Disassembling and assembling device for valve seat of electromagnetic pilot valve of nuclear power plant

Abstract

The utility model discloses a nuclear power plant electromagnetic pilot operated valve seat dismounting and mounting device which comprises a clamping limiting seat used for clamping the end of a nuclear power plant electromagnetic pilot operated valve seat, the clamping limiting seat is provided with clamping limiting grooves, the clamping limiting grooves comprise the first limiting groove and the second limiting groove, and the first limiting groove and the second limiting groove are coaxially arranged. The first limiting groove communicates with the second limiting groove, and the inner diameter of the first limiting groove is larger than that of the second limiting groove. The clamping limiting seat is further provided with a movable groove, and the movable groove communicates with the clamping limiting groove. The nuclear power plant electromagnetic pilot operated valve seat disassembling and assembling device further comprises an operation rod used for being connected with the guide sleeve. According to the device, the valve seat of the electromagnetic pilot operated valve of the nuclear power plant can be disassembled on an overhaul site without matching of machine tool machining. The device can protect related contact surfaces and parts, and the parts cannot be damaged in the disassembly and assembly process. The device is relatively simple in structure and easy to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power technology field especially relates to a nuclear power plant electromagnetic pilot valve valve seat dismounting device. BACKGROUND

[0002] In the related art, the nuclear power plant electromagnetic pilot valve, such as DMS6 type electromagnetic pilot valve, the nuclear power plant electromagnetic pilot valve valve seat 100 has a first threaded surface 101, the guide sleeve 200 has a second threaded surface 201, both are connected by threads, and the inner and outer surfaces of both are smooth cylindrical surfaces, so there is no suitable fixing tool during disassembly, which makes disassembly difficult, especially after a period of operation, the expansion deformation of the threaded position caused by the high temperature and high pressure environment on site makes the threaded position more secure, making disassembly more difficult.

[0003] The dismounting process of the nuclear power plant electromagnetic pilot valve provided by the manufacturer is to fix one end of the guide sleeve 200 on the lathe, fix the guide sleeve 200 by the lathe chuck, and then use the pipe wrench to clamp the nuclear power plant electromagnetic pilot valve valve seat 100 for disassembly. After actual execution, it is found that such a maintenance process has many drawbacks:

[0004] 1) The contact area between the lathe and the guide sleeve 200 is small, and the clamping force is not easy to control. If the clamping force is insufficient, the guide sleeve 200 will slip, which will cause unstable fixation and make it impossible to disassemble. In addition, the guide sleeve 200 will also be scratched on the contact surface, and if the clamping force is too large, the contact surface will be crushed, damaging the guide sleeve 200.

[0005] 2) When using the pipe wrench to disassemble the nuclear power plant electromagnetic pilot valve valve seat 100, it is also easy to cause the phenomenon of unstable fixation and slipping, which can easily scratch the contact surface and damage the nuclear power plant electromagnetic pilot valve valve seat 100.

[0006] 3) The related operation needs the cooperation of the machining workshop, especially the RCP system using equipment contains radioactivity, the actual execution process is more complex, which increases the additional maintenance process and time, and affects the work efficiency.

[0007] As can be seen, according to the original maintenance process, it is not only difficult to execute the equipment maintenance process, but also easy to cause damage to the surface of the parts during disassembly. UTILITY MODEL CONTENTS

[0008] The technical problem to be solved by the utility model is to provide a nuclear power plant electromagnetic pilot valve valve seat dismounting device.

[0009] The utility model discloses a technical scheme that solves its technical problem is: construct a kind of nuclear power plant electromagnetic pilot valve valve seat dismounting device, including the end of the clamping limit seat for clamping nuclear power plant electromagnetic pilot valve valve seat, the clamping limit seat has opposite first surface and second surface, the clamping limit seat is equipped with the clamping limit slot of through first surface and second surface, the clamping limit slot includes first limit slot and second limit slot, the first limit slot and the second limit slot are coaxially arranged, and the first limit slot and the second limit slot are communicated, and the inner diameter of the first limit slot is greater than the inner diameter of the second limit slot;The clamping limit seat is also equipped with the movable slot of through first surface and second surface, and the movable slot is communicated the clamping limit slot;

[0010] The nuclear power plant electromagnetic pilot valve valve seat dismounting device further includes an operating rod for connecting with the guide sleeve.

