What is the spring anti-breakage system for industrial lifting doors (industrial sliding doors)?

What is the spring prevention system for industrial lifting doors (industrial sliding doors)?

The spring in the industrial lifting door (industrial sliding door) is also called a torsion spring. The torsion spring is also a torsion spring (hereinafter referred to as torsion spring). The use of torsion spring It is still very large, and the torsion spring requires precise calculation. It is the focus of the industrial sliding door balance system.

If the torsion spring is wrong, serious consequences will occur. Next, our Qishli company will talk about the industrial sliding door spring breakage prevention system. Before introducing the spring anti-breakage system, let us first understand the components of the industrial sliding door.

1. Industrial sliding door composition

1. Door panel The total thickness of the door panel is 40mm±1mm, and both sides are 0.5mm Thick Baosteel color-coated steel plate, the coating treatment from top to bottom is polyester coating, primer, passivated galvanized layer, embossing, and strip-shaped ribs on the front and back to enhance the strength of the door panel. The two layers of steel plates are filled with rigid polyurethane foam, with a density of about 40kg/m³ and a thermal conductivity of less than 0.033W/m.k. A continuous steel belt is provided at the hinge installation position to ensure that the hinge is firmly installed. For door panels over 5m long, reinforcement bars with a height of 80mm are provided on the inner side of each door panel to ensure that the door panel has a wind resistance strength of level 12 or above. There is an EPDM rubber sealing strip at the bottom of the segmented door panel, and an airbag is installed in the sealing strip.

2. The door panel connecting hinges of hardware accessories are made by stamping hot-dip galvanized cold-rolled steel plates. The material thickness is 2.0mm, and the galvanizing thickness is greater than 28um. The guide rail is a 3-inch industrial door guide rail made of 2mm hot-dip galvanized steel plate. The cross-section shape of the guide rail is equipped with anti-decoupling to ensure that the guide wheel runs smoothly in the guide rail. The guide rail guard is made of δ=2mm hot-dip galvanized steel plate. , the guard plate is equipped with a slot for the door side sealing rubber and a mounting hole connected to the guide rail; the guide wheel is a 72mm industrial door guide wheel. The guide wheel material is wear-resistant, contains roller bearings, runs smoothly and has no noise. The rest of the hardware accessories are made of hot-dip galvanized steel sheets, with accurate dimensions and good interchangeability..

3. Balance system The sliding door adopts torsion spring balance. The balance torsion spring is designed according to the door heavy load software calculation, and the produced torsion spring makes the balance reach the best state. The torsion spring material is made of 60si2Mn imported spring steel, ensuring a service life of more than 80,000 cycles. The balance shaft of the sliding door is made of solid round steel with a diameter of 25.4MM. The balance shaft is equipped with a torsion spring breakage protection device. This device can prevent the door panel from falling when the balance torsion spring breaks. The safety factor of the lifting wire rope is greater than 5 times the door panel\’s own weight, and an anti-breakage wire rope is installed on the door panel to ensure safe operation of the door panel.

4. Safety protection device

(1) There is an airbag at the bottom of the door. During the closing process of the door If an obstacle is encountered, it can automatically run in reverse direction to open the door.

(2) There is a blade-type wire rope anti-breakage protector at the bottom of the door. When the lifting wire rope breaks and the door body suddenly accelerates, the device can cut into the guide rail. Prevent the door from falling.

(3) The motor is equipped with a disengagement clutch device. When switching to manual, the door movement can be operated manually.

5. Sealing strips: EPDM rubber sealing strips are installed on the top and both sides of the door opening, and EPDM rubber sealing strips are installed on the bottom of the door body. Ethylene-propylene rubber airbags and sealing strips ensure good sealing between the door and the building.

6. Industrial sliding door operation Lifting door operation is divided into manual control mode and electric control mode:

(1) Manual control method: The door can be raised and lowered manually at one time. In the event of a power outage, the door can be opened manually.

(2) Electric control method: (based on manual control) there is a standard operating button box next to each lifting door, which can be controlled by controlling the upper button on the button box. , stop, and press buttons to open and close the door. And run to the end on the door bodyposition, it will automatically stop.

(3) Manual/automatic switching: There is a clutch release device on the motor. When there is a power outage, the clutch release device can be manually operated to switch the drive from electric to Manual, open and close the door manually.

2. Industrial sliding door spring anti-breakage system Industrial sliding door spring is also called industrial sliding door torsion spring. Torsion springs, as we all know, are used as safety and balance devices on industrial lifting doors, and torsion spring anti-breakage protection devices can prevent the door body from harming people and objects in any way.

1. Spring anti-breakage protection device The torsion spring is an important component of the balance system of the lift door. It controls the door body to maintain balance when running up and down. If the spring breaks accidentally, the balance of the industrial door body will be destroyed, causing the door body to fall and a major accident to occur. This device can block the balance shaft when the spring breaks, thereby preventing the door body from falling. When dealing with the balance of industrial sliding doors, industrial lifting doors generally use a torsion spring balancing system (torsion spring and wire rope pulley) for balance. The balancing system plays a vital role in the entire door. A good balance system should be that at any position during door operation, the weight of the industrial door and the balancing force generated by the balance system are equal, that is, the industrial lifting door should always be in a balanced state. In this way, the industrial door should be able to stay in any position, and when operated manually, the door can be moved up or down with very little force. When users choose industrial door torsion springs, they must make accurate measurements and calculations to determine the length, shaft diameter, steel wire, and number of turns of the torsion spring. Otherwise, it will cause installation difficulties and a high failure rate. Since the torsion spring of the industrial sliding door is lengthened, sometimes the installation distance on the balanced solid shaft is not enough. In this case, it is necessary to enlarge the inner diameter of the torsion spring and shorten the length of the torsion spring so that sufficient installation and adjustment distance can flow out.

2. Strengthen the application of torsion spring design software. At present, Qishli Company\’s torsion spring design software has been used for more than 20 years. Software developed based on Dos, in data optimization andMany issues need to be considered in terms of matching new wire rope pulleys. Based on the actual situation, this software is the main one. In practice, the main considerations for torsion spring operation and production are:

1. Enter the door opening Dimensions (door width data-track=\”24\”>Three, enter the installation method (standard improvement);

Four, enter the model of the wire rope pulley;

5. Enter the service life of the torsion spring and obtain the design results of the torsion spring.

The role of springs in industrial sliding doors cannot be underestimated. The spring anti-breakage system can be remedied immediately when there is a problem with the balance system. To avoid danger. Qishli warmly reminds you that when choosing industrial sliding doors, you must go to regular manufacturers. We are a modern company integrating design, production, sales, installation, and after-sales service. The industrial sliding doors produced by our company The doors are sold overseas and are well received by customers.