Cable laying device and floating roof tank

Abstract

The embodiment of the invention provides a cable laying device and a floating roof tank, and relates to the technical field of cable laying. The cable laying device comprises a frame body and a groove box chain, the groove box chain comprises a connecting box and at least two chain link sections, each chain link section comprises a plurality of groove boxes which are sequentially connected in a hinged mode, channels used for cable laying are formed in the groove boxes and the connecting boxes, the connecting boxes are connected between every two adjacent chain link sections in a hinged mode, and the connecting boxes are connected with the frame body in a sliding mode. The connecting box can ascend and descend relative to the frame body so that the groove box chain can stretch and retract in the ascending and descending direction of the connecting box. According to the embodiment of the invention, the cable can be laid in the channel of the groove box chain, so that the cable is protected; and under the action of lifting movement of the connecting box, the groove box chain can extend and contract along the lifting direction of the connecting box so as to adapt to the lifting action of the cable. Therefore, according to the embodiment of the invention, the abrasion of the cable at the floating roof outside the floating roof tank can be reduced, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of cable laying, and in particular to a cable laying device and a floating roof tank. Background Art

[0002] A floating roof tank is a large chemical equipment used to store gas. The external floating roof of a floating roof tank is a floating cover floating on the surface of the storage liquid, which can float up and down with the input and output of the stored gas. A variety of chemical detection remote transmission instruments are installed on the external floating roof of the floating roof tank, such as detectors of pressure, temperature, level and other related data, so that the gas storage situation in the tank can be monitored in real time.

[0003] Remote transmission instruments rely on cables to transmit relevant signals. In order to adapt to the lifting and lowering of the external floating roof, the cables are often reserved longer, and these cables are usually scattered on the top of the external floating roof or the platform of the water seal layer. However, due to the frequent movement and lifting of the cables, and the lack of protection of the cable trough box, long-term exposure to the external environment will cause the outer sheath of the cable to wear, thereby reducing the protection performance and service life of the cable. Summary of the invention

[0004] The present application provides a cable laying device and a floating roof tank, which are used to solve the problem that the cable of a remote transmission instrument on the top of the floating roof tank is easily worn.

[0005] On the one hand, the present application provides a cable laying device, applied to a floating roof tank, comprising:

[0006] Frame;

[0007] A trough box chain, the trough box chain includes a connecting box and at least two chain segments, the chain segments include a plurality of trough boxes hingedly connected in sequence, the trough boxes and the connecting boxes are provided with channels for laying cables, the connecting box is hingedly connected between two adjacent chain segments, and the connecting box is slidably connected to the frame, wherein the connecting box can be raised and lowered relative to the frame so that the trough box chain can be extended and contracted along the lifting direction of the connecting box.

[0008] In an optional embodiment, in the length direction of the channel, the trough box is provided with a first connection portion and a second connection portion at intervals, and the first connection portion of one of two adjacent trough boxes is plugged and rotatably connected with the second connection portion of the other.

[0009] In an optional embodiment, the first connecting portion is provided with an axial hole, the second connecting portion is provided with a pin shaft, and two adjacent trough boxes are rotatably connected to the pin shaft through the axial hole.

[0010] In an optional embodiment, one of the first connecting portion and the second connecting portion is provided with a limiting pin, and the other is provided with a limiting groove, and the limiting groove is arranged along the rotation direction of the slot box;

[0011] The limiting pin of one of the two adjacent slot boxes is slidably connected to the limiting slot of the other one to limit the relative rotation angle between the two adjacent slot boxes.

[0012] In an optional embodiment, the central angle of the limiting groove is less than 45 degrees.

[0013] In an optional embodiment, a sliding assembly is provided on one side of the connection box, and the sliding assembly includes:

[0014] A fixing frame, the fixing frame is fixedly connected to the connection box;

[0015] A pulley is rotatably connected to the fixed frame, the frame body is provided with a slide groove along the lifting direction of the connection box, the pulley is arranged in the slide groove and rollingly cooperates with the slide groove.

