CN111392365B - Band-type brake pull-cord switch device with self-locking function - Google Patents
Band-type brake pull-cord switch device with self-locking function Download PDFInfo
- Publication number
- CN111392365B CN111392365B CN202010228032.2A CN202010228032A CN111392365B CN 111392365 B CN111392365 B CN 111392365B CN 202010228032 A CN202010228032 A CN 202010228032A CN 111392365 B CN111392365 B CN 111392365B
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- self
- pull
- connecting rod
- shell
- locking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H17/00—Switches having flexible operating part adapted only for pulling, e.g. cord, chain
- H01H17/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H17/00—Switches having flexible operating part adapted only for pulling, e.g. cord, chain
- H01H17/26—Switches having flexible operating part adapted only for pulling, e.g. cord, chain having two flexible operating parts; having a single operating part adapted for pulling at both ends
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention relates to a band-type brake pull-cord switch device with a self-locking function, and belongs to the technical field of pull-cord switch devices. Comprises a shell fixed on a base and an action connecting rod hinged at one end of the shell; the end part of the action connecting rod is bound and connected with a pull rope; the action connecting rod is hinged with the shell through a rotating shaft, the rotating shaft extends into the shell, and a chuck is fixedly arranged at the inner end of the rotating shaft; an electromagnetic self-locking device capable of locking the chuck is fixedly arranged at the upper end in the shell. The invention is provided with the electromagnetic self-locking device, and when the pull-cord switch is triggered, the electromagnetic self-locking device can lock the chuck and the movable connecting rod in a disconnected state, so that a pull-cord switch self-locking state can be formed, and the safety coefficient of personnel and equipment is further improved.
Description
Technical Field
The invention relates to a band-type brake pull-cord switch device with a self-locking function, and belongs to the technical field of pull-cord switch devices.
Background
In steel plants, large and small belt conveyors are found everywhere, whether in the plant or in the workshop. A safety protection device, namely a pull rope switch, is arranged on each of two sides of the belt conveyor, and has the functions of rapidly pulling a pull rope on a switch to disconnect the control loop current of equipment so as to stop the equipment and protect the equipment or personnel from being injured in emergency situations. However, in a general pull switch, after a long period of use, the internal devices may be degraded, and the switch may recover itself when turned off, or may not function to protect safety of personnel and equipment by turning off the circuit. There is a great potential safety hazard.
Disclosure of Invention
The invention aims to provide a band-type brake pull-cord switch device with a self-locking function.
In order to achieve the purpose, the invention adopts the technical scheme that:
a band-type brake pull-cord switch device with a self-locking function comprises a shell fixed on a base and an action connecting rod hinged to one end of the shell; the end part of the action connecting rod is bound and connected with a pull rope; the action connecting rod is hinged with the shell through a rotating shaft, the rotating shaft extends into the shell, and a chuck is fixedly arranged at the inner end of the rotating shaft; an electromagnetic self-locking device capable of locking the chuck is fixedly arranged at the upper end in the shell.
The technical scheme of the invention is further improved as follows: the electromagnetic self-locking device comprises a fixed support fixedly connected with the shell, two movable supports which are hinged at the lower end of the fixed support and are oppositely arranged, and electromagnets which are fixed on the movable supports and can attract each other; the two movable brackets are connected by a return spring; after the rotating shaft drives the chuck to rotate, the chuck is positioned between the two electromagnets.
The technical scheme of the invention is further improved as follows: the movable support is L-shaped; the upper end of the long rod section of the movable support is connected with the lower end of the fixed support, and the electromagnet is fixed at the end part of the short rod section; the movable bracket is in an inclined state under the support of the return spring.
The technical scheme of the invention is further improved as follows: the return spring is arranged on the upper part of the long rod section of the movable support, and two ends of the return spring are fixedly connected with the long rod section.
The technical scheme of the invention is further improved as follows: the two pull ropes are respectively connected with the two ends of the action connecting rod.
The technical scheme of the invention is further improved as follows: the electromagnetic self-locking device is positioned on one side of the rotating action direction of the action connecting rod, and a stop block which plays a role in positioning and limiting the rotation of the action connecting rod is fixedly arranged on the outer side of the shell corresponding to the electromagnetic self-locking device; the middle part of the action connecting rod is connected with a reset pull rod.
The technical scheme of the invention is further improved as follows: the control circuit trigger switch of the electromagnetic self-locking device is taken from an auxiliary normally-open point group on the equipment contactor.
The technical scheme of the invention is further improved as follows: the electromagnet is connected with a power supply through a normally closed contact KM and a reset switch SBF; the normally closed contact KM is controlled by an electromagnetic coil connected in series in a machine motor control circuit, and a pull-cord switch LK is also connected in series in the machine motor control circuit.
