Natural gas leakage monitoring device for offshore oil production platform

Abstract

The invention discloses an offshore oil production platform natural gas leakage monitoring device which comprises a monitoring box and further comprises a sliding ring, the two sides of the exterior of the monitoring box are each provided with a connecting pipe, the connecting pipes are connected with a pipeline for conveying natural gas, and the sliding ring is connected with the monitoring box. A monitor and an alarm are installed outside the monitoring box, a sealing plate is arranged in the monitoring box, a connecting frame is arranged at the bottom of the sealing plate, rotating plates are arranged on a fixing ring, supporting rods are arranged at the bottom ends of the two rotating plates, and the outer portion of a sliding ring makes contact with the two supporting rods. The monitoring box detects the pressure in the pipeline in a mode of being matched with the monitoring instrument, the leakage condition of natural gas is judged according to the change of the pressure, the sleeve blocks the leakage position of the pipeline in a mode of extruding the sealing piece outwards, continuous leakage of the natural gas is blocked, and potential safety hazards caused by leakage of the natural gas are avoided.

Description

Technical Field

[0001] The invention relates to the field of natural gas monitoring equipment, in particular to a natural gas leakage monitoring device for an offshore oil production platform. Background Art

[0002] An offshore oil platform is an offshore work platform built with steel or concrete, or a mixture of both, and is used for offshore oil production operations. It varies with shallow or deep seas and the methods of offshore oil and gas gathering and production. Natural gas is a flammable mixture, the main component of which is methane gas. Leakage of natural gas may cause an explosion. Therefore, when transporting natural gas on an offshore oil platform, corresponding monitoring devices need to be used.

[0003] Existing monitoring devices usually use detectors to determine the leakage of natural gas transmission pipelines. They have relatively simple functions and can only monitor the leakage of natural gas. They cannot seal the leakage location of the pipeline and cannot block the leakage of natural gas in time. There are certain safety hazards. It is troublesome to check the leakage location of the pipeline, which is not conducive to the normal use of offshore oil platforms. Summary of the invention

[0004] The purpose of the present invention is to provide a natural gas leakage monitoring device for an offshore oil production platform to solve the problem that the existing natural gas leakage monitoring is inconvenient to use.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A natural gas leakage monitoring device for an offshore oil production platform comprises a monitoring box and also comprises:

[0007] Sliding ring, connecting pipes are arranged on both sides of the outside of the monitoring box, the connecting pipes are connected to the pipeline for conveying natural gas, a monitor and an alarm are installed on the outside of the monitoring box, a sealing plate is arranged inside the monitoring box, a connecting frame is arranged at the bottom of the sealing plate, a fixing ring is arranged between the two connecting frames, a rotating plate is arranged on the fixing ring, support rods are arranged at the bottom ends of the two rotating plates, the outside of the sliding ring is in contact with the two support rods, a fixing frame and a rotating frame are arranged inside the sliding ring, a movable plate is slidably arranged inside the fixed frame, one end of the movable plate passes through the sliding ring and is provided with a roller, and the roller is slidably matched with the inner wall of the pipeline;

[0008] Sealing sheet, telescopic rods are slidably provided at both ends of the rotating frame, a sleeve is provided at one end of the telescopic rod, a sealing frame is provided outside the sleeve, the outer wall of the sealing frame is in contact with the inner wall of the pipeline, a sealing sheet is provided inside the sealing frame, the sealing sheet is fixedly provided on the sleeve, and a pressure rod is provided on the outer wall of the sleeve;

[0009] The transmission mechanism is arranged on the fixed frame and connected to the rotating frame. The monitoring box detects the pressure inside the pipeline by cooperating with the monitoring instrument. The sliding ring slides along the inner wall of the pipeline. The transmission mechanism drives the rotating frame and the sealing frame to rotate. The telescopic rod squeezes the sleeve outward to move. The sleeve seals the leakage position of the pipeline by squeezing the sealing sheet outward.

[0010] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0011] In an optional scheme: the transmission mechanism includes rotating blades, a rotating rod, a gear and a transmission rod, a fixed sleeve is arranged at the center position of the fixed frame, a rotating rod is rotatably arranged on the fixed sleeve, one end of the rotating rod is connected to the rotating frame, and a rotating blade is arranged on the other end of the rotating rod, a transmission frame is arranged on the rotating frame, a gear is arranged at one end of the transmission frame, a fixed tooth meshing with the gear is arranged inside the sliding ring, a transmission rod is arranged on the transmission frame, and a transmission groove matching with the transmission rod is opened on the telescopic rod.

