Drainage device for gas transmission pipelines
Through the design of the inverted cone barrel and spiral air guide, the shortcomings of the drainage device of the gas transmission pipeline in the existing technology in separation efficiency and safety are solved, and efficient water-gas separation and safe gas transmission are achieved.
Patent Information
- Application Number
- CN202511026294.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-24
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2045-07-24
AI Technical Summary
The drainage devices of traditional gas transmission pipelines have deficiencies in separation efficiency and safety, especially in effectively handling fine water mist and suspended water droplets. They also have high energy consumption, frequent maintenance and the risk of gas leakage.
It adopts a combined structure of an inverted cone barrel and spiral air guide groove, uses centrifugal force to separate gas and liquid, and isolates air flow and water flow through the design of an annular piston plate and sealing ball to ensure the dryness and safety of gas.
It significantly improves the water-gas separation effect, reduces energy consumption, reduces maintenance requirements, ensures the stability and safety of gas transportation, and avoids gas leakage.
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Figure CN120521093B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of gas pipeline drainage, more particularly, it relates to a drainage device for gas pipeline. BACKGROUND
[0002] Water is often mixed in gas during transportation, which can cause problems such as pipeline corrosion, valve blockage and combustion efficiency reduction. Traditional drainage devices mostly rely on gravity settling or simple filtering structure, and the separation efficiency is limited, especially for fine mist and suspended water droplets. Long-term operation, water accumulation not only affects the stability of transportation, but also may cause equipment corrosion and gas leakage risk. Although the existing technology tries to improve the separation effect by mechanical interception or adsorption material, the structure is complex and the maintenance is frequent, which is difficult to adapt to the continuous processing needs of high flow rate and large flow rate gas.
[0003] Traditional drainage equipment generally has the defects of incomplete separation and high energy consumption. For example, the static separator relies on natural sedimentation and needs to retain gas for a long time to achieve partial liquid separation, which occupies a large space and has low efficiency. Although the dynamic centrifugal device can improve the separation speed, it needs to rely on external power drive, which increases the energy consumption and operation cost. In addition, the water discharge link and gas channel of most devices are not completely isolated, and gas is easily escaped during drainage, which has safety hazards. Although some improved designs introduce sealing valves, frequent opening and closing can cause wear and tear, leading to sealing failure, which is difficult to meet the dual requirements of efficient drainage and zero gas leakage, and thus the structure of the existing gas pipeline drainage device needs to be optimized. SUMMARY
[0004] In order to overcome the above technical problems, the present application provides a drainage device for gas pipeline.
[0005] The present application achieves the above-mentioned purposes through the following technical solutions:
[0006] A drainage device for gas pipeline, comprising a gas inlet pipe group, an outer sleeve and a gas disc outlet pipe group, the output end of the gas inlet pipe group and the input end of the outer sleeve are in communication with each other, the output end of the gas disc outlet pipe group and the output end of the outer sleeve are in communication with each other, and the bottom of the outer sleeve is provided with a one-way drainage control valve group;
[0007] The inside of the outer sleeve is fixedly provided with a transition bin in communication with the gas inlet pipe group, the bottom of the transition bin is provided with a separation mechanism, the separation mechanism comprises an inverted cone barrel, the inverted cone barrel is used for gas-liquid separation of the gas transported into the inside, the bottom of the separation mechanism is provided with a drainage mechanism, and the drainage mechanism is used for separately discharging water in the inside of the separation mechanism;
[0008] An airflow guide component is provided at the top of the inner part of the outer sleeve and penetrates into the separation mechanism and the transition chamber. The airflow guide component is used to transport the gas airflow after the water vapor is separated inside the separation mechanism to the inside of the gas pan outlet pipe group.
[0009] As a further optimization scheme of the present invention, the separation mechanism includes an inverted cone barrel sealed and rotatably connected to the bottom of the transition bin, the top of the inverted cone barrel is provided with a second slide rail that is compatible with the bottom of the transition bin, the inner wall of the inverted cone barrel is provided with a spiral air guide groove, and the inner wall of the inverted cone barrel is also spirally and evenly provided with several groups of arc-shaped guide plates.
