CN218495005U - Chain breakage alarm protection device for boiler slag conveyor of coal-fired power plant - Google Patents
Chain breakage alarm protection device for boiler slag conveyor of coal-fired power plant Download PDFInfo
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- CN218495005U CN218495005U CN202221799811.9U CN202221799811U CN218495005U CN 218495005 U CN218495005 U CN 218495005U CN 202221799811 U CN202221799811 U CN 202221799811U CN 218495005 U CN218495005 U CN 218495005U
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Abstract
The utility model discloses a coal fired power plant boiler dragveyer chain rupture warning protection device belongs to chain rupture protection field. The utility model discloses a rim plate base, rim plate, sensor and response piece. The rim plate sets up on the rim plate base, and the edge of rim plate is equipped with a plurality of archs, all is equipped with the response piece in each arch, is provided with a plurality of sensors around the rim plate on the rim plate base, the position phase-match of the position of sensor and response piece. When the wheel disc normally works at a constant speed, the induction sheet passes over the sensors at a constant speed to generate a pulse at a constant speed, and the pulse generation time among the sensors is different, but the frequency is consistent. When the chain of dragveyer breaks, the rotation of rim plate stops or stalls, and all sensors can produce abnormal frequency's pulse simultaneously, send out the instruction and shut down this moment, and if single sensor trouble, only can carry out the warning that the sensor damaged, can not shut down, improved the accuracy that the chain was reported to the police by a wide margin, prevent dragveyer mistake and stop.
Description
Technical Field
The utility model belongs to chain rupture protection field, specifically speaking relates to a coal fired power plant boiler dragveyer chain rupture warning protection device.
Background
The scraper slag conveyor is mainly used for separating solid matters with certain granularity from a liquid-solid mixture. Is a continuous and efficient mechanical deslagging device, and is commonly used in the occasions of separation or solid-liquid separation. Such as: boiler deslagging systems, river dredging systems, and the like.
The existing chain breakage protection mechanism mostly adopts single sensor alarm, and because the working environment of the slag conveyor is severe, the sensor or the line is easily damaged to cause false alarm, the false stop of the slag conveyor is caused, and the operation of equipment is influenced. However, other prior arts do not have a scheme capable of better solving the problem of false alarm.
For example, the chinese patent application No. 2020232689856 describes a protection switch for step chain breakage, in which the alarm mode is a U-shaped photoelectric sensor disposed at the upper and lower ends of the chain to monitor the condition of the chain in real time, when the chain is broken, the signal received by the photoelectric sensor reports an error, and two sensing systems are disposed on the upper and lower sides of the chain turntable respectively to cut off the power supply in time, but the problem of false alarm is not optimized. Because the corresponding working occasion is the elevator, the sensitivity of the sensor is also higher, the sensor is kept in a closed space below the elevator, the influence of external factors is less, if the sensor is used on a slag conveyor, the corresponding working environment is worse, the external sensor or the circuit is easy to damage, and the overhigh sensitivity is not suitable for the working environment.
Therefore, a new design is needed that works in combination with multiple insurance and is suitable for the harsh environment of a dragger.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that prior art exists, an object of the utility model is to provide a coal fired power plant boiler dragveyer chain rupture alarm protection device.
In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:
the utility model provides a coal fired power plant boiler dragveyer chain rupture warning protection device, includes rim plate, rim plate base, sensor and response piece, the rim plate set up on the rim plate base, the edge of rim plate be equipped with a plurality of archs, the arch on be equipped with the response piece respectively, the rim plate base on be equipped with the sensor that corresponds with the response piece.
The sensor is a Hall sensor.
The sensor is a photoelectric sensor.
The induction sheet is an induction iron sheet.
The induction piece is a reflection piece.
The interval between every two bulges of the wheel disc is the same.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a plurality of sensors detect jointly, and wherein single sensor damages and fails and can not cause direct shut down yet, just can send the instruction of shutting down after reporting the mistake simultaneously when all sensors, can prevent effectively that the dragveyer from taking place the mistake and stopping, and the operation of influence equipment improves dragveyer chain rupture warning accuracy by a wide margin, reduces the fault rate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. a wheel disc base; 2. a wheel disc; 3. a sensor; 4. and a sensing piece.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
Example 1
As shown in figure 1, the utility model mainly comprises a wheel disc base 1 and a wheel disc 2.
One side of the wheel disc base 1 is provided with a wheel disc 2, the other side of the wheel disc base 1 is provided with a chain gear, and the chain gear is connected with the wheel disc 2 and is coaxial with the wheel disc.
