Pressure test lead breakout box and cabinet for gas turbine

Abstract

The application provides a pressure test lead switching box and cabinet for a gas turbine, and relates to the technical field of gas turbine testing, which comprises a box body, a mounting panel, pressure pipeline connectors, a sleeve joint and a core pipe. The pressure pipeline connectors comprise fixed parts and movable parts. The fixed parts and the sleeve joint are connected with the mounting panel. The fixed parts have pressure connection nozzles. The inlet of the sleeve joint is suitable for being connected with a stainless steel pressure lead pipe of a pressure measurement interface of the gas turbine. The pressure connection nozzles are multiple and are arranged at intervals. The sleeve joints are multiple and correspond to the pressure connection nozzles one by one. The inlet of the core pipe is connected with the movable part. The inlet of the core pipe and the outlet of the pressure connection nozzle can be communicated to form a pressure channel when the movable part and the fixed part are docked. The outlet of the core pipe is suitable for being connected with a pressure scanning valve. The core pipes are multiple and correspond to the pressure connection nozzles one by one. The application can realize the rapid integration and disassembly of multiple pressure lead pipelines, and effectively reduces the wrong connection rate.

Description

Technical Field

[0001] This invention relates to the field of gas turbine testing technology, and more particularly to a pressure test lead adapter box and cabinet for gas turbines. Background Technology

[0002] Pneumatic pressure testing is a crucial part of gas turbine performance evaluation. By conducting pneumatic pressure tests on the gas turbine, aerodynamic and thermodynamic data under different operating conditions can be obtained, thereby analyzing the gas turbine's performance. Currently, the conventional lead-in implementation involves drawing the required gas pressure from the gas turbine through a stainless steel pressure-sensing tube. This stainless steel pressure-sensing tube is then connected to a nylon pressure-sensing tube via a crimped adapter. The integrated nylon pressure-sensing tube is then connected to the intermediate cabinet of the pressure testing system on the second-layer platform outside the casing for aggregation. After aggregation, the gas pressure from the gas turbine is transferred from the pressure connector to the pressure scanning valve of the testing system via the nylon pressure-sensing tube.

[0003] However, the above-mentioned lead wire scheme has the following problems in practical use:

[0004] 1. There are numerous pressure measurement points in the gas turbine. Testers need to connect a large number of pressure measurement lead lines at the gas turbine site. The conventional one-to-one single-point wiring method has the problems of low connection efficiency and high error rate. 2. There are many joints that need to be tightened, which also leads to a decrease in the reliability of the joints; 3. The limited space at the pressure lead pipeline junction point causes great inconvenience to the inspection of the measuring points during subsequent testing. First, the steel platform grating must be removed before the measuring point lead to be checked can be reached. Second, it is impossible to quickly locate the problematic measuring point lead. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] To this end, one embodiment of the present invention provides a pressure test lead adapter box for gas turbines, which enables rapid integration and disassembly of multiple pressure test lines, effectively reducing the error rate.

[0007] Another embodiment of the present invention provides a pressure test lead cabinet for a gas turbine.

[0008] According to an embodiment of the present invention, a pressure test lead adapter box for a gas turbine includes a housing, a mounting panel, a pressure line connector, a ferrule fitting, and a core tube. The housing has an open receiving cavity. The mounting panel is connected to the housing to cover the openness of the receiving cavity. The pressure line connector includes a fixed part and a movable part. Both the fixed part and the ferrule fitting are connected to the mounting panel. The fixed part has a pressure nozzle. The inlet of the pressure nozzle and the outlet of the ferrule fitting are both located in the receiving cavity and are connected to each other via a nylon tube. The inlet of the ferrule fitting is adapted to connect to a stainless steel pressure tap of the pressure measurement interface of the gas turbine. There are multiple pressure nozzles arranged at intervals, and there are multiple ferrule fittings corresponding to each pressure nozzle. The inlet of the core tube is connected to the movable part. The inlet of the core tube and the outlet of the pressure nozzle can connect when the movable part is connected to the fixed part to form a pressure channel. The outlet of the core tube is adapted to connect to a pressure scanning valve. There are multiple core tubes corresponding to each pressure nozzle.

