value between the brake shoe 8 and the brake wheel 14. The sensor 10, or the pressure sensor 10 for detecting the pressure value between the adjusting screw 5 and the iron core 4; the structure of the elevator brake can be referred to the above embodiment, and details are not described herein again. Specifically, the detection method includes the following steps:

S1, the pressure sensor 10 detects the pressure value between the brake shoe 8 and the brake wheel 14, or the pressure sensor 10 detects the pressure value between the adjustment screw 5 and the iron core 4.

Specifically, the pressure sensor 10 is used to detect the pressure value between the brake shoe 8 and the brake wheel 14. Alternatively, the pressure sensor 10 may be disposed within the brake arm 7, or the pressure sensor 10 may be disposed within the brake shoe 9, or the pressure sensor 10 may be disposed between the brake shoe 9 and the brake arm 7. It can be understood that the pressure sensor 10 of the present invention is used for the pressure between the brake shoe 8 and the brake wheel 14, and the braking torque is obtained according to the conversion relationship between the pressure value and the braking torque. Therefore, the position of the pressure sensor 10 can be based on A flexible setting is required to detect the pressure value between the brake shoe 8 and the brake wheel 14.

Referring to FIG. 12, step S2 of the elevator brake action state detecting method includes:

S21: Before the elevator starts, determine whether the pressure value is higher than the first preset value, and if so, the elevator starts, if otherwise the elevator fault is locked.

Specifically, before the elevator is started, the brake is in a closed state. If the pressure value detected by the pressure sensor 10 is higher than the first preset value (upper limit output), the elevator brake is normally closed, and the elevator can be started. If the pressure value detected by the pressure sensor 10 is not higher than the first preset value, it indicates that the elevator brake is not properly closed, and there is a danger at this time, and the elevator fault should be locked.

S22. After the elevator is started, determine whether the pressure value is lower than the second preset value. If yes, the elevator runs normally, otherwise the elevator fault is locked.

Specifically, after the elevator is started, the brake is in an open state. If the pressure value detected by the pressure sensor 10 is lower than the second preset value (lower limit output), it indicates that the elevator brake is normally open and can operate normally. If the pressure value detected by the pressure sensor 10 is not lower than the second preset value, it indicates that the elevator brake is not normally opened, and there is a danger at this time, and the elevator fault should be locked.

In some embodiments, the elevator control circuit includes a pressure processing circuit and an elevator main circuit, the pressure sensor 10 is electrically coupled to the pressure processing circuit, and the pressure processing circuit is electrically coupled to the elevator main circuit. The pressure processing circuit determines whether the pressure value detected by the pressure sensor 10 reaches a preset value, and transmits the determination result to the elevator mainboard circuit. Before the elevator starts, the brake is in the closing state, and the pressure processing circuit compares the pressure value collected by the pressure sensor 10 with the first preset value (the upper limit output) to determine whether the pressure value is higher than the first preset value (upper limit output). . If yes, it means that the elevator brake is closed normally, the elevator mainboard circuit controls the elevator to start; if not, it indicates that the elevator brake is closed abnormally. At this time, there is danger, and the elevator mainboard circuit will lock the elevator fault. After the elevator is started, the brake is in the open state, and the pressure processing circuit compares the pressure value collected by the pressure sensor 10 with the second preset value (lower limit output) to determine whether the pressure value is lower than the second preset value (lower limit output). If yes, it means that the elevator brake is normally open, and the elevator mainboard circuit controls the elevator to run normally; if not, it indicates that the elevator brake is not open normally, and there is danger at this time, and the elevator mainboard circuit will lock the elevator fault.

Referring to FIG. 13, in the elevator brake action state detecting method, two elevator brakes are disposed in the elevator, and each of the elevator brakes is provided with a pressure sensor 10. The pressure processing circuit includes a first switch, a second switch, a third switch, and a fourth switch, and the pressure processing circuit is connected to the closing monitoring point of the elevator mainboard circuit through the first switch and the second switch. The pressure processing circuit is connected to the first opening monitoring point of the elevator mainboard circuit through the third switch; the pressure processing circuit is connected to the second opening monitoring point of the elevator mainboard circuit through the fourth switch. The first switch, the third switch, and the fourth switch are respectively connected to the main signal power supply common line. The second switch is connected to the closing monitoring point via the brake contactor auxiliary contact and/or the brake current limit contactor auxiliary contact.