The technical scheme of the invention is further improved as follows: the reset switch SBF is a two-gear knob switch.
Due to the adoption of the technical scheme, the invention has the following technical effects:
the pull-cord switch is provided with the electromagnetic self-locking device, when the pull-cord switch is triggered, the electromagnetic self-locking device can tightly lock the rotated chuck together with the movable connecting rod, and the action connecting rod is in a disconnected state, so that the pull-cord switch is in a self-locking state, and the safety coefficient of personnel and equipment is further improved.
According to the electromagnetic self-locking device, the control circuit of the electromagnet is integrated into the control circuit of the machine motor, so that the electromagnetic self-locking device can be started while the machine motor is cut off, and the working reliability of the device is ensured.
The electromagnets in the electromagnetic self-locking device are fixed on the two movable supports, the two electromagnets are oppositely arranged and can attract when electrified, the chuck can be just positioned between the two electromagnets after rotating, and the two electromagnets form band-type locking on the chuck. Meanwhile, a return spring is arranged between the two movable supports, and the movable supports can return to an initial state after the electromagnet is powered off under the action of the return spring.
The stop block is fixedly arranged on the outer side of the shell corresponding to the electromagnetic self-locking device, and can play a role in positioning and limiting the action connecting rod when the action connecting rod rotates by a certain angle, so that the action connecting rod can be just positioned between the two electromagnets after rotating by a certain angle, the clamping effect of the two electromagnets on the chuck is ensured, and the working reliability of the device is improved.
The two ends of the action connecting rod are connected with two pull ropes, and the two pull ropes extend towards opposite directions. When the pull-cord switch needs to be triggered, any pull cord is pulled. The two pull ropes are in two opposite directions, so that the pull rope switch can be started quickly in time no matter which direction the worker is in.
The invention has reasonable structure, reliable work and good safety performance.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic view of the interior of the housing of the present invention;
FIG. 3 is a circuit diagram of the motor control circuit of the machine of the present invention;
FIG. 4 is a circuit diagram of the control of the electromagnet of the present invention;
the device comprises a pull rope 1, a pull rope 2, an action connecting rod 3, a shell 4, a stop dog 5, a restoring pull rod 6, a base 7, a rotating shaft 8, a wire inlet hole 9, a fixed support 10, a return spring 11, a movable support 12, an electromagnet 13 and a chuck.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific embodiments:
the invention relates to a band-type brake pull-cord switch device with a self-locking function, which is an improvement on a pull-cord switch, and the pull-cord switch is a safety protection device of a belt conveyor.
The invention relates to a band-type brake pull-cord switch device with a self-locking function, which is characterized in that a band-type self-locking device is arranged on a pull-cord switch, and the band-type self-locking device is formed by an electromagnet in a triggering state, so that the pull-cord switch device has the self-locking function and better safety.
As shown in fig. 1 and 2, the band-type pull switch device includes a housing 3 fixed to a base 3, and an operating link 2 hinged to one end of the housing 3. Action connecting rod 2 fixed connection is provided with pivot 7, and through the articulated outer end that sets up at casing 3 of pivot 7, action connecting rod 2 can rotate under the external drive. A pull rope 7 is tied and connected to an end of the operating link 2, and the operating link 2 is driven to rotate by pulling the pull rope 7. Preferably, the pulling rope 7 is provided at both ends of the action link 2, that is, two pulling ropes 7 are provided for the action link 2.
As shown in fig. 2, the actuating link 2 is hinged to the housing 3 via a rotating shaft 7, and the rotating shaft 7 extends into the housing 3. A chuck 13 is fixedly arranged at the inner end of the rotating shaft 7, and an electromagnetic self-locking device capable of locking the chuck 13 is fixedly arranged at the upper end in the shell 3. The chuck 13 is a plate-shaped structure, and when the trigger is triggered, the rotating shaft 7 drives the chuck 13 to rotate for a certain angle and then is locked by the electromagnetic self-locking device.
The invention mainly improves the structure of the electromagnetic self-locking device. The preferred setting mode is that the electromagnetic self-locking device comprises a fixed support 9, a movable support 11 and an electromagnet 12. Wherein, the upper end of the fixed support 9 is fixedly connected with the inner wall of the shell 3, the lower end of the fixed support 9 is hinged with a movable support 11, and the lower end of the movable support 11 is fixedly provided with an electromagnet 12. The movable support 11 is provided with two movable supports, and the upper ends of the movable supports are jointed with the fixed support 9. Electromagnets 12 are respectively and fixedly arranged at the lower ends of the two movable brackets 11, and the two electromagnets 12 can attract each other after being electrified. A return spring 10 is further arranged between the two movable supports 11, and two ends of the return spring 10 are respectively connected with the two movable supports 11. Under the supporting action of the return spring 10, the two movable brackets 11 are in an open state, and the two electromagnets 12 are in a separated state. After the electromagnet 12 is electrified, the electromagnet and the movable bracket are mutually attracted and close, so that the two movable brackets 11 compress the return spring 10. After the electromagnets 12 are de-energized, the return springs 10 release the energy stored in the compression to separate the two electromagnets 12. The two electromagnets 12 play a role of band-type brake locking to lock the chuck 13. During the triggering action, the rotating shaft 7 drives the chuck 13 to rotate for a certain angle, and the chuck 13 is just positioned between the two electromagnets 12 after the rotation. The outer wall of the shell 3 is provided with a wire inlet hole 8 for installing a wire.