[0009] According to an embodiment of the present invention, a pressure test lead adapter box for a gas turbine allows, during the test system installation phase, the stainless steel pressure lead lines of the gas turbine's pressure measurement interface to be connected one by one to the inlet of a compression fitting. At this time, the compression fitting serves as the input port of the adapter box. Inside the adapter box, or the receiving cavity, a nylon tube connects the outlet of each compression fitting to the inlet of the pressure nozzle (this part of the operation can be completed during the factory prefabrication phase). Then, through the docking of the moving part and the fixed part, the gas pressure of the gas turbine is transmitted from the core tube to the pressure scanning valve to obtain pressure data from a large number of pressure measurement points in the gas turbine. Since there are multiple pressure nozzles and they are spaced apart... The system features multiple compression fittings, each corresponding to a pressure port, and multiple core tubes, also corresponding to pressure ports. This allows for high-density integration and transfer of multiple pressure lines through the connection of stainless steel pressure lines to the compression fittings and between the fixed and movable parts. This solves the efficiency problem of centralized on-site transfer for large-scale pressure measurement points (heavy-duty gas turbine testing involves hundreds of pneumatic pressure measurement points, with pressure lines distributed across different parts of the unit). It avoids the low connection efficiency and high error rate of conventional one-to-one single-point wiring methods. Compared to related technologies, this invention enables rapid integration and disassembly of multiple pressure lines, effectively reducing the error rate.

[0010] In some embodiments, when the movable part is connected to the fixed part, a sealing structure is provided between the outlet of each pressure nozzle and the inlet of the corresponding core tube.

[0011] In some embodiments, the sealing structure includes a first sealing ring and a second sealing ring, one of which is located at the outlet of the pressure port and the other is located at the inlet of the corresponding core tube. When the movable part and the fixed part are connected, the first sealing ring and the second sealing ring abut against each other.

[0012] In some embodiments, at least one of the first sealing ring and the second sealing ring is an NBR nitrile rubber O-ring.

[0013] In some embodiments, the ferrule is a 316L stainless steel ferrule, wherein the ferrule contains 2% to 3% molybdenum and has a pitting resistance equivalent number ≥24. The crimping torque between the ferrule and the stainless steel pressure tap of the pressure measurement interface of the gas turbine is M, and M is 30 N·m to 35 N·m.

[0014] In some embodiments, the fixing part is detachably connected to the mounting panel.

[0015] In some embodiments, one of the fixed part and the movable part is provided with a positioning pin, and the other is provided with a positioning hole. When the movable part is docked with the fixed part, the positioning pin is engaged in the positioning hole to prevent the docking of the movable part and the fixed part from being misaligned. The positioning pin is located at the center of either the fixed part or the movable part.

[0016] In some embodiments, the core tube is a polydodecyl lactam core tube.

[0017] In some embodiments, at least one of the core tube, the nylon tube, and the inlet on the mounting panel adjacent to the pressure port is provided with a numbered identifier, which is at least one of text, letters, symbols, and graphics.

[0018] In some embodiments, the mounting panel has two mounting areas arranged spaced apart in a left-right direction. A portion of the plurality of ferrule connectors is arranged in one of the mounting areas, while the remaining ferrule connectors are arranged in the other mounting area. The pressure line connectors are two in number and are located on both sides of the mounting area along the left-right direction; or, The pressure line connectors are two in number and are arranged at intervals in the vertical direction. The two pressure line connectors are located on the same side of the installation area in the horizontal direction.

[0019] According to an embodiment of the present invention, a pressure test lead cabinet for a gas turbine includes a cabinet body and a transfer box, wherein the transfer box is the transfer box described in any of the above embodiments, and there are multiple transfer boxes arranged at intervals within the cabinet body.

[0020] According to an embodiment of the present invention, the pressure test lead cabinet for gas turbines is designed with a high-density integrated transfer structure that can realize multiple pressure lines, which improves the connection efficiency of field wiring and reduces the error rate. Therefore, compared with related technologies, the cabinet using this transfer box can shorten the time for test preparation and test point switching, improve the testing efficiency of gas turbines, and dynamically adjust the scale of test points by increasing or decreasing the number of transfer boxes to match test requirements.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 This is a first-view structural schematic diagram of a pressure test lead adapter box for a gas turbine according to an embodiment of the present invention.

