A sealing leakage drainage device for the expansion joint of a tubular turbine

Abstract

The present invention relates to the technical field of hydraulic turbines, and particularly relates to a sealing leakage and drainage device for a bulb turbine expansion joint, which includes a runner chamber, a foundation ring and an expansion joint. The expansion joint is installed at the lower end of the foundation ring, and a triangular groove is formed between the foundation ring and the expansion joint. The runner chamber is arranged on one side of the foundation ring, and the runner chamber and the foundation ring are fixedly connected to each other. Drainage grooves are respectively opened in the axial and radial directions at both ends of the position below the triangular groove of the expansion joint, and a drainage hole is opened in the vertical direction at the end of each drainage groove. A right-angle bellows elbow is arranged on one side of the expansion joint. One end of the right-angle bellows elbow is screwed to the expansion joint, and a rubber hose is installed at the other end of the right-angle bellows elbow. Compared with the existing device, the structure of the present invention is very simple, only requiring a stainless steel right-angle bellows elbow, saving materials, time and cost, and being very convenient for installation and maintenance, with very good practical effects.

Description

Technical Field

[0001] The present invention relates to the technical field of water turbines, and particularly to a sealing leakage and drainage device for a bulb turbine expansion joint. Background Art

[0002] At present, even after multiple optimizations and improvements, the sealing form at the expansion joint of the bulb turbine still has the problem of water leakage from the water flow in the flow channel to the plant inside the flow channel outside. The existing solution to the water leakage of the expansion joint seal is to adopt an open large-area water collection device. Its technical solution is to use three channel steels and a thin steel plate welded together into a water collection trough shape around the lower half circle of the expansion joint, and use a sufficient number of bolts to couple this water collection trough with the flange that has been welded on-site to the lower half circle of the foundation ring. By opening a drainage hole at the bottom of the water collection trough and connecting a rubber hose to drain the leaked water to the drainage pipeline system of the power station (as shown in the attached Figure 4 And Figure 5 the instructions).

[0003] This existing device has problems such as large consumption of materials, a large amount of welding, and the need to spray anti-rust paint. The installation range has a large span, and later disassembly, installation, and maintenance are very inconvenient.

[0004] Therefore, a sealing leakage and drainage device for a bulb turbine expansion joint that can solve the above problems is needed. Summary of the Invention

[0005] In order to solve the corona problem existing in the high-voltage generator in the current existing technical solutions, the present invention provides a sealing leakage and drainage device for a bulb turbine expansion joint. Compared with the existing device, the structure of the present invention is very simple, only requiring a stainless steel right-angle bellows elbow, saving materials, time, and cost. Installation and maintenance are very convenient, and it has very good practical effects.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a sealing leakage and drainage device for a bulb turbine expansion joint, including a runner chamber, a foundation ring, and an expansion joint. The expansion joint is installed on the outer circular side of the foundation ring. A triangular groove is formed between the foundation ring and the expansion joint. The runner chamber is arranged on one side of the foundation ring, and the runner chamber and the foundation ring are slidably connected to each other. Drainage grooves are respectively opened in the axial and radial directions on both sides below the triangular groove of the expansion joint, and a drainage hole is opened in the vertical direction at the end of each drainage groove. A right-angle bellows elbow is arranged on one side of the expansion joint. One end of the right-angle bellows elbow is screwed to the expansion joint, and a rubber hose is installed at the other end of the right-angle bellows elbow. The rubber hose and the right-angle bellows elbow are fastened to each other by a hose clamp.

[0007] Further, the runner chamber is located on one side of the expansion joint, and the runner chamber and the expansion joint are coupled by bolts.

[0008] Further, a pipe thread hole is provided in the lower part of the expansion joint. One end of the pipe thread hole is communicated with the drain hole arranged axially and radially, and the other end of the pipe thread hole is threadedly connected with the right-angle bellows elbow.

[0009] Further, a groove is provided on the expansion joint, and a dust-proof ring is sleeved in the groove.

[0010] Further, the depth of the drain groove is 1 mm and the width is 6 mm.

[0011] Further, a sealing strip is sleeved in the triangular groove.

[0012] The advantages of the present invention are as follows: The present invention provides a sealing leakage and drainage device for a tubular turbine expansion joint, which includes a runner chamber, a foundation ring and an expansion joint. The expansion joint is installed on the outer circle of the foundation ring. A triangular groove is formed between the foundation ring and the expansion joint. Drain grooves are respectively provided in the axial and radial directions on both sides of the position below the triangular groove of the expansion joint. A drain hole is provided in the vertical direction at the end of each drain groove. A right-angle bellows elbow is arranged on one side of the expansion joint, and a rubber hose is installed at the other end of the right-angle bellows elbow. Compared with the existing device, the structure of the present invention is very simple, only requiring a stainless steel right-angle bellows elbow, saving materials, time and cost. The installation and maintenance are very convenient, and it has very good practical effects. Description of the Drawings

[0013] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic installation structure diagram of the present invention.

[0015] Figure 2 It is a partial axonometric view of the expansion joint structure in the present invention.

[0016] Figure 3 It is a schematic cross-sectional view of the expansion joint structure in the present invention.

[0017] Figure 4 It is a schematic structure diagram of the expansion joint sealing leakage and drainage device in the existing device.

[0018] Figure 5 It is an axonometric view of the expansion joint sealing leakage and drainage device in the existing device.