[0016] In an optional embodiment, when the trough box chain is contracted, two adjacent chain link segments are in an S shape.

[0017] In an optional embodiment, the slot box includes a slot body and a slot cover, and the slot cover is snap-connected to the slot box.

[0018] In an optional embodiment, the cable laying device also includes a connecting bridge, which is fixed relative to the external floating roof and connected to the trough box chain through the connecting box. The connecting bridge is provided with a laying channel, and the laying channel is used for laying the cable.

[0019] On the other hand, the present application provides a floating roof tank, comprising the above-mentioned cable laying device.

[0020] The embodiment of the present application provides a cable laying device and a floating roof tank, wherein the cable laying device includes a frame and a trough box chain, wherein the trough box chain is provided with a channel for laying cables, thereby protecting the cables; the trough box chain is slidably connected to the frame through a connecting box, and the chain segments can be extended and bent through the trough boxes that are hingedly connected in sequence, and under the lifting and moving action of the connecting box, the trough box chain can be extended and contracted along the lifting direction of the connecting box, thereby using the lifting action of the cable. Therefore, the cable laying device of the embodiment of the present application can not only meet the lifting and lowering requirements of the cable, but also protect the cable, thereby reducing the wear of the cable at the floating roof outside the floating roof tank and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1 An application scenario diagram of the cable laying device provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 A schematic diagram of another state structure of the cable laying device;

[0024] Figure 3 A schematic diagram of the structure of a trough box chain of a cable laying device provided in an embodiment of the present application;

[0025] Figure 4 A top view of a trough box of a cable laying device provided in an embodiment of the present application;

[0026] Figure 5 for Figure 4 Side view of

[0027] Figure 6 A schematic diagram of the connection between adjacent slot boxes provided in an embodiment of the present application;

[0028] Figure 7 A schematic structural diagram of a sliding assembly of a cable laying device provided in an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 100-frame; 110-slideway;

[0031] 200-slot box chain; 210-connecting box; 211-fixed frame; 212-pulley; 220-chain segment; 221-slot box; 221a-first connecting part; 221b-second connecting part; 2211-limiting pin; 2212-limiting slot; 2213-pin shaft; 2214-shaft hole;

[0032] 300-connecting bridge;

[0033] 400-external floating roof;

[0034] 500-Water seal tank.

[0035] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0037] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein.

[0038] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0039] The external floating roof (bell) of a floating roof tank is a floating cover floating on the surface of the liquid storage, which floats up and down with the input and output of the stored gas. There is an annular space between the floating roof and the tank wall, and a sealing device such as a water seal groove is set in the annular space. When the top cover floats up and down, the water seal groove can isolate the liquid in the tank from the atmosphere to reduce the evaporation loss of the stored gas during the storage process.

[0040] Since the bell of the external floating roof tank is a movable part that floats up and down, the remote transmission instrument mainly relies on the cable to move up and down in coordination with the detection instrument fixed on the bell. Therefore, a long section of instrument cable is often required on the floating roof tank. The traditional fixed laying is not suitable for cables that need to be lifted and moved. These cables are usually scattered on the top of the bell and the platform of the water seal tank, lacking the necessary protection. Therefore, due to the frequent movement and lifting of the cable, and without the protection of the cable trough box, long-term exposure to the external environment will cause the outer sheath of the instrument control cable to wear, thereby reducing the protection performance and service life of the cable.

[0041] Based on this, the present application provides a cable laying device and a floating roof tank, wherein the cable laying device includes a trough box chain that can be bent, so that the cable can be lifted and moved under the protection of the trough box chain and achieve the purpose of protection, thereby improving the protection performance of the cable.

