Multifunctional flexible pipe air leakage measuring device

Abstract

The utility model discloses a multifunctional flexible pipe air leakage measuring device, comprising an outer layer structure which has a hollow structure and is provided with an opening at one side, a first winding pipe at the inner part and a front plate at the other side, and the surface of the front plate is provided with a first measuring hole and a second measuring hole; one end of the inner-layer structure is detachably arranged in the outer-layer structure, the inner-layer structure is provided with a second winding pipe and a flange, and the surface of the flange is further provided with a third measuring hole; and the end face mask is connected between the outer-layer structure and the inner-layer structure, leakage rate analysis of the winding pipe is carried out before the flexible pipe is produced, and corresponding plan compiling and analysis are carried out in advance under the condition that a subsequent corrugated pipe is damaged and cooling air leaks.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a multifunctional flexible pipe leakage measuring device. Background Art

[0002] With the continuous development of gas turbine technology, ultra-high thermal efficiency of gas turbines is the pursuit of new units. To improve the overall thermal efficiency of the gas turbine, the temperature before the turbine is also constantly increasing. The turbine blades are exposed to extremely high temperature environments. Currently, simply increasing the allowable temperature of the material is no longer able to meet actual use requirements. It is required that the turbine blades must adopt a new air film cooling method. The cooling air for the turbine blades generally comes from the compressor exhaust. As the cooling requirements become higher and higher, the exhaust volume demand is also increasing under the condition of a certain exhaust temperature, which inevitably leads to a decrease in the thermal efficiency of the gas turbine. Therefore, a method of extracting air from the compressor, cooling it externally, and then cooling the turbine rotor and blades has been widely used. This method not only improves cooling efficiency, but also avoids the impact of exhaust flow on the efficiency of the entire machine.

[0003] Existing solutions such as Figure 1 As shown in the figure, the combustion cylinder (a2) and the torque tube cover (a3) ​​are connected by the ribs (a31) on the torque tube cover. Air is drawn from the compressor exhaust chamber through the turbine cylinder (b1), cooled by the cooler (d1), and then transported through the combustion cylinder (a2) and the torque tube cover (a3) ​​through the flexible pipe (e) to the rotor cooling chamber for rotor cooling (c1).

[0004] In this solution, cooling air must pass through a double layer of cylinders: the combustion and compression cylinder (a2) and the torque tube cover (a3). These cylinders are located at the compressor outlet, and the flexible pipe (e) that carries the cooling air is exposed to a harsh operating environment. This cooling method inevitably faces the challenge of effectively directing the cooled compressor exhaust air into the rotor interior. These harsh operating conditions place extremely high demands on the flexible pipe (e).

[0005] Currently used flexible pipe solutions such as Figure 2 As shown in (Public Patent CN117189960A), a structure of inner and outer double-layer winding tubes + middle corrugated tube is adopted.

[0006] The inner and outer layers of the wound tubes prevent the influence of airflow excitation on the middle bellows, while the bellows meet the airtightness requirements of cooling air transmission.

[0007] Because the bellows are used inside gas turbines, they must be fully reliable throughout their overhaul cycles. Current domestic bellows usage suggests they are susceptible to damage during use due to factors such as initial cracks and fatigue. Any form of damage inevitably leads to cooling air leakage. This air leakage compromises rotor cooling and poses significant challenges to gas turbine operation. Utility Model Content

[0008] In order to solve the above technical problems, the utility model provides a multifunctional flexible tube leakage measuring device and a method of use, which can detect the leakage of the wound tube before the production of the flexible tube, and carry out corresponding emergency plan preparation and analysis in advance in the event that the subsequent corrugated tube is damaged and the cooling air leaks.

[0009] The utility model adopts the following technical solutions:

[0010] A multifunctional flexible tube leakage measuring device comprises: an outer layer structure having a hollow interior, an opening on one side, a first winding tube located inside, and a front plate located on the other side, with a first measuring hole and a second measuring hole provided on the surface of the front plate; an inner layer structure having one end detachably arranged inside the outer layer structure, having a second winding tube and a flange, and a third measuring hole provided on the surface of the flange; and an end face mask connected between the outer layer structure and the inner layer structure.

[0011] Preferably, the outer structure further includes a rear plate and an outer protective plate located between the front plate and the rear plate, the front plate is provided with a plurality of first through holes, and the rear plate is provided with a plurality of second through holes.

[0012] Preferably, there are two outer guard plates between the front plate and the rear plate, the ends of the outer guard plates are provided with fixed flanges, an adjustment pad is provided between the two fixed flanges, and a plurality of third through holes are provided on the fixed flanges.

[0013] Preferably, the flange is provided with a plurality of screws detachably connected to the outer structure.

