A device for discharging accumulated water in a pipeline

Abstract

The present application discloses a device for discharging water accumulated in a pipeline, which mainly includes a drainage structure, a sealing structure and a pressure regulating structure. The pressure regulating structure is suitable for adjusting the air pressure difference between the pipeline and the external environment. The drainage device is suitable for being installed from the top of the vent pipe, and a valve is provided in the vent pipe. During installation, the valve is closed to keep the pipeline closed until the sealing structure is installed and the sealing structure and the drainage structure block the top of the vent pipe, and then the valve is opened. The drainage structure is then inserted into the bottom of the pipeline so that the air pressure inside the pipeline presses the accumulated water into the drainage structure for discharge. The set drainage device uses the air pressure in the pipeline to press out the accumulated water. Through the cooperation of the sealing structure and the drainage structure, the gas loss in the pipeline can be prevented before drainage, thereby reducing the pressure and making the drainage of the accumulated water in the pipeline more complete.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline drainage, and in particular to a device for discharging accumulated water from a pipeline. Background Art

[0002] For example, gas pipelines are often closed pipelines and generally require regular inspection and maintenance. During inspection, the gas in the inspection section of the pipeline is generally vented. Therefore, vent pipes are generally pre-buried at specific locations in the pipeline. Common vent pipes include single-vent ball valve pipelines and double-vent ball valve pipelines.

[0003] During long-term use, moisture brought by the water vapor contained in the natural gas and the penetration of the pipeline joints will accumulate at the bottom of the pipeline. The accumulated water occupies the pipeline space, affecting the transmission flow. There are also disadvantages such as freezing and damaging the pipeline or clogging the pipeline in winter. Summary of the Invention

[0004] The purpose of this application is to provide a pipeline water discharge device.

[0005] To achieve the above objectives, the technical solution adopted in this application is: a pipeline water discharge device, wherein the pipeline is used to transport gas, and the pipeline is provided with a discharge pipe upward, characterized in that the discharge device includes:

[0006] a drainage structure adapted to connect the pipeline with the external environment;

[0007] A sealing structure, wherein the sealing structure and the top port of the discharge pipe are detachably sealed, and the drainage structure is adapted to be sealed in the middle of the sealing structure and interspersed therewith for upward and downward adjustment;

[0008] a pressure regulating structure adapted to regulate the pressure difference between the pipeline and the external environment;

[0009] The discharge device is suitable for being installed from the top of the discharge pipe, and a valve is provided in the discharge pipe; during installation, the valve is closed to keep the pipe closed until the sealing structure is installed and the sealing structure and the drainage structure seal the top of the discharge pipe, then the valve is opened, and then the drainage structure is inserted into the bottom of the pipe so that the air pressure inside the pipe presses the accumulated water into the drainage structure for discharge; when the air pressure in the pipe is insufficient, the pressure regulating structure works to make the air pressure in the pipe higher than the air pressure of the external environment, thereby discharging the accumulated water.

[0010] As a preference, the drainage structure includes a drain pipe and a switch valve arranged on the top of the drain pipe. During installation, the switch valve is closed to seal the drain pipe from the external environment, and the switch valve is opened until the drain pipe is inserted into the bottom of the pipe.

[0011] As a preferred embodiment, the sealing structure includes a fixing member and an elastic portion, the fixing member and the elastic portion are coaxial and fixed to each other, and a passage cavity for the drainage pipe to pass through is provided in the middle of both.

[0012] The fixing member is sealed and installed at the top port of the discharge pipe. The drain pipe passes through the through cavity. The elastic part is suitable for adjusting the clamping degree between it and the drain pipe so that the drain pipe can keep a fixed position during the discharge process.

[0013] As a preference, the elastic part includes an elastic outer part, a sealing part and an elastic inner part. The elastic outer part and the elastic inner part are fixedly assembled and the degree of clamping of the drain pipe is increased during the assembly process. The sealing part is arranged in the inner cavity of the elastic inner part and is compressed by the top inner wall of the elastic outer part. The through cavity is formed at the center of the sealing part, and the elastic inner part and the fixing part are fixedly installed.

[0014] As a preference, the pipeline includes a main valve, the inner cavity of the pipeline is blocked by the main valve to form a first area and a second area, and the first area and the second area are respectively provided with a discharge pipe.

