CN202261218U - Limit combination switch - Google Patents
Limit combination switch Download PDFInfo
- Publication number
- CN202261218U CN202261218U CN2011203550486U CN201120355048U CN202261218U CN 202261218 U CN202261218 U CN 202261218U CN 2011203550486 U CN2011203550486 U CN 2011203550486U CN 201120355048 U CN201120355048 U CN 201120355048U CN 202261218 U CN202261218 U CN 202261218U
- Authority
- CN
- China
- Prior art keywords
- electromagnetic proximity
- switch
- utility
- model
- proximity switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The utility model puts forward a limit combination switch comprising: a casing; a relay which is arranged in the casing and connected with a power supply; and at least one electromagnetic proximity switch which is arranged in the casing and used for detecting a wire cable, wherein when the at least one electromagnetic proximity switch detects that the wire cable approaches, the relay cuts off the power supply. The limit combination switch of the utility model has the beneficial effects that: the electromagnetic proximity switches are employed to manufacture the limit combination switch, and a counter weight needs not to be installed, thus the electromagnetic proximity switches are not acted on by any outside force; in addition, the electromagnetic proximity switches of the limit combination switch do not contact with and collide with an operating object, thus reliability of the limit combination switch of the utility model can be raised.
Description
Technical field
The utility model relates to machinery manufacturing technology field, particularly a kind of spacing unit switch that is used for hoisting equipment.
Background technology
The Weight type travel switch is the lifting control limit switch that rane trolley equipment extensively adopts, and never has big improvement for many years, in use, has the defective in the more Machine Design.And the casing of Weight type travel switch is processed with ferrous material; Cause its casing thin excessively, weight and counterweight weight total head cause the stop box deformation in casing one side through regular meeting; Thereby cause the mechanism's displacement in the casing; The problem that causes is many, poor reliability, coefficient of safety are little, difficult in maintenance, it is high to change frequency, and under hot environment, the many environment of dust, damages more serious.
Existing Weight type travel switch has following defective:
1, Weight type limit switch inside only is provided with a pair of normally closed interlock, occurs situation such as dislocation, loose contact easily;
2, the rotation cover is deviate from easily or is crowded bad, makes limit switch malfunctioning;
When 3, box deformation is serious, can cause inner conductive body and housing contacts, thereby cause electric shock accidents;
4, weight is suspended on the steel cable next door, is strapped on the steel cable with clamp, with the steel cable friction, damages steel cable easily at any time, causes the accident.
The utility model content
The utility model is intended to solve the technical problem that exists in the prior art at least, has proposed a kind of spacing unit switch.
The utility model provides a kind of spacing unit switch, comprising: casing; Be installed in the relay in the said casing, said relay links to each other with the dependent interaction power supply; Be installed at least one electromagnetic proximity switch in the said casing, said at least one electromagnetic proximity switch detects steel cable, when said at least one electromagnetic proximity switch detect steel cable near the time, said relay breaks off said power supply, driving being carried bucket and stopping.
In an embodiment of the utility model, said electromagnetic proximity switch is two.
In an embodiment of the utility model, said two electromagnetic proximity switch employing is often opened parallel with one another, and all links to each other with said relay.
In an embodiment of the utility model, said spacing unit switch is installed on the support of the major and minor hook rope drum of corresponding lifting.
The limit switch that the utility model adopts electromagnetic proximity switch to make need not to install weight, so electromagnetic proximity switch itself does not receive any external force effect.In addition, the electromagnetic proximity switch of the utility model does not contact with the object of operation, does not collide, thereby has improved the reliability of the utility model.Move in normal range (NR) if detect object, electromagnetic proximity switch and auxiliary relay are to be in normal condition, when having only the steel cable of lifting to arrive maximum position; Electromagnetic proximity switch just moves, so action frequency is few, the life-span is longer; Both safe and reliable, simple and direct again sensitivity is keeped in repair more convenient.
Additional aspect of the utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize through the practice of the utility model.
