Basic Principle and Structural Analysis of PVC high speed door

1. Control System And Motor

Relationship between control system and motor: command transmission and execution, speed and direction control, protection and feedback mechanism

1.1 Command transmission and execution: The opening and closing of the fast door is closely related to the controller.The controller is the central hub for receiving and processing various signals. When a door opening or closing signal is input,For example, a signal is sent by a remote controller, and a trigger signal is sent by an induction device (such as infrared induction, geomagnetic induction, etc.).The controller will quickly identify and process these signals.

For example, if High Speed Doors is equipped with geomagnetism, when metal is close to the door,It will contact the signal to open.

1.2 Speed and direction control: The reason why the rapid door becomes fast mainly depends on the drive system and control system.In terms of driving system, high-performance motors (such as variable frequency motors) can output powerful power to make the door move quickly.Moreover, high quality transmission devices (such as efficient worm gears or sprocket chains) can reduce energy consumption.And that pow of the motor is efficiently transmitted to the door body.

1.3 Protection and feedback mechanism: In terms of protection, when the door body encounters obstacles during operation,The infrared safety light curtain or contact sensor will quickly sense and transmit the signal to the controller, and the controller will stop the action of the door immediately.Prevent collision damage. At the same time, the motor overload and overheat protection device can automatically cut off the power supply when the motor is abnormal, so as to avoid the motor burning.

In terms of feedback mechanism, the door position sensor is very sensitive.It accurately feeds back the opening height, closing degree and running position dynamics of the door to the controller in real time.Based on this, the controller adjusts and controls intelligently to ensure the smooth operation of the door body.The protection and feedback mechanism cooperate to build a solid barrier, and the speed door operates safely and stably, which greatly reduces the probability of failure and prolongs its life.Reduce maintenance and update costs.

2. Material composition of quick door-curtain and track

PVC high speed gate: PVC (polyvinyl chloride) material and door frame made of cold-rolled steel

2.1. PVC material (polyvinyl chloride): It is usually used on the door curtain. PVC material has good flexibility.The tearing strength can reach 600/600 warp/weft, and the color of the door curtain is various, and the conventional color is red, yellow, blue, white,Gray and other colors, support customized special colors, such as transparent colors, for various industrial occasions.

2.2. Cold-rolled steel for door frame: the door frame of conventional high speed door, also known as track, has high strength of cold-rolled steel plate and relatively low material cost.It can bear large pressure and weight, with high dimensional accuracy and good surface quality.The cold-rolled steel sheet is produced by a cold-rolling process in which the grain structure of the steel sheet is refined,O that the strength is obviously improved.For the door frame, higher strength means that it can better withstand the impact of frequent opening and closing of high speed roller shetter    

For example, in a use environment such as an industrial plant, a transportation tool such as a forklift may accidentally collide with a door frame,Cold-rolled steel door frames can effectively resist such collisions and reduce the possibility of door frame deformation.In our real life, we can find that the tracks of high speed fabric door can be used in addition to cold-rolled steel.Aluminum alloy or 304 stainless steel. The functions and applications of the three materials are different.The cold-rolled steel plate rail can meet the requirements of general industrial and civil occasions on the strength of the rail,It is widely used in industrial and civil buildings which are sensitive to cost and have relatively good environmental conditions.

The aluminum alloy has excellent process performance, is easy to carry out various machining and for processes,Can manufacture track components with complex shapes and high precision requirements,It is suitable for places where the weight is strictly limited and the corrosion resistance is required.

304 stainless steel track is suitable for places with high requirements for corrosion resistance, sanitary conditions and aesthetics.Such as cold storage, pharmaceutical production workshops and other places.

 3. Safety Protection Device of PVC Rolling Shutter Door

Safety protection device of speed door: infrared induction safety light curtain, safety bottom edge, emergency stop button.

3.1 Infrared sensing safety light curtain

3.1.1 Principle: The infrared induction safety light curtain is composed of multiple groups of infrared transmitting and receiving devices.When the door body descends, if there is an object blocking the infrared rays in the light curtain, the light curtain will detect it immediately.And transmit that signal to the controller.For example, in the logistics warehouse, the forklift enters and exits frequently, when the forklift passes through the PVC fast door, the light curtain can detect accurately.Prevent the door body from falling and colliding with the forklift.

3.1.2 Function: It can effectively protect people and vehicles from injuries caused by accidental closing of the door body.It is one of the most common safety protection devices for high speed door, which greatly improves the safety of  PVC rapid door

3.2 Safety bottom edge (contact sensor)

3.2.1 Principle: The bottom safety edge is usually a rubber strip installed on the bottom edge of the door body.The inside of the rubber strip contains inductive elements such as conductive rubber or Micro switch.When the door body contacts an obstacle in the descending process, the safety edge is extruded,The internal sensing element triggers and sends a signal to the controller.

