Nuclear power plant generator flange sealing detection device and nuclear power plant generator

Abstract

The utility model relates to a nuclear power plant generator flange sealing performance detection device and a nuclear power plant generator. The nuclear power plant generator flange sealing performance detection device is used for carrying out sealing detection on a generator flange on the nuclear power plant generator. In the device for detecting the sealing performance of the generator flange plate of the nuclear power plant, a test cavity for testing the air tightness is formed on the generator flange plate through a pressure maintaining device, and the test cavity is pressurized through a pumping pressure device, so that the sealing performance of the generator flange plate is tested by means of the pressurized test cavity. Therefore, the sealing performance of the flange plate can be independently evaluated under the condition that the original hydrogen sealing pressure-bearing boundary of the generator is not damaged. Unnecessary shutdown time and cost are reduced, and meanwhile emergency shutdown and safety risks are avoided. In addition, air tightness testing can be carried out on the wire plugging position, so that the position with poor sealing can be positioned, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power facilities, in particular to a nuclear power plant generator flange sealing detection device and a nuclear power plant generator. Background Art

[0002] In the efficient and safe operation of modern nuclear power plants, accurate monitoring of the operating temperature of large generators is a key link in maintaining the health of the equipment and preventing overheating damage. For certain types of high-power generators, such as those with half-speed design and combined water-cooling and hydrogen-cooling technology, temperature monitoring of the stator and rotor is particularly important. Under normal operation, the temperature measuring flange is the core component responsible for transmitting the temperature signal inside the generator to the central control room for remote monitoring.

[0003] In actual applications, if the temperature measuring flange needs to be troubleshooted, maintained, replaced or otherwise operated, it is easy for the flange to have insufficient airtightness at the joint position with the generator, thus causing abnormal operation of the nuclear power generator. However, the airtightness test of the flange can only be verified after it is assembled and put into daily operation of the generator. This lagging detection mechanism undoubtedly increases the complexity and uncertainty of maintenance work. Once insufficient airtightness is found, not only will additional time and resources be required to locate and repair the fault, but the production plan and economic benefits of the power plant may also be affected due to long downtime waiting. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a nuclear power plant generator flange sealing detection device and a nuclear power plant generator, which can solve the problem that the airtightness of the temperature measuring flange can only be detected when the generator is running.

[0005] The first aspect of the utility model provides a nuclear power plant generator flange sealing detection device, which includes:

[0006] A pressure-maintaining device, the pressure-maintaining device comprising a pressure-maintaining cylinder, a bottom plate and a test flange, the bottom plate and the test flange are respectively sealed and connected to the two ends of the pressure-maintaining cylinder, and the bottom plate closes the end of the pressure-maintaining cylinder, and the test flange is provided with an avoidance hole, and the test flange is used to fix the generator flange, so that the pressure-maintaining cylinder, the bottom plate and the test flange jointly define a test cavity on the generator flange, and each wire insertion position on the generator flange is exposed in the test cavity through the avoidance hole; and

[0007] A pump pressure device, the pump pressure device includes an air pipe and a measuring meter, the measuring meter is arranged on the air pipe, and the air pipe is used to introduce gas into the test cavity to increase the air pressure of the test cavity.

[0008] Preferably, the test flange is further provided with an avoidance groove, and the avoidance groove is connected to the avoidance hole;

[0009] The avoidance hole is used for the boss on the generator flange to be inserted therein.

[0010] Preferably, the depth of the avoidance groove is greater than or equal to the height of the boss.

[0011] Preferably, a sealing flange surface is provided on the top surface of the test flange, and the sealing flange surface is used for sealing against the generator flange.

[0012] Preferably, the sealing flange surface has a Ra value less than 1.6 μm.

[0013] Preferably, the pump pressure device further comprises a stop valve, which is arranged on the gas supply pipe, and the gas flows into the measuring meter and the test chamber via the stop valve.

[0014] Preferably, the measuring gauge comprises a temperature gauge and / or a pressure gauge; or

[0015] The measuring meter comprises a temperature and pressure integrated meter.

