CN211103459U - Safety protection system of grinding machine - Google Patents
Safety protection system of grinding machine Download PDFInfo
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- CN211103459U CN211103459U CN201921859634.7U CN201921859634U CN211103459U CN 211103459 U CN211103459 U CN 211103459U CN 201921859634 U CN201921859634 U CN 201921859634U CN 211103459 U CN211103459 U CN 211103459U
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- grinding machine
- alarm
- grinder
- controller
- safety protection
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
The utility model provides a grinding machine safety protection system, including P L C controller, photoelectric sensor, circuit breaker, relay, alarm, photoelectric sensor is connected with the input of P L C controller, circuit breaker, relay, alarm are connected with the output of P L C controller, photoelectric sensor, alarm are prepared a plurality of respectively on every grinding machine, the utility model discloses a photoelectric sensor's monitoring is in time corrected the habitual unsafe operating behavior of grinding machine in operation process and is taken necessary outage means to carry out safety protection to the operator.
Description
Technical Field
The utility model relates to a grinder safety protection system.
Background
The safety operating rules of the grinder are specified as follows: an operator should stand on the side surface of the grinder, and the operator is strictly prohibited to stand on the front side; it is strictly forbidden for two people to use one grinder at the same time. Many operators are prone to habitually unsafe operation behaviors of standing on the front side of the grinder or using one grinder by two persons at the same time in the actual operation process of the grinder. At present, firstly, there is no suitable mature equipment on the market for safety protection against this habitual unsafe behaviour that is easy for the grinder operator to produce. Secondly, in order to correct the habitual unsafe operation behavior of an operator in the operation process of the grinding machine, a part of safety standardized standard-reaching enterprises which highly pay attention to safe production adopt that a stepping type protective isolation cover is additionally arranged on the grinding machine body, and adopt that the mechanical movement of the isolation cover is controlled in a stepping mode through an electronic control technology so as to achieve the purpose of isolating the grinding wheel from a grinding part. The mode has the advantages that the single grinding machine is high in modification cost and long in period, and is not suitable for popularization, if a plurality of grinding machines are modified simultaneously, the modification cost is further improved, and meanwhile, certain potential safety hazards still exist in the modification; secondly, because the working environment of the grinder is relatively severe, the reliability of the electronic product cannot absolutely meet the requirement for safety protection.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a grinding machine safety protection system.
The utility model discloses a following technical scheme can realize.
The utility model provides a pair of abrasive machine safety protection system, including P L C controller, photoelectric sensor, circuit breaker, relay, alarm, photoelectric sensor is connected with the input of P L C controller, circuit breaker, relay, alarm are connected with the output of P L C controller, photoelectric sensor, alarm are prepared a plurality of respectively on every abrasive machine.
The quantity of the photoelectric sensors and the quantity of the alarm prepared on each grinding machine are respectively 4 and 2, wherein two photoelectric sensors are respectively arranged right above two grinding wheels of the grinding machine, one alarm is respectively arranged above the two photoelectric sensors, and the other two photoelectric sensors are arranged right in front of the center of the grinding machine in the middle detection direction of the grinding machine.
Every 7 input terminals of the P L C controller are in one group, each group of input terminals is connected with 3 switches and 4 photoelectric sensors, one end of each 4 photoelectric sensor is connected with the terminal of the P L C, the other end of each 4 photoelectric sensor is connected with the power supply end of the P L C controller, each 3 switches is respectively 1 knob switch and 2 button switches, one end of each switch is connected with the terminal of the P L C, and the other end of each switch is connected with the COM end of the P L C.
A public end and 3 signal ends of the output end of the P L C controller are in a group, the public end is connected with a fuse and then connected with a fire wire pole of a grinder power supply, the signal ends are respectively connected with two alarms and a relay, the other ends of the two alarms and the relay are connected with a zero wire pole of the grinder, and the P L C controller and the grinder use the same power supply.
The contacts of the relay are installed in branch power lines of each grinder.
The alarm is an audible and visual alarm.
The circuit breaker is installed on the grinder power bus.
The beneficial effects of the utility model reside in that: through the monitoring of the photoelectric sensor, habitual unsafe operation behaviors of the grinder in the operation process are corrected in time, and necessary power-off shutdown measures are adopted to carry out safety protection on operators.
Drawings
Fig. 1 is a schematic wiring diagram of P L C of the present invention;
FIG. 2 is a schematic diagram of a power supply circuit of the grinder of the present invention;
fig. 3 to 6 are control program schematic diagrams of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
A safety protection system for grinding machines comprises a P L C controller, a photoelectric sensor, a circuit breaker, a relay and an alarm, wherein the photoelectric sensor is connected with the input end of the P L C controller, the circuit breaker, the relay and the alarm are connected with the output end of the P L C controller, and a plurality of photoelectric sensors and alarms are respectively arranged on each grinding machine.