3.2.2 Function: It can react at the moment when the door body is in direct contact with the obstacle, and stop the door body from descending in time.Avoid damage to obstacles, especially to prevent the door body from pinching small objects or people moving slowly.

3.3 Emergency stop button

3.3.1 Principle: The emergency stop button is a manual control device, which is usually installed in a conspicuous position near the express door.In case of emergency, if the personnel are clamped by the door body or the door body is found to operate abnormally, press the emergency stop button.The button will either cut off the power directly or send an emergency stop signal to the controller.

3.3.2 Function: It provides a rapid and effective means of emergency intervention for on-site personnel, and can stop the operation of the door body in the shortest time.Prevent further expansion of the accident.

4. Auxiliary system and function of Industrial PVC rapid door

Auxiliary system of the rapid roller doors: windproof system, thermal insulation system, sound insulation system.

4.1 Function of windproof system:

4.1.1 Maintain stable indoor environment: in windy weather,The windproof system can effectively prevent foreign matters such as dust, impurities and insects from entering the room through the High speed gate.For example, in industrial plants or logistics warehouses, keeping dust out can keep the working environment clean.And is favorable for equipment maintenance and product quality guarantee.

4.1.2 Enhance the stability of the door body: by reinforcing the structure of the door body and strengthening the sealing,The windproof system can prevent the door body from shaking or deforming violently in strong wind.This not only prolongs the service life of the High Speed PVC Curtain Gate, but also ensures its normal operation.Reduce repair costs and downtime due to damaged door bodies.

4.1.3 Reduce energy loss: The windproof system can reduce the convection of indoor and outdoor air, thereby reducing the loss of indoor heat or cold.In winter, it can prevent the outflow of indoor heating; in summer, it can prevent hot air from entering the room.This energy conservation function helps to reduce the energy consumption of the building,For places with temperature control requirements (such as constant temperature warehouses, production workshops), it can effectively save energy costs.

4.2 Function of thermal insulation system

4.2.1 Temperature control: in the cold storage, food processing workshop, pharmaceutical workshop and other places sensitive to temperature,The insulation system is critical.It can effectively maintain the required indoor low or high temperature environment to ensure product quality and production process requirements.For example, in the cold chain logistics warehouse, the insulation PVC fast door can prevent the outside heat from entering and maintain the refrigeration state of the goods.Reduce the workload of refrigeration equipment.

4.2.2 Energy saving and efficiency improvement: the insulation system reduces the heat transfer between indoor and outdoor, and reduces the energy consumption caused by temperature regulation.In commercial buildings, industrial plants and other places, the use of insulated PVC fast gate can make HVAC systems run more efficiently.Save on energy costs.For example, in an air-conditioned office or shopping mall, it helps to maintain a comfortable indoor temperature and reduce the frequent start of the air conditioning system.

4.2.3 Improvement of comfort: In some workplaces or living spaces that need to maintain a suitable temperature,The thermal insulation system can provide a more comfortable environment for people.It can reduce the impact of temperature fluctuations on the human body and make people feel more comfortable indoors.

4.3 Function of sound insulation system

4.3.1 Reduce external noise interference: in noisy industrial environments (such as factory workshops, construction sites), busy traffic areas (such as near the public Road or railway warehouses) or commercial premises in the city center, the sound insulation system can effectively block the outside noise into the room.For example, in hospitals, schools, offices and other places sensitive to noise,The sound-proof  PVC quick door can create a relatively quiet environment for people and improve the efficiency of work and study.

4.3.2 Prevention of internal noise transmission: For some indoor places (such as mechanical processing workshop and printing workshop) that will produce noise,Sound insulation system can prevent internal noise from leaking to the outside world and reduce noise pollution to the surrounding environment.This helps to meet environmental requirements and avoid neighborhood disputes caused by noise problems.

4.3.3 Improve the quality of acoustic environment: In places where the acoustic environment needs to be controlled, such as recording studios, acoustic laboratories, etc.,Sound proof  PVC speed door are an important part of the overall acoustic system.It can cooperate with other sound insulation materials and equipment to create an ideal acoustic space.Ensure the purity of the sound and the accuracy of the experiment.