[0015] As a preferred embodiment, the discharge device is provided at the top of the two discharge pipes, the pressure regulating structure includes a normally closed external port provided at the sealing structure and a pressurized pipe and a stop valve provided between the two external ports on both sides, the external port and the sealing structure are integrally formed, and a pressurized channel is provided through the middle of the side wall of the sealing structure from top to bottom. After the sealing structure is installed, the pressurized channel and the external port and the inner cavity of the discharge pipe are all connected. After the sealing structure is installed, the external port is suitable for connecting the top inner cavity of the discharge pipe with the external environment when it is opened.

[0016] The drain pipe on the side in the discharge state is inserted into the bottom of the pipe, and the bottom of the drain pipe on the other side is located above the valve, and the valve on this side is in a closed state. When the air pressure in the discharge pipe on the side in the discharge state is insufficient, the stop valve is opened, and the gas on the side not in the discharge state passes through the external port on this side through the pressurized pipe and then through the external port on the other side into the discharge pipe on the side with insufficient air pressure, so as to increase the air pressure on this side and discharge residual moisture.

[0017] As a preference, the shut-off valve opens when the air pressure inside the vent pipe on the discharge state side is higher than the atmospheric pressure setting range, so that the air pressure in the vent pipe on the discharge state side is always in the exhaust state before the drainage operation is completed.

[0018] As a preferred embodiment, the pressure regulating structure includes an air pump detachably mounted on the top of the bleed pipe. During drainage, the main valve is opened to connect the first area and the second area. The bleed pipe on one side is connected to the discharge equipment for drainage, and the bleed pipe on the other side is connected to the air pump, while the valve of the bleed pipe on this side is closed. When the air pressure in the bleed pipe in the discharge state is insufficient, the air pump starts working and opens the valve on this side to increase the air pressure in the pipeline and discharge residual moisture.

[0019] As a preferred embodiment, the pressure regulating structure includes regulating valves arranged on both sides of the pipeline, and the outer sides of the regulating valves on both sides are connected to the air source. When the air pressure in the discharge pipe in the discharge state is insufficient, the drainage structure is raised to the top of the valve and then the valve is closed. Then, the regulating valves and the main valve on both sides are opened to restore the air pressure on both sides to the delivery pressure, and then the drainage structure is inserted to continue the drainage operation.

[0020] As a preference, the pressure regulating structure includes a collecting container and a water pump arranged on the outside of the drainage structure, and the water pump is suitable for extracting the liquid and / or gas inside the collecting container when the pressure inside the pipeline is insufficient, so that the pressure inside the collecting container is lower than the pressure inside the pipeline.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) The drainage equipment is installed to use the air pressure in the pipeline to press out the accumulated water, which is simple to implement. The drainage equipment is compact and easy to carry. On the other hand, the combination of the sealing structure and the drainage structure can prevent the loss of gas in the pipeline and reduce the pressure before drainage. The higher air pressure makes the accumulated water in the pipeline drain more completely.

[0023] (2) The setting of the pressure regulating device allows drainage operations to be carried out when the internal pressure of the pipeline is at normal pressure, high pressure or even negative pressure relative to the external pressure. Moreover, the pressure regulation of the pressure regulating structure can ensure that the accumulated water is discharged more cleanly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the present application when using a drainage device for discharge operations.

[0025] Figure 2 The present application is a cross-sectional view of a usage state when two drainage devices are used together to perform discharge operations.

[0026] Figure 3 yes Figure 2 Schematic diagram of the top of the first vent pipe cooperating with the sealing structure and drainage structure.

[0027] Figure 4 yes Figure 2 Top view of the overall structure.

[0028] Figure 5 This is a schematic diagram of a double-relief ball valve with sealing structures installed at both ends of the pipeline.

[0029] Figure 6 yes Figure 2 A cross-sectional view of a portion of the structure in a usage state after using one of the voltage regulating structures.

[0030] Figure 7 yes Figure 5 Schematic diagram of the medium voltage regulating structure when it is opened.

[0031] Figure 8 This is a schematic diagram of using an air pump for pressure regulation.

[0032] Figure 9 This is a schematic diagram of using a water pump for pressure regulation.