[0010] As a further optimization solution of the present invention, the drainage mechanism includes a connecting ring arranged at the bottom of the outer side of the inverted cone barrel, and the bottom of the connecting ring is evenly provided with extrusion columns, and the bottom of the extrusion columns are all rolled and embedded with balls.
[0011] As a further optimization scheme of the present invention, a limiting ring plate is fastened to the bottom of the inner wall of the outer sleeve, and several groups of connecting rods are evenly arranged through the upper and lower ends of the limiting ring plate. The tops of the connecting rods are jointly supported by concave and convex rings, and the outer sides of the connecting rods above the limiting ring plate are all provided with reset springs, and the bottom of the ball and the top of the concave and convex rings fit together.
[0012] As a further optimization solution of the present invention, a plurality of groups of displacement sliders are evenly arranged on the outer side of the concave-convex ring, and a displacement groove that is compatible with the water collecting bucket is provided at the inner wall of the outer sleeve.
[0013] As a further optimization scheme of the present invention, the bottom of the connecting rod is commonly provided with an annular piston plate, the bottom of the inner wall of the outer sleeve is provided with a support seat body, the outer side of the top of the support seat body is provided with an annular piston cavity, the annular piston plate is nested inside the annular piston cavity, and the piston moves up and down inside the annular piston cavity.
[0014] As a further optimization scheme of the present invention, a water collecting bucket connected to the inverted cone barrel is provided in the middle of the top of the support seat body, and a first slide rail is provided on the top of the water collecting bucket, and a first slide groove adapted to the first slide rail is provided at the bottom of the inverted cone barrel.
[0015] As a further optimization scheme of the present invention, the interior of the top of the support seat body is provided with a central cavity that is interconnected with the water collecting bucket, and the interior of the support seat body is provided with several groups of installation cavities that are interconnected with the central cavity. A sealing spring is laterally arranged inside the installation cavity, and a sealing ball is provided at one end of the sealing spring close to the central cavity, and diversion holes that are interconnected are provided between the annular piston cavity and the installation cavity.
[0016] As a further optimization scheme of the present invention, a central air flow duct is provided in the middle of the top of the transition bin, which passes through the transition bin and extends to the inside of the inverted cone barrel. The bottom end of the central air flow duct is located at a higher height than the bottom end of the inverted cone barrel. The top of the central air flow duct extends to the top of the transition bin and is provided with an air flow guide bucket. The top of the outer side of the air flow guide bucket is sealed with the inner wall of the outer sleeve. The outer side of the central air flow duct is located inside the transition bin and is provided with an arc-shaped air flow guide plate fastened to the inner wall of the transition bin. The guide groove of the arc-shaped air flow guide plate is facing the output end of the gas inlet pipe group.
[0017] As a further optimization solution of the present invention, a water outlet hole communicating with the annular piston cavity is provided on the outer side of the support seat body, and the water outlet hole is communicated with the input end of the one-way drainage control valve group.
[0018] The beneficial effects of the present invention are:
[0019] 1. The gas transmission pipeline drainage device of the present invention significantly improves the separation effect of water and gas through its unique structural design and efficient separation mechanism. First, it adopts a combination of an inverted cone barrel and a spiral air guide groove. Through the spiral rotation of the airflow, centrifugal force is used to effectively separate and gather water on the inner wall, thereby achieving efficient water-gas separation. This design overcomes the shortcomings of traditional devices in separation efficiency and can effectively treat fine water mist and suspended water droplets, ensuring the dryness of the gas and reducing the risks of pipeline corrosion and valve blockage.