[0042] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0043] See also Figures 1 to 3 The embodiment of the present application provides a cable laying device, which is applied to a floating roof tank. The cable laying device includes a frame 100 and a trough box chain 200, the trough box chain 200 includes a connection box 210 and at least two chain segments 220, the chain segment 220 includes a plurality of trough boxes 221 hingedly connected in sequence, and a channel for laying cables is provided in the trough box 221 and the connection box 210, the connection box 210 is hingedly connected between two adjacent chain segments 220, and the connection box 210 is slidably connected to the frame 100, wherein the connection box 210 can be raised and lowered relative to the frame 100, so that the trough box chain 200 can be extended and contracted along the lifting direction of the connection box 210.

[0044] in, Figure 1 It shows a schematic structural diagram of the slot box chain 200 in an extended state, Figure 2 A schematic structural diagram of the trough box chain 200 in a contracted state is shown.

[0045] The frame 100 is the basic supporting structure of the entire laying device, used to carry and support the tank box chain 200 and the cables inside it. The frame 100 can be fixedly installed on the floating roof tank sealing device, that is, the water seal tank, and its height can be determined according to the lifting height of the external floating roof 400.

[0046] See also Figure 3 The trough box chain 200 is composed of a connection box 210 and a chain segment 220. Each chain segment 220 is composed of a plurality of trough boxes 221 that are hingedly connected in sequence, so that the chain segment 220 can be bent within a certain angle range to adapt to the extension and contraction of the cable when following the rise and fall of the external floating roof 400.

[0047] The cables can be laid in the channels inside the trough box 221 and the channels inside the connection box 210, so as to avoid direct exposure of the cables to the external environment, reduce the wear and erosion of the cables caused by exposure to the sun, rain, abrasion, etc., help to increase the service life of the cables, and reduce the entanglement between the cables, so that the cables can be kept neat and orderly during the laying process. The channel size can be larger than the cable size, so as to provide sufficient space for the cables to ensure that the cables will not be excessively squeezed or damaged during the laying process.

[0048] The connection box 210 is hingedly connected between two adjacent chain segments 220 and is slidably connected to the frame 100, so that the connection box 210 can drive the chain segments 220 to slide on the frame 100 and enable the trough box chain 200 to extend or contract along the lifting direction of the connection box 210.

[0049] During actual installation, the frame 100 is installed on the platform of the sealing device of the floating roof tank, one end of the tank chain 200 can be fixed on the frame 100, and the other end is extended to the external floating roof 400 due to the upper end of the frame 100, so as to be connected with the remote instrument on the external floating roof 400. The length of the tank chain 200 is determined according to the length requirement of the cable laying, and an appropriate number of chain segments 220 can be sequentially connected through the connection box 210 to form the required length of the tank chain 200.

[0050] Therefore, the cable laying device of the embodiment of the present application can not only meet the lifting and lowering requirements of the cable, but also protect the cable, thereby reducing the wear of the cable at the floating roof 400 outside the floating roof tank and increasing its service life.

[0051] For example, the maximum bending shape of the chain segment 220 of this embodiment is similar to a semicircular arc, and two adjacent chain segments 220 form an "S" shape when bent, so that the trough box chain 200 can shrink along a predetermined shape when shrinking, thereby reducing the occupied space. It can be understood that the chain segment 220 selects the number of trough boxes 221 according to actual application requirements and considering the relative bendable angles between each trough box 221, so as to be connected in series into a whole segment to meet the telescopic action of the cable in the trough box chain 200.

[0052] See also Figures 4 to 6 In an optional embodiment, in the length direction of the channel, the slot box 221 is provided with a first connection portion 221a and a second connection portion 221b at intervals, and the first connection portion 221a of one of two adjacent slot boxes 221 is plugged and rotatably connected with the second connection portion 221b of the other.

[0053] Two adjacent trough boxes 221 are connected via a first connection portion 221 a and a second connection portion 221 b , that is, the first connection portion 221 a of one trough box is connected to the second connection portion 221 b of another trough box 221 .

[0054] On the one hand, the first connection part 221a and the second connection part 221b are plugged together to facilitate positioning and installation between adjacent trough boxes 221. It can be understood that the outer wall of the first connection part 221a matches the inner wall of the second connection part 221b, or the outer wall of the second connection part 221b matches the inner wall of the first connection part 221a. This is conducive to improving the connection stability between the first connection part 221a and the second connection part 221b.

