Vertical super-long shaft fire pump for ocean platform

Abstract

The invention provides a vertical super-long-shaft fire pump for an ocean platform. The vertical super-long-shaft fire pump comprises a barrel, an external pipe, a centralizer, a heating device, a driving device, an anti-reversion device, a hydraulic component, a filter screen and a dosing device. According to the vertical super-long-shaft fire pump for the ocean platform, a main shaft of a hydraulic component is a super-slender shaft system, the maximum length of the shaft system reaches 40 m, the shaft system goes deep into seawater, water pumping and fire extinguishing are conducted through cooperation with a driving device, life and property safety is guaranteed, the requirement for safety and reliability is extremely high, and meanwhile through a centralizer fixedly installed on the surface of an external pipe, the pump is prevented from swinging, and the service life of the pump is prolonged. A heating device is used for preventing the phenomenon that seawater in an external connecting pipe is frozen due to cold weather in winter, a filter screen is matched with a dosing device to prevent marine organism growth, an electric fire pump anti-reverse device is arranged on a pump, a diesel fire pump anti-reverse device is arranged on a right-angle gear box, and after a pump shaft stops rotating, the diesel fire pump anti-reverse device is arranged on the right-angle gear box. The pump cannot rotate reversely, and reverse rotation of the pump is effectively prevented.

Description

Vertical ultra-long shaft fire pump for offshore platforms Technical Field

[0001] This invention relates to the field of fire pumps, and more particularly to vertical ultra-long shaft fire pumps for offshore platforms. Background Technology

[0002] The vertical ultra-long shaft fire pump for offshore platforms is a core fire-fighting equipment specifically designed for offshore fixed platforms, FPSOs, etc. It is a vertical, multi-stage, bag-type centrifugal pump driven by an electric motor or diesel engine connected to a right-angle gearbox.

[0003] It draws water directly from the seawater by placing the motor and outlet on the platform deck, while the pump head extends deep into the pump casing via a long shaft, thus ensuring the safety of life and property at sea.

[0004] However, the submerged length of offshore platform pumps is relatively long, which makes them prone to vibration and damage to external pipelines. In addition, the cold winter weather in northern regions may cause seawater inside the external pipelines to freeze, preventing the pumps from starting in time when the fire protection system is activated. Furthermore, marine organisms such as barnacles, algae, and shellfish can grow inside the seawater fire pumps and their piping systems, causing serious operational and maintenance problems. Moreover, incorrect drive motor rotation or pump reversal during shutdown can cause incorrect pump rotation, affecting the pump's performance parameters and service life.

[0005] Therefore, it is necessary to provide vertical ultra-long shaft fire pumps for offshore platforms to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a vertical ultra-long shaft fire pump for offshore platforms, which solves the problem that current vertical long shaft fire pumps are affected by vibration, seawater icing, marine organisms, etc.

[0007] To solve the above-mentioned technical problems, the present invention provides a vertical ultra-long shaft fire pump for offshore platforms, comprising: a cylinder, an external connecting pipe, a centralizer, a heating device, a drive device, hydraulic components, a filter screen, a dosing device, and an anti-reverse device; one end of the external connecting pipe is fixedly installed at the bottom of the cylinder, the centralizer is fixedly installed on the surface of the external connecting pipe, and the heating device is fixedly installed on the surface of the external connecting pipe; the drive device is located at the top of the cylinder, the hydraulic components are fixedly installed at one end of the external connecting pipe and at the output end of the drive device, and the drive device is used to drive the... The hydraulic components operate, and the filter screen is fixedly installed at the input end of the hydraulic components; the dosing device includes a dosing pipe and a titanium ring, the dosing pipe is disposed on the surface of the outer pipe, the titanium ring is connected to the output end of the dosing pipe and fixedly installed on the surface of the filter screen; the anti-reverse device includes a reverse disc, multiple reverse pins, a ratchet disc and multiple ratchet teeth, the reverse disc is disposed inside the cylinder, the multiple reverse pins are slidably connected to the inside of the reverse disc, the ratchet disc is disposed on the surface of the reverse disc, and the bottom of the multiple ratchet teeth is fixedly connected to the top of the ratchet disc.

[0008] Preferably, the hydraulic component includes a guide vane and an impeller, with one end of the guide vane fixedly installed at one end of the outer connecting pipe, and the impeller disposed inside the guide vane.