[0016] Preferably, the nuclear power plant generator flange sealing detection device further comprises a connecting device;

[0017] Wherein, the connecting device comprises a plurality of connecting bolts, each of which is passed through the generator flange, and each of which is threadedly connected to the test flange; or

[0018] The connecting device includes a plurality of connecting bolts and a plurality of connecting nuts, each of the connecting bolts is passed through the generator flange and the test flange, and each of the connecting bolts is threadedly connected to each of the connecting nuts in a one-to-one correspondence.

[0019] Preferably, at least two of the pressure-maintaining cylinder, the bottom plate and the test flange are configured as an integrally formed structure; and / or.

[0020] The nuclear power plant generator flange sealing detection device also includes a helium mass spectrometer, and the helium mass spectrometer correspondingly monitors the pressure maintaining device and the generator flange.

[0021] The second aspect of the utility model also provides a nuclear power plant generator, which includes an aviation socket, an aviation plug and the generator flange described in any one of the above technical solutions, the aviation socket is arranged on the generator flange, the aviation socket and the generator flange are sealed by a sealing ring or a sealing gasket, the aviation plug is detachably inserted in the aviation socket, and the pins in the aviation socket are sealed by a glass sintered structure.

[0022] The implementation of this utility model has the following beneficial effects:

[0023] The utility model relates to a nuclear power plant generator flange sealing detection device and a nuclear power plant generator, wherein the nuclear power plant generator flange sealing detection device is used to perform sealing detection on the generator flange on the nuclear power plant generator. In the nuclear power plant generator flange sealing detection device, a test cavity for testing air tightness is formed on the generator flange by a pressure holding device, and the test cavity is pressurized by a pump pressure device, so that the generator flange is tested for sealing by means of the pressurized test cavity.

[0024] In this way, on the one hand, the sealing performance of the flange can be independently evaluated without destroying the original hydrogen sealing pressure-bearing boundary of the generator. This means that maintenance and upgrade work can be carried out in a safer and more controllable environment, reducing unnecessary downtime and costs, while also avoiding emergency shutdowns and safety risks that may be caused by sealing problems found during operation. On the other hand, the utility model can not only perform a sealing test on the surface-to-surface matching position of the generator flange and the generator, but also perform an airtightness test on the plug-in position for setting the wires, so that the position of the poor seal can be quickly located, providing an accurate basis for subsequent repair work and improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0026] Figure 1 It is a schematic diagram of the structure of a nuclear power plant generator flange sealing detection device and a generator flange in some embodiments of the utility model;

[0027] Figure 2 From another perspective Figure 1 The structure diagram of the nuclear power plant generator flange sealing detection device and the generator flange is shown;

[0028] Figure 3It is a cross-sectional view of a nuclear power plant generator flange sealing detection device and a generator flange in some embodiments of the utility model;

[0029] Figure 4 It is an exploded view of a nuclear power plant generator flange sealing detection device and a generator flange in some embodiments of the utility model;

[0030] Figure 5 yes Figure 3 Enlarged view at A. DETAILED DESCRIPTION

[0031] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0032] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0035] Figure 1 and Figure 2 The invention shows a nuclear power plant generator flange sealing detection device 10 in some embodiments of the present invention. The nuclear power plant generator flange sealing detection device 10 is used to perform a sealing test on a generator flange 20, including testing the generator flange 20 (the generator flange 20 is shown in FIG. Figure 1 and Figure 2 ) and the generator housing for mounting the generator flange 20, and also includes the sealing between the generator flange 20 and the components (such as pins, conductive pins or other conductive structures in the prior art) arranged on the generator flange 20, thereby ensuring that after the generator flange 20 is put into daily operation of the nuclear power plant generator, the gas inside the generator will not leak from the outer wall of the generator flange 20 and its own through hole and other structures.

[0036] It should be noted that the generator flange 20 is installed on the generator, and corresponding conductive elements are arranged thereon for conduction or communication.

