【 Weak current College 】 door closer selection, use and maintenance repair

1. door closer usage requirements and select

Door closer products must meet the national standards GB9305-88, used for fire doors uses door closer it should also be consistent with the 1995 GA93-fire doors with door closer test.

Choose door closer should consider: the weight of the door, door width, frequency, and use requirements open the door and use environment, etc. Door weight and width of the door is to choose the door closer model of the main factors, common door with fire doors, wooden doors, aluminum doors, glass doors, steel doors, etc. Generally the weight of the door, you select the power of small, smaller models, and vice versa. While open frequency is closely related with product quality, the use of frequent occasions, should require products of superior sealing performance and long life.

Use requirements include:

1) is required to open the door with automatic stop after the function;

2) damping buffering function — to quickly open the door to a certain location resulting damping buffers, and buffer the damping force and can range from adjustable according to the requirements; the ability to prevent hard fast door lock collision when a door or wall, or emergency escape door to prevent people in fast forward during weightlessness and fell.

3) delay slow shut — door from opening the door of the maximum position of uniform slow shut down, in accordance with the requirements for stepless adjustment. Suitable for use in and out frequently and crowded places, particularly hospitals, elderly, children and persons with disabilities access door and channel.

4) closing force adjustable — you can use the door weight and door width range of very different door installation, as well as for environmental reasons to close higher resistance. Easily be adjusted to obtain satisfactory closing force, particularly in the coastal city, travel, and other wind resistance and close the door (door by force) often change.

5) use environment: fire protection requirements, and in the winter of minus 35 ° of places of antifreeze requirements.

Usually door closer selection according to the manufacturer's specifications, according to the different force size or adjustable force size to fit the size and weight of the door. The following table as standard in the United Kingdom BSEN1154 (a door closer classification of accepted standards), the provisions of the seven levels of quality/size of the door. Door closer to closing force typically specifies a number between 1 and 7 numeric, the higher the number, indicating that the ability of the door closer.

Test the quality/size door

Ability to size number

Recommended gate width

Test the door quality

2. installation of the door closer

A, door closer in installation mode

Usually most of the door closer is installed type door closer, the way they are installed as follows:

The most common standard usage is door closer to hinge side, the side door. When this installation, the door closer arm out, and the door frame to approximately 90 °.

The second variation, a door closer is installed in the hinge side opposite, the door is closed. Usually the one with the door closer with extra bracket to parallel to the door frame of arm. This usage is not willing to put the door closer is installed in the building, facing the door opened.

Door closer the fuselage, in turn, install to a door frame instead of a door, door closer in door hinges opposite side. This usage is also available in out open exterior door, especially on the very narrow along without enough wide space to accommodate the door closer the fuselage of the door.

B, door closer installation steps:

Usually with the door closer supplied instruction manual with installation template, read the manual, under the door closing forces of the direction, size and door closer fuselage, connections, and door hinge between installation dimensions to determine the location of the installation.

2) according to the requirements for door closing force size, through the connection block reverse 180 ° or change connection rod and the connection between the connection block, you can change the closed position. Adjust the connecting rod and door hinge centre line, the greater the distance, the door closer, the smaller the power off, on the contrary, the more powerful.

3) installation location on the model, determine the location of the mounting screws and drilling and tapping.

4) screws to install door closer fuselage.

5) install fixed connection block.

6) with screw driver Board.

7) will adjust the rod adjustment to the door frame to 90 °, then the connecting rod and driver Board connected together.

8) don't forget with plastic cover, which can be used to catch door closer leaking hydraulic oil.

9) after installation, check whether the securing screw fastening, no loose or unstable phenomenon. The door to the largest open location, check the door closer with hinged door with swivel or door frame touch or friction.

Door closer to closing speed

10) according to the need to adjust the door closer to closing speed. Usually door closer with 2 speed control (throttle valve core) screws. Above the adjusting screw to the first paragraph of the closing speed adjustment screws, below the adjusting screw to paragraph 2 (typically 10 & ordm;) closing speed adjustment screw.

C, door closer for use and maintenance, repair

New installation of the door closer with a week to 10 days or so, you should check all the screws and tighten it.

Use the manufacturer recommended hydraulic oil, cold regions should use low freezing point of hydraulic oil.

Door closer is put into use after regular checks, checks of the content is: install screw is loose and missing, connection whether the door arm or door frames touched rub5、the for deformation and loose, door buffer effects, support oriented pieces are leaking oil, etc.

Usually in the door closer use for some time the following issues:

1) mounting screws loose or missing, causing the door closer is not in the correct installation location, connection arm damage;

2) door closer is off the effect of variation of the buffer, causing the collision between the door and door frame, door deformation;

From the structure, the door closer is a closed whole, from the overall basic can't see their quality is good or bad.

Door closer is the most critical issue is whether the quality of oil leakage, because the door closer is to rely on its internal hydraulic system fluid of throttling to control the process of closing, leaking oil means failure of hydraulic systems, hydraulic system is to determine the service life of the door closer the sole criterion.

Oil leakage main reason is the small gear wear and bearing guide parts so that the gap increases, seal and sealing effect caused by wear and tear down or when the buffer effects in regulating throttle valve core counterclockwise to leave the body.

Door closer buffering effect of the decrease is due to oil spills caused air entry or rack piston-cylinder and the valve between the tie (throttle) clearance increase. Therefore, small gear, bearing guiding piece of material, heat treatment and machining quality and accuracy is very important.

For buffering effect of door closer, simply by adjusting the throttle valve core to throttle is unable to solve the problem. Must pass through the maintenance of the way, if you are supporting oriented parts department oil spills, remove the bearing Guide, check the seal of the State of wear or aging, replace the sealing ring. If the supporting guidance and pinion shaft excessive clearance between bearing steering parts, replace. If the rack piston-cylinder wear, and the valve clearance between increases result in decreased throttle effect, you can remove the rack chromed piston, used to repair. Also, ensure the door closer cushioning effect, use the soft spring, but also reduce buffering effect of the variation of the back door to door frame of impact forces.

1 definitions

Installed in side-hinged door in the upper, one-way door leaf, often use the temperature from-15 ~ 40 ℃, the metal springs, hydraulic damping combinations of device. Selection should be based on the door leaf width and weight, using frequency requirements.

2 standard

QB/T2698-200 the door closer "

3 classification

3.1 American standard door closer

3.2-standard door closer

3.3 China standard door closer

4 the system configuration, performance, features, scope of application and reference price

Since the different testing methods, ANSI, en, GB, door closer is the opening times.

4.1 American standard door closer

1) upscale American standard door closer

Reach 200 million times on life test. Meet United States ANSI156 level requirements. With adjustable features.

Ideal for high-security, the use of frequencies for public architecture, engineering and maintenance doors with heavy duty high strength door control system.

2) mid-range American standard door closer

Non-fire door door closer to 100 million times on life test. With adjustable features.

Suitable for higher security, use the higher frequency of high-intensity residential door and medium intensity commercial door door control system.

4.2-standard door closer

1) high-grade-standard door closer

More than 50 million times, meet EN1154 lifetime testing requirements. With adjustable features.

Ideal for high-security, the use of frequencies for public architecture, engineering and maintenance doors with heavy duty high strength door control system.

2) medium-standard door closer

30 million more life test, meet the requirements of EN1154. With adjustable features.

Suitable for higher security, use the higher frequency of high-intensity residential door and medium intensity commercial door door control system.

4.3 China standard door closer

More than 50 million times life test.

Apply to have the security requirements, use frequency low external doors.