Cable box expansion joint adapted to strain of exposed deck of large tanker

Abstract

The cable box expansion joint comprises a first cable tube, a first flange plate, a second cable tube, a second flange plate, a rubber pressing strip, a plurality of gaskets, a plurality of bolts and a plurality of nuts, one end of the first cable tube is fixedly connected with the cable box, and the tail end of the first cable tube is fixedly connected with the middle part of the first flange plate; one end of the second cable tube is inserted into the first cable tube; the inner diameter of the rubber pressing strip is the same as the outer diameter of the second cable pipe, the rubber pressing strip is arranged on the second cable pipe in a sleeving mode and makes contact with the lower connector of the first flange plate, the second flange plate is arranged in the middle of the second cable pipe in a sleeving mode, the lower connector of the second flange plate makes contact with the rubber pressing strip, and a plurality of gaskets are arranged between the first flange plate and the second flange plate in a sleeving mode. The first flange plate and the second flange plate are fixedly connected through bolts and nuts. Therefore, according to the design, the length of the exposed deck strain can be adjusted in time, and the telescopic effect is good.

Description

Technical Field

[0001] The invention relates to an expansion joint, belongs to the field of ship engineering, and in particular to a cable box expansion joint adapted to the strain of an open-air deck of a large oil tanker. Background Art

[0002] At present, with the increasing demand for energy such as crude oil, the demand for large oil tankers is also increasing. The open deck area on large oil tankers needs to lay a variety of cables to meet the power and signal transmission needs of the ship, ensuring the normal operation of the ship's power, lighting and control host systems; in order to avoid damage to the cables, cable pipes and cable boxes are needed to protect the cables when laying cables in the open deck area. However, due to the influence of ship structure, material characteristics and driving environment, the open deck will produce a certain length change due to strain, causing pulling and squeezing of the cable box and cable pipe; in order to adapt to the length change of the open deck caused by strain, ensure the reliability and safety of the cable system, and meet relevant specifications and safety requirements, it is necessary to set an expansion joint at the cable box. However, due to the complex driving environment and the long length of the open deck area of ​​the tanker, the conventional pipeline expansion joint cannot make immediate feedback to the length change of the open deck caused by strain, and the expansion effect is not good.

[0003] The Chinese patent application with application number 200820050930.8 and application date July 18, 2008, discloses a connection structure between a cable box and a cable pipe. A pipe with a flange is provided on the side of the cable box. A section of the inner diameter of the end of the pipe is enlarged to form a step. A compression pipe is inserted into the step. A sealing gasket is installed between the end of the inserted pipe section and the bottom of the step. The other end of the compression pipe also has a flange. The two flanges are screwed together by a screw and a nut. Tightening and loosening the screw and the nut can make the compression pipe move inward or outward along the step, and tighten or loosen the sealing gasket. In a cable box with this connection structure, the cable pipe can adjust the depth of the insertion pipe to adapt to the expansion and contraction of the deck. The cable pipe itself will not be stretched or contracted, and will not be damaged. However, it still has the following defects:

[0004] This design cannot make instant length adjustments to the strain on the tanker's open deck, and the telescopic effect is poor.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects and problems existing in the prior art that the length cannot be adjusted immediately according to the strain of the open deck of the oil tanker and the telescopic effect is not good, and to provide a cable box expansion joint that can adjust the length of the open deck of the oil tanker immediately and has a good telescopic effect and is suitable for the strain of the open deck of large oil tankers.

[0007] To achieve the above purpose, the technical solution of the present invention is: a cable box expansion joint adapted to the strain of the open-air deck of a large oil tanker, the cable box expansion joint adapted to the strain of the open-air deck of a large oil tanker comprises a first cable tube, a first flange, a second cable tube, a second flange, a rubber compression strip, a plurality of gaskets, a plurality of bolts, and a plurality of nuts; the diameter of the first cable tube is greater than the diameter of the second cable tube, the first flange and the second flange are of the same model, and the models of the first cable tube, the second cable tube, the first flange, the second flange, the bolts and the nuts match each other;

[0008] One end of the first cable tube is fixedly connected to the cable box, the tail end of the first cable tube is fixedly connected to the middle of the first flange, and one end of the second cable tube is inserted into the first cable tube; the rubber compression strip is annular, and the inner diameter of the rubber compression strip is the same as the outer diameter of the second cable tube. The rubber compression strip is sleeved on the second cable tube and contacts the lower interface of the first flange. The second flange is sleeved in the middle of the second cable tube, and the lower interface of the second flange contacts the rubber compression strip. A number of gaskets are sleeved between the first flange and the second flange. The first flange and the second flange are fixedly connected by bolts and nuts, and the rubber compression strip is clamped between the first flange and the second flange.

