Generator sleeve flange sealing performance detection tool

Abstract

The utility model discloses a tool for detecting the sealing performance of a casing flange of a generator. The tool comprises an annular seat, a first sealing rubber strip and a second sealing rubber strip, the annular seat is of a sectional type connecting structure along the circumferential direction, so that the annular seat can be conveniently sleeved between the inner circumferential wall of a sleeve mounting hole of the generator wire outlet cover and the outer circumferential wall of a sleeve; a through gas injection hole is formed in the annular seat; the first sealing rubber strip is used for being installed and connected between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the annular base in an abutting mode. The second sealing rubber strip is used for being installed and connected between the inner circumferential wall of the annular base and the outer circumferential wall of the sleeve in an abutting mode, namely, an annular sealing structure is formed between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the sleeve, and the space defined by the annular sealing structure, the inner circumferential wall of the sleeve installation hole, the outer circumferential wall of the sleeve and the flange is a sealing cavity. Gas with a certain air pressure is injected into the sealing cavity through the gas injection hole, and then whether gas leakage occurs on the outer end face of the flange is detected through the gas detector, so that the sealing performance of the sleeve flange can be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of generators, and particularly relates to a detection tool for the sealing performance of a generator sleeve flange. Background Art

[0002] The TA1100-78 type steam turbine generator is produced by Dongfang Electric Machinery Co., Ltd. The 6 outlet sleeves used in it are produced by French legend, with the model of VFH 24 / 73.5-33. The outlet sleeve is an important boundary for the internal hydrogen and GST water sealing of the generator.

[0003] Among them, the generator outlet cover is provided with a sleeve mounting hole. The sleeve (i.e., the outlet sleeve) passes through the sleeve mounting hole of the outlet cover. The flange is sleeved on the sleeve and installed on the outer end surface of the sleeve mounting hole. Moreover, a sealing ring is installed between the outer end surface of the sleeve mounting hole and the flange, so as to fix and seal the passing section (middle section) of the sleeve.

[0004] However, after the sealing ring of the sleeve flange is replaced, there is no tool to detect the sealing performance of the flange, which brings inconvenience to the detection of the sealing performance of the flange. Content of the Utility Model

[0005] In view of this, the utility model provides a detection tool for the sealing performance of a generator sleeve flange, which can help to detect the sealing performance of the sleeve flange.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A detection tool for the sealing performance of a generator sleeve flange, comprising: an annular seat, a first sealing strip and a second sealing strip;

[0008] The annular seat is a segmented connection structure along the circumferential direction and is used to be sleeved between the inner circumferential wall of the sleeve mounting hole of the generator outlet cover and the outer circumferential wall of the sleeve; wherein, the annular seat is provided with a through gas injection hole;

[0009] The first sealing strip is used to be installed and abutted between the inner circumferential wall of the sleeve mounting hole and the outer circumferential wall of the annular seat; the second sealing strip is used to be installed and abutted between the inner circumferential wall of the annular seat and the outer circumferential wall of the sleeve.

[0010] Preferably, the annular seat includes: an upper annular seat, a lower annular seat and a locking assembly;

[0011] The upper annular seat and the lower annular seat are both segmented connection structures along the circumferential direction and are respectively used to be sleeved between the inner circumferential wall of the sleeve mounting hole and the outer circumferential wall of the sleeve; wherein, the gas injection hole penetrates through the upper annular seat and the lower annular seat;

[0012] The first sealing strip is installed between the lower outer peripheral edge of the upper annular seat and the upper outer peripheral edge of the lower annular seat; the second sealing strip is installed between the lower inner peripheral edge of the upper annular seat and the upper inner peripheral edge of the lower annular seat;

[0013] The locking assembly is used to lock the upper annular seat to the lower annular seat, and during the locking process, it squeezes the first sealing strip and the second sealing strip, so that the first sealing strip extends radially to abut and cooperate with the inner peripheral wall of the sleeve installation hole, and the second sealing strip extends radially to abut and cooperate with the outer peripheral wall of the sleeve.

[0014] Preferably, an annular positioning groove is formed in the middle part of the lower end face of the upper annular seat;

[0015] An annular positioning projection is provided in the middle part of the upper end face of the lower annular seat and is used to cooperate with the annular positioning groove; wherein, both the annular positioning projection and the annular positioning groove are of a segmented mating structure in the circumferential direction;

[0016] The first sealing strip is wound around the first part of the upper end face of the lower annular seat and contacts the outer peripheral wall of the annular positioning projection; the second sealing strip is wound around the second part of the upper end face of the lower annular seat and contacts the inner peripheral wall of the annular positioning projection.

