Cable fixing structure, construction structure and establishment method in high-drop narrow space

Abstract

The present invention discloses a fixing structure, a construction structure and an establishing method for cables in a narrow space with a high drop. Through the cooperation among a standard connecting rod, a connecting rod flange, a lifting flange, an upper lifting ring provided on the lifting flange, a high-lift bridge crane connected to the upper lifting ring through a lifting hook, and a flange fixing clamp, the standard connecting rod can be installed and removed section by section, which reduces the difficulty of installation and maintenance and can ensure the safety of construction workers during the construction process; through the cooperation among the high-lift bridge crane, the standard connecting rod and the winch, the standard connecting rod on which the high-drop cable is laid can be smoothly inserted into the cable casing. In addition, a guiding device is provided on the standard connecting rod (or supporting rod) at the bottom of the fixing structure of the cable in the narrow space with a high drop. The guiding effect of the guiding device can prevent the cable bound on the lowest standard connecting rod (or supporting rod) from scratching the cable casing and damaging the cable.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy and hydropower, and in particular relates to a fixing structure, a construction structure and an establishing method of a cable in a narrow space with a high drop. Background Art

[0002] In some special projects, such as the seepage drainage system of dams and cushion ponds, submersible deep well pumps are installed to pump out the collected seepage water from the corridors at the bottom of dams and cushion ponds. In order to facilitate the inspection and maintenance of equipment, an inspection platform is set up in the water collection well pump room. An electrical room is set up at a higher place above the platform of the water collection well pump room. The water pump lifting pipe between the electrical room and the water collection well pump room is buried. The submersible deep well pump group can be lifted out to the electrical room through the water collection well inspection platform and the lifting shaft by using the lifting equipment on the water collection well inspection platform and the high-lift bridge machine in the electrical room, and then transported to the ground for inspection and replacement, while the cable needs to be laid and fixed by setting a casing. The laying scheme of high-drop cables is either to lay through a narrow space such as a steel pipe with a smaller diameter, or to fix along the wall through a larger space. However, due to the high drop between the water collection well pump room and the electrical pump room, there is no place to fix the cable if it is laid through a smaller space. For hanging cables with high drop height, due to their heavy weight, they will bear large tension in the vertical direction. Fixing them at the wellhead will have a great impact or damage to the structure of the cable itself. Putting aside this restriction, due to the long cable and small space, during the cable laying and dragging process, the cable will inevitably scrape against the inner wall of the casing, which is easy to damage the cable and have a great impact on the safe operation of the cable. For laying and fixing cables in a large space, due to the large drop, it is difficult to construct fixed facilities, and the safety of personnel during the construction process is also low.

[0003] Therefore, in the process of implementing the innovative design of the above-mentioned pumping system, the fixing and laying of cables in a narrow space with a high drop as well as the subsequent inspection and maintenance have become key factors restricting the design of this system. Through research, the following problems need to be solved urgently:

[0004] (1) Cable fixing and laying methods in high-drop and narrow spaces; (2) Cable drag protection measures in high-drop and narrow spaces; (3) Cable heat dissipation and moisture drainage measures in high-drop and narrow spaces; 4 Cable replacement plans in high-drop and narrow spaces. Summary of the invention

[0005] The first object of the present invention is to provide a cable fixing structure in a narrow space with a high drop, in view of the deficiencies mentioned in the background technology.

[0006] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0007] A fixing structure for cables in a narrow space with a high drop, the fixing structure for cables in a narrow space with a high drop comprising a cable casing, a wellhead flange seat being provided at the upper end of the cable casing, a lifting flange being provided on the wellhead flange seat, a standard connecting rod being connected to the lower end of the lifting flange, a plurality of standard connecting rods being arranged in sequence from top to bottom in the cable casing, a connecting rod flange being provided between two adjacent standard connecting rods, a cable groove being provided near the upper part of the connecting rod flange, the cable groove being used for limiting the distance between the high drop cable and the standard connecting rod and for fixing the cable; a high drop cable passing through the connecting rod flange from top to bottom is also provided in the cable casing.

[0008] While adopting the above technical solutions, the present invention may also adopt or combine the following further technical solutions:

[0009] Preferably, a cable heat dissipation vent pipe connected to the cable bushing is provided at the upper end of the lifting flange.

[0010] Preferably, an upper lifting ring is provided at the upper end of the lifting flange.

[0011] Preferably, a drain pipe is provided at the lower end of the cable casing, and the drain pipe is used to drain condensed water in the cable casing downwards.

[0012] Preferably, a support rod is connected under the lowermost connecting rod flange, and the lower part of the support rod is connected to a base flange arranged at the bottom of the cable casing.

