CN215160063U

CN215160063U - Manual brake release warning device of elevator brake

Info

Publication number: CN215160063U
Application number: CN202120405974.3U
Authority: CN
Inventors: 刘文锋; 余泗州; 刘伟; 姚忠珍; 李昂
Original assignee: SHENZHEN INSTITUTE OF SPECIAL EQUIPMENT INSPECTION AND TEST
Current assignee: SHENZHEN INSTITUTE OF SPECIAL EQUIPMENT INSPECTION AND TEST
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-12-14
Anticipated expiration: 2031-02-24

Abstract

The utility model relates to a manual brake release warning device of an elevator brake, which comprises a shell connected with a brake release rod, a rod sleeve which is rotatably arranged in the inner cavity of the shell and used for installing a brake release wrench, and a detection warning component; the detection warning assembly comprises a first time length detection switch, a second time length detection switch, a warning device and a main control circuit connected with the first time length detection switch, the second time length detection switch and the warning device; the first time length detection switch and the second time length detection switch are arranged on the inner wall of the shell and are symmetrically arranged on two sides of the rod sleeve, and the warning indicator is arranged on the shell. Dangerous state is prejudged by detecting the duration of manual brake release, and the overspeed risk is reduced and the use safety of the elevator is improved by automatically identifying danger and actively prompting.

Description

Manual brake release warning device of elevator brake

Technical Field

The utility model relates to an elevator safety technical field especially relates to a manual brake release warning device of elevator stopper.

Background

The elevator brake is one of the most important safety protection devices for ensuring the safe operation of the elevator, and provides braking force in the elevator stopping and leveling process, so that an elevator car can be stabilized at the leveling position, and the safe operation of the elevator is ensured; the abnormal operation of the elevator is stopped in time when the elevator breaks down, and the further expansion of the accident is effectively prevented.

An elevator brake (also called a brake release and a brake close) is generally provided with a manual brake release device except that a control system gives a command, and the automatic brake release/close is controlled by a solenoid coil, so that rescue is performed in the case of power failure and fault, or the operation of moving a car by manually releasing the brake is performed during elevator maintenance.

The structure of the elevator is shown in figure 1, an elevator car and a counterweight are respectively suspended at two sides of a driving main machine, and when the elevator stops, the braking force is provided by a brake of the main machine to keep static. Under the condition of manually releasing a brake, an elevator car, a main machine (a traction sheave) and a counterweight are in a free state without braking, at the moment, under the action of gravity, the car and the counterweight generate motion acceleration due to unbalanced weight, and the running direction is determined by the relative weight of the car and the counterweight: when the lift car is lightly loaded/unloaded, the lift car is accelerated to run upwards; the car accelerates downward when it is heavily loaded. Obviously, if the brake is continuously released for a long time, the elevator car will accelerate to a very high speed regardless of direction, which is detrimental to safety.

GB24803.1Y2009 elevator safety requirements first part: 6.4.9 rules for basic safety requirements for elevators: provision should be made to ensure that the changes in vehicle speed and acceleration are limited to minimize the risk of injury to the user, this includes changes in vehicle speed and acceleration under normal and emergency operating conditions.

Therefore, it is necessary to ensure that the elevator speed and acceleration are not harmful to humans even when the brake is released manually. The elevator drive machines currently in use are broadly divided into two categories: a synchronous host and an asynchronous host. The synchronous main machine (mostly used for passenger elevator) is internally provided with a permanent magnet, the synchronous main machine can be provided with a star sealing function (the synchronous main machine runs in a power-off state, self-power generation can generate electromagnetic braking force, the speed is higher, the electromagnetic force is higher, slow balance is achieved), and the elevator cannot overspeed even if the brake is continuously released manually. For elevators driven by a large number of asynchronous main machines (mostly used for freight elevators), no corresponding intrinsic safety measures are provided, and in order to prevent overspeed during manual brake release, the most common method is to adopt an intermittent brake release mode during specified operation, namely, brake release, free acceleration of a weight-unbalanced elevator, closing, elevator stopping and brake re-releasing, and the operation is circulated so as to move the elevator car to a target position at a slow speed. At present, most manufacturers take precautionary measures that a corresponding operation method description is posted near a manual operation position, and an operator is required to standardize operation according to a prompt mode, so that the aim that manual operation cannot be overspeed is achieved, namely, prompt documents are posted to standardize operation. Such passive advisory documents are extremely easily ignored by the operator and, in the event of a manual brake release, are inadvertently or unexpectedly operated, can have a number of consequences, less so damaging hoistway equipment and more so frightening or injuring car passengers.