[0019] Wherein:

[0020] 1. Base ring; 2. Expansion joint; 3. Runner chamber;

[0021] 4. Sealing strip; 5. Dust-proof ring; 6. Right-angled bellows elbow;

[0022] 7. Hose clamp; 8. Rubber hose; 11. Triangular groove;

[0023] 12. Drainage groove; 13. Drainage hole; 14. Pipe thread hole;

[0024] 15. Existing device Detailed implementation manners

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention 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 thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1:

[0028] Figure 1 is the installation structure schematic diagram of the present invention, Figure 2 is the axonometric partial schematic diagram of the expansion joint structure in the present invention, Figure 3 is the sectional schematic diagram of the expansion joint structure in the present invention, as Figure 1 , Figure 2 And Figure 3A sealing leakage and drainage device for a bulb turbine expansion joint, comprising a runner chamber 3, a foundation ring 1 and an expansion joint 2. The expansion joint 2 is installed on the outer circle of the foundation ring 1. A triangular groove 11 is formed between the foundation ring 1 and the expansion joint 2. The runner chamber 3 is arranged on one side of the foundation ring 1, and the runner chamber 3 and the foundation ring 1 are slidably connected to each other. On both sides of the position below the triangular groove 11 of the expansion joint 2 in the axial and radial directions, drainage grooves 12 are respectively opened. At the end of each drainage groove 12 in the vertical direction, a drainage hole 13 is opened. On one side of the expansion joint 2, a right-angle bellows elbow 6 is provided. One end of the right-angle bellows elbow 6 is threadedly connected to the expansion joint 2. A rubber hose 8 is installed at the other end of the right-angle bellows elbow 6, and the rubber hose 8 and the right-angle bellows elbow 6 are fastened to each other by a hose clamp 7. The runner chamber 3 is located on one side of the expansion joint 2, and the runner chamber 3 and the expansion joint 2 are bolted together. A pipe thread hole 14 is opened inside the expansion joint 2. One end of the pipe thread hole 14 is communicated with the drainage holes 13 arranged axially and radially, and the other end of the pipe thread hole 14 is threadedly connected to the right-angle bellows elbow 6. A dust-proof ring 5 is sleeved in a groove opened on the expansion joint 2. The depth of the drainage groove 12 is 1 mm, and the width is 6 mm. A sealing strip 4 is sleeved in the triangular groove 11.

[0029] Working principle: The present invention can concentrate and guide the water flow leaking from the sealing strip 4 of the expansion joint 2 to a drainage point inside the expansion joint 2, and discharge it to the drainage pipeline system of the power station through the drainage holes 13 on the expansion joint 2. The specific solution is as follows: On both sides of the lowest position of the triangular groove 11 of the expansion joint 2, a drainage groove 12 with a depth of 1 mm and a width of 6 mm is opened in the axial and radial directions respectively, and a drainage hole 13 is drilled in the vertical direction at the end of each drainage groove 12. The axial drainage hole 13 penetrates through the expansion joint 2 to the downstream end face of the expansion joint 2, and an internal thread hole is tapped on this end face according to the external thread of the stainless steel right-angle bellows elbow 6 (one end with external thread and the other end with a bellows shape). One end of the bellows elbow 6 (with external thread, and raw tape can be wound) is screwed into the pipe thread hole 14 at the lowest position of the expansion joint 2. The rubber hose 8 is sleeved on the other end (bellows shape) of the bellows elbow and fastened by the hose clamp 7. The rubber hose 8 is connected to the drainage pipeline system provided by the power station.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing leakage drainage device for the expansion joint of a tubular turbine, comprising a runner chamber (3), a foundation ring (1) and an expansion joint (2). It is characterized in that: The expansion joint (2) is installed on the outer circle of the foundation ring (1). A triangular groove (11) is formed between the foundation ring (1) and the expansion joint (2). The runner chamber (3) is arranged on one side of the foundation ring (1). The runner chamber (3) and the foundation ring (1) are slidably connected to each other. Drainage grooves (12) are respectively opened in the axial and radial directions on both sides at the lower position of the triangular groove (11) of the expansion joint (2). A drainage hole (13) is opened in the vertical direction at the end of each drainage groove (12). A right-angle bellows elbow (6) is arranged on one side of the expansion joint (2). One end of the right-angle bellows elbow (6) is screwed to the expansion joint (2). A rubber hose (8) is installed at the other end of the right-angle bellows elbow (6). The rubber hose (8) and the right-angle bellows elbow (6) are fastened to each other by a hose clamp (7). The runner chamber (3) is located on one side of the expansion joint (2). The runner chamber (3) and the expansion joint (2) are bolted together. A groove is formed in the expansion joint (2), and a dust-proof ring (5) is sleeved in the groove.

2. The sealing leakage drainage device for the expansion joint of a tubular turbine according to claim 1, It is characterized in that: A pipe thread hole (14) is opened in the lower part of the expansion joint (2). One end of the pipe thread hole (14) is communicated with the drainage holes (13) arranged axially and radially. The other end of the pipe thread hole (14) is threadedly connected to the right-angle bellows elbow (6).

3. The sealing leakage drainage device for the expansion joint of a tubular turbine according to claim 1, It is characterized in that: The depth of the drainage groove (12) is 1 mm and the width is 6 mm.

4. The sealing leakage drainage device for the expansion joint of a tubular turbine according to claim 1, It is characterized in that: A sealing strip (4) is sleeved in the triangular groove (11).

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