[0037] like Figure 1 and Figure 2 As shown, the nuclear power plant generator flange sealing detection device 10 includes a pressure maintaining device 1 and a pump pressure device 2, and the pump pressure device 2 is connected to the pressure maintaining device 1. The pressure maintaining device 1 is used to install the generator flange 20 that needs to be tested for air tightness, and the pump pressure device 2 is used to pump gas to the pressure maintaining device 1, so as to perform an air tightness test on the generator flange 20.

[0038] like Figures 1 to 4 As shown, the pressure maintaining device 1 includes a pressure maintaining cylinder 11, a bottom plate 12 and a test flange 13. The bottom plate 12 and the test flange 13 are respectively sealed and connected to the two ends of the pressure maintaining cylinder 11, and the bottom plate 12 closes the end of the pressure maintaining cylinder 11. The test flange 13 is provided with an avoidance hole. The test flange 13 is used to fix the generator flange 20, so that the pressure maintaining cylinder 11, the bottom plate 12 and the test flange 13 jointly define a test cavity 4 on the generator flange 20, and each wiring position 80 on the generator flange 20 is exposed in the test cavity 4 through the avoidance hole 131.

[0039] It can be understood that the pressure-maintaining cylinder 11 is cylindrical in shape as a whole. The bottom plate 12 is used to completely block one end of the pressure-maintaining cylinder 11 to prevent the test gas from overflowing from the connection position between the bottom plate 12 and the pressure-maintaining cylinder 11. The test flange 13 is used to fix the generator flange 20. The plug-in position 80 is used to install components for communication or conduction, such as wiring harnesses, plug pins, conductive pins, and common conductive or communication components in the prior art.

[0040] It should be noted that the connection position between the test flange 13 and the pressure-maintaining cylinder 11 needs to be sealed to prevent the gas used for the sealing test from leaking through the connection position between the two and affecting the airtightness test results. The specific sealing treatment method includes making the test flange 13 and the pressure-maintaining cylinder 11 together in an integrated manner, and sealing the connection position between the two by welding, sealing ring connection or adhesive connection. Of course, other connection methods in the prior art that have the required sealing for the test can also be used. Furthermore, the pressure-maintaining cylinder 11 and the bottom plate 12 also need to ensure sealing and leakage prevention. The connection method between the two can refer to the connection method between the test flange 13 and the pressure-maintaining cylinder 11, and will not be repeated here.

[0041] like Figures 1 to 4 As shown, the pump pressure device 2 includes an air supply pipe 21 and a measuring meter 22 . The measuring meter 22 is arranged on the air supply pipe 21 . The air supply pipe 21 is used to introduce gas into the test chamber 4 to increase the air pressure of the test chamber 4 .

[0042] It can be understood that the gas pipe 21 is used to transmit the test gas. The measuring meter 22 is connected to the test chamber 4 through the gas pipe 21, so that the measuring meter 22 can monitor the pressure in the test chamber 4. In order to smoothly pump the gas into the test chamber 4, the test gas can be pumped into the gas pipe 21 and further pumped into the test chamber 4 by various types of air pumps or air compressors in the prior art.

[0043] It should be noted that the test can be performed using various gases that can be used to test the sealing performance, and the specific settings are determined based on the test cost and test requirements (such as helium and other gases).

[0044] In some embodiments, helium is preferably used as the gas for the leak-tightness test.

[0045] It should be noted that the molecular weight of helium is similar to that of hydrogen in the actual application environment, and helium has a strong penetrating ability, which can better simulate the leakage of hydrogen in actual working conditions and improve the reliability of the test results of the sealing test. In some embodiments of the present invention, the test chamber 4 is located below the generator flange 20 to be tested. Helium, which is lighter than air, has a tendency to diffuse upward in the test chamber 4, so helium is more likely to leak from possible structural defects on the generator flange 20, further improving the test reliability of the sealing test.

[0046] It should also be noted that the leakage of helium can be monitored by a helium mass spectrometer, thereby improving the positioning accuracy of the sealing defect position.

[0047] When in use, after the generator flange 20 is fixed on the test flange 13, each plug-in position 80 on the generator flange 20 will be aligned with the test avoidance hole 131, and the electrical components on each plug-in position 80 will also be aligned with the avoidance hole 131 and exposed in the test cavity 4. At this time, the test surface of the generator flange 20 is closely attached to the surface of the test flange 13, and the two are in surface contact.