[0012] In an optional solution: a rotating block is provided at one end of the rotating rod, a top plate is provided on the top of the monitoring box, a fixed plate is provided on the top plate, a mounting rod is provided between the two fixed plates, and a winding drum is provided on the mounting rod.

[0013] In an optional solution: a wire passing tube is arranged on the sealing plate, a traction rope is arranged on the winding drum, and one end of the traction rope passes through the wire passing tube and is connected to the rotating block.

[0014] In an optional solution: a connecting block is arranged outside the rotating rod, an elastic rod is arranged on the connecting block, one end of the elastic rod is connected to the movable plate, and a baffle is fixedly arranged outside the connecting block.

[0015] In an optional solution: the two rotating plates are symmetrically arranged on the fixed ring, and the ends of the two rotating plates close to each other are respectively provided with a fixing rod and a sleeve, and one end of the fixing rod penetrates into the interior of the sleeve.

[0016] In an optional solution: a screw is arranged on the top plate, a threaded sleeve is arranged at the bottom end of the screw, and the bottom end of the threaded sleeve is connected to the sealing plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The natural gas leakage monitoring device of the offshore oil platform can detect and block natural gas leaks. The monitoring box detects the pressure inside the pipeline by cooperating with the monitor, and judges the leakage of natural gas according to the change of pressure. The sliding ring slides along the inner wall of the pipeline, and the transmission mechanism drives the rotating frame and the sealing frame to rotate. The telescopic rod squeezes the sleeve outward to move. The sleeve blocks the leakage position of the pipeline by squeezing the sealing sheet outward, thereby blocking the continued leakage of natural gas and avoiding the safety hazards caused by natural gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the natural gas leakage monitoring device on the offshore oil platform.

[0020] Figure 2 This is a cross-sectional view of a monitoring box in a natural gas leakage monitoring device on an offshore oil platform.

[0021] Figure 3 This is a schematic diagram of the structure of the fixed ring in the natural gas leakage monitoring device of the offshore oil platform.

[0022] Figure 4 This is a schematic diagram of the structure of the sliding ring in the natural gas leakage monitoring device of the offshore oil platform.

[0023] Figure 5 This is a schematic diagram of the structure of the elastic rod in the natural gas leakage monitoring device of the offshore oil platform.

[0024] Figure 6 This is a schematic diagram of the structure of the rotating frame in the natural gas leakage monitoring device of the offshore oil platform.

[0025] Figure 7 This is a schematic diagram of the structure of the transmission frame in the natural gas leakage monitoring device of the offshore oil platform.

[0026] Figure 8 This is a cross-sectional view of a sealing frame in a natural gas leakage monitoring device on an offshore oil platform.

[0027] Fig. 9 This is a schematic diagram of the structure inside the sealing frame of a natural gas leakage monitoring device on an offshore oil platform.

[0028] Fig.10 This is a schematic diagram of the structure of the sealing plate in the natural gas leakage monitoring device of the offshore oil platform.

[0029] Figure numerals: 1-pipeline, 2-monitoring box, 201-connecting pipe, 3-flange, 4-bolt, 5-top plate, 6-monitor, 7-alarm, 8-screw, 9-reel, 10-fixing plate, 11-connecting frame, 12-sealing plate, 13-wire pipe, 14-threaded sleeve, 15-fixing ring, 16-baffle, 17-rotating plate, 18-support rod, 19-casing, 20-fixing rod, 21-traction rope, 22-turntable, 23-mounting rod, 24 -sliding ring, 241-fixed teeth, 25-sealing frame, 26-sealing sheet, 27-rotating blade, 28-fixed frame, 281-fixed sleeve, 29-movable plate, 30-mounting frame, 31-roller, 32-elastic rod, 33-gear, 34-connecting block, 35-rotating rod, 351-rotating block, 36-rotating frame, 361-transmission frame, 362-transmission rod, 37-telescopic rod, 371-transmission groove, 38-sleeve, 39-pressure rod, 40-spring. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0032] like Figure 1-10 As shown, a natural gas leakage monitoring device for an offshore oil production platform provided by an embodiment of the present invention includes a monitoring box 2 and also includes:

