Fire avoidance device for welding of cable conduit

Abstract

The utility model relates to the technical field of bridge construction facilities, and in particular to a fire avoidance device for welding of a cable conduit. The fire avoidance device comprises: a protective sleeve and a connecting structure, wherein the first end of the protective sleeve is sleeved inside the cable conduit, the second end of the protective sleeve is connected to the cable through the connecting structure, and the outer surface of the protective sleeve is provided with a fire-resistant protective layer. The fire avoidance device provided by the utility model has a simple structure and is easy to install, and can be widely used in replacement projects of various types of cable conduits.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction facilities, in particular to a fire avoidance device used for welding of inclined cable conduits. Background Art

[0002] Cable-stayed bridges have the advantages of large span capacity, low material consumption, simple construction and beautiful appearance. They have been widely and rapidly applied and developed in bridge construction at home and abroad. The cable system of a cable-stayed bridge is a crucial component of its structure and is responsible for bearing the main bridge load. However, as time goes by, due to the influence of environmental and traffic factors during the actual operation period, the performance of the cable will significantly decline. In order to ensure the operational safety of the bridge structure, the cable needs to be replaced when necessary.

[0003] Due to long-term load, the axis of some inclined cables and the axis of the main beam cable guide have an angle deviation. During the replacement of the inclined cables, the cable guide needs to be cut and welded. The high-temperature welding slag generated during the welding process will damage the PE protective film of the inclined cables, causing irreversible damage. Therefore, it is necessary to design a device that can prevent the welding slag from damaging the inclined cables. Utility Model Content

[0004] The utility model aims to provide a fire avoidance device for welding of a cable conduit, so as to alleviate the problem that the PE protective film of the cable is damaged by high-temperature welding slag generated during the cutting and welding of the cable conduit.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] A fire avoidance device for welding a cable conduit comprises: a protective sleeve and a connecting structure, wherein the first end of the protective sleeve is sleeved inside the cable conduit, the second end of the protective sleeve is connected to the cable through the connecting structure, and the outer surface of the protective sleeve is provided with a fire-resistant protective layer.

[0007] Furthermore, it also includes asbestos cloth wrapped around the outer surface of the inclined cable, and the asbestos cloth is arranged flush with the fire-resistant protective layer.

[0008] Furthermore, the connection structure includes a clamp, which is installed at the end of the inclined cable, and one end of the clamp away from the inclined cable is connected to the protective sleeve.

[0009] Furthermore, a rubber pad is provided between the clamp and the inclined cable.

[0010] Furthermore, a first fixing ear plate and a second fixing ear plate are welded on the clamp, the first fixing ear plate and the second fixing ear plate are arranged opposite to each other, and both extend outward from the outer end surface of the clamp.

[0011] Furthermore, the first fixing ear plate and the second fixing ear plate are both provided with a plurality of bolt holes.

[0012] Furthermore, a connecting ear plate is welded on the clamp, and the bottom of the connecting ear plate is connected to the fire-resistant protective layer.

[0013] Furthermore, the protective sleeve, the clamp and the rubber pad are each provided with two groups, and the two groups are connected by a connecting piece.

[0014] Furthermore, the connecting member is penetrated through the corresponding bolt holes on the two groups of the first fixing ear plates and the corresponding bolt holes on the two groups of the second fixing ear plates.

[0015] Furthermore, the protective sleeve is made of high temperature resistant and wear resistant material.

[0016] The utility model brings at least the following beneficial effects:

[0017] The utility model provides a fire avoidance device for welding of inclined cable conduits, comprising: a protective sleeve and a connecting structure, wherein the first end of the protective sleeve is sleeved inside the cable conduit, the second end of the protective sleeve is connected to the inclined cable through the connecting structure, and the outer surface of the protective sleeve is provided with a fire-resistant protective layer.

[0018] The protective sleeve is connected between the cable guide and the inclined cable, which can effectively prevent high-temperature welding slag from directly contacting the PE protective film of the inclined cable, providing an efficient protection mechanism. The outer surface of the protective sleeve is provided with a fire-resistant protective layer, which can ensure that the protective sleeve will not fail due to high temperature during the welding process, thereby extending the service life of the fire avoidance device. In addition, the fire avoidance device can be adjusted in size as needed, and can flexibly adapt to different processes and welding conditions. It has a simple structure and is easy to disassemble and assemble. It can be widely used in replacement projects of various types of inclined cables, avoiding damage to the inclined cables caused by welding slag.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of the fire avoidance device for welding of a stay cable conduit provided by an embodiment of the utility model when in use;

[0022] Figure 2 A schematic structural diagram of a fire avoidance device for welding a stay cable conduit provided in an embodiment of the utility model;

[0023] Figure 3 A cross-sectional view of a fire avoidance device for welding a stay cable conduit provided in an embodiment of the utility model.