[0013] The second object of the present invention is to provide a construction structure for fixing cables in a narrow space with a high drop, in view of the deficiencies mentioned in the background technology.

[0014] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0015] A construction structure for fixing a cable in a narrow space with a high drop, the construction structure for fixing a cable in a narrow space with a high drop comprising the aforementioned fixing structure for a cable in a narrow space with a high drop, wherein a lower lifting ring is provided at the bottom of a standard connecting rod at the bottom of the fixing structure for a cable in a narrow space with a high drop; the construction structure for fixing a cable in a narrow space with a high drop is further provided with a winch below the fixing structure for a cable in a narrow space with a high drop, a steel wire rope is wound around the winch, and the other end of the steel wire rope is connected to the lower lifting ring; an upper lifting ring is provided at the upper end of the lifting flange, and the upper lifting ring is connected to the hook of a high-lift bridge crane; during the construction process, a flange fixing clamp is provided below the connecting rod flange where the cable casing is exposed, and the lower surface of the flange fixing clamp is resting on the top of the cable casing.

[0016] While adopting the above technical solutions, the present invention may also adopt or combine the following further technical solutions:

[0017] Preferably, a guide device is provided on the standard connecting rod at the bottom of the cable fixing structure in the narrow space with a high drop, and the guide device is arranged above the lower lifting ring. The guide device includes a connecting rod flange, and a standard connecting rod passes through and is fixed in the connecting rod flange. Guide rods extending toward the inner wall of the cable sheath are provided around the connecting rod flange, and a spring ring is sleeved on the guide rod. The spring ring is connected to a rotatable guide ball at the end away from the connecting rod flange.

[0018] Preferably, the upper end of the high-drop cable in the cable casing is connected to a cable drum.

[0019] Another object of the present invention is to provide a method for establishing a cable fixing structure in a narrow space with a high drop, in view of the deficiencies mentioned in the background technology.

[0020] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0021] A method for establishing a fixing structure for cables in a narrow space with a high drop, the method comprising the following steps: connecting a hook of a high-lift bridge crane with an upper lifting ring provided on a lifting flange, then installing a support rod below the lifting flange, installing a connecting rod flange on the support rod, and installing a cable clamping groove near a position above the connecting rod flange on the support rod, tying the lower end of the high-drop cable to the support rod through the cable clamping groove, installing a lower lifting ring at the bottom of the support rod, and connecting the lower lifting ring to a steel wire rope connected to a winch; placing a flange fixing clamping ring on the top of a cable casing, and placing the connecting rod flange on the support rod Place it on the flange fixing clamp; remove the connection between the support rod and the lifting flange, and then connect the upper end of the standard connecting rod to the lifting flange, connect the lower end of the standard connecting rod to the support rod through the connecting rod flange, and then use the high-lift bridge crane to lift the lifting flange and remove the flange fixing clamp, slowly place the standard connecting rod into the cable casing until the lower surface of the connecting rod flange is close to the top of the cable casing below it, and at the same time start the winch to slowly reel the wire rope in the cable casing into the winch, and then insert the flange fixing clamp under the connecting rod flange, and repeat the above operations until all standard connecting rods with high-drop cables are placed in the cable casing.

[0022] The present invention provides a fixing structure, a construction structure and an establishing method for cables in a high-drop narrow space. Through the cooperation among a standard connecting rod, a connecting rod flange, a lifting flange, an upper lifting ring provided on the lifting flange, a high-lift bridge crane connected to the upper lifting ring through a hook, and a flange fixing clamp, the standard connecting rod can be installed and removed section by section, which reduces the difficulty of installation and maintenance and can ensure the safety of construction workers during the construction process; through the cooperation among the high-lift bridge crane, the standard connecting rod and the winch, the standard connecting rod on which the high-drop cable is laid can be smoothly inserted into the cable sheath; in addition, a guide device is provided on the standard connecting rod (or support rod) at the bottom of the fixing structure of the cable in the high-drop narrow space. The guiding effect of the guide device can prevent the cable bound on the lowest standard connecting rod (or support rod) from scratching the cable sheath and damaging the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is an overall schematic diagram of the cable fixing structure in a narrow space with a high drop provided by the present invention.

[0024] Figure 2 This is a schematic diagram of establishing or dismantling the cable fixing structure in a narrow space with a high drop provided by the present invention.