[0033] Sliding ring 24, connecting pipes 201 are provided on both sides of the outside of the monitoring box 2, flanges 3 are provided between the connecting pipes 201 and the pipeline 1, and the flanges 3 are connected by bolts 4, which is convenient for installing the monitoring box 2 on the pipeline 1 for transporting natural gas. A monitor 6 and an alarm 7 are installed on the outside of the monitoring box 2. The monitor 6 can detect the pressure inside the pipeline 1. When the pipeline 1 ruptures and causes natural gas leakage, the pressure inside the pipeline 1 decreases, and the monitor 6 sends an alarm through the alarm 7. A sealing plate 12 is slidably provided inside the monitoring box 2, and a connecting frame 11 is provided at the bottom of the sealing plate 12. The connecting frame 11 is slidably provided inside the monitoring box 2, and a fixing ring 15 is provided between the two connecting frames 11. The fixing ring 15 is provided between the two connecting frames 11. A rotating plate 17 is rotatably provided on the fixed ring 15, and support rods 18 are provided at the bottom ends of the two rotating plates 17. The outside of the sliding ring 24 contacts the two support rods 18, and a fixed frame 28 is fixedly provided inside the sliding ring 24. A rotating frame 36 is slidably provided inside the sliding ring 24, and a movable plate 29 is slidably provided inside the fixed frame 28. One end of the movable plate 29 passes through the sliding ring 24 and is provided with a mounting frame 30, and a roller 31 is provided on the mounting frame 30. The roller 31 is slidably matched with the inner wall of the pipeline 1, and multiple rollers 31 are evenly distributed inside the pipeline 1. A wear-increasing layer is provided on the roller 31, so that the roller 31 can only slide in a direction parallel to the pipeline 1, so as to prevent the sliding ring 24 from rotating inside the pipeline 1;

[0034] The sealing piece 26, both ends of the rotating frame 36 are slidably provided with a telescopic rod 37, one end of the telescopic rod 37 is slidably provided with a sleeve 38, a spring 40 is provided between the sleeve 38 and the telescopic rod 37, the outer side wall of the sealing frame 25 is in contact with the inner wall of the pipe 1, the sealing piece 26 is provided inside the sealing frame 25, the sealing piece 26 is fixedly provided on the sleeve 38, the outer side wall of the sleeve 38 is provided with a pressure rod 39, and the pressure rod 39 is rotatably provided inside the sealing frame 25 through a rotating shaft; the sealing piece 26 is an elastic piece, which squeezes the sealing frame 25 to both sides and fixes the sealing frame 25 through elastic force, and a closed area is formed between the sealing piece 26, the sealing frame 25 and the inner wall of the pipe 1, and the telescopic rod 37 squeezes the sleeve 38 outwards. When the inner wall of the pipe 1 is not When there is damage, the natural gas in the sealing area cannot be discharged outward, so that the telescopic rod 37 cannot drive the sleeve 38 to move upward, and the spring 40 is compressed. When the inner wall of the pipeline 1 is broken, the natural gas in the sealing area leaks from the damaged position, so that the telescopic rod 37 can drive the sleeve 38 and the sealing piece 26 to move outward, and the sealing piece 26 fits the inner wall of the pipeline 1 and blocks the damaged position. The sleeve 38 drives the pressure rod 39 to flip to both sides at the same time, and one end of the pressure rod 39 squeezes the sealing piece 26 to ensure that the sealing piece 26 is completely in contact with the inner wall of the pipeline 1; because the sealing piece 26 is in contact with the pipeline 1, the sealing piece 26 prevents the sealing frame 25 from moving further through friction, and the sliding ring 24 stops moving. According to the position of the sliding ring 24, the damaged position of the pipeline 1 can be determined, which is convenient for subsequent maintenance of the pipeline 1;

[0035] The transmission mechanism is arranged on the fixed frame 28 and connected to the rotating frame 36. The monitoring box 2 detects the pressure inside the pipeline 1 by cooperating with the monitor 6. The sliding ring 24 slides along the inner wall of the pipeline 1. The transmission mechanism drives the rotating frame 36 and the sealing frame 25 to rotate. The telescopic rod 37 squeezes the sleeve 38 outward to move. The sleeve 38 seals the leakage position of the pipeline 1 by squeezing the sealing sheet 26 outward.