[0009] The cross-sectional shape of the rubber pressure strip is a hexagon, and the cross-sectional shape of the rubber pressure strip includes an upper top side, a first left side, a second left side, a lower bottom side, a second right side, and a first right side, one end of the upper top side is connected to one end of the first left side, the other end of the first left side is connected to one end of the second left side, the other end of the second left side is connected to one end of the lower bottom side, the other end of the lower bottom side is connected to one end of the second right side, the other end of the second right side is connected to one end of the first right side, and the other end of the first right side is connected to the other end of the upper top side;

[0010] The lower bottom edge contacts the outer side of the second cable tube, the first left side contacts the lower interface of the first flange, and the first right side contacts the lower interface of the second flange;

[0011] The upper top edge, the first left side edge, the second left side edge, the lower bottom edge, the second right side edge, and the first right side edge are all straight edges, and the second left side edge and the second right side edge are respectively perpendicular to the lower bottom edge.

[0012] The material of the rubber pressing strip is chloroprene rubber.

[0013] The head end of the first cable tube is inserted into the cable box, and the insertion depth of the first cable tube is 20-70 mm;

[0014] The head end of the second cable tube is inserted into the first cable tube, and the insertion depth of the second cable tube is 50-100 mm;

[0015] The distance between the bottom of the first flange and the cable box contacted by the first cable pipe is 150-250 mm.

[0016] The diameter model of the first cable pipe is one level or two levels larger than the diameter model of the second cable pipe.

[0017] The first cable pipe and the second cable pipe are both seamless steel pipes.

[0018] The lower interface of the first flange is provided with a beveled edge adapted to the first left side of the rubber pressing strip, and the lower interface of the second flange is provided with a beveled edge adapted to the first right side of the rubber pressing strip;

[0019] The first flange is provided with a plurality of through holes on its circumference, and the second flange is provided with a plurality of through holes on its circumference corresponding to the through holes of the first flange one by one. The bolts pass through the through holes of the first flange and the through holes of the second flange and are threadedly connected with nuts.

[0020] The first flange and the second flange are full-plane blind steel flanges, and the diameters of the central circular holes of the first flange and the second flange are determined according to the diameter model of the second cable pipe;

[0021] The diameters of the central circular holes of the first flange and the second flange are both 7-11 mm larger than the outer diameter of the second cable tube.

[0022] The material of the first flange and the second flange is consistent with the material of the first cable tube and the second cable tube.

[0023] The first cable tube, the first flange, the second cable tube, the second flange, the bolts and the nuts are subjected to surface treatment as a whole.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In a cable box expansion joint adapted to the strain of an open deck of a large oil tanker, the diameter of the first cable tube is larger than the diameter of the second cable tube, the first cable tube, the second cable tube, the first flange, the second flange, the bolts and the nuts are matched with each other, one end of the first cable tube is fixedly connected to the cable box, the tail end of the first cable tube is fixedly connected to the middle of the first flange, one end of the second cable tube is inserted into the first cable tube, the rubber compression strip is annular, the rubber compression strip is sleeved and fitted on the second cable tube and contacts the lower interface of the first flange, the second flange is sleeved in the middle of the second cable tube and contacts the rubber compression strip, a plurality of gaskets are sleeved between the first flange and the second flange and fixedly connected by bolts and nuts, the cross-sectional shape of the rubber compression strip is hexagonal, and the material of the rubber compression strip is chloroprene rubber; when used, the first flange and the second flange The rubber compression strip is clamped in the middle, because the inner diameter of the rubber compression strip is the same as the outer diameter of the second cable tube, the position of the second cable tube is fixed by clamping the rubber compression strip by the first flange and the second flange. When the open deck is strained and causes a length change, the second cable tube slides in the first cable tube, the relative position of the first cable tube and the second cable tube changes, and friction is generated on the rubber compression strip. Then, due to the shape of the rubber compression strip and the ductility of the chloroprene rubber material, the rubber compression strip moves upward along the gap between the first flange and the second flange, so that the lower part of the rubber compression strip is spaced from the outside of the second cable tube, thereby making the sliding of the second cable tube smoother. When the relative position of the first cable tube and the second cable tube remains unchanged, the rubber compression strip is again close to the outside of the second cable tube, and the position of the second cable tube is fixed, so as to achieve instant adjustment of the length of the cable duct and adapt to the length change of the deck area. Therefore, the present invention can not only adapt to the length change caused by the strain of the open deck of a large oil tanker, but also can adjust the length instantly, and has a good telescopic effect.

