Water passing ball device for reducing exhaust of long-distance pipeline and exhaust method of water passing ball device

Abstract

The water passing ball device comprises a starting pipeline with a ball receiving chamber, a water ejecting ball is arranged in the ball receiving chamber, the starting pipeline is connected with an installation pipeline, the installation pipeline forms a ball serving chamber, the installation pipeline is detachably connected with the long conveying pipeline, and the long conveying pipeline is connected with the water ejecting ball. The starting pipeline is connected with an external pipeline used for conveying media to the starting pipeline, the media in the external pipeline can abut against the water jacking ball so that the water jacking ball can overcome the elastic force of the installation pipeline and the elastic force of the long-distance conveying pipeline to move along the long-distance conveying pipeline, air in the long-distance conveying pipeline can be exhausted, the water jacking ball can be filled in the serving ball, the water inlet is connected, and the exhaust valve is opened. According to the invention, a discharge port is not arranged at a high point along the way of the long-distance pipeline, the cost is reduced, and the hidden danger of leakage in the future pipeline operation process is reduced. The water inlet control valve is opened, the ball is pressed to the ball receiving chamber at the tail end of the pipeline by using the pressure of water, and a hydrostatic test is carried out on the pipeline through the pressurizing pump.

Description

Technical Field

[0001] The present invention relates to a device and an exhaust method thereof, and more specifically, to a water pigging device for reducing the exhaust of long-distance pipelines and an exhaust method thereof, belonging to the field of petrochemical industry. Background Art

[0002] In general, long-distance pipelines of petrochemical plants use the method of pigging to clean the pipelines. However, before cleaning the pipelines, a hydrostatic test process needs to be carried out on the pipelines. There should be no gas in the pipelines during the hydrostatic test. In order to effectively remove the gas in the pipelines, high-point exhaust ports are generally set at the highest points of the pipelines. Long-distance pipelines are generally relatively long, and dozens or even hundreds of exhausts are set along the way; after the hydrostatic test of the pipelines is completed, they need to be blocked along the way, and there are also potential hazards of long-distance leakage during future operation. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a water pigging device for reducing the exhaust of long-distance pipelines and an exhaust method thereof. This design mainly adopts the water pigging exhaust method, in which the ball pushes the gas in the pipeline to the end and discharges it completely in the pipeline; in this way, the gas in the pipeline can be discharged without setting high-point exhausts along the way, which can ensure the subsequent safe hydrostatic test and eliminate the potential leakage hazards during the future operation of the pipeline.

[0004] In order to achieve the above object, the present invention is realized by the following technical solutions:

[0005] A water pigging device for reducing the exhaust of long-distance pipelines according to the present invention includes a starting pipeline with a pig receiver chamber, a top water ball is arranged in the pig receiver chamber, the starting pipeline is connected with an installation pipeline and the installation pipeline forms a pig launcher chamber, and the installation pipeline is detachably connected with a long-distance pipeline; both the installation pipeline and the long-distance pipeline are elastic pipelines, and the diameters of the installation pipeline and the long-distance pipeline are smaller than the diameter of the top water ball. An external pipeline for conveying a medium to the starting pipeline is connected to the starting pipeline, and the medium in the external pipeline can hold the top water ball to overcome the elastic force of the installation pipeline and the long-distance pipeline and move along the long-distance pipeline, so as to discharge the air in the long-distance pipeline.

[0006] Preferably, the external pipeline includes a water inlet pipeline with a water inlet control valve, the water inlet pipeline is connected to the starting pipeline on the right side of the pig receiver chamber, the water inlet pipeline is connected with an exhaust pipeline with an exhaust valve, and the exhaust pipeline is connected to the upper end of the installation pipeline.

[0007] Preferably, a pressure pump is connected to the water inlet pipeline.

[0008] Preferably, the inlet control valve and the exhaust valve are both electrically controlled valves; a remote pressure gauge is connected to the starting pipeline at the receiving chamber; the pressure pump, the remote pressure gauge and each valve are all connected to the controller. The controller can be an industrial DCS controller / system.