[0023] Figure 2 This is a second-view structural schematic diagram of a pressure test lead adapter box for a gas turbine according to an embodiment of the present invention (the box is cut in half in the figure).

[0024] Figure 3 This is a schematic diagram of the connection structure of the pressure line connector, core tube, and nylon tube in a pressure test lead adapter box for a gas turbine according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the ferrule connector in a pressure test lead adapter box for a gas turbine according to an embodiment of the present invention.

[0026] Figure label: 1. Box body; 11. Receiving cavity; 2. Mounting panel; 21. Mounting area; 3. Pressure line connector; 31. Fixing part; 311. Pressure nozzle; 32. Moving part; 33. Locating pin; 34. Locating hole; 4. Compression fitting; 5. Core tube; 6. Nylon tubing. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a pressure test lead adapter box for a gas turbine, comprising a housing 1, a mounting panel 2, a pressure line connector 3, a ferrule connector 4, and a core tube 5. The housing 1 has an open receiving cavity 11. The mounting panel 2 is connected to the housing 1 to cover the openness of the receiving cavity 11. The pressure line connector 3 includes a fixed part 31 and a movable part 32, that is, the pressure line connector 3 is a split structure, divided into two parts: the fixed part 31 and the movable part 32. Both the fixed part 31 and the ferrule connector 4 are connected to the mounting panel 2. The fixed part 31 has a pressure nozzle 311. The inlet of the pressure nozzle 311 and the outlet of the ferrule connector 4 are both located in the receiving cavity 11 and are connected to each other through a nylon tube 6. The inlet of the ferrule connector 4 is adapted to be connected to the stainless steel pressure tap of the pressure measurement interface of the gas turbine. There are multiple pressure nozzles 311 arranged at intervals, that is, multiple pressure nozzles 311 are arranged at intervals on the fixed part 31. Multiple compression fittings 4 are provided and each corresponds to a pressure port 311; the inlet of the core tube 5 is connected to the movable part 32, and the inlet of the core tube 5 and the outlet of the pressure port 311 can be connected when the movable part 32 and the fixed part 31 are mated to form a pressure channel; the outlet of the core tube 5 is suitable for connection to a pressure scanning valve; multiple core tubes 5 are provided and each corresponds to a pressure port 311.

[0029] According to an embodiment of the present invention, in the pressure test lead adapter box for a gas turbine, during the test system installation phase, the stainless steel pressure lead lines of the gas turbine's pressure measurement interface can be connected one by one to the inlet of the ferrule connector 4. At this time, the ferrule connector 4 is the input port of the adapter box. Inside the adapter box, or the receiving cavity 11, a nylon tube 6 is used to connect the outlet of each ferrule connector 4 to the inlet of the pressure nozzle 311 (this part of the operation can be completed in the factory prefabrication stage). Then, through the docking of the moving part 32 and the fixed part 31, the gas pressure of the gas turbine is transmitted to the pressure scanning valve by the core tube 5 to obtain pressure data of a large number of pressure measurement points in the gas turbine. Among them, since the pressure nozzle 311 is multiple Furthermore, the components are arranged at intervals, with multiple compression fittings 4 corresponding one-to-one with pressure connectors 311, and multiple core tubes 5 corresponding one-to-one with pressure connectors 311. Therefore, high-density integrated transfer of multiple pressure lines can be achieved through the docking of stainless steel pressure lines with compression fittings 4 and docking of fixed part 31 with movable part 32. This solves the problem of efficiency in centralized transfer at large-scale pressure measurement points (heavy-duty gas turbine testing involves hundreds of pneumatic pressure measurement points, with pressure lines for each measurement point scattered in different parts of the unit). It avoids the shortcomings of conventional one-to-one single-point wiring methods, such as low connection efficiency and high error rate. Compared with related technologies, this invention can achieve rapid integration and disassembly of multiple pressure lines, effectively reducing the error rate.