[0020] 2. The present invention innovatively achieves the isolation of air flow and water flow in the water discharge mechanism. The up and down movement of the annular piston plate not only promotes the effective collection and discharge of water, but also ensures that gas does not leak during drainage through the design of sealing balls and springs. This design avoids the gas escape problem caused by drainage in traditional equipment, improving overall safety and operational stability. In addition, the structural optimization of the device reduces energy consumption and maintenance requirements, making it more suitable for high-flow rate and large-volume gas treatment, providing a reliable solution for industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;
[0022] Figure 2 It is a three-dimensional structural cross-sectional view of the present invention;
[0023] Figure 3 This is an enlarged cross-sectional view of the internal structure of the outer sleeve in the present invention;
[0024] Figure 4 This is an enlarged cross-sectional view of the connection structure between the outer sleeve and the gas inlet pipe assembly in the present invention;
[0025] Figure 5 This is an enlarged cross-sectional view of the internal structure of the inverted cone barrel of the present invention;
[0026] Figure 6 It is an enlarged cross-sectional view of the connection structure between the inverted cone bucket and the drainage mechanism in the present invention;
[0027] Figure 7 yes Figure 6 A magnified schematic diagram of the structure at A;
[0028] Figure 8 This is an enlarged cross-sectional view of the connection structure between the airflow guide assembly and the transition chamber in the present invention;
[0029] Figure 9 This is an enlarged cross-sectional view of the internal structure of the support base in the present invention;
[0030] Figure 10 It is an enlarged schematic diagram of the structure of the connecting parts at the concave and convex rings in the present invention;
[0031] Figure 11 It is an enlarged cross-sectional view of the internal structure of the support seat of the present invention.
[0032] In the picture:
[0033] 100, gas inlet pipe assembly; 200, outer casing; 300, one-way drainage control valve assembly; 400, gas pan outlet pipe assembly; 500, air flow guide assembly; 600, drainage mechanism; 700, separation mechanism; 800, transition chamber;
[0034] 501, airflow guide scoop; 502, central airflow duct; 503, curved airflow guide plate;
[0035] 601. Support seat; 602. Water collecting bucket; 603. Displacement groove; 604. Connecting ring; 605. Extrusion column; 606. Diversion hole; 607. Annular piston cavity; 608. Annular piston plate; 609. Connecting rod; 610. Limiting ring plate; 611. Return spring; 612. Concave and convex ring; 613. Ball; 614. First slide rail; 615. Sealing spring; 616. Sealing ball; 617. Mounting cavity; 618. Central cavity; 619. Water outlet; 620. Displacement slider.
[0036] 701, inverted cone barrel; 702, second slide rail; 703, arc-shaped guide plate; 704, spiral air guide groove; 705, first slide groove. DETAILED DESCRIPTION
[0037] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.
[0038] Example 1, as Figure 1 As shown, a drainage device for a gas transmission pipeline includes a gas inlet pipe assembly 100, an outer sleeve 200, and a gas pan outlet pipe assembly 400. The output end of the gas inlet pipe assembly 100 is connected to the input end of the outer sleeve 200, and the output end of the gas pan outlet pipe assembly 400 is connected to the output end of the outer sleeve 200. A one-way drainage control valve assembly 300 is provided at the bottom of the outer side of the outer sleeve 200.
[0039] like Figure 1 、 Figure 2 、 Figure 5 As shown, a transition chamber 800 that is interconnected with the gas inlet pipe group 100 is fixedly installed inside the outer sleeve 200, and a separation mechanism 700 is provided at the bottom of the transition chamber 800. The separation mechanism 700 includes an inverted cone barrel 701, which is used to separate the gas transported therein from gas and liquid. The separation mechanism 700 includes an inverted cone barrel 701 that is sealed and rotatably connected to the bottom of the transition chamber 800, and a second slide rail 702 that is adapted to the bottom of the transition chamber 800 is provided on the top of the inverted cone barrel 701. The inner wall of the inverted cone barrel 701 is provided with a spiral air guide groove 704, and the inner wall of the inverted cone barrel 701 is also spirally and evenly provided with a plurality of groups of arc-shaped guide plates 703.
[0040] like Figures 1 to 7 、 Figures 9 to 11 As shown, a drainage mechanism 600 is provided at the bottom of the separation mechanism 700, and the drainage mechanism 600 is used to separately drain the water inside the separation mechanism 700;
[0041] The drainage mechanism 600 includes a connecting ring 604 arranged at the bottom of the outer side of the inverted cone barrel 701, and extrusion columns 605 are evenly arranged at the bottom of the connecting ring 604. Balls 613 are rolled and embedded in the bottom of the extrusion columns 605. A limiting ring plate 610 is fastened to the bottom of the inner wall of the outer sleeve 200. Several groups of connecting rods 609 are evenly penetrated at the upper and lower ends of the limiting ring plate 610. The tops of the connecting rods 609 jointly support a concave and convex ring 612. The outer sides of the connecting rods 609 above the limiting ring plate 610 are all sleeved with return springs 611. The bottoms of the balls 613 are in contact with the tops of the concave and convex rings 612. Several groups of displacement sliders 620 are evenly arranged on the outer sides of the concave and convex rings 612. A displacement groove 603 that is compatible with the water collecting bucket 602 is provided at the inner wall of the outer sleeve 200.