[0026] 2. In a cable box expansion joint adapted to the strain of an open deck of a large oil tanker, the head end of the first cable pipe is inserted into the cable box, the insertion depth of the first cable pipe is 20-70 mm, the head end of the second cable pipe is inserted into the first cable pipe, the insertion depth of the second cable pipe is 50-100 mm, the pipe box distance between the bottom of the first flange and the cable box contacted by the first cable pipe is 150-250 mm, the pipe diameter model of the first cable pipe is one or two levels larger than the pipe diameter model of the second cable pipe, and the first cable pipe and the second cable pipe are both seamless steel pipes; when applied, the pipe diameter of the first cable pipe is determined according to the pipe diameter model of the second cable pipe, and the first cable pipe is The head end of the cable tube is inserted into the cable box for fixed connection, and then the head end of the second cable tube is inserted into the first cable tube, and the insertion depth of the first cable tube is maintained at 20-70mm, and the insertion depth of the second cable tube is maintained at 50-100mm, so that the connection between the first cable tube and the second cable tube is smoother, and good expansion and contraction are maintained, so that the cable can be smoothly laid in the cable box and the cable tube. Due to this connection method and the structure of the expansion joint, when the length of the open deck changes, according to the different expansion and contraction points of the deck, the second cable tube slides along the first cable tube, and realizes free and instant deformation on one side of the cable box, with more adjustability and buffer points, meeting the deformation requirements of different areas of the hull. Therefore, the present invention can not only automatically adapt to the strain of the open deck of a large oil tanker, but also has stronger adjustability and real-time performance.

[0027] 3. In a cable box expansion joint adapted to the strain of an open deck of a large oil tanker, a beveled edge adapted to the first left side of a rubber compression strip is provided at the lower interface of the first flange, a beveled edge adapted to the first right side of the rubber compression strip is provided at the lower interface of the second flange, a plurality of through holes are provided on the circumference of the first flange, a plurality of through holes corresponding to the through holes of the first flange are provided on the circumference of the second flange, the bolts are threadedly connected with nuts after passing through the through holes of the first flange and the second flange, the first flange and the second flange are full-plane blind steel flanges, and the diameters of the central circular holes of the first flange and the second flange are according to The diameter model of the second cable tube is determined; when used, the first flange fixed to the tail end of the first cable tube and the second flange sleeved in the middle of the second cable tube clamp the rubber compression strip between the two, and the first flange and the second flange are fixed by bolts and nuts, so that the first cable tube and the second cable tube are connected and fixed. The fixing method using bolts and nuts is simpler and more convenient, and the installation efficiency is higher, which reduces the installation cost of the telescopic joint. The diameter of the first cable tube and the diameter of the circular hole in the middle of the first flange and the second flange are determined according to the diameter model of the second cable tube. The application range is wider. At the same time, under the premise of meeting the telescopic function, materials can be saved to a greater extent. Therefore, the present invention can not only automatically and instantly adjust the length, but also has lower material cost and installation cost.

[0028] 4. In a cable box expansion joint adapted to the strain of the open deck of a large oil tanker, the first cable tube, the first flange, the second cable tube, the second flange, the bolts and the nuts are subjected to surface treatment as a whole; when used, the first cable tube, the first flange, the second cable tube, the second flange, the bolts and the nuts are subjected to surface treatment such as hot-dip galvanizing, hot-dip galvanizing or shop primer as a whole, which can not only improve the corrosion resistance, aesthetics, stability and reliability of the present invention by means of surface treatment, extend the service life of the present invention, but also reduce the production cost by surface treatment as a whole. Therefore, the present invention can not only adapt to the strain of the open deck of a large oil tanker, but also has a lower production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic assembly diagram of the expansion joint of the cable box in the present invention.

[0030] Figure 2 It is a detailed structural diagram of the cable box expansion joint in the present invention.

[0031] Figure 3 It is a cross-sectional structural diagram of the rubber compression strip in the present invention.

[0032] Figure 4 It is a real use diagram of the present invention.

[0033] In the figure: first cable pipe 1, first flange 11, gasket 12, bolt 13, nut 14, second cable pipe 2, second flange 21, rubber pressure strip 3, upper top edge 31, first left side 32, second left side 33, lower bottom edge 34, second right side 35, first right side 36, cable box 4, middle circular hole diameter A, first cable pipe insertion depth B, second cable pipe insertion depth C, pipe-box distance D, cable 5. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] See also Figure 1 — Figure 4 , a cable box expansion joint adapted to the strain of the open-air deck of a large oil tanker, the cable box expansion joint adapted to the strain of the open-air deck of a large oil tanker comprises a first cable tube 1, a first flange 11, a second cable tube 2, a second flange 21, a rubber compression strip 3, a plurality of gaskets 12, a plurality of bolts 13, and a plurality of nuts 14; the diameter of the first cable tube 1 is greater than the diameter of the second cable tube 2, the first flange 11 and the second flange 21 are of the same model, and the models of the first cable tube 1, the second cable tube 2, the first flange 11, the second flange 21, the bolts 13 and the nuts 14 match each other;

[0036] One end of the first cable tube 1 is fixedly connected to the cable box 4, the tail end of the first cable tube 1 is fixedly connected to the middle of the first flange 11, and one end of the second cable tube 2 is inserted into the first cable tube 1; the rubber compression strip 3 is annular, and the inner diameter of the rubber compression strip 3 is the same as the outer diameter of the second cable tube 2, the rubber compression strip 3 is sleeved on the second cable tube 2 and contacts with the lower interface of the first flange 11, the second flange 21 is sleeved in the middle of the second cable tube 2, and the lower interface of the second flange 21 contacts with the rubber compression strip 3, a plurality of gaskets 12 are sleeved between the first flange 11 and the second flange 21, the first flange 11 and the second flange 21 are fixedly connected by bolts 13 and nuts 14, and the rubber compression strip 3 is clamped between the first flange 11 and the second flange 21.

