Cable wiring device and engineering machinery
By designing the cable wiring device, using tapered seals and multiple sealing structures, the problem of water leakage in mechanical cable connections in the underground continuous wall construction is solved, and high reliability and easy-to-maintenance cable connection is achieved, ensuring the continuity and safety of construction.
Patent Information
- Application Number
- CN202422326181.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The cable connection structure of existing underground continuous wall construction machinery is prone to leakage under mud and water pressure, resulting in short circuits of wires and affecting construction efficiency and progress.
A cable wiring device is designed, including a cable mounting barrel and an end cover. Through a tapered seal and a multiple sealing structure, it ensures a reliable connection between the cable and the electrical control box, and is fixed to the center of the grab after the cable is installed to avoid stress shaking.
Improves the seal reliability of cable connections, reduces cable shaking due to grab movement, ensures continuity and safety of construction, and is easy to install and maintain.
Smart Images
Figure CN223141496U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of construction machinery, in particular to a cable connection device and a construction machinery. Background Art
[0002] A diaphragm wall refers to a continuous wall constructed underground for supporting the load of a building, intercepting water and preventing seepage, or retaining soil. At present, due to the increasing number of subway and other underground projects in cities and high-rise buildings that require deep foundation construction, the application of diaphragm walls is also increasing. A diaphragm wall is formed by using a trench digging machine, with the help of the mud retaining wall effect, to dig a narrow and deep trench underground and pour appropriate materials into it to form a continuous underground wall with functions of water seepage prevention, soil retaining, and load bearing. And the diaphragm wall construction machinery is such a trench digging machine used for diaphragm wall construction. The working principle of the diaphragm wall construction machinery is to use a hydraulic grab to punch holes and use its closing to grab the mud and transport it to a designated location.
[0003] When a hydraulic grab of a diaphragm wall forms a trench, with the help of the mud retaining wall effect, a narrow and deep trench is dug underground, and the deepest trench forming depth can reach 80 meters. During the excavation process, the control cable moves up and down reciprocally in the mud dozens of meters deep underground along with the grab body. In the existing connection structure between the grab and the cable of the diaphragm wall construction machinery, the cable is connected into a cable connection cylinder located at the upper end of the grab from above the grab. Due to the relatively large water pressure of the mud dozens of meters deep, if the cable sealing joint is unreliable, it is easy to leak water and cause faults such as short circuits of the wires, which will surely affect the construction efficiency and progress. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a cable connection device and a construction machinery with high sealing reliability, convenient use and maintenance.
[0005] The utility model provides a cable connection device for sealing a cable and connecting the cable to an electric control box. The cable connection device includes a cable installation cylinder and an end cover. The cable installation cylinder is hermetically connected to the end cover, and the cable installation cylinder is fixedly connected to the electric control box. The cable installation cylinder includes a sealing cover. A wiring cavity is arranged inside the cable installation cylinder. The end cover is provided with a through hole for the cable to pass through and extend into the wiring cavity. The cable is connected to a wiring seat of the electric control box in the wiring cavity. The sealing cover is installed to cover the opening of the wiring cavity for sealing the wiring cavity.
[0006] In an embodiment of the present utility model, a tapered through hole with a larger inner diameter at the upper part and a smaller inner diameter at the lower part is provided inside the end cover. The cable connection device further includes a first pressing mechanism and a first seal. The first seal is a tapered seal block with a larger size at the upper part and a smaller size at the lower part. The first seal is received in the tapered through hole and is matched with the tapered through hole. The first pressing mechanism is connected to the end cover and presses the first seal. The cable is hermetically connected to the end cover through the first seal.
[0007] In an embodiment of the present utility model, the first pressing mechanism includes a first locking member and a first pressing block. The first pressing block is received inside the end cover. The first locking member is connected to the end cover. The first locking member presses the first pressing block, and at the same time, the first pressing block presses the first seal.
[0008] In an embodiment of the present utility model, an internal thread is provided on the inner wall of the first locking member, and an external thread is provided on the outer wall of the end cover. The first locking member and the end cover are locked through threaded connection.
[0009] In an embodiment of the present utility model, at least one O-ring seal is provided between the outer wall of the first pressing block and the inner wall of the end cover for sealing, and at least one O-ring seal is provided between the inner wall of the first pressing block and the outer wall of the cable for sealing.