[0030] Specifically, both the fixing part 31 and the movable part 32 can be made of aluminum alloy. The fixing part 31 is the output port of the adapter box. The fixing part 31 may include a housing and a pressure connector 311. The housing is provided with the pressure connector 311. The fixing part 31 can be connected to the mounting panel 2 by a through-plate mounting method. That is, the mounting panel 2 is provided with a through hole that penetrates the mounting panel 2 along its thickness direction. The housing of the fixing part 31 can be connected to the mounting panel 2 and cover the through hole. At least a portion of the pressure connector 311 of the fixing part 31 can pass through the through hole and be located in the receiving cavity 11. The outlet of the pressure connector 311 is located on the side of the mounting panel 2 away from the receiving cavity 11. The compression fitting 4 can be connected to the mounting panel 2 by a through-plate mounting method. In this case, the outlet of the compression fitting 4 is located in the receiving cavity 11. It can be connected to the inlet of the pressure connector 311 of the fixing part 31 through a nylon tube 6 such as 1.5mm. The inlet of the compression fitting 4 is located on the side of the mounting panel 2 away from the receiving cavity 11. The compression fitting 4 can be made of 316 stainless steel. The stainless steel pressure tube can have a diameter of 1.5 mm and a wall thickness of 0.25 mm.

[0031] Furthermore, the core tube 5 can be a nylon core tube, and multiple nylon core tubes can form a nylon multi-core tube structure.

[0032] In addition, the nylon multi-core tube structure can be a commercially available series of products. The nylon multi-core tube structure can be customized to meet the requirements according to the actual length, number of core tubes and core wire specifications. The movable parts are integrated at both ends (where the two ends are the inlet end of all the core tubes 5 in the nylon multi-core tube structure and the outlet end of all the core tubes 5 in the nylon multi-core tube structure. The inlet end of all the core tubes 5 in the nylon multi-core tube structure is integrated into the movable part that matches the fixed part 31, and the outlet end of all the core tubes 5 in the nylon multi-core tube structure is integrated into the movable part that matches the pressure scanning valve), so as to realize the integrated layout and installation of multiple pressure tapping pipelines.

[0033] For example, as shown in the figure, the overall design of the adapter box can adopt the form of a 3U industrial control chassis. The chassis 1 is assembled from 1.5mm thick galvanized steel plate, and the external dimensions of the chassis 1 are 400×300×100mm. The mounting panel 2 is compatible with a general 19-inch cabinet (i.e., the cabinet mentioned below). There are 2 sets of pressure line connectors 3, and their fixing parts 31 are integrated into the mounting panel 2. Each pressure line connector 3 contains 18 independent pressure channels. Up to 18 pressure lines can be connected and disconnected in one disassembly and assembly. The fixing part 31 can be equipped with 18 pressure nozzles 311, which can connect 18 1.5mm nylon tubes 6, and they face the inside of the adapter box (i.e., the receiving cavity 11) when installed. There can be 32 sets of compression fittings 4. The pressure nozzles 311 are connected to the 32 sets of compression fittings 4 through 32 nylon tubes 6 to form 32 pressure lines.

[0034] At this time, each adapter box can meet the needs of up to 32 independent pressure pipelines, with a maximum pressure of 5.0MPa and a maximum operating temperature of 80℃.

[0035] It should be noted that after the movable part 32 and the fixed part 31 are connected, the pressure nozzle 311 and the core tube 5 are connected and together form the pressure channel of the pressure pipeline connector 3.

[0036] In some embodiments, when the movable part 32 and the fixed part 31 are connected, a sealing structure (not shown in the figure) is provided between the outlet of each pressure port 311 and the inlet of the corresponding core tube 5, so as to seal the connection between the two by the sealing structure, avoid the risk of leakage under high pressure conditions, and ensure the reliability of the pressure test results.

[0037] In some embodiments, the sealing structure includes a first sealing ring and a second sealing ring, one of which is disposed at the outlet of the pressure port 311 and the other is disposed at the inlet of the corresponding core tube 5. When the movable part 32 and the fixed part 31 are connected, the first sealing ring and the second sealing ring abut against each other.