[0011] In some embodiments, the first limit slot and the second limit slot are both cylindrical slots.

[0012] In some embodiments, the inner diameter of the first limit slot is 43mm.

[0013] In some embodiments, the inner diameter of the second limit slot is 38mm.

[0014] In some embodiments, the slot width of the movable slot under the force-free state is 5mm.

[0015] In some embodiments, the thickness of the clamping limit seat is 18mm.

[0016] In some embodiments, the operating rod is a cylindrical structure.

[0017] In some embodiments, the length of the operating rod is 300mm, and the diameter is 26.7mm.

[0018] In some embodiments, the clamping limit seat is an integral structure.

[0019] In some embodiments, the clamping limit seat is a clamping limit seat made of brass; and / or the operating rod is an operating rod made of brass.

[0020] The nuclear power plant electromagnetic pilot valve seat dismounting device has the following beneficial effects: the nuclear power plant electromagnetic pilot valve seat dismounting device can be used to dismount the nuclear power plant electromagnetic pilot valve seat on the spot, and the cooperation of a machine tool is not needed; the device can protect the related contact surfaces and components, and the components will not be damaged during the dismounting process; and the device has a relatively simple structure and is easy to operate.

[0021] When the nuclear power plant electromagnetic pilot valve seat needs to be dismounted, one end of the nuclear power plant electromagnetic pilot valve seat is installed into the clamping limiting groove of the clamping limiting seat, and then the clamping limiting seat is fixed to the bench vice, the bench vice can clamp the two side walls of the clamping limiting seat in the movable groove, so that the movable groove is tightened, and then the clamping limiting groove clamps the end of the nuclear power plant electromagnetic pilot valve seat, and then one end of the length direction (or the axial direction) of the operating rod is inserted into the through hole of the guide sleeve, the guide sleeve is rotated by rotating the operating rod, and the dismounting of the nuclear power plant electromagnetic pilot valve seat and the guide sleeve is realized. The device can dismount the nuclear power plant electromagnetic pilot valve seat on the spot, and the cooperation of a machine tool is not needed. The device can protect the related contact surfaces and components, and the components will not be damaged during the dismounting process. The device has a relatively simple structure and is easy to operate. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the present application, the following will further illustrate the present application with reference to the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0023] Figure 1 is a structural schematic view of the nuclear power plant electromagnetic pilot valve seat and the guide sleeve in the related art;

[0024] Figure 2 is a detailed schematic view of the clamping limiting seat in some embodiments of the present application;

[0025] Figure 3 is a sectional view of the clamping limiting seat in some embodiments of the present application;

[0026] Figure 4 is one of the size parameter schematic views of the clamping limiting seat in some embodiments of the present application;

[0027] Figure 5 is the size parameter schematic view two of the clamping limiting seat in some embodiments of the utility model;

[0028] Figure 6 is the structure schematic view of the operating rod in some embodiments of the utility model;

[0029] Figure 7 is the size parameter schematic view of the operating rod in some embodiments of the utility model. DETAILED DESCRIPTION

[0030] In order to have a clearer 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 positional relationships indicated by "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical solutions, and do not indicate that the devices or elements referred to must have a particular direction, so it should not be understood as a limitation on the utility model.

[0031] It should be further noted 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 between 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 solutions, 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 explicitly or implicitly include one or more of the features. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the following description, for the purpose of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0033] Referring to Figures 1 to 7 The utility model discloses a nuclear power plant electromagnetic pilot valve valve seat dismounting device suitable for nuclear power plant electromagnetic pilot valve valve seat dismounting device, nuclear power plant electromagnetic pilot valve such as DMS6 type electromagnetic pilot valve, the nuclear power plant electromagnetic pilot valve valve seat 100 has first screw face 101, guide sleeve 200 has second screw face 201, and both are connected by screw, and the inner and outer surfaces of both are smooth cylindrical surface, and the circumferential side wall of guide sleeve 200 is also provided with through hole 202.

