Nuclear power station electromagnetic pilot operated valve sealing test device

Abstract

The utility model discloses a nuclear power station electromagnetic pilot operated valve sealing performance test device which comprises a fixing assembly, a mounting seat, a sealing block, an air exhaust cover, an air exhaust pipeline and a detection assembly. The fixing assembly is provided with a through hole. The mounting seat is provided with a mounting groove for mounting the fixing assembly, the mounting groove is communicated with the through hole, and the exhaust hood is mounted on the upper surface of the mounting seat; the mounting seat is provided with a first channel; two ends of the exhaust pipeline are respectively connected with the first channel and the vacuum pump; the installation seat is further provided with a second channel, the detection assembly comprises a bubble counting bottle, an air inlet pipe and a connecting pipe, one end of the air inlet pipe extends into leakage detection liquid in the bubble counting bottle, one end of the connecting pipe is connected with the bubble counting bottle, and the other end of the connecting pipe is connected with the air inlet end of the second channel. The device is used for checking and verifying the sealing performance of the valve seat and the valve clack in the off-line maintenance stage, the sealing performance can be visually verified and judged normally in a leakage rate collection mode, and the maintenance quality can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power plant valve tightness test technical field especially relates to a nuclear power station electromagnetic pilot valve tightness test device. BACKGROUND

[0002] As Figure 1 The DMS6 type electromagnetic pilot valve is special in design structure, adopts multiple pilots and double valve series structure, and the valve clack and valve seat sealing surface of the inlet side electromagnetic pilot valve main valve have no sealing verification means during the maintenance process.

[0003] The sealing of the inlet side electromagnetic pilot valve clack and valve seat will directly affect the valve design function, and if the sealing is unqualified, the unit may be up to execute the valve function test unqualified, and the site has appeared the event that the function test unqualified leads to unit state maintenance, and the normal start of the unit is affected.

[0004] The DMS6 type electromagnetic pilot valve manufacturer does not design and provide the inlet side electromagnetic pilot valve clack and valve seat sealing verification tool, and only indirectly guarantees the sealing by the size measurement of the sealing surface during the maintenance process, and the method has the following disadvantages:

[0005] 1. Compared with the conventional sealing verification method by pressure and leakage collection, the verification method is not direct enough, and the sealing of the sealing surface cannot be directly verified and evaluated.

[0006] 2. The verification method is easily affected by tools and human factors, for example, unreasonable tool selection or improper personnel measurement method, or there is a large measurement error, which easily affects the actual inspection and evaluation effect. UTILITY MODEL CONTENT

[0007] The utility model solves the technical problem, and provides a nuclear power station electromagnetic pilot valve tightness test device.

[0008] The utility model discloses a technical scheme that solves its technical problem is: construct a kind of nuclear power plant electromagnetic pilot valve tightness test device, including fixed component, mounting seat, sealing block, suction hood, suction pipeline and detection component;The fixed component connects the valve seat and piston cylinder of nuclear power plant electromagnetic pilot valve, to form piston cylinder assembly;The fixed component is equipped with through-hole;The sealing block is used to seal the outlet end of the valve seat;The mounting seat is equipped with the installation groove for the fixed component installation, the installation groove is communicated with the through-hole arrangement, the suction hood is installed on the upper surface of the mounting seat and covers the outer periphery of the piston cylinder assembly;The circumferential side of the mounting seat is equipped with the first passageway communicated with the installation groove arrangement, and the two ends of the suction pipeline are connected with the first passageway and vacuum pump respectively;

[0009] The mounting seat is also equipped with second passageway, and the air inlet end of the second passageway is located on the circumferential side of the mounting seat, and the air outlet end of the second passageway is located on the upper surface of the mounting seat, and the detection component includes bubble counting bottle, air inlet pipe and connecting pipe, one end of the air inlet pipe is inserted into the leak detection liquid in the bubble counting bottle, one end of the connecting pipe is connected with the bubble counting bottle, and the other end of the connecting pipe is connected with the air inlet end of the second passageway.

[0010] In some embodiments, the upper surface of the mounting seat is provided with an annular groove, and a sealing ring is arranged in the annular groove.

[0011] In some embodiments, the fixed component includes a connecting seat and a fixed seat, the connecting seat is arranged at the inlet end of the valve seat, the fixed seat is threadedly connected with the part of the connecting seat protruding from the valve seat, and the inner cavities of the connecting seat and the fixed seat are communicated to form the passageway.

[0012] In some embodiments, a stepped surface is arranged on the outer periphery of the fixed seat.

[0013] An annular groove is arranged on the upper periphery of the installation groove, the annular groove is communicated with the inner cavity of the installation groove, a sealing ring is arranged in the annular groove, and the stepped surface abuts against the upper surface of the sealing ring.