[0036] like Figure 1-7As shown in the figure, as a preferred embodiment of the present invention, the transmission mechanism includes a rotating blade 27, a rotating rod 35, a gear 33 and a transmission rod 362. A fixed sleeve 281 is fixedly provided at the center of the fixed frame 28. The rotating rod 35 is rotatably provided on the fixed sleeve 281. One end of the rotating rod 35 is fixedly connected to the rotating frame 36. The other end of the rotating rod 35 is provided with a rotating blade 27. The rotating frame 36 is provided with a transmission frame 361. One end of the transmission frame 361 is fixedly provided with a gear 33. The sliding ring 24 is provided with a gear 33 connected to the gear 33. The fixed teeth 241 are meshed with each other, a transmission rod 362 is provided on the transmission frame 361, and a transmission groove 371 matched with the transmission rod 362 is opened on the telescopic rod 37. The natural gas flows and drives the rotating blades 27 to rotate. The rotating blades 27 drive the rotating frame 36 to rotate through the rotating rod 35. The rotating frame 36 drives the gear 33 to rotate along the inner wall of the sliding ring 34. The gear 33 drives the transmission frame 361 to rotate by meshing with the fixed teeth 241. The transmission frame 361 drives the telescopic rod 27 to slide by cooperating with the transmission groove 371, and the telescopic rod 27 moves back and forth up and down.

[0037] like Figure 1-8 As shown, as a preferred embodiment of the present invention, a rotating block 351 is rotatably provided at one end of the rotating rod 35, a top plate 5 is provided on the top of the monitoring box 2, a fixed plate 10 is provided on the top plate 5, a mounting rod 23 is provided between the two fixed plates 10, a winding drum 9 is provided on the mounting rod 23, a turntable 22 is provided at one end of the mounting rod 23, and the mounting rod 23 and the winding drum 9 are driven to rotate by the turntable 22.

[0038] like Figure 1-4 As shown, as a preferred embodiment of the present invention, a wire passing tube 13 is vertically arranged on the sealing plate 12, and a traction rope 21 is wound around the winding drum 9. One end of the traction rope 21 passes through the wire passing tube 13 and is connected to the rotating block 351. The winding drum 9 pulls the rotating block 351 through the traction rope 21 to facilitate the recovery of the sliding ring 24.

[0039] like Figure 1-8 As shown, as a preferred embodiment of the present invention, the rotating rod 35 is rotatably provided with a connecting block 34 on the outside, and an elastic rod 32 is fixedly provided on the connecting block 34. One end of the elastic rod 32 is connected to the movable plate 29, and a baffle 16 is fixedly provided on the outside of the connecting block 34. The natural gas flows along the pipeline 1 and squeezes the baffle 16. The baffle 16 squeezes the multiple movable plates 29 away from each other through the elastic rod 32, so that the roller 31 at one end of the movable plate 29 is tightly attached to the inner wall of the pipeline 1, preventing the sliding ring 24 from rotating when in use, so that the sliding ring 24 can only move in a direction parallel to the pipeline 1.

[0040] like Fig.10As shown, as a preferred embodiment of the present invention, the two rotating plates 17 are symmetrically arranged on the fixed ring 15, and the ends of the two rotating plates 17 that are close to each other are respectively provided with a fixing rod 20 and a sleeve 19, one end of the fixing rod 20 is inserted into the sleeve 19, and the distance between the fixing rod 20 and the sleeve 19 is adjustable. After the adjustment is completed, it is fixed by a locking bolt, which is convenient for adjusting the use spacing of the support rods 18, so that the fixed ring 15 can support sliding rings 24 of different diameters.

[0041] like Figure 1-3 As shown, as a preferred embodiment of the present invention, a screw rod 8 is provided on the top plate 5, a threaded sleeve 14 is provided at the bottom end of the screw rod 8, the bottom end of the threaded sleeve 14 is connected to the sealing plate 12, and the use position of the sealing plate 12 can be adjusted by rotating the screw rod 8.

[0042] The above embodiment of the present invention provides a natural gas leakage monitoring device for an offshore oil production platform. The monitoring box 2 is installed on the pipeline 1 for conveying natural gas through the flange 3. The monitoring instrument 6 detects the pressure inside the pipeline 1. When the pipeline 1 ruptures and causes natural gas leakage, the pressure inside the pipeline 1 decreases, the alarm 7 sounds an alarm, and the sealing plate 12 is driven down by the screw 8. The sliding ring 24 descends to a position that coincides with the inner wall of the pipeline 1. The sliding ring 24 slides along the inside of the pipeline 1, that is, the sliding ring 24 moves from Figure 2 Move to the position Figure 3 position; during the movement of the sliding ring 24, the natural gas drives the rotating blades 27 to rotate, and the rotating blades 27 drive the rotating frame 36 to rotate through the rotating rod 35, and the rotating frame 36 drives the gear 33 to rotate along the inner wall of the sliding ring 34, and the gear 33 drives the transmission frame 361 to rotate, and the transmission frame 361 drives the telescopic rod 27 to slide by cooperating with the transmission groove 371, and the telescopic rod 27 moves back and forth up and down. When the sealing frame 25 moves to the damaged area of ​​the pipeline 1, the natural gas in the sealing frame 25 leaks from the damaged position, so that the telescopic rod 37 can drive the sleeve 38 and the sealing sheet 26 to move outward, and the sealing sheet 26 is attached to the inner wall of the pipeline 1 and blocks the damaged position, and the sliding ring 24 stops moving. The damaged position of the pipeline 1 can be determined according to the length of the traction rope 21, which is convenient for subsequent maintenance of the pipeline 1.

