CN106325319A - Safety protection system of downward belt conveyor - Google Patents
Safety protection system of downward belt conveyor Download PDFInfo
- Publication number
- CN106325319A CN106325319A CN201610940062.XA CN201610940062A CN106325319A CN 106325319 A CN106325319 A CN 106325319A CN 201610940062 A CN201610940062 A CN 201610940062A CN 106325319 A CN106325319 A CN 106325319A
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- Prior art keywords
- relay
- speed
- normally
- speed switch
- input channel
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D13/62—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Conveyors (AREA)
Abstract
The invention provides a safety protection system of a downward belt conveyor, comprising a speed switch, a safety relay and a DC power, wherein the monitoring device of the speed switch detects the belt speed of the conveyor; when the belt speed is greater than the preset speed threshold value, the normally-closed contact of the speed switch is controlled to be opened, and then the signal input loop composed of the normally-close contacts of the DC power and speed switch and the coils of the relay is disconnected; the coil of the relay is in power failure; the normally-opened contact of the relay is disconnected; the normally-opened contact of the safety relay is disconnected, so the auxiliary contact loop of the brake pump motor is disconnected; the brake pump motor stops working; the conversion valve loop is disconnected; the reversing valve is reversed to one-circuit oil circuit of an overflow valve and a speed regulating valve, and then band-type brake action is realized, and the belt stops moving. After the downward belt conveyor is in power failure, the speed switch detects great belt speed, and the hydraulic brake system sends the signal to realize band-type brake and avoid flying phenomenon.
Description
Technical field
The present invention relates to ribbon conveyer technical field, more particularly, it relates to the safety of a kind of downward belt conveyor
Protection system.
Background technology
Ribbon conveyer is one of the most capable contemporary conveying equipment, and in whole conveyer category, it is to apply
For a kind of equipment widely, the most extensive industry such as application and metallurgy, mine, cement, harbour, chemical industry, grain.Belt is defeated
Machine is sent to be divided into upper fortune and lower fortune according to the transporting direction of transported material material.The conventional safety due to upper conveying belt type conveyer is relatively
Height, therefore its application is the most more.Along with the ribbon conveyer application in loose unpacked material transportation system field and development, long away from
Transporting mode of movement under being often difficult to avoid in the design of, large conveying quantity transportation system, downward belt conveyor is when generator operation, also
Bigger economic benefit can be had to grid power transmission.But, downward belt conveyor is after there is disconnection fault, due to material
Mechanical energy the biggest, it may appear that accelerate descending generation driving phenomenon.
Summary of the invention
In view of this, the present invention proposes the safety system of a kind of downward belt conveyor, is intended to solve lower conveying belt type defeated
Send machine after disconnection fault occurs, owing to the mechanical energy of material is very big, occur accelerating descending technical problem.
In order to solve above-mentioned technical problem, it is proposed that scheme as follows:
The safety system of a kind of downward belt conveyor, including: speed switch, relay, safety relay and straight
Stream power supply, wherein,
The coils connected in series composition signal input of described DC source, the normally-closed contact of described speed switch and described relay
Loop；
The input channel of described safety relay is connected with the normally opened contact of described relay, described safety relay straight
Stream power supply input channel be connected with described DC source, the normally opened contact passage of described safety relay be connected on respectively described under
The switching valve loop of the brake hydraulic system of conveying belt type conveyer and the auxiliary contact loop of brake pump motor catalyst；
The monitoring device of described speed switch monitors the belt speed of described downward belt conveyor, when described belt speed
During more than the threshold speed preset, control described normally-closed contact and open.
Preferably, described speed switch is: magnetic-type speed switch.
Preferably, described magnetic-type speed switch is: ESRW type magnetic-type speed switch.
Preferably, described safety relay includes two described input channels.
Preferably, the input channel of described safety relay is connected particularly as follows: described with the normally opened contact of described relay
One described input channel of safety relay is connected with the first normally opened contact of described relay, described safety relay another
One described input channel is connected with the second normally opened contact of described relay.
Preferably, described safety relay includes a described input channel.
Preferably, the input channel of described safety relay is connected particularly as follows: described with the normally opened contact of described relay
The described input channel of safety relay is connected with the first normally opened contact of described relay.
Preferably, described DC source is 24V.
Preferably, described system also includes: the switch in parallel with described normally-closed contact.