[0042] like Figures 5 to 7 As shown, the bottom of the connecting rod 609 is commonly provided with an annular piston plate 608, the bottom of the inner wall of the outer sleeve 200 is provided with a support base 601, the outer side of the top of the support base 601 is provided with an annular piston cavity 607, the annular piston plate 608 is nested inside the annular piston cavity 607, and the piston moves up and down inside the annular piston cavity 607, the middle part of the top of the support base 601 is provided with a water collecting hopper 602 that is interconnected with the inverted cone barrel 701, and the top of the water collecting hopper 602 is provided with a first slide rail 614, and the bottom of the inverted cone barrel 701 is provided with a first slide groove 705 that is adapted to the first slide rail 614;
[0043] like Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 As shown, the top of the support base 601 is provided with a central cavity 618 that is interconnected with the water collecting hopper 602. The support base 601 is provided with a plurality of mounting cavities 617 that are interconnected with the central cavity 618. A sealing spring 615 is transversely arranged inside the mounting cavity 617. A sealing ball 616 is provided at one end of the sealing spring 615 near the central cavity 618. A guide hole 606 that is interconnected is provided between the annular piston cavity 607 and the mounting cavity 617.
[0044] like Figure 1 、 Figure 2 As shown, an airflow guide assembly 500 is provided at the top of the outer sleeve 200 and penetrates the interior of the separation mechanism 700 and the transition chamber 800. The airflow guide assembly 500 is used to transport the gas flow after the water vapor is separated in the separation mechanism 700 to the interior of the gas pan outlet pipe assembly 400.
[0045] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 8As shown, a central airflow duct 502 is provided in the middle of the top of the transition chamber 800, passing through the transition chamber 800 and extending into the interior of the inverted cone barrel 701. The bottom end of the central airflow duct 502 is located at a higher height than the bottom end of the inverted cone barrel 701. The top end of the central airflow duct 502 extends to the top of the transition chamber 800 and is provided with an airflow guide scoop 501. The top of the outer side of the airflow guide scoop 501 is sealed against the inner wall of the outer sleeve 200. The outer side of the central airflow duct 502, located inside the transition chamber 800, is provided with an arc-shaped airflow guide plate 503 fastened to the inner wall of the transition chamber 800. The guide groove of the arc-shaped airflow guide plate 503 is directly opposite the output end of the gas inlet pipe assembly 100.
[0046] like Figure 1 、 Figure 11 As shown, a water outlet hole 619 communicating with the annular piston cavity 607 is provided on the outer side of the support seat body 601 , and the water outlet hole 619 is communicated with the input end of the one-way drainage control valve group 300 .
[0047] The drainage device for a gas transmission pipeline proposed in this embodiment is used as follows: when the drainage device for a gas transmission pipeline is in use, the gas containing moisture is transported into the interior of the transition chamber 800 through the gas inlet pipe assembly 100. The curved airflow guide plate 503 then guides the gas obliquely downward toward the inner wall of the transition chamber 800. The gas then moves obliquely downward along the inner wall of the transition chamber 800 and further to the position of the inverted cone barrel 701.
[0048] When the gas flows to the inverted cone barrel 701, it is further guided by the spiral gas guide groove 704 on the inner wall of the inverted cone barrel 701, so that the gas flow continues to maintain a downward spiral rotation. The rotation of the gas flow drives the water contained in the gas flow to follow the displacement. The spiral structure design of the inverted cone barrel 701, due to the different weights of gas and water, combined with the centrifugal effect generated by the spiral rotation of the gas flow, makes the water adhere more closely to the inner wall of the inverted cone barrel 701, thus separating the gas and water.