[0025] Figure 3a for Figure 2 The plan view at a in the middle; Figure 3b for Figure 2 The plan view at point b in the middle; Figure 3c is the plane diagram at c. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] A cable fixing structure in a narrow space with a high drop includes a cable casing 1, a wellhead flange seat 2 is provided at the upper end of the cable casing 1, a lifting flange 3 is provided on the wellhead flange seat 2, a standard connecting rod 4 is connected to the lower end of the lifting flange 3, a plurality of standard connecting rods 4 are sequentially provided in the cable casing 1 from top to bottom, a connecting rod flange 5 is provided between two adjacent standard connecting rods 4, and a high drop cable 6 passing through the connecting rod flange 5 from top to bottom is also provided in the cable casing 1. A cable heat dissipation vent 7 connected to the cable casing 1 is provided at the upper end of the lifting flange 3. An upper lifting ring 8 is provided at the upper end of the lifting flange 3. A drain pipe 9 is provided at the lower end of the cable casing 1, and the drain pipe 9 is used to discharge condensed water in the cable casing 1 downward. A cable clamping groove 10 is provided near the upper part of the connecting rod flange 5, and the cable clamping groove 10 is used to limit the distance between the high drop cable 6 and the standard connecting rod 4 and to fix the cable. The lowermost connecting rod flange 5 is connected to a support rod 11, and the lower part of the support rod 11 is connected to a base flange 12 arranged at the bottom of the cable sleeve 1. The upper end of the high drop cable 6 is connected to an electrical cabinet 13, and the lower end thereof is connected to various valves, water pumps, etc.

[0028] During the construction process of the cable fixing structure in the narrow space with a high drop, there is also a construction structure of the cable fixing structure in the narrow space with a high drop, including the cable fixing structure in the narrow space with a high drop mentioned above, and the bottom of the standard connecting rod 4 at the bottom of the cable fixing structure in the narrow space with a high drop is provided with a lower lifting ring 14; the construction structure of the cable fixing structure in the narrow space with a high drop is also provided with a winch 15 below the cable fixing structure in the narrow space with a high drop, and a steel wire rope 16 is wound around the winch 15, and the other end of the steel wire rope 16 is connected to the lower lifting ring 14; an upper lifting ring 8 is provided at the upper end of the lifting flange 3, and the upper lifting ring 8 is connected to the hook 18 of the high-lift bridge crane 17; during the construction process, a flange fixing clamp 19 is provided below the connecting rod flange 5 exposed from the cable casing 1, and the lower surface of the flange fixing clamp 19 is mounted on the top of the cable casing 1 and is used to clamp and support the connecting rod flange 5 at the lower end of each standard connecting rod 4 that needs to be installed.

[0029] In order to facilitate the standard connecting rod 4 with high-drop cable 6 to pass through the cable casing 1, a guide device can also be provided on the standard connecting rod 4 or support rod 11 at the bottom of the cable fixing structure in the narrow space with high drop. The guide device is arranged above the lower lifting ring 14, and the guide device includes a connecting rod flange 5, and the standard connecting rod 4 passes through and is fixed in the connecting rod flange 5. The connecting rod flange 5 is surrounded by a guide rod 20 extending toward the inner wall of the cable casing 1. A spring ring 21 is sleeved on the guide rod 20, and a rotatable guide ball 22 is connected to the spring ring 21 at one end away from the connecting rod flange 5. During the construction process, the upper end of the high-drop cable 6 in the cable casing 1 is connected to the cable drum 23.

[0030] The fixing structure of the cable in a narrow space with a high drop is specifically established in the following manner: connect the hook of the high-lift bridge crane with the upper lifting ring provided on the lifting flange, then install a support rod under the lifting flange, install a connecting rod flange on the support rod, and install a cable clamp near the position above the connecting rod flange on the support rod. Tie the lower end of the high-drop cable to the support rod through the cable clamp, install a lower lifting ring at the bottom of the support rod, and connect the lower lifting ring to the steel wire rope connected to the winch; place the flange fixing clamp on the top of the cable casing, and place the connecting rod flange on the support rod on the flange fixing clamp; remove Connect the support rod to the lifting flange, then connect the upper end of the standard connecting rod to the lifting flange, connect the lower end of the standard connecting rod to the support rod through the connecting rod flange, then use the high-lift bridge crane to lift the lifting flange and remove the flange fixing ring, slowly place the standard connecting rod into the cable casing until the lower surface of the connecting rod flange is close to the top of the cable casing below it, and at the same time start the winch to slowly reel the wire rope in the cable casing into the winch, and then insert the flange fixing ring under the connecting rod flange, repeat the above operations until all standard connecting rods with high-drop cables are placed in the cable casing.

[0031] Similarly, the method for dismantling the cable fixing structure in a high-drop narrow space is carried out in the opposite steps of the method for establishing the cable fixing structure in a high-drop narrow space, that is, the cable fixing structure in a high-drop narrow space can be dismantled.