[0009] Preferably, the right end of the starting pipeline is connected with an openable filling door for the receiving chamber for loading water pushing balls.

[0010] Preferably, the installation pipeline and the long-distance pipeline are connected by a flexible flange.

[0011] Preferably, the diameter of the receiving chamber in the starting pipeline is adapted to the diameter of the water pushing ball in terms of size.

[0012] An exhaust method for a water pigging device for reducing exhaust of a long-distance pipeline according to the present invention, the method comprising the following steps:

[0013] Step 1: Select a starting pipeline and an installation pipeline with the same pressure grade as the long-distance pipeline, fill the water pushing balls in the ball sending chamber, and connect the inlet pipeline and the exhaust pipeline;

[0014] Step 2: Connect the installation pipeline and the long-distance pipeline;

[0015] Step 3: Remotely control and open the exhaust valve and the inlet control valve respectively through the controller, use the inlet pipeline to convey water into the starting pipeline, first use the pressure of the water to press the water pushing ball to the left end of the receiving chamber, stop the water supply of the inlet pipeline, and conduct a hydrostatic test on the starting pipeline through the pressure pump;

[0016] Step 3: Push the water pushing ball into the installation pipeline to prepare for the exhaust operation of the long-distance pipeline;

[0017] Step 4: Continuously convey pressure through the pressure pump to push the water pushing ball out of the long-distance pipeline under airtight conditions, and finally realize the exhaust of the long-distance pipeline.

[0018] Beneficial effects: Compared with the prior art, it is realized that no discharge ports are arranged at high points along the long-distance pipeline, the cost is reduced, and the leakage hidden danger during the subsequent pipeline operation is reduced. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention. Detailed Embodiment

[0020] The following further illustrates the present invention with reference to the drawings of the specification, but the present invention is not limited to the following embodiments.

[0021] As Figure 1Shown is a specific embodiment of a water pigging device for reducing air exhaust in long-distance pipelines. This embodiment is a water pigging device for reducing air exhaust in long-distance pipelines, including a starting pipeline with a pig receiving chamber. A water pushing ball 4 is arranged in the pig receiving chamber. The starting pipeline is connected to an installation pipeline 2, and the installation pipeline 2 forms a pig launching chamber. The installation pipeline 2 is detachably connected to a long-distance pipeline 1. Both the installation pipeline 2 and the long-distance pipeline 1 are elastic pipelines, and the diameters of the installation pipeline 2 and the long-distance pipeline 1 are smaller than the diameter of the water pushing ball 4. An external pipeline for conveying medium to the starting pipeline is connected to the starting pipeline. The medium in the external pipeline can hold the water pushing ball 4 to overcome the elastic forces of the installation pipeline 2 and the long-distance pipeline 1 and move along the long-distance pipeline 1, so as to discharge the air in the long-distance pipeline 1.

[0022] The external pipeline includes a water inlet pipeline 8 with a water inlet control valve 6. The water inlet pipeline is connected to the starting pipeline on the right side of the pig receiving chamber. The water inlet pipeline is connected to an exhaust pipeline with an exhaust valve 3, and the exhaust pipeline is connected to the upper end of the installation pipeline 2. The water inlet pipeline 8 is connected to a pressure pump. Both the water inlet control valve 6 and the exhaust valve 3 are electrically controlled valves. A remote pressure gauge 5 is connected to the starting pipeline at the pig receiving chamber. The pressure pump, the remote pressure gauge 5, and each valve are all connected to a controller, and the controller can select an industrial DCS controller / system. A pig receiving chamber filling door 7 that can be opened and closed is connected to the right end of the starting pipeline for loading the water pushing ball 4. The installation pipeline 2 and the long-distance pipeline 1 are connected through an elastic flange. The diameter of the pig receiving chamber in the starting pipeline is adapted to the diameter of the water pushing ball 4 in terms of size.

[0023] The device of the present invention is ingeniously designed to optimize the air exhaust process of long-distance pipelines (such as oil and natural gas transmission pipelines), and reduce the efficiency loss and safety hazards caused by improper air exhaust. Next, we will expand and describe the device and its operation method in detail.

