山東電纜橋架的連接需確保電氣連續性、結構穩定性和線纜保護功能，其連接方式根據橋架類型、規格及安裝需求有所不同。以下是常見的連接方法及注意事項：

　　The connection of Shandong cable tray needs to ensure electrical continuity, structural stability, and cable protection function. The connection method varies depending on the type, specifications, and installation requirements of the tray. The following are common connection methods and precautions:

　　一、基本連接方式

　　1、 Basic connection method

　　1. 直線段連接（直接連接）

　　1. Straight line segment connection (direct connection)

　　適用場景：同規格、同型號橋架的直線延長連接。

　　Applicable scenario: Straight extension connection of cable trays of the same specifications and models.

　　連接步驟：

　　Connection steps:

　　使用連接板：在橋架連接處放置與橋架材質匹配的金屬連接板（通常為配套配件），連接板覆蓋橋架兩側的端頭。

　　Use connection plates: Place metal connection plates (usually matching accessories) that match the material of the bridge at the connection point, and cover the ends on both sides of the bridge.

　　螺栓固定：用鍍鋅螺栓或不銹鋼螺栓穿過連接板和橋架的預制螺孔，從橋架內側向外側穿入（避免螺栓頭刮傷電纜），并擰緊螺母固定。

　　Bolt fixation: Use galvanized bolts or stainless steel bolts to pass through the prefabricated screw holes of the connecting plate and bridge, and insert from the inside to the outside of the bridge (to avoid scratching the cable with the bolt head), and tighten the nut for fixation.

　　跨接接地：若為鋼制橋架，需在連接板兩側用編織銅帶或鍍鋅跨接線連接，確保橋架整體接地導通（螺栓連接處需去除絕緣層或涂層）。

　　Cross grounding: If it is a steel bridge frame, braided copper strips or galvanized jumper wires should be used on both sides of the connecting plate to ensure the overall grounding and conductivity of the bridge frame (the insulation layer or coating should be removed at the bolted connection).

　　2. 彎頭 / 三通 / 四通連接

　　2. Elbow/tee/four-way connection

　　適用場景：橋架轉向（90° 彎頭）、分支（三通、四通）時的連接。

　　Applicable scenarios: Connection during bridge turning (90 ° bend) and branching (tee, four-way).

　　連接步驟：

　　Connection steps:

　　配件匹配：選擇與橋架規格一致的彎頭、三通、四通配件，確保接口尺寸吻合。

　　Accessory matching: Select elbow, tee, and four-way accessories that match the specifications of the bridge, ensuring that the interface dimensions match.

　　螺栓固定：將配件與主橋架的端頭對齊，通過連接板和螺栓固定（方式同直線段連接），確保連接處平整無錯位。

　　Bolt fixation: Align the accessories with the end of the main bridge frame, and fix them with connecting plates and bolts (in the same way as connecting straight sections) to ensure that the connection is flat and not misaligned.

　　弧度處理：彎頭內側需平滑過渡，避免電纜彎曲時受擠壓（電纜彎曲半徑需符合規范）。

　　Arc processing: The inner side of the elbow should have a smooth transition to avoid compression when the cable is bent (the bending radius of the cable should comply with the specifications).

　　3. 變徑連接（大小頭連接）

　　3. Variable diameter connection (size head connection)

　　適用場景：不同規格橋架（如寬度或高度變化）的過渡連接。

　　Applicable scenarios: Transition connections for bridge frames of different specifications (such as width or height variations).

　　連接步驟：

　　Connection steps:

　　使用變徑板：采用變徑接頭（又稱 “大小頭”），一端與大規格橋架連接，另一端與小規格橋架連接。

　　Using a variable diameter plate: Using a variable diameter joint (also known as a "big small head"), one end is connected to a large-sized bridge and the other end is connected to a small-sized bridge.

　　錯位固定：將變徑板的兩端分別插入主橋架和分支橋架的端頭，用螺栓從內側固定，確保變徑處平滑過渡，無尖銳邊緣。

　　Misalignment fixation: Insert the two ends of the variable diameter plate into the ends of the main bridge and branch bridge respectively, and fix them from the inside with bolts to ensure a smooth transition at the variable diameter without sharp edges.

　　4. 伸縮縫連接

　　4. Expansion joint connection

　　適用場景：橋架跨越建筑伸縮縫、沉降縫或長距離直線段（需預留熱脹冷縮空間）。

　　Applicable scenarios: Bridge spans building expansion joints, settlement joints, or long-distance straight sections (with reserved space for thermal expansion and contraction).

　　連接步驟：

　　Connection steps:

　　預留間隙：在伸縮縫兩側的橋架間預留10~15mm 間隙，避免因建筑結構變形導致橋架受損。

　　Reserved gap: Reserve 10-15mm gap between the bridge frames on both sides of the expansion joint to avoid damage to the bridge frames due to structural deformation of the building.

　　柔性連接：間隙處用金屬軟連接片（如波紋板）或橡膠伸縮節連接，同時用跨接線確保接地連續性。

　　Flexible connection: Metal flexible connectors (such as corrugated plates) or rubber expansion joints are used to connect gaps, and jumper wires are used to ensure grounding continuity.

　　支架固定：伸縮縫兩側的橋架需單獨固定支架，避免橋架整體位移。

　　Bracket fixation: The bridge frames on both sides of the expansion joint need to be separately fixed with brackets to avoid overall displacement of the bridge frames.

　　二、接地與電氣連通

　　2、 Grounding and electrical connection

　　跨接接地要求

　　Cross grounding requirements

　　橋架系統需形成完整的接地通路，通常通過連接板的螺栓連接實現電氣導通。若螺栓連接處有絕緣涂層（如噴塑橋架），需刮除涂層或使用爪型墊片刺破涂層。

　　The bridge system needs to form a complete grounding path, usually achieved through bolted connections of connecting plates to achieve electrical conductivity. If there is insulation coating at the bolted connection (such as spray painted bridge), it is necessary to scrape off the coating or use claw type washers to puncture the coating.

　　對于長距離橋架（超過 30m），需按規范與接地干線連接（如每隔 30m 接入一次接地系統）。

　　For long-distance cable trays (exceeding 30m), they must be connected to the grounding main line according to regulations (such as connecting the grounding system every 30m).

　　不同材質處理

　　Different material treatments

　　鋼制橋架：跨接線可用鍍鋅圓鋼或編織銅帶，螺栓連接后需做防腐處理（如涂防銹漆）。

　　Steel bridge frame: Galvanized round steel or braided copper strip can be used for jumper wires, and anti-corrosion treatment (such as coating with anti rust paint) is required after bolt connection.

　　鋁合金橋架：需用鋁合金跨接件或不銹鋼螺栓，避免不同金屬接觸產生電化學腐蝕。

　　Aluminum alloy bridge frame: Aluminum alloy jumper fittings or stainless steel bolts are required to avoid electrochemical corrosion caused by contact between different metals.

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