[0009] Preferably, a bushing is fixedly installed inside the guide vane body, a main shaft is rotatably connected inside the bushing, and a pressure-reducing sleeve is fixedly installed on the surface of the bushing.

[0010] Preferably, there are multiple hydraulic components, and the multiple hydraulic components are installed end to end.

[0011] Compared with related technologies, the vertical ultra-long shaft fire pump for offshore platforms provided by this invention has the following beneficial effects: The vertical ultra-long shaft fire pump for offshore platforms provided by this invention has an ultra-slender shaft system for the main shaft of the hydraulic components, with the longest shaft reaching 40m, extending deep into the seawater. It is used for pumping water and extinguishing fires in conjunction with a drive device, ensuring the safety of life and property. The safety and reliability requirements are extremely high. At the same time, the centralizer fixedly installed on the surface of the external pipe prevents the pump from swinging. The heating device prevents the seawater inside the external pipe from freezing due to cold winter weather. The filter screen and the dosing device prevent the growth of marine organisms. The anti-reverse device of the electric fire pump is set on the pump, and the anti-reverse device of the diesel engine fire pump is set on the right-angle gearbox. When the pump shaft stops rotating, the pump cannot rotate in reverse, effectively preventing the pump from reversing and extending the service life of the pump. Moreover, the hydraulic components have the ability to prevent overload within the entire flow range. Attached Figure Description

[0012] Figure 1 is a structural schematic diagram of the first embodiment of the vertical ultra-long shaft fire pump for offshore platforms provided by the present invention; Figure 2 is a structural schematic diagram of the dosing device shown in Figure 1; Figure 3 is a structural schematic diagram of the hydraulic component shown in Figure 1; Figure 4 is a structural schematic diagram of the anti-reverse device shown in Figure 1; Figure 5 is a structural schematic diagram of the heating device shown in Figure 1; Figure 6 is a structural schematic diagram of the centralizer shown in Figure 1.

[0013] The following are the labels in the diagram: 1. Cylinder body, 2. External pipe, 3. Centralizer, 4. Heating device, 5. Hydraulic components, 51. Guide vane, 52. Bushing, 53. Main shaft, 54. Impeller, 55. Pressure reducing sleeve, 6. Filter screen, 7. Dosing device, 71. Dosing pipe, 72. Titanium ring, 8. Anti-reverse device, 81. Reverse disc, 82. Reverse pin, 83. Ratchet disc, 84. Ratchet tooth. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. Examples

[0015] Please refer to Figures 1, 2, 3, 4, 5, and 6. Figure 1 is a structural schematic diagram of the first embodiment of the vertical ultra-long shaft fire pump for offshore platforms provided by the present invention; Figure 2 is a structural schematic diagram of the dosing device shown in Figure 1; Figure 3 is a structural schematic diagram of the hydraulic component shown in Figure 1; Figure 4 is a structural schematic diagram of the anti-reverse device shown in Figure 1; Figure 5 is a structural schematic diagram of the heating device shown in Figure 1; and Figure 6 is a structural schematic diagram of the centralizer shown in Figure 1. A vertical ultra-long shaft fire pump for offshore platforms includes: a cylinder 1, an external pipe 2, a centralizer 3, a heating device 4, a drive unit, a hydraulic component 5, a filter screen 6, a chemical dosing device 7, and an anti-reverse device 8. One end of the external pipe 2 is fixedly installed at the bottom of the cylinder 1, the centralizer 3 is fixedly installed on the surface of the external pipe 2, and the heating device 4 is fixedly installed on the surface of the external pipe 2. The drive unit is located at the top of the cylinder 1, the hydraulic component 5 is fixedly installed at one end of the external pipe 2 and at the output end of the drive unit, and the drive unit drives the hydraulic component 5 to operate. The filter screen 6 is fixedly installed... The hydraulic component 5 is located at its input end; the dosing device 7 includes a dosing pipe 71 and a titanium ring 72. The dosing pipe 71 is disposed on the surface of the external pipe 2, and the titanium ring 72 is connected to the output end of the dosing pipe 71 and fixedly installed on the surface of the filter screen 6; the anti-reverse device 8 includes a reverse disc 81, multiple reverse pins 82, a ratchet disc 83, and multiple ratchet teeth 84. The reverse disc 81 is disposed inside the cylinder 1, the multiple reverse pins 82 are slidably connected to the inside of the reverse disc 81, the ratchet disc 83 is disposed on the surface of the reverse disc 81, and the bottom of the multiple ratchet teeth 84 are fixedly connected to the top of the ratchet disc 83.