The quantity of the photoelectric sensors and the quantity of the alarm prepared on each grinding machine are respectively 4 and 2, wherein two photoelectric sensors are respectively arranged right above two grinding wheels of the grinding machine, one alarm is respectively arranged above the two photoelectric sensors, and the other two photoelectric sensors are arranged right in front of the center of the grinding machine in the middle detection direction of the grinding machine.
Every 7 input terminals of the P L C controller are in one group, each group of input terminals is connected with 3 switches and 4 photoelectric sensors, one end of each 4 photoelectric sensor is connected with the terminal of the P L C, the other end of each 4 photoelectric sensor is connected with the power supply end of the P L C controller, each 3 switches is respectively 1 knob switch and 2 button switches, one end of each switch is connected with the terminal of the P L C, and the other end of each switch is connected with the COM end of the P L C.
A public end and 3 signal ends of the output end of the P L C controller are in a group, the public end is connected with a fuse and then connected with a fire wire pole of a grinder power supply, the signal ends are respectively connected with two alarms and a relay, the other ends of the two alarms and the relay are connected with a zero wire pole of the grinder, and the P L C controller and the grinder use the same power supply.
The contacts of the relay are installed in branch power lines of each grinder.
The alarm is an audible and visual alarm.
The circuit breaker is installed on the grinder power bus.
Example (b): taking the habitual violation operation behavior of a single grinding machine in the operation process as an example, the habitual violation operation behavior of the single grinding machine in the operation process is monitored by adopting 4 photoelectric sensors which are all arranged on the wall of an XZ axis projection plane on the front surface of the grinding machine, wherein 2 sensors (No. 1 and No. 2) are arranged on the wall 30-50 mm above the tangent line of the highest point of the horizontal height of the two grinding wheel protective covers and are used for detecting a human body standing on the front surface of the grinding machine; the other 2 sensors (No. 3 and No. 4) are arranged on the inner sides with the same height as the No. 1 and No. 2 sensors and are used for detecting the human body standing on the side surface of the grinder. The distribution box is arranged at a position determined by specific working environment and has no special requirement. The method comprises the following specific operation steps:
the equipment has two states of automatic alert control and prompt alarm alert control:
1. automatic alert control state: the grinder is in an automatic safety protection warning state. Once the operator generates habitual unsafe behaviors, the human body is in an unsafe environment, an alarm (false alarm generated when non-operators mistakenly pass through an alarm area is prevented) is given after 3S (adjustable), and after 7S, if the habitual unsafe operation behaviors are not corrected, the grinder is automatically powered off. The specific functions are as follows:
(1) when an individual human body stands on the front side of the grinder, no matter the No. 1 (or No. 2) sensor senses the human body, the alarm lamp 1 (or the alarm lamp 2) can not flicker within 3S (adjustable), and the purpose is to prevent false alarm generated when non-operators mistakenly pass through a warning area; when the time exceeds 3S, the alarm lamp 1 (or the alarm lamp 2) flickers (frequency is 1S), and when the alarm lamp continuously flickers for 7S, the grinding machine is automatically stopped.
(2) When two human bodies stand simultaneously on the side of the grinder, namely: after human body is sensed simultaneously to No. 3 and No. 4 sensor, when within 3S (adjustable), alarm lamp 1 (or alarm lamp 2) can not flash, when exceeding 3S after, alarm lamp 1 and alarm lamp 2 flash simultaneously (frequency 1S), after two alarm lamps continuously flash 7S simultaneously, grinder auto-stop.
2. Prompting an alarm warning control state: the grinding machine can not be automatically stopped only by providing a photoelectric alarm (alarm lamp alarm). Namely:
(1) when independent human body stands openly at the abrasive machine, no matter No. 1 (or No. 2) sensor senses human back, when within 3S (adjustable), alarm lamp 1 (or alarm lamp 2) can not twinkle, when exceeding 3S later time, alarm lamp 1 (or alarm lamp 2) twinkle (frequency 1S), but the abrasive machine can not auto-stop.
(2) When two human bodies stand simultaneously on the side of the grinder, namely: after human body is sensed simultaneously to No. 3 and No. 4 sensor, when within 3S (adjustable), alarm lamp 1 (or alarm lamp 2) can not flash, when exceeding 3S after, alarm lamp 1 and alarm lamp 2 flash simultaneously (frequency 1S), after two alarm lamps continuously flash 7S simultaneously, grinder auto-stop.
1. Firstly, selecting an automatic alert control state and a prompt alert control state switch to enable the equipment to be in a corresponding working state.
2. And when the starting button is pressed down, the equipment works to provide a working power supply for the grinder. This is to start the grinder start button, which makes the grinder in working condition.