[0037] The cross-sectional shape of the rubber pressure strip 3 is a hexagon, and the cross-sectional shape of the rubber pressure strip 3 includes an upper top edge 31, a first left side edge 32, a second left side edge 33, a lower bottom edge 34, a second right side edge 35, and a first right side edge 36. One end of the upper top edge 31 is connected to one end of the first left side edge 32, the other end of the first left side edge 32 is connected to one end of the second left side edge 33, the other end of the second left side edge 33 is connected to one end of the lower bottom edge 34, the other end of the lower bottom edge 34 is connected to one end of the second right side edge 35, the other end of the second right side edge 35 is connected to one end of the first right side edge 36, and the other end of the first right side edge 36 is connected to the other end of the upper top edge 31.

[0038] The lower bottom edge 34 contacts the outer side of the second cable tube 2, the first left side edge 32 contacts the lower interface of the first flange 11, and the first right side edge 36 contacts the lower interface of the second flange 21;

[0039] The upper top edge 31 , the first left side edge 32 , the second left side edge 33 , the lower bottom edge 34 , the second right side edge 35 , and the first right side edge 36 are all straight edges, and the second left side edge 33 and the second right side edge 35 are respectively perpendicular to the lower bottom edge 34 .

[0040] The material of the rubber pressing strip 3 is chloroprene rubber.

[0041] The head end of the first cable tube 1 is inserted into the cable box 4, and the insertion depth B of the first cable tube is 20-70 mm;

[0042] The head end of the second cable tube 2 is inserted into the first cable tube 1, and the insertion depth C of the second cable tube is 50-100 mm;

[0043] A pipe-box distance D between the bottom of the first flange 11 and the cable box 4 contacted by the first cable pipe 1 is 150-250 mm.

[0044] The diameter of the first cable pipe 1 is one level or two levels larger than the diameter of the second cable pipe 2 .

[0045] The first cable tube 1 and the second cable tube 2 are both seamless steel tubes.

[0046] The lower interface of the first flange 11 is provided with a beveled edge adapted to the first left side 32 of the rubber pressing strip 3, and the lower interface of the second flange 21 is provided with a beveled edge adapted to the first right side 36 of the rubber pressing strip 3;

[0047] The first flange 11 has a plurality of through holes on its circumference, and the second flange 21 has a plurality of through holes on its circumference corresponding to the through holes of the first flange 11 . The bolts 13 pass through the through holes of the first flange 11 and the through holes of the second flange 21 and are threadedly connected with the nuts 14 .

[0048] The first flange 11 and the second flange 21 are full-plane blind steel flanges, and the diameter A of the central circular hole of the first flange 11 and the second flange 21 is determined according to the pipe diameter model of the second cable tube 2;

[0049] The diameters A of the central holes of the first flange 11 and the second flange 21 are both 7-11 mm larger than the outer diameter of the second cable tube 2 .

[0050] The material of the first flange 11 and the second flange 21 is consistent with the material of the first cable tube 1 and the second cable tube 2 .

[0051] The first cable tube 1 , the first flange 11 , the second cable tube 2 , the second flange 21 , the bolts 13 and the nuts 14 are all subjected to surface treatment.

[0052] The supplementary description of the present invention is as follows:

[0053] The present invention preferably arranges a plurality of the present inventions on the open deck of a large oil tanker, with the intervals between them not exceeding thirty meters.

[0054] In the present invention, one end of the first cable tube 1 is preferably fixedly connected to the cable box 4 by welding.

[0055] In the present invention, the tail end of the first cable tube 1 is preferably fixedly connected to the middle portion of the first flange 11 by welding.

[0056] In the present invention, it is preferred that the thickness of the plurality of gaskets 12 sleeved between the first flange 11 and the second flange 21 is less than or equal to the length of the upper top edge 31 of the rubber pressure strip 3 .

[0057] In the present invention, the thickness of the plurality of gaskets 12 sleeved between the first flange 11 and the second flange 21 is preferably less than or equal to 5 mm.

[0058] In the present invention, the material of the first cable tube 1 and the second cable tube 2 preferably conforms to GB-Q235A.

[0059] In the present invention, the specifications of the first flange 11 and the second flange 21 preferably conform to GB2506-89.

[0060] In the present invention, the first cable tube 1, the first flange 11, the second cable tube 2, the second flange 21, the bolts 13 and the nuts 14 are preferably subjected to surface treatment such as hot-dip galvanizing, hot-dip galvanizing or shop primer.

