Marine Electro-hydraulic Windlass The windlass is installed on the main deck of the ship's bow, which is used for the ship to lift the anchor and drop the mooring cable. Marine Electro-Hydraulic Windlass,Windlass Anchor,Electric Windlass,Manual Windlass TAIXING HAITAI GLOBAL TRADE CO.,LTD , https://www.jiangsuhaitship.com
Windlass can be divided into manual, electric, hydraulic, pneumatic, etc. according to the driving form.
The windlass can be divided into several specifications such as φ12--φ120mm according to the diameter of the anchor chain.
Windlass can be divided into single-sided and double-sided according to the distribution of drums.
The windlass is mainly composed of base, bracket, chain wheel, brake, chain wheel, gearbox, electric control system (except manual windlass), etc. Electric windlasses have electric motors, and hydraulic windlasses have hydraulic pump stations.
The main technical indicators of the windlass include the diameter of the anchor chain, the nominal speed of the anchor, the rated load, the supporting load, several levels of speed change, electrical system, etc. The installation of the windlass on the ship should ensure that the wrap angle between the anchor chain and the sprocket is 117-120°.
Electric windlass
The electric motor directly drives the windlass, and the drive shaft is driven by the gear box to work, and the structure is simple; it is generally suitable for windlasses with an anchor chain diameter of 16mm-93mm.
hydraulic windlass
It is suitable for windlass with anchor chain diameter of 16mm-120mm. Hydraulic windlasses are also called electro-hydraulic windlasses. It drives the oil pump with a motor, drives the motor with high-pressure oil, and then drives the transmission gear through a reducer (or no reducer). To make the windlass run, its structure is relatively compact and its volume is small. Now there has been an automatic hydraulic windlass, which is equipped with an anchor chain length sensor. When the anchor chain needs to be thrown out, the windlass will automatically stop; , can automatically decelerate; the anchor will automatically stop when it enters the anchor chain drum and is properly received.
Principle and installation method of smart home wireless smoke detector
As we all know, fires cause serious disasters to families, financial losses for the lighter, and personal injury for the heavy. For a family, there are many reasons for fire: inadvertent use of fire, smoking, aging of electrical equipment, improper installation of electrical equipment, etc. And the smart home detector to prevent fire is not soft. It is like a loyal family guard. In the early stage of the fire, it can control the fire in time and kill the danger in the cradle. The following explains the correct installation of the smart home detector. working principle.
(1) Wireless smoke detector
The wireless smoke detector is a smoke detector that can accurately detect smoke. When the smoke concentration exceeds the limit, the sensor emits an acousto-optic alarm and outputs an alarm signal to the collector. The smoke detector uses ionized smoke sensing inside. The smoke sensor is stable and reliable, and is widely used in various fire alarm systems and smart home systems.
Smart home wireless smoke detector working principle and installation:
After installing the wireless smoke detector, people can monitor the presence of gas leaks and fire hazards in the home in real time. It is very convenient. The wireless smoke detector has a radioactive source é•…241 inside and outside the ionization chamber. The positive and negative ions generated by ionization are in the electric field. Each of them moves to the positive and negative electrodes. Under normal conditions, the current and voltage of the internal and external ionization chambers are stable. Once there is smoke, escape the ionization chamber.
Interfering with the normal movement of charged particles, the current and voltage will change, destroying the balance between the internal and external ionization chambers, so the wireless transmitter sends a wireless alarm signal, notifying the remote receiving host, transmitting the alarm information, wireless smoke The detector adopts the optical principle smoke detection room, which can accurately detect the smoke generated in the early stage of the fire. It has its own buzzer and can independently alarm the low voltage alarm function. The installation height of the alarm is 6 meters or less and the protection area is 60 square meters. .
1. Installation and use: Select the monitoring area and install the alarm on the roof or ceiling of the surveillance area.
2. Note: Do not install outdoors; do not install it in places with large air flow such as air supply port, ventilation fan, door, etc.; do not install it in a place that is 10 ~ 50 °C or relatively humid; the installation position of the alarm is from the corner Must be greater than 0.75 meters; must be dust-proof and moisture-proof;
3, maintenance: due to dust and other factors will cause the sensitivity of the alarm to decline, it is necessary to conduct frequent testing and maintenance; once a week to detect the alarm, press the test button; clean the alarm once every six months, turn off the power, use Clean the dust with a soft brush.
