Dismounting device for piston cylinder of electromagnetic pilot operated valve of nuclear power plant

Abstract

The utility model discloses a dismounting device for a piston cylinder of an electromagnetic pilot operated valve of a nuclear power plant. The dismounting device comprises an operation board, two positioning connecting pieces and two fixing nuts, each positioning connecting piece comprises a columnar main body, at least one side surface of the columnar main body is provided with a positioning convex part which is clamped with a runner opening of a piston cylinder of the electromagnetic pilot valve of the nuclear power plant, the upper end of the columnar main body is provided with a connecting part, and the periphery of the connecting part is provided with an external thread; the operation board is provided with two through holes penetrating through the upper surface and the lower surface of the operation board, the two through holes are formed in a spaced mode, the connecting parts protrude out of the through holes, and the parts, protruding out of the through holes, of the connecting parts are fixedly connected with the fixing nuts. By applying the dismounting device for the electromagnetic pilot valve piston cylinder of the nuclear power plant, the dismounting work of the electromagnetic pilot valve piston cylinder of the nuclear power plant can be rapidly completed, the field maintenance efficiency is improved, and the dismounting device for the electromagnetic pilot valve piston cylinder of the nuclear power plant is convenient to use and does not damage equipment parts.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a disassembly device for a piston cylinder of an electromagnetic pilot valve in a nuclear power plant. Background Art

[0002] In nuclear power plants, the piston cylinder of a DMS6 solenoid-operated pilot valve fits tightly against the inner wall of the valve cavity. Two piston rings are designed around the outer wall of the piston cylinder, ensuring a tighter contact between the piston cylinder and the valve cavity. During normal maintenance, maintenance personnel manually grasp the upper opening of the piston cylinder to remove it from the valve body. However, this tight fit makes disassembly difficult. This is especially true after extended service in the system due to metal stress and deformation caused by high-temperature and high-pressure environments, adhesion between metal contact surfaces, and residual system media between component gaps after system shutdown. On-site maintenance often requires long-term lubrication of the piston cylinder and valve body gap with lubricating oil, and the use of tools such as screwdrivers and circlip pliers to pry and shake the piston cylinder. This method is not only time-consuming but also prone to scratching or damaging components during the prying process. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a disassembly device for the piston cylinder of an electromagnetic pilot valve of a nuclear power plant.

[0004] The technical solution adopted by the utility model to solve the technical problem is: constructing a nuclear power plant electromagnetic pilot valve piston cylinder disassembly device, including an operating panel, two positioning connectors and two fixing nuts;

[0005] Each of the positioning connectors comprises a columnar body, at least one side of which is provided with a positioning protrusion for engaging with a flow passage opening of a piston cylinder of an electromagnetic pilot valve of a nuclear power plant, and an upper end of the columnar body is provided with a connecting portion, the outer periphery of which is provided with an external thread;

[0006] The operating panel is provided with two through holes penetrating the upper and lower surfaces thereof, the two through holes are spaced apart, the connecting portion protrudes from the through holes, and the portion of the connecting portion protruding from the through holes is fixedly connected to the fixing nut.

[0007] In some embodiments, a bottom surface of the positioning protrusion is flush with a bottom surface of the columnar body.

[0008] In some embodiments, the columnar body has an inner side surface and an outer side surface opposite to each other, and the positioning protrusion is disposed on the outer side surface of the columnar body.

[0009] In some embodiments, the outer side surface of the columnar body is provided with a first arc surface having the same arc as the inner wall surface of the piston cylinder of the electromagnetic pilot valve of the nuclear power plant.

[0010] In some embodiments, the inner side of the columnar body is flat.

[0011] In some embodiments, a second arc-shaped surface having the same arc as the outer wall surface of the piston cylinder of the electromagnetic pilot valve of the nuclear power plant is provided on a side of the positioning protrusion away from the columnar body.

[0012] In some embodiments, the operating panel includes a plate-shaped body, the plate-shaped body is a circular structure, and the two through holes are symmetrically arranged relative to the axis of the plate-shaped body.

[0013] In some embodiments, a limiting protrusion is further provided on the lower surface of the plate-like body, and the length direction of the limiting protrusion is perpendicular to the direction of the line connecting the axes of the two through holes.

[0014] In some embodiments, the thickness of the plate-like body is 7 mm, and the diameter of the plate-like body is 70 mm; the thickness of the limiting protrusion is 10 mm; and the inner diameter of the through hole is 11 mm.

[0015] In some embodiments, the operating panel and the positioning connector are both made of brass.