Compared with prior art, technical scheme has the advantage that
The safety system of the downward belt conveyor that technique scheme provides, including speed switch, relay peace
All relay and DC source, wherein, the belt speed of the monitoring device detection conveyer of speed switch, when belt speed is more than
Preset threshold speed time, control speed switch normally-closed contact open, and then the normally-closed contact of DC source, speed switch and
The signal input circuit of the coil composition of relay disconnects, the coil blackout of relay, and the normally opened contact of relay disconnects, safety
The normally opened contact passage of relay disconnects, and therefore, the auxiliary contact loop of brake pump motor catalyst disconnects, and brake pump motor stops
Only work, switching valve loop disconnects, and reversal valve is changed to overflow valve and flow speed control valve one tunnel oil return, and then realized band-type brake action, belt
Stop mobile.I.e. downward belt conveyor is after there is disconnection fault, and speed switch detects that belt speed is excessive to hydraulic pressure system
Dynamic system sends signal, it is achieved band-type brake, it is to avoid driving phenomenon occurs.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
The structural representation of the safety system of a kind of downward belt conveyor that Fig. 1 provides for the embodiment of the present invention；
The structural representation of the safety system of the another kind of downward belt conveyor that Fig. 2 provides for the embodiment of the present invention
Figure；
The operation principle schematic diagram of a kind of speed switch that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment one
Present embodiments provide the safety system of a kind of downward belt conveyor, refering to Fig. 1, it is shown that its structure is shown
It is intended to, including: speed switch, relay, safety relay and DC source U, wherein,
The coil K1 of described DC source U, the normally-closed contact 11 of described speed switch and described relay is composed in series letter
Number input circuit；
The input channel of described safety relay is connected with the normally opened contact K2 of described relay, described safety relay
DC supply input passage is connected with described DC source U, and the normally opened contact passage of described safety relay is connected on institute respectively
The auxiliary contact in the switching valve loop and brake pump motor catalyst of stating the brake hydraulic system of downward belt conveyor return
Road；
The monitoring device 12 of described speed switch monitors the belt speed of described downward belt conveyor, when described belt speed
When degree is more than the threshold speed preset, controls described normally-closed contact 11 and open.
Seeing Fig. 1, the DC supply input passage of safety relay is made up of binding post A1 and binding post A2, connects straight
Stream power supply U, concrete, DC source U is 24V.Safety relay includes an input channel, and input channel is by binding post
S11 and binding post S12 is constituted, and the indirect input signal of S11 and S12 i.e. connects the normally opened contact K2 of relay.Safety relay
The hand-reset passage of device is made up of binding post S34 and S12, connects SR L1 between S34 and S12.Safety relay
Normally opened contact passage be made up of binding post 13 and binding post 14, binding post 13 and binding post 14 are connected on brake
The switching valve loop of hydraulic system, and also it is connected on the auxiliary contact loop of brake pump motor catalyst, control two simultaneously and return
The break-make on road, it is achieved band-type brake, it is to avoid driving phenomenon occurs.
The safety system of the downward belt conveyor that the present embodiment provides, the monitoring device 12 of speed switch detects defeated
Sending the belt speed of machine, when belt speed is more than the threshold speed preset, the normally-closed contact 11 controlling speed switch is opened, and enters
And the signal input circuit of the coil K1 composition of the normally-closed contact 11 of DC source U, speed switch and relay disconnects, relay
Coil K1 power-off, the normally opened contact K2 of relay disconnects, and the normally opened contact passage of safety relay disconnects, therefore, brake pump
The auxiliary contact loop of motor catalyst disconnects, and brake pump motor quits work, and switching valve loop disconnects, and overflow changed to by reversal valve
Valve and flow speed control valve one tunnel oil return, and then realize band-type brake action, belt stops mobile.Is there is power-off event in i.e. downward belt conveyor
After barrier, speed switch detects that belt speed is excessive and sends signal to brake fluid system, it is achieved band-type brake, it is to avoid occur driving existing
As.
Embodiment two
The present embodiment provides the safety system of another kind of downward belt conveyor, sees Fig. 2, it is shown that this system
Structural representation, wherein, safety relay is that dual pathways safety relay, i.e. safety relay include two input channels, its
In, an input channel is made up of binding post S11 and binding post S12, the normally opened contact of contact relay between S11 and S12
K2；Another input channel is made up of binding post S21 and binding post S22, and between S21 and S22, the normally opened of contact relay touches
Point K3；The normally opened contact passage of safety relay also includes two, and a normally opened contact passage is by binding post 13 and terminals
Son 14 is constituted, and binding post 13 and binding post 14 are connected on the switching valve loop of brake hydraulic system；Another is normally opened tactile
Point passage is made up of binding post 33 and binding post 34, and binding post 33 is connected on brake pump motor with binding post 34 and contacts
The auxiliary contact loop of device.By the action of the two of relay normally opened contacts (K2 and K3), and then control two loops simultaneously
Break-make, it is achieved band-type brake, it is to avoid occur driving phenomenon.
Speed switch can be magnetic-type speed switch, shown in Figure 3, the contact wheel of magnetic-type contact switch 51 with under
The belt 61 of conveying belt type conveyer contacts.When belt 61 moves, contact wheel 51 rotates, and then the prolongation being connected with contact wheel 51
Axle 52 rotates, and when the rotary speed of extending shaft 52 is more than the value preset, normally-closed contact 11 is opened；Rotation speed when extending shaft 52
When degree is not more than the value preset, normally-closed contact 11 is closure state.Concrete magnetic-type speed switch is ESRW type magnetic-type speed
Degree switch.