5. Special design and application scenarios

5.1 Special design

5.1.1 Fast lifting design: advanced driving system and unique mechanical transmission mechanism are adopted.Such as high-performance motors, precision reducers, high-quality tracks and pulleys, etc.The door body can quickly complete opening and closing actions in a short time, and the passing efficiency is improved.Generally, the running speed is more than 0.6 meters per second, and some can even reach 2.5 meters per second, which greatly reduces the waiting time of personnel and vehicles.

5.1.2 Sealing design: Various sealing methods are adopted between the door frame and the door body, between the door curtain and the ground and between the two sides.After the passing as rubber sealing strips, brush seals and the like, can effectively prevent dust, insects, noise and the like from entering a room,At the same time, it can also reduce the convection of indoor and outdoor air, enhance the effect of heat preservation, heat insulation and sound insulation, and maintain the stability of indoor environment.

5.1.3 Safety protection design: equipped with various safety devices.Such as infrared safety protection electric eye, bottom safety protection edge, light curtain protection system, etc.The light curtain protection system uses 485 communication protocol through the grating wall installed in the vertical direction.The position of the door curtain is calculated according to the real-time height of the door curtain body so as to effectively protect passers-by or objects;The safety electric eye and the protective edge can quickly rebound the door to an open state when an object or a person is detected below the door body when the door body descends,Avoid collision accidents.

5.1.4 Wind-resistant design: for the rapid door used outdoors or in the environment with strong wind,By strengthening the structure of the door body, increasing the thickness and strength of the door curtain, and optimizing the connection mode between the guide rail and the door curtain, etc.Improve the wind resistance of the door, ensure that the door body can run stably under strong wind without being damaged or blown open,For example, the high speed door used in factories and logistics warehouses in some coastal areas can withstand 14 typhoons.

5.1.5 Thermal insulation design: the door body is filled with high-density polyurethane foam materials and other thermal insulation materials.Or a double-layer aluminum alloy curtain sheet with a broken bridge structure design is adopted, and a heat insulation material is sandwiched in the middle of the double-layer aluminum alloy curtain sheet, so that the heat exchange is effectively slowed down,Improves the heat preservation performance, reduces the energy consumption, is suitable for places with temperature control requirements,Such as cold storage, food processing workshop, constant temperature and humidity production workshop, etc.

5.2 Application Scenarios

5.2.1 Industrial field: in the automobile manufacturing plant, as a fast passage between the production line and the warehouse,It is convenient for the transportation of parts and the entry and exit of the whole vehicle, and its good sealing performance can also ensure the cleanliness requirements of the production workshop;In the port logistics center, it can effectively resist the attack of sea breeze, speed up the turnover of goods and improve operational efficiency;In heavy industries such as iron and steel plants, it can play the role of dust prevention and sound insulation, and reduce dust diffusion and noise pollution.

5.2.2 Food and pharmaceutical industry: Food processing and pharmaceutical enterprises have extremely high requirements for the production environment.It is necessary to prevent dust, insects, etc. From contaminating the product.The sealing performance and dust-proof and sound-proof effect of the Fast rolling shutter doors can meet this requirement and provide stable and reliable environmental protection for production.Ensure product quality and health and safety.

5.2.3 Warehousing and logistics industry: In large warehousing and logistics centers, the rapid entry and exit of goods is very important.The high-speed opening and closing and intelligent control characteristics of the express door can effectively improve the turnover speed of goods and reduce operating costs.At the same time, its thermal insulation, windproof and other properties also help to maintain the stability of the environment in the warehouse.

5.2.4 Commercial places: the unloading area or storage area of some large supermarkets and shopping malls, where the use of express doors can facilitate the entry and exit of vehicles and personnel.Improve work efficiency, while keeping the internal environment clean and the temperature appropriate, to provide customers with a better shopping experience.

5.2.5 Aerospace field: the industry has extremely high requirements for the cleanliness and safety of the production environment.The rapid door can not only provide a good sealing environment, but also resist the invasion of natural disasters such as strong wind.Ensure the smooth progress of production activities.

5.2.6 Special places: explosion-proof high speed roller shutter  will be used in inflammable and explosive places such as chemical industry and paint.Its explosion-proof grade can reach more than BT4 level, meet the requirements of safety and explosion-proof, and has the functions of fast switch, quarantine and dust-proof.Ensure the safety of the production process.

It is very important to choose a suitable quick door, which requires in-depth understanding of the PVC roller shutter doors.There are significant differences in the applicability of PVC roll-up doors made of different materials in various industries.Familiarity with product materials can not only achieve effective cost control to a certain extent, but also greatly improve the efficiency of production.Reduce energy consumption, bring more considerable economic benefits and more excellent production efficiency for enterprises.