[0010] In an embodiment of the present utility model, the cable connection device further includes a second pressing mechanism and a second seal. The second seal is located at one end of the first seal away from the first pressing mechanism. The second seal is received inside the end cover. The second pressing mechanism is connected to the end cover and presses the second seal. The cable is also hermetically connected to the end cover through the second seal.
[0011] In an embodiment of the present utility model, the second pressing mechanism includes a second locking member and a second pressing block. The second locking member is connected to the end cover. The second locking member presses the second pressing block, and at the same time, the second pressing block presses the second seal.
[0012] In an embodiment of the present utility model, an external thread is provided on the outer wall of the second locking member, and an internal thread is provided on the inner wall of the end cover. The second locking member and the end cover are locked through threaded connection.
[0013] In an embodiment of the present utility model, the second seal is at least one O-ring seal, the number of the second pressing blocks is at least one, and the second seals and the second pressing blocks are alternately stacked.
[0014] The present utility model further provides a construction machinery, including a grab, and the grab includes the cable connection device as described above.
[0015] In the cable wiring device and construction machinery of the present utility model, through the design of the end cover, the cable connection guiding dimension is long, the cable connection is more reliable, and the cable shaking caused by the up and down movement of the grab can be effectively reduced, which affects the sealing effect. A wiring cavity is designed, and wiring can be carried out after the cable is installed and connected to the cable installation cylinder. At this time, the cable length remains unchanged, and the wiring end of the cable will not be stressed, avoiding the cable from being subjected to axial tension. It is integrally fixed at the center of the grab, avoiding the need for deviation correction underwater due to the deviation of the center of gravity, and the design reliability is high; at the same time, it is easy to install and maintain, and damage to the wiring during disassembly is avoided. Description of the Drawings
[0016] Figure 1 It is a schematic structural view of a cable wiring device according to an embodiment of the present utility model.
[0017] Figure 2 It is a side view of a cable wiring device according to an embodiment of the present utility model.
[0018] Figure 3 It is a front view of a cable wiring device according to an embodiment of the present utility model.
[0019] Figure 4 It is a schematic structural view of the end cover of a cable wiring device according to an embodiment of the present utility model. Detailed Embodiment
[0020] The following combines the drawings and embodiments to further describe the detailed embodiments of the present utility model in detail. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.
[0021] The present utility model provides a cable wiring device for sealing a cable 30 and connecting the cable 30 to an electric control box 40, such as Figures 1-3As shown in the figure, the cable connection device of an embodiment includes a cable installation cylinder 10 and an end cover 20. The end cover 20 is a flange cover and is fixedly connected to the cable installation cylinder 10 by bolts. The surfaces in contact between the end cover 20 and the cable installation cylinder 10 are sealed by a plurality of O-ring seals. The cable installation cylinder 10 includes a sealing cover 11. A wiring cavity 12 is provided inside the cable installation cylinder 10. The wiring cavity 12 has two oppositely arranged openings. The electric control box 40 is located at one opening of the wiring cavity 12 and is fixedly connected to the cable installation cylinder 10 in a sealed manner. The wiring seat of the electric control box 40 faces the inside of the wiring cavity 12. The end cover 20 is provided with a through hole 26. The cable 30 passes through the through hole 26 and extends into the wiring cavity 12. The cable 30 is connected to the wiring seat of the electric control box 40 inside the wiring cavity 12. The sealing cover 11 is located at the other opening of the wiring cavity 12. The sealing cover 11 is installed to cover the other opening of the wiring cavity to close the wiring cavity 12. When the sealing cover 11 is opened, installation and maintenance can be carried out, and then the sealing cover 11 is closed after completion.
[0022] In the cable connection device and construction machinery of the present utility model, through the design of the end cover 20, the connection guiding dimension of the cable 30 is long, the connection of the cable 30 is more reliable, and the influence of the cable shaking caused by the up and down movement of the grab on the sealing effect can be effectively reduced. The wiring cavity 12 is designed, and wiring can be carried out after the cable 30 is installed and connected to the cable installation cylinder 10. At this time, the cable length remains unchanged, and the wiring end of the cable 30 is not stressed, avoiding the axial tension of the cable 30. The whole is fixed at the center of the grab, avoiding the need for underwater deviation correction due to the deviation of the center of gravity. The design has high reliability; at the same time, it is easy to install and maintain, and the wiring is avoided from being damaged during disassembly.