[0048] Subsequently, the test gas is pumped into the test chamber 4 through the gas pipe 21, so that the gas in the test chamber 4 has a tendency to overflow, which can fit or simulate the actual working condition of the generator flange 20 on the generator to a certain extent (the nuclear power plant generator will use hydrogen or other gases to cool the iron core during operation), thereby achieving the purpose of airtightness testing.

[0049] Then, when the predetermined test air pressure is reached in the test chamber 4, the gas supply of the gas pipe 21 is stopped, and the pressure change of the test chamber 4 within the predetermined test time is obtained through the reading of the measuring meter 22, and then the pressure change within the predetermined time is used to determine whether the sealing of the generator flange 20 meets the sealing requirements.

[0050] It should also be noted that since the plug-in position 80 on the generator flange 20 is also exposed in the test chamber 4, the sealing performance between the generator flange 20 and the electronic components in the plug-in position 80 will also be tested during the pressurized test to prevent leakage at the plug-in position 80 of the generator flange 20 during actual use.

[0051] In some embodiments, the pressure-maintaining cylinder 11 can be configured into various cylinders with different shapes; for example, cylindrical, prismatic or irregular shapes, as long as it can help form a closed space that can be pressurized during subsequent use.

[0052] In some embodiments, the bottom plate 12 may be configured to be circular, elliptical, triangular, or polygonal. Of course, the bottom plate 12 may also be configured to be just matched with the end of the pressure-maintaining cylinder 11. Furthermore, the bottom plate 12 may also be configured to be larger than the end of the pressure-maintaining cylinder 11, so that the bottom plate 12 can effectively support the pressure-maintaining cylinder 11.

[0053] like Figure 4 and Figure 5 As shown, in some embodiments of the sealing detection device 10, a avoidance groove 132 is further provided on the test flange 13, and the avoidance groove 132 is connected to the avoidance hole 131; wherein the avoidance hole is for the boss 30 on the generator flange 20 to be inserted therein.

[0054] It can be understood that the avoidance groove 132 is used to accommodate the boss 30 to avoid the generator flange 20 from being unable to fully contact the test flange 13 due to the protrusion of the boss 30, so that the sealing surface on the generator flange 20 can fully support the test flange 13.

[0055] It should be noted that the purpose of the sealing test is to test the sealing surface on the generator flange 13, and to test the sealing of the matching position between the surface and the generator. Of course, the sealing of the plug-in position 80 will also be tested at the same time.

[0056] Furthermore, a chamfer 40 is provided on the boss 30, and the chamfer 40 serves to guide the alignment installation and improve the installation convenience of the product.

[0057] like Figure 5 As shown, in some embodiments of the sealing detection device 10 , the groove depth D1 of the avoidance groove 132 is greater than or equal to the height H1 of the boss 30 .

[0058] It can be understood that, through the arrangement of this type of embodiment, it can be ensured that the boss 30 can be fully accommodated in the avoidance groove 132.

[0059] like Figure 3 and Figure 4 As shown, in some embodiments of the sealing detection device 10 , a sealing flange surface 133 is provided on the top surface of the test flange 13 , and the sealing flange surface 133 is used for sealing against the generator flange 20 .

[0060] It can be understood that the sealing flange surface 133 is used to abut against the sealing surface on the generator flange 20. During the test, the sealing performance between the sealing flange surface 133 and the generator flange 20 will be tested. The sealing flange surface 133 is used to simulate the surface of the position on the actual generator for installing the generator flange.

[0061] Specifically, in some embodiments of the sealing detection device 10 , Ra of the sealing flange surface 133 is less than 1.6 μm.

[0062] It can be understood that by setting the surface roughness of the sealing flange surface 133 to the numerical range of this embodiment, the surface of the actual generator can be more effectively simulated, the degree of simulation of the air tightness test can be improved, and the authenticity of the air tightness test results can be ensured.