[0043] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A natural gas leakage monitoring device for an offshore oil production platform, comprising a monitoring box, characterized in that: Also includes: Sliding ring, connecting pipes are arranged on both sides of the outside of the monitoring box, the connecting pipes are connected to the pipeline for conveying natural gas, a monitor and an alarm are installed on the outside of the monitoring box, a sealing plate is arranged inside the monitoring box, a connecting frame is arranged at the bottom of the sealing plate, a fixing ring is arranged between the two connecting frames, a rotating plate is arranged on the fixing ring, support rods are arranged at the bottom ends of the two rotating plates, the outside of the sliding ring is in contact with the two support rods, a fixing frame and a rotating frame are arranged inside the sliding ring, a movable plate is slidably arranged inside the fixed frame, one end of the movable plate passes through the sliding ring and is provided with a roller, and the roller is slidably matched with the inner wall of the pipeline; Sealing sheet, telescopic rods are slidably provided at both ends of the rotating frame, a sleeve is provided at one end of the telescopic rod, a sealing frame is provided outside the sleeve, the outer wall of the sealing frame is in contact with the inner wall of the pipeline, a sealing sheet is provided inside the sealing frame, the sealing sheet is fixedly provided on the sleeve, and a pressure rod is provided on the outer wall of the sleeve; The transmission mechanism is arranged on the fixed frame and connected to the rotating frame. The monitoring box detects the pressure inside the pipeline by cooperating with the monitoring instrument. The sliding ring slides along the inner wall of the pipeline. The transmission mechanism drives the rotating frame and the sealing frame to rotate. The telescopic rod squeezes the sleeve outward to move. The sleeve seals the leakage position of the pipeline by squeezing the sealing sheet outward.

2. The natural gas leakage monitoring device for offshore oil production platform according to claim 1, characterized in that: The transmission mechanism includes rotating blades, a rotating rod, a gear and a transmission rod. A fixed sleeve is provided at the center position of the fixed frame. A rotating rod is rotatably provided on the fixed sleeve. One end of the rotating rod is connected to the rotating frame. Rotating blades are provided outside the rotating rod. A transmission frame is provided on the rotating frame. A gear is provided at one end of the transmission frame. Fixed teeth are provided inside the sliding ring. The gear is meshed with the fixed teeth. A transmission rod is provided on the transmission frame. A transmission groove matching the transmission rod is provided on the telescopic rod.

3. The natural gas leakage monitoring device for offshore oil production platform according to claim 2 is characterized in that: A rotating block is arranged at one end of the rotating rod, a top plate is arranged on the top of the monitoring box, a fixing plate is arranged on the top plate, a mounting rod is arranged between the two fixing plates, and a winding drum is arranged on the mounting rod.

4. The natural gas leakage monitoring device for an offshore oil production platform according to claim 3 is characterized in that: The sealing plate is provided with a wire passing tube, the winding drum is provided with a traction rope, and one end of the traction rope passes through the wire passing tube and is connected to the rotating block.

5. The natural gas leakage monitoring device for offshore oil production platform according to claim 4, characterized in that: A connecting block is arranged outside the rotating rod, an elastic rod is arranged on the connecting block, one end of the elastic rod is connected to the movable plate, and a baffle is fixedly arranged outside the connecting block.

6. The natural gas leakage monitoring device for an offshore oil production platform according to claim 1, characterized in that: The two rotating plates are symmetrically arranged on the fixing ring, and the ends of the two rotating plates close to each other are respectively provided with a fixing rod and a sleeve, and one end of the fixing rod penetrates into the interior of the sleeve.

7. The natural gas leakage monitoring device for offshore oil production platform according to claim 1, characterized in that: A screw is arranged on the top plate, a threaded sleeve is arranged at the bottom end of the screw, and the bottom end of the threaded sleeve is connected to the sealing plate.

Images