An overhead conduit drain trap

Abstract

The utility model relates to the technical field of water drain trap, especially pipeline water drain trap, and mainly aims at the following technical scheme for the problems of inconvenient maintenance, low drainage efficiency and lack of anti-backflow design of traditional water drain device: including main pipeline section, water drain branch pipe section, drainage terminal, the water drain branch pipe section is composed of first L shape branch pipe and second L shape branch pipe, the second L shape branch pipe is communicated with first L shape branch pipe, the utility model quickly leads out the condensate water in the main pipeline through the water drain branch pipe section, can not only discharge the effusion in time to avoid the water hammer phenomenon, guarantees the safe operation of overhead pipeline system, but also can concentrate the condensate water and discharge into the nearby sewer, meets the environmental protection requirement and eliminates the security risk of random drainage in overhead area, on the other hand, the multistage stop valve setting not only can control the water drain branch road on-off flexibly, but also can quickly cut off the branch road to reduce the difficulty and risk of high-altitude operation, improve the maintenance convenience.

Description

Technical Field

[0001] This utility model relates to the field of drainage joint technology, and in particular to pipeline drainage joints. Background Technology

[0002] In industrial production, overhead pipelines (such as steam pipelines and chemical gas fluid pipelines) are widely used in factories, power plants, chemical industrial parks and other scenarios. Because overhead pipelines are exposed to the external environment, steam or high-temperature gas fluids are prone to condensation due to heat dissipation inside the pipeline. If the condensate cannot be discharged in time, it will form a water plug inside the pipeline. When the water plug is pushed by high-speed fluid, water hammer will occur, causing pipeline vibration, valve damage or even pipeline rupture, which seriously threatens the safe operation of the system.

[0003] Meanwhile, traditional drainage devices have the following shortcomings: First, they are inconvenient to maintain, especially in high-altitude operation scenarios of overhead pipelines, where disassembly and assembly are difficult; second, they have low drainage efficiency and cannot quickly discharge large amounts of condensate; third, they lack anti-backflow design, which can easily lead to drainage backflow affecting the medium transport in the main pipeline; and fourth, impurities and sewage in the pipeline cannot be discharged. These problems are more prominent in overhead pipeline operation conditions, and a targeted drainage solution is urgently needed. Utility Model Content

[0004] The purpose of this invention is to address the problems of inconvenient maintenance, low drainage efficiency, and lack of anti-backflow design in traditional drainage devices in the background art by proposing an overhead pipeline drainage joint.

[0005] The technical solution of this utility model is as follows: an overhead pipeline drainage joint, including a main pipeline section, a drainage branch section, and a drainage terminal; the drainage branch section is composed of a first L-shaped branch pipe and a second L-shaped branch pipe, and the second L-shaped branch pipe is connected to the first L-shaped branch pipe.

[0006] Optionally, one end of the first L-shaped branch pipe is welded to the main pipe section to draw out the condensate in the main pipe section, and the other end of the first L-shaped branch pipe is connected to the drainage terminal, and the second L-shaped branch pipe is connected to the drainage terminal through the first L-shaped branch pipe to discharge the condensate.

[0007] Optionally, a first shut-off valve, a Y-type filter, a steam trap, and a check valve are sequentially installed on the flow channel of the first L-shaped branch pipe from one end of the main pipe section to the other end.

[0008] Optionally, a connecting pipe is provided between the first shut-off valve, the Y-type filter, the steam trap, and the check valve. The connecting pipe has integrally formed flanges at both ends, and the connecting pipe is sequentially connected to the first shut-off valve, the Y-type filter, the steam trap, and the check valve through the flanges.

[0009] Optionally, the check valve is installed on the first L-shaped branch pipe and located downstream of the drain valve to prevent drainage from flowing back into the main pipeline section.

[0010] Optionally, the steam trap is a float-type steam trap. When condensate accumulates in the steam trap to a preset level, the steam trap opens to drain the water. After the level drops to the set value, the steam trap closes to prevent steam leakage.

[0011] Optionally, a second shut-off valve is provided in the second L-shaped branch pipe corresponding to the flow direction of the first L-shaped branch pipe, and the second shut-off valve is located in the middle of the second L-shaped branch pipe.

[0012] Optionally, the second L-shaped branch pipe and the second shut-off valve form a backup drainage channel, and the second shut-off valve is used to open when the first L-shaped branch pipe is under maintenance or malfunctions.

[0013] Optionally, the pipe diameters of the first shut-off valve, Y-type filter, steam trap, and check valve are all adapted to the pipe diameter of the first L-shaped branch pipe to stabilize the condensate flow rate.

[0014] Optionally, the drainage terminal is made of stainless steel and is suitable for high-temperature, pressurized discharge of steam condensate.