[0017] Preferably, an air nozzle is further included;

[0018] The air injection hole on the upper annular seat is a first through hole, and the air injection hole on the lower annular seat is a first internal thread hole;

[0019] The air outlet end of the air nozzle passes through the first through hole of the upper annular seat and is screwed tightly into the first internal thread hole of the lower annular seat; wherein, the air inlet end of the air nozzle is used for injecting helium.

[0020] Preferably, the upper annular seat is provided with a plurality of second through holes;

[0021] A plurality of second internal thread holes are formed in the upper end face of the lower annular seat, and the plurality of second through holes and the plurality of second internal thread holes are vertically aligned one by one;

[0022] The locking assembly includes: a plurality of locking bolts;

[0023] The plurality of locking bolts respectively pass through the plurality of second through holes of the upper annular seat and are respectively screwed tightly into the plurality of second internal thread holes of the lower annular seat.

[0024] Preferably, the lower end face of the lower annular seat is provided with a plurality of legs and is used for resting on the inner end face of the flange.

[0025] Preferably, the upper annular seat is a two-piece connection structure in the circumferential direction, and includes: a first upper semi-annular seat and a second upper semi-annular seat that are joined together;

[0026] The lower annular seat is a two-piece connection structure in the circumferential direction, and includes: a first lower semi-annular seat and a second lower semi-annular seat that are joined together.

[0027] Preferably, a pressing assembly is further included;

[0028] The pressing assembly is used to be installed inside the generator outgoing line cover, and is used to press the upper end face of the annular seat.

[0029] Preferably, the pressing assembly includes: a first pressing assembly and a second pressing assembly;

[0030] The first pressing assembly and the second pressing assembly are respectively used to be installed between two reinforcing ribs inside the generator outgoing line cover, and are distributed on both sides of the sleeve, and are respectively used to press the upper end face of the annular seat.

[0031] Preferably, both the first pressing assembly and the second pressing assembly include: a support rod assembly and a pressing rod;

[0032] The support rod assembly is used to be installed across between two reinforcing ribs inside the generator outgoing line cover; the pressing rod is arranged on the support rod assembly, and is used to press the upper end face of the annular seat.

[0033] It can be seen from the above technical solutions that in the generator sleeve flange sealing performance detection tooling provided by the present utility model, the annular seat is a segmented connection structure in the circumferential direction, which is convenient for being sleeved between the inner peripheral wall of the sleeve mounting hole of the generator outgoing line cover and the outer peripheral wall of the sleeve, and sealing rubber strips are installed and abutted between the inner peripheral wall of the sleeve mounting hole and the outer peripheral wall of the annular seat, and between the inner peripheral wall of the annular seat and the outer peripheral wall of the sleeve, which can form a seal between the outer peripheral wall of the annular seat and the inner peripheral wall of the sleeve mounting hole, and form a seal between the inner peripheral wall and the outer peripheral wall of the sleeve, that is, form an annular sealing structure between the inner peripheral wall of the sleeve mounting hole and the outer peripheral wall of the sleeve, and further make the space enclosed by the annular sealing structure, the inner peripheral wall of the sleeve mounting hole, the outer peripheral wall of the sleeve and the flange a sealed chamber, then inject gas with a certain air pressure into this sealed chamber through the air injection hole, and then detect whether gas leaks from the outer end face of the flange through a gas detector, so as to realize the detection of the sealing performance of the sleeve flange. Description of the Drawings

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 Structural schematic diagram of the generator sleeve flange sealing detection tooling provided by the embodiment of the present invention;

[0036] Figure 2 Top view of the structural of the generator sleeve flange sealing detection tooling provided by the embodiment of the present invention;

[0037] Figure 3 is Figure 1 A-A cross-sectional view of;

[0038] Figure 4 Top view of the structural of the upper annular seat provided by the embodiment of the present invention;

[0039] Figure 5 is Figure 4 A-A cross-sectional view of;

[0040] Figure 6 is Figure 5 Partial enlarged view of;

[0041] Figure 7 is Figure 4 View from direction A of;

[0042] Figure 8 Top view of the structural of the lower annular seat provided by the embodiment of the present invention;

[0043] Figure 9 is Figure 8 A-A cross-sectional view of;

[0044] Figure 10 is Figure 9 Partial enlarged view of;

[0045] Figure 11 is Figure 8 View from direction A of;

[0046] Figure 12 Structural schematic diagram of the air nozzle provided by the embodiment of the present invention;

[0047] Figure 13 Top view of the structural of the air nozzle provided by the embodiment of the present invention;

[0048] Figure 14Installation schematic diagram of the pressing component provided by the embodiment of the present utility model.