GB15076-2012 general rules for mechanical safety design: the 6.1 regulation of Risk assessment and Risk reduction, the reduction of the risk is implemented according to a three-step method, namely an intrinsic safety design measure, a safety protection and/or supplementary protection measure, and a safety operation method using information supplement and prompt.

The star-sealing design for preventing overspeed when the synchronous main machine drives the elevator to manually release in the foregoing description belongs to an intrinsic safety design measure. And the manual brake release overspeed prevention measure of the asynchronous host driven elevator is the third measure, namely, the safety risk is prompted by using information, so that the method has a larger improvement space.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is in, a manual brake release warning device of elevator stopper is provided.

The utility model provides a technical scheme that its technical problem adopted is: the manual brake release warning device for the elevator brake comprises a shell connected with a brake release rod, a rod sleeve rotatably arranged in an inner cavity of the shell and used for installing a brake release wrench, and a detection warning assembly;

the detection warning assembly comprises a first time length detection switch, a second time length detection switch, a warning device and a main control circuit connected with the first time length detection switch, the second time length detection switch and the warning device;

the first time length detection switch and the second time length detection switch are arranged on the inner wall of the shell and are symmetrically arranged on two sides of the rod sleeve, and the warning indicator is arranged on the shell;

the brake release wrench rotates to drive the rod sleeve to rotate so that the rod sleeve is in contact with the first time length detection switch or the second time length detection switch, the first time length detection switch or the second time length detection switch collects and sends detection signals to the main control circuit, and the main control circuit receives and processes the detection signals and sends control signals to control the working state of the alarm.

Preferably, the detection warning assembly further comprises a starting switch arranged inside the rod sleeve and connected with the main control circuit.

Preferably, the manual brake release warning device of the elevator brake further comprises an elastic member connecting the periphery of the rod sleeve and the inner wall of the shell.

Preferably, the elastic member includes a spring.

Preferably, the housing is funnel-shaped and comprises a positioning part detachably mounted in a mounting hole of the brake release rod and a mounting part connected with the positioning part, and the positioning part is communicated with an inner cavity of the mounting part;

the lower part of the rod sleeve is rotatably arranged in the inner cavity of the positioning part through a connecting shaft, and the upper part of the rod sleeve extends into the inner cavity of the mounting part.

Preferably, the rod sleeve is provided with an internal thread on the circumferential inner wall.

Preferably, the alarm comprises a sounder and/or a warning light.

Preferably, the first duration detection switch and the second duration detection switch are arranged in an area covered by the rotation direction and the amplitude of the rod sleeve.

Preferably, the power supply module is connected with the detection warning component to supply power to the detection warning component.

Preferably, the housing and the rod sleeve are metal pieces.