(2) Smoke detector:
The classification of smoke detectors is generally classified into a bit type and a line type from the detection range, and the point type is further divided into an ion sense smoke and a photo-electricity smoke, and the line type is further divided into a laser smoke detector and a separate infrared beam smoke detector. Most of the smoke detectors suitable for our family use are photo-electric smoke detectors.
The working principle of photo-electric smoke detector:
The photo-electricity smoke detector is developed by utilizing the basic property that the smoke generated during the fire can change the propagation characteristics of the light. When the smoke concentration reaches a certain degree, the photo-electricity smoke detector sends an alarm signal according to the smoke particle to the light. Absorption and scattering. Photoelectric smoke detectors are divided into two types: shading type and astigmatism type. According to the different access modes and battery power supply modes, they can be divided into networked smoke, independent smoke, and wireless smoke.
Networked smoke detectors are generally suitable for large-scale fire alarm systems. It is simple to understand that it needs to be used with the central control unit and cannot work independently. It only has front-end signal acquisition without field output function, independent smoke detector. Generally suitable for home use, it can collect alarm signals on the spot, and send out alarm sound and light on site, which is easy to install.
Wireless smoke detector is generally suitable for small household wireless alarm system. It is used with the central control host and wireless communication with the control host. The structure of the photo-electric smoke detector is as follows. When the smoke is generated at the beginning of the fire, the smoke is generated. After entering the storage chamber, the sensor fails to receive infrared light normally, and the detector gives an alarm.
Photoelectric Smoke Detector Installation Precautions:
1. Smoke detectors should not be installed in places where smoke and water vapor concentration are high.
2. The detector should be installed horizontally. When it is really necessary to install it obliquely, the angle of inclination should not exceed 45 degrees.
3. The horizontal distance between the detector and the wall and the beam edge should not be less than 5 meters; there should be no obstruction within 0.5 m of the horizontal distance around the detector.
4. The horizontal distance from the detector to the nearest side of the air supply air outlet should not be less than 5 meters; the horizontal distance to the aperture of the porous air supply top grid should not be less than 0.5 meters.
(3) Wireless infrared detector
The infrared probe can only be installed indoors, and the false alarm rate has a great relationship with the installation position. The correct installation position should be 2.0 - 2.2 meters away from the ground, away from the air temperature, refrigerator, stove and other places where the temperature of the air is sensitive.
1. The infrared probe should be installed in the corner of the room as much as possible to obtain the most ideal detection range. There should be no screen, furniture, large bonsai or other spacers in the detection range.
2. The infrared probe should be at an angle to the walking line in the room. The infrared probe is the least sensitive to the radial movement reaction, and the most sensitive to the tangential direction (ie, the direction perpendicular to the radius). Select the appropriate installation position on site. It is an extremely important part to avoid the false alarm of the infrared probe and to obtain the sensitivity of the detection.
(4) Door magnetic detector installation requirements
1. The door magnetic detector is installed on the door frame of the door or window that you need to control, that is, the door magnetic detector (main part, auxiliary part) is fixed on the frame of the door and window.
2. The false alarm rate has a great relationship with the installation position. The recommended installation position should be the gap between the main part and the auxiliary part ≤ 2mm.
(5) Household gas leakage wireless alarm installation requirements
　 Household gas leak wireless alarm installation
1. First determine the specific gravity of the combustible gas and air, and then fix the alarm to a suitable position within 1.5M from the radius of the gas source: A. Gas, lighter than air, floating in a high place; B. Natural gas, lighter than air, Floating in a high place; C. Liquefied petroleum gas, heavier than air, deposited in a low place;
2. After the power is turned on, the alarm will beep once, and the power light will be on constantly. The function light will flash green. After about 2 minutes, it will go out, indicating that it has entered the alert state. When there is a gas leak, it will be issued.嘀"Alarm sound, at the same time the function light flashes red, and the alarm will automatically enter the alert state after the alarm is removed;
3. If the sensor fails, the alarm will sound "嘀-" and the function light will be yellow and bright. After the fault is removed, it will automatically enter the alarm state.
Precautions:
Do not install outdoors;
Do not install in a place with a large air flow such as air supply port, ventilation fan, or door;
Do not install in a place that is 10 to 50 ° C or more humid;
Do not install in an area where objects separate the alarm from the gas equipment;
Avoid using a large amount of solid-state spray glue, insecticide, paint adhesive, diluted alcohol, etc. near the alarm;
If the alarm malfunctions, do not disassemble and repair it yourself, and notify the supplier or the nearest agent.