Description of drawings
Above-mentioned and/or additional aspect of the utility model and advantage obviously with are easily understood becoming the description of embodiment from combining figs, wherein:
Fig. 1 is the spacing unit switch sketch map of the utility model embodiment;
Fig. 2 is the electromagnetic proximity switch work principle figure of the utility model embodiment.
Embodiment
Describe the embodiment of the utility model below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the utility model, and can not be interpreted as restriction the utility model.
In the description of the utility model; Term " vertically ", " laterally ", " on ", the orientation of indications such as D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " or position relation be for based on orientation shown in the drawings or position relation; Only be for the ease of describing the utility model rather than requiring the utility model therefore can not be interpreted as restriction with specific azimuth configuration and operation to the utility model.
As shown in Figure 1, be the spacing unit switch sketch map of the utility model embodiment.This spacing unit switch comprises casing 3, is installed in the relay 2 in the casing 3 and is installed at least one electromagnetic proximity switch 1 in the casing 3.Wherein, The control power supply of relay 2 links to each other with electromagnetic proximity switch, and the relay main contact links to each other with main circuit power, and 1 pair of steel cable of at least one electromagnetic proximity switch detects; When at least one electromagnetic proximity switch 1 detect steel cable near the time, relay 2 all can deenergization.As shown in Figure 1, in the embodiment of the utility model, electromagnetic proximity switch is two, and is as shown in Figure 2, comprises electromagnetic proximity switch 110 and 120, and two electromagnetic proximity switch 110 and 120 are parallel with one another, and all links to each other with relay 2.
In an embodiment of the utility model, spacing unit switch is installed on the support of the major and minor hook rope drum of corresponding lifting.When mounted; Can lift by crane major and minor hook rope drum in correspondence looks for a correct position to make support; (for example LJ12A3-4-J/EZ) installs electromagnetic proximity switch 1, and with steel cable as move detecting thing, when steel cable during near electromagnetic proximity switch 1; Electromagnetic proximity switch 1 works, and sends signal thereupon.In electromagnetic proximity switch 1 control circuit, relay 2 is housed.When electromagnetic proximity switch 1 sends signal, relay 2 actions.Relay 2 normally-closed contacts actions is disconnected the closed circuit that is serially connected on the relay 2, and the general supply contactor lost efficacy, and cuts off general supply, makes to hang thing and on the control position, stop, and after the pending good accident, recovers can send near the switch normal operation position.
In the utility model, accident treatment subset accident and human accident:
One, equipment breakdown
1, promote the sticking dead or mechanical part of main contactor and be stuck, at this moment, though no-voltage on the control circuit, have machinery stuck after, main contactor is operate as normal in the same old way;
2, control desk is stuck, after run location is stuck, can not in time withdraw from the control position, causes control loop malfunctioning.
This two states all can make and hang thing and rise always or descend, and has only this moment by the rising stop and does to stop together at last control.
Two, human accident
In the operation because misoperation or operator's energy do not concentrate, rise to height after; In time do not withdraw from the control position to operating grip, hang thing and continue to rise or descend, exceed certain position after; Have only the limit switch action that general supply is cut off, equipment is stopped.
In the embodiment of the utility model, electromagnetic type near switch 1 when the irony material near the time, electromagnetic type can be moved near the magnetic sheet in the switch 1, thereby makes contacting or disconnection.Particularly, can select electromagnetic proximity switch open in usual, under normal circumstances; Irony material and certain requirement is arranged near the distance of switch, the utility model just utilizes this specific function, can be installed in electromagnetic proximity switch 1 by the reel; Steel cable is as moving the irony material, and steel cable is in normal range (NR) the time, and electromagnetic proximity switch 1 is failure to actuate; After steel cable is approaching, the electromagnetic proximity switch action.
For guaranteeing the electromagnetic proximity switch dependable performance, moving and do not go wrong, can install with parallel way with two electromagnetic proximity switch at same position.Like this, wherein have an electromagnetic proximity switch to be out of order, the another electromagnetic proximity switch also can spread out of signal, makes the actuating of relay, thereby has guaranteed security control.As long as adhere to regularly detecting near switch, guarantee two near switch in normal condition.