[0049] The flow of gas pushes the arc-shaped guide plate 703 to drive the inverted cone bucket 701 to rotate as a whole. The water adhering to the inner wall of the inverted cone bucket 701 is guided by the spiral air guide groove 704, and then moves downward and is transported through the inverted cone bucket 701 to the inside of the water collection hopper 602.
[0050] The rotation of the inverted cone barrel 701 drives the connecting ring 604 on its outer side to rotate accordingly, thereby driving the extrusion column 605 to rotate accordingly. The rotation of the extrusion column 605 squeezes the concave-convex ring 612 at its bottom to move downward. The downward displacement of the concave-convex ring 612 drives the annular piston plate 608 at the bottom of the connecting rod 609 to move downward accordingly, thereby causing the annular piston plate 608 to move downward inside the annular piston cavity 607.
[0051] When the extrusion column 605 drives the ball 613 to move to the raised position on the top of the concave-convex ring 612, the concave-convex ring 612 is driven to move upward as a whole by the rebound force of the return spring 611, thereby driving the annular piston plate 608 to move upward inside the annular piston cavity 607.
[0052] This further realizes the up and down piston displacement function of the annular piston plate 608;
[0053] The water inside the gas is collected by the water collecting hopper 602 and directed to the interior of the central cavity 618 for collection;
[0054] When the annular piston plate 608 moves upward, the annular piston plate 608 sucks the airflow inside the annular piston cavity 607, causing the air pressure inside the annular piston cavity 607 to decrease. This in turn causes the air pressure inside the central cavity 618 to be greater than the air pressure inside the annular piston cavity 607. The pressure difference squeezes the water flow inside the central cavity 618 into the interior of the annular piston cavity 607.
[0055] At this time, the sealing ball 616 inside the installation cavity 617 is squeezed, and the sealing spring 615 is compressed. It is particularly noted that the water flow inside the central cavity 618 is extracted through the annular piston plate 608, and a residual water flow is maintained inside the central cavity 618 each time. The retained water flow then forms a barrier, isolating the gas flow inside the inverted cone barrel 701 at all times within the inverted cone barrel 701.
[0056] When the annular piston plate 608 moves downward, the sealing spring 615 rebounds and drives the sealing ball 616 to block the passage of the central cavity 618, thereby allowing water to flow through the water outlet 619 to the position of the one-way drainage control valve assembly 300 for discharge, thereby achieving the function of draining the water inside the gas.
[0057] The rotation of the gas inside the inverted cone barrel 701 reduces the pressure in the middle of the inverted cone barrel 701. The gas is blocked by the central airflow duct 502 and can only enter the central airflow duct 502 from the bottom. The gas, after separation of water vapor, is then guided by the central airflow duct 502 and discharged from the gas pan outlet pipe assembly 400.
[0058] The flow of gas drives the rotation of the inverted cone barrel 701, thereby realizing the separation function of water in the gas. Moreover, through the rotation of the inverted cone barrel 701, further linkage is achieved to realize the independent discharge of the separated water, realizing the directional discharge of water and gas, and avoiding the leakage of gas in the existing structure.
[0059] The above describes the specific implementation methods of the embodiments of the present invention, but the embodiments of the present invention are not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of the embodiments of the present invention, all of which are protected by the embodiments of the present invention.