[0015] In summary, this application includes at least one of the following beneficial technical effects: This utility model uses a matching drainage branch pipe section to quickly draw out condensate. Through welding and sealing connection, it achieves efficient adaptation between large-diameter main pipe and drainage branch. A stop valve, Y-type filter and drain valve and check valve are installed in sequence on the drainage branch pipe section to form a functional combination of "on / off control + quick cut-off + backflow prevention". Further, a multi-stage valve assembly consisting of a stop valve, a drain valve, a Y-type filter, and a check valve is installed, which can flexibly control the opening and closing of the drain branch as needed. During maintenance, the branch can be quickly cut off, reducing the difficulty and risk of high-altitude operations and improving the convenience of maintenance. Further, a check valve is installed to effectively prevent drainage from flowing back into the main pipeline section, avoid the turbulence of the medium in the pipeline caused by backflow, and ensure the stable operation of the main pipeline system. The Y-type filter ensures that the steam trap works normally and is prevented from being blocked by impurities. Furthermore, the condensate is discharged into a nearby sewer well to achieve centralized sewage discharge, which meets environmental protection requirements and avoids the safety hazards that may be caused by the random discharge of condensate in the elevated area. In summary, this utility model quickly draws out condensate from the main pipeline through the drainage branch pipe section. This not only promptly discharges accumulated liquid to avoid water hammer and ensures the safe operation of the overhead pipeline system, but also centrally discharges the condensate into nearby sewer wells, meeting environmental protection requirements and eliminating the safety hazards of indiscriminate drainage in overhead areas. On the other hand, the multi-stage shut-off valve not only allows for flexible control of the opening and closing of the drainage branch, but also enables quick disconnection of the branch during maintenance, reducing the difficulty and risk of high-altitude operations and improving maintenance convenience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first partial pipeline structure; Figure 2 This is a schematic diagram of the second local structure.

[0017] Attached reference numerals: 1. Main pipe section; 2. Drainage branch pipe section; 21. First L-shaped branch pipe; 22. Second L-shaped branch pipe; 3. Drainage terminal; 4. First shut-off valve; 5. Y-type filter; 6. Drainage valve; 7. Check valve; 8. Connecting pipe; 9. Second shut-off valve. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example

[0024] like Figures 1-2 The overhead pipeline drainage joint shown includes a main pipeline section 1, a drainage branch pipe section 2, and a drainage terminal 3; the drainage branch pipe section 2 is composed of a first L-shaped branch pipe 21 and a second L-shaped branch pipe 22, and the second L-shaped branch pipe 22 is connected to the first L-shaped branch pipe 21. One end of the first L-shaped branch pipe 21 is welded to the main pipe section 1 to drain condensate from the main pipe section 1. The other end of the first L-shaped branch pipe 21 is connected to the drainage terminal 3. The second L-shaped branch pipe 22 is connected to the drainage terminal 3 via the first L-shaped branch pipe 21 to discharge condensate. A first shut-off valve 4, a Y-type filter 5, a steam trap 6, and a check valve 7 are sequentially installed on the flow path of the first L-shaped branch pipe 21 near one end of the main pipe section 1. A connecting pipe 8 is installed between the first shut-off valve 4, the Y-type filter 5, the steam trap 6, and the check valve 7. The connecting pipe 8 has integrally formed flanges at both ends, and the connecting pipe 8 is sequentially connected to the first shut-off valve 4, the Y-type filter 5, the steam trap 6, and the check valve 7 via the flanges. The check valve 7 is installed on the first L-shaped branch pipe 21 and located at the first L-shaped branch pipe 21. Downstream, it is used to prevent drainage from flowing back into the main pipeline section 1; the steam trap 6 is a float-type steam trap. When the condensate in the steam trap 6 accumulates to a preset level, the steam trap 6 opens to drain, and closes after the level drops to the set value to block steam leakage; the second L-shaped branch pipe 22 is provided with a second shut-off valve 9 corresponding to the flow direction of the first L-shaped branch pipe 21. The second shut-off valve 9 is located in the middle of the second L-shaped branch pipe 22; the second L-shaped branch pipe 22 and the second shut-off valve 9 form a backup drainage channel. The second shut-off valve 9 is used to open when the first L-shaped branch pipe 21 is under maintenance or malfunctioning; the pipe diameters of the first shut-off valve 4, Y-type filter 5, steam trap 6, and check valve 7 are all adapted to the pipe diameter of the first L-shaped branch pipe 21 to stabilize the condensate flow rate; the drainage terminal 3 is made of stainless steel and is suitable for high-temperature and pressurized discharge conditions of steam condensate.

[0025] In this embodiment, after the steam or high-temperature gas fluid in the main pipeline section 1 forms condensate due to heat dissipation, the condensate is subjected to gravity and pressure inside the pipeline and enters the drainage branch through the welded joint between the first L-shaped branch pipe 21 and the main pipeline section 1.