[0016] The driving device is a motor, which is fixedly installed on the top of the cylinder 1.

[0017] In other embodiments, the drive unit may also be a diesel engine with a right-angle gearbox, used to start and drive the main shaft 53 to rotate, thereby enabling the hydraulic component 5 to work.

[0018] Please refer to Figures 1 and 2. A discharge elbow is fixedly installed on one side of the cylinder 1. After the hydraulic component 5 draws water into the outer pipe 2, the water enters the interior of the cylinder 1 and is discharged through the discharge elbow. One end of the fire water pipe is fixedly installed at one end of the discharge elbow, and the discharge elbow discharges water into the interior of the fire water pipe for fire extinguishing.

[0019] Please refer to Figure 6. The split-type centralizer 3 is fixed to the outer diameter of the outer tube 2 with bolts. The outer diameter of the arc-shaped spring is similar to the inner diameter of the casing, which effectively fixes the outer tube 2 and prevents it from swinging.

[0020] The heating device 4 is a semi-circular heating tube. The heating device 4 is installed on the surface of the outer pipe 2 and is located at sea level to prevent the seawater inside the outer pipe 2 from freezing due to cold winter weather.

[0021] The filter screen 6 is used to filter the seawater entering the impeller 54 to prevent debris, marine life, etc. from entering the outer pipe 2.

[0022] One end of the dosing tube 71 is fixedly installed at the output end of the electrolytic anti-marine organism system. After the low-concentration sodium hypochlorite solution is delivered into the dosing tube 71 by the electrolytic anti-marine organism system, it is evenly discharged through the holes on the circumference of the titanium ring 72 to inhibit the growth of marine organisms on the surface of the filter screen 6 and in the pump pipeline.

[0023] The ratchet disc 83 is fixed to the motor bracket with screws, and the motor bracket is fixedly installed inside the cylinder 1. The reverse disc 81 is fixed to the main shaft 53 with a key. The reverse pin 82 is inserted into the small hole of the reverse disc 81, and the reverse pin and the hole are fitted together. When the pump's rotation direction is consistent with the upward direction of the ratchet teeth 84 on the ratchet disc 83, the pump shaft drives the main shaft 53 to rotate, which in turn drives the reverse disc 81 and the reverse pin 82 to rotate together. Due to centrifugal force, the reverse pin 82 will not be in long-term contact with the ratchet disc 83. When the pump shaft stops rotating, the reverse pin 82 will fall into the middle of the multiple ratchet teeth 84. When the pump reverses, the reverse pin 82 is stuck in the middle of the multiple ratchet teeth 84, making the pump unable to rotate and effectively preventing the pump from reversing.

[0024] Please refer to Figures 1, 2 and 3. The hydraulic component 5 includes a guide vane body 51 and an impeller 54. One end of the guide vane body is fixedly installed at one end of the outer pipe, and the impeller is disposed inside the guide vane body.

[0025] The outer tube 2 has a support frame inside, and the surface of the main shaft 53 is rotatably connected to the inside of the support frame to increase the stability of the main shaft 53 when it rotates.

[0026] The main spindle 53 is an ultra-slender shaft system, with the longest shaft reaching 40m. It is divided into multiple sections, and the multiple sections of the main spindle 53 are connected by a half coupling. One end of the main spindle 53 is fixedly installed at the output end of the drive device.

[0027] After the drive unit is started, the main shaft 53 connected to the impeller 54 is rotated to one side, thereby drawing seawater into the interior of the outer pipe 2 and discharging it through the discharge bend on one side of the cylinder 1.

[0028] Referring to Figure 3, a bushing 52 is fixedly installed inside the guide vane body 51, a main shaft 53 is rotatably connected inside the bushing 52, and a pressure reducing sleeve 55 is fixedly installed on the surface of the bushing 52.