[0023] In this embodiment, as Figure 4 shown, the end cover 20 has multiple stages in the height direction. From top to bottom, they are the first section 21, the second section 22, the third section 23, the fourth section 24, and the fifth section 25. Along the direction from the outside to the inside of the cable installation cylinder 10, the first through hole 211, the second through hole 221, the third through hole 231, the fourth through hole 241, and the fifth through hole 251 are respectively provided in the first section 21 to the fifth section 25 of the end cover 20 in sequence. The upper and lower ends of the first through hole 211, the second through hole 221, the third through hole 231, the fourth through hole 241, and the fifth through hole 251 are communicated with each other to form the through hole 26. Among them, the third section 23 protrudes towards the direction close to the cable 30 to form an annular step, so that the third through hole 231 formed in the third section 23 has the smallest inner diameter, and the inner diameters of the first through hole 211, the second through hole 221, the fourth through hole 241, and the fifth through hole 251 are all larger than the inner diameter of the third through hole 231.
[0024] In this embodiment, a tapered through hole with a larger inner diameter at the upper part and a smaller inner diameter at the lower part is provided in the end cap 20. The cable wiring device further includes a first pressing mechanism 50, a first seal 60, a second pressing mechanism 70, and a second seal 80. The first pressing mechanism 50 is connected to the end cap 20 and presses the first seal 60. The second seal 80 is located at one end of the first seal 60 away from the first pressing mechanism 50. The second seal 80 is received in the end cap 20, and the second pressing mechanism 70 is connected to the end cap 20 and presses the second seal 80. The cable 30 is hermetically connected to the end cap 20 through the first seal 60 and the second seal 80.
[0025] Specifically, the cable located outside the cable installation cylinder 10 is sealed between the first seal 60 and the inner wall of the end cap 20. The first pressing mechanism 50 presses the first seal 60 downward, so that the first seal 60 is clamped between the outer wall of the cable 30 and the inner wall of the end cap 20. The second seal 80 is arranged below the first seal 60. The cable 30 located inside the cable installation cylinder 10 is sealed between the second seal 80 and the inner wall of the end cap 20. The second pressing mechanism 70 presses the second seal 80 upward, so that the second seal 80 is clamped and closely attached to the outer wall of the cable 30. In this embodiment, the first seal 60 is a tapered seal block with a larger upper size and a smaller lower size. The second through hole 221 formed in the second section 22 of the end cap 20 is a tapered through hole with a larger inner diameter at the upper part and a smaller inner diameter at the lower part. The first seal 60 is received in the tapered through hole and cooperates with the tapered through hole. The second seal 80 is an O-ring. The number of the second seals 80 can be one or more. The cable 30 sequentially passes through the first pressing mechanism 50, the first seal 60, the second seal 80, and the second pressing mechanism 70 and then extends into the wiring cavity 12 of the cable installation cylinder 10.
[0026] In this embodiment, the first pressing mechanism 50 includes a first locking member 51 and a first pressing block 52, and the first pressing block 52 is received in the first through hole 211. In this embodiment, the first locking member 51 can be a nut. The inner wall of the first locking member 51 is provided with internal threads, and the outer wall of the first section 21 of the end cover 20 is provided with external threads. The first locking member 51 and the outer wall of the first section 21 are locked by threaded connection. The second through hole 221 is conical and its inner diameter gradually increases from the end close to the third through hole 231 to the end close to the first through hole 211. The first sealing member 60 is received in the second through hole 221 and is matched with the second through hole 221. A washer can be provided between the first pressing block 52 and the first locking member 51. The first pressing block 52 presses the first sealing member 60 under the push of the first locking member 51. In this way, by adjusting the tightening position of the first locking member 51 on the end cover 20, the first pressing block 52 can be pressed downward, and then the first sealing member 60 can be pressed downward, so that the inner surface of the first sealing member 60 is completely and closely attached to the outer wall of the cable 30, and at the same time, a complete seal is formed between the first sealing member 60 and the end cover 20. In addition, by adjusting the number of washers, the compression amount of the first sealing member 60 can be further adjusted, and the influence of the different diameters of each cable caused by manufacturing reasons on the sealing performance can be effectively eliminated.