Step S2 includes:

S23. Before starting the elevator, determine whether the pressure value detected by the two pressure sensors 10 is higher than the first preset value, if the elevator is started; otherwise, the elevator fault is locked.

Specifically, before the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors 10 are higher than the first preset value (upper limit output), and preferably, the first preset values of the two pressure sensors 10 respectively include Set the value A1 and the preset value A2. The pressure processing circuit determines whether the pressure value detected by the pressure sensor 10 is greater than a preset value A1 and a preset value A2. If the pressure values of the two pressure sensors 10 are respectively greater than their corresponding preset values A1 and A2, the first switch and the second switch are turned on, the elevator main circuit monitors the closing monitoring point, and the elevator mainboard circuit controls the elevator. Startup; it can be understood that the pressure values of the two sensors 10 are required to satisfy the condition at the same time. Otherwise the elevator is locked.

S24. After the elevator is started, it is determined whether the pressure value detected by the two pressure sensors 10 is lower than a second preset value, and if so, the elevator operates normally; otherwise, the elevator fault is locked.

Specifically, after the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors 10 are lower than the second preset value (lower limit output). Preferably, the second preset values of the two pressure sensors 10 respectively include Set the value A3 and the preset value A4. The pressure processing circuit determines whether the pressure value detected by the pressure sensor 10 is less than a preset value A3 and a preset value A4. If the pressure values of the two pressure sensors 10 are respectively less than their corresponding preset values A3 and preset values A4, the third switch and the fourth switch are turned on, and the elevator mainboard circuit monitors the first open monitoring point and the second open gate. The monitoring point is normal and the elevator is controlled to operate normally; it can be understood that the pressure values of the two sensors 10 are required to satisfy the condition at the same time. Otherwise the elevator is locked.

The invention realizes real-time direct monitoring of the brake action state, and the device can directly and reliably monitor the action state of the brake compared with the monitoring device in use, thereby overcoming the wear and treatment and braking of the original monitoring device in the brake shoe. The gap is too small to adjust, the elevator operation vibration treatment, the fixing method can not be embedded, the fixing is unreliable, the installation adjustment is susceptible to human factors, etc., effectively avoiding the existing in-use monitoring components and actual braking. The state may be out of synchronization, which solves the problem of false alarm or failure of the monitoring device in use, and improves the safety of the elevator.

The above embodiments are merely illustrative of the technical concept and the features of the present invention. The purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention without limiting the scope of the present invention. Equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the appended claims.

Claims

An elevator brake action state detecting device, the elevator brake comprising a brake shoe (8) and a brake wheel (14), characterized in that it further comprises detecting the brake shoe (8) and the brake wheel ( 14) a pressure sensor between the pressure values (10);

The pressure sensor (10) is electrically coupled to the elevator control circuit and transmits the pressure value to the elevator control circuit, the elevator control circuit controlling elevator operation based on the pressure value.
The elevator brake operating state detecting device according to claim 1, wherein the elevator brake further comprises a brake arm (7) and a brake shoe (9), and the brake shoe (8) is fixed at the On the brake shoe (9), the brake shoe (9) is mounted on the pin bush (11) by a pin (12), which is mounted together with the pressure sensor (10) On the brake arm (7), the pressure sensor (10) is disposed between the pin sleeve (11) and the brake arm (7).
The elevator brake operating state detecting device according to claim 2, wherein the brake arm (7) is provided with a recess for placing the pressure sensor (10);

A pin sleeve (11) is disposed around the pin (12), the pin (12) and the pin sleeve (11) pass through a through slot of the brake arm (7), and the pressure sensor (10) is closely attached. On the pin sleeve (11).
The elevator brake operating state detecting device according to claim 3, wherein the pressure sensor (10) is fixed to the brake arm (7) by a locking screw (13);

One side of the pin sleeve (11) is provided with a compression spring (17), and the pressure spring (17) and the pressure sensor (10) are disposed on opposite sides of the pin sleeve (11).
The elevator brake operating state detecting device according to any one of claims 1 to 4, wherein the elevator control circuit comprises a pressure processing circuit and an elevator mainboard circuit, and the pressure sensor (10) electrically connects the pressure processing a circuit, the pressure processing circuit electrically connecting the elevator mainboard circuit;