[0014] In some embodiments, at least one release valve is arranged on the suction pipeline.

[0015] In some embodiments, at least one isolation valve is arranged on the suction pipeline.

[0016] In some embodiments, at least one pressure gauge is arranged on the suction pipeline.

[0017] In some embodiments, the mounting seat is in a cylindrical structure.

[0018] In some embodiments, the air extraction cover is a cylindrical structure.

[0019] In some embodiments, the fixing assembly, the mounting seat and the air extraction cover are metal pieces.

[0020] The nuclear power station electromagnetic pilot valve sealing property test device has the advantages that the sealing property of the valve seat and the valve disc can be intuitively verified and judged by collecting the leakage rate in the offline maintenance stage, the maintenance quality can be ensured, and the risk of test failure caused by unqualified sealing property of the sealing surface is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings and embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0022] Figure 1 It is a structure schematic view of DMS6 type electromagnetic pilot valve;

[0023] Figure 2 It is a structure schematic view of the nuclear power station electromagnetic pilot valve sealing property test device in some embodiments of the utility model;

[0024] Figure 3 It is a partial structure sectional view of the nuclear power station electromagnetic pilot valve sealing property test device in some embodiments of the utility model;

[0025] Figure 4 It is a partial structure schematic view of the nuclear power station electromagnetic pilot valve sealing property test device in some embodiments of the utility model;

[0026] Figure 5 It is a partial structure exploded view of the nuclear power station electromagnetic pilot valve sealing property test device in some embodiments of the utility model;

[0027] Figure 6 It is a size parameter schematic view of the connecting seat in some embodiments of the utility model;

[0028] Figure 7 It is a size parameter schematic view of the fixing seat in some embodiments of the utility model;

[0029] Figure 8 It is a size parameter schematic view of the mounting seat in some embodiments of the utility model;

[0030] Figure 9is a size parameter schematic view of the sealing block in some embodiments of the utility model;

[0031] Figure 10 is a size parameter schematic view of the air extraction cover in some embodiments of the utility model. DETAILED DESCRIPTION

[0032] In order to have a more clear understanding of the technical features, objects and effects of the utility model, the specific implementation manners of the utility model will be described in detail with reference to the drawings. In the following description, it should be understood that the directions or position relations indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or position relations shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical scheme, and do not indicate that the indicated device or element must have a particular direction, so it cannot be understood as a limitation on the utility model.

[0033] It should be further pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. When an element is referred to as "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there can be one or more intermediate elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical scheme, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more features. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] In the following description, specific details are presented to facilitate a thorough understanding of the embodiments of the utility model, but the skilled person in the art should understand that the utility model can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted to avoid unnecessary details that hinder the description of the utility model.

[0035] Reference Figures 2 to 5The utility model discloses a nuclear power station electromagnetic pilot valve leakproofness test device can be used for nuclear power station electromagnetic pilot valve leakproofness test, and nuclear power station electromagnetic pilot valve includes but is not limited to import side electromagnetic pilot valve such as DMS6 type electromagnetic pilot valve, namely the nuclear power station electromagnetic pilot valve leakproofness test device can solve the problem that import side electromagnetic pilot valve main valve clapper and valve seat leakproofness can not be verified in overhaul stage, to guarantee the leakproofness of import side electromagnetic pilot valve main valve clapper and valve seat, ensure the maintenance quality, avoid the risk of test failure caused by unqualified sealing surface leakproofness.

[0036] Refer to Figures 2 to 5 As shown, the nuclear power station electromagnetic pilot valve leakproofness test device includes fixed assembly 10, mounting seat 20, sealing block 30, suction hood 40, suction pipeline 50 and detection assembly 60, and the fixed assembly 10 is connected with the valve seat 101 and the piston cylinder 102 of the nuclear power station electromagnetic pilot valve to form the piston cylinder assembly 100. In addition, the valve clapper 103 can be normally installed into the piston cylinder 102 after the piston ring is installed, so that the assembly of the whole piston cylinder assembly 100 is consistent with the state after the actual assembly of the on-site equipment is completed.

[0037] The fixed assembly 10 is provided with a channel 10a, and the fixed assembly 10 includes a connecting seat 11 and a fixed seat 12, the connecting seat 11 is arranged at the inlet end of the valve seat 101, the fixed seat 12 is threadedly connected with the part of the connecting seat 11 protruding from the valve seat 101, and the inner cavities of the connecting seat 11 and the fixed seat 12 are communicated to form the channel 10a.