[0061] In the present invention, the pressure level of the first flange 11 and the second flange 21 is preferably 0.6 MPA.

[0062] The reason why the present invention preferably sets the diameter A of the middle circular hole to be 7-11 mm larger than the outer diameter of the second cable tube 2 is that if the diameter A of the middle circular hole is too large, it cannot match the size of the rubber pressure strip 3, thereby affecting the fixing effect of the second cable tube 2; if it is too small, the distance between the second flange 21 and the outer side of the second cable tube 2 will be insufficient, affecting the sliding of the rubber pressure strip 3 between the first flange 11 and the second flange 21, thereby affecting the telescopic effect.

[0063] The reason why the present invention prefers that the first cable tube insertion depth B is 20-70 mm is that if the first cable tube insertion depth B is too long, it will affect the installation of the cable 5 inside the first cable tube 1 and the cable box 4; if it is too short, it will affect the telescopic effect of the cable box telescopic joint.

[0064] The reason why the present invention prefers that the insertion depth C of the second cable tube is 50-100 mm is that if the insertion depth C of the second cable tube is too long, the head end of the second cable tube 2 will extend too long from the inside of the cable box 4, thereby affecting the installation of the cable 5 from the cable tube to the lower part of the cable box 4, and affecting the protection effect of the cable 5; if it is too short, the overlapping part of the second cable tube 2 and the first cable tube 1 will be too short, and the second cable tube 2 will slip out of the first cable tube 1 during the extension and retraction process, thereby affecting the extension and retraction effect.

[0065] The reason why the preferred pipe-box distance D of the present invention is 150-250 mm is that if the pipe-box distance D is too long, the manufacturing cost will increase; if it is too short, the overlapping part of the second cable tube 2 and the first cable tube 1 will be too short, thereby making the telescopic amount too small. During the telescopic process, the second cable tube 2 will slide out of the first cable tube 1, affecting the telescopic effect.

[0066] The reason why the present invention prefers that the diameter model of the first cable tube 1 is one level or two levels larger than the diameter model of the second cable tube 2 is that: when the diameter of the first cable tube 1 is three or more levels larger than that of the second cable tube 2, the corresponding first flange 11 and second flange 21 will be larger in model and weight, which will increase the material cost and the dead weight of the expansion joint, thereby affecting the overall effect of cable laying; when the diameter difference between the first cable tube 1 and the second cable tube 2 is too small, the second cable tube 2 cannot be inserted into the first cable tube 1, and the connectivity between the cable tubes cannot be guaranteed.

[0067] Embodiment 1:

[0068] See also Figure 1 — Figure 4 A cable box expansion joint adapted to the strain of an open-air deck of a large oil tanker, the cable box expansion joint adapted to the strain of an open-air deck of a large oil tanker comprising a first cable tube 1, a first flange 11, a second cable tube 2, a second flange 21, a rubber compression strip 3, a plurality of gaskets 12, a plurality of bolts 13, and a plurality of nuts 14; the diameter of the first cable tube 1 is greater than the diameter of the second cable tube 2, the first flange 11 and the second flange 21 are of the same model, the first cable tube 1, the second cable tube 2, the first flange 11, the second flange 21, the bolts 13 and the nuts 14 are matched with each other; one end of the first cable tube 1 is fixedly connected to a cable box 4, the tail end of the first cable tube 1 is connected to the middle of the first flange 11 The first and second cable tubes 2 are fixedly connected, one end of the second cable tube 2 is inserted into the first cable tube 1; the rubber pressing strip 3 is annular, the inner diameter of the rubber pressing strip 3 is the same as the outer diameter of the second cable tube 2, the rubber pressing strip 3 is sleeved on the second cable tube 2, and contacts with the lower interface of the first flange 11, the second flange 21 is sleeved in the middle of the second cable tube 2, the lower interface of the second flange 21 contacts with the rubber pressing strip 3, a plurality of gaskets 12 are sleeved between the first flange 11 and the second flange 21, the first flange 11 and the second flange 21 are fixedly connected by bolts 13 and nuts 14, and the rubber pressing strip 3 is clamped between the first flange 11 and the second flange 21.

[0069] When in use, one end of the first cable tube 1 is fixedly connected to the cable box 4, one end of the second cable tube 2 is inserted into the first cable tube 1, and the rubber compression strip 3 is sleeved on the second cable tube 2. The rubber compression strip 3 is sandwiched between the first flange 11 and the second flange 21. Because the inner diameter of the rubber compression strip 3 is the same as the outer diameter of the second cable tube 2, the position of the second cable tube 2 is fixed by clamping the rubber compression strip 3 by the first flange 11 and the second flange 21; when the open deck is strained and causes a length change, the relative position of the first cable tube 1 and the second cable tube 2 changes, and the second cable tube 2 slides in the first cable tube 1 and Friction is generated on the rubber compression strip 3, and then due to the shape of the rubber compression strip 3 and the ductility of the neoprene material, the rubber compression strip 3 moves upward along the gap between the first flange 11 and the second flange 21, so that a distance is created between the lower part of the rubber compression strip 3 and the outer side of the second cable tube 2, thereby making the sliding of the second cable tube 2 smoother. When the relative positions of the first cable tube 1 and the second cable tube 2 remain unchanged, the rubber compression strip 3 is again pressed against the outer side of the second cable tube 2 to fix the position of the second cable tube 2, so as to achieve instant adjustment of the length of the cable tube, automatically and instantly adapting to the length change caused by strain in the deck area.

