CN102116644A - Method and device for detecting opening of brake - Google Patents
Method and device for detecting opening of brake Download PDFInfo
- Publication number
- CN102116644A CN102116644A CN2009102158521A CN200910215852A CN102116644A CN 102116644 A CN102116644 A CN 102116644A CN 2009102158521 A CN2009102158521 A CN 2009102158521A CN 200910215852 A CN200910215852 A CN 200910215852A CN 102116644 A CN102116644 A CN 102116644A
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- China
- Prior art keywords
- detent
- switch
- near switch
- push rod
- main body
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- Pending
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000006698 induction Effects 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 238000013213 extrapolation Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 206010001541 Akinesia Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention provides a method and a device for detecting opening of a brake. The method comprises the following steps of: extending a telescopic brake push rod out of a main body of a brake motor, wherein the tail end of the brake push rod is provided with an inductive metal sheet, and a proximity switch is fixed on the main body of the brake motor; pushing the brake push rod outwards from the main body of the brake motor when the brake is opened, wherein the inductive metal sheet at the tail end of the brake push rod is close to the proximity switch; and sending out a brake opening signal when the distance between the inductive metal sheet and the proximity switch is less than or equal to induction distance of the proximity switch. The method and the device for detecting the opening of the brake have the advantages of no mechanical wear, high flexibility, reliable action, high repeated positioning accuracy, high operating frequency, vibration resistance, water resistance and longer life.
Description
Technical field
The present invention relates to a kind of detent and open detection method and device, more specifically, relate to a kind of employing and open detection method and device near the detent of switch.
Background technology
On the drive unit of belt feeder, all have and detect the mechanical limit switch that detent is opened.When detent is opened to assigned address, under the effect of mechanical force bump, make limit switch send the ON Action signal, and (for example programmable logic controller (PLC) PLC) is finished needed action control to be transferred to controller.
Yet there are a lot of defectives in mechanical limit switch.For example, because mechanical force makes mechanism's frangibility and wearing and tearing to the bump of switch, and contact bears very high self-induced e.m.f and produces arc light and make the contact premature burnout when disconnecting, so the life-span of limit switch is shorter, causes the spare parts consumption amount of switch very big.
Secondly,, can not reset after causing limit switch akinesia or action, can cause extremely dangerous situation if switch motion is malfunctioning.Cause the reason of this situation to have three kinds: (1) limit switch contact adhesion, cause opening signal often to have; (2) owing to corrosion, coal dust gather and cause the limit switch mechanical part dumb, cause switch not reset; (3) in the sleety weather in the winter time, the limit switch mechanical part freezes, and causes switch not reset.If detent breaks down and cuts out just at this moment, but controller is received the detent opening signal always, and then equipment can move as usual, so just causes the situation of detent band-type brake operation.Though the band-type brake operation can increase the load of motor, the increase deficiency of this load is so that the protection system action of motor.Like this, in a short period of time, detent will produce very high temperature, and high temperature is delivered to motor and reductor, directly causes oil sealing to damage.If find untimelyly, the coal dust breaking out of fire thereby high temperature can ignite causes serious consequence.
Once more, the inspection of mechanical limit switch is very difficult.Owing to do not show intuitively, the spot check personnel are difficult to find the internal fault of limit switch, and whether the action of limit switch has been difficult to a quantitative standards flexibly, have increased the difficulty of spot check.
Summary of the invention
The present invention opens detection method and device by a kind of detent is provided, and has overcome above-mentioned defective of the prior art.
The invention provides a kind of detent and open detection method, comprising:
Extend a telescopic brake push rod from the main body of detent motor, the brake push rod end is provided with induction metal plate, is fixed in the main body of detent motor near switch;
When described detent was opened, to extrapolation, the induction metal plate of brake push rod end was close gradually near switch from detent motor main body for brake push rod;
When being less than or equal to distance of reaction near switch, send the detent opening signal when induction metal plate and near the distance between the switch.
Preferably, when described detent cut out, brake push rod was to retraction, and induction metal plate is gradually away near switch; When induction metal plate and near the distance between the switch greater than near the distance of reaction of switch the time, send the detent shutdown signal near switch.
Preferably, described induction metal plate is the induction iron plate.
Preferably, by near switch bracket with the described main body that is fixed to the detent motor near switch.
Preferably, describedly comprise mutually angled first sections and second sections near switch bracket, first sections is connected and fixed on the main body of detent motor by bolt, holds in second sections and fixing described near switch.
The present invention also provides a kind of detent opening detecting device, comprising:
Near switch;
The detent motor, this detent motor comprises:
Detent motor main body describedly is fixed in this detent motor main body near switch;
From the extended telescopic brake push rod of described detent motor main body;
Be in the induction metal plate of the end of brake push rod,
When described detent motor was opened, to extrapolation, the induction metal plate of brake push rod end was close gradually near switch from detent motor main body for brake push rod;
When reaching distance of reaction near switch, send the detent opening signal when induction metal plate and near the distance between the switch.