[0063] like Figure 1 and Figure 2 As shown, in some embodiments of the sealing detection device 10 , the pump pressure device 2 also includes a stop valve 23 , which is disposed on the gas supply pipe 21 , and the gas flows to the measuring meter 22 and the test chamber 4 through the stop valve 23 .

[0064] It can be understood that the stop valve 23 is used to control the on-off of the gas pipe 21; when the stop valve 23 is in the cut-off state, the gas source and the test chamber 4 cannot be connected through the gas pipe 21. At this time, the measuring meter 22 is still connected to the test chamber 4 through the gas pipe 21, so that the data changes of the measuring meter 22 per unit time can be used to determine whether the air tightness of the generator flange 20 currently being tested meets the predetermined air tightness standard.

[0065] It should be noted that the stop valve 23 may be any valve structure used in gas pipelines in the prior art and capable of controlling the flow of gas.

[0066] Specifically, in some embodiments of the sealing detection device 10, the measuring gauge includes a temperature gauge and / or a pressure gauge.

[0067] It is understandable that different test data will be used to determine the air tightness under different test requirements. For example, it may be necessary to determine whether the air tightness meets the standard by the temperature change of the test chamber 4 per unit time (under such test conditions, the measuring meter 22 can be configured as a temperature meter), or it may be necessary to determine whether the air tightness meets the standard by the pressure change of the test chamber 4 per unit time (under such test conditions, the measuring meter 22 can be configured as a pressure gauge).

[0068] Specifically, in some other test requirements, it may be necessary to monitor the pressure and temperature of the test chamber 4 simultaneously to monitor the air tightness, that is, it is necessary to determine whether the air tightness meets the standard by the pressure value change and the temperature change of the test chamber 4. In this way, the measuring meter may include a temperature and pressure integrated meter in some embodiments.

[0069] like Figure 1 and Figure 4As shown, in some embodiments of the sealing detection device 10, the nuclear power plant generator flange sealing detection device 10 also includes a connecting device 3; it can be understood that the connecting device 3 is used to connect the generator flange 20 and the test flange 13, and the connecting device 3 can apply a certain pressure.

[0070] The connecting device 3 can be configured in at least the following embodiments:

[0071] In the first embodiment, the connection device 3 includes a plurality of connection bolts 31 , each of which is passed through the generator flange 20 , and each of which is threadedly connected to the test flange 13 .

[0072] It can be understood that in this type of embodiment, the generator flange 20 is provided with through holes for the connecting bolts 31 to pass through, and the test flange 13 is provided with threaded holes. The generator flange 20 can be fixed on the test flange 13 by passing the connecting bolts 31 through the through holes on the generator flange 20 one by one, and the connecting bolts 31 are screwed to the threaded holes on the test flange 13 one by one, so as to enclose the test cavity 4.

[0073] In the second embodiment, the connecting device 3 includes a plurality of connecting bolts 31 and a plurality of connecting nuts 32 , each connecting bolt 31 penetrates the generator flange 20 and the test flange 13 , and each connecting bolt 31 is threadedly connected to each connecting nut 32 one by one.

[0074] It can be understood that in this type of embodiment, through holes for connecting bolts 31 to pass through are provided on the generator flange 20, and through holes are also provided on the test flange 13. Each connecting bolt 31 is passed through each through hole on the generator flange 20 in a one-to-one correspondence, and each connecting bolt 31 is passed through each through hole on the test flange 13 in a one-to-one correspondence, and then each connecting bolt 31 is screwed with each connecting nut 32 in a one-to-one correspondence, so that the generator flange 20 can be aligned and fixed on the test flange 13, thereby enclosing the test cavity 4.

[0075] It should be noted that the number of the connecting bolts 31 in the above-mentioned embodiments can be flexibly set, but it depends on the number of holes for fixing on the generator flange 20 .

[0076] Furthermore, the number of the connecting bolts 31 can be configured to be 18.

[0077] Furthermore, each connection bolt 31 is preferably configured to be symmetrically distributed along the center of the generator flange 20. In this way, the locking force of each connection bolt can be evenly distributed to each position.