[0034] In some embodiments, the nuclear power plant electromagnetic pilot valve valve seat dismounting device comprises a clamping limiting seat 10 for clamping the end of the nuclear power plant electromagnetic pilot valve valve seat 100, the clamping limiting seat 10 has opposite first surface 10a and second surface 10b, the clamping limiting seat 10 is provided with clamping limiting groove 11 through first surface 10a and second surface 10b, the clamping limiting groove 11 comprises first limiting groove 111 and second limiting groove 112, the first limiting groove 111 and the second limiting groove 112 are coaxially arranged, and the first limiting groove 111 and the second limiting groove 112 are communicated, and the inner diameter of the first limiting groove 111 is greater than that of the second limiting groove 112; the clamping limiting seat 10 is also provided with movable groove 12 through first surface 10a and second surface 10b, the movable groove 12 is communicated with the clamping limiting groove 11, one end of the movable groove 12 is communicated with the clamping limiting groove 11, and one end of the movable groove 12 penetrates to the circumferential side wall of the clamping limiting seat 10.

[0035] The nuclear power plant electromagnetic pilot valve valve seat dismounting device also comprises an operating rod 20 for being connected with the guide sleeve 200. Specifically, the operating rod 20 is used for being connected with the through hole 202.

[0036] The nuclear power plant electromagnetic pilot valve seat dismounting deviceapplication as follows: when the nuclear power plant electromagnetic pilot valve seat 100 needs to be dismounted, one end of the nuclear power plant electromagnetic pilot valve seat 100 is installed into the clamping limiting groove 11 of the clamping limiting seat 10, then the clamping limiting seat 10 is fixed to the bench clamp, the bench clamp can clamp the two side walls of the clamping limiting seat 10 located in the movable groove 12, so that the movable groove 12 is tightened, and then the end of the length direction (or axial direction) of the operating rod 20 is inserted into the through hole 202 of the guide sleeve 200, the guide sleeve 200 is rotated by rotating the operating rod 20, and the nuclear power plant electromagnetic pilot valve seat 100 and the guide sleeve 200 are dismounted.

[0037] As shown in Figures 2 to 5 , the first limiting groove 111 and the second limiting groove 112 are both cylindrical grooves.

[0038] As shown in Figures 2 to 5 , the inner diameter of the first limiting groove 111 is 43 mm.

[0039] As shown in Figures 2 to 5 , the inner diameter of the second limiting groove 112 is 38 mm.

[0040] As shown in Figures 2 to 5 , the groove width of the movable groove 12 in the stress-free state is 5 mm. Here, the stress-free state refers to the state when the two end side walls of the movable groove 12 are not extruded by external force (for example, not clamped by the bench clamp).

[0041] As shown in Figures 2 to 5 , the thickness of the clamping limiting seat 10 is 18 mm. The clamping limiting seat 10 can be a block structure, one end of which can be an arc surface structure, and the other surfaces are planar structures. The size of the clamping limiting seat 10 can be referred to Figure 4 and Figure 5 , which are not specifically limited here.

[0042] In some embodiments, the clamping limiting seat 10 is an integral structure.

[0043] As shown in Figure 6 and Figure 7 , the operating rod 20 is a cylindrical structure.

[0044] As shown in Figure 6 and Figure 7 , the length of the operating rod 20 is 300 mm, and the diameter is 26.7 mm. The diameter of the operating rod 20 is as close as possible to the size of the through hole 202 on the guide sleeve 200, so as to reduce the shaking gap between the operating rod 20 and the guide sleeve 200 during dismounting, reduce the probability of slippage and shaking of the guide sleeve 200, and reduce the risk of component damage. The size of the operating rod 20 can be referred toFigure 7 And implementation, here is not specifically limited.