[0055] Exemplarily, a sink is provided on the outer wall of the first connecting portion 221a, and a sink is provided on the inner wall of the second connecting portion 221b.

[0056] On the other hand, the first connection portion 221a and the second connection portion 221b are rotationally connected, for example, through a cylindrical connection member such as a rotating shaft, a pin shaft, or a pin.

[0057] See also Figure 5 In an optional embodiment, the first connecting portion 221a is provided with an axial hole 2214, the second connecting portion 221b is provided with a pin shaft 2213, and two adjacent slot boxes 221 are rotatably connected to the pin shaft 2213 through the axial hole 2214.

[0058] The axial hole 2214 and the pin 2213 are rotatably matched, so that the slot box 221 can rotate relative to its adjacent slot box 221, so as to facilitate cable contraction. When two adjacent slot boxes 221 need to be connected, the axial hole 2214 of the first connecting portion 221a of one slot box 221 is aligned with the pin 2213 of the second connecting portion 221b of the other slot box 221, and the pin 2213 is inserted into the axial hole 2214, so that the two slot boxes 221 can rotate relative to each other around the pin 2213.

[0059] The stability of the rotation connection depends on the matching accuracy and the materials used of the shaft hole 2214 and the pin 2213. In order to ensure smooth rotation and not easy to loosen, an appropriate amount of lubricant can be applied between the shaft hole 2214 and the pin 2213, and wear-resistant and corrosion-resistant materials are selected for manufacturing.

[0060] Exemplarily, an end cover is provided at the outer end of the pin shaft 2213 to protect the shaft hole 2214 and the pin shaft 2213 and prevent the entry of moisture and dust.

[0061] During the cable laying process, if the cable is subjected to excessive bending force, the wires or optical fibers inside the cable may be damaged, thereby affecting its transmission performance. In order to limit the rotation angle between two adjacent slot boxes 221, in an optional embodiment, one of the first connecting portion 221a and the second connecting portion 221b is provided with a limit pin 2211, and the other is provided with a limit groove 2212, and the limit groove 2212 is arranged along the rotation direction of the slot box 221; the limit pin 2211 of one of the two adjacent slot boxes 221 is slidably connected to the limit groove 2212 of the other to limit the relative rotation angle between the two adjacent slot boxes 221.

[0062] It can be understood that the shape and size of the limit pin 2211 match those of the limit groove 2212. The limit pin 2211 is inserted into the limit groove 2212 and can slide along the length direction of the limit groove 2212, enabling the adjacent slot boxes 221 to rotate relative to the pin shaft 2213. When the limit pin 2211 slides to the end of the limit groove 2212 and the relative angle of the adjacent two slot boxes 221 reaches the limit position, the limit pin 2211 will abut against the end of the limit groove 2212, thereby preventing the slot box 221 from rotating excessively and avoiding excessive bending of the cable.

[0063] In this embodiment, by using the cooperation of the limit pin 2211 and the limit groove 2212, the relative rotation angle between the slot boxes 221 can be restricted. The limit pin 2211 and the limit groove 2212 can effectively prevent the cable from being excessively bent or damaged, thereby ensuring the transmission performance and safety of the cable.

[0064] In an alternative embodiment, the central angle of the limit groove 2212 is less than 45 degrees.

[0065] An overly large bending radius is likely to cause damage to the wires or optical fibers inside the cable. By limiting the central angle of the limit groove 2212 to less than 45 degrees, it is ensured that the cable maintains a relatively small bending radius at the connection between the slot boxes 221, thereby protecting the cable from damage. When the central angle of the limit groove 2212 is less than 45 degrees, the limit groove 2212 limits the maximum angle by which the adjacent slot boxes 221 can rotate relative to each other, which helps to ensure that the cable will not be excessively bent or squeezed due to excessive rotation of the slot boxes 221 during the laying process.