Implement the utility model discloses following beneficial effect has: this manual brake release warning device of elevator stopper comes prejudgement dangerous state through detecting when manual brake release is long, through automatic identification danger, initiative suggestion, reduces the overspeed risk, improves elevator safety in utilization.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural view of an asynchronous main machine driven elevator;

FIG. 2 is a schematic structural view of a brake release lever and a brake core;

FIG. 3 is a schematic structural view of the brake release wrench;

fig. 4 is a schematic structural view of a manual brake release warning device of an elevator brake according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a manual brake release warning device of an elevator brake according to another embodiment of the present invention;

fig. 6 is a circuit diagram of the main control circuit of the present invention;

fig. 7 is a circuit diagram of the power supply circuit of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate that the device or element referred to must have a specific direction, and thus, should not be construed as limiting the present invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. The terms "first", "second", "third", etc. are only for convenience in describing the present technical solution, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 2 and 3, the brake core 100 and the brake release lever 200 are fixed components of the elevator driving machine, and the brake release wrench 300 is a detachable component and is suspended in the machine room when not in use. When a common asynchronous host machine is used for manually releasing a brake, a brake releasing wrench 300 is installed in a mounting hole 201 of a brake releasing rod 200 to drive the brake releasing rod 200 to rotate by a certain angle (the hosts of different brands and the general angle is 30-60 degrees) along the axis of the brake releasing rod 200, an electromagnetic iron core inside a brake iron core 100 is jacked open, the brake is released, and an elevator car is freely accelerated under the action of gravity. The elevator brake is normally closed, namely when the brake releasing wrench is not operated by a person, the brake is automatically closed.

As shown in fig. 4, be the utility model discloses a manual brake release warning device of elevator stopper, include the shell 1 of being connected with stopper brake release pole, rotatable install in the rod cover 2 that 1 inner chamber of shell is used for supplying the installation of brake release spanner 300 to and detect warning subassembly, should detect warning subassembly includes long detection switch 6 and the attention device when first time length detection switch 5, second, and the master control circuit who is connected with long detection switch 6 and the attention device when first time length detection switch 5 and second.

The first time length detection switch 5 and the second time length detection switch 6 are arranged on the inner wall of the shell 1 and symmetrically arranged on two sides of the rod sleeve 2, and the warning indicator is arranged on the shell 1. Further, the first duration detection switch 5 and the second duration detection switch 6 are disposed in the area covered by the rotation direction and the amplitude of the lever sleeve 2.

The brake release wrench 300 rotates to drive the rod sleeve 2 to rotate, so that the rod sleeve 2 is in contact with the first time length detection switch 5 or the second time length detection switch 6, the first time length detection switch 5 or the second time length detection switch 6 collects and sends detection signals to the main control circuit, and the main control circuit receives and processes the detection signals and sends control signals to control the working state of the alarm.

Preferably, the detection warning assembly further includes a start switch 7 disposed inside the rod sleeve 2 and connected to the main control circuit, and the start switch 7 is configured to detect a connection state of the brake release wrench 300, and when the brake release wrench 300 is screwed into the rod sleeve 2, the start switch 7 is triggered, so that the main control circuit enters a working state.

In this embodiment, the housing 1 is funnel-shaped, and includes a positioning portion 11 detachably mounted in the mounting hole 201 of the brake release lever 200, and a mounting portion 12 connected to the positioning portion 11, the positioning portion 11 is communicated with the inner cavity of the mounting portion 12, the positioning portion 11 is substantially a cylindrical structure and can be positioned and mounted in the mounting hole 201, and the mounting portion 12 is substantially a hemispherical structure with an opening for mounting a detection warning component and the like.

The lower part of the rod sleeve 2 is rotatably mounted in the cavity of the positioning part 11 through the connecting shaft 3, and the upper part thereof extends into the cavity of the mounting part 12. The rod sleeve 2 can rotate slightly in the shell 1 along the connecting shaft 3.

Preferably, the manual brake release warning device of the elevator brake further comprises an elastic member 4 connecting the outer periphery of the rod sleeve 2 and the inner wall of the housing 1. The elastic member 4 includes a spring. The function of which is mainly to reposition the rod sleeve 2. In the present embodiment, the rod cover 2 may be mostly installed in the positioning portion 11, and the spring may be provided in the positioning portion 11, or may be provided at the intersection of the positioning portion 11 and the installation portion 12. It is understood that the springs on both sides hold the lever sleeve 2 at the neutral position in the initial state in which the lever sleeve 2 does not contact the first duration detection switch 5 or the second duration detection switch 6.