[0038] The sealing block 30 is used for sealing the outlet end of the valve seat 101, the mounting seat 20 is provided with a mounting groove 21 for mounting the fixed assembly 10, the mounting groove 21 is communicated with the channel, the suction hood 40 is mounted on the upper surface of the mounting seat 20 and covers the outer periphery of the piston cylinder assembly 100, and the circumferential side surface of the mounting seat 20 is provided with a first channel 22 communicated with the mounting groove 21, and the two ends of the suction pipeline 50 are connected with the first channel 22 and the vacuum pump 70 respectively. The suction port of the first channel 22 located on the circumferential side surface of the mounting seat 20 can be provided with a first quick connector to realize quick connection with the suction pipeline 50.

[0039] The mounting seat 20 is also provided with a second channel 23, the air inlet end of the second channel 23 is located on the circumferential side surface of the mounting seat 20, the air outlet end of the second channel 23 is located on the upper surface of the mounting seat 20, and the air inlet end of the second channel 23 can be provided with a second quick connector to realize quick connection with the subsequent connecting pipe 63.

[0040] The detection assembly 60 comprises a bubble counting bottle 61, an air inlet pipe 62 and a connecting pipe 63. One end of the air inlet pipe 62 extends into the leak detection liquid in the bubble counting bottle 61, and the other end of the air inlet pipe 62 is connected to the atmosphere. One end of the connecting pipe 63 is connected to the bubble counting bottle 61, but the connecting pipe 63 does not extend into the leak detection liquid. The other end of the connecting pipe 63 is connected to the air inlet end of the second channel 23. The bubble counting bottle 61 can be a transparent bottle.

[0041] When the vacuum pump 70 is started to perform negative pressure pumping on the internal chamber of the sealing area of the valve seat 101 and the valve disc 103 through the air pumping pipeline 50, a vacuum negative pressure area is formed in the internal chamber of the valve seat 101 and the valve disc 103. If there is a leak in the sealing area of the valve seat 101 and the valve disc 103, the sealing area formed between the air pumping cover 40 and the mounting seat 20 will be further pumped to negative pressure through the leak. Once the area is pumped to negative pressure, the external atmospheric space will be pressurized to the area through the bubble counting bottle 61 to maintain pressure balance. During the pressurization process, bubbles will be formed through the air inlet pipe 62 inserted into the leak detection liquid. In this way, the number of bubbles generated during the pressurization process can directly verify the sealing performance of the valve seat 101 and the valve disc 103.

[0042] In some embodiments, the upper surface of the mounting seat 20 is provided with an annular groove 24, and a sealing ring 25 is arranged in the annular groove 24. The annular groove 24 can be arranged near the side edge of the upper surface of the mounting seat 20. The lower peripheral edge of the air pumping cover 40 is matched with the sealing ring 25, for example, the lower peripheral edge of the air pumping cover 40 abuts against the upper surface of the sealing ring 25, or the inner side of the lower peripheral edge of the air pumping cover 40 abuts against the outer side of the circumference of the sealing ring 25, as long as the sealing performance is improved, which is not limited here. The sealing ring 25 includes but is not limited to a silica gel sealing ring.

[0043] As shown in Figures 3 to 5 In some embodiments, the outer peripheral edge of the fixing seat 12 is provided with a stepped surface 121, and the upper peripheral edge of the mounting groove 21 is provided with an annular groove 26 which is in communication with the inner cavity of the mounting groove 21. A sealing ring 27 is arranged in the annular groove 26, and the stepped surface 121 abuts against the upper surface of the sealing ring 27 to improve the sealing performance between the fixing seat 12 and the mounting seat 20.

[0044] In some embodiments, at least one release valve 51 is arranged on the air pumping pipeline 50 to prevent the pressure of the air pumping pipeline 50 from being too high.

[0045] In some embodiments, at least one isolation valve 52 is arranged on the air pumping pipeline 50. The isolation valve 52 can be a manual valve.

[0046] In some embodiments, at least one pressure gauge 53 is provided on the suction line 50 to detect pressure changes.

[0047] In some embodiments, the mounting seat 20 is in a cylindrical structure. In some embodiments, the suction cover 40 is in a cylindrical structure.

[0048] In some embodiments, the fixing assembly 10, the mounting seat 20 and the suction cover 40 are all metal pieces, for example, the fixing assembly 10, the mounting seat 20 and the suction cover 40 are all made of stainless steel. Of course, the fixing assembly 10, the mounting seat 20 and the suction cover 40 can also be made of other materials, which are not limited here.

[0049] In some embodiments, the sealing block 30 can be generally in a table body structure, and the sealing block 30 can be made of silica gel material, rubber material or soft metal material (which can be brass).

