quality Metal Cable Tray & Fireproof Cable Tray factory

1、 Laying distance When wiring the cable tray, attention should be paid to laying the cables inside the tray vertically at intervals of 1.50-2m above its upper end; When laying horizontally, the first and last ends of the cable, turns, and every 5-10m. When several sets of cable trays are laid in parallel at the same height, protection and maintenance intervals should be considered between adjacent cable trays. When laying cable trays horizontally, the height from the ground should generally not be less than 2.50m. For vertical equipment, metal covers should be added to protect the parts below 1.80m from the ground, but when laying in electrical dedicated rooms (such as distribution rooms, electrical shafts, technical floors, etc.), they should be outside. When laying cable trays horizontally, it is advisable to select the optimal span according to the load curve for support. The span is generally   1.5-3m, and the largest can also be made into a large-span tray of 8m. In addition, when laying vertically, the spacing between fixed points should not be greater than 2m. Cables can be laid without gaps on the cable tray, and the filling rate of the cable in the cross section of the tray should not exceed 40% for power cables; The control cable should not be larger than half of itself. When the cable tray is parallel or intersecting with various pipelines, its minimum clear distance should comply with relevant national regulations. 2、 Abnormal cables or voltages cannot be laid on the same layer of cable tray If there are cables with abnormal voltages above 1kV and below 1kV, dual power cables with the same path supplying power to the first level load, cables with abnormal uses for emergency lighting and other lighting, or strong and weak current cables, they should not be laid on the same layer of bridge. If the equipment is constrained by conditions and needs to be placed on the same layer of bridge, a partition should be used to isolate it. 3、 Protective methods When selecting cable trays for indoor wiring, the cables should not have an outer protective layer of jute or other flammable materials; When selecting cable trays for wiring in areas with corrosion or rare humidity, corresponding protective methods should be adopted based on the abnormalities of the corrosive medium. If the tray is selected as a hot-dip galvanized tray with strong corrosion resistance, it is best to use plastic sheathed cables. Cable trays cannot be installed above corrosive gas and thermal pipelines or below corrosive liquid pipelines. If conditions are limited, anti-corrosion and insulation methods must be used.

When the cable tray undergoes deformation, the bearing capacity of the bridge shall not exceed the value obtained by dividing the load by a factor of 1.5. Under the allowable uniform load, the relative deflection value of the ladder and tray should not exceed 1/200 of the steel; Aluminum alloy should not exceed 1/300. The ratio of deflection to arm length of the steel support arm under allowable load should not exceed 1/100. 6.2.   When the height of the fireproof cable tray is 50 or 100, there are 6 connection holes at both ends; When the bridge height is 150 and 200, there are 12 connection holes at both ends. According to personnel related to cable trays in Hebei Province, fire barriers can be installed during construction, and specific measures need to be taken. The cables on both sides of the firewall are densely separated and wrapped. This fireproof bridge has the characteristics of fire resistance, fire resistance, oil resistance, corrosion resistance, and easy overall installation.   Composite steel axial flow fan FZ40/35 grade composite steel axial flow fan, CDZ convenient ultra-low noise composite steel axial flow fan, DFBZ circular wall SF steel new axial flow fan, SF convenient new low noise composite steel axial flow fan, GD30K2-12 composite steel axial flow fan, WEXD composite steel side wall fan.   Modern fireproof galvanized cable tray is a true new bridge and the second-generation core of cable tray. Do you know the requirements for cable trays now? Determine the position of the defense line → Embed expansion bolts or iron parts → Install brackets, hangers, and brackets → Install cable trays → Install protective grounding wires.

Timely maintenance of cable trays is necessary. It is necessary to inspect and repair cable trays on time to see if their overall structure is stable. In actual use, attention should also be paid to their movement shape at all times. This is because there are various irresistible factors outside, which will cause the tray to function improperly. If there is a problem with the cable tray, it will not only cause problems in the power transmission process, It will directly threaten the safety of the surrounding population. Simple cleaning work also needs to be carried out by us. When inspecting the cable tray, the electric ball valve can be cleaned to ensure the cleanliness and cleanliness of the tray at any time. Maintaining the surrounding environment not only ensures its service life from corrosion by other objects, but also ensures its beautiful appearance. Pay attention to the working environment of the cable tray and the inspection of its components, so in order to ensure its normal operation, it is necessary to conduct timely inspection and repair of these components. The maintenance items of the bridge, the operation of the balance cylinder of the bridge equipment, and the smooth oil system, oil circuits, joints, etc., have been tested and checked. There are frequent conflicts between the bridge equipment slider and the guide rail, and necessary adjustments should be made to correct them. The smoothness of the joints and pipelines should be checked to ensure good operation. Regularly ensure that the gear parts of the bridge equipment are smooth: the possibility of damage to the gear transmission box and internal components due to frequent operation is higher, and the possibility of looseness is greater. When there is noise in these parts, it can be smoothed first, and then based on the vibration situation, the oil discharge volume and pressure test of the oil injection points between the systems can be checked, and appropriate adjustments can be made.