[0070] Embodiment 2:

[0071] The basic content is the same as that of Example 1, except that: the cross-sectional shape of the rubber pressure strip 3 is a hexagon, and the cross-sectional shape of the rubber pressure strip 3 includes an upper top edge 31, a first left side edge 32, a second left side edge 33, a lower bottom edge 34, a second right side edge 35, and a first right side edge 36, one end of the upper top edge 31 is connected to one end of the first left side edge 32, the other end of the first left side edge 32 is connected to one end of the second left side edge 33, the other end of the second left side edge 33 is connected to one end of the lower bottom edge 34, the other end of the lower bottom edge 34 is connected to one end of the second right side edge 35, and the other end of the second right side edge 35 is connected to the first right side edge 36. One end of a right side edge 36 is connected, and the other end of the first right side edge 36 is connected to the other end of the upper top edge 31; the lower bottom edge 34 is in contact with the outer side of the second cable tube 2, the first left side edge 32 is in contact with the lower interface of the first flange 11, and the first right side edge 36 is in contact with the lower interface of the second flange 21; the upper top edge 31, the first left side edge 32, the second left side edge 33, the lower bottom edge 34, the second right side edge 35, and the first right side edge 36 are all straight edges, and the second left side edge 33 and the second right side edge 35 are respectively perpendicular to the lower bottom edge 34; the material of the rubber compression strip 3 is chloroprene rubber.

[0072] During application, when the open deck of a large oil tanker is strained and changes in length, the second cable tube 2 slides in the first cable tube 1, and under the action of friction, the upper top edge 31 of the rubber pressing strip 3 moves upward along the gap between the first flange 11 and the second flange 21, so that the lower bottom edge 34 of the rubber pressing strip 3 is at a certain distance from the outer side of the second cable tube 2, and then the head end of the second cable tube 2 slides to a suitable position along the first cable tube 1, and the lower bottom edge 34 of the rubber pressing strip 3 is again closely attached to the outer side of the second cable tube 2 to fix the position of the second cable tube 2. Therefore, the present invention can automatically make instant adjustments according to the real-time length changes of the open deck.

[0073] Embodiment 3:

[0074] The basic content is the same as that of Example 2, except that: the upper top edge 31 is a 5 mm straight edge, the lower bottom edge 34 is a 25 mm straight edge, the vertical distance from the upper top edge 31 to the lower bottom edge 34 is 20 mm, the second left side 33 and the second right side 35 are respectively perpendicular to the lower bottom edge 34, the second left side 33 and the second right side 35 are both 5 mm straight edges, and the straight-line distance between the endpoints of the upper top edge 31 and the lower bottom edge 34 is 10 mm.

[0075] When used, since the rubber compression strip 3 needs to be fixed and extended with the first flange 11, the second flange 21, the first cable tube 1, and the second cable tube 2, and considering the actual problems such as the deadweight and manufacturing cost of the cable box expansion joint, the size of the rubber compression strip 3 should not be too large; a straight edge with an upper top edge 31 of 5 mm can be selected to keep a 5 mm spacing between the first flange 11 and the second flange 21. When the length of the deck changes due to strain, it slides upward along the spacing between the first flange 11 and the second flange 21 to produce a telescopic effect; a straight edge with a lower bottom edge 34 of 25 mm is selected , the contact area between the bottom edge 34 and the outer surface of the second cable tube 2 can be increased to enhance the friction force; the vertical distance from the upper top edge 31 to the lower bottom edge 34 is selected to be 20 mm, and the diameter A of the central circular hole of the second flange 21 is matched to fix the second cable tube 2; the straight-line distance between the end points of the upper top edge 31 and the lower bottom edge 34 is selected to be 10 mm, and the second left side 33 and the second right side 35 are both 5 mm straight edges perpendicular to the lower bottom edge 34, so that the shape of the rubber pressing strip 3 is symmetrical and small at the top and large at the bottom, and it can smoothly move along the gap between the first flange 11 and the second flange 21.