[0049] Among them, 1 is the lower annular seat, 11 is the first lower half-annular seat, 12 is the second lower half-annular seat, 13 is the annular positioning convex, 14 is the hoisting nut, 111 is the first internal thread hole, 112 is the second internal thread hole, 2 is the upper annular seat, 21 is the first upper half-annular seat, 22 is the second upper half-annular seat, 23 is the annular positioning groove, 211 is the first through hole, 212 is the second through hole, 3 is the locking bolt, 4 is the screw, 5 is the first sealing strip, 6 is the second sealing strip, 7 is the leg, 8 is the support rod assembly, 81 is the support rod, 82 is the adjusting nut, 83 is the support foot, 9 is the pressing rod, 10 is the air nozzle, 101 is the joint, 102 is the adapter, and 200 is the reinforcing rib. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0051] The generator bushing flange sealing performance detection tooling provided by the embodiment of the present utility model, as Figures 1 to 3 shown, includes: an annular seat, a first sealing strip 5 and a second sealing strip 6;

[0052] The annular seat is a segmented connection structure along the circumferential direction and is used to be sleeved between the inner peripheral wall of the bushing installation hole of the generator outgoing line cover and the outer peripheral wall of the bushing; among them, the annular seat is provided with a through air injection hole;

[0053] The first sealing strip 5 is used to be installed and abutted between the inner peripheral wall of the bushing installation hole and the outer peripheral wall of the annular seat; the second sealing strip 6 is used to be installed and abutted between the inner peripheral wall of the annular seat and the outer peripheral wall of the bushing.

[0054] It should be noted that the annular seat has a segmented mating connection structure in the circumferential direction, that is, the annular seat is divided into multiple arc-shaped structures in the circumferential direction. After the multiple arc-shaped structures are mated and connected, the annular seat can be formed, which is convenient for the annular seat to be sleeved between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the sleeve. Among them, the annular seat can have a two-segment mating connection structure or a three-segment mating connection structure in the circumferential direction, and the air injection holes of the annular seat penetrate through its two end faces; the first sealing strip 5 is used to be installed and abutted between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the annular seat, and the second sealing strip 6 is used to be installed and abutted between the inner circumferential wall of the annular seat and the outer circumferential wall of the sleeve, so as to form an outer sealing ring structure between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the annular seat, and an inner sealing ring structure between the inner circumferential wall of the annular seat and the outer circumferential wall of the sleeve, that is, a ring-shaped sealing structure is formed between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the sleeve. In this way, the space enclosed by the ring-shaped sealing structure, the inner circumferential wall of the sleeve installation hole, the outer circumferential wall of the sleeve and the flange can be a sealed chamber. Then, a certain air pressure (which can be 3 bar) of gas is injected into this sealed chamber through the air injection holes of the annular seat, and then it is detected by a gas detector whether there is gas leakage on the outer end face (lower end face) of the flange, so as to detect the sealing performance of the sleeve flange;

[0055] In addition, the air injection holes can be helium air injection holes, and correspondingly, the gas detector can be a helium mass spectrometer leak detector; and this detection tooling is applicable to the detection of the sealing performance of the flange of the generator sleeve VFH 24 / 73.5 - 33 and is located inside the generator outgoing line cover; of course, a pressure sensor can also be provided in the sealed chamber to monitor whether the air pressure in the sealed chamber changes after air injection, so as to judge whether there is gas leakage on the outer end face of the flange.

[0056] That is to say, in the generator sleeve flange sealing performance detection tooling provided by this solution, the annular seat has a segmented connection structure in the circumferential direction, which is convenient for being sleeved between the inner circumferential wall of the sleeve installation hole of the generator outgoing line cover and the outer circumferential wall of the sleeve. Moreover, sealing strips are installed and abutted between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the annular seat, and between the inner circumferential wall of the annular seat and the outer circumferential wall of the sleeve. This can make the outer circumferential wall of the annular seat form a seal with the inner circumferential wall of the sleeve installation hole, and the inner circumferential wall form a seal with the outer circumferential wall of the sleeve, that is, a ring-shaped sealing structure is formed between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the sleeve. Furthermore, the space enclosed by the ring-shaped sealing structure, the inner circumferential wall of the sleeve installation hole, the outer circumferential wall of the sleeve and the flange is a sealed chamber. Then, a certain air pressure of gas is injected into this sealed chamber through the air injection holes, and then it is detected by a gas detector whether there is gas leakage on the outer end face of the flange, so as to detect the sealing performance of the sleeve flange. Of course, the sealing performance of the flange can be detected by this detection tooling immediately after the sleeve flange sealing ring is replaced. If the sealing performance is unqualified, the sealing ring of the flange can be adjusted and replaced in time.