[0078] like Figure 1 and Figure 2As shown, in some embodiments of the sealing detection device 10, at least two of the pressure-maintaining cylinder 11, the bottom plate 12 and the test flange 13 are configured as an integrally formed structure. It can be understood that this type of embodiment can include at least the following implementation methods:

[0079] In the first embodiment, the pressure-maintaining cylinder 11 and the bottom plate 12 are made by integral molding;

[0080] In the second embodiment, the pressure-maintaining cylinder 11 and the test flange 13 are made by integral molding;

[0081] In the third embodiment, the base plate 12 and the test flange 13 are made by integral molding;

[0082] In the fourth embodiment, the pressure-maintaining cylinder 11 , the bottom plate 12 and the test flange 13 are configured together to be manufactured in an integral molding manner.

[0083] It should be noted that, in the above-mentioned embodiments, the one-piece molding arrangement can improve the sealing performance of each component at the contact position, thereby preventing the airtightness of the pressure-maintaining device 1 from being insufficient and causing errors in the airtightness test of the generator flange 20 .

[0084] In some embodiments of the sealing detection device 10, the nuclear power plant generator flange sealing detection device further includes a helium mass spectrometer, which corresponds to monitoring the pressure maintaining device and the generator flange.

[0085] It can be understood that the helium mass spectrometer is used to locate the specific position of the leak, so that the leakage position of the generator flange 20 can be accurately located, thereby improving the accuracy of airtightness detection.

[0086] like Figure 1 and Figure 4 As shown, the nuclear power plant generator of the utility model is applied to the field of nuclear power. The nuclear power plant generator comprises an aviation socket, an aviation plug and a generator flange 20. The aviation socket is arranged on the generator flange 20. The aviation socket 50 and the generator flange 20 are sealed by a sealing ring or a sealing gasket. The aviation plug is detachably inserted into the aviation socket 50. The plug pin 60 in the aviation socket 50 is sealed by a glass sintering structure (see the plug pin 60). Figure 1 ).

[0087] Understandably, the setting of aviation sockets enables various cables for conduction or communication to be centrally arranged, which improves the connection stability and effectively protects the cables. Aviation plugs are used to fix the cables outside the nuclear power plant generator, so that the cables outside the power plant can be classified and bundled, and of course, the external cables can also be protected.

[0088] The provision of a sealing ring or a sealing gasket can prevent gas leakage through the matching position of the aviation socket and the generator flange 20, thereby improving the sealing of the product. After the aviation plug is correspondingly inserted into the aviation socket 50, the cables outside the generator will be correspondingly connected to the cables inside the generator.

[0089] The plug pin 60 is configured to be sealed by a glass sintered structure, which can improve the sealing between the plug pin 60 and the aviation socket 50 and prevent gas from leaking through the mating position between the plug pin 60 and the aviation socket 50.

[0090] The implementation of this utility model has the following beneficial effects:

[0091] The utility model relates to a nuclear power plant generator flange sealing detection device and a nuclear power plant generator, wherein the nuclear power plant generator flange sealing detection device is used to perform sealing detection on the generator flange on the nuclear power plant generator. In the nuclear power plant generator flange sealing detection device, a test cavity for testing air tightness is formed on the generator flange by a pressure holding device, and the test cavity is pressurized by a pump pressure device, so that the generator flange is tested for sealing by means of the pressurized test cavity.

[0092] In this way, on the one hand, the sealing performance of the flange can be independently evaluated without destroying the original hydrogen sealing pressure-bearing boundary of the generator. This means that maintenance and upgrade work can be carried out in a safer and more controllable environment, reducing unnecessary downtime and costs, while also avoiding emergency shutdowns and safety risks that may be caused by sealing problems found during operation. On the other hand, the utility model can not only perform a sealing test on the surface-to-surface matching position of the generator flange and the generator, but also perform an airtightness test on the plug-in position for setting the wires, so that the position of the poor seal can be quickly located, providing an accurate basis for subsequent repair work and improving maintenance efficiency.

[0093] The scheme of the utility model has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. Those skilled in the art should also know that the actions and modules involved in the specification are not necessarily required for the utility model. In addition, it can be understood that the steps in the method of the embodiment of the utility model can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the utility model can be merged, divided and deleted according to actual needs.