[0076] Embodiment 4:

[0077] The basic content is the same as Example 1, except that: the head end of the first cable tube 1 is inserted into the cable box 4, and the insertion depth B of the first cable tube is 20-70mm; the head end of the second cable tube 2 is inserted into the first cable tube 1, and the insertion depth C of the second cable tube is 50-100mm; the pipe-box distance D between the bottom of the first flange 11 and the cable box 4 contacted by the first cable tube 1 is 150-250mm; the pipe diameter model of the first cable tube 1 is one level or two levels larger than the pipe diameter model of the second cable tube 2; the first cable tube 1 and the second cable tube 2 are both seamless steel tubes.

[0078] When in use, the diameter of the first cable tube 1 is determined according to the diameter model of the second cable tube 2, and the head end of the first cable tube 1 is inserted into the cable box 4 for fixed connection, and then the head end of the second cable tube 2 is inserted into the first cable tube 1, and the insertion depth B of the first cable tube is maintained at 20-70mm, and the insertion depth C of the second cable tube is maintained at 50-100mm, so that the first cable tube 1 and the second cable tube 2 maintain a good connection relationship on one side of the cable box 4. At the same time, the insertion depth B of the first cable tube, the insertion depth C of the second cable tube, and the tube-box distance D are maintained within a reasonable range, and the installation of the cable 5 inside the cable box 4, the first cable tube 1, and the second cable tube 2 will not be affected by being too long; nor will the second cable tube 2 fall off from the first cable tube 1 during the telescopic process due to being too short, thereby affecting the telescopic effect.

[0079] Embodiment 5:

[0080] The basic content is the same as that of Example 1, except that: a beveled edge corresponding to the first left side 32 of the rubber pressure strip 3 is provided at the lower interface of the first flange 11, and a beveled edge corresponding to the first right side 36 of the rubber pressure strip 3 is provided at the lower interface of the second flange 21; a plurality of through holes are provided on the circumference of the first flange 11, and a plurality of through holes corresponding to the through holes of the first flange 11 are provided on the circumference of the second flange 21; the bolts 13 pass through the through holes of the first flange 11 and the through holes of the second flange 21 and are threadedly connected with the nuts 14; the first flange 11 and the second flange 21 are full-plane blind steel flanges, and the diameter A of the central circular holes of the first flange 11 and the second flange 21 is determined according to the pipe diameter model of the second cable pipe 2; the diameter A of the central circular holes of the first flange 11 and the second flange 21 are both 7-11 mm larger than the outer diameter of the second cable pipe 2.

[0081] When in use, the diameter A of the circular holes in the middle of the first flange 11 and the second flange 21 is determined according to the pipe diameter model of the second cable tube 2, and then the models of the bolts 13 and the nuts 14 are determined according to the models of the flanges, and then the first flange 11, the second flange 21, the bolts 13, the nuts 14, the first cable tube 1, and the second cable tube 2 of corresponding models are connected. The appropriate expansion joint can be selected according to different scenarios, with a wider range of applications, and the material cost can be reduced under the premise of ensuring the expansion effect; at the same time, the first flange 11 and the second flange 21 sandwich the rubber compression strip 3 in the middle, and the first flange 11 and the second flange 21 are fixed by the matching bolts 13 and nuts 14, so as to fix the position of the second cable tube 2. The fixing method of the bolts 13 and the nuts 14 is convenient, and no welding process is required, which reduces the installation cost and improves the installation efficiency.

[0082] Embodiment 6:

[0083] The basic contents are the same as those of Embodiment 1, except that the materials of the first flange 11 and the second flange 21 are consistent with the materials of the first cable tube 1 and the second cable tube 2 .

[0084] When used, the material of the first flange 11 and the second flange 21 is selected to be consistent with the material of the first cable tube 1 and the second cable tube 2, which can ensure the consistency and reliability of the connection, and make the first flange 11 and the second flange 21 have similar thermal expansion coefficients as the first cable tube 1 and the second cable tube 2, which helps to maintain the tightness and sealing of the connection when the temperature changes.

[0085] Embodiment 7:

[0086] The basic contents are the same as those of the first embodiment, except that the first cable tube 1 , the first flange 11 , the second cable tube 2 , the second flange 21 , the bolts 13 and the nuts 14 are subjected to surface treatment as a whole.

[0087] When used, the first cable pipe 1, the first flange 11, the second cable pipe 2, the second flange 21, the bolts 13 and the nuts 14 are subjected to surface treatment such as hot-dip galvanizing, hot-dip galvanizing or shop primer as a whole. Not only can the corrosion resistance, aesthetics, stability and reliability of the expansion joint of the present invention be improved through surface treatment, and the service life of the present invention can be extended, but the overall surface treatment method also reduces the production cost.

[0088] Embodiment 8:

[0089] The basic contents are the same as those of the first embodiment, except that: the corresponding models of the first cable tube 1, bolts 13, nuts 14, first flange 11 and second flange 21 can be selected and matched according to the specifications of the second cable tube 2 described below.