[0033] In the figure: 1. First vent pipe; 2. Pipeline; 3. Main valve; 4. Valve stem; 5. Discharge equipment; 51. Drain pipe; 52. Switch valve; 53. Elastic outer piece; 54. Seal; 55. Fixing piece; 56. External port; 57. Elastic inner piece; 6. First ball valve; 7. Fixing seat; 9. Second ball valve; 10. Second vent pipe; 11. Pressurization channel; 12. Stop valve; 13. Pressurization pipeline. DETAILED DESCRIPTION

[0034] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating the orientation and position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0036] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0037] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0038] Reference Figures 1 to 6 This application proposes a pipeline water discharge device for use in a pipeline 2 with a transport pressure greater than atmospheric pressure. The pipeline 2 is provided with a discharge pipe upward. This discharge device 5 is mainly used in a gas transport pipeline 2, especially a gas pipeline. The preferred pipeline 2 is as follows Figure 1 The diagram includes a first vent pipe 1 on the left and a second vent pipe 10 on the right. The two vent pipes are generally arranged vertically upward. When performing emptying or replacement operations, they are blocked by the main valve 3, thereby dividing the pipeline 2 into two parts and simultaneously venting through the vent pipes, which helps to reduce the pressure effect when the pipeline 2 is vented. The pipeline described in this application can be a gas pipeline or a pipeline for transporting other media such as gas-powder mixtures. For ease of understanding, this application takes the transportation of gas as an example. The main valve 3 is as shown. Figure 1 As shown, a valve stem 4 is provided at its top, which can be extended upward to facilitate operation of the main valve 3. A protective seat can be provided on the outer shell of the valve stem 4, and a sealing gasket can be placed inside the protective seat to ensure the sealing of the valve stem 4 after installation. A fixing seat 7 is provided in the middle of the protective seat, which can be fixedly installed with the first discharge pipe 1 and the second discharge pipe 10 to ensure strength after installation.

[0039] During the gas transportation process, water will accumulate in the pipeline due to the moisture in the gas itself and the moisture that penetrates into some valve connections. The accumulated water has the disadvantages of reducing the pipeline transportation flow and clogging or freezing the pipeline in winter. Therefore, timely drainage is of great significance to the normal gas transmission of the pipeline.

[0040] A bleed pipe is a device specifically designed to release air or gas from within a pipeline. It can be used to expel air from the pipeline once it's in operation. It can also be used to release gas from the pipeline during pipeline or equipment maintenance to prevent the formation of explosive mixtures. It can also provide overpressure protection for downstream equipment and release high-pressure, high-velocity gases. This application primarily uses a dual-bleed ball valve pipeline for transporting gas as an example.

[0041] like Figure 1 、 Figure 2 As shown, the discharge equipment mainly includes: drainage structure and sealing structure.

[0042] The drainage structure is used to connect the pipeline 2 with the external environment and provide a flow path for drainage.

[0043] The sealing structure and the top port of the vent pipe are removably sealed. The drainage structure is sealed in the middle of the sealing structure and inserted through it to allow for upward and downward adjustment. The vent pipe is equipped with a valve. During installation, the valve is closed to keep the pipe 2 sealed. After the sealing structure is installed and the sealing structure and drainage structure seal the top of the vent pipe, the valve is opened. The drainage structure is then inserted into the bottom of the pipe 2, allowing the air pressure inside the pipe 2 to press the accumulated water into the drainage structure for discharge.

[0044] Because the discharge pipe is under normal maintenance, the discharge equipment 5 is not installed. Figure 2 The valves shown (i.e., the first ball valve 6 and the second ball valve 9) are closed, while the sealing structure is installed at the top of the vent pipe. Furthermore, the closed valves require a relatively closed environment within the vent pipe to prevent internal air pressure leakage before drainage. Therefore, in this embodiment, the valves cannot be directly opened and then the discharge device 5 installed. The sealing structure must be installed first, and then the valves must be opened and the drainage structure inserted before drainage can begin. Therefore, the drainage structure in this embodiment must be able to move relative to the sealing structure to adjust the entry of the drainage structure. By inserting the drainage structure into the middle of the sealing structure, it is possible to maintain a relatively sufficient air pressure within the vent pipe before drainage, and to release pressure only after drainage. Of course, if the drainage structure is not controlled by the switch valve 52, when the valve is opened after the sealing structure is installed, the vent pipe has already started to press a certain amount of gas into the drainage structure. Therefore, if there is no closing effect of the switch valve 52, it is necessary to quickly insert the drainage structure to the bottom of the pipe 2 when the valve is opened. If there is too much liquid in the pipe 2, the bottom of the drainage structure will be immersed in water. If there is less liquid in the pipe 2, the drainage structure may not be immersed in the liquid. However, when the gas is discharged through the drainage structure, the gas flow rate in the pipe is high and the pressure is low, which will cause the bottom of the drainage structure to entrain the internal liquid, thereby achieving the effect of liquid discharge.