As shown in fig. 5, in some embodiments, the lower portion of the rod cover 2 is installed in the positioning portion 11, and the bottom portion thereof is kept at a predetermined distance from the bottom wall of the positioning portion 11, while the middle upper portion of the rod cover 2 extends to the inner cavity of the installation portion 12, at which time, the spring may be disposed in the installation portion 12 and in the region of the swing direction of the rod cover 2.

Preferably, the inner circumferential wall of the rod sleeve 2 is provided with an internal thread, and the rod part of the trip wrench 300 is provided with an external thread, which are connected by a thread.

In the present embodiment, the alarm comprises a sounder 8 (or buzzer) and/or a warning light 9. This warning light 9 can be LED lamp pearl, can adopt different photochromic of light to indicate the condition of declutching, and if blue green etc. indicate that the condition of declutching is gentle, the scarlet yellow color indicates that the condition of declutching needs attention. The warning indicator may be located on the outside of the housing 1 for viewing.

The device further comprises a power module which is connected with the detection warning component to supply power to the detection warning component, and the power module can be powered by a battery or can be connected with alternating current and then processed into current with preset power, and the device is not limited specifically here. In this embodiment, the components of the detection alarm assembly are connected by wires (not shown).

Preferably, the housing 1 and the rod sleeve 2 are made of metal, such as titanium steel or stainless steel.

As shown in fig. 6, the main control circuit of this embodiment is configured to process the detection signal collected by the first duration detection switch 5 or the second duration detection switch 6, and send a control signal to control the working state of the alarm according to the processing result.

The main control circuit comprises a processor U1, a resistor R1, a resistor R2, a resistor R3, a resistor R7, a resistor R8, a resistor R9, a resistor R12, a triode Q1, a triode Q2, a capacitor C19, a capacitor C29, a capacitor C39, a crystal oscillator Y1, an LED D8, a sounder (bell), a switch K5, a switch K6 and a switch K7, wherein the processor U1 adopts a single-chip microcomputer AT89S 52. The transistor Q1 and the transistor Q2 both use NPN transistors.

Wherein, the first end of the capacitor C19 is connected with the power supply, the second end is connected with the pin 9 of the processor U1, and the specification of the capacitor C19 is 104; the first end of the resistor R12 is connected with the pin 9 of the processor U1, the second end is grounded, and the resistance value of the resistor R12 can be 5.1k omega; the first end of the crystal oscillator Y1 is grounded through a capacitor C29, the second end of the crystal oscillator Y1 is grounded through a capacitor C39, the first end and the second end of the crystal oscillator Y1 are respectively connected with a pin 18 and a pin 19 of the processor U1, and the specifications of the capacitor C29 and the capacitor C39 are 30 p; first ends of a resistor R1, a resistor R2 and a resistor R3 are all connected with a power supply, a second end of the resistor R1 is connected with a pin 39 of a processor U1 and is connected with a first end of a switch K5, a second end of a resistor R2 is connected with a pin 38 of a processor U1 and is connected with a first end of the switch K6, a second end of a resistor R3 is connected with a pin 37 of the processor U1 and is connected with a first end of the switch K7, second ends of the switch K5, the switch K6 and the switch K7 are all grounded, the switch K5 represents a first time length detection switch 5, the switch K6 represents a second time length detection switch 6, and the switch K7 represents a starting switch 7. The resistances of the resistor R1, the resistor R2, and the resistor R3 may be 1k Ω.

The first end of the resistor R7 is connected with a power supply, the second end of the resistor R7 is connected with the anode of the LED D8, the cathode of the LED D8 is connected with the collector of the triode Q1, the first end of the resistor R6 is connected with the pin 29 of the processor U1, the second end of the resistor R6 is connected with the base of the triode Q1, and the emitter of the triode Q1 is grounded.