Detent provided by the invention is opened detection method and device, does not have that machinery wearing and tearing, highly sensitive, reliable in action, repetitive positioning accuracy height, operating frequency are fast, vibration resistance, waterproof and life-span be longer.
Description of drawings
Fig. 1,2,3 illustrates and is used for and will be installed near switch apart from the switch bracket of controlled plant specified distance; Wherein, Fig. 1 shows the cut-away view near first sections of switch bracket, and Fig. 2 shows the cut-away view near second sections of switch bracket, and Fig. 3 illustrates the side view of switch bracket;
Fig. 4 illustrates controlled plant, near switch bracket, near the scheme of installation of the combination of switch;
Fig. 5 illustrates the synoptic diagram that signal wire is taken back controller near switch is subjected to industrial alternating voltage control;
Fig. 6 illustrates and uses the process flow diagram that starts the whole process of peripherals near switch of the present invention.
Embodiment
Hereinafter, identical Reference numeral refers to components identical.
Different with the controlled plant of prior art employing mechanical limit switch direct mechanical contact such as detent is, the present invention adopts and near switch controlled plant is controlled, directly do not contact controlled plant near switch, but separating certain distance of reaction with controlled plant, this distance of reaction is preferably 25 millimeters.Have very wide accommodation according to of the present invention near switch, carrying load ability is very strong.Described accommodation is preferably: alternating voltage 20-250 volt, alternating current 3-400 milliampere; DC voltage 10-300 volt, DC current 3-300 milliampere.
Generally, the using method near switch of the present invention can be, when being close to certain distance (for example distance of reaction) near switch and object to be detected, do not need contact just can send switch motion or high-low level signal.Should can be a kind of sensor that metal has or not that in certain distance, detects near switch, and can directly drive load (for example, contactor, solenoid valve, relay and programmable logic controller (PLC) (PLC)).
Can will be installed in apart from the controlled plant specified distance near switch by specific device, keep certain distance of reaction so that make near switch and controlled plant.According to the present invention, adopt one will be installed on apart from controlled plant (for example detent) specified distance near switch near switch bracket.
Fig. 1,2,3 illustrate be used for be installed near switch apart from the controlled plant specified distance near switch bracket 100.Fig. 3 shows the side view near switch bracket 100.As shown in Figure 3, first sections 101 and second sections 102 that comprise each other at an angle (preferred 90 degree) near switch bracket 100.Fig. 1 shows the cut-away view of first sections 101.Fig. 2 shows the cut-away view of second sections 102.
Can have a plurality of bolt hole 101a in first sections 101.As shown in Figure 1, leave two bolt hole 101a in first sections 101, and described bolt hole 101a presents the shape of strip hole, this strip hole is preferred wide 4 millimeters, long 100 millimeters.Pierce in the controlled plant by bolt being passed corresponding bolts hole 101a, just can be with support 100 overall fixed in controlled plant.
Fig. 4 illustrates controlled plant, near switch bracket, near the scheme of installation of the combination of switch.Wherein, the controlled plant among Fig. 4 embodiment is a detent motor 404.
As shown in Figure 4, hold near switch 401 and be fixed in second sections 102 near switch bracket 100.Be fixed in the support mounting seat 405 of detent motor near first sections 101 of switch bracket 100.By above-mentioned mounting structure, can make near switch 401, near keeping relatively-stationary relation between switch bracket 100, the detent motor 404.
Brake push rod 403 is stretched out from detent motor 404, and extension elongation is adjustable.Induction metal plate (for example being the induction iron plate) 402 places the end that stretches out of brake push rod 403.Therefore, by stretching of brake push rod 403, induction metal plate 402 is with respect to the adjustable positions of detent motor 404 main bodys.Induction metal plate 402 near be fixedly mounted near on the switch bracket 100 near switch 401.Therefore, because induction metal plate 402 is adjustable with respect to the distance of detent motor 404 main bodys, induction metal plate 402 also can be adjusted by the flexible of brake push rod 403 with respect to the distance near switch 401.
When detent motor 404 is opened, brake push rod 403 is protruding, thereby make induction metal plate 402 close gradually near switch 401, when reaching distance of reaction near switch 401 when induction metal plate 402 and near the distance between the switch 401, just send switch actuating signals near switch 401, and then send the detent opening signal.
When detent motor 404 cuts out, brake push rod 403 is inwardly withdrawn, thereby make induction metal plate 402 gradually away near switch 401, when exceeding distance of reaction near switch 401 when induction metal plate 402 and near the distance between the switch 401, just can not be responded near switch 401, thereby be sent the detent shutdown signal.
Fig. 5 illustrates the synoptic diagram that signal wire is taken back controller near switch is subjected to industrial alternating voltage control.As indicated above, this voltage adaptation wide range near switch, carrying load ability is very strong, and can not produce self-induction electromotive force, so industrial control alternating voltage can directly be received near switch for 110 volts, signal wire takes back programmable logic controller (PLC) (PLC), and does not need to use auxiliary reclay to isolate.In addition, preferably,, connect formula into Chang Kaifang near switch for security consideration.