Starting from the perspective of sustainable development, it is advisable to reserve more than 10 cable channels within the bridge. On the basis of satisfying the cross-sectional requirements for cable arrangement, the selection of general steel structure trusses for cable trays with spans of 30m and 40m can meet the requirements for bearing capacity and stiffness. It is recommended to use a prestressed steel truss structure system for cable trays with a span of more than 40m, which can reduce the height of the truss section. The working condition that controls the load-bearing capacity of the truss is the combination of dead load and live load. Therefore, for simply supported prestressed steel trusses, the use of double line prestressed arrangement method has a better effect. Afterwards, some suggestions for standardized creation were proposed.   With the rapid growth of the national economy, the demand for power supply in various regions has further advanced. However, due to the large-scale development of land, it is often difficult to select the transmission line route, and high-voltage power cables often cross rivers. When crossing wide rivers, cable tray structures are commonly used, with concrete aqueducts and steel structure trays being common. The concrete aqueduct bridge scheme requires the installation of formwork on the river surface, pouring of trench concrete, and protection and shaping. Its defects are that the formwork is difficult to support, the construction period is long, and the construction difficulty is relatively high. If constructed on the waterway, it will affect navigation for a long time, which is greatly affected by the season and local shipping and transportation conditions. Nowadays, the planning and construction technology of steel structures is becoming increasingly advanced. The use of steel structure bridges can directly cross large spans without the need for supporting points in the middle of the river, and the construction speed is fast.   The snow load is considered to be a maximum of 0.65kN/m2 with a 50 year return period in Jiangsu Province (Nanjing City); Earthquake effect: The seismic effect is considered based on two conditions: 7 degrees (0.10g) and 8 degrees (0.2g). The first group of planned earthquake groups is selected, and the site soil category is Class III site soil. 8 degrees (0.3g) only appear in Sucheng and Suyu in Suqian. Based on practical experience, a detailed analysis of the situation will be conducted. At 7 degrees, only the impact of horizontal seismic effects is considered, while at 8 degrees, the vertical seismic effects of steep water should be considered together.

Long span cable trays are primarily used in cable laying projects, and their application can ensure that cables are not damaged. As a cable tray manufacturer, we are reminded that if we want to use large-span cable trays for a long time, it is necessary to regularly maintain them. The maintenance of large span cable trays is nothing more than cleaning and maintenance. When cleaning the cable rack, use a pure soft cloth to quietly remove the external dust. Remember not to scrub with damp cloth and acidic chemicals to avoid corrosion of cable trays or causing electric shock. Ash removal is only a shallow maintenance method. If you want to deeply protect the cable tray, you can use light wax. Due to the material of the large-span cable tray, after long-term use, the appearance may not be as bright as before. At this point, the wax can be applied. Firstly, clean the surface dust, then apply light wax to the surface of the bridge, air dry, and then sun dry. The use of lightweight wax not only ensures the bright luster of cable trays, but also improves their antioxidant capacity.

  When purchasing cable trays, the following points should be noted: (1) Reasonable selection of cable tray structure: Based on different wiring systems, the structure should be reasonably selected when selecting cable trays to meet the needs of different wiring systems.   (2) Appropriately estimating load: When selecting cable trays, it is necessary to make a reasonable estimation based on the expected load to ensure that the product meets actual needs.   (3) Pay attention to safety: During the installation and use of metal cable trays, attention should be paid to safety to avoid injuries to personnel and equipment during use.   (4) Strictly control costs: When selecting metal cable trays, cost should be effectively controlled according to actual needs and budget should be reasonably saved.

  (1) Structural advantage: Cable trays can be cut and installed according to different requirements, suitable for various application environments and scenarios. (2) High strength bearing capacity: Metal cable trays are made of high-quality materials and have excellent strength, which can carry various types of wiring systems and equipment. (3) Good ventilation: The special design of metal cable trays ensures good ventilation performance while preventing cable overheating.   (4) Corrosion resistance: Surface treatment processes such as hot-dip galvanizing make metal cable tray products corrosion-resistant and can be used for a long time.   (5) Beautiful appearance: The metal cable tray adopts a beautiful appearance design, which can integrate with industrial and commercial environments, making the entire system design beautiful and practical.