One side that rim plate base 1 is located rim plate 2 is equipped with sensor 3, and sensor 3 sets up around the disc 2 at center, and sensor 3's sensing direction sets up towards the 2 centre of a circle of rim plate, and the sensor 3 that adopts in this embodiment is hall sensor. The edge of the disk of the wheel disk 2 is provided with a plurality of protrusions, three protrusions are arranged in the embodiment, and the distance between every two protrusions is equal, so that the protrusions in the embodiment are distributed on the wheel disk in a regular triangle shape. Each protrusion is provided with an induction sheet 4 on one side facing the sensor 3, and an induction iron sheet is arranged corresponding to the hall sensor in the embodiment.
After the device starts, the chain gear drive rim plate 2 of 2 opposite sides of rim plate rotates, the instruction that sensor 3 received this moment is for detecting the uniform motion, every when 2 rotatory rounds of rim plate, the arch in 2 outsides of rim plate also rotates along with the rim plate, when response piece 4 is close to sensor 3, thereby hall sensor produces the electric effect and produces the pulse output, interval between the three arch equals, and the rotation is the uniform rotation, therefore the frequency that a plurality of response pieces 4 contacted the 3 produced pulses of sensor is fairly stable. Due to the fact that the plurality of sensors 3 are arranged, if one sensor 3 is in fault, pulse signals caused by the induction sheet 4 cannot be detected, but other sensors 3 can normally output pulse signals, the machine cannot be stopped at the moment, and the corresponding sensor 3 gives an alarm to remind an operator of replacement.
When the chain breaks, rim plate 2 generally has two kinds of condition, and the stall or chain gear lose load stall stop the operation, and what sensor 3 detected is pulse at the uniform velocity, and after rim plate 2 stopped rotating, sensor 3 can not accept pulse signal for a long time, or one of them sensor 3 keeps the high potential for a long time, can't produce the pulse, and whole sensor 3 all have the corresponding condition to produce this moment to send out the instruction and let the machine shut down. In the case of stall, the pulse signal frequencies of all the sensors 3 become very fast, and all the sensors 3 detect the pulse with abnormal speed and directly send out a stop command.
Example 2
The present embodiment has the same structure as that of embodiment 1, except that the sensor 3 used in the present embodiment is a photoelectric sensor, and the sensing plate 4 used in the present embodiment is a reflective plate.
The operating principle of this embodiment differs a little from the hall sensor, and when the salient point on the wheel disc 2 rotates to the position of the sensor 3, the light emitted by the reflective sheet reflective sensor 3, and the photoelectric sensor generates a pulse.
The control principle is the same as that of the embodiment 1, and when the pulse signal is not received for a long time or the speed of the pulse signal is too high, the instruction is sent to stop the machine.
Claims (6)
1. The utility model provides a coal fired power plant boiler dragveyer chain breakage warning protection device, a serial communication port, including rim plate, rim plate base, sensor and response piece, the rim plate set up on the rim plate base, the edge of rim plate be equipped with a plurality of archs, the arch on be equipped with the response piece respectively, the rim plate base on be equipped with the sensor that corresponds with the response piece.
2. The chain breakage alarm protection device for the slag conveyor of the coal-fired power plant boiler according to claim 1, wherein the sensor is a hall sensor.
3. The chain breakage alarm protection device for the slag conveyor of the coal-fired power plant boiler according to claim 1, wherein the sensor is a photoelectric sensor.
4. The chain breakage alarm protection device for the slag conveyor of the coal-fired power plant boiler according to claim 2, wherein the induction sheet is an induction iron sheet.
5. The chain breakage alarm protection device for the slag conveyor of the coal-fired power plant boiler according to claim 3, wherein the sensing pieces are light reflecting pieces.
6. The coal fired power plant boiler dragveyer chain breakage alarm protection device of claim 1 wherein the spacing between each of the projections of the wheel disc is the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221799811.9U CN218495005U (en) | 2022-07-13 | 2022-07-13 | Chain breakage alarm protection device for boiler slag conveyor of coal-fired power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221799811.9U CN218495005U (en) | 2022-07-13 | 2022-07-13 | Chain breakage alarm protection device for boiler slag conveyor of coal-fired power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218495005U true CN218495005U (en) | 2023-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221799811.9U Active CN218495005U (en) | 2022-07-13 | 2022-07-13 | Chain breakage alarm protection device for boiler slag conveyor of coal-fired power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218495005U (en) |
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2022
- 2022-07-13 CN CN202221799811.9U patent/CN218495005U/en active Active
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