If in the automatic warning control state, (1) when the habitual unsafe behavior that an individual human body stands on the front side of the grinding machine occurs, no matter the No. 1 (or No. 2) sensor senses the human body, the alarm lamp 1 (or the alarm lamp 2) can not flicker within 3S (adjustable), so that false warning generated when a non-operator mistakenly passes through a warning area is prevented; when the time exceeds 3 seconds, the unsafe state is still not eliminated, the alarm lamp 1 (or the alarm lamp 2) flickers (the frequency is 1 seconds), and when the alarm lamp continuously flickers to prompt an alarm for 7 seconds, the unsafe state is still not eliminated, and the grinding machine is automatically stopped. (2) When two human bodies stand on the side surface of the grinder at the same time, namely: after the human body is sensed simultaneously to No. 3 and No. 4 sensor, when within 3S (adjustable), alarm lamp 1 (or alarm lamp 2) can not flash, when surpassing 3S after, this kind of unsafe condition still does not eliminate, and alarm lamp 1 and alarm lamp 2 flash simultaneously (frequency 1S), after two alarm lamps continued scintillation simultaneously and indicateed the warning 7S, this kind of unsafe condition still does not eliminate, grinder auto-stop.
If the alarm warning control state is prompted, (1) when the habitual unsafe behavior that an individual human body stands on the front side of the grinding machine occurs, no matter the sensor No. 1 (or No. 2) senses the human body, the alarm lamp 1 (or the alarm lamp 2) cannot flicker within 3S (adjustable), and the purpose is to prevent false alarm generated when a non-operator mistakenly passes through a warning area; when the time exceeds 3 seconds, the unsafe state is still not eliminated, the alarm lamp 1 (or the alarm lamp 2) continuously flickers (with the frequency of 1 second), and the grinder runs all the time and cannot be automatically stopped until the unsafe state is eliminated. (2) When two human bodies stand on the side surface of the grinder at the same time, namely: after the No. 3 and No. 4 sensors sense a human body simultaneously, when the time is within 3S (adjustable), the alarm lamp 1 (or the alarm lamp 2) can not flicker, when the time exceeds 3S, the unsafe state is still not eliminated, and the alarm lamp 1 and the alarm lamp 2 continuously flicker (with the frequency of 1S) simultaneously until the unsafe state is eliminated. The grinder runs all the time and cannot be automatically stopped.
3. When the grinder is automatically stopped, the power supply of the grinder is turned off first, and then the power supply of the grinding machine is turned on to provide power supply for the grinder. Otherwise, the grinder will start directly.
Claims (7)
1. A safety protection system of a grinding machine is characterized by comprising a P L C controller, a photoelectric sensor, a circuit breaker, a relay and an alarm, wherein the photoelectric sensor is connected with the input end of the P L C controller, the circuit breaker, the relay and the alarm are connected with the output end of the P L C controller, and a plurality of photoelectric sensors and alarms are respectively arranged on each grinding machine.
2. The grinder safety protection system of claim 1, wherein: the quantity of the photoelectric sensors and the quantity of the alarm prepared on each grinding machine are respectively 4 and 2, wherein two photoelectric sensors are respectively arranged right above two grinding wheels of the grinding machine, one alarm is respectively arranged above the two photoelectric sensors, and the other two photoelectric sensors are arranged right in front of the center of the grinding machine in the middle detection direction of the grinding machine.
3. The safety protection system of the grinding machine as claimed in claim 1, wherein each 7 input terminals of the P L C controller are in a group, each group of input terminals is connected with 3 switches and 4 photoelectric sensors, one end of each 4 photoelectric sensor is separately connected with a terminal of the P L C, the other end of each 4 photoelectric sensor is connected with a power supply end of the P L C controller, each 3 switches are 1 knob switch and 2 button switches, one end of each 3 switch is separately connected with a terminal of the P L C, and the other end of each switch is connected with a COM end of the P L C.
4. The safety protection system of the grinding machine as claimed in claim 1, wherein the output end of the P L C controller is a group of one common end and 3 signal ends, the common end is connected with the fuse and then connected with the power supply live wire pole of the grinding machine, the signal ends are respectively connected with two alarms and a relay, the other ends of the two alarms and the relay are connected with the zero wire pole of the grinding machine, and the P L C controller and the grinding machine use the same power supply.
5. The grinder safety protection system of claim 4, wherein: the contacts of the relay are installed in branch power lines of each grinder.
6. The grinder safety protection system of claim 1, wherein: the alarm is an audible and visual alarm.
7. The grinder safety protection system of claim 1, wherein: the circuit breaker is installed on the grinder power bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859634.7U CN211103459U (en) | 2019-10-31 | 2019-10-31 | Safety protection system of grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859634.7U CN211103459U (en) | 2019-10-31 | 2019-10-31 | Safety protection system of grinding machine |
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| CN211103459U true CN211103459U (en) | 2020-07-28 |
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| CN201921859634.7U Active CN211103459U (en) | 2019-10-31 | 2019-10-31 | Safety protection system of grinding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110712132A (en) * | 2019-10-31 | 2020-01-21 | 贵州航天工业学校 | Safe operation monitoring and protecting system of grinding machine |
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2019
- 2019-10-31 CN CN201921859634.7U patent/CN211103459U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110712132A (en) * | 2019-10-31 | 2020-01-21 | 贵州航天工业学校 | Safe operation monitoring and protecting system of grinding machine |
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