[0014] Preferably, the outer structure has a front blind flange and a rear blind flange at both ends respectively, and the rear blind flange has a fourth measuring hole.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] This utility model provides a multifunctional flexible tube leakage measurement device, comprising an outer structure, an inner structure, and an end face mask. This device detects leakage in wound tubes before production, enabling the development and analysis of contingency plans in the event of subsequent bellows damage and cooling air leakage. Specifically, prior to use, the device can quickly assess rotor cooling air leakage in the event of bellows failure, enabling the development of emergency plans for subsequent emergencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the steam turbine cooling structure in the prior art.

[0018] Figure 2 Schematic diagram of the flexible pipe structure in the prior art.

[0019] Figure 3 This is the gas leakage measuring device of this application.

[0020] Figure 4 Schematic diagram of the outer structure.

[0021] Figure 5 for Figure 4 Schematic diagram of the A-direction structure.

[0022] Figure 6 for Figure 4 Schematic diagram of the B-direction structure.

[0023] Figure 7 Schematic diagram of the inner structure.

[0024] Figure 8 A side view of the inner structure.

[0025] Figure 9 This is a schematic structural diagram of another embodiment of the outer layer structure.

[0026] In the figure, outer layer structure 1, opening 1-1, first winding tube 1-2, front plate 1-3, first measuring hole 1-3-1, second measuring hole 1-3-2, first through hole 1-3-3, rear plate 1-4, second through hole 1-4-1, outer guard plate 1-5, fixing flange 1-6, third through hole 1-6-1, adjusting pad 1-7, front blind flange 1-8, rear blind flange 1-9, fourth measuring hole 1-9-1, inner layer structure 2, second winding tube 2-1, flange 2-2, third measuring hole 2-2-1, screw 2-2-2, end face mask 3. DETAILED DESCRIPTION

[0027] In order to facilitate understanding of the technical solution of the present utility model, the following is a detailed description with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 3-Figure 8 As shown, a multifunctional flexible tube leakage measuring device includes an outer layer structure 1, an inner layer structure 2 and an end face mask 3;

[0029] like Figure 4 As shown, the outer layer structure 1 is a hollow structure with an opening 1-1 located on the right side of the diagram, a first winding tube 1-2 located inside, and a front plate 1-3 located on the left side of the diagram. The surface of the front plate 1-3 is provided with a first measuring hole 1-3-1 and a second measuring hole 1-3-2;

[0030] like Figure 7-Figure 8 As shown, one end of the inner structure 2 is detachably arranged in the outer structure 1, and has a second winding tube 2-1 and a flange 2-2. The surface of the flange 2-2 is also provided with a third measuring hole 2-2-1;

[0031] The end face mask 3 is connected between the outer structure 1 and the inner structure 2, and is specifically arranged on the right side of the outer structure 1 and the inner structure 2, playing the role of connecting the outer structure 1 and the inner structure 2. The end face mask 3 can be connected between the outer structure 1 and the inner structure 2 by bolts and nuts.

[0032] The multifunctional flexible pipe leakage measuring device of the present application can measure the leakage of the wound pipe before the flexible pipe is produced, and carry out corresponding emergency plan preparation and analysis in advance in the event that the subsequent corrugated pipe is damaged and the cooling air leaks.

[0033] like Figure 4-Figure 6 As shown, as an embodiment, the outer layer structure 1 also includes a rear plate 1-4 and an outer guard plate 1-5 located between the front plate 1-3 and the rear plate 1-4. The front plate 1-3, the rear plate 1-4 and the outer guard plate 1-5 cooperate to form a cylindrical outer layer structure body; a plurality of first through holes 1-3-3 are provided on the front plate 1-3, and a plurality of second through holes 1-4-1 are provided on the rear plate 1-4.

[0034] like Figure 4-Figure 6 As shown, as an embodiment, there are two outer guard plates 1-5 between the front plate 1-3 and the rear plate 1-4, and the ends of the outer guard plates 1-5 are provided with fixed flanges 1-6, and there are adjustment pads 1-7 between the two fixed flanges 1-6. By changing the number or width of the adjustment pads 1-7, the width between the front plate 1-3 and the rear plate 1-4 can be changed, thereby adjusting the length of the working state of the first winding tube 1-2 and the second winding tube 2-1; in addition, a plurality of third through holes 1-6-1 are provided on the fixed flange 1-6.

[0035] like Figure 7-Figure 8 As shown, as an embodiment, the flange 2-2 is provided with a plurality of screws 2-2-2 that are detachably connected to the outer structure 1, and the screws 2-2-2 cooperate with the first through holes 1-3-3 of the front plate 1-3 to realize the detachable connection between the outer structure 1 and the inner structure 2.

[0036] A method for using a multifunctional flexible tube leakage measuring device is applicable to the multifunctional flexible tube leakage measuring device, including a single inner layer internal pressure leakage measuring method, a single outer layer internal pressure leakage measuring method, a single outer layer external pressure leakage measuring method, an inner and outer double layer internal pressure leakage measuring method, and an inner and outer double layer external pressure leakage measuring method.