[0057] In this solution, as Figure 3 shown, the annular seat includes: an upper annular seat 2, a lower annular seat 1, and a locking assembly;

[0058] The upper annular seat 2 and the lower annular seat 1 are both segmented connection structures in the circumferential direction, and are respectively used to be sleeved between the inner circumferential wall of the casing installation hole and the outer circumferential wall of the casing; wherein, the gas injection hole penetrates through the upper annular seat 2 and the lower annular seat 1;

[0059] The first sealing rubber strip 5 is installed between the lower outer peripheral edge of the upper annular seat 2 and the upper outer peripheral edge of the lower annular seat 1; the second sealing rubber strip 6 is installed between the lower inner peripheral edge of the upper annular seat 2 and the upper inner peripheral edge of the lower annular seat 1;

[0060] The locking assembly is used to lock the upper annular seat 2 to the lower annular seat 1, and during the locking process, it squeezes the first sealing rubber strip 5 and the second sealing rubber strip 6, so that the first sealing rubber strip 5 extends radially to abut and cooperate with the inner circumferential wall of the casing installation hole, and the second sealing rubber strip 6 extends radially to abut and cooperate with the outer circumferential wall of the casing.

[0061] It should be noted that the annular seat is a two-layer structure, that is, it is divided into an upper annular seat 2 and a lower annular seat 1. Moreover, as described above, the upper annular seat 2 is a segmented mating connection structure in the circumferential direction, that is, the upper annular seat 2 is divided into multiple arc-shaped structures in the circumferential direction. After the multiple arc-shaped structures are mated and connected, the upper annular seat 2 can be formed, which is convenient for the upper annular seat 2 to be sleeved between the inner circumferential wall of the casing installation hole and the outer circumferential wall of the casing; similarly, the lower annular seat 1 is a segmented mating connection structure in the circumferential direction, that is, the lower annular seat 1 is divided into multiple arc-shaped structures in the circumferential direction. After the multiple arc-shaped structures are mated and connected, the lower annular seat 1 can be formed, which is convenient for the lower annular seat 1 to be sleeved between the inner circumferential wall of the casing installation hole and the outer circumferential wall of the casing; of course, the lower annular seat 1 is located below the upper annular seat 2, and the upper annular seat 2 and the lower annular seat 1 can both be two-segment mating connection structures or three-segment mating connection structures in the circumferential direction;

[0062] The first sealing rubber strip 5 is installed between the lower outer peripheral edge (the outer peripheral edge of the lower end face) of the upper annular seat 2 and the upper outer peripheral edge (the outer peripheral edge of the upper end face) of the lower annular seat 1; the second sealing rubber strip 6 is installed between the lower inner peripheral edge (the inner peripheral edge of the lower end face) of the upper annular seat 2 and the upper inner peripheral edge (the inner peripheral edge of the upper end face) of the lower annular seat 1; of course, the first sealing rubber strip 5 and the second sealing rubber strip 6 will undergo elastic deformation when being squeezed;

[0063] During the process of locking the upper annular seat 2 to the lower annular seat 1 by the locking assembly, the upper annular seat 2 and the lower annular seat 1 will jointly press the first sealing strip 5 and the second sealing strip 6, so that the first sealing strip 5 extends radially (i.e., elastically deforms radially) to abut and cooperate with the inner peripheral wall of the sleeve installation hole, and the second sealing strip 6 extends radially (i.e., elastically deforms radially) to abut and cooperate with the outer peripheral wall of the sleeve. That is, the first sealing strip 5 is closely attached to the inner peripheral wall of the sleeve installation hole, and the second sealing strip 6 is closely attached to the outer peripheral wall of the sleeve, thereby forming a full and tight sealing effect between the inner peripheral wall of the sleeve installation hole and the outer peripheral wall of the annular seat, and between the inner peripheral wall of the annular seat and the outer peripheral wall of the sleeve. Among them, the first sealing strip 5 and / or the second sealing strip 6 can adopt a sealing strip with a circular cross-section of φ7mm.