[0050] In some embodiments, the size parameters of the connecting seat 11 can be implemented according to Figure 6 In some embodiments, the size parameters of the fixing seat 12 can be implemented according to Figure 7 In some embodiments, the size parameters of the mounting seat 20 can be implemented according to Figure 8 In some embodiments, the size parameters of the sealing block 30 can be implemented according to Figure 9 In some embodiments, the size parameters of the suction cover 40 can be implemented according to Figure 10 In some embodiments, the size parameters of the suction cover 40 can be implemented according to

[0051] The nuclear power plant electromagnetic pilot valve sealing test device is used for checking and verifying the sealing of the valve seat 101 and the valve disc 103 in the offline maintenance stage, and can realize sealing verification of the valve seat 101 and the valve disc 103 of the nuclear power plant electromagnetic pilot valve in the normal assembly condition, that is, the various matching components should be assembled together for verification in the normal assembly condition. It can directly verify and judge the sealing by collecting the leakage rate. It can ensure the maintenance quality, avoid the risk of test failure caused by unqualified sealing surface sealing, and thus improve the operation safety and stability of the unit.

[0052] It can be understood that the above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application; it should be pointed out that for ordinary skilled persons in the art, the above technical features can be freely combined without departing from the concept of the present application, and some deformations and improvements can be made, which all belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application should belong to the scope of the claims of the present application.

Claims

1. A nuclear power plant electromagnetic pilot valve tightness test device, characterized by, The utility model relates to a kind of nuclear power plant electromagnetic pilot valve leak detection device, including fixed component (10), mounting seat (20), sealing block (30), suction cover (40), suction pipeline (50) and detection component (60);The fixed component (10) is connected with the valve seat (101) of nuclear power plant electromagnetic pilot valve and piston cylinder (102), to form piston cylinder assembly (100);The fixed component (10) is equipped with passageway;The sealing block (30) is used to seal the outlet end of the valve seat (101);The mounting seat (20) is equipped with the installation groove (21) for the installation of the fixed component (10), the installation groove (21) is communicated with the passageway arrangement, the suction cover (40) is installed on the upper surface of the mounting seat (20) and covers and is equipped in the outer periphery of the piston cylinder assembly (100);The circumferential side of the mounting seat (20) is equipped with the first passageway (22) with the installation groove (21) communication arrangement, the both ends of the suction pipeline (50) are connected with the first passageway (22) and vacuum pump (70) respectively; The mounting seat (20) is also equipped with the second passageway (23), the air inlet end of the second passageway (23) is located on the circumferential side of the mounting seat (20), and the air outlet end of the second passageway (23) is located on the upper surface of the mounting seat (20), the detection component (60) includes bubble counting bottle (61), air inlet pipe (62) and connecting pipe (63), one end of the air inlet pipe (62) is inserted into the leak detection liquid in the bubble counting bottle (61), one end of the connecting pipe (63) is connected with the bubble counting bottle (61), and the other end of the connecting pipe (63) is connected with the air inlet end of the second passageway (23).

2. The nuclear power plant electromagnetic pilot valve tightness test device according to claim 1, characterized by The upper surface of the mounting seat (20) is equipped with annular groove (24), the annular groove (24) is equipped with sealing ring (25), and the lower circumferential edge of the suction cover (40) is matched with the sealing ring (25).

3. The nuclear power plant electromagnetic pilot valve tightness test device according to claim 1, characterized by The fixed component (10) includes connecting seat (11) and fixed seat (12), the connecting seat (11) is threaded into the inlet end of the valve seat, the fixed seat (12) is threadedly connected with the part of the connecting seat (11) protruding from the valve seat, and the inner cavities of the connecting seat (11) and the fixed seat (12) are communicated to form the passageway.

4. The nuclear power plant electromagnetic pilot valve tightness test device according to claim 3, characterized by The outer circumferential edge of the fixed seat (12) is equipped with step surface (121). The upper circumferential edge of the installation groove (21) is equipped with annular groove (26), the annular groove (26) is communicated with the inner cavity of the installation groove (21), the annular groove (26) is equipped with sealing ring (27), and the step surface (121) abuts against the upper surface of the sealing ring (27).

5. The nuclear power plant electromagnetic pilot valve tightness test device according to claim 1, characterized by At least one release valve (51) is arranged on the suction pipeline (50).

6. The nuclear power plant electromagnetic pilot valve tightness test device according to claim 1, characterized by At least one isolation valve (52) is arranged on the suction pipeline (50).

7. The electromagnetic pilot valve tightness testing device for nuclear power plants according to claim 1, characterized by At least one pressure gauge (53) is arranged on the suction pipeline (50).

8. The electromagnetic pilot valve tightness testing device for nuclear power plants according to claim 1, characterized by The mounting seat (20) is in cylindrical structure.

9. The electromagnetic pilot valve tightness testing device for nuclear power plants according to claim 1, characterized by The suction cover (40) is in cylindrical structure.

10. The electromagnetic pilot valve tightness testing device for nuclear power plants according to claim 1, characterized by The fixed component (10), the mounting seat (20) and the suction cover (40) are metal pieces.

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