[0045] The provided drainage device 5 utilizes the air pressure within the pipe 2 to press out the accumulated water, which is simple to implement and has a compact structure that is easy to carry. Furthermore, the cooperation between the sealing structure and the drainage structure can prevent gas loss in the pipe 2 before drainage, thereby reducing the pressure. The higher air pressure allows the accumulated water in the pipe to be discharged more completely.

[0046] In order to make the discharge equipment easy to use, the preferred drainage structure includes a drain pipe 51 and a switch valve 52 arranged at the top of the drain pipe 51. During installation, the switch valve 52 is closed to seal the drain pipe 51 from the external environment until the drain pipe 51 is inserted into the bottom of the pipeline 2 and the switch valve 52 is opened.

[0047] A preferred embodiment of the sealing structure is presented below.

[0048] like Figure 2 、 Figure 3 As shown, the sealing structure includes a fixing member 55 and an elastic part. The fixing member 55 and the elastic part are coaxial and fixed to each other. A through cavity for the drain pipe 51 to pass through is provided in the middle of both. The fixing member 55 is sealed and installed at the top port of the discharge pipe. The drain pipe 51 passes through the through cavity. The elastic part is suitable for adjusting the degree of clamping between it and the drain pipe 51 so that the drain pipe 51 remains in a fixed position during the discharge process. Figure 3 As shown, the elastic part includes an elastic outer part 53, a sealing part 54 and an elastic inner part 57. The elastic outer part 53 and the elastic inner part 57 are fixedly assembled and the clamping degree of the drain pipe 51 is increased during the assembly process. The sealing part 54 is arranged in the inner cavity of the elastic inner part 57 and is compressed by the top inner wall of the elastic outer part 53. The cavity is formed at the center of the sealing part 54, and the elastic inner part 57 and the fixing part 55 are fixedly installed.

[0049] like Figure 3 As shown, the outer elastic member 53 is typically threadedly connected to the inner elastic member 57. As the threads engage, the inner elastic member 57 is gradually compressed (this is a common technique), allowing the internal seal 54 to press against the drain pipe 51, ensuring a seal. Of course, even without compression, the seal 54 and drain pipe 51 still provide a certain degree of sealing performance when engaged. The seal 54 is made of an elastic material with good sealing performance, such as rubber. The inner elastic member 57 and the fixing member 55 can be secured by bonding, welding, interference fit, or threaded assembly. The fixing member 55 and the vent pipe are removably secured by means such as an interference fit or threaded assembly.

[0050] When draining a common gas pipeline 2, the initial pressure within the pipeline is generally greater than atmospheric pressure. To prevent excessive leakage of gas that continues to enter and cause waste and danger, both sides of the pipeline 2 are generally blocked during drainage, forming a relatively closed environment. The pipeline 2 is drained by residual pressure. Therefore, as the residual pressure in the pipe continues to be released, the pressure in the pipeline 2 gradually decreases, inevitably resulting in insufficient pressure in the pipeline 2, which may prevent the water inside the pipeline 2 from being completely drained. To address this problem, this embodiment prioritizes the pressurization implementation scheme, and several specific implementation schemes are provided below.

[0051] The first pressurization implementation scheme is that the pressure regulating structure pressurizes the pipeline 2 which is in the discharge state and has insufficient pressure. A common working condition is that the internal pressure of the pipeline 2 for transporting gas gradually decreases after a certain amount of accumulated water is discharged. At this time, the accumulated water level is generally lower than the bottom of the drain pipe, and the remaining accumulated water is discharged when the internal gas is discharged; Figure 2The pipe 2 shown includes a main valve 3. The inner cavity of the pipe 2 is blocked by the main valve 3 and forms a first area and a second area. The first area and the second area are each provided with a discharge pipe. The discharge equipment is provided at the top of the two discharge pipes. The pressure regulating structure includes a normally closed external port 56 provided at the sealing structure of the two discharge equipments. After the sealing structure is installed, the external port 56 is suitable for connecting the inner cavity at the top of the discharge pipe with the external environment. The pressure regulating structure also includes a pressurized pipe 13 and a stop valve 12 provided between the two external ports 56. Figure 3 As shown, in order to facilitate the external port 56 to connect the top space of the discharge pipe with the external environment, the external port 56 and the fixing member 55 are preferably formed in one piece, and a pressurized channel 11 is provided through the middle of the side wall of the fixing member 55, and the pressurized channel 11 is connected to the external port 56 to connect the top inner cavity of the discharge pipe with the external environment. Obviously, the external port 56 can be as shown. Figure 3 As shown, it is provided with internal threads. When not draining or inspecting, the external port 56 can be threadedly assembled with a sealing plug for sealing, and cooperate with the sealing of the first ball valve 6 and the second ball valve 9 below to achieve good sealing performance. When in use, if the pressurized pipe 13 is connected, it can be done by threaded assembly.