The first end of the resistor R8 is connected with a power supply, the second end of the resistor R8 is connected with the first end of the sounder (bell), the second end of the sounder (bell) is connected with the collector of the triode Q2, the first end of the resistor R9 is connected with the pin 24 of the processor U1, the second end of the resistor R9 is connected with the base of the triode Q2, and the emitter of the triode Q2 is grounded. The resistances of the resistor R6, the resistor R7 and the resistor R9 can be 2k omega, and the resistance of the resistor R8 can be 1k omega.

Here, the LED D8 and the sounder (bell) constitute the above-mentioned alarm.

As shown in fig. 7, the power supply circuit of this embodiment includes a power common J1, a fuse F1, a fuse F2, a rectifier bridge, a resistor R4, an LED J3, a voltage regulator U4, a voltage regulator U5, a voltage regulator U6, a filter capacitor C1, a filter capacitor C2, a filter capacitor C3, a filter capacitor C7, a filter capacitor C8, a capacitor C5, a capacitor C6, and a capacitor C16, where in this embodiment, the voltage regulator U4 employs a three-terminal voltage regulation chip, the voltage regulator U5 employs a 7878105 three-terminal voltage regulation chip, and the voltage regulator U6 employs a 7912 three-terminal voltage regulation chip.

The 3 pins and the 1 pin of the power supply common end J1 are respectively connected with a rectifier bridge through a fuse F1 and a fuse F2, the 2 pins of the power supply common end J1 are grounded, the direct current output positive end of the rectifier bridge is connected with the 1 pin of a voltage stabilizer U4, meanwhile, the 2 pins of an LED J3 are also connected through a resistor R4, the direct current output negative end of the rectifier bridge is connected with the 2 pins of the voltage stabilizer U64, and meanwhile, the direct current output negative end of the rectifier bridge is connected with the 1 pin of the LED J3. The resistance R4 is preferably 3k Ω.

The first end of filter capacitor C1 is connected with 1 foot of stabiliser U4, second end ground, the first end of filter capacitor C3 is connected with 3 feet of stabiliser U4, the second end ground, 3 feet of stabiliser U4 are connected with 1 foot of stabiliser U5, the first end of filter capacitor C2 is connected with 3 feet of stabiliser U5, the second end ground, the first end of capacitor C6 is connected with 1 foot of stabiliser U5, the second end ground, the first end of capacitor C5 is connected with 3 feet of stabiliser U5, the second end ground.

The first end of the filter capacitor C7 is grounded, the second end of the filter capacitor C7 is connected with pin 2 of the voltage stabilizer U6, the first end of the filter capacitor C8 is grounded, the second end of the filter capacitor C8 is connected with pin 3 of the voltage stabilizer U6, and the first end of the capacitor C16 is grounded, and the second end of the capacitor C16 is connected with pin 3 of the voltage stabilizer U6. Pin 2 of regulator U4, pin 2 of regulator U5, and pin 1 of regulator U6 are all grounded.

The filter capacitor C1 and the filter capacitor C7 can be selected from 1000uF/50V, the filter capacitor C3 and the filter capacitor C8 can be selected from 470uF/25V, the filter capacitor C2 can be selected from 220uF/25V, and the capacitor C5 and the capacitor C16 are selected from 104 specifications. In some embodiments, the power source may be directly replaced by direct current (four 1.2v dry cell batteries in parallel). Of course, other power supply schemes are possible, and are not specifically limited herein.