[0064] Specifically, as Figure 4 and Figure 5 shown, an annular positioning groove 23 is provided in the middle part of the lower end surface of the upper annular seat 2;

[0065] As Figure 8 and Figure 9 shown, an annular positioning projection 13 is provided in the middle part of the upper end surface of the lower annular seat 1 and is used to cooperate with the annular positioning groove 23; among them, the annular positioning projection 13 and the annular positioning groove 23 are both segmented mating structures in the circumferential direction;

[0066] As Figure 3 shown, the first sealing strip 5 is wound around the first part of the upper end surface of the lower annular seat 1 and contacts the outer peripheral wall of the annular positioning projection 13; the second sealing strip 6 is wound around the second part of the upper end surface of the lower annular seat 1 and contacts the inner peripheral wall of the annular positioning projection 13.

[0067] It should be noted that, as described above, the upper annular seat 2 and the lower annular seat 1 are both segmented connection structures in the circumferential direction. Correspondingly, the annular positioning projection 13 is also a segmented structure in the circumferential direction and can be mated to form an annular positioning projection, and the annular positioning groove 23 is also a segmented structure in the circumferential direction and can be mated to form an annular positioning groove, so as to facilitate the upper annular seat 2 and the lower annular seat 1 to be respectively sleeved between the inner peripheral wall of the sleeve installation hole and the outer peripheral wall of the sleeve; as Figure 8 shown, for example, the lower annular seat 1 is a two-segment connection structure in the circumferential direction and includes: a first lower half-annular seat 11 and a second lower half-annular seat 12 that are butted and connected. Then, the annular positioning projection 13 is also a two-segment mating structure in the circumferential direction and includes: a first semi-annular positioning projection and a second semi-annular positioning projection. The first semi-annular positioning projection and the second semi-annular positioning projection are respectively provided in the middle part of the upper end surfaces of the first lower half-annular seat and the second lower half-annular seat; of course, the height of the annular positioning projection 13 needs to match the depth of the annular positioning groove 23;

[0068] Among them, the first part of the upper end surface of the lower annular seat 1 can be the outer ring of the upper end surface of the lower annular seat 1 (covering the upper outer peripheral edge), the middle part can be the middle ring of the upper end surface of the lower annular seat 1, and the second part can be the inner ring of the upper end surface of the lower annular seat 1 (covering the upper inner peripheral edge); that is to say, the first sealing strip 5 can be wound around the outer ring of the upper end surface of the lower annular seat 1 and contact the outer peripheral wall of the annular positioning convex 13, and the second sealing strip 6 can be wound around the inner ring of the upper end surface of the lower annular seat 1 and contact the inner peripheral wall of the annular positioning convex 13. In this way, on the one hand, it can limit the inner peripheral wall of the first sealing strip 5, and then under the extrusion of the upper annular seat 2 and the lower annular seat 1, the first sealing strip 5 can be firmly abutted between the inner peripheral wall of the sleeve installation hole and the outer peripheral wall of the annular seat; on the other hand, it can also limit the inner peripheral wall of the second sealing strip 6, and then under the extrusion of the upper annular seat 2 and the lower annular seat 1, the second sealing strip 6 can be firmly abutted between the inner peripheral wall of the annular seat and the outer peripheral wall of the sleeve, so as to form a full, tight and stable sealing structure between the inner peripheral wall of the sleeve installation hole and the outer peripheral wall of the sleeve.

[0069] Further, as Figure 1 shown, the generator sleeve flange sealing performance detection tooling provided by the embodiment of the present utility model further includes a gas nozzle 10;

[0070] As Figure 4 shown, the air injection hole on the upper annular seat 2 is the first through hole 211, and as Figure 8 shown, the air injection hole on the lower annular seat 1 is the first internal thread hole 111;

[0071] As Figure 1 shown, the air outlet end of the gas nozzle 10 passes through the first through hole 211 of the upper annular seat 2 and is tightened in the first internal thread hole 111 of the lower annular seat 1; among them, the air inlet end of the gas nozzle 10 is used for injecting helium gas.

[0072] It should be noted that the upper end of the gas nozzle 10 is the air inlet end, the lower end is the air outlet end, the outer peripheral wall of the air outlet end of the gas nozzle 10 is provided with an external thread, and it is used to cooperate with the first internal thread hole 111 of the lower annular seat 1 to realize the fastening of the air outlet end of the gas nozzle 10 and the first internal thread hole 111 of the lower annular seat 1; in addition, as Figure 12 shown, the gas nozzle 10 includes: a joint 101 and a swivel joint 102; among them, the lower end (air outlet end) of the joint 101 is screwed to the upper end (air inlet end) of the swivel joint 102, the upper end (air inlet end) of the joint 101 is used to connect with the trachea of the helium gas cylinder, and the lower end (air outlet end) of the swivel joint 102 is used to be screwed to the first internal thread hole 111 of the lower annular seat 1.