[0024] Starting pipeline and pig receiving chamber: The starting pipeline is the core starting point of the entire device, and the pig receiving chamber arranged inside it is specifically used to accommodate the water pushing ball 4. The design of the pig receiving chamber needs to ensure that the water pushing ball 4 can enter and exit smoothly, while reducing the possibility of medium leakage.

[0025] Water pushing ball 4: As a key component of the device, the diameter of the water pushing ball 4 is slightly larger than the diameters of the installation pipeline 2 and the long-distance pipeline 1, but smaller than the diameter of the pig receiving chamber. Such a design enables the water pushing ball 4 to move forward under the push of the medium, overcoming the elastic resistance of the pipeline and effectively discharging the air in the pipeline.

[0026] Installation pipeline 2 and pig launching chamber: The installation pipeline 2 not only forms the pig launching chamber but also bears the responsibility of connecting the starting pipeline and the long-distance pipeline 1. Its detachable design facilitates maintenance and replacement, and also enables the device to be flexibly applied to long-distance pipelines of different lengths.

[0027] Elastic pipeline: The installation pipeline 2 and the long-distance pipeline 1 are both made of elastic materials, which can not only adapt to the pressure changes caused by the passage of the top water ball 4, but also compensate for the expansion and contraction of the pipeline caused by temperature changes to a certain extent, thereby enhancing the stability of the system.

[0028] External pipelines and control system: The external pipelines include a water inlet pipeline 8 and an exhaust pipeline, which are used to inject medium into the system and exhaust air respectively. In particular, the water inlet pipeline 8 is equipped with a water inlet control valve 6 and a pressure pump, which can accurately control the input amount and pressure of the medium, while the exhaust valve 3 on the exhaust pipeline is responsible for releasing the gas in the pipeline. In addition, the entire system is remotely automated through a controller, including an electronically controlled valve, a remote pressure gauge 5, etc., which improves operational efficiency and safety.

[0029] Water inlet pipeline with pressure pump: Adding a pressure pump to the water inlet pipeline 8 can achieve precise adjustment of the water pressure inside the system, ensure that the water ball 4 can be pushed forward smoothly, and at the same time detect the sealing performance of the pipeline.

[0030] Electronically controlled valves and remote pressure gauges: The integration of electronically controlled valves (such as the water inlet control valve 6 and the exhaust valve 3) and the remote pressure gauge 5 allows operators to monitor and adjust the system status in a safe location away from the site, greatly improving the safety and convenience of operation.

[0031] Ball receiving chamber filling door 7: An openable and closable ball receiving chamber filling door 7 is provided at the right end of the starting pipe to facilitate manual filling of the top water ball 4 and ensure that each operation can proceed smoothly.

[0032] Elastic flange connection: An elastic flange connection is used between the installation pipeline 2 and the long-distance pipeline 1, which not only ensures the firmness of the connection, but also absorbs the stress of the pipeline caused by the flow of the medium or the change of the external environment to a certain extent.

[0033] A specific embodiment of the present invention provides a method for exhausting a water ball device for reducing exhaust gas in a long-distance pipeline. The method for exhausting a water ball device for reducing exhaust gas in a long-distance pipeline includes:

[0034] Preparation stage: First, select the appropriate starting pipeline and installation pipeline 2 according to the pressure level of the long-distance pipeline 1 to ensure the compatibility of the system. Then, fill the serving room with an appropriate amount of top water ball 4 and connect the water inlet pipeline 8 and the exhaust pipeline.

[0035] Testing phase: Before the formal exhaust, the exhaust valve 3 and the water inlet control valve 6 are remotely opened through the controller, and water is transported to the starting pipeline through the water inlet pipe to conduct a preliminary water pressure test to check the sealing of the system and the propulsion effect of the water ball 4.

[0036] Exhaust operation: After confirming that the system is in good condition, close the exhaust valve 3, and continue to apply pressure through the pressure pump to push the water ball 4 along the long-distance pipeline 1 until it is pushed out from the other end of the pipeline, thereby effectively exhausting the air in the pipeline.