The limit switch that the utility model adopts electromagnetic proximity switch to make need not to install weight, so electromagnetic proximity switch itself does not receive any external force effect.In addition, the electromagnetic proximity switch of the utility model does not contact with the object of operation, does not collide, thereby has improved the reliability of the utility model.Move in normal range (NR) if detect object, electromagnetic proximity switch and auxiliary relay are to be in normal condition, when having only the rising steel cable to arrive maximum position; Electromagnetic proximity switch just moves, so action frequency is few, the life-span is longer; Both safe and reliable, simple and direct again sensitivity is keeped in repair more convenient.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained among at least one embodiment or example of the utility model.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described the embodiment of the utility model; Those having ordinary skill in the art will appreciate that: under the situation of principle that does not break away from the utility model and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, the scope of the utility model is limited claim and equivalent thereof.
Claims (4)
1. a spacing unit switch is characterized in that, comprising:
Casing;
Be installed in the relay in the said casing, said relay links to each other with power supply;
Be installed at least one electromagnetic proximity switch in the said casing, said at least one electromagnetic proximity switch detects carrying a row steel cable, when said at least one electromagnetic proximity switch detect steel cable near the time, said relay breaks off said power supply.
2. spacing unit switch as claimed in claim 1 is characterized in that, said electromagnetic proximity switch is two.
3. spacing unit switch as claimed in claim 2 is characterized in that, said two electromagnetic proximity switch are parallel with one another, and all links to each other with said relay.
4. spacing unit switch as claimed in claim 1 is characterized in that, said spacing unit switch is installed on the corresponding support of the major and minor hook rope drum of lifting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203550486U CN202261218U (en) | 2011-09-20 | 2011-09-20 | Limit combination switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203550486U CN202261218U (en) | 2011-09-20 | 2011-09-20 | Limit combination switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202261218U true CN202261218U (en) | 2012-05-30 |
Family
ID=46122397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203550486U Expired - Fee Related CN202261218U (en) | 2011-09-20 | 2011-09-20 | Limit combination switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202261218U (en) |
-
2011
- 2011-09-20 CN CN2011203550486U patent/CN202261218U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102674108B (en) | Electronic control brake device for elevator cage | |
| CN205617869U (en) | Lifting and horizontal moving formula stereo garage safety hook | |
| CN104401836A (en) | Speed limiter for triggering elevator safe execution mechanism or device | |
| CN103693538B (en) | Intelligent pneumatic landing door system | |
| CN204022188U (en) | A kind of device preventing the abnormal movement of lift car | |
| CN101096252A (en) | Control device for elevator up-running over-speed protection and control method | |
| CN201193171Y (en) | Elevator layer door abnormal opening detection device | |
| CN208869110U (en) | A kind of accidental movement of elevator cage detection circuit | |
| CN201694751U (en) | Crane crampon up limit control alarm device | |
| CN201002902Y (en) | Control device used for elevator overspeed protective device | |
| CN202261218U (en) | Limit combination switch | |
| CN204057541U (en) | A kind of detection alarm device of skip bucket pothook | |
| CN107416636B (en) | Elevator car unexpected movement and up overspeed protection control panel | |
| CN201801163U (en) | Carryover device provided with magnetic switches | |
| CN203319442U (en) | Rope breakage protection device of construction lift | |
| CN207142554U (en) | Accidental movement of elevator cage and up-running over-speed protection control panel | |
| CN202175406U (en) | Work-piece transmission system | |
| CN102320533A (en) | Dual-loop controlled over winding warning and limiting device | |
| CN102336364B (en) | Pressure-adjusting and speed-adjusting device controlled by multiple linkage brake | |
| CN203794390U (en) | Speed governor for triggering elevator safety executing mechanism or device | |
| CN203582221U (en) | Car accidental movement protective device | |
| CN202379613U (en) | Lifting mechanism of gate crane and bridge crane | |
| CN103738817B (en) | Elevator traction safety protection system and method | |
| CN208200070U (en) | It is a kind of with gyroscope without guide rail electromagnetic type elevator | |
| CN201296607Y (en) | Device for preventing travelling crane steel wire rope from jumping from slot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20150920 |
|
| EXPY | Termination of patent right or utility model |