The electromagnetic self-locking device is positioned at one side of the rotating action direction of the action connecting rod 2, and in order to prevent the rotating angle of the action connecting rod 2 from being too large or too small, the electromagnetic self-locking device can be positioned between the two electromagnets 12 right after rotating for a certain angle, and a stop block 4 is fixedly arranged at the outer side of the shell 3 corresponding to the electromagnetic self-locking device. In the triggering state, the action connecting rod 2 is driven to rotate by using the pull rope 7, the action connecting rod 2 rotates to touch the stop block 4, and the action connecting rod 2 is just positioned between the two electromagnets 12. The stopper 4 serves as a positioning restriction of the actuating link 2. Furthermore, a reset pull rod 5 is connected and arranged in the middle of the action connecting rod 2, and when the action connecting rod 2 needs to be reset, the reset pull rod 5 is pulled. Referring to fig. 1, when the actuating link 2 is actuated, it rotates clockwise, and the actuating link 2 touches the stopper 4 located at the upper right side.
The electromagnetic self-locking device can also be provided with an electromagnet, then the chuck 13 is made of ferromagnetic materials, and the attraction of the electromagnet to the chuck is utilized to realize the locking of the chuck.
The invention improves the arrangement of the movable bracket 11, and the movable bracket 11 is L-shaped. The movable bracket 11 includes a long pole section and a short pole section which are integrally formed. The upper end of the long rod section is connected with the lower end of the fixed support 9, and the electromagnet 12 is fixed at the lower end of the short rod section. As shown in particular in fig. 2. The L-shape of the movable bracket 11 is in an inclined state, the openings of the two L-shaped movable brackets 11 are oppositely arranged, and the two electromagnets 12 are oppositely arranged. The return spring 12 is arranged on the long rod section of the movable support 11, and two ends of the return spring 10 are fixedly connected with the long rod section. The movable bracket 11 is in a tilted state under the supporting action of the return spring 12.
In a specific embodiment, two ropes 1 are provided, and as shown in fig. 1, the two ropes 1 are connected to both ends of an operating link 2. The two pull ropes 1 extend in opposite directions, and when the trigger is needed, any one pull rope 1 can be pulled. The two pull ropes 1 are in two opposite directions, so that the pull rope switch can be quickly started in time no matter which direction the worker is in.
The electromagnetic self-locking device is provided with a control circuit to control the power-on and power-off state of the electromagnet. The control circuit trigger switch is taken from an auxiliary normally-on point group on the equipment contactor. As shown in fig. 3, the control circuit diagram of the motor of the machine is provided, and a pull switch LK is connected in series in the circuit.
As shown in fig. 4, the control circuit diagram of the electromagnet YA is connected to the power source through the normally closed contact KM and the reset switch SBF. The normally closed contact is controlled by a solenoid KM which is connected in series in a machine motor control circuit. In a specific implementation, the reset switch SBF is preferably set to a two-position knob switch.
The working principle of the device is as follows: when the electromagnetic coil KM works normally, the electromagnetic coil KM is electrified, and the normally closed contact KM is in a disconnected state. When the pull-cord switch acts, the internal structure can be driven to disconnect the power supply of the equipment control loop, the contactor coil of the control equipment is powered off, and the normally-closed contact KM is restored to a normally-closed state. At the moment, the electromagnet 12 is electrified and is attracted with the chuck 13, the action connecting rod 2 is tightly fixed in a disconnected state, a self-locking state is formed, a certain safety function is achieved, and the safety factor of personnel and equipment is improved.
When the power-on recovery is needed, only the manual switch of the control electromagnet 12 needs to be controlled to be turned off, and the manual switch is the reset switch SBF in the figure 4. After the electromagnet 12 is powered off, the return spring 10 returns to the original state, and the movable connecting rod 11 returns to the original state.
According to the invention, the pull-cord switch is provided with the electromagnetic self-locking device, so that the rotated chuck and the movable connecting rod can be tightly locked when the pull-cord switch is triggered, the action connecting rod is in a disconnected state, the pull-cord switch is in a self-locking state, and the safety coefficient of personnel and equipment is improved.