[0016] The implementation of the utility model has the following beneficial effects: by using the electromagnetic pilot valve piston cylinder disassembly device of the nuclear power plant, the disassembly work of the electromagnetic pilot valve piston cylinder of the nuclear power plant can be completed quickly, thereby improving the efficiency of on-site maintenance. The electromagnetic pilot valve piston cylinder disassembly device of the nuclear power plant is easy to use and will not damage equipment components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of a nuclear power plant electromagnetic pilot valve piston cylinder disassembly device in some embodiments of the present utility model;

[0019] Figure 2 This is one of the structural diagrams of the operating panel in some embodiments of the present invention;

[0020] Figure 3 This is the second structural diagram of the operating panel in some embodiments of the present invention;

[0021] Figure 4This is one of the schematic diagrams of the size parameters of the operating panel in some embodiments of the present invention;

[0022] Figure 5 This is the second schematic diagram of the size parameters of the operating panel in some embodiments of the present invention;

[0023] Figure 6 This is one of the structural diagrams of the positioning connector in some embodiments of the present invention;

[0024] Figure 7 This is the second structural diagram of the positioning connector in some embodiments of the present utility model;

[0025] Figure 8 This is the third structural diagram of the positioning connector in some embodiments of the present invention;

[0026] Figure 9 This is one of the schematic diagrams of the size parameters of the positioning connector in some embodiments of the present invention;

[0027] Figure 10 This is the second schematic diagram of the size parameters of the positioning connector in some embodiments of the present invention;

[0028] Figure 11 This is the third schematic diagram of the size parameters of the positioning connector in some embodiments of the present invention. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0030] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", and "third" are only used to facilitate the description of the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may 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 obscuring the description of the present invention with unnecessary detail.

[0032] See Figures 1 to 11 The utility model shows a nuclear power plant electromagnetic pilot valve piston cylinder disassembly device, which can be used for nuclear power plant electromagnetic pilot valve piston cylinder disassembly, the nuclear power plant electromagnetic pilot valve piston cylinder includes but is not limited to DMS6 type electromagnetic pilot valve piston cylinder.

[0033] It includes an operating panel 10 , two positioning connectors 20 and two fixing nuts 30 .

[0034] Each positioning connector 20 comprises a cylindrical body 21. At least one side of this body 21 is provided with a positioning protrusion 22 for engaging with the flow passage opening of the piston cylinder of a nuclear power plant's electromagnetic pilot valve. The dimensions of this positioning protrusion 22 are similar to the flow passage opening within the piston of the nuclear power plant's electromagnetic pilot valve. A connecting portion 23 is provided at the upper end of this body 21, and its outer periphery is provided with external threads.

[0035] The operating panel 10 is provided with two through holes 111 passing through the upper and lower surfaces thereof. The two through holes 111 are spaced apart. The connecting portion 23 protrudes from the through holes 111 , and the portion of the connecting portion 23 protruding from the through holes 111 is fixedly connected to the fixing nut 30 .

[0036] In some embodiments, a bottom surface of the positioning protrusion 22 is flush with a bottom surface of the columnar body 21 .

[0037] In some embodiments, the columnar body 21 has an inner side surface and an outer side surface opposite to each other. The positioning protrusion 22 is disposed on the outer side surface of the columnar body 21 , and the positioning protrusion 22 is disposed close to the bottom of the columnar body 21 .

[0038] In some embodiments, the outer side surface of the columnar body 21 is provided with a first curved surface 211 with the same curvature as the inner wall surface of the piston cylinder of the electromagnetic pilot valve of the nuclear power plant, ensuring that the positioning connector 20 is tightly fitted with the flow channel opening and the inner wall of the piston after installation to avoid shaking.

[0039] In some embodiments, the inner side surface of the columnar body 21 is flat.

[0040] In some embodiments, a second arc-shaped surface 221 having the same arc as that of the outer wall of the electromagnetic pilot valve piston cylinder of the nuclear power plant is provided on a side of the positioning protrusion 22 away from the columnar body 21 .

[0041] In some embodiments, the operating panel 10 includes a plate-shaped body 11 having a circular structure, and the two through holes 111 are symmetrically arranged relative to the axis of the plate-shaped body 11. The through holes 111 may be circular holes.

[0042] In some embodiments, the lower surface of the plate-shaped body 11 is further provided with a limiting protrusion 12, the length of which is perpendicular to the line connecting the axes of the two through-holes 111. The limiting protrusion 12 can be provided to provide support on the inner side surfaces of the two columnar bodies 21, thereby ensuring a certain degree of stability for the two positioning connectors 20 during rotation of the nuclear power plant electromagnetic pilot valve piston cylinder disassembly device and smoothing torque transmission.

[0043] In some embodiments, the thickness of the plate-shaped body 11 is 7 mm, the diameter of the plate-shaped body 11 is 70 mm; the thickness of the limiting protrusion 12 is 10 mm; the inner diameter of the through hole 111 is 11 mm. The dimensions of the operating panel 10 can be referred to Figure 4 and Figure 5 Of course, the size and shape of the operating panel 10 can also be adjusted according to actual needs, and are not specifically limited here.

[0044] In some embodiments, the size of the positioning connector 20 can refer to Figure 9 、 Figure 10 and Figure 11For example, the length of the columnar body 21 can be 85.5 mm. The length of the connecting portion 23 can be 20 mm. The connecting portion 23 can be a bolt structure with a specification of M10. Of course, the size and shape of the positioning connector 20 can be adjusted appropriately according to actual needs and are not specifically limited here.

[0045] In some embodiments, the operating panel 10 and the positioning connector 20 are both made of brass. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device is made of brass, which is softer than the material of the nuclear power plant electromagnetic pilot valve piston cylinder. Furthermore, the contact surfaces with the nuclear power plant electromagnetic pