Pipeline accumulated water discharge equipment

Abstract

The invention discloses pipeline accumulated water discharging equipment which mainly comprises a water discharging structure, a sealing structure and a pressure adjusting structure, and the pressure adjusting structure is suitable for adjusting the air pressure difference between a pipeline and the external environment; the discharge equipment is suitable for being mounted from the top of the bleeder, and a valve is arranged in the bleeder; during installation, the valve is closed so that the pipeline can be kept closed, the valve is opened until the sealing structure is installed and the sealing structure and the drainage structure block the top of the diffusion pipe, and then the drainage structure is inserted into the bottom of the pipeline. And the accumulated water is pressed into the drainage structure by the air pressure in the pipeline to be discharged. The arranged discharging device presses out accumulated water through air pressure in the pipeline, through cooperation of a sealing structure and a drainage structure, air loss in the pipeline can be prevented before drainage, so that pressure is reduced, and the accumulated water in the pipeline is discharged more completely.

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: 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 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.

[0006] 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.

[0007] As a preference, the sealing structure includes a fixing member and a tightening portion. The fixing member and the tightening portion are coaxially and fixedly arranged with each other, and through cavities for the drain pipe to pass through are provided in the middle of both of them. The fixing member is sealingly installed at the top port of the blow-off pipe. The drain pipe passes through the through cavity, and the tightening portion is adapted to adjust the clamping degree between it and the drain pipe so that the drain pipe remains fixed in position during the discharging process.

[0008] As a preference, the tightening portion includes a tightening outer member, a sealing member and a tightening inner member. The tightening outer member and the tightening inner member are fixedly assembled and the clamping degree on the drain pipe increases during the assembly process. The sealing member is arranged in the inner cavity of the tightening inner member and is pressed by the top inner wall of the tightening outer member. The through cavity is formed at the center of the sealing member, and the tightening inner member and the fixing member are fixedly installed.

[0009] 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 one blow-off pipe is provided in each of the first area and the second area.

[0010] As a preference, the discharging device is provided at the top of both of the blow-off pipes. The pressure regulating structure includes a normally closed external connection port provided at the sealing structure and a pressurizing pipeline and a stop valve provided between the two external connection ports on both sides. The external connection port and the sealing structure are integrally formed. A pressurizing channel is vertically penetrated through the middle of the side wall of the sealing structure. After the sealing structure is installed, the pressurizing channel is communicated with the external connection port and the inner cavity of the blow-off pipe. After the sealing structure is installed, when the external connection port is opened, it is adapted to communicate the top inner cavity of the blow-off pipe with the external environment. The drain pipe on the side in the discharging state is inserted into the bottom of the pipeline, and the bottom of the drain pipe on the other side is located above the valve and the valve on that side is in the closed state. When the air pressure in the blow-off pipe on the discharging state side is insufficient, the stop valve is opened, and the gas on the side not in the discharging state enters the blow-off pipe on the side with insufficient air pressure from the external connection port on that side through the pressurizing pipeline and then through the external connection port on the other side to increase the air pressure on that side and thereby discharge the residual moisture.

[0011] As a preference, the stop valve is opened when the internal air pressure in the blow-off pipe on the discharging state side is higher than the set range of the atmospheric pressure, so that the air pressure in the blow-off pipe on the discharging state side is always in the exhaust state before the end of the drainage operation.

[0012] As a preference, the pressure regulating structure includes an air pump detachably installed at the top of the blow-off pipe. When draining water, the main valve is opened to connect the first area and the second area. One side of the blow-off pipe is connected to the discharge device for draining water, and the other side of the blow-off pipe is connected to the air pump while the valve on this side of the blow-off pipe is closed. When the air pressure in the blow-off pipe in the discharge state is insufficient, the air pump starts to work and opens the valve on this side to increase the air pressure in the pipeline and discharge the residual water.

[0013] As a preference, the pressure regulating structure includes regulating valves arranged on both sides of the pipeline. The outer sides of the regulating valves on both sides are connected to the air source. When the air pressure in the blow-off pipe in the discharge state is insufficient, the drainage structure is raised above the valve and then the valve is closed. Subsequently, the regulating valves and the main valve on both sides are opened to restore the air pressure on both sides to the conveying pressure. Then, the drainage structure is inserted to continue the drainage operation.

[0014] As a preference, the pressure regulating structure includes a collection container and a water pump arranged outside the drainage structure. The water pump is adapted to pump out the liquid and / or gas inside the collection container when the pressure inside the pipeline is insufficient, so that the pressure inside the collection container is less than the pressure inside the pipeline.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: (1) Through the provided discharge device, the accumulated water is pressed out by the air pressure in the pipeline, which is simple to implement, and the drainage device has a compact structure and is easy to carry. On the other hand, through the cooperation of the sealing structure and the drainage structure, the loss of gas in the pipeline can be prevented before draining water, thereby reducing the pressure. The relatively large air pressure enables the accumulated water in the pipeline to be discharged more completely.

[0016] (2) The setting of the pressure regulating device enables the drainage operation to be carried out when the pressure inside the pipeline is at normal pressure, high pressure or even negative pressure relative to the external pressure. Moreover, through the pressure regulation of the pressure regulating structure, it can be ensured that the accumulated water is discharged more cleanly. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the present application when using a drainage device for discharge operation.

[0018] Figure 2 is a cross-sectional view of a use state when the present application uses two drainage devices in combination for discharge operation.

[0019] Figure 3 is Figure 2 the schematic diagram of the cooperation between the top of the first blow-off pipe and the sealing structure and the drainage structure in

[0020] Figure 4 is Figure 2 The top view of the overall structure in

[0021] Figure 5 is the schematic diagram when the sealing structures are installed at both ends of the double-relief ball valve pipeline.

[0022] Figure 6 is Figure 2 The cross-sectional view of part of the structure in a use state after using one of the pressure-regulating structures.

[0023] Figure 7 is Figure 5 The schematic diagram when the pressure-regulating structure in is opened.

[0024] Figure 8 3]is the schematic diagram when regulating the pressure by using an air pump.

[0025] Figure 9 is the schematic diagram when regulating the pressure by using a water pump.

[0026] In the figure: 1. The first relief pipe; 2. The pipeline; 3. The main valve; 4. The valve stem; 5. The discharging device; 51. The drain pipe; 52. The switch valve; 53. The tightening outer part; 54. The seal; 55. The fixing part; 56. The external connection port; 57. The tightening inner part; 6. The first ball valve; 7. The fixing seat; 9. The second ball valve; 10. The second relief pipe; 11. The pressurizing channel; 12. The stop valve; 13. The pressurizing pipeline. Specific embodiments

[0027] Next, in combination with specific embodiments, the present application will be further described. It should be noted that on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0028] In the description of the present application, it should be noted that for orientation terms, if there are terms such as "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", ""front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and position relationship is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 protection scope of the present application.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not have to be used to describe a specific order or sequence.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] like Figure 1 、 Figure 2 As shown, the discharge equipment mainly includes: drainage structure and sealing structure.

[0035] The drainage structure is used to connect the pipeline 2 with the external environment and provide a flow path for drainage.

[0036] The sealing structure therein and the top port of the blow-off pipe are detachably and sealingly installed, and the drainage structure is sealed in the middle of the sealing structure and is inserted and arranged for up and down adjustment. A valve is arranged in the blow-off pipe. During installation, the valve is closed to keep the pipeline 2 closed until the sealing structure is installed, and the valve is opened after the sealing structure and the drainage structure block the top of the blow-off pipe. Subsequently, the drainage structure is inserted into the bottom of the pipeline 2 so that the air pressure inside the pipeline 2 presses the accumulated water into the drainage structure for discharge.

[0037] Because when normal maintenance and other work are carried out on the blow-off pipe, the discharge device 5 is not installed. At this time, as Figure 2 shown, the valves (i.e., the first ball valve 6 and the second ball valve 9) are closed, and the sealing structure is installed at the top of the blow-off pipe. Coupled with the factor that the valves are closed, in order to prevent internal air pressure leakage before drainage, a relatively closed environment inside the blow-off pipe needs to be ensured. Therefore, in this embodiment, the valve cannot be directly opened and then the discharge device 5 is installed. The sealing structure needs to be installed in place first, and then the valve is opened and the drainage structure is inserted to carry out drainage. Therefore, the drainage structure in this embodiment needs to be able to move relative to the sealing structure to adjust the entry of the drainage structure. Through the arrangement that the drainage structure is inserted in the middle of the sealing structure, it can be ensured that there is a relatively sufficient air pressure inside the blow-off pipe before drainage, and the pressure relief starts only after drainage. Of course, if there is no on-off valve 52 to control the drainage structure, when the valve is opened after the sealing structure is installed, at this time, the blow-off pipe has already started to press a certain amount of gas into the drainage structure. Therefore, if there is no closing effect of the on-off valve 52, it is necessary to quickly insert the drainage structure to the bottom of the pipeline 2 when the valve is opened. If there is too much liquid in the pipeline 2, the bottom of the drainage structure will be immersed in the water at this time. If there is less liquid in the pipeline 2, the drainage structure may not be immersed in the liquid at this time. However, when the gas passes through the drainage structure for discharging materials, the gas flow rate in the pipeline is large and the pressure is small, which will entrain the internal liquid at the bottom of the drainage structure, thus achieving the effect of liquid discharge.

[0038] By setting the discharge device 5, the accumulated water is pressed out by the air pressure in the pipeline 2, which is simple to implement, and the drainage device has a compact structure and is easy to carry. On the other hand, through the cooperation of the sealing structure and the drainage structure, the loss of gas inside the pipeline 2 can be prevented and the pressure can be reduced before drainage, and the relatively large air pressure makes the accumulated water in the pipeline drain more completely.

[0039] In order to make the discharge device easy to use, preferably, the drainage structure includes a drainage pipe 51 and an on-off valve 52 arranged at the top of the drainage pipe 51. During installation, the on-off valve 52 is closed to keep the drainage pipe 51 and the external environment closed until the on-off valve 52 is opened when the drainage pipe 51 is inserted into the bottom of the pipeline 2.

[0040] The following presents an embodiment of a preferred sealing structure.

[0041] As Figure 2 , Figure 3 shown, the sealing structure includes a fixing member 55 and a tightening portion. The fixing member 55 and the tightening portion are coaxial and fixedly arranged with each other, and through cavities for the drain pipe 51 to pass through are provided in the middle of both. The fixing member 55 is sealingly installed at the top port of the relief pipe, the drain pipe 51 passes through the through cavity, and the tightening portion is adapted to adjust the clamping degree between it and the drain pipe 51 so that the drain pipe 51 remains fixed in position during the discharge process. As Figure 3 shown, the tightening portion includes a tightening outer member 53, a sealing member 54 and a tightening inner member 57. The tightening outer member 53 and the tightening inner member 57 are fixedly assembled and the clamping degree on the drain pipe 51 increases during the assembly process. The sealing member 54 is arranged in the inner cavity of the tightening inner member 57 and is pressed by the top inner wall of the tightening outer member 53. The through cavity is formed at the center of the sealing member 54, and the tightening inner member 57 and the fixing member 55 are fixedly installed.

[0042] As Figure 3 shown, the tightening outer member 53 is usually threadedly connected to the tightening inner member 57. As the thread fit progresses, the tightening inner member 57 is gradually pressed (this is a common existing technology), so that the internal sealing member 54 presses the drain pipe 51 to ensure sealing. Of course, even without pressing, the sealing member 54 and the drain pipe 51 have a certain sealing performance after being fitted. The sealing member 54 is made of an elastic material with good sealing performance, such as rubber. The tightening inner member 57 and the fixing member 55 can be fixed in forms such as bonding, welding, interference fit or threaded assembly. The fixing member 55 and the relief pipe are fixed by means such as interference fit and threaded assembly in a detachable manner.

[0043] When the common gas transmission pipeline 2 is draining water, the initial conveying pressure in the pipeline is generally greater than the atmospheric pressure. In order to prevent continuous entry of gas and excessive leakage, which may cause waste and danger, both sides of the pipeline 2 are generally blocked during drainage, thus forming a relatively closed environment. The water in the pipeline 2 is drained by the residual pressure inside. Therefore, when the residual pressure in the pipe is continuously released, the pressure inside the pipeline 2 gradually decreases, inevitably resulting in insufficient pressure in the pipeline 2, so that the water inside the pipeline 2 may not be completely drained. To solve this problem, the present embodiment preferentially adopts a pressurization implementation scheme, and several specific implementation schemes are given below.

[0044] The first pressurization implementation scheme is that the pressure regulating structure pressurizes the pipeline 2 in the discharge state and with insufficient pressure. A common working condition is that after a certain amount of accumulated water is discharged from the gas transmission pipeline 2, the internal air pressure gradually decreases. At this time, the accumulated water level is generally lower than the bottom of the drain pipe, and the remaining accumulated water is discharged by being entrained during the internal gas discharge; As Figure 2The pipeline 2 shown 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. A bleeder pipe is provided in each of the first area and the second area; the discharging device is provided at the top of both bleeder pipes. The pressure regulating structure includes a normally closed external connection port 56 provided at the sealing structure of the two discharging devices. After the sealing structure is installed, the external connection port 56 is adapted to connect the top inner cavity of the bleeder pipe and the external environment, and the pressure regulating structure further includes a pressurizing pipeline 13 and a stop valve 12 provided between the two external connection ports 56. As Figure 3 shown, in order to facilitate the connection between the external connection port 56 and the top space of the bleeder pipe and the external environment, preferably the external connection port 56 and the fixing member 55 are integrally formed. A pressurizing channel 11 is vertically penetrated through the middle of the side wall of the fixing member 55, and the pressurizing channel 11 is communicated with the external connection port 56 to connect the top inner cavity of the bleeder pipe and the external environment. Obviously, the external connection port 56 can be as Figure 3 shown, which is provided with internal threads. When draining water and maintenance are not carried out, the external connection port 56 can be sealed by screwing and assembling a sealing plug, and good sealing performance can be achieved by cooperating with the blocking of the first ball valve 6 and the second ball valve 9 below. When in use, if the pressurizing pipeline 13 is connected, it can be carried out in the form of screwing and assembling.

[0045] The normal working steps for draining accumulated water at this time are: (1) Close both ends of the pipeline 2, then close the main valve 3, close the switching valves 52 of the drain pipes 51 on both sides, and install the sealing structure on the tops of the first bleeder pipe 1 and the second bleeder pipe 10. At this time, both drain pipes 51 are located above the valves, as Figure 5 shown; (2) Open the first ball valve 6 on the left side, insert the drain pipe 51 on the left side to the bottom of the pipeline 2 in the left first area, and keep the second ball valve 9 on the right side closed, which can be referred to Figure 6 ; (3) Open the switching valve 52 of the drain pipe 51 on the left side, and start draining water on the left side; (4) After the draining operation on the left side is completed, close the switching valve 52 of the drain pipe 51 on the left side, pull out the bottom of the drain pipe 51 above the first ball valve 6 and close the first ball valve 6, open the main valve 3, open the connection between both ends of the pipeline 2 and the gas source to supplement air pressure, then close the connection between both 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 drain pipe 51 on the right side to the bottom of the pipeline 2 in the right second area, and then open the switching valve 52 of the drain pipe 51 on the right side, and start draining water on the right side; (5) After the draining operation on the right side is completed, close the switching valve 52 of the drain pipe 51 on the right side, pull out the drain pipe 51 on the right side above the second ball valve and close the second ball valve. At this time, open the main valve 3 and connect both sides of the pipeline 2 with the gas source to restore the normal function of the pipeline 2. The above gas source is the normal connection between the pipeline 2 and the natural gas pipeline.

[0046] The specific operation of applying pressure correspondingly is that the drain pipe 51 on the side in the discharge state (i.e., the left side) remains at the bottom of the pipe 2 below the first relief pipe 1, and the bottom of the drain pipe 51 on the other side (i.e., the drain pipe 51 on the right side) is above the valve in the second relief pipe 10 (i.e., the second ball valve 9), and the valve on this side is in the closed state. At this time, as Figure 6 shown, when the air pressure in the relief pipe on the discharge state side is insufficient, the stop valve 12 is opened, and the gas on the side not in the discharge state enters the relief pipe on the side with insufficient air pressure through the external connection port 56 on this side, then through the pressure boosting pipe 13, and then through the external connection port 56 on the other side, so as to increase the air pressure on this side and further discharge the residual moisture. At this time, as Figure 7 shown. Figure 2 The second ball valve 9 shown is open, which is in the state of opening the second ball valve 9 and not yet opening the stop valve 12. The next step is to open the stop valve 12 to connect the pressure boosting pipe 13, so that the gas in the second area on the right side enters the first area on the left side for pressure boosting, so that the drain pipe 51 in the first area discharges the accumulated water at the bottom. Suppose the above drainage occurs in the first area. After discharging the water in the first area, close the stop valve 12 and the switch valve 52. Then, raise both drain pipes 51 above the valve and close the valves (i.e., both the first ball valve 6 and the second ball valve 9 are closed). At this time, the main valve 3 is also opened to allow the two sides of the pipe 2 to be ventilated again, so as to supplement the gas in the pipe 2. Then, close both sides of the pipe 2 so that both sides of the pipe 2 are closed again, and at the same time, close the main valve 3. At this time, open the second ball valve 9 on the right side and insert the drain pipe 51 on the right side to the bottom of the pipe 2. Then, open the switch valve 52 at the top of the drain pipe 51 on the right side, and the right side starts to drain. When the air pressure is insufficient, open the stop valve 12 and the first ball valve 6, and the gas in the first area enters the second area for pressure boosting, so as to discharge the accumulated water inside the second area. In this way, the drainage of the pipe 2 is completed.

[0047] In fact, when the air pressure on one side drops to a certain level, it can be determined that the air pressure is insufficient. At this time, most of the accumulated water in the pipeline has been discharged, and there is no need to wait until the air pressure completely drops to the point where no air can be discharged (at this time, the internal air pressure of pipeline 2 is the same as or close to the external atmospheric pressure) before opening the ball valve and stop valve 12 on the other side for pressurization. That is, when the internal pressure of the blow-off pipe in the discharge state is greater than the set value of the atmospheric pressure, the stop valve 12 can be opened for pressurization, so as to ensure that the blow-off pipe in the discharge state is in a deflation state throughout the drainage operation. At this time, directly opening for pressurization is sufficient to discharge the vast majority of the accumulated water or completely discharge the accumulated water. At the same time, since the bottom of the drain pipe 51 is above the liquid level in the later stage of discharge and drains water in the form of gas-liquid entrainment, during the discharge process, the remaining accumulated water gradually accumulates below the drain pipe 51 due to gas discharge. Therefore, if the stop valve 12 is opened for pressurization until the air pressure is insufficient, the accumulated remaining water will disperse. When pressurizing at this time, it is also necessary to let the remaining accumulated water re-accumulate through gas discharge, which will waste a part of the air pressure and thus deteriorate the discharge effect. This is a preferred operation method of this embodiment.

[0048] The above-mentioned method of discharging accumulated water matches the structure of the double blow-off pipes. Without complicated operation, it can relatively cleanly discharge the accumulated water in pipeline 2. As Figure 2 shown, when the air pressure in the left first area is insufficient, by opening the main valve 3, the gas in the right second area can also enter the left first area. However, in this case, the accumulated water in the right second area will flow into the left first area, making it difficult to completely drain the accumulated water on the left. Therefore, directly opening the main valve 3 is not used as a preferred solution.

[0049] In fact, the method of inserting the drain pipes 51 on both sides into the bottom of the pipeline 2 for drainage can also drain water to a certain extent. At this time, it is divided into the following two situations: (1) The main valve 3 can be in an open state. However, the disadvantage of this is that exhaust is carried out on both sides at the same time, and the pressures at the bottoms of the drain pipes 51 on both sides are similar, making the forces on both sides of the water in the interval between the drain pipes 51 on both sides similar or the same. This is obviously not conducive to discharging the accumulated water in the middle of the pipeline 2, so it is not used as a preferred solution either. (2) The main valve 3 can also be in a closed state. In this way, the air pressures on both sides of the pipeline 2 drop simultaneously. During drainage, the accumulated water is affected by the air flow discharge and accumulates on one side towards the drain pipe 51. At this time, if the ball valve and stop valve 12 on the other side are directly opened for pressurization, the accumulated water flow can not flow back due to the rapid pressurization. If the air pressures on both sides are insufficient at the same time, it is necessary to open the main valve 3 and re-pressurize both sides of the pipeline 2. In this case, the accumulated water will obviously disperse, which is not conducive to gas discharge. Considering the above solutions, it can be seen that the scheme of draining water on one side and using the other side for pressurization has higher drainage efficiency and better drainage effect, so it is used as a preferred implementation scheme.

[0050] The second pressurization implementation still involves the pressure regulating structure pressurizing the pipeline 2 that 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 to form a first area and a second area. A bleed pipe is provided in each of the first area and the second area. As Figure 8 shown, the pressure regulating structure includes an air pump detachably installed at the top of the bleed pipe that is not in the discharge state. Through the action of the air pump, the idle bleed pipe on the other side is pressurized. At this time, during normal drainage, the main valve 3 can be in the open state. One bleed pipe is used for drainage, and the other bleed pipe is used for pressurization. The air pump operates to pressurize when the air pressure in the other bleed pipe is insufficient. When draining water, the main valve 3 is opened to connect the first area and the second area. One bleed pipe is connected to the discharge device 5 for drainage, and the other bleed pipe is connected to the air pump. At the same time, the valve of this side's bleed pipe is closed. When the air pressure in one bleed pipe is insufficient, the air pump starts to work and opens the valve of this side to increase the air pressure in the pipeline 2 and discharge the residual water.

[0051] The third pressurization implementation is mentioned in the first pressurization implementation. Adjusting valves are provided on both sides of the pipeline 2. The outside of the adjusting valves on both sides is connected to the gas source (that is, reconnected to the gas pipeline). The adjusting valves and the gas source are not shown, but it does not affect the understanding. The adjusting valves on both sides form a pressure regulating structure. When the air pressure in the bleed pipe in the discharge state is insufficient, the drainage structures on both sides are raised above the valves and then the valves are closed. Then, the adjusting valves and the main valve 3 on both sides are opened to restore the air pressure on both sides to the conveying pressure. Then, the drainage operation continues. During the process of closing the main valve 3 to opening the main valve 3 and switching the adjusting valves for pressurization, since the remaining water was originally aggregated, the aggregated remaining accumulated water is dispersed again during pressurization. Therefore, even when pressurized, the discharge effect is not as good as that of the first implementation of direct and continuous pressurization.

[0052] In addition, the pressure regulating structure of the present application can also be set as a pressure reducing structure. As Figure 9 shown, its specific implementation is to provide a collection container for collecting accumulated water outside the drainage structure, and a water pump is provided at the other end of the collection container. When discharging the accumulated water until the air pressure is insufficient, the water pump is turned on. The water pump pumps the water inside the container away and can also pump away some gas at the same time, reducing the pressure inside the container. When the residual air pressure inside the pipeline is greater than the pressure inside the container, the residual accumulated water inside the pipeline can be discharged.

[0053] Therefore, the pressure regulating structure and the pressure reducing structure described in this application are integrated into a pressure regulating structure. The corresponding pressure regulating structure can ensure the complete drainage of accumulated water by means of increasing the pressure inside the pressurized pipeline and reducing the pressure outside the discharge device, and can be applied to pipeline drainage operations under various working conditions. The pressure regulating structure is appropriately selected according to the internal pressure and external pressure of the pipeline (i.e., the pressure of the discharge environment). For example, when the internal part of the pipeline is in a normal pressure, negative pressure or high pressure state, corresponding solutions can be adopted for adjustment, ultimately making the internal pressure of the pipeline less than the external pressure, so as to drain the accumulated water inside the pipeline.

[0054] The following briefly describes the specific working method of this device after implementing the first pressure regulating structure: S1. Close the main valve 3. The medium inside the pipeline is blocked by the main valve 3 and divided into left and right parts, forming the initial air pressures on both sides.

[0055] S2. Close both side ball valves, close the on-off valves 52 of both side drain pipes 51, and at the same time open the cover on the top of the relief pipe on one side. Install the drainage structure on the side where the cover is opened. The drain pipe 51 is inserted above the ball valve and the top of the relief pipe is sealed through a sealing structure. Then open the ball valve on this side and insert the drain pipe 51 to the bottom of the pipeline 2 to complete the installation of the drainage structure.

[0056] S3. Open the on-off valve 52 at the top of the drain pipe 51 inserted to the bottom of the pipeline 2 for drainage. 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 moisture is discharged, open the stop valve 12 of the pressurized pipeline 13. The gas on the side with higher pressure enters the side with lower pressure, enabling the gas at the bottom of the drain pipe 51 in the discharge state to be quickly discharged, and at the same time taking away the residual liquid on this side.

[0057] S4. Adjust the drainage structures on both sides to the initial state, close the stop valve 12 of the pressurized pipeline 13, and at the same time open the main valve 3 and the regulating valves on both sides of the two paths for a period of time and then close them, so that the areas on both sides of the main valve 3 restore pressure. Repeat steps S2 and S3 to completely discharge the liquid on the other side, and at the same time empty the residual medium inside the pipeline.

[0058] The above describes the principle, main features and advantages of this application. Those skilled in the art of this industry should understand that this application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of this application. Without departing from the spirit and scope of this application, this application will have various changes and improvements, and these changes and improvements all fall within the scope of this application claimed. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A pipeline water accumulation discharge device, the pipeline is used for conveying gas, and a blow-off pipe is arranged upward on the pipeline, and it is characterized in that, The discharge device includes: A drainage structure adapted to connect the pipeline and the external environment; A sealing structure detachably and sealingly installed at the top port of the relief pipe, and the drainage structure is adapted to be sealingly and inserted through the middle of the sealing structure for vertical adjustment; A pressure regulating structure adapted to regulate the air pressure difference between the pipeline and the external environment; The discharge device is adapted to be installed from the top of the relief pipe, and a valve is provided in the relief pipe; when installing, 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 relief pipe, then the valve is opened, and then the drainage structure is 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; when the air pressure in the pipeline is insufficient, the pressure regulating structure works to make the air pressure in the pipeline higher than the air pressure of the external environment, so as to discharge the accumulated water.