[0066] Please refer to Figure 7 , in an alternative embodiment, a sliding assembly is provided on one side of the connection box 210. The sliding assembly includes a fixed frame 211 and a pulley 212.

[0067] The fixed frame 211 is fixedly connected to the connection box 210; the pulley 212 is rotatably connected to the fixed frame 211. A sliding groove 110 is provided on the frame body 100 along the lifting direction of the connection box 210, and the pulley 212 is arranged in the sliding groove 110 and is in rolling cooperation with the sliding groove 110.

[0068] The fixed frame 211 is used to support the pulley 212 and ensure the correct alignment and stable connection between the pulley 212 and the sliding groove 110. The pulley 212 is arranged in the sliding groove 110, and the sliding groove 110 provides a rolling path for the pulley 212. Its shape and size need to match those of the pulley 212 to ensure that the pulley 212 can roll smoothly therein. With the rolling cooperation between the pulley 212 and the sliding groove 110, the pulley 212 reduces the frictional resistance and improves the moving efficiency, making the movement of the connection box 210 smoother and more efficient.

[0069] For example, the cross section of the slide 110 is a "convex" shape, the pulley 212 is inside the slide 110 and is limited at one end of the slide 110, the fixing frame 211 is slidably matched with the notch of the slide 110, and the notch can guide the movement of the fixing frame 211. The pulley 212 is made of wear-resistant and corrosion-resistant materials, such as nylon, stainless steel or alloy steel, which helps to reduce friction and wear between the slide 110 and the slide 110 during rolling.

[0070] In an optional embodiment, the slot box 221 includes a slot body and a slot cover, and the slot cover is snap-connected to the slot box 221 .

[0071] The trough body is the main part of the trough box 221, which is usually a U-shaped trough with certain strength and rigidity to ensure that the shape and stability of the trough box 221 can be maintained during the cable laying process. A channel is provided inside the trough body for accommodating and laying cables. The trough cover is the covering part of the trough box 221, and the trough cover can be detachably connected to the trough body so that the trough body can be opened or closed during maintenance and laying.

[0072] It is understandable that the shape and size of the slot cover need to match the slot body to ensure a tight fit when closed to prevent dust, moisture and other debris from entering the slot body.

[0073] The slot cover is connected to the slot body by snaps, ensuring that the slot cover is tightly fixed to the slot body when closed, preventing it from loosening or falling off and making the slot cover easier to open and close without the use of additional tools or equipment, which helps to improve the efficiency of cable laying and maintenance.

[0074] Exemplarily, the trough body includes a bottom plate and two side plates arranged opposite to each other, the side plates are fixedly arranged on the bottom plate, and the trough cover is buckled on the two side plates to form a channel for laying cables.

[0075] In an optional embodiment, please continue to refer to Figure 1 and Figure 2 The cable laying device also includes a connecting bridge 300, which is fixed relative to the external floating roof 400 and connected to the trough box chain 200 through a connecting box 210. The connecting bridge 300 is provided with a laying channel for laying cables.

[0076] The connecting bridge 300 connects the tank box chain 200 with the external floating roof 400, so that the cable can be laid on the external floating roof 400 through the connecting bridge 300, so as to facilitate the connection of the cable with the remote instrument or detection instrument on the external floating roof 400. The laying channel of the connecting bridge 300 is used for laying cables, which helps to ensure the safety and stability of the cables during the laying process.

[0077] The connecting bridge 300 is fixed relative to the external floating roof 400, that is, the connecting bridge 300 moves with the lifting and lowering of the external floating roof 400. In this way, when the external floating roof 400 moves, the external floating roof 400 drives the connecting bridge 300 to move, and further drives the tank box chain 200 on the frame body 100 to move.

[0078] In addition, by connecting the bridge 300 to the trough box chain 200, the cable laying device can more flexibly adapt to the requirements of different laying environments. For example, when it is necessary to cross obstacles or lay cables between different heights, it can be achieved by adjusting the height and position of the bridge 300.