[0038] Understandably, compared to related technologies where the sealing performance at each individual joint relies solely on the compression of the fixed part 31 and the moving part 32, there is a risk of leakage after long-term vibration under 5.0MPa high-pressure conditions. This invention, however, utilizes a redundant sealing structure formed by two sealing rings to control the leakage rate within the 0–5.0MPa operating range to ≤1×10⁻⁶. -4 Pa·m 3 / s, which solves the core problem of insufficient sealing reliability of single-channel connectors (i.e., the connector in a single pressure channel) in high-pressure pneumatic testing scenarios.

[0039] In some embodiments, at least one of the first sealing ring and the second sealing ring is an NBR nitrile rubber O-ring, that is, both the first sealing ring and the second sealing ring are NBR nitrile rubber O-rings; or, the first sealing ring is an NBR nitrile rubber O-ring; or, the second sealing ring is an NBR nitrile rubber O-ring.

[0040] Understandably, NBR (Nitrile Butadiene Rubber) is a synthetic rubber copolymerized from acrylonitrile (ACN) and butadiene. It has excellent oil resistance, strong resistance to non-polar oils such as mineral oil, lubricating oil, gasoline, and diesel, and also has high wear resistance, good air tightness, and good heat resistance. In addition, it has strong adhesion, which can further ensure good sealing between the inlet of the ferrule connector 4 and the stainless steel pressure tap of the pressure measurement interface of the gas turbine.

[0041] Specifically, the specifications of NBR nitrile rubber O-rings can be, for example, φ2.5×1.5mm.

[0042] like Figure 4 As shown, in some embodiments, the ferrule connector 4 is a 316L stainless steel ferrule connector, wherein the ferrule connector 4 contains 2% to 3% molybdenum and has a pitting resistance equivalent number ≥24.

[0043] The crimping torque between the compression fitting 4 and the stainless steel pressure tap of the pressure measurement interface of the gas turbine is M, and M is 30 N·m to 35 N·m. M can be, for example, 30 N·m, 31 N·m, 32 N·m, 33 N·m, 34 N·m, 35 N·m, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0044] Understandably, the testing environment for gas turbines is harsh, characterized by high temperatures (≤80℃), high humidity, and trace amounts of sulfides (SO2 concentration ≤50mg / m³). 3 In the complex atmosphere of gas turbines, ordinary 304 stainless steel compression fittings have insufficient pitting resistance (PREN is about 18), posing a risk of corrosion and gas leakage. At the same time, traditional compression fittings accumulate pipe wall deformation during repeated disassembly and assembly, and the sealing surface is significantly damaged after more than 10 disassembly and assembly cycles, which cannot meet the repeated use requirements of gas turbines for multiple rounds of testing.

[0045] This invention uses 316L stainless steel (containing 2%–3% molybdenum, PREN ≥ 24) to manufacture the through-plate type compression fitting 4, and controls the crimping torque between the compression fitting 4 and the stainless steel pressure-sensing tube to be 30 N·m–35 N·m. This allows the tube wall of the compression fitting 4 to undergo 8%–12% elastic deformation, forming a metal-to-metal mechanical seal between the compression fitting 4 and the stainless steel pressure-sensing tube. This achieves leak-free operation under 5.0 MPa high pressure and allows for repeated disassembly and assembly more than 10 times without damaging the tube wall. From the perspectives of material selection and mechanical design, this invention solves the problem of reliable connection and multiple reuse of high-pressure pipelines in corrosive environments.

[0046] like Figure 1 As shown, in some embodiments, the fixing part 31 is detachably connected to the mounting panel 2, so that if either of the two connected parts fails, only the corresponding damaged part needs to be replaced to enable the normal operation of the adapter box, without scrapping the entire adapter box, thus effectively reducing the maintenance cost of the adapter box.

[0047] Specifically, the housing of the fixing part 31 (such as the flange of the housing) can be fixed to the mounting panel 2 by fasteners, wherein the fasteners can be components that can achieve fastening performance, such as bolts, screws or studs.

[0048] like Figure 3As shown, in some embodiments, one of the fixed part 31 and the movable part 32 is provided with a positioning pin 33, and the other is provided with a positioning hole 34. When the movable part 32 and the fixed part 31 are connected, the positioning pin 33 is engaged in the positioning hole 34 to prevent the movable part 32 and the fixed part 31 from being misaligned during connection.