[0024] icon:

[0025] 100-protective sleeve; 200-connecting structure; 210-hoop; 220-rubber pad; 230-first fixed ear plate; 240-second fixed ear plate; 250-bolt hole; 260-connecting ear plate; 300-cable guide tube; 400-stayed cable; 500-asbestos cloth. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0029] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The following is a detailed description of some embodiments of the present invention in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Figure 1 A schematic diagram of the fire avoidance device for welding of a stay cable conduit provided by an embodiment of the utility model when in use; Figure 2 A schematic structural diagram of a fire avoidance device for welding a stay cable conduit provided in an embodiment of the utility model; Figure 3 A cross-sectional view of a fire avoidance device for welding a stay cable conduit provided in an embodiment of the utility model.

[0032] Embodiment 1

[0033] As time goes by, due to the influence of environmental and traffic factors during the actual operation period, the performance of the cable will decline significantly. In order to ensure the operational safety of the bridge structure, the cable needs to be replaced when necessary. Due to long-term load, there is an angle deviation between the axis of some cables and the axis of the main beam cable guide. During the replacement of the cable, the cable guide needs to be cut and welded. The high-temperature welding slag generated during the welding process will damage the PE protective film of the cable, causing irreversible damage.

[0034] In view of this, an embodiment of the utility model provides a fire avoidance device for welding a cable duct 300, comprising: a protective sleeve 100 and a connecting structure 200, wherein the first end of the protective sleeve 100 is sleeved inside the cable duct 300, and the second end of the protective sleeve 100 is connected to the cable 400 through the connecting structure 200, and the outer surface of the protective sleeve 100 is provided with a fire-resistant protective layer.

[0035] See also Figure 1 The protective sleeve 100 is connected between the cable guide tube 300 and the inclined cable 400, which can effectively prevent high-temperature welding slag from directly contacting the PE protective film of the inclined cable 400, providing an efficient protection mechanism. The outer surface of the protective sleeve 100 is provided with a fire-resistant protective layer, which can ensure that the protective sleeve 100 will not fail due to high temperature during the welding process, thereby extending the service life of the fire avoidance device. In addition, the fire avoidance device can adjust the size as needed, can flexibly adapt to different processes and welding conditions, has a simple structure, is easy to disassemble and assemble, and can be widely used in replacement projects of various types of inclined cables 400, avoiding damage to the inclined cables 400 caused by welding slag.

[0036] In an optional manner of this embodiment, the fire avoidance device further includes an asbestos cloth 500 wound around the outer surface of the inclined cable 400, and the asbestos cloth 500 is arranged flush with the fire-resistant protective layer.

[0037] See also Figure 2 According to the position of the fire-resistant protective layer, a circle of asbestos cloth 500 needs to be wrapped around the outside of the inclined cable 400, and the fire-resistant protective layer is flush with the asbestos cloth 500, and it is ensured that the fire-resistant protective layer and the asbestos cloth 500 are both inside the cable guide tube 300. The asbestos cloth 500 has good fire-resistant and heat-insulating properties, which can further prevent high-temperature welding slag from directly contacting the PE protective film of the inclined cable 400, effectively avoiding damage to the inclined cable 400 caused by welding slag. The fire-resistant protective layer is preferably a fire-resistant stainless steel protective layer, which is easy to manufacture.

[0038] In an optional manner of this embodiment, the connection structure 200 includes a clamp 210 , which is installed at the end of the inclined cable 400 , and one end of the clamp 210 away from the inclined cable 400 is connected to the protective sleeve 100 .

[0039] See also Figure 2The clamp 210 is preferably a stainless steel clamp 210 , and the clamp 210 is installed on the inclined cable 400 , which can effectively connect the protective sleeve 100 and the inclined cable 400 .

[0040] Furthermore, a rubber pad 220 is provided between the clamp 210 and the inclined cable 400 .

[0041] See also Figure 3 The rubber pad 220 is fixed on the inner side of the clamp 210. The rubber pad 220 fits tightly to the inclined cable 400 and can play a buffering role between the clamp 210 and the inclined cable 400, so that the clamp 210 and the inclined cable 400 are better connected.

[0042] In an optional manner of this embodiment, a first fixing ear plate 230 and a second fixing ear plate 240 are welded to the clamp 210 . The first fixing ear plate 230 and the second fixing ear plate 240 are arranged opposite to each other and both extend outward from the outer end surface of the clamp 210 .

[0043] See also Figure 2 The first fixing ear plate 230 and the second fixing ear plate 240 extend outward from both ends of the semi-arc surface of the clamp 210, and the first fixing ear plate 230 and the second fixing ear plate 240 are welded to the clamp 210, and the structures are completely the same. The first fixing ear plate 230 and the second fixing ear plate 240 are both provided with a plurality of bolt holes 250, which can play a role in connection and fixing.