[0094] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A nuclear power plant generator flange sealing detection device, characterized in that: include: A pressure-maintaining device (1) comprises a pressure-maintaining cylinder (11), a bottom plate (12) and a test flange (13), wherein the bottom plate (12) and the test flange (13) are respectively sealed and connected to the two ends of the pressure-maintaining cylinder (11), and the bottom plate (12) closes the end of the pressure-maintaining cylinder (11), and an avoidance hole (131) is provided on the test flange (13), and the test flange (13) is used to fix a generator flange (20), so that the pressure-maintaining cylinder (11), the bottom plate (12) and the test flange (13) jointly define a test cavity (4) on the generator flange (20), and each wiring insertion position (80) on the generator flange (20) is exposed in the test cavity (4) through the avoidance hole (131); and The pump pressure device (2) comprises an air supply pipe (21) and a measuring meter (22), wherein the measuring meter (22) is arranged on the air supply pipe (21), and the air supply pipe (21) is used to introduce gas into the test chamber (4) to increase the air pressure of the test chamber (4).

2. The nuclear power plant generator flange sealing detection device according to claim 1, characterized in that: The test flange (13) is also provided with a position-avoiding groove (132), and the position-avoiding groove (132) is connected to the position-avoiding hole (131); The avoidance hole (131) is used for the boss (30) on the generator flange (20) to be inserted therein.

3. The nuclear power plant generator flange sealing detection device according to claim 2, characterized in that: The depth of the avoidance groove (132) is greater than or equal to the height of the boss (30).

4. The nuclear power plant generator flange sealing detection device according to claim 1 or 2, characterized in that: The top surface of the test flange (13) is provided with a sealing flange surface (133), and the sealing flange surface (133) is used for sealing against the generator flange (20).

5. The nuclear power plant generator flange sealing detection device according to claim 4, characterized in that: The sealing flange surface (133) has a Ra value less than 1.6 μm.

6. The nuclear power plant generator flange sealing detection device according to claim 1, characterized in that: The pump pressure device (2) further comprises a stop valve (23), wherein the stop valve (23) is arranged on the gas transmission pipe (21), and the gas flows into the measuring meter (22) and the test chamber (4) via the stop valve (23).

7. The nuclear power plant generator flange sealing detection device according to claim 1 or 6, characterized in that: The measuring meter (22) comprises a temperature meter and / or a pressure meter; or The measuring meter (22) comprises an integrated temperature and pressure meter.

8. The nuclear power plant generator flange sealing detection device according to claim 1, characterized in that: The nuclear power plant generator flange sealing detection device also includes a connecting device (3); Wherein, the connecting device (3) comprises a plurality of connecting bolts (31), each of the connecting bolts (31) is passed through the generator flange (20), and each of the connecting bolts (31) is screwed onto the test flange (13); or The connecting device (3) comprises a plurality of connecting bolts (31) and a plurality of connecting nuts (32), each of the connecting bolts (31) is passed through the generator flange (20) and the test flange (13), and each of the connecting bolts (31) is threadedly connected to each of the connecting nuts (32) in a one-to-one correspondence.

9. The nuclear power plant generator flange sealing detection device according to claim 1, characterized in that: At least two of the pressure-maintaining cylinder (11), the bottom plate (12) and the test flange (13) are configured as an integrally formed structure; and / or The nuclear power plant generator flange sealing detection device further comprises a helium mass spectrometer, and the helium mass spectrometer correspondingly monitors the pressure maintaining device (1) and the generator flange (20).

10. A nuclear power plant generator, characterized in that: The nuclear power plant generator comprises an aviation socket (50), an aviation plug and a generator flange (20) as claimed in any one of claims 1 to 9, wherein the aviation socket (50) is arranged on the generator flange (20), and the aviation socket (50) and the generator flange (20) are sealed by a sealing ring or a sealing gasket, the aviation plug is detachably inserted in the aviation socket (50), and the pin (60) in the aviation socket (50) is sealed by a glass sintering structure.

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