[0049] The locating pin 33 is located at the center of either the fixed part 31 or the movable part 32.

[0050] Understandably, the above structural design ensures that the multiple pressure channels in the pressure line connector 3 are synchronously aligned, preventing channel crosstalk caused by misalignment of the fixed part 31 and the movable part 32.

[0051] Specifically, the locating pin 33 can be detachably connected to the fixed part 31 or the movable part 32 (e.g., by a threaded connection). The diameter of the locating pin 33 can be, for example, 3 mm, with a positioning accuracy of ≤0.1 mm.

[0052] It should be noted that, in order to achieve the centering and docking between the movable part 32 and the fixed part 31, in addition to using the positioning pin 33 structure for positioning, other positioning structures in this field can also be used, and no specific limitation is made here.

[0053] like Figure 1 As shown, in some embodiments, the core tube 5 is a polydodecalactam core tube, also known as a PA12 core tube 5. PA12 (polyamide 12) has excellent oil resistance, chemical corrosion resistance and low moisture absorption (24h water absorption rate <0.3%). It maintains toughness and does not become brittle in the range of -40℃ to +100℃. Therefore, the core tube 5 is made of this material, which can effectively reduce the corrosion damage to the gas turbine test site caused by the harsh environment and ensure the reliability of the test results.

[0054] Furthermore, the core tube 5 has a wall thickness of 0.5 mm, an inner diameter of 1.5 mm, a working pressure of 10 MPa, and a burst pressure of ≥30 MPa (or a safety factor ≥6). With the aforementioned structural design, the core tube 5 can meet the maximum pressure requirement of 5 MPa and has sufficient safety margin.

[0055] like Figure 1 and Figure 2As shown, in some embodiments, at least one of the core tube 5, nylon tube 6, and mounting panel 2 near the inlet of pressure connector 311 is provided with a numbered identifier (not shown in the figure). That is, all of the core tube 5, nylon tube 6, and mounting panel 2 near the inlet of pressure connector 311 are provided with numbered identifiers; or, both the core tube 5 and nylon tube 6 are provided with numbered identifiers; or, both the core tube 5 and mounting panel 2 near the inlet of pressure connector 311 are provided with numbered identifiers; or, any one of the core tube 5, nylon tube 6, and mounting panel 2 near the inlet of pressure connector 311 is provided with a numbered identifier. The numbered identifier can be at least one of text, letters, symbols, and graphics.

[0056] Understandably, during the factory manufacturing stage, each nylon tube 6 can be marked with a number according to the measurement point number. The tubes are led from the back outlet of the compression fitting 4 (i.e., the outlet of the compression fitting 4) to the inlet of the pressure connector 311 with the corresponding number on the mounting panel 2. When the moving part 32 and the fixed part 31 are connected, the number markings on each core tube 5 in the nylon multi-core tube structure must correspond to the pressure connector 311 with the corresponding number. The number markings of the entire pipeline correspond one-to-one with the measurement point number to eliminate the problem of cross-entanglement of scattered wiring.

[0057] like Figure 1 As shown, in some embodiments, the mounting panel 2 has a mounting area 21, which has two areas and is spaced apart in the left-right direction. Some of the multiple ferrule connectors 4 are arranged in an array in one mounting area 21, and the remaining ferrule connectors 4 are arranged in an array in the other mounting area 21. There are two pressure line connectors 3, which are respectively located on both sides of the mounting area 21 in the left-right direction.

[0058] Alternatively, there may be two pressure line connectors 3 arranged at intervals in the vertical direction, with the two pressure line connectors 3 located on the same side of the mounting area 21 in the horizontal direction.

[0059] An embodiment of the present invention provides a pressure test lead cabinet for a gas turbine (not shown in the figure), comprising a cabinet body and a transfer box. The transfer box is any of the transfer boxes described above, and there are multiple transfer boxes arranged at intervals within the cabinet body.