[0044] In an optional manner of this embodiment, a connecting ear plate 260 is further welded to the clamp 210, and the bottom of the connecting ear plate 260 is connected to the fire-resistant protective layer.

[0045] See also Figure 2 The connecting ear plate 260 is welded to the fire-resistant protective layer and the clamp 210 respectively, which plays a role in strengthening the structural strength and improving the connection stability.

[0046] In an optional manner of this embodiment, the protective sleeve 100, the clamp 210 and the rubber pad 220 are each provided in two groups, and the two groups are connected by a connecting piece.

[0047] See also Figure 3 , Figure 3 One group of protective sleeves 100, clamps 210 and rubber pads 220 is shown, and the other group is arranged in a matching manner. The connecting parts are passed through the corresponding bolt holes 250 on the two groups of first fixed ear plates 230 and the corresponding bolt holes 250 on the two groups of second fixed ear plates 240, thereby connecting the two groups into a whole.

[0048] In an optional manner of this embodiment, the protective sleeve 100 is made of a high temperature resistant and wear resistant material.

[0049] The protective sleeve 100 is manufactured using a high temperature resistant and wear resistant material, which can ensure that the protective sleeve 100 will not fail due to high temperature during the welding process, thereby extending the service life of the fire avoidance device.

[0050] Before welding construction, the installation process of the fire protection device is as follows:

[0051] First, the installation position of the fire protection device is determined according to the cutting and welding positions of the cable guide tube 300 .

[0052] Before installing the fire-proof device, it is necessary to wrap a circle of asbestos cloth 500 around the outside of the inclined cable 400 according to the position of the fire-resistant protective layer.

[0053] Then, the clamp 210 is installed on the inclined cable 400 , so that the rubber pad 220 is closely attached to the inclined cable 400 , the fire-resistant protective layer is flush with the asbestos cloth 500 , and it is ensured that the fire-resistant protective layer and the asbestos cloth 500 are both inside the cable conduit 300 .

[0054] Finally, bolts are passed through the bolt holes 250 reserved on the first fixing ear plate 230 and the second fixing ear plate 240 to fix the fire avoidance device.

[0055] This embodiment provides a fire avoidance device that can prevent welding slag from damaging the inclined cable 400 during the cutting and welding process of the cable guide tube 300. It has a simple structure and is easy to install, and can be widely used in replacement projects of various types of inclined cables 400.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A fire avoidance device for welding of a stay cable conduit, characterized in that: It comprises: a protective sleeve and a connecting structure, wherein the first end of the protective sleeve is sleeved inside the cable guide tube, the second end of the protective sleeve is connected to the inclined cable through the connecting structure, and the outer surface of the protective sleeve is provided with a fire-resistant protective layer.

2. The fire avoidance device for welding of the stay cable conduit according to claim 1 is characterized in that: It also includes asbestos cloth wrapped around the outer surface of the inclined cable, and the asbestos cloth is arranged flush with the fire-resistant protective layer.

3. The fire avoidance device for welding of the stay cable conduit according to claim 2 is characterized in that: The connection structure comprises a clamp, which is installed at the end of the inclined cable, and one end of the clamp away from the inclined cable is connected to the protective sleeve.

4. The fire avoidance device for welding of the stay cable conduit according to claim 3 is characterized in that: A rubber pad is arranged between the clamp and the inclined cable.

5. The fire avoidance device for welding of the stay cable conduit according to claim 4 is characterized in that: A first fixing ear plate and a second fixing ear plate are welded on the clamp, the first fixing ear plate and the second fixing ear plate are arranged opposite to each other, and both extend outward from the outer end surface of the clamp.

6. The fire avoidance device for welding of the stay cable conduit according to claim 5, characterized in that: A plurality of bolt holes are disposed on the first fixing ear plate and the second fixing ear plate.

7. The fire avoidance device for welding of the stay cable conduit according to claim 5, characterized in that: A connecting ear plate is also welded on the clamp, and the bottom of the connecting ear plate is connected to the fire-resistant protective layer.

8. The fire avoidance device for welding of a stay cable conduit according to claim 6, characterized in that: The protective sleeve, the clamp and the rubber pad are each provided in two groups, and the two groups are connected by a connecting piece.

9. The fire avoidance device for welding of the stay cable conduit according to claim 8, characterized in that: The connecting members are arranged through the corresponding bolt holes on the two groups of the first fixing lug plates and the corresponding bolt holes on the two groups of the second fixing lug plates.

10. The fire avoidance device for welding of a stay cable conduit according to claim 1, characterized in that: The protective sleeve is made of high temperature resistant and wear resistant material.

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