[0026] The first shut-off valve 4 remains open under normal conditions. Condensate first enters the Y-type filter 5 through the first shut-off valve 4. The Y-type filter 5 traps impurities in the pipeline, preventing them from entering subsequent components and causing blockages, thus ensuring the stable operation of the steam trap 6. When steam in the main pipeline section 1 forms condensate and accumulates in the steam trap 6 to a certain extent, the filtered condensate triggers the steam trap 6 to open automatically for drainage. The float rises due to the buoyancy of the condensate, driving the valve core to open. When the condensate is discharged until the liquid level drops to the set value, the float falls and closes the valve core, thus achieving automatic condensate drainage and preventing steam leakage in the main pipeline, reducing energy consumption. Drainage is further controlled by check valve 7 located downstream of steam trap 6. The one-way conduction characteristic of check valve can effectively prevent backflow of water caused by downstream pressure fluctuations during drainage, and avoid the medium in the main pipeline from being disturbed and affecting the conveying efficiency. Under the action of pipeline pressure, condensate is conveyed to drainage terminal 3 after passing through check valve 7, and finally the condensate is discharged into the nearby sewer well, avoiding the safety hazards caused by random discharge in the overhead area.

[0027] When components on the first L-shaped branch pipe 21 require maintenance or malfunction, the first shut-off valve 4 is closed to cut off the main drainage channel, and then the second shut-off valve 9 in the middle of the second L-shaped branch pipe 22 is opened; condensate enters the second L-shaped branch pipe 22 through the diversion node of the first L-shaped branch pipe 21, and after being regulated by the second shut-off valve 9, it is discharged through the drainage terminal 3, ensuring that condensate does not accumulate in the main pipeline section 1, avoiding the risk of water hammer, and achieving continuous operation guarantee of "maintenance without stopping the machine"; when maintenance of the drainage branch is required, the connection between the drainage branch and the main pipeline can be quickly cut off by simply closing the first shut-off valve 4, without shutting down the main pipeline system, and the staff can safely carry out maintenance on the components of the first L-shaped branch pipe 21; by opening the end cap of the Y-type filter 5, the impurities trapped inside can be directly cleaned to complete the sewage discharge work, without the need to disassemble the filter as a whole, which greatly reduces the maintenance difficulty and safety risks of high-altitude operations.

[0028] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A drain joint for overhead pipelines, characterized in that, Includes the main pipeline section (1), the drainage branch pipe section (2), and the drainage terminal (3); The drainage branch pipe section (2) is composed of a first L-shaped branch pipe (21) and a second L-shaped branch pipe (22), and the second L-shaped branch pipe (22) is connected to the first L-shaped branch pipe (21).

2. The overhead pipeline drainage joint according to claim 1, characterized in that, One end of the first L-shaped branch pipe (21) is welded to the main pipe section (1) for drawing out the condensate in the main pipe section (1). The other end of the first L-shaped branch pipe (21) is connected to the drainage terminal (3), and the second L-shaped branch pipe (22) is connected to the drainage terminal (3) through the first L-shaped branch pipe (21) for discharging the condensate.

3. A drain joint for overhead pipelines according to claim 2, characterized in that, On the flow path from one end of the first L-shaped branch pipe (21) to the other end of the main pipe section (1), a first shut-off valve (4), a Y-type filter (5), a drain valve (6) and a check valve (7) are sequentially installed.

4. A drain joint for overhead pipelines according to claim 3, characterized in that, A connecting pipe (8) is provided between the first shut-off valve (4), the Y-type filter (5), the steam trap (6) and the check valve (7). The connecting pipe (8) has integrally formed flanges at both ends, and the connecting pipe (8) is connected to the first shut-off valve (4), the Y-type filter (5), the steam trap (6) and the check valve (7) in sequence through the flanges.

5. A drain joint for overhead pipelines according to claim 3, characterized in that, The check valve (7) is installed on the first L-shaped branch pipe (21) and located downstream of the drain valve (6) to prevent drainage from flowing back into the main pipeline section (1).

6. A drain joint for overhead pipelines according to claim 3, characterized in that, The steam trap (6) is a float-type steam trap. When the condensate in the steam trap (6) accumulates to the preset liquid level, the steam trap (6) opens to drain water. After the liquid level drops to the set value, it closes to block steam leakage.

7. A drain joint for overhead pipelines according to claim 1, characterized in that, The second L-shaped branch pipe (22) is provided with a second shut-off valve (9) in the flow direction corresponding to the first L-shaped branch pipe (21), and the second shut-off valve (9) is located in the middle of the second L-shaped branch pipe (22).

8. A drain joint for overhead pipelines according to claim 7, characterized in that, The second L-shaped branch pipe (22) and the second shut-off valve (9) form a backup drainage channel. The second shut-off valve (9) is used to open when the first L-shaped branch pipe (21) is under maintenance or malfunctions.

9. A drain joint for overhead pipelines according to claim 4, characterized in that, The pipe diameters of the first shut-off valve (4), Y-type filter (5), steam trap (6), and check valve (7) are all adapted to the pipe diameter of the first L-shaped branch pipe (21) to stabilize the flow rate of condensate.

10. A drain joint for overhead pipelines according to claim 1, characterized in that, The drainage terminal (3) is made of stainless steel and is suitable for high-temperature and pressurized discharge of steam condensate.

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