[0060] According to an embodiment of the present invention, the pressure test lead cabinet for gas turbines is designed with a high-density integrated transfer structure that can realize multiple pressure lines, which improves the connection efficiency of field wiring and reduces the error rate. Therefore, compared with related technologies, the cabinet using this transfer box can shorten the time for test preparation and test point switching, improve the testing efficiency of gas turbines, and dynamically adjust the scale of test points by increasing or decreasing the number of transfer boxes to match test requirements.

[0061] For example, the enclosure 1 adopts a 3U industrial control chassis (installation height 132mm), which conforms to the EIA-310-D cabinet installation standard. The mounting panel 2 is 482.6mm wide and is compatible with 19-inch standard cabinets. The layout of the mounting panel 2 adopts a two-zone design: the left side is arranged with 32 sets of compression fittings 4 (input ports), arranged in a matrix of 4 rows × 8 columns, with a row spacing of 18mm and a column spacing of 20mm. The measurement point number corresponding to each compression fitting 4 is engraved on the surface of the mounting panel 2; the right side is arranged with the fixing part 31 of 2 sets of pressure pipeline connectors 3 (output ports), arranged vertically, each set covering 16 pressure channels (2×18=36 channels, including 2 spare channels).

[0062] The modular design of this invention allows for the stacking of up to 14 adapter boxes (a total of 448 pressure measurement points) in a single 42U standard cabinet, with each unit operating independently without interference. When the gas turbine testing task changes, the number of measurement points can be dynamically adjusted simply by adding or removing adapter box modules, without the need to re-lay fixed pipelines. The time required for expanding or reconfiguring the testing system is reduced by more than 70% compared to conventional solutions, and each adapter box can be reused across testing tasks, achieving 100% equipment utilization.

[0063] Therefore, compared with related technologies, the present invention has the following technical advantages: 1) In existing gas turbine pneumatic pressure testing, multiple pressure taps are connected to the testing system point-by-point using a separate crimping method. Each stainless steel pressure tap (φ1.5mm×0.25mm) requires individual installation and removal, resulting in a cumbersome and inefficient connection process. Furthermore, the sealing performance at each individual joint relies solely on a single compression clamp, which poses a risk of leakage after prolonged vibration under 5.0MPa high-pressure conditions. This invention integrates multiple high-pressure pneumatic pipeline interfaces into a single pressure pipeline connector, enabling connection and disconnection of 18 pressure channels with a single plug-and-play operation. Simultaneously, a redundant double O-ring sealing structure (two NBR nitrile rubber O-rings per channel, with the main seal and secondary seal arranged in series) controls the leakage rate within the 0–5.0MPa operating range to ≤1×10⁻⁶. - 4 Pa·m 3 / s, which solves the core problem of insufficient sealing reliability of single-channel connectors in high-pressure pneumatic testing scenarios; 2) The gas turbine testing site environment is harsh, with high temperature (≤80℃), high humidity, and trace amounts of sulfides (SO2 concentration ≤50mg / m³). 3In complex environments, ordinary 304 stainless steel compression fittings have insufficient pitting resistance (PREN approximately 18), posing a risk of corrosion and leakage. Furthermore, the traditional compression fitting structure suffers from pipe wall deformation accumulation during repeated disassembly and assembly, resulting in significant damage to the sealing surface after more than 10 disassembly and assembly cycles. This cannot meet the repeated use requirements of gas turbine testing. In contrast, this invention uses 316L stainless steel (containing 2%–3% molybdenum, PREN ≥ 24) to manufacture a through-plate compression fitting. By controlling the crimping torque to 30–35 N·m, the pipe wall undergoes 8%–12% elastic deformation to form a metal-to-metal mechanical seal. This achieves leak-free operation under 5.0 MPa high pressure and allows for more than 10 repeated disassembly and assembly cycles without damaging the pipe wall. From both material selection and mechanical design perspectives, this invention solves the problem of reliable connection and multiple reuse of high-pressure pipelines in corrosive environments. 3) Heavy-duty gas turbine testing involves hundreds of aerodynamic pressure measurement points, with pressure lines for each point scattered across different parts of the unit. Traditional solutions lack engineered devices for centralized and orderly transfer of multiple high-pressure lines, resulting in lengthy test preparation and measurement point switching times, high error rates, and the inability of existing testing equipment to dynamically adjust measurement point capacity according to the scale of the test task. In contrast, this invention integrates 32 high-pressure lines into a single 3U standard chassis, coupled with a nylon multi-core tube structure (18 cores / group, single core tube burst pressure ≥30M). The movable part of the pressure line connector (Pa) enables a single plug-and-play operation to complete 18-channel integrated switching. The EIA-310-D cabinet-compatible design allows a single 42U standard cabinet to install up to 14 switching boxes (a total of 448 pressure measurement points). At the same time, each switching box undergoes 100% airtightness testing on 32 pipelines before leaving the factory (0.6MPa nitrogen pressure holding for 5 minutes, pressure drop ≤0.01MPa). This solves the systemic engineering problem of centralized switching, rapid deployment and flexible expansion of large-scale pressure measurement points in gas turbine testing.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pressure test lead adapter box for a gas turbine, characterized in that, include: A housing having an open receiving cavity; Mounting panel, which is connected to the housing to cover the opening of the receiving cavity; A pressure line connector and a ferrule fitting are provided. The pressure line connector includes a fixed part and a movable part. Both the fixed part and the ferrule fitting are connected to the mounting panel. The fixed part has a pressure nozzle. The inlet of the pressure nozzle and the outlet of the ferrule fitting are both located in the receiving cavity and are connected to each other by a nylon tube. The inlet of the ferrule fitting is adapted to be connected to the stainless steel pressure tap of the pressure measurement interface of the gas turbine. There are multiple pressure nozzles arranged at intervals, and there are multiple ferrule fittings, each corresponding to one of the pressure nozzles. The core tube has its inlet connected to the movable part. The inlet of the core tube and the outlet of the pressure connector can be connected when the movable part and the fixed part are mated to form a pressure channel. The outlet of the core tube is adapted to be connected to a pressure scanning valve. There are multiple core tubes, each corresponding to one of the pressure connectors.

