Leak-proof device provided with labyrinth seal pressure regulating valve core and used for gas drainer

Abstract

The utility model discloses an anti-leakage device provided with a labyrinth seal pressure regulating valve element and used for a gas drainer. The anti-leakage device comprises a barrel, a water inlet pipe, a water outlet pipe, a valve seat, a fixing plate, a floating barrel and a centralizing block. The pressure regulating valve is characterized in that a labyrinth seal pressure regulating valve core matched with the valve seat is arranged at the lower end of the buoy; the labyrinth seal pressure regulating valve element is composed of a sealing plate, a connecting rod, a sealing table, a U-shaped support, a conical column and a screw, an annular groove is formed in a bottom panel of the sealing table, the large head end of the conical column is fixedly connected with the portion, on the inner side of the annular groove, of the bottom panel of the sealing table, the small head end of the conical column is fixedly provided with the U-shaped support through the screw, a center hole is formed in the middle of the sealing plate, and the connecting rod is arranged in the center hole. The central hole of the sealing plate is sleeved on the outer side of the conical column; and a conical protruding ring is fixedly arranged on the upper panel of the sealing plate at the central hole. The sealing and self-locking valve element is installed on a gas drainer for use, the labyrinth flow channel is arranged between the sealing plate and the sealing table of the valve element, and the sealing and self-locking effects are improved.

Description

Technical Field

[0001] This utility model relates to an improvement of a leak-proof device for a gas drainer, specifically a leak-proof device for a gas drainer equipped with a labyrinth seal pressure regulating valve core. Background Technology

[0002] Currently, the leak-proof gas drainers used by enterprises are generally multi-chamber vertical gas drainers, such as the utility model patent "Gas Drainer with Leak-proof Device in Drainage End Chamber" applied for by Jinan Laiwu Xinchuang Machinery Equipment Co., Ltd. on September 8, 2020, with patent number CN202021941159.0, which has a leak-proof device in the drainage end chamber; such matching leak-proof devices have various structures, and the leak-proof effect varies. Leakage prevention devices without self-locking function have poor leakage prevention capabilities. Some sealing devices with self-locking function also have pressure regulating mechanisms, but the sealing effect of the pressure regulating mechanism is not ideal, especially under continuous high pressure. When automatically resealing after intermittent drainage under high pressure, there is still some leakage. For example, Guo Xiangyong's Chinese utility model patent application "Drainage stop valve for gas drainage facilities" (patent number CN200920021655.1) submitted on April 29, 2009; the sealing valve plate has a pressure regulating valve core, which widens the pressure range for automatic drainage function recovery, but the sealing effect is not ideal. It cannot effectively achieve and maintain the final self-locking function, nor can it automatically achieve the sealing function multiple times. When the gas pressure is high, the sealing device will still have a small amount of gas leakage, which means that the safety hazards in gas production and transportation cannot be completely resolved. Summary of the Invention

[0003] The purpose of this utility model is to provide a leak-proof device for gas drainers with a labyrinth seal pressure regulating valve core, which is suitable for installation and use in gas drainers. The device has a labyrinth flow channel between the sealing plate and the sealing platform of the valve core to form a flexible seal, thereby improving the sealing and self-locking effect.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The gas drainer uses a leak-proof device with a labyrinth seal pressure regulating valve core, comprising a cylinder, an inlet pipe, an outlet pipe, a valve seat, a fixing plate, a float, and a centralizing block. The inlet pipe is fixedly installed on the upper side wall of the cylinder, the upper port of the cylinder is sealed with a sealing plate, and the outlet pipe is fixedly connected to the lower port of the cylinder. A float is installed inside the cylinder cavity, and a centralizing block is fixedly installed on the side wall of the float. A valve seat is fixedly installed at the bottom of the side wall inside the cylinder cavity via a fixing plate. The central axis of the valve seat coincides with the central axis of the cylinder, and the drain hole of the valve seat is connected to the inner cavity of the cylinder and the inner cavity of the outlet pipe, respectively. The feature is that a labyrinth seal pressure regulating valve core adapted to the valve seat is fixedly installed at the lower end of the float. The labyrinth seal pressure regulating valve core consists of a sealing plate, a connecting rod, a sealing platform, and a "U"-shaped... The device consists of a U-shaped bracket, a conical column, and screws. A sealing platform is fixed to the lower end of the connecting rod, and the upper end of the connecting rod is connected and fixed to the lower end of the float. An annular groove is provided on the bottom panel of the sealing platform. The large end of the conical column is connected and fixed to the bottom panel of the sealing platform inside the annular groove. A U-shaped bracket is fixed to the small end of the conical column by screws. A central hole is provided in the middle of the sealing plate, which is fitted onto the outside of the conical column. The sealing plate is located between the sealing platform and the U-shaped bracket. A conical protrusion ring is fixed to the top panel of the sealing plate located at the central hole. A silicone layer is applied to the outer walls of the sealing plate and the conical protrusion ring, as well as the inner wall of the central hole. The inner diameter of the annular groove is the same as the diameter of the large end of the conical column. The diameter of the central hole matches the inner diameter of the annular groove. The outer diameter of the lower end of the conical protrusion ring matches the outer diameter of the annular groove.