[0073] That is to say, by adding the nozzle 10 to the air injection hole of the annular seat in this detection tooling, it is not only convenient to inject helium gas with a certain air pressure into the sealing chamber. Then, after injecting helium gas with a certain air pressure, it is possible to further detect whether there is helium gas leakage on the outer end face of the flange through a helium mass spectrometer leak detector, so as to facilitate the detection of the sealing performance of the casing flange. Moreover, it can also prevent the gap between the upper annular seat 2 and the lower annular seat 1 from being used as an air path. For example, it can prevent the gap between the annular positioning convex 13 and the annular positioning groove 23 from being used as an air path.

[0074] Furthermore, as Figure 4 shown, the upper annular seat 2 is provided with a plurality of second through holes 212;

[0075] As Figure 8 shown, a plurality of second internal threaded holes 112 are formed on the upper end face of the lower annular seat 1, and the plurality of second through holes 212 are vertically aligned with the plurality of second internal threaded holes 112 one by one;

[0076] As Figure 1 and Figure 2 shown, the locking assembly includes: a plurality of locking bolts 3;

[0077] The plurality of locking bolts 3 respectively pass through the plurality of second through holes 212 of the upper annular seat 2 and are respectively tightened in the plurality of second internal threaded holes 112 of the lower annular seat 1.

[0078] Among them, as Figure 4 shown, the second through holes 212 penetrate through the upper end face and the lower end face of the upper annular seat 2. The plurality of second through holes 212 can be all located in the middle part (middle circle) of the upper end face of the upper annular seat 2 and are evenly distributed along the circumferential direction of the upper annular seat 2; similarly, the plurality of second through holes 212 can be evenly distributed along the circumferential direction of the lower annular seat 1; of course, the second through holes 212 are vertically aligned with the corresponding second internal threaded holes 112, so that it is convenient for the locking bolts 3 to pass through the second through holes 212 of the upper annular seat 2 and then be tightened in the corresponding second internal threaded holes 112 of the lower annular seat 1.

[0079] That is to say, the upper annular seat 2 is locked to the lower annular seat 1 by a plurality of locking bolts 3. During the locking process or the tightening process, the upper annular seat 2 and the lower annular seat 1 can jointly press the first sealing strip 5 and the second sealing strip 6. This locking method has a simple structure, is convenient and reliable for locking, and at the same time makes this tooling simple, practical and reliable in operation.

[0080] In this solution, as Figure 9As shown, multiple legs 7 are provided on the lower end surface of the lower annular seat 1 and are used to rest on the inner end surface of the flange (actually rest on the sealing ring). In this way, it is used to lift the height between the inner peripheral wall of the casing installation hole and the outer peripheral wall of the casing of the annular sealing structure (this tooling), and then the space of the sealing chamber can be increased, so that the gas in the sealing chamber can reach a certain air pressure. Among them, the legs 7 can be selected as vertical support rods. Multiple vertical support rods can be evenly distributed along the circumferential direction of the lower annular seat 1, and their upper ends can be welded to the lower end surface of the lower annular seat 1, and the lower ends are used to rest on the inner end surface of the flange.

[0081] Specifically, as Figure 4 shown, the upper annular seat 2 is a two-piece connection structure along the circumferential direction, and includes: a first upper half annular seat 21 and a second upper half annular seat 22 that are joined together;

[0082] As Figure 8 shown, the lower annular seat 1 is a two-piece connection structure along the circumferential direction, and includes: a first lower half annular seat 11 and a second lower half annular seat 12 that are joined together. That is to say, both the upper annular seat 2 and the lower annular seat 1 are two-piece joined connection structures along the circumferential direction. In this way, the structure of the annular seat can be simple and the sleeving can be convenient.

[0083] It should be noted that the joining of the first upper half annular seat 21 and the second upper half annular seat 22 can adopt the form of lapping and joining; among them, as Figure 4 and Figure 7 shown, lap grooves are provided at the upper parts of the two joining end faces of the first upper half annular seat 21 and penetrate through the upper end surface of the first upper half annular seat 21; lap blocks are provided at the upper parts of the two joining end faces of the second upper half annular seat 22 and are used to lap and join with the two lap grooves of the first upper half annular seat 21 one by one; of course, at the two joining and lapping places of the first upper half annular seat 21 and the second upper half annular seat 22, fastening can be achieved through the locking bolts 3, that is, the lap blocks of the second upper half annular seat 22 are locked with the lap grooves of the first upper half annular seat 21 through the locking bolts 3. In this way, the connection after the joining of the first lower half annular seat 11 and the second lower half annular seat 12 can be simpler and more convenient;