2. The pipeline water accumulation drainage device according to claim 1, characterized in that The drainage structure includes a drain pipe and a switch valve provided at the top of the drain pipe. When installing, the switch valve is closed to seal the drain pipe and the external environment, and the switch valve is opened until the drain pipe is inserted into the bottom of the pipeline.

3. The pipeline water accumulation drainage device according to claim 2, characterized in that, The sealing structure includes a fixing member and a tightening portion. The fixing member and the tightening portion are coaxially and fixedly arranged, and through cavities for the drain pipe to pass through are provided in the middle of both of them. The fixing member is sealingly installed at the top port of the relief pipe, the drain pipe passes through the through cavity, and the tightening portion is adapted to adjust the clamping degree between it and the drain pipe to keep the drain pipe fixed in position during discharge.

4. The pipeline water accumulation drainage device according to claim 3, wherein The tightening portion includes a tightening outer member, a sealing member and a tightening inner member. The tightening outer member and the tightening inner member are fixedly assembled and the clamping degree on the drain pipe increases during the assembly process. The sealing member is arranged in the inner cavity of the tightening inner member and is pressed by the top inner wall of the tightening outer member. The through cavity is formed at the center of the sealing member, and the tightening inner member is fixedly installed with the fixing member.

5. The pipeline water accumulation drainage device according to any one of claims 1-4, characterized in that, 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 one relief pipe is provided in each of the first area and the second area.

6. The pipeline water accumulation drainage device according to claim 5, characterized in that, The discharge device is provided at the top of both of the relief pipes. The pressure regulating structure includes a normally closed external connection port provided at the sealing structure and a pressurizing pipeline and a stop valve provided between the two external connection ports on both sides. The external connection port and the sealing structure are integrally formed. A pressurizing channel is vertically penetrated through the middle of the side wall of the sealing structure. After the sealing structure is installed, the pressurizing channel is communicated with the external connection port and the inner cavity of the relief pipe. After the sealing structure is installed, when the external connection port is opened, it is adapted to communicate the top inner cavity of the relief pipe and the external environment. 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 the closed state. When the air pressure in the blow-off 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 enters the blow-off pipe on the side with insufficient air pressure through the external connection port on this side, the pressurizing pipe, and then through the external connection port on the other side, so as to increase the air pressure on this side and discharge the residual moisture.

7. The pipeline water accumulation drainage device according to claim 6, wherein The stop valve is opened when the internal air pressure in the blow-off pipe on the side in the discharge state is higher than the atmospheric pressure setting range, so that the air pressure in the blow-off pipe on the side in the discharge state is always in the exhaust state before the end of the drainage operation.

8. The pipeline water accumulation drainage device according to claim 5, characterized in that, The pressure regulating structure includes an air pump detachably installed at the top of the blow-off pipe. During drainage, the main valve is opened to connect the first area and the second area. The blow-off pipe on one side is connected to the discharge equipment for drainage, and the blow-off pipe on the other side is connected to the air pump and the valve on this side of the blow-off pipe is closed at the same time. When the air pressure in the blow-off pipe in the discharge state is insufficient, the air pump starts to work and the valve on this side is opened to increase the air pressure in the pipe and discharge the residual moisture.

9. The pipeline water accumulation drainage device according to claim 5, wherein, The pressure regulating structure includes regulating valves provided on both sides of the pipe, and the outside of the regulating valves on both sides is connected to the air source. When the air pressure in the blow-off pipe in the discharge state is insufficient, the drainage structure is raised above 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 conveying pressure. Then the drainage structure is inserted to continue the drainage operation.

10. The pipeline water accumulation discharge device according to claim 5, characterized in that, The pressure regulating structure includes a collection container and a water pump provided outside the drainage structure. The water pump is adapted to pump out the liquid and / or gas inside the collection container when the internal pressure of the pipe is insufficient, so that the pressure inside the collection container is less than the pressure inside the pipe.

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