[0005] The central axes of the float, connecting rod, sealing platform, conical column, and valve seat coincide.

[0006] The beneficial effects of this utility model are as follows: when installed on a gas drainer, a labyrinth flow channel is provided between the sealing plate and the sealing platform of the valve core, forming a flexible seal, which improves the sealing and self-locking effect, and extends the service life of the valve core. Attached Figure Description

[0007] Figure 1 This is a partial cross-sectional view of the structure of this utility model;

[0008] Figure 2 This is a front enlarged schematic diagram of the structure of the labyrinth seal pressure regulating valve core of this utility model;

[0009] Figure 3 This is an enlarged cross-sectional view of the labyrinth seal pressure regulating valve core of this utility model in the valve seat open state;

[0010] Figure 4 This is an enlarged cross-sectional view of the labyrinth seal pressure regulating valve core of this utility model in the valve seat closed state;

[0011] Figure 5 This is a top-view enlarged schematic diagram of the sealing plate structure of this utility model;

[0012] Figure 6 This is an enlarged cross-sectional view of the sealing platform and conical column of this utility model;

[0013] Figure 7 This utility model is based on Figure 5 Enlarged cross-sectional view of the structure along the A-A direction.

[0014] In the diagram: 1. Cylinder; 2. Inlet pipe; 3. Outlet pipe; 4. Valve seat; 5. Labyrinth seal pressure regulating valve core; 51. Sealing plate; 511. Conical protrusion ring; 512. Silicone layer; 52. Connecting rod; 53. Sealing platform; 54. "U" shaped bracket; 55. Conical column; 56. Screw; 57. Ring groove; 58. Center hole; 6. Float; 7. Central block; 8. Fixing plate. Detailed Implementation

[0015] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 This utility model is created.

[0016] This gas drainer uses a leak-proof device with a labyrinth seal pressure regulating valve core, including a cylinder 1, an inlet pipe 2, an outlet pipe 3, a valve seat 4, a fixing plate 8, a float 6, and a centralizing block 7. The inlet pipe 2 is fixedly installed on the upper side wall of the cylinder 1. The upper port of the cylinder 1 is sealed with a sealing plate, and the outlet pipe 3 is fixedly connected to the lower port of the cylinder 1. The float 6 is installed inside the cavity of the cylinder 1, and a centralizing block 7 is fixedly installed on the side wall of the float 6 to position the float 6 at the central axis of the inner cavity of the cylinder 1. A valve seat 4 is sealed and fixedly mounted on the bottom of the inner side wall by a fixing plate 8. The central axis of the valve seat 4 coincides with the central axis of the cylinder 1. The drain hole of the valve seat 4 is connected to the inner cavity of the cylinder 1 and the inner cavity of the outlet pipe 3, respectively. The float 6 is characterized by having a labyrinth seal pressure regulating valve core 5 adapted to the valve seat 4 fixedly mounted at its lower end. The labyrinth seal pressure regulating valve core 5 is composed of a sealing plate 51, a connecting rod 52, a sealing platform 53, a "U"-shaped bracket 54, a conical column 55, and a screw 56. A sealing platform 53 is fixedly provided at the lower end of the connecting rod 52. The upper end of the connecting rod 52 is connected and fixedly connected to the lower end of the float 6. An annular groove 57 is provided on the bottom plate of the sealing platform 53. The large end of the conical column 55 is connected and fixedly connected to the bottom plate of the sealing platform 53 on the inner side of the annular groove 57. A "U"-shaped bracket 54 is fixedly provided on the small end of the conical column 55 by screws 56. A central hole 58 is provided in the middle of the sealing plate 51. The central hole 58 of the sealing plate 51 is sleeved on the outside of the conical column 55. The sealing plate 51 is located between the sealing platform 53 and the "U"-shaped bracket 54. Between the "-shaped brackets 54, a conical protrusion ring 511 is fixedly provided on the upper plate of the sealing plate 51 located at the central hole 58. A silicone layer 512 is provided on the outer wall of the sealing plate 51 and the conical protrusion ring 511, and on the inner wall of the central hole 58. The inner diameter of the ring groove 57 is the same as the diameter of the large end of the conical column 55. The diameter of the central hole 58 is adapted to the inner diameter of the ring groove 57. The outer diameter of the lower end of the conical protrusion ring 511 is adapted to the outer diameter of the ring groove 57.

[0017] The central axes of the float 6, connecting rod 52, sealing platform 53, conical column 55 and valve seat 4 coincide.