2. The pressure test lead adapter box for a gas turbine according to claim 1, characterized in that, When the movable part is connected to the fixed part, a sealing structure is provided between the outlet of each pressure nozzle and the inlet of the corresponding core tube.

3. The pressure test lead adapter box for a gas turbine according to claim 2, characterized in that, The sealing structure includes a first sealing ring and a second sealing ring. One of the first sealing ring and the second sealing ring is located at the outlet of the pressure port, and the other is located at the inlet of the corresponding core tube. When the movable part and the fixed part are connected, the first sealing ring and the second sealing ring abut against each other.

4. The pressure test lead adapter box for a gas turbine according to claim 3, characterized in that, At least one of the first sealing ring and the second sealing ring is an NBR nitrile rubber O-ring.

5. The pressure test lead adapter box for a gas turbine according to claim 1, characterized in that, The ferrule is a 316L stainless steel ferrule, wherein the molybdenum content of the ferrule is 2% to 3%, and the pitting resistance equivalent number is ≥24. The crimping torque between the ferrule and the stainless steel pressure tap of the pressure measurement interface of the gas turbine is M, and M is 30 N·m to 35 N·m.

6. The pressure test lead adapter box for a gas turbine according to claim 1, characterized in that, The fixing part is detachably connected to the mounting panel.

7. The pressure test lead adapter box for a gas turbine according to claim 1, characterized in that, One of the fixed part and the movable part is provided with a positioning pin, and the other part is provided with a positioning hole. When the movable part is connected with the fixed part, the positioning pin is engaged in the positioning hole to prevent the movable part and the fixed part from being misaligned during connection. The positioning pin is located at the center of either the fixed part or the movable part.

8. The pressure test lead adapter box for a gas turbine according to claim 1, characterized in that, The core tube is a polydodecyl lactam core tube.

9. The pressure test lead adapter box for a gas turbine according to claim 1, characterized in that, At least one of the core tube, the nylon tube, and the inlet of the mounting panel adjacent to the pressure port is provided with a numbered identifier, which is at least one of text, letters, symbols, and graphics.

10. A pressure test lead cabinet for a gas turbine, characterized in that, include: Cabinet; The adapter box is any one of claims 1-9, and there are multiple adapter boxes arranged at intervals within the cabinet.

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