在(zai)化工行業中，橋(qiao)架的(de)使(shi)用關重(zhong)要(yao)，它(ta)不(bu)僅(jin)承(cheng)載著各(ge)種(zhong)電纜，更在(zai)與(yu)效率(lv)方面(mian)發揮著關(guan)鍵(jian)作(zuo)用。許(xu)多(duo)人(ren)在(zai)設計(ji)和(he)施工過(guo)程(cheng)中，會遇(yu)到(dao)壹個常見(jian)的(de)問(wen)題：橋架(jia)是否需要(yao)跨接？這(zhe)個(ge)看似簡單的(de)問(wen)題，實際(ji)上與(yu)設備(bei)的(de)性、系統的(de)穩定(ding)性以及運行的可(ke)靠性息息相(xiang)關(guan)。

　　In the chemical industry, the use of cable trays is crucial. They not only carry various cables, but also play a key role in safety and efficiency. Many people encounter a common question during the design and construction process: does the bridge need to be bridged? This seemingly simple question is actually closely related to the safety of the equipment, the stability of the system, and the reliability of operation.

　　Q：橋架(jia)需要(yao)跨接嗎

　　Q: Do cable trays need to be bridged

　　需要(yao)，但可(ke)以通(tong)過(guo)防松螺帽或(huo)防松墊(dian)圈。當(dang)采(cai)用鍍(du)鋅(xin)電纜橋架時，可(ke)通(tong)過(guo)防松螺帽或(huo)防松墊(dian)圈的連接來(lai)實現(xian)橋(qiao)架(jia)跨接(jie)，對於不(bu)銹(xiu)鋼和(he)鋁合(he)金材(cai)質電纜橋架，則應(ying)采(cai)用專(zhuan)用的接地螺栓(shuan)孔(kong)進行接地跨接采(cai)購橋架時，為方便施工，建(jian)議要(yao)求(qiu)廠家(jia)配套(tao)的(de)連接片的(de)螺栓(shuan)為防松螺母(mu)，不(bu)建(jian)議采(cai)用防松墊(dian)圈。

　　Yes, but it can be done with a locking nut or a locking washer. When using galvanized cable trays, bridge bridging can be achieved through the connection of anti loosening nuts or anti loosening washers. For stainless steel and aluminum alloy cable trays, dedicated grounding bolt holes should be used for grounding bridging. When purchasing cable trays, for the convenience of construction, it is recommended to require the bolts of the connecting pieces provided by the manufacturer to be anti loosening nuts, and it is not recommended to use anti loosening washers.

　　01

　　01

　　規範依(yi)據(ju)

　　normative basis

　　1）SH/T 3164-2021石(shi)油(you)化工儀表系統防雷(lei)設計(ji)規(gui)範10.2.10 金屬(shu)電纜槽板之間(jian)的(de)連接件應(ying)采(cai)用少兩(liang)組帶有防松墊(dian)片的(de)鍍(du)鋅(xin)鋼螺栓(shuan)直(zhi)接壓(ya)接(jie)，實(shi)現(xian)導(dao)電連接，或(huo)采(cai)用壓(ya)接(jie)鍍(du)錫銅(tong)連接片的(de)絕緣(yuan)多(duo)股(gu)銅(tong)線跨接，銅(tong)線截(jie)面(mian)積應(ying)≥4.0mm2。6.5.1 接地導(dao)線應(ying)采(cai)用壓(ya)接(jie)方式；導(dao)線端(duan)應(ying)采(cai)用銅(tong)或鍍(du)錫銅(tong)連接片壓(ya)接(jie)，所(suo)有采(cai)用壓(ya)接(jie)方式的連接點(dian)均應(ying)采(cai)用帶有防松墊(dian)片的(de)鍍(du)鋅(xin)鋼螺栓(shuan)壓(ya)緊(jin)固定(ding)，實(shi)現(xian)導(dao)電連接。同(tong)壹壓(ya)接(jie)點(dian)的(de)壓(ya)接(jie)導(dao)線不(bu)應(ying)多(duo)於兩(liang)條。

　　1) SH/T 3164-2021 Design Specification for Lightning Protection of Petrochemical Instrumentation Systems 10.2.10 The connectors between metal cable trays should be directly crimped with at least two sets of galvanized steel bolts with anti loosening gaskets to achieve conductive connection, or insulated multi strand copper wires with crimped tinned copper connectors should be used for cross connection. The cross-sectional area of the copper wire should be ≥ 4.0mm2. 6.5.1 The grounding wire should be crimped; The wire ends should be crimped with copper or tin plated copper connectors, and all connection points using crimping methods should be secured with galvanized steel bolts with anti loosening washers to achieve conductive connections. There should not be more than two crimping wires at the same crimping point.

　　2）SH/T 3569-2020 石(shi)油(you)化工電纜橋架施工及驗(yan)收規(gui)範8.2.3 鍍(du)鋅(xin)電纜橋架間(jian)連接板的兩(liang)端(duan)可(ke)不(bu)作(zuo)接地跨接，墊(dian)圈的連接固定(ding)螺栓(shuan)。但(dan)連接板每端(duan)應(ying)不(bu)少(shao)於2個(ge)有防松螺帽或(huo)防松墊(dian)圈的連接固定(ding)螺栓(shuan)。8.2.4 不(bu)銹(xiu)鋼和(he)鋁合(he)金材(cai)質的電纜橋架連接處應(ying)使用專(zhuan)用的接地螺栓(shuan)孔(kong)進行接地跨接，不(bu)應(ying)采(cai)用橋架連接板固定(ding)螺栓(shuan)孔(kong)，跨接導(dao)線的截(jie)面(mian)積應(ying)符合(he)設計(ji)文(wen)件要(yao)。

　　2) SH/T 3569-2020 Construction and Acceptance Specification for Petrochemical Cable Trays 8.2.3 The two ends of the connecting plate between galvanized cable trays may not need to be grounded and the fixing bolts for the gasket connection. But each end of the connecting plate should have at least 2 fixing bolts with anti loosening nuts or anti loosening washers. 8.2.4 Special grounding bolt holes should be used for grounding bridging at the connection points of stainless steel and aluminum alloy cable trays. Cable tray connection plates should not be used to fix bolt holes, and the cross-sectional area of the bridging wires should comply with the design documents.

　　3）GB 50169-2016 電氣裝置(zhi)安(an)裝工程接地裝置(zhi)施工及驗(yan)收規(gui)範4.3.9 金屬(shu)電纜橋架的接(jie)地應(ying)符合(he)下(xia)列(lie)規(gui)定(ding)：1 宜(yi)在(zai)電纜橋架的支(zhi)吊(diao)架(jia)上(shang)焊(han)接螺栓(shuan)，和(he)電纜橋架主(zhu)體(ti)采(cai)用兩(liang)端(duan)壓(ya)接(jie)銅(tong)鼻子(zi)的銅(tong)絞線跨接，跨接(jie)線小截(jie)面(mian)積不(bu)應(ying)小4mm2。2 電纜橋架的鍍(du)缽支(zhi)吊(diao)架和(he)鍍(du)辭電纜橋架之間(jian)無(wu)跨接(jie)地線時，其間(jian)的(de)連接處應(ying)有不(bu)少(shao)於2個(ge)帶(dai)有防松螺帽或(huo)防松墊(dian)圈的螺栓(shuan)固定(ding)。

　　3) GB 50169-2016 Code for Construction and Acceptance of Grounding Devices in Electrical Equipment Installation Engineering 4.3.9 The grounding of metal cable trays should comply with the following regulations: 1. It is recommended to weld bolts on the supports and hangers of cable trays, and use copper stranded wires with copper noses pressed at both ends to cross the cable tray body. The minimum cross-sectional area of the cross wire should not be less than 4mm2. When there is no grounding wire between the plating bowl support hanger of the cable tray and the plating groove cable tray, there should be no less than 2 bolts with anti loosening nuts or anti loosening washers fixed at the connection between them.

　　4）也(ye)可(ke)以參(can)考(kao)其他(ta)規範，如

　　4) You can also refer to other standards, such as

　　GB 50303-2015 建(jian)築(zhu)電氣工程施工質量(liang)驗(yan)收規(gui)範中

　　GB 50303-2015 Code for Acceptance of Construction Quality of Building Electrical Engineering

　　11.1.1金屬(shu)梯架、托盤(pan)或(huo)槽盒本體(ti)之間(jian)的(de)連接應(ying)牢固可(ke)靠，與(yu)保(bao)護導(dao)體(ti)的連接應(ying)符合(he)下(xia)列(lie)規(gui)定(ding)：

　　11.1.1 The connection between metal ladder frames, trays or trough boxes should be firm and reliable, and the connection with protective conductors should comply with the following regulations:

　　1 梯(ti)架、托盤(pan)和(he)槽盒全(quan)長(chang)不(bu)大(da)於30m時，不(bu)應(ying)少於2處與(yu)保(bao)護導(dao)體(ti)可(ke)靠連接；全(quan)長(chang)大(da)於30m時，每隔20m～30m應(ying)增(zeng)加(jia)壹(yi)個(ge)連接點(dian)，起(qi)始(shi)端(duan)和(he)終(zhong)點端(duan)均應(ying)可(ke)靠接(jie)地。

　　When the total length of the ladder frame, pallet, and trough box is not more than 30m, there should be no less than 2 reliable connections with the protective conductor; When the total length is greater than 30m, a connection point should be added every 20m to 30m, and both the starting and ending ends should be reliably grounded.

　　2 非鍍(du)鋅(xin)梯架(jia)、托盤(pan)和(he)槽盒本體(ti)之間(jian)連接板的兩(liang)端(duan)應(ying)跨接(jie)保(bao)護聯結(jie)導(dao)體(ti)，保(bao)護聯結(jie)導(dao)體(ti)的截(jie)面(mian)積應(ying)符合(he)設計(ji)要(yao)求(qiu)。

　　The two ends of the connecting plate between the non galvanized ladder frame, tray, and trough box body should be bridged with protective connecting conductors, and the cross-sectional area of the protective connecting conductors should meet the design requirements.

　　3 鍍(du)鋅(xin)梯架(jia)、托盤(pan)和(he)槽盒本體(ti)之間(jian)不(bu)跨(kua)接保(bao)護聯結(jie)導(dao)體(ti)時，連接板每端(duan)不(bu)應(ying)少於2個(ge)有防松螺帽或(huo)防松墊(dian)圈的連接固定(ding)螺栓(shuan)。

　　When the galvanized ladder frame, tray, and trough box body do not cross connect the protective connecting conductor, there should be no less than 2 connection fixing bolts with anti loosening nuts or anti loosening washers at each end of the connecting plate.

　　GB 55024-2022 建(jian)築(zhu)電氣與(yu)智能(neng)化通(tong)用規範

　　GB 55024-2022 General Code for Electrical and Intelligent Construction of Buildings

　　8.7.1電纜橋架本體(ti)之間(jian)的(de)連接應(ying)牢固可(ke)靠，金屬(shu)電纜橋架與(yu)保(bao)護導(dao)體(ti)的連接應(ying)符合(he)下(xia)列(lie)規(gui)定(ding)：

　　8.7.1 The connection between cable trays should be firm and reliable, and the connection between metal cable trays and protective conductors should comply with the following regulations:

　　1 電纜橋架全(quan)長(chang)不(bu)大(da)於30m時，不(bu)應(ying)少於2處與(yu)保(bao)護導(dao)體(ti)可(ke)靠連接；全(quan)長(chang)大(da)於30m時，每隔 20m～30m應(ying)增(zeng)加(jia)壹(yi)個(ge)連接點(dian)，起(qi)始(shi)端(duan)和(he)終(zhong)點端(duan)均應(ying)可(ke)靠接(jie)地；

　　When the total length of the cable tray is not more than 30m, there should be no less than 2 reliable connections with the protective conductor; When the total length is greater than 30m, a connection point should be added every 20m to 30m, and both the starting and ending ends should be reliably grounded;

　　2 非鍍(du)鋅(xin)電纜橋架本體(ti)之間(jian)連接板的兩(liang)端(duan)應(ying)跨接(jie)保(bao)護聯結(jie)導(dao)體(ti)，保(bao)護聯結(jie)導(dao)體(ti)的截(jie)面(mian)面(mian)積應(ying)符合(he)設計(ji)要(yao)求(qiu)；

　　The two ends of the connecting plate between the non galvanized cable tray bodies should be bridged with protective connecting conductors, and the cross-sectional area of the protective connecting conductors should meet the design requirements;

　　3 鍍(du)鋅(xin)電纜橋架本體(ti)之間(jian)不(bu)跨(kua)接保(bao)護聯結(jie)導(dao)體(ti)時，連接板每端(duan)不(bu)應(ying)少於2個(ge)有防松螺帽或(huo)防松墊(dian)圈的連接固定(ding)螺栓(shuan)。

　　When the galvanized cable tray body does not cross connect the protective connecting conductor, there should be no less than 2 connection fixing bolts with anti loosening nuts or anti loosening washers at each end of the connecting plate.

　　02看(kan)圖說(shuo)話

　　02 Talking about Pictures

　　圖(tu)1 跨(kua)接線做法(fa)圖2 跨(kua)接線做法(fa)上述圖片的(de)問(wen)題如下(xia)：①圖1采(cai)用的是非防松螺母(mu)，雖(sui)然采(cai)用專(zhuan)用接地螺栓(shuan)孔(kong)，但跨接線為螺旋(xuan)狀(zhuang)不(bu)符(fu)合(he)規範要(yao)求(qiu)（ SH/T 3081中6.2.2 接(jie)地線應(ying)盡可(ke)能(neng)短，並(bing)宜(yi)按直線路徑敷設，不(bu)應(ying)將(jiang)接(jie)地線繞成(cheng)螺線管(guan)狀或(huo)盤成(cheng)環狀(zhuang)）。②圖2，如(ru)果(guo)不(bu)是防松螺母(mu)或(huo)者未(wei)采(cai)用防松墊(dian)圈，這(zhe)種(zhong)做法(fa)是錯(cuo)誤(wu)的(de)；如(ru)果(guo)是防松螺母(mu)或(huo)者防松墊(dian)圈，圖2跨接做(zuo)法(fa)就是畫蛇(she)添(tian)足。註：防松螺母(mu)、自(zi)緊(jin)螺母(mu)是壹種(zhong)常見(jian)的(de)緊(jin)固防松螺母(mu)。包(bao)括機(ji)械(xie)防松、鉚(mao)沖防松、摩擦(ca)防松、構造(zao)防松等(deng)。

　　The problem with the above picture is as follows: ① Figure 1 uses a non loosening nut, although a dedicated grounding bolt hole is used, the jumper wire is in a spiral shape, which does not meet the specification requirements (SH/T 3081 6.2.2 Grounding wire should be as short as possible and should be laid in a straight path, and should not be wound into a spiral tube or coiled into a ring shape). ② Figure 2, if it is not a lock nut or a lock washer is not used, this approach is incorrect; If it is a lock nut or lock washer, the cross connection method in Figure 2 is just adding unnecessary details. Note: Anti loosening nuts and self tightening nuts are common types of fastening anti loosening nuts. Including mechanical anti loosening, riveting anti loosening, friction anti loosening, structural anti loosening, etc.

　　本文由(you) 濟南電纜橋架  友情(qing)奉(feng)獻.更多(duo)有關(guan)的知(zhi)識請(qing)點擊  http://wdyvw.cn//  真(zhen)誠的態(tai)度(du).為您(nin)提(ti)供(gong)為的服務(wu).更多(duo)有關(guan)的知(zhi)識我(wo)們將(jiang)會陸續向(xiang)大(da)家(jia)奉(feng)獻.敬請(qing)期待(dai).

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