Forbidden to cause mistakenly stop machine for preventing speed switch 1 from testing the speed, it is also possible to arrange the normally-closed contact 11 with speed switch 1 also
The switch of connection, for shielding the effect of speed switch 1 when speed switch 1 breaks down.
In this article, the relational terms of such as first and second or the like is used merely to an entity and another entity
Make a distinction, and not necessarily require or imply relation or the order that there is any this reality between these entities.And,
Term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include a series of
The article of key element or equipment not only include those key elements, but also include other key elements being not expressly set out, or also
Including the key element intrinsic for this article or equipment.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (9)
1. the safety system of a downward belt conveyor, it is characterised in that including: speed switch, relay, safety continue
Electrical equipment and DC source, wherein,
The coils connected in series composition signal of described DC source, the normally-closed contact of described speed switch and described relay inputs back
Road；
The input channel of described safety relay is connected with the normally opened contact of described relay, the unidirectional current of described safety relay
Source input channel is connected with described DC source, and the normally opened contact passage of described safety relay is connected on described lower fortune band respectively
The switching valve loop of the brake hydraulic system of formula conveyer and the auxiliary contact loop of brake pump motor catalyst；
The monitoring device of described speed switch monitors the belt speed of described downward belt conveyor, when described belt speed is more than
During the threshold speed preset, control described normally-closed contact and open.
System the most according to claim 1, it is characterised in that described speed switch is: magnetic-type speed switch.
System the most according to claim 2, it is characterised in that described magnetic-type speed switch is: ESRW type magnetic-type speed
Degree switch.
System the most according to claim 1, it is characterised in that described safety relay includes two described input channels.
System the most according to claim 4, it is characterised in that the input channel of described safety relay and described relay
Normally opened contact connect particularly as follows: first normally opened the touching of a described input channel and described relay of described safety relay
Point connects, and another described input channel of described safety relay is connected with the second normally opened contact of described relay.
System the most according to claim 1, it is characterised in that described safety relay includes a described input channel.
System the most according to claim 6, it is characterised in that the input channel of described safety relay and described relay
Normally opened contact connect particularly as follows: described safety relay described input channel and described relay the first normally opened contact even
Connect.
System the most according to claim 1, it is characterised in that described DC source is 24V.
System the most according to claim 1, it is characterised in that described system also includes: in parallel with described normally-closed contact
Switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610940062.XA CN106325319B (en) | 2016-10-25 | 2016-10-25 | Safety protection system of downward belt conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610940062.XA CN106325319B (en) | 2016-10-25 | 2016-10-25 | Safety protection system of downward belt conveyor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106325319A true CN106325319A (en) | 2017-01-11 |
| CN106325319B CN106325319B (en) | 2020-02-28 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610940062.XA Active CN106325319B (en) | 2016-10-25 | 2016-10-25 | Safety protection system of downward belt conveyor |
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Citations (4)
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|---|---|---|---|---|
| CN1038257A (en) * | 1988-05-31 | 1989-12-27 | 牡丹江市环境科学研究所 | Small Sewage Treatment Equipment and technology thereof |
| CN201746079U (en) * | 2010-08-20 | 2011-02-16 | 芜湖思博机电设备有限公司 | Drive mechanism protection device |
| CN104590823A (en) * | 2014-11-27 | 2015-05-06 | 中国矿业大学 | Disc -shaped braking system for downwards transportation belt type conveyor |
| CN105947596A (en) * | 2016-06-20 | 2016-09-21 | 西安科技大学 | Anti-runaway protection system and method for downward belt conveyor |
-
2016
- 2016-10-25 CN CN201610940062.XA patent/CN106325319B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038257A (en) * | 1988-05-31 | 1989-12-27 | 牡丹江市环境科学研究所 | Small Sewage Treatment Equipment and technology thereof |
| CN201746079U (en) * | 2010-08-20 | 2011-02-16 | 芜湖思博机电设备有限公司 | Drive mechanism protection device |
| CN104590823A (en) * | 2014-11-27 | 2015-05-06 | 中国矿业大学 | Disc -shaped braking system for downwards transportation belt type conveyor |
| CN105947596A (en) * | 2016-06-20 | 2016-09-21 | 西安科技大学 | Anti-runaway protection system and method for downward belt conveyor |
Non-Patent Citations (4)
| Title |
|---|
| 刘国鹏: "基于安全继电器的悬臂式掘进机安全控制***", 《装备制造技术》 * |
| 徐景德: "《煤矿安全生产管理人员安全培训教材》", 30 November 2004, 中国矿业大学出版社 * |
| 钱伟: "带式输送机驱动技术及电控***的变频改造", 《煤矿机电》 * |
| 龚仲华: "《数控机床电气设计典例》", 31 December 2014, 机械工业出版社 * |
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