Fig. 6 illustrates and uses the process flow diagram that starts the whole process of peripherals near switch of the present invention.As shown in Figure 6, in step 601, at first system sends the instruction that starts peripherals (for example belt feeder), enters step 602 thereupon.In step 602, the warning horn jingle bell reaches the certain hour section, for example 30 seconds, reminds personnel along the line to take care.Then, in step 603, send the instruction of opening detent.Subsequently, in step 604, if detent is opened, then brake push rod is stretched out, when brake push rod near near switch and when making the two distance reach distance of reaction near switch, send the detent opening signal, enter step 605 thus, start the belt feeder drive motor.If in step 604, in certain hour section (for example 3 seconds), do not send the detent opening signal, this just shows near switch and does not start that enter step 606 this moment, carries out fault handling in step 606.
In sum, of the present invention near switch, advantages such as having and do not have the machinery wearing and tearing, highly sensitive, reliable in action, repetitive positioning accuracy height, operating frequency are fast, vibration resistance, waterproof and life-span are long can directly replace mechanical limit switch of the prior art.
It will be appreciated by persons skilled in the art that the present invention is not limited to embodiment mentioned above.The technical scheme that all and the foregoing description are equal to all drops in protection scope of the present invention.
Claims (10)
1. a detent is opened detection method, it is characterized in that:
Extend a telescopic brake push rod (403) from the main body of detent motor (404), brake push rod (403) end is provided with induction metal plate (402), is fixed in the main body of detent motor (404) near switch (401);
When described detent was opened, to extrapolation, the induction metal plate (402) of brake push rod (403) end was near described near switch (401) from detent motor (404) main body for brake push rod (403);
When being less than or equal to distance of reaction near switch (401), send the detent opening signal when induction metal plate (402) and near the distance between the switch (401).
2. method according to claim 1 is characterized in that, when described detent cut out, brake push rod (403) was to retraction, and induction metal plate (402) is away near switch (401); When induction metal plate (402) and near the distance between the switch (401) greater than near the distance of reaction of switch (401) time, send the detent shutdown signal near switch (401).
3. method according to claim 1 and 2 is characterized in that, described induction metal plate is the induction iron plate.
4. method according to claim 1 is characterized in that, by near switch bracket (100) with the described main body that is fixed to detent motor (404) near switch (401).
5. method according to claim 4, it is characterized in that, describedly comprise mutually angled first sections (101) and second sections (102) near switch bracket (100), first sections (101) is connected and fixed on the main body of detent motor (404) by bolt, holds in second sections (102) and fixing described near switch (401).
6. a detent opening detecting device is characterized in that, comprising:
Near switch (401);
Detent motor (404), this detent motor (404) comprising:
Detent motor main body describedly is fixed in this detent motor main body near switch (401);
From the described extended telescopic brake push rod of detent motor main body (403);
Be in the induction metal plate (402) of the end of brake push rod (403), wherein,
When described detent motor was opened, to extrapolation, the induction metal plate (402) of brake push rod (403) end was close gradually near switch (401) from detent motor (404) main body for brake push rod (403);
When reaching distance of reaction near switch (401), send the detent opening signal when induction metal plate (402) and near the distance between the switch (401).
7. device according to claim 6 is characterized in that, when described detent cut out, brake push rod (403) was to retraction, and induction metal plate (402) is gradually away near switch (401); When surpassing distance of reaction near switch (401), send the detent shutdown signal near switch when induction metal plate (402) and near the distance between the switch (401).
8. according to claim 6 or 7 described devices, it is characterized in that described induction metal plate is the induction iron plate.
9. device according to claim 6 is characterized in that, described near switch (401) by be fixed to the main body of detent motor (404) near switch bracket (100).
10. device according to claim 6, it is characterized in that, describedly comprise mutually angled first sections (101) and second sections (102) near switch bracket (100), first sections (101) is connected and fixed on the main body of detent motor (404) by bolt, holds in second sections (102) and fixing described near switch (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102158521A CN102116644A (en) | 2009-12-30 | 2009-12-30 | Method and device for detecting opening of brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102158521A CN102116644A (en) | 2009-12-30 | 2009-12-30 | Method and device for detecting opening of brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102116644A true CN102116644A (en) | 2011-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102158521A Pending CN102116644A (en) | 2009-12-30 | 2009-12-30 | Method and device for detecting opening of brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102116644A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395606A (en) * | 2013-08-14 | 2013-11-20 | 济钢集团有限公司 | Detection device for on-off state of brake |
-
2009
- 2009-12-30 CN CN2009102158521A patent/CN102116644A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395606A (en) * | 2013-08-14 | 2013-11-20 | 济钢集团有限公司 | Detection device for on-off state of brake |
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Application publication date: 20110706 |