[0052] At this time, the normal working steps for draining the accumulated water are: (1) close both ends of the pipe 2, then close the main valve 3, close the switch valves 52 of the drainage pipes 51 on both sides, and install the sealing structure on the top of the first discharge pipe 1 and the second discharge pipe 10. At this time, both drainage pipes 51 are located above the valves, as shown in the figure. Figure 5 (2) Open the first ball valve 6 on the left, insert the drain pipe 51 on the left into the bottom of the pipe 2 in the first area on the left, and keep the second ball valve 9 on the right closed. Figure 6 (3) Open the switch valve 52 of the left drainage pipe 51, and the left side starts to drain. (4) After the drainage operation on the left side is completed, close the switch valve 52 of the left drainage pipe 51, pull the bottom of the drainage pipe 51 out to the top of the first ball valve 6 and close the first ball valve 6, open the main valve 3, open the connection between the two ends of the pipeline 2 and the gas source to replenish the air pressure, then close the connection between the two ends of the pipeline 2 and the gas source, close the main valve 3, open the second ball valve 9 on the right side, insert the bottom of the right drainage pipe 51 into the bottom of the pipeline 2 in the second area on the right side, then open the switch valve 52 of the right drainage pipe 51, and the right side starts to drain. (5) After the drainage operation on the right side is completed, close the switch valve 52 of the right drainage pipe 51, pull the right drainage pipe 51 out to the top of the second ball valve 9 and close the second ball valve. At this time, open the main valve 3, connect both sides of the pipeline 2 to the gas source, and restore the normal function of the pipeline 2. The above-mentioned gas source is the normal connection between the pipeline 2 and the natural gas pipeline.

[0053] The specific operation of pressurizing is that the drain pipe 51 on the discharge side (i.e. the left side) is kept at the bottom of the pipe 2 below the first discharge pipe 1, and the bottom of the drain pipe 51 on the other side (i.e. the right side) is located above the valve (i.e. the second ball valve 9) in the second discharge pipe 10, and the valve on this side is in the closed state. Figure 6 As shown, when the air pressure in the discharge pipe on the discharge side is insufficient, the stop valve 12 is opened, and the gas on the side not in the discharge state passes through the external port 56 on that side through the pressurized pipe 13 and then through the external port 56 on the other side into the discharge pipe on the side with insufficient air pressure, thereby increasing the air pressure on that side and discharging the residual water. Figure 7 shown. Figure 2 The second ball valve 9 shown is open, which is a state in which the second ball valve 9 is opened but the stop valve 12 is not opened yet. The next step is to open the stop valve 12 to connect the pressurized pipe 13, thereby allowing the gas in the second area on the right to enter the first area on the left for pressurization, so that the drain pipe 51 in the first area can discharge the accumulated water at the bottom. If the above drainage occurs in the first area, after draining the water in the first area, the stop valve 12 is closed, the on-off valve 52 is also closed, and then the drainage pipes 51 on both sides are raised above the valves and the valves are closed (i.e., the first ball valve 6 and the second ball valve 9 are both closed). At this time, the main valve 3 is also opened to allow air to be re-ventilated on both sides of the pipeline 2 to replenish the gas in the pipeline 2. Then, the two sides of the pipeline 2 are closed again, and the main valve 3 is closed. At this time, the second ball valve 9 on the right side is opened, and the drainage pipe 51 on the right side is inserted into the bottom of the pipeline 2. Then, the on-off valve 52 at the top of the right drainage pipe 51 is opened, and the right side begins to drain. When the air pressure is insufficient, the stop valve 12 and the first ball valve 6 are opened, and the gas in the first area enters the second area to increase the pressure, thereby draining the accumulated water in the second area. This completes the drainage of the pipeline 2.