[0090]

[0091] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker, characterized by: The cable box expansion joint adapted to the strain of the open deck of a large oil tanker comprises a first cable tube (1), a first flange (11), a second cable tube (2), a second flange (21), a rubber pressure strip (3), a plurality of gaskets (12), a plurality of bolts (13), and a plurality of nuts (14); the diameter of the first cable tube (1) is larger than the diameter of the second cable tube (2); the first flange (11) and the second flange (21) are of the same model; and the models of the first cable tube (1), the second cable tube (2), the first flange (11), the second flange (21), the bolts (13), and the nuts (14) are matched with each other; One end of the first cable tube (1) is fixedly connected to the cable box (4), the rear end of the first cable tube (1) is fixedly connected to the middle of the first flange (11), and one end of the second cable tube (2) is inserted into the first cable tube (1); the rubber pressure strip (3) is annular, the inner diameter of the rubber pressure strip (3) is the same as the outer diameter of the second cable tube (2), the rubber pressure strip (3) is sleeved on the second cable tube (2), and is connected to the lower interface of the first flange (11). The second flange (21) is sleeved on the middle part of the second cable tube (2); the lower interface of the second flange (21) contacts the rubber pressure strip (3); a plurality of gaskets (12) are sleeved between the first flange (11) and the second flange (21); the first flange (11) and the second flange (21) are fixedly connected by bolts (13) and nuts (14); and the rubber pressure strip (3) is clamped between the first flange (11) and the second flange (21).

2. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker according to claim 1, characterized in that: The cross-sectional shape of the rubber pressure strip (3) is a hexagon. The cross-sectional shape of the rubber pressure strip (3) comprises an upper top edge (31), a first left side edge (32), a second left side edge (33), a lower bottom edge (34), a second right side edge (35), and a first right side edge (36). One end of the upper top edge (31) is connected to one end of the first left side edge (32), the other end of the first left side edge (32) is connected to one end of the second left side edge (33), the other end of the second left side edge (33) is connected to one end of the lower bottom edge (34), the other end of the lower bottom edge (34) is connected to one end of the second right side edge (35), the other end of the second right side edge (35) is connected to one end of the first right side edge (36), and the other end of the first right side edge (36) is connected to the other end of the upper top edge (31); The lower bottom edge (34) contacts the outer side of the second cable tube (2), the first left side edge (32) contacts the lower interface of the first flange (11), and the first right side edge (36) contacts the lower interface of the second flange (21); The upper top edge (31), the first left side edge (32), the second left side edge (33), the lower bottom edge (34), the second right side edge (35), and the first right side edge (36) are all straight edges, and the second left side edge (33) and the second right side edge (35) are respectively perpendicular to the lower bottom edge (34).

3. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker according to claim 2, characterized in that: The material of the rubber pressing strip (3) is chloroprene rubber.

4. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker according to claim 1, 2 or 3, characterized in that: The head end of the first cable tube (1) is inserted into the cable box (4), and the insertion depth (B) of the first cable tube is 20-70 mm; The head end of the second cable tube (2) is inserted into the first cable tube (1), and the insertion depth (C) of the second cable tube is 50-100 mm; The pipe-box distance (D) between the bottom of the first flange (11) and the cable box (4) contacted by the first cable pipe (1) is 150-250 mm.

5. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker according to claim 4, characterized in that: The diameter model of the first cable tube (1) is one level or two levels larger than the diameter model of the second cable tube (2).

6. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker according to claim 4, characterized in that: The first cable pipe (1) and the second cable pipe (2) are both seamless steel pipes.

7. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker according to claim 1, 2 or 3, characterized in that: The lower interface of the first flange (11) is provided with a beveled edge that is compatible with the first left side (32) of the rubber pressure strip (3), and the lower interface of the second flange (21) is provided with a beveled edge that is compatible with the first right side (36) of the rubber pressure strip (3); The first flange (11) is provided with a plurality of through holes on its circumference, and the second flange (21) is provided with a plurality of through holes on its circumference corresponding to the through holes of the first flange (11) on a one-to-one basis. The bolts (13) are threadedly connected to the nuts (14) after passing through the through holes of the first flange (11) and the through holes of the second flange (21).

8. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker according to claim 7, characterized in that: The first flange (11) and the second flange (21) are full-plane blind steel flanges, and the diameter (A) of the central circular hole of the first flange (11) and the second flange (21) is determined according to the pipe diameter model of the second cable pipe (2); The diameters (A) of the central circular holes of the first flange (11) and the second flange (21) are both 7-11 mm larger than the outer diameter of the second cable tube (2).

9. A cable box expansion joint adapted to the strain of the open deck of a large oil tanker according to claim 7, characterized in that: The material of the first flange (11) and the second flange (21) is consistent with the material of the first cable tube (1) and the second cable tube (2).

10. A cable box expansion joint adapted to the strain of an open deck of a large oil tanker according to claim 1, 2 or 3, characterized in that: The first cable tube (1), the first flange (11), the second cable tube (2), the second flange (21), the bolts (13) and the nuts (14) are subjected to surface treatment as a whole.

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