[0037] The single inner layer internal pressure leakage measurement method includes: using the two third measuring holes 2-2-1 on the flanges 2-2 at both ends of the inner layer structure 2 as air inlet holes and pressure measurement holes respectively, adjusting the internal pressure of the second winding tube 2-1, and using an external flow meter to measure the air flow flowing through the second winding tube 2-1 to achieve the internal pressure leakage measurement of the single inner layer winding tube structure.

[0038] The single outer layer internal pressure leakage measurement method includes: Figure 9 As shown, a front blind flange 1-8 and a rear blind flange 1-9 are provided at both ends of the outer layer structure 1. The rear blind flange 1-9 has a fourth measuring hole 1-9-1. The first measuring hole 1-3-1 is vented, maintaining communication between the exterior of the first coiled tube 1-2 and the atmosphere. The fourth measuring hole 1-9-1 serves as an air inlet, and the second measuring hole 1-3-2 measures the pressure within the first coiled tube 1-2. By adjusting the pressure within the first coiled tube 1-2, an external flowmeter measures the air flow through the first coiled tube 1-2, thereby achieving internal pressure leakage measurement for a single outer layer structure. Venting refers to communication with the atmosphere, not connecting to other structures.

[0039] The method for measuring the external pressure leakage of a single outer layer includes: emptying the second measuring hole 1-3-2 and the fourth measuring hole 1-9-1, keeping the interior of the first winding tube 1-2 connected to the atmospheric cavity, using the two first measuring holes 1-3-1 as an air inlet and a pressure measurement hole respectively, and adjusting the external pressure of the first winding tube 1-2. An external flow meter measures the air flow flowing through the first winding tube 1-2, thereby realizing the external pressure leakage measurement of the single outer layer structure.

[0040] The method for measuring the leakage of the inner and outer double-layer internal pressure includes: venting the first measuring hole 1-3-1, keeping the outside of the first winding tube 1-2 connected to the atmospheric cavity, venting the second measuring hole 1-3-2 and sealing the fourth measuring hole 1-9-1; using the two third measuring holes 2-2-1 on the flanges 2-2 at both ends of the inner layer structure 2 as air inlet holes and pressure measurement holes respectively, by adjusting the internal pressure of the second winding tube 2-1, using an external flow meter to measure the air flow flowing through the second winding tube 2-1, and realizing the leakage measurement of the internal pressure of the single and double winding tube structure.

[0041] The method for measuring the leakage of the inner and outer double-layer external pressure includes: using the two first measuring holes 1-3-1 as the air inlet and the pressure measuring hole respectively, emptying the second measuring hole 1-3-2 and sealing the fourth measuring hole 1-9-1; emptying the two third measuring holes 2-2-1 on the flanges 2-2 at both ends of the inner layer structure 2, keeping the interior of the second winding tube 2-1 connected to the atmospheric cavity, and by adjusting the pressure inside the second winding tube 2-1, an external flow meter measures the air flow flowing through the winding tube, thereby realizing the leakage measurement of the external pressure of the single and double winding tube structure.

[0042] The above are only preferred embodiments of the present invention. The scope of protection of the present invention shall be based on the scope defined by the claims. Several improvements and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall also be regarded as the scope of protection of the present invention.

Claims

1. A multifunctional flexible tube leakage measuring device, characterized in that: include: The outer layer structure (1) is a hollow structure inside, and has an opening (1-1) located on one side, a first winding tube (1-2) located inside, and a front plate (1-3) located on the other side, and a first measuring hole (1-3-1) and a second measuring hole (1-3-2) are provided on the surface of the front plate (1-3); The inner layer structure (2) is detachably arranged at one end in the outer layer structure (1), and comprises a second winding tube (2-1) and a flange (2-2), wherein a third measuring hole (2-2-1) is further provided on the surface of the flange (2-2); The end face mask (3) is connected between the outer layer structure (1) and the inner layer structure (2).

2. The multifunctional flexible tube leakage measuring device according to claim 1, characterized in that: The outer layer structure (1) further comprises a rear plate (1-4) and an outer protective plate (1-5) located between the front plate (1-3) and the rear plate (1-4); the front plate (1-3) is provided with a plurality of first through holes (1-3-3); and the rear plate (1-4) is provided with a plurality of second through holes (1-4-1).

3. The multifunctional flexible tube leakage measuring device according to claim 2, characterized in that: Two outer guard plates (1-5) are provided between the front plate (1-3) and the rear plate (1-4); fixed flanges (1-6) are provided at the ends of the outer guard plates (1-5); an adjustment pad (1-7) is provided between the two fixed flanges (1-6); and a plurality of third through holes (1-6-1) are provided on the fixed flanges (1-6).

4. The multifunctional flexible tube leakage measuring device according to claim 1, characterized in that: The flange (2-2) is provided with a plurality of screw rods (2-2-2) which are detachably connected to the outer structure (1).

5. The multifunctional flexible tube leakage measuring device according to claim 1, characterized in that: The outer layer structure (1) has a front blind flange (1-8) and a rear blind flange (1-9) at both ends respectively, and the rear blind flange (1-9) has a fourth measuring hole (1-9-1).

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