Claims (6)
1. The utility model provides a band-type brake formula stay cord switching device with self-locking function which characterized in that: comprises a shell (3) fixed on a base and an action connecting rod (2) hinged at one end of the shell (3); the end part of the action connecting rod (2) is bound and connected with a pull rope (1); the action connecting rod (2) is hinged with the shell (3) through a rotating shaft (7), the rotating shaft extends into the shell (3), and a chuck (13) is fixedly arranged at the inner end of the rotating shaft (7); an electromagnetic self-locking device capable of locking the chuck (13) is fixedly arranged at the upper end in the shell (3);
the electromagnetic self-locking device comprises a fixed support (9) fixedly connected with the shell (3), two movable supports (11) which are hinged at the lower end of the fixed support (9) and are oppositely arranged, and electromagnets (12) which are fixed on the movable supports (11) and can attract each other; the two movable brackets (11) are connected by a return spring (10); after the rotating shaft (7) drives the chuck (13) to rotate, the chuck (13) is positioned between the two electromagnets (12);
a control circuit trigger switch of the electromagnetic self-locking device is taken from an auxiliary normally-open point group on the equipment contactor, and the electromagnet is connected with a power supply through a normally-closed contact KM and a reset switch SBF; the normally closed contact KM is controlled by an electromagnetic coil connected in series in a machine motor control circuit, and a pull-cord switch LK is also connected in series in the machine motor control circuit.
2. The band-type brake pull-cord switch device with the self-locking function according to claim 1, characterized in that: the movable support (11) is L-shaped; the upper end of the long rod section of the movable support (11) is connected with the lower end of the fixed support (9), and the electromagnet (12) is fixed at the end part of the short rod section; the movable bracket (11) is in an inclined state under the support of the return spring (10).
3. The band-type brake pull-cord switch device with the self-locking function according to claim 2, characterized in that: the return spring (10) is arranged on the upper part of the long rod section of the movable support (11), and two ends of the return spring (10) are fixedly connected with the long rod section.
4. The band-type brake pull-cord switch device with the self-locking function according to claim 1, characterized in that: two pull ropes (1) are arranged and are respectively connected with two ends of the action connecting rod (2).
5. The band-type brake pull-cord switch device with the self-locking function according to claim 1, characterized in that: the electromagnetic self-locking device is positioned on one side of the rotating action direction of the action connecting rod (2), and a stop block (4) which plays a role in positioning and limiting the rotation of the action connecting rod (2) is fixedly arranged on the outer side of the shell (3) corresponding to the electromagnetic self-locking device; the middle part of the action connecting rod (2) is connected with a reset pull rod (5).
6. The band-type brake pull-cord switch device with the self-locking function according to claim 1, characterized in that: the reset switch SBF is a two-gear knob switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228032.2A CN111392365B (en) | 2020-03-27 | 2020-03-27 | Band-type brake pull-cord switch device with self-locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228032.2A CN111392365B (en) | 2020-03-27 | 2020-03-27 | Band-type brake pull-cord switch device with self-locking function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111392365A CN111392365A (en) | 2020-07-10 |
| CN111392365B true CN111392365B (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010228032.2A Active CN111392365B (en) | 2020-03-27 | 2020-03-27 | Band-type brake pull-cord switch device with self-locking function |
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| Country | Link |
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| CN (1) | CN111392365B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113460615B (en) * | 2021-07-06 | 2022-11-04 | 安徽溢彩玻璃器皿有限公司 | Safety shutdown device for glass production belt conveyor |
| CN116197976B (en) * | 2022-12-08 | 2023-11-10 | 江苏客丰家具有限公司 | Auxiliary positioning device for splicing furniture products |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201473162U (en) * | 2009-08-28 | 2010-05-19 | 浙江怡达快速电梯有限公司 | Ladder brake apparatus |
| CN201694634U (en) * | 2010-04-29 | 2011-01-05 | 沈阳中煤工程技术有限公司 | Pull-cord switch with auto-lock function for belt conveyor |
| CN201817076U (en) * | 2010-10-15 | 2011-05-04 | 洞头县华强电器机械厂 | Special bidirectional pull switch |
| CN203199605U (en) * | 2013-03-18 | 2013-09-18 | 孟庆君 | Belt conveyor pulled rope emergency-stop switch self-locking device |
| CN205972793U (en) * | 2016-08-25 | 2017-02-22 | 晋城市奋钧电子科技有限公司 | Conveyer belt of area scintillation pilot lamp draws cord switch |
| KR20190076312A (en) * | 2017-12-22 | 2019-07-02 | 정낙천 | Pull cord switch |
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2020
- 2020-03-27 CN CN202010228032.2A patent/CN111392365B/en active Active
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| CN111392365A (en) | 2020-07-10 |
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