[0027] It can be understood that a washer may not be provided between the first locking member 51 and the first pressing block 52, and the first locking member 51 directly presses the first pressing block 52. In addition, other connection methods such as bolt connection, snap connection, and flange connection can also be used for the connection between the first locking member 51 and the end cover 20, as long as the first pressing block 52 can be pressed downward. It should be noted that in this embodiment, the threaded connection between the first locking member 51 and the outer wall of the first section 21 is only a preferred method, which can prevent external mud from directly penetrating around the first pressing block 52.
[0028] Furthermore, at least one O-ring is provided between the outer wall of the first pressing block 52 and the inner wall of the first section 21 for sealing, and at least one O-ring is provided between the inner wall of the first pressing block 52 and the outer wall of the cable 30 for sealing, so as to form an initial seal before the first sealing member 60, which can play a role in initially preventing water and dust from entering, increasing cable guidance and reducing cable shaking.
[0029] In this embodiment, the second pressing mechanism 70 includes a second locking member 71 and a second pressing block 72. The second locking member 71 is connected to the end cover 20. The second locking member 71 presses the second pressing block 72, and at the same time, the second pressing block 72 presses the second sealing member 80.
[0030] Specifically, the second locking member 71 can be a nut. The outer wall of the second locking member 71 is provided with an external thread, and the inner wall of the fifth section 25 of the end cover 20 is provided with an internal thread. The second locking member 71 is installed in the fifth through hole 251 and is locked with the inner wall of the fifth through hole 251 by screw connection. The second sealing member 80 is at least one O-ring. The number of the second pressing blocks 72 is at least one. The second sealing member 80 and the second pressing blocks 72 are stacked alternately.
[0031] Specifically, a through hole for accommodating the cable 30 is provided in the middle of the second pressing block 72. The surface of the second pressing block 72 facing the second sealing member 80 is recessed downward to form an annular step surface. The second sealing member 80 is accommodated in the accommodation space formed between the annular step surface of the end cover and the surface of another second pressing block 72. The second pressing block 72 squeezes the second sealing member 80 under the push of the second locking member 71, causing the second sealing member 80 to expand radially and closely fit the cable 30. In this way, by adjusting the tightening position of the second locking member 71 in the fifth through hole 251, the second pressing block 72 can be pressed upward, and then the second sealing member 80 can be squeezed upward, causing the inner ring of the second sealing member 80 to shrink and tightly hold the cable 30, so as to form a tight seal with the cable 30, forming a third seal to further enhance the sealing effect. In addition, according to the actual sealing requirements, the number of the second pressing blocks 72 and the second sealing members 80 can also be adjusted, so as to adjust the number of sealing layers between the cable 30 and the fourth through hole 241.
[0032] It can be understood that the connection between the second locking member 71 and the end cover 20 can also adopt other connection methods such as bolt connection, snap connection, flange connection, etc., as long as the second pressing block 72 can be pressed upward.
[0033] The present utility model also provides a construction machinery, including a grab, and the grab includes the cable connection device as described in any one of the above.
[0034] In summary, the beneficial effects of the cable connection device of the present utility model are as follows: The cable connection device has a simple structure, is convenient to use and maintain, does not require special maintenance tools and maintenance parts, and only ordinary maintenance personnel can quickly connect and disassemble on the construction site, with low maintenance and use costs; The conical sealing block cooperates with the conical through hole of the end cover 20 to form a surface seal, with high sealing reliability; Multiple sealing structures can also be adopted above and below the conical sealing block to further enhance the sealing effect; By squeezing the seal, the adjustment of the compression amount and the shrinkage amount of the inner hole of the seal can be realized, effectively eliminating the influence of the inconsistent cable diameters caused by manufacturing reasons on the sealing performance; Through the design of the end cover 20, the cable connection guiding dimension is long, the cable 30 is more reliably connected, and the influence of the cable shaking caused by the up and down movement of the grab on the sealing effect can be effectively reduced. The wiring cavity 12 is designed, and wiring can be carried out after the cable 30 is installed and connected to the cable installation cylinder 10. At this time, the cable length remains unchanged, and the wiring end of the cable 30 is not stressed, avoiding the axial tension of the cable 30, and being integrally fixed at the center of the grab, avoiding the need for deviation correction underwater due to the deviation of the center of gravity, with high design reliability; At the same time, it is easy to install and overhaul, and damage to the wiring during disassembly is avoided.