[0084] In addition, as Figure 8 and Figure 11As shown, the connection after the first lower half - annular seat 11 and the second lower half - annular seat 12 are joined together can adopt the form of built - in tangential connection. Among them, internal threaded holes can be provided on both mating end faces of the first lower half - annular seat 11, and the internal threaded holes can be perpendicular to the mating end faces where the first lower half - annular seat 11 is located. Through holes can be provided on both mating end faces of the second lower half - annular seat 12, and the through holes can be perpendicular to the mating end faces where the second lower half - annular seat 12 is located. Moreover, screw - insertion notches can be provided on the outer peripheral walls of the second lower half - annular seat 12 near the two mating end faces, and the two screw - insertion notches communicate with the through holes on the two mating end faces of the second lower half - annular seat 12 one by one. In this way, as Figure 1 and Figure 2 shown, two screws 4 can be inserted one by one from the two screw - insertion notches, pass through the through holes on the two mating end faces of the second lower half - annular seat 12 one by one, and finally be tightened one by one into the internal threaded holes on the two mating end faces of the first lower half - annular seat 11, so as to achieve fastening after the first lower half - annular seat 11 and the second lower half - annular seat 12 are joined together. Of course, this fastening method is built - in and will not interfere with the assembly of the upper annular seat 2 and the upper annular seat 2.

[0085] Furthermore, the generator bushing flange sealability detection tool provided by the embodiment of the present utility model further includes a pressing component;

[0086] The pressing component is used to be installed inside the generator outgoing line cover and is used to press the upper end face of the annular seat.

[0087] Among them, as described above, the gas injected into the sealing chamber needs to reach a certain air pressure (which can be 3 bar). Of course, if the gas pressure in the sealing chamber is greater than the friction force between the first sealing strip 5 and the inner peripheral wall of the bushing installation hole, and greater than the friction force between the second sealing strip 6 and the outer peripheral wall of the bushing. In this case, this annular sealing structure (i.e., composed of the annular seat and the above two sealing strips) will generate an upward displacement along the bushing or the bushing installation hole based on the gas pressure, which also causes the installation position of this annular sealing structure to change. To avoid the occurrence of this situation, the upper end face of the annular seat can be pressed by the pressing component to provide a stopping force for the upward displacement of this annular sealing structure, so as to ensure the occupancy of this annular sealing structure.

[0088] Still further, the pressing component includes: a first pressing component and a second pressing component;

[0089] The first pressing component and the second pressing component are respectively used to be installed between two reinforcing ribs 200 inside the generator outgoing line cover, are distributed on both sides of the bushing, and are respectively used to press the upper end face of the annular seat, so as to facilitate providing a balanced stopping force for the upper end face of the annular seat, thereby better avoiding the upward displacement of the annular sealing structure.

[0090] Specifically, asFigure 14 As shown, both the first pressing assembly and the second pressing assembly include: a support rod assembly 8 and a pressing rod 9;

[0091] The support rod assembly 8 is used to be installed across between two stiffeners 200 inside the generator outgoing line cover; the pressing rod 9 is arranged on the support rod assembly 8 and is used to press the upper end surface of the annular seat.

[0092] Among them, as Figure 14 shown, one end of the support rod assembly 8 can be adjusted back and forth along the axial direction so that the span of the support rod assembly 8 can be adjusted, which is convenient for being installed across and fastened between two stiffeners 200 inside the generator outgoing line cover; among them, the structure of the support rod assembly 8 can refer to Figure 14 shown, which will not be elaborated here. In addition, a through internal threaded hole can be provided in the middle part of the support rod assembly 8 in the vertical direction. The pressing rod 9 can be a pressing screw rod and is used to cooperate with the internal threaded hole in the middle part of the support rod assembly 8 and press the upper end surface of the annular seat by screwing down; of course, a screwing head is provided at the upper end of the pressing screw rod. That is to say, the first pressing assembly and the second pressing assembly of this solution are designed in this way and have the characteristics of simple structure and convenient pressing.

[0093] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0094] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A generator casing flange sealing detection tool, characterized in that: include: An annular seat, a first sealing strip (5) and a second sealing strip (6); The annular seat is a segmented connection structure along the circumferential direction and is used to be sleeved between the inner circumferential wall of the sleeve installation hole of the generator outlet cover and the outer circumferential wall of the sleeve; wherein the annular seat is provided with a through gas injection hole; The first sealing strip (5) is used for being installed and abutting between the inner peripheral wall of the sleeve installation hole and the outer peripheral wall of the annular seat; the second sealing strip (6) is used for being installed and abutting between the inner peripheral wall of the annular seat and the outer peripheral wall of the sleeve.