[0018] After the present invention is installed in the drain chamber of the gas drainer, condensate enters the cylinder 1 cavity from the inlet pipe 2, flows into the outlet pipe 3 from the drain hole of the valve seat 4, and then flows into the drain chamber. When the gas pressure increases, the water level in the cylinder 1 cavity decreases, the float 6 descends, and the labyrinth seal pressure regulating valve core 5 descends accordingly. The bottom panel of the sealing plate 51 first seals the edge of the valve seat 4. Due to the elasticity of the silicone layer 512, a flexible seal is formed between the bottom panel of the sealing plate 51 and the valve seat 4. At this time, the sealing plate 51 is still suspended. Hanging on the "U"-shaped bracket 54, there is still a gap between the central hole 58 of the sealing plate 51 and the outer wall of the conical column 55. The condensate in the cylinder 1 cavity can still enter the outlet pipe 3 cavity through this gap. The float 6 will continue to descend until the annular groove 57 of the sealing platform 53 completely covers the conical protrusion ring 511. Due to the elasticity of the silicone layer 512 on the outside of the conical protrusion ring 511, the seal between the annular groove 57 and the conical protrusion ring 511 will be tighter, and the water seal effect will be better. At this time, the state of the labyrinth seal pressure regulating valve core 5 is as follows: Figure 4 As shown; when the gas pressure decreases, condensate enters the cylinder 1 cavity from the inlet pipe 2, causing the water level in the cylinder 1 cavity to rise, thereby causing the float 6 to rise, which in turn drives the sealing platform 53 and the conical column 55 to rise, causing the annular groove 57 to first disengage from the conical protrusion ring 511. The condensate in the cylinder 1 cavity flows into the outlet pipe 3 cavity from the gap between the central hole 58 of the sealing plate 51 and the outer wall of the conical column 55, reducing the sealing pressure between the bottom plate of the sealing plate 51 and the valve seat 4. As the float 6 continues to rise, the sealing plate 51 is lifted by the "U"-shaped bracket 54, thereby opening the drain hole of the valve seat 4, and the condensate enters the drain end chamber, achieving the drainage requirements.

Claims

1. A leak-proof device for a gas drainer with a labyrinth seal pressure regulating valve core, comprising a cylinder (1), an inlet pipe (2), an outlet pipe (3), a valve seat (4), a fixing plate (8), a float (6), and a straightening block (7), wherein the inlet pipe (2) is fixedly installed on the upper side wall of the cylinder (1), the upper port of the cylinder (1) is sealed with a sealing plate, the lower port of the cylinder (1) is fixedly connected to the outlet pipe (3), the float (6) is installed inside the cavity of the cylinder (1), the straightening block (7) is fixedly installed on the side wall of the float (6), the valve seat (4) is sealed and fixedly installed at the bottom of the side wall inside the cavity of the cylinder (1) by the fixing plate (8), the central axis of the valve seat (4) coincides with the central axis of the cylinder (1), and the drain hole of the valve seat (4) is connected to the inner cavity of the cylinder (1) and the inner cavity of the outlet pipe (3) respectively; characterized in that: The lower end of the float (6) is fixedly provided with a labyrinth seal pressure regulating valve core (5) that is compatible with the valve seat (4); the labyrinth seal pressure regulating valve core (5) is composed of a sealing plate (51), a connecting rod (52), a sealing platform (53), a "U"-shaped bracket (54), a conical column (55) and screws (56). The lower end of the connecting rod (52) is fixedly provided with a sealing platform (53), and the upper end of the connecting rod (52) is connected and fixed to the lower end of the float (6). The bottom plate of the sealing platform (53) is provided with an annular groove (57). The large end of the conical column (55) is connected and fixed to the bottom plate of the sealing platform (53) inside the annular groove (57). The small end of the conical column (55) is fixedly provided with a "U"-shaped bracket (54) by screws (56). The sealing plate (51) A central hole (58) is provided in the middle. The central hole (58) of the sealing plate (51) is sleeved on the outside of the conical column (55). The sealing plate (51) is located between the sealing platform (53) and the "U"-shaped bracket (54). A conical protrusion ring (511) is fixed on the upper plate of the sealing plate (51) located at the central hole (58). A silicone layer (512) is covered on the outer wall of the sealing plate (51) and the conical protrusion ring (511), and the inner wall of the central hole (58). The inner diameter of the ring groove (57) is the same as the diameter of the large end of the conical column (55). The diameter of the central hole (58) is matched with the inner diameter of the ring groove (57). The outer diameter of the lower end of the conical protrusion ring (511) is matched with the outer diameter of the ring groove (57).

2. The anti-leakage device for a gas drainer according to claim 1, characterized in that: The central axes of the float (6), connecting rod (52), sealing platform (53), conical column (55) and valve seat (4) coincide.

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