[0035] In this article, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.
[0036] In this article, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the sake of clarity of expressing the technical solution and convenience of description. Therefore, it cannot be understood as a limitation to the present utility model.
[0037] In this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.
[0038] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims
1. A cable connection device for sealing a cable (30) and connecting the cable (30) to an electric control box (40), characterized in that, The cable connection device includes a cable installation cylinder (10) and an end cover (20). The cable installation cylinder (10) is hermetically connected to the end cover (20), and the cable installation cylinder (10) is fixedly connected to the electric control box (40). The cable installation cylinder (10) includes a sealing cover (11). A wiring cavity (12) is provided inside the cable installation cylinder (10). A through hole (26) is provided through the end cover (20). The cable (30) passes through the through hole (26) and extends into the wiring cavity (12). The cable (30) is connected to the wiring seat of the electric control box (40) inside the wiring cavity (12). The sealing cover (11) is installed to cover the opening of the wiring cavity (12) for sealing the wiring cavity (12).
2. The cable wiring device according to claim 1, characterized in that, A tapered through hole with a larger inner diameter at the upper part and a smaller inner diameter at the lower part is provided inside the end cover (20). The cable connection device further includes a first pressing mechanism (50) and a first sealing member (60). The first sealing member (60) is a tapered sealing block with a larger size at the upper part and a smaller size at the lower part. The first sealing member (60) is received in the tapered through hole and cooperates with the tapered through hole. The first pressing mechanism (50) is connected to the end cover (20) and presses the first sealing member (60). The cable (30) is hermetically connected to the end cover (20) through the first sealing member (60).
3. The cable connection device according to claim 2, characterized in that, The first pressing mechanism (50) includes a first locking member (51) and a first pressing block (52). The first pressing block (52) is received inside the end cover (20). The first locking member (51) is connected to the end cover (20). The first locking member (51) presses the first pressing block (52), and at the same time, the first pressing block (52) presses the first sealing member (60).
4. The cable wiring device according to claim 3, characterized in that, Internal threads are provided on the inner wall of the first locking member (51), and external threads are provided on the outer wall of the end cover (20). The first locking member (51) and the end cover (20) are locked by threaded connection.
5. The cable connection device according to claim 3, characterized in that, At least one O-ring is provided between the outer wall of the first pressing block (52) and the inner wall of the end cover (20) for sealing, and at least one O-ring is provided between the inner wall of the first pressing block (52) and the outer wall of the cable (30) for sealing.
6. The cable connection device according to claim 2, characterized in that, The cable connection device further includes a second pressing mechanism (70) and a second sealing member (80). The second sealing member (80) is located at one end of the first sealing member (60) away from the first pressing mechanism (50). The second sealing member (80) is received inside the end cover (20). The second pressing mechanism (70) is connected to the end cover (20) and presses the second sealing member (80). The cable (30) is also hermetically connected to the end cover (20) through the second sealing member (80).
7. The cable connection device according to claim 6, characterized in that, The second pressing mechanism (70) includes a second locking member (71) and a second pressing block (72). The second locking member (71) is connected to the end cover (20), and the second locking member (71) presses the second pressing block (72), and at the same time, the second pressing block (72) presses the second sealing member (80).
8. The cable connection device according to claim 7, wherein, The outer wall of the second locking member (71) is provided with an external thread, and the inner wall of the end cover (20) is provided with an internal thread. The second locking member (71) and the end cover (20) are locked by threaded connection.
9. The cable connection device according to claim 7, characterized in that, The second sealing member (80) is at least one O-ring, the number of the second pressing blocks (72) is at least one, and the second sealing members (80) and the second pressing blocks (72) are stacked alternately.
10. An engineering machinery, including a grab bucket, characterized in that, The grab includes the cable wiring device according to any one of claims 1 to 9.