2. The generator casing flange sealing detection tool according to claim 1 is characterized in that: The annular seat comprises: an upper annular seat (2), a lower annular seat (1) and a locking assembly; The upper annular seat (2) and the lower annular seat (1) are both segmented connection structures along the circumferential direction, and are respectively used to be sleeved between the inner circumferential wall of the sleeve installation hole and the outer circumferential wall of the sleeve; wherein the gas injection hole passes through the upper annular seat (2) and the lower annular seat (1); The first sealing strip (5) is installed between the lower outer periphery of the upper annular seat (2) and the upper outer periphery of the lower annular seat (1); the second sealing strip (6) is installed between the lower inner periphery of the upper annular seat (2) and the upper inner periphery of the lower annular seat (1); The locking assembly is used to lock the upper annular seat (2) to the lower annular seat (1), and to squeeze the first sealing strip (5) and the second sealing strip (6) during the locking process, so that the first sealing strip (5) extends radially to abut against the inner peripheral wall of the sleeve installation hole, and the second sealing strip (6) extends radially to abut against the outer peripheral wall of the sleeve.

3. The generator casing flange sealing detection tool according to claim 2 is characterized in that: An annular positioning groove (23) is provided in the middle portion of the lower end surface of the upper annular seat (2); An annular positioning protrusion (13) is provided in the middle portion of the upper end surface of the lower annular seat (1) and is used to cooperate with the annular positioning groove (23); wherein the annular positioning protrusion (13) and the annular positioning groove (23) are both segmented matching structures along the circumferential direction; The first sealing strip (5) is wound around a first portion of the upper end surface of the lower annular seat (1) and is in contact with the outer peripheral wall of the annular positioning protrusion (13); the second sealing strip (6) is wound around a second portion of the upper end surface of the lower annular seat (1) and is in contact with the inner peripheral wall of the annular positioning protrusion (13).

4. The generator casing flange sealing detection tool according to claim 2, characterized in that: Also includes a gas nozzle (10); The gas injection hole on the upper annular seat (2) is a first through hole (211), and the gas injection hole on the lower annular seat (1) is a first internal threaded hole (111); The gas outlet end of the gas nozzle (10) passes through the first through hole (211) of the upper annular seat (2) and is screwed to the first internal threaded hole (111) of the lower annular seat (1); wherein the gas inlet end of the gas nozzle (10) is used for injecting helium.

5. The generator casing flange sealing detection tool according to claim 2, characterized in that: The upper annular seat (2) is provided with a plurality of second through holes (212); The upper end surface of the lower annular seat (1) is provided with a plurality of second internal thread holes (112), and the plurality of second through holes (212) are vertically aligned with the plurality of second internal thread holes (112) one by one; The locking assembly comprises: a plurality of locking bolts (3); The plurality of locking bolts (3) pass through the plurality of second through holes (212) of the upper annular seat (2) one by one, and are tightened one by one into the plurality of second internal thread holes (112) of the lower annular seat (1).

6. The generator casing flange sealing detection tool according to claim 2, characterized in that: The lower end surface of the lower annular seat (1) is provided with a plurality of supporting legs (7) and is used to rest on the inner end surface of the flange.

7. The generator casing flange sealing detection tool according to any one of claims 2 to 6, characterized in that: The upper annular seat (2) is a two-section connection structure along the circumferential direction, and comprises: a first upper semi-annular seat (21) and a second upper semi-annular seat (22) which are connected in abutment; The lower annular seat (1) is a two-section connection structure along the circumferential direction, and comprises a first lower semi-annular seat (11) and a second lower semi-annular seat (12) which are connected in abutment with each other.

8. The generator casing flange sealing detection tool according to claim 1, characterized in that: Also included is a hold-down assembly; The clamping assembly is used to be installed in the generator outlet cover and to clamp the upper end surface of the annular seat.

9. The generator casing flange sealing detection tool according to claim 8, characterized in that: The clamping assembly comprises: a first clamping assembly and a second clamping assembly; The first pressing assembly and the second pressing assembly are respectively used to be installed between two reinforcing ribs (200) in the generator outlet cover, and are distributed on both sides of the sleeve, and are respectively used to press the upper end surface of the annular seat.

10. The generator casing flange sealing detection tool according to claim 9, characterized in that: The first pressing assembly and the second pressing assembly both comprise: a support rod assembly (8) and a pressing rod (9); The support rod assembly (8) is used to span between two reinforcing ribs (200) installed in the generator outlet cover; the clamping rod (9) is arranged on the support rod assembly (8) and is used to clamp the upper end surface of the annular seat.

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