Claims
1. A drainage device for a gas transmission pipeline, characterized in that: The gas inlet pipe assembly (100), an outer sleeve (200) and a gas pan outlet pipe assembly (400) are provided, wherein the output end of the gas inlet pipe assembly (100) is connected to the input end of the outer sleeve (200), the output end of the gas pan outlet pipe assembly (400) is connected to the output end of the outer sleeve (200), and a one-way drainage control valve assembly (300) is provided at the bottom of the outer side of the outer sleeve (200); A transition chamber (800) in communication with the gas inlet pipe group (100) is fixedly installed inside the outer sleeve (200), and a separation mechanism (700) is provided at the bottom of the transition chamber (800), and the separation mechanism (700) includes an inverted cone barrel (701), and the inverted cone barrel (701) is used for gas-liquid separation of the gas transported therein, and the separation mechanism (700) includes an inverted cone barrel (701) that is sealingly and rotatably connected to the bottom of the transition chamber (800), and a second slide rail (702) that is mutually adapted to the bottom of the transition chamber (800) is provided at the top of the inverted cone barrel (701), and a spiral air guide groove (704) is provided on the inner wall of the inverted cone barrel (701), and a plurality of groups of arc-shaped guide plates (703) are also spirally and evenly provided on the inner wall of the inverted cone barrel (701); The bottom of the separation mechanism (700) is provided with a drainage mechanism (600), and the drainage mechanism (600) is used to separately drain the water inside the separation mechanism (700). The drainage mechanism (600) includes a connecting ring (604) provided at the bottom of the outer side of the inverted cone barrel (701), and the bottom of the connecting ring (604) is evenly provided with extrusion columns (605). The bottoms of the extrusion columns (605) are all rolled and embedded with balls (613). The bottom of the inner wall of the outer sleeve (200) is fastened with a limiting ring plate (610), and the limiting ring plate (610) is fixedly installed. 0) are uniformly provided with a plurality of connecting rods (609) at both ends, the tops of the connecting rods (609) are jointly supported by a concave-convex ring (612), the outer sides of the connecting rods (609) located above the limiting ring plate (610) are sleeved with a return spring (611), the bottom of the ball (613) and the top of the concave-convex ring (612) are in contact with each other, the outer side of the concave-convex ring (612) is uniformly provided with a plurality of displacement sliders (620), and the inner wall of the outer sleeve (200) is provided with a displacement groove (603) that is adapted to the water collecting bucket (602); The bottom of the connecting rod (609) is commonly provided with an annular piston plate (608), the bottom of the inner wall of the outer sleeve (200) is provided with a support seat (601), the outer side of the top of the support seat (601) is provided with an annular piston cavity (607), the annular piston plate (608) is nested inside the annular piston cavity (607), and the piston moves up and down inside the annular piston cavity (607), the middle part of the top of the support seat (601) is provided with a water collecting bucket (602) that is interconnected with the inverted cone barrel (701), and the top of the water collecting bucket (602) is provided with a first slide rail (614), and the bottom of the inverted cone barrel (701) is provided with a A first slide groove (705) is provided which is adapted to the first slide rail (614); a central cavity (618) which is interconnected with the water collecting bucket (602) is provided inside the top of the support seat (601); a plurality of mounting cavities (617) which are interconnected with the central cavity (618) are provided inside the support seat (601); a sealing spring (615) is provided laterally inside the mounting cavity (617); a sealing ball (616) is provided at one end of the sealing spring (615) which is close to the central cavity (618); and a flow guide hole (606) which is interconnected is provided between the annular piston cavity (607) and the mounting cavity (617); An airflow guide assembly (500) is provided at the top of the inner portion of the outer sleeve (200) and penetrates the interior of the separation mechanism (700) and the transition chamber (800). The airflow guide assembly (500) is used to transport the gas airflow after the water vapor is separated in the separation mechanism (700) to the interior of the gas pan outlet pipe assembly (400).
2. A drainage device for a gas transmission pipeline according to claim 1, characterized in that: A central airflow duct (502) is provided at the middle of the top of the transition bin (800) and extends through the transition bin (800) and to the inside of the inverted cone barrel (701). The bottom end of the central airflow duct (502) is located at a height higher than the bottom end of the inverted cone barrel (701). The top end of the central airflow duct (502) extends to the top of the transition bin (800) and is provided with an airflow guide bucket (501). The top of the outer side of the airflow guide bucket (501) is sealed and fitted with the inner wall of the outer sleeve (200). The outer side of the central airflow duct (502) located inside the transition bin (800) is provided with an arc-shaped airflow guide plate (503) fastened to the inner wall of the transition bin (800). The guide groove of the arc-shaped airflow guide plate (503) is directly opposite to the output end position of the gas inlet pipe group (100).
3. A drainage device for a gas transmission pipeline according to claim 1, characterized in that: The outer side of the support seat (601) is provided with a water outlet hole (619) which is in communication with the annular piston cavity (607), and the water outlet hole (619) is in communication with the input end of the one-way drainage control valve group (300).
Citation Information
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