Model No.: GSH900
1. Product application and usage range
GSH900 mining speed sensor is mining intrinsically safe type structure, which could be used for the place under coal mine with coal dust and methane explosive gas, and is used as the collection device of speed detection signal in the belt conveyor electrical control system.
2. Product features
The sensor have the characteristics such as small size, light weight,easy installation, reliable action, water proof, moisture proof and easy maintenance.
3. Product Model and Significance
Explosion-proof type of sensor: Mining intrinsically safe type ExibI Mb
Sensor Model Explanation
4. Related devices
The related device of the sensor is KHP121A-Z coal mine explosion proof and intrinsically safe type controller of belt conveyor protection device.
5. Ambient condition
5.1 Normal working condition
a) Altitude less than 2000m.
b) Ambient temperature within 0℃~+40℃.
c) Relative humidity not over 95% (+25℃).
d) Atmospheric pressure: 80kPa~106kPa
e) The place under mine with coal dust and methane explosive gas.
f) The place without corrosive gas which could damage metal and insulation.
g) No serious vibration.
5.2 The worst ambient condition of storage and transportation.
a) High temperature: +60℃.
b) Low temperature: -40℃.
c) Relative humidity not over 95% (25℃).
d) Vibration: accelerated speed 50m/s².
e) Impact: peak accelerated speed 500m/s².
II. Technical features
a) Rated working voltage: DC 12.5VAltitude less than 2000m.
b) Max working current.
c) External magnetic field type: unipolarity.
d) Action distance: ≥8mm ( Magnet Steel Size: φ25mm×5mm)
e) Output signal: Pulse output, frequency 0~15 Hz.
f) Speed measure range: 0~900 rpm.
g) Measurement error: ≤2.5% ( Corresponding to specified speed measure).
h) The repeatability error does not exceed 2/3 of the basic error limit absolute value.
i) The return difference is not exceed the basic error limit absolute value.
j) This product can only be used in the qualified intrinsically safe circuit and the whole must be evaluated.
III. Structure features
The structure of speed sensor is shown in below figure. The speed sensor is made by using epoxy resin to seal the detection element and circuit board in a cylindrical brass shell,This sensor has small size, light weight, which is easy to install and use, there is long enough reserved cable witch can connect into the control device directly. Size: 75mm×101mm×20mm. shell material: brass H62. Weight: 1.5kg
IV. Working Process and Principle
This speed sensor is based on the Hall induction principle, detecting the magnetic field artificially put on the measure object, and use this magnetic field as the carrier of the object information be measured, so that to change the non-electric, non-magnetic physical quantity (speed) of the measured object into electric quantity to detect and control.
V. Installation and wiring
During the installation of the speed sensor, the speed generator and the passive rotating roller of the belt conveyor should be fixed in concentric, then the sensor and the speed generator should be fixed vertically, to adjust the height of the sensor so that the diameter φ25 magnetic steel on the speed generator could go through the center of the testing side when the speed generator rotates with the belt conveyor. When install the speed sensor, on the circumstance of no touch to the magnetic steel, the closer the better.
VI. Usage attention
1. The structure and every electrical parameters of the sensor have been debugged before leaving the factory, the user shall not change its structure and electrical parameters at will to ensure the performance of protection, explosion-proof and intrinsically safe. This product can only be used with designated device, or the devices have explosion proof tested.
2. There should be no iron object between the sensor and magnetic steel. The sensor is installed after debugging, the working condition of the sensor directly determines whether the deviation protection of the control device can work, and the non-professional personnel is not allowed to take off or install the sensor.
3. It is necessary to test the magnetic induction intensity regularly, if it is less than 1100 Gs, the magnetic steel should be replaced in time.
4. The improper changes of internal components wiring may cause equipment damage, our company does not bear the liability and economic losses caused by above-mentioned accident.
5. The packing carton can be used for all kinds of transportation including land and water under the condition of avoiding direct rain and snow.
6. The packaged device can be stored in the warehouses with air circulation, the temperature is (-10~40)℃, relative humidity not over 90% for more than 12 months.
7. Take out the packing list and compare with each item to confirm the conformity.
8. To check the nameplate on the sensor is comply with the order requirement.
Huafei Company could provide Different Kinds Of Sensors，such as complete Automatic Control Sensor, Mining temperature sensor for belt conveyor, Belt Conveyor Safety Protection, Belt Conveyor Sensor, belt conveyor automatic control sensor, Explosion Proof Sensor, Belt Conveyor Sensors and Other Belt Conveyor Safety Protection.
Expert of Electric Automation, Base of Variable Frequency Drive
--Jiaozuo HUAFEI Electronic & Electric Co., Ltd.
Huafei Company was established in 1987 which is the first batch of National Grade High-tech Enterprise.
The company has successively been approved to be [Top 50 Provincial Equipment Manufacturer", [Provincial Enterprise Technical Center", [the Provincial VFD Engineering Technology Research Center", [Provincial Intelligent Engineering Technology Research Center of Main Coal Flow Conveying System in Mine" and it is the post-graduate training base of Henan Polytech University.
The company has passed the authoritative management system certification of the quality, environment, occupational health and safety, the main products have obtained national 3C, CE certificate of European Union and Other product certification. Having more than 100 core technologies, more than 200 national patent technology, the main products have reached the international leading level, part of the products have won Gold Award of Brussels Eureka World Invention Expo.
For the past more than 30 years, the company has always been carrying the business philosophy "Integrity make quality, Tech make the future", insisting the business mission "create safer, more intelligent, better use of industrial products", continue to contribute to improve the level of intelligent equipment in the mine main transportation system.