The working principle of the manual brake release warning device of the elevator brake is as follows: when the manual brake releasing operation is carried out, an operator screws the brake releasing wrench 300 into the rod sleeve 2, at the moment, the starting switch 7 in the rod sleeve 2 is triggered, and the main control circuit is electrified. When operating personnel carries out the release, release spanner 300 rotates along with rod cover 2 along connecting axle 3, touch the long detection switch 6 of the first time length detection switch 5 or the second of this side, the attention device sends alarm signal, send "drop, drop" suggestion sound if generator (bee calling organ) 8, the scintillation of warning light 9, inside timing circuit (crystal oscillator Y1 part) is opened simultaneously, the frequency of suggestion sound and the scintillation frequency of warning light 9, the time of detecting switch 6 increases and constantly improves when long detection switch 5 or the second is long along with the continuous release contact of single, the volume of suggestion sound constantly increases simultaneously, suggestion operating personnel notices the continuous release time of single. When the operator releases the brake release wrench 12, the brake release wrench 300 automatically resets to the initial state, the brake is switched on, the first time length detection switch 5 or the second time length detection switch 6 resets, the prompt sound stops, and the warning light is turned off.

This manual brake release warning device of elevator stopper is long when the continuous brake release of single is passed through when the manual brake release of automatic monitoring, sends warning signal through the attention device, reaches the effect of initiative suggestion and early warning to operating personnel, and the risk that the overspeed takes place when can taking precautions against manual brake release.

This manual brake release warning device of elevator stopper comes prejudgement dangerous state through detecting when manual brake release is long, through automatic identification danger, initiative suggestion, reduces the overspeed risk, improves elevator safety in utilization.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A manual brake release warning device of an elevator brake is characterized by comprising a shell (1) connected with a brake release rod, a rod sleeve (2) which is rotatably arranged in the inner cavity of the shell (1) and used for installing a brake release wrench (300), and a detection warning component;

the detection warning assembly comprises a first time length detection switch (5), a second time length detection switch (6), a warning device and a main control circuit connected with the first time length detection switch (5), the second time length detection switch (6) and the warning device;

the first time length detection switch (5) and the second time length detection switch (6) are arranged on the inner wall of the shell (1) and are symmetrically arranged on two sides of the rod sleeve (2), and the warning indicator is arranged on the shell (1);

wherein, the spanner that declutches (300) rotate and drive rod cover (2) rotate and make rod cover (2) with first time length detect switch (5) or length of time detect switch (6) contact is gone up to the second, first time length detect switch (5) or length of time detect switch (6) are gathered and are sent detecting signal to master control circuit in the second, master control circuit receives and handles detecting signal to send control signal control the operating condition of attention device.

2. The manual brake release warning device of an elevator brake according to claim 1, wherein the detection warning assembly further comprises a starting switch (7) disposed inside the rod sleeve (2) and connected to the main control circuit.

3. The manual brake release warning device of an elevator brake according to claim 1, further comprising an elastic member connecting an outer periphery of the lever sleeve (2) and an inner wall of the housing (1).

4. The elevator brake manual brake release warning device of claim 3, wherein the resilient member comprises a spring.

5. The manual brake release warning device of the elevator brake as claimed in claim 1, wherein the housing (1) is funnel-shaped and comprises a positioning part (11) detachably mounted in a mounting hole of the brake release lever and a mounting part (12) connected with the positioning part (11), and the positioning part (11) is communicated with an inner cavity of the mounting part (12);

the lower part of the rod sleeve (2) is rotatably arranged in the inner cavity of the positioning part (11) through a connecting shaft (3), and the upper part of the rod sleeve extends into the inner cavity of the mounting part (12).

6. The manual brake release warning device of an elevator brake as claimed in claim 5, wherein the rod sleeve (2) is provided with an internal thread on the circumferential inner wall.

7. The elevator brake manual brake release warning device of claim 1, wherein the warning indicator comprises a sounder and/or a warning light.

8. The manual brake release warning device of an elevator brake, according to claim 1, characterized in that the first time length detection switch (5) and the second time length detection switch (6) are disposed in an area covered by the rotation direction and amplitude of the lever sleeve (2).

9. The elevator brake manual brake release warning device of claim 1, further comprising a power module coupled to the detection warning assembly to provide power to the detection warning assembly.

10. The manual brake release warning device of an elevator brake according to claim 1, characterized in that the housing (1) and the lever sleeve (2) are metal pieces.