[0032] This embodiment is specifically described using a high-drop dam as an example. Obviously, the cable fixing structure, construction structure and establishment method in a high-drop narrow space provided by the present invention can also be applied to other high-drop narrow space scenarios, and all fall within the protection scope of the present invention.

[0033] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. The cable fixing structure in a narrow space with a high drop is characterized by: The fixing structure of the cable in the narrow space with a high drop comprises a cable casing, a wellhead flange seat is provided at the upper end of the cable casing, a lifting flange is provided on the wellhead flange seat, the lower end of the lifting flange is connected to a standard connecting rod, a plurality of standard connecting rods are arranged in sequence from top to bottom in the cable casing, a connecting rod flange is provided between two adjacent standard connecting rods, a cable groove is provided near the upper part of the connecting rod flange, the cable groove is used to limit the distance between the high drop cable and the standard connecting rod and to fix the cable; the cable casing is also provided with a high drop cable passing through the connecting rod flange from top to bottom; The upper end of the lifting flange is provided with a cable heat dissipation vent pipe connected to the cable bushing; A drain pipe is provided at the lower end of the cable casing, and the drain pipe is used to drain condensed water in the cable casing downwards.

2. The cable fixing structure in a narrow space with a high drop according to claim 1 is characterized in that: An upper lifting ring is arranged at the upper end of the lifting flange.

3. The cable fixing structure in a narrow space with a high drop according to claim 1 or 2, characterized in that: A support rod is connected under the lowermost connecting rod flange, and the lower part of the support rod is connected to a base flange arranged at the bottom of the cable sleeve.

4. A construction structure for fixing a cable in a narrow space with a high drop, characterized in that: The construction structure of the cable fixing structure in a narrow space with a high drop comprises the cable fixing structure in a narrow space with a high drop as described in claim 1, and a lower lifting ring is provided at the bottom of the standard connecting rod at the bottom of the cable fixing structure in a narrow space with a high drop; the construction structure of the cable fixing structure in a narrow space with a high drop is also provided with a winch below the cable fixing structure in a narrow space with a high drop, and a steel wire rope is wound around the winch, and the other end of the steel wire rope is connected to the lower lifting ring; an upper lifting ring is provided at the upper end of the lifting flange, and the upper lifting ring is connected to the hook of the high-lift bridge crane; during the construction process, a flange fixing clamp is provided below the connecting rod flange exposed from the cable sheathing, and the lower surface of the flange fixing clamp is resting on the top of the cable sheathing.

5. The construction structure of the cable fixing structure in a high drop narrow space according to claim 4, characterized in that: A guide device is provided on the standard connecting rod at the bottom of the cable fixing structure in the narrow space with a high drop. The guide device is arranged above the lower lifting ring. The guide device includes a connecting rod flange. The standard connecting rod passes through and is fixed in the connecting rod flange. Guide rods extending toward the inner wall of the cable casing are provided around the connecting rod flange. A spring ring is sleeved on the guide rod. A rotatable guide ball is connected to the end of the spring ring away from the connecting rod flange.

6. The construction structure of the cable fixing structure in a high-drop narrow space according to claim 4, characterized in that: The upper end of the high-drop cable in the cable sleeve is connected to the cable drum.

7. A method for establishing a cable fixing structure in a narrow space with a high drop, characterized in that: The method for establishing a cable fixing structure in a narrow space with a high drop comprises the following steps: connecting the hook of the high-lift bridge crane with the upper lifting ring provided on the lifting flange, then installing a support rod below the lifting flange, installing a connecting rod flange on the support rod, installing a cable clamping groove near the position above the connecting rod flange on the support rod, tying the lower end of the high-drop cable to the support rod through the cable clamping groove, installing a lower lifting ring at the bottom of the support rod, and connecting the lower lifting ring to the steel wire rope connected to the winch; placing the flange fixing clamping ring on the top of the cable casing, and placing the connecting rod flange on the support rod on the flange fixing clamping ring; removing In addition to the connection between the support rod and the lifting flange, the upper end of the standard connecting rod is connected to the lifting flange, and the lower end of the standard connecting rod is connected to the support rod through the connecting rod flange. Then use the high-lift bridge crane to lift the lifting flange and remove the flange fixing ring. Slowly place the standard connecting rod into the cable casing until the lower surface of the connecting rod flange is close to the top of the cable casing below it. At the same time, start the winch to slowly reel the wire rope in the cable casing into the winch, and then insert the flange fixing ring under the connecting rod flange. Repeat the above operations until all standard connecting rods with high-drop cables are placed in the cable casing.

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