[0029] The pressure reducing sleeve 55 is used to reduce the pressure between the bushing 52 and the guide vane body 51. Since the fire pump has a high head, the pressure reducing sleeve 55 plays the role of reducing pressure and reducing leakage.

[0030] The number of hydraulic components 5 is multiple, and the multiple hydraulic components 5 are installed end to end.

[0031] The working principle of the vertical ultra-long shaft fire pump for marine platforms provided by the present invention is as follows: During use, the pump is prevented from swinging by the stabilizer 3 fixedly installed on the surface of the outer pipe 2, while the heating device 4 prevents the seawater inside the outer pipe 2 from freezing due to the cold winter weather.

[0032] When the pump rotates in the same direction as the upward direction of the ratchet teeth on the ratchet disc 83, the pump shaft rotates, causing the main shaft 53 to rotate together with the reverse disc 81 and the reverse pin 82. Due to centrifugal force, the reverse pin 82 will not be in long-term contact with the ratchet disc 83. When the pump shaft stops rotating, the reverse pin 82 will fall into the middle of the multiple ratchet teeth 84 on the ratchet disc 83. When the pump reverses, the reverse pin 82 is stuck in the middle of the multiple ratchet teeth 84, preventing the pump from rotating and effectively preventing the pump from reversing.

[0033] Compared with related technologies, the vertical ultra-long shaft fire pump for offshore platforms provided by this invention has the following beneficial effects: The vertical ultra-long shaft fire pump for offshore platforms provided by this invention has an ultra-slender shaft 53 of the hydraulic component 5, with the longest shaft reaching 40m, extending deep into the seawater. It is used in conjunction with the drive device for pumping water and extinguishing fires, ensuring the safety of life and property. The safety and reliability requirements are extremely high. At the same time, the stabilizer 3 fixedly installed on the surface of the external pipe 2 prevents the pump from swinging. The heating device 4 prevents the seawater inside the external pipe 2 from freezing due to cold winter weather. The filter screen 6, in conjunction with the dosing device 7, prevents the growth of marine organisms. The anti-reverse device 8 of the electric fire pump is installed on the pump, and the anti-reverse device 8 of the diesel engine fire pump is installed on the right-angle gearbox. When the pump shaft stops rotating, the pump cannot rotate in reverse, effectively preventing the pump from reversing and extending the service life of the pump. In addition, the hydraulic component 5 has the ability to prevent overload within the entire flow range.

[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A vertical ultra-long shaft fire pump for offshore platforms, characterized in that, include: Cylinder, external pipe, stabilizer, heating device, drive device, anti-reverse device, hydraulic components, filter screen, dosing device and anti-reverse device; One end of the external connecting pipe is fixedly installed at the bottom of the cylinder, the centralizer is fixedly installed on the surface of the external connecting pipe, and the heating device is fixedly installed on the surface of the external connecting pipe; the driving device is located at the top of the cylinder, the hydraulic component is fixedly installed at one end of the external connecting pipe and at the output end of the driving device, the driving device is used to drive the hydraulic component to work, and the filter screen is fixedly installed at the input end of the hydraulic component; the dosing device includes a dosing pipe and a titanium ring, the dosing pipe is located on the surface of the external connecting pipe, the titanium ring is connected to the output end of the dosing pipe and fixedly installed on the surface of the filter screen; the anti-reverse device includes a reverse disc, multiple reverse pins, a ratchet disc and multiple ratchet teeth, the reverse disc is located inside the cylinder, the multiple reverse pins are slidably connected to the inside of the reverse disc, the ratchet disc is located on the surface of the reverse disc, and the bottoms of the multiple ratchet teeth are fixedly connected to the top of the ratchet disc.

2. The vertical ultra-long shaft fire pump for offshore platforms according to claim 1, characterized in that, The hydraulic component includes a guide vane and an impeller. One end of the guide vane is fixedly installed at one end of the external connecting pipe, and the impeller is disposed inside the guide vane.

3. The vertical ultra-long shaft fire pump for offshore platforms according to claim 2, characterized in that, A bushing is fixedly installed inside the guide vane body, a main shaft is rotatably connected inside the bushing, and a pressure-reducing sleeve is fixedly installed on the surface of the bushing.

4. The vertical ultra-long shaft fire pump for offshore platforms according to claim 1, characterized in that, The hydraulic components are multiple, and the multiple hydraulic components are installed end to end.

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