[0054] In practice, once the air pressure on one side drops to a certain level, it can be determined to be insufficient. At this point, most of the accumulated water in the pipe has been removed. There's no need to wait until the air pressure drops completely to the point where air cannot escape (at this point, the air pressure inside pipe 2 is equal to or close to the atmospheric pressure outside) before opening the ball valve and stop valve 12 on the other side to increase pressure. Specifically, the stop valve 12 can be opened to increase pressure when the pressure inside the discharge pipe in the discharge state exceeds the set atmospheric pressure value. This ensures that the discharge pipe in the discharge state is in the discharge state throughout the entire drainage process. Directly opening the pressure increase at this point is sufficient to remove most or all of the accumulated water. Furthermore, since the bottom of the drain pipe 51 is above the liquid surface in the later stages of the discharge process, drainage occurs through gas-liquid entrainment. During the discharge process, residual water gradually accumulates at the bottom of the drain pipe 51 due to gas discharge. Therefore, if the stop valve 12 is opened to increase pressure only after the air pressure is insufficient, the accumulated residual water will disperse. At this point, pressurization will require gas discharge to allow the residual water to re-aggregate, wasting some air pressure and thus impairing the drainage effect. This is a preferred operating method in this embodiment.

[0055] The above-mentioned method of draining the accumulated water is combined with the structure of the double-diffusing pipe itself, and the accumulated water in the pipe 2 can be drained relatively cleanly without complicated operation. Figure 2 As shown, when the air pressure in the left first zone is insufficient, opening the main valve 3 allows the air in the right second zone to flow into the left first zone. However, this will cause the accumulated water in the right second zone to flow into the left first zone, making it difficult to drain the accumulated water on the left. Therefore, directly opening the main valve 3 is not a preferred solution.

[0056] In fact, the method of inserting the drainage pipes 51 on both sides into the bottom of the pipe 2 for drainage can also achieve drainage to a certain extent. At this time, there are two situations: (1) The main valve 3 can be in the open state. However, the disadvantage of this is that the air is exhausted on both sides at the same time, and the pressure at the bottom of the drainage pipes 51 on both sides is similar, so that the water between the drainage pipes 51 on both sides is subjected to similar or the same force on both sides. This is obviously not conducive to the drainage of the accumulated water in the middle of the pipe 2, and therefore it is not used as the preferred solution. (2) The main valve 3 can also be in the closed state. In this way, the air pressure in the pipes 2 on both sides drops at the same time. When draining, the accumulated water is affected by the discharge of the air flow and gathers on one side of the drainage pipe 51. At this time, if the ball valve and stop valve 12 on the other side are directly opened to increase the pressure, the accumulated water flow can not retreat due to the rapid pressure increase. If the pressure on both sides is insufficient at the same time, it is necessary to open the main valve 3 and open both sides of the pipe 2 to re-pressurize. In this way, the accumulated water will obviously disperse, which is not conducive to the discharge of gas. Combining the above solutions, it can be seen that the solution of draining on one side and pressurizing on the other side has higher drainage efficiency and better drainage effect, and thus is the preferred solution.

[0057] The second pressurization implementation scheme is still to use the pressure regulating structure to pressurize the pipeline 2 which is in the discharge state and has insufficient pressure. The pipeline 2 includes a main valve 3. The inner cavity of the pipeline 2 is blocked by the main valve 3 and forms a first area and a second area. The first area and the second area are respectively provided with a discharge pipe. Figure 8 As shown, the pressure-regulating structure includes an air pump removably mounted on top of the vent pipe that's not in the discharge state. The air pump increases pressure in the idle vent pipe on the other side. During normal drainage, the main valve 3 can be open, with one vent pipe used for drainage and the other for pressure increase. The air pump operates to increase pressure when the air pressure in the other vent pipe is insufficient. During drainage, the main valve 3 opens to connect the first and second areas. One vent pipe is connected to the discharge device 5 for drainage, while the other vent pipe is connected to the air pump, with the valve on that vent pipe closed. When the air pressure in one vent pipe is insufficient, the air pump starts operating and opens the valve on that side to increase the air pressure in pipe 2 and discharge any residual moisture.

[0058] The third pressurization implementation scheme mentioned in the first pressurization implementation scheme is that regulating valves are provided on both sides of the pipeline 2, and the outer sides of the regulating valves on both sides are connected to the gas source (that is, connected to the gas pipeline again), wherein the regulating valves and the gas source are not shown, but it does not affect understanding. The regulating valves on both sides form a pressure regulating structure. When the air pressure in the discharge pipe in the discharge state is insufficient, the drainage structure on both sides is raised to above the valve and then the valve is closed. Then, the regulating valves and the main valve 3 on both sides are opened to restore the air pressure on both sides to the delivery pressure, and then the drainage operation is continued. In the process of closing the main valve 3 to opening the main valve 3 and switching the regulating valves for pressurization, since the remaining water is originally gathered, the remaining accumulated water gathered during the pressurization is dispersed again. Therefore, even if pressurization is performed, the discharge effect is not as good as the first direct and uninterrupted pressurization implementation scheme.

[0059] In addition, the present application can also set the pressure regulating structure to a pressure reducing structure, such as Figure 9 As shown, the specific implementation plan is to set a collection container for collecting accumulated water on the outside of the drainage structure, and set a water pump at the other end of the collection container. When the accumulated water is discharged to insufficient air pressure, the water pump is turned on to pump out the water inside the container, and can also pump out part of the gas at the same time, so that the pressure in the container is reduced. When the residual air pressure inside the pipeline is greater than the pressure in the container, the residual water in the pipeline can be discharged.

[0060] Therefore, the pressure regulating structure and the pressure reducing structure described in the present application are integrated into a pressure regulating structure. The corresponding pressure regulating structure can ensure that the accumulated water is discharged by means of increasing the pressure inside the pressurized pipeline and reducing the external pressure of the discharge equipment. It can be applied to pipeline drainage operations under various working conditions. The pressure regulating structure is appropriately selected according to the pressure inside the pipeline and the external pressure (i.e., the pressure of the discharge environment). For example, when the inside of the pipeline is at normal pressure, negative pressure or high pressure, the corresponding scheme can be used for adjustment, and finally the pressure inside the pipeline is lower than the external pressure, thereby discharging the accumulated water inside the pipeline.

[0061] The following briefly describes the specific working method of this device after setting up the implementation plan of the first voltage regulation structure:

[0062] S1. Close the main valve 3. The medium in the pipeline is blocked by the main valve 3 and divided into two parts, left and right, forming initial air pressure on both sides.

[0063] S2. Close the ball valves on both sides, close the switch valves 52 of the drainage pipes 51 on both sides, and open the cover on the top of the vent pipe on one side at the same time. Install the drainage structure on the side with the open cover, wherein the drainage pipe 51 is inserted above the ball valve and the top of the vent pipe is closed by the sealing structure. Then open the ball valve on this side and insert the drainage pipe 51 to the bottom of the pipeline 2 to complete the installation of the drainage structure.

[0064] S3. Open the switch valve 52 at the top of the drain pipe 51 inserted into the bottom of the pipe 2 to drain water. The drain pipe 51 on the other side remains closed until the pressure on one side drops to the set value and most of the internal water is discharged. Then open the stop valve 12 of the pressurized pipe 13, and the gas on the side with higher pressure enters the side with lower pressure, so that the gas at the bottom of the drain pipe 51 in the discharge state is quickly discharged, and at the same time, the residual liquid on this side is taken away.

[0065] S4. Adjust the drainage structures on both sides to the initial state, close the stop valve 12 of the pressurized pipe 13, and at the same time open the main valve 3 and the regulating valves on both sides of the two lines for a period of time and then close them to restore the pressure in the areas on both sides of the main valve 3. Repeat steps S2 and S3 to completely drain the liquid on the other side and at the same time vent the residual medium in the pipe.

[0066] The above describes the principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the foregoing embodiments. The foregoing embodiments and description merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application, and such changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A device for discharging water from a pipeline, wherein the pipeline is used to transport gas and a discharge pipe is provided upwardly on the pipeline, characterized in that: The discharge equipment includes: a drainage structure adapted to connect the pipeline with the external environment; A sealing structure, wherein the sealing structure and the top port of the discharge pipe are detachably sealed, and the drainage structure is adapted to be sealed in the middle of the sealing structure and interspersed therewith for upward and downward adjustment; a pressure regulating structure adapted to regulate the pressure difference between the pipeline and the external environment; The discharge device is suitable for being installed from the top of the discharge pipe, and a valve is provided in the discharge pipe; during installation, the valve is closed to keep the pipe closed until the sealing structure is installed and the sealing structure and the drainage structure block the top of the discharge pipe, and then the valve is opened. Subsequently, the drainage structure is inserted into the bottom of the pipe so that the air pressure inside the pipe presses the accumulated water into the drainage structure for discharge; when the air pressure in the pipe is insufficient, the pressure regulating structure is activated to make the air pressure in the pipe higher than the air pressure of the external environment, thereby discharging the accumulated water; The drainage structure includes a drainage pipe and an on-off valve arranged on the top of the drainage pipe. When installed, the on-off valve is closed to isolate the drainage pipe from the external environment, and the on-off valve is opened when the drainage pipe is inserted into the bottom of the pipeline. The pipeline includes a main valve, the inner cavity of the pipeline is blocked by the main valve to form a first area and a second area, and the first area and the second area are respectively provided with a discharge pipe; The discharge device is provided at the top of the two discharge pipes, and the pressure regulating structure includes a normally closed external port provided at the sealing structure and a pressurized pipe and a stop valve provided between the two external ports on both sides. The external port and the sealing structure are integrally formed, and a pressurized channel is provided through the middle of the side wall of the sealing structure. After the sealing structure is installed, the pressurized channel and the external port and the inner cavity of the discharge pipe are all connected. After the sealing structure is installed, the external port is suitable for connecting the top inner cavity of the discharge pipe with the external environment when it is opened. The drain pipe on the side in the discharge state is inserted into the bottom of the pipe, and the bottom of the drain pipe on the other side is located above the valve, and the valve on this side is in a closed state. When the air pressure in the discharge pipe on the side in the discharge state is insufficient, the stop valve is opened, and the valve on the other side is opened. The gas on the side that is not in the discharge state passes through the pressurized pipe from the external port on this side and then passes through the external port on the other side into the discharge pipe on the side with insufficient air pressure, so as to increase the air pressure on this side and discharge residual moisture.

2. The pipe water discharge device according to claim 1, characterized in that: The sealing structure includes a fixing member and an elastic part. The fixing member and the elastic part are coaxial and fixed to each other, and a passage cavity for the drainage pipe to pass through is provided in the middle of both. The fixing member is sealed and installed at the top port of the discharge pipe. The drain pipe passes through the through cavity. The elastic part is suitable for adjusting the clamping degree between it and the drain pipe so that the drain pipe can keep a fixed position during the discharge process.

3. The pipe water discharge device according to claim 2, characterized in that: The elastic part includes an elastic outer part, a sealing part and an elastic inner part. The elastic outer part and the elastic inner part are fixedly assembled and the degree of clamping of the drain pipe is increased during the assembly process. The sealing part is arranged in the inner cavity of the elastic inner part and is compressed through the top inner wall of the elastic outer part. The through cavity is formed at the center of the sealing part. The elastic inner part and the fixing part are fixedly installed.

4. The pipe water discharge device according to claim 1, characterized in that: The stop valve opens when the air pressure inside the discharge pipe on the discharge state side is higher than the atmospheric pressure setting range, so that the air pressure of the discharge pipe on the discharge state side is always in the exhaust state before the drainage operation is completed.

5. The pipe water discharge device according to claim 1, characterized in that: The pressure regulating structure includes an air pump detachably mounted on the top of the discharge pipe. During drainage, the main valve is opened to connect the first area and the second area, the bleed pipe on one side is connected to the discharge equipment for drainage, and the bleed pipe on the other side is connected to the air pump, and at the same time, the valve of the bleed pipe on this side is closed. When the air pressure in the bleed pipe in the discharge state is insufficient, the air pump starts working and opens the valve on this side to increase the air pressure in the pipe and discharge residual water.

6. The pipe water discharge device according to claim 1, characterized in that: The pressure regulating structure includes regulating valves arranged on both sides of the pipeline, and the outer sides of the regulating valves on both sides are connected to the gas source. When the air pressure in the vent pipe in the discharge state is insufficient, the drainage structure is raised to above the valve and then the valve is closed. The regulating valves and the main valve on both sides are then opened to restore the air pressure on both sides to the delivery pressure. The drainage structure is then inserted to continue the drainage operation.

7. The pipe water discharge device according to claim 1, characterized in that: The pressure regulating structure includes a collecting container and a water pump arranged on the outside of the drainage structure. The water pump is suitable for extracting the liquid and / or gas inside the collecting container when the pressure inside the pipeline is insufficient, so that the pressure inside the collecting container is lower than the pressure inside the pipeline.

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