[0079] Exemplarily, the connecting bridge 300 is fixedly disposed on the external floating roof 400 via supporting columns, so that the connecting bridge 300 and the external floating roof 400 are connected as a whole.

[0080] The embodiment of the present application also provides a floating roof tank, including the cable laying device of any of the above embodiments. The floating roof tank includes a tank body and the above cable laying device, and the cable laying device is arranged on the tank body. Specifically, the tank body includes an external floating roof 400 located at the top, a water seal tank 500 is arranged between the external floating roof 400 and the tank body, a frame 100 of the cable laying device is arranged on the water seal tank 500, and a connecting bridge 300 extends to the external floating roof 400 and is fixedly connected to the external floating roof 400.

[0081] It can be understood that the floating roof tank has the beneficial effects of the cable laying device of any of the above-mentioned embodiments, so they will not be described one by one here.

[0082] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0083] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A cable laying device, applied to a floating roof tank, characterized in that: include: A frame (100); A trough box chain (200), the trough box chain (200) comprising a connection box (210) and at least two chain segments (220), the chain segment (220) comprising a plurality of trough boxes (221) hingedly connected in sequence, the trough boxes (221) and the connection box (210) being provided with channels for laying cables, the connection box (210) being hingedly connected between two adjacent chain segments (220), and the connection box (210) being slidably connected to the frame (100), wherein the connection box (210) can be raised and lowered relative to the frame (100) so that the trough box chain (200) can be extended and contracted along the raising and lowering direction of the connection box (210).

2. The cable laying device according to claim 1, characterized in that: In the length direction of the channel, the trough box (221) is provided with a first connection part (221a) and a second connection part (221b) at intervals, and the first connection part (221a) of one of two adjacent trough boxes (221) is plugged and rotatably connected with the second connection part (221b) of the other.

3. The cable laying device according to claim 2, characterized in that: The first connecting portion (221a) is provided with an axial hole (2214), the second connecting portion (221b) is provided with a pin shaft (2213), and two adjacent slot boxes (221) are rotatably connected to the pin shaft (2213) via the axial hole (2214).

4. The cable laying device according to claim 2, characterized in that: One of the first connecting portion (221a) and the second connecting portion (221b) is provided with a limiting pin (2211), and the other is provided with a limiting groove (2212), and the limiting groove (2212) is arranged along the rotation direction of the slot box (221); The limiting pin (2211) of one of the two adjacent slot boxes (221) is slidably connected to the limiting slot (2212) of the other one, so as to limit the relative rotation angle between the two adjacent slot boxes (221).

5. The cable laying device according to claim 4, characterized in that: The center angle of the limiting groove (2212) is less than 45 degrees.

6. The cable laying device according to any one of claims 1 to 5, characterized in that: A sliding assembly is provided on one side of the connection box (210), and the sliding assembly comprises: A fixing frame (211), the fixing frame (211) being fixedly connected to the connection box (210); A pulley (212), the pulley (212) is rotatably connected to the fixed frame (211), the frame body (100) is provided with a slide groove (110) along the lifting direction of the connection box (210), and the pulley (212) is arranged in the slide groove (110) and rollingly cooperates with the slide groove (110).

7. The cable laying device according to claim 6, characterized in that: When the trough box chain (200) is contracted, two adjacent chain link segments (220) are in an S shape.

8. The cable laying device according to claim 6, characterized in that: The slot box (221) comprises a slot body and a slot cover, and the slot cover is snap-connected to the slot box (221).

9. The cable laying device according to claim 6, characterized in that: It also includes a connecting bridge (300), which is fixedly arranged relative to the external floating roof (400) and connected to the trough box chain (200) via the connecting box (210), and the connecting bridge (300) is provided with a laying channel, and the laying channel is used for laying the cable.

10. A floating roof tank, characterized in that: A cable laying device comprising the cable laying device according to any one of claims 1 to 9.

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