[0045] In some embodiments, the clamping limit seat 10 is made of brass clamping limit seat 10; And / or the operating rod 20 is made of brass operating rod 20. Preferably, the clamping limit seat 10 is made of brass clamping limit seat 10, and the operating rod 20 is made of brass operating rod 20.

[0046] The clamping limit seat 10 and the operating rod 20 are made of brass which is softer than the material of the electromagnetic pilot valve seat 100 and the guide sleeve 200 of the nuclear power plant, on the one hand, the softer material can realize better contact between parts, increase friction, prevent slipping, on the other hand, the tool material is soft, which is not easy to damage the electromagnetic pilot valve seat 100 and the guide sleeve 200 of the nuclear power plant in the process of use.

[0047] Through field verification, the nuclear power plant electromagnetic pilot valve seat dismounting device can smoothly complete the disassembly of the nuclear power plant electromagnetic pilot valve seat 100, is convenient to use, and has never damaged the nuclear power plant electromagnetic pilot valve seat 100 and the guide sleeve 200.

[0048] Of course, the clamping limit seat 10 and the operating rod 20 can also be selected according to the actual demand, which is not specifically limited here.

[0049] The nuclear power plant electromagnetic pilot valve seat dismounting device has the following technical effects:

[0050] 1. The nuclear power plant electromagnetic pilot valve seat 100 can be disassembled on the maintenance site, without the cooperation of machine tool processing.

[0051] 2. The nuclear power plant electromagnetic pilot valve seat dismounting device can protect the related contact surfaces and parts, and will not cause damage to the parts during dismounting.

[0052] 3. The nuclear power plant electromagnetic pilot valve seat dismounting device has a relatively simple structure and is easy to operate.

[0053] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0054] It can be understood that the above embodiments only express the preferred embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application patent; it should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, the above technical features can be freely combined, and some deformations and improvements can be made, which 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 shall belong to the scope of the claims of the present application.

Claims

1. A nuclear power plant electromagnetic pilot valve seat dismounting device, characterized by, The device comprises a clamping limit seat (10) for clamping the end of a valve seat of a nuclear power plant electromagnetic pilot valve, the clamping limit seat (10) has opposite first and second surfaces (10a, 10b), the clamping limit seat (10) is provided with a clamping limit groove (11) penetrating the first and second surfaces (10a, 10b), the clamping limit groove (11) comprises a first limit groove (111) and a second limit groove (112), the first and second limit grooves (111, 112) are coaxially arranged and communicate with each other, the inner diameter of the first limit groove (111) is larger than that of the second limit groove (112); the clamping limit seat (10) is further provided with a movable groove (12) penetrating the first and second surfaces (10a, 10b), the movable groove (12) communicates with the clamping limit groove (11). The device further comprises an operating rod (20) for connecting with the guide sleeve.

2. The nuclear power plant electromagnetic pilot valve seat dismounting device according to claim 1, characterized in that, The first and second limit grooves (111, 112) are both cylindrical grooves.

3. The electromagnetic pilot valve valve seat dismounting device of a nuclear power plant according to claim 1, characterized in that, The inner diameter of the first limit groove (111) is 43 mm.

4. The nuclear power plant electromagnetic pilot valve seat dismounting device according to claim 1, characterized in that, The inner diameter of the second limit groove (112) is 38 mm.

5. The device according to claim 1, wherein The groove width of the movable groove (12) under the force-free state is 5 mm.

6. The nuclear power plant electromagnetic pilot valve seat dismounting device according to claim 1, characterized in that, The thickness of the clamping limit seat (10) is 18 mm.

7. The nuclear power plant electromagnetic pilot valve seat dismounting device according to claim 1, characterized in that, The operating rod (20) is a cylindrical structure.

8. The nuclear power plant electromagnetic pilot valve valve seat dismounting device according to claim 1, characterized in that, The length of the operating rod (20) is 300 mm, and the diameter is 26.7 mm.

9. The device according to claim 1, wherein The clamping limit seat (10) is an integral structure.

10. The device according to claim 1, wherein The clamping limit seat (10) is made of brass; and / or the operating rod (20) is made of brass.

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