The pressure processing circuit determines whether the pressure value detected by the pressure sensor (10) reaches a preset value, and transmits the determination result to the elevator mainboard circuit.
The elevator brake operating state detecting device according to claim 5, wherein two elevator brakes are disposed in the elevator, and each of the elevator brakes is provided with one of the pressure sensors (10), two of the a pressure sensor (10) is connected to the pressure processing circuit;

The pressure processing circuit determines whether the pressure values detected by the two pressure sensors (10) reach a preset value, and transmits the determination result to the elevator mainboard circuit.
The elevator brake operating state detecting device according to claim 6, wherein the pressure processing circuit comprises a first switch, a second switch, a third switch, and a fourth switch, and the pressure processing circuit passes the first a switch and a second switch are connected to the closing monitoring point of the elevator mainboard circuit; the pressure processing circuit is connected to the first opening monitoring point of the elevator mainboard circuit through the third switch; the pressure processing circuit passes the a fourth switch is connected to the second opening monitoring point of the elevator mainboard circuit;

Before the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors (10) are higher than the first preset value, and the first switch and the second switch are turned on, the elevator mainboard circuit Monitoring the closing monitoring point is normal, the elevator starts; otherwise the elevator is locked;

After the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors (10) are lower than the second preset value, and the third switch and the fourth switch are turned on, and the elevator mainboard circuit monitors The first opening monitoring point and the second opening monitoring point are normal, and the elevator is normally operated; otherwise, the elevator is locked.
The elevator brake operating state detecting device according to claim 1, wherein the elevator brake further comprises a brake arm (7) and a brake shoe (9), and the brake shoe (8) is fixed at the Said brake shoe (9), said brake shoe (9) is mounted on said brake arm (7) by a pin (12) and a pin sleeve (11);

One end of the brake arm (7) is provided with an adjusting screw (5) corresponding to the iron core (4) in the driving device, and the pressure sensor (10) is disposed at the adjustment Between the screw (5) and the iron core (4), the pressure value between the adjusting screw (5) and the iron core (4) is detected.
The elevator brake operating state detecting device according to claim 8, wherein said elevator control circuit comprises a pressure processing circuit and an elevator main circuit, said pressure sensor (10) electrically connecting said pressure processing circuit, said pressure Processing circuitry electrically connecting the elevator mainboard circuit;

Two elevator brakes are disposed in the elevator, and each of the elevator brakes is provided with one of the pressure sensors (10), and the two pressure sensors (10) are connected to the pressure processing circuit;

The pressure processing circuit includes a first switch, a second switch, a third switch, and a fourth switch, and the pressure processing circuit is connected to the opening monitoring point of the elevator mainboard circuit through the first switch and the second switch; The pressure processing circuit is connected to the first closing monitoring point of the elevator mainboard circuit through the third switch; the pressure processing circuit is connected to the second closing monitoring point of the elevator mainboard circuit through the fourth switch;

Before the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors (10) are lower than the first preset value, and the third switch and the fourth switch are respectively turned on, the elevator mainboard circuit Monitoring the pressure of the first closing monitoring point and the second closing monitoring point to be normal, and the elevator is started; otherwise, the elevator is locked;

After the elevator is started, the pressure processing circuit determines that the pressure values detected by the two pressure sensors (10) are higher than the second preset value, and the first switch and the second switch are turned on, and the elevator mainboard circuit is turned on. The monitoring of the opening of the gate is normal, and the elevator is in normal operation; otherwise, the elevator is locked.
An elevator brake action state detecting method, characterized in that the elevator brake comprises a pressure sensor (10) for detecting a pressure value between the brake shoe (8) and the brake wheel (14), or for detecting an adjustment screw (5) a pressure sensor (10) with a pressure value between the core (4); the method comprising:

S1, the pressure sensor (10) detects a pressure value between the brake shoe (8) and the brake wheel (14), or the pressure sensor (10) detects the adjustment screw (5) and the iron core (4) the value of the pressure between;

S2: Determine whether the pressure value reaches a preset value, and control the elevator operation according to the judgment result.