[0037] Finishing work: After the exhaust is completed, close the water inlet control valve 6 and the pressure pump, open the exhaust valve 3 to release the remaining pressure in the pipeline, and then disassemble the installation pipeline 2 to prepare for the next operation.

[0038] Through such a series of carefully designed steps and components, the water ball device not only effectively reduces the exhaust cost of long-distance pipelines, but also significantly reduces the leakage risks caused by improper exhaust during operation, providing a strong guarantee for the safety and efficiency of energy transportation.

[0039] Finally, it should be noted that the present invention is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by ordinary technicians in this field should be considered as the protection scope of the present invention.

Claims

1. A water pigging device for reducing exhaust in long-distance pipelines, characterized in that: It includes a starting pipeline with a pig receiving chamber, in which a top water ball (4) is provided. The starting pipeline is connected to an installation pipeline (2) which forms a ball sending chamber, and the installation pipeline (2) is detachably connected to a long-distance pipeline (1); both the installation pipeline (2) and the long-distance pipeline (1) are elastic pipelines, and the diameters of the installation pipeline (2) and the long-distance pipeline (1) are smaller than the diameter of the top water ball (4). An external pipeline for conveying medium to the starting pipeline is connected to the starting pipeline, and the medium in the external pipeline can hold up the top water ball (4) to overcome the elastic force of the installation pipeline (2) and the long-distance pipeline (1) and move along the long-distance pipeline (1), so as to discharge the air in the long-distance pipeline (1).

2. The water pigging device for reducing exhaust of long-distance pipelines according to claim 1, characterized in that: The external pipeline includes a water inlet pipeline (8) with a water inlet control valve (6). The water inlet pipeline is connected to the starting pipeline on the right side of the pig receiving chamber, and the water inlet pipeline is connected to an exhaust pipeline with an exhaust valve (3), and the exhaust pipeline is connected to the upper end of the installation pipeline (2).

3. The water pigging device for reducing the exhaust of long-distance pipelines according to claim 2, characterized in that: The water inlet pipeline (8) is connected with a pressure pump.

4. The water pigging device for reducing exhaust gas of long-distance pipelines according to claim 3, wherein: Both the water inlet control valve (6) and the exhaust valve (3) are electrically controlled valves; a remote pressure gauge (5) is connected to the starting pipeline at the pig receiving chamber; the pressure pump, the remote pressure gauge (5) and each valve are all connected to a controller. (The controller can select an industrial DCS controller / system).

5. A water pigging device for reducing the exhaust of long-distance pipelines according to claim 1, characterized in that: A closable pig receiving chamber filling door (7) is connected to the right end of the starting pipeline for loading the top water ball (4).

6. A water pigging device for reducing the exhaust of long-distance pipelines according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The installation pipeline (2) and the long-distance pipeline (1) are connected by an elastic flange.

7. A water pigging device for reducing exhaust gas in a long-distance pipeline according to claim 6, characterized in that: The diameter of the pig receiving chamber in the starting pipeline is adapted to the diameter of the top water ball (4) in terms of size.

8. An exhaust method for a water pigging device that reduces exhaust of a long-distance pipeline as described in any one of claims 1-7, characterized in that The method includes the following steps: Step 1: Select a starting pipeline and an installation pipeline (2) with the same pressure grade as the long-distance pipeline (1), fill the ball sending chamber with the top water ball (4), and connect the water inlet pipeline and the exhaust pipeline. Step 2: Connect the installation pipeline (2) and the long-distance pipeline (1) completely. Step 3: Remotely control the controller to open the exhaust valve (3) and the water inlet control valve (6) respectively, use the water inlet pipeline to convey water into the starting pipeline, first use the pressure of the water to press the top water ball (4) to the left end of the pig receiving chamber, stop the water supply of the water inlet pipeline, and conduct a hydrostatic test on the starting pipeline through the pressure pump. Step 3: Push the top water ball (4) into the installation pipeline (2) to prepare for the air exhaust operation of the long-distance pipeline (1). Step 4: Continuously convey pressure through the pressure pump to push the top water ball (4) out of the long-distance pipeline (1) under airtight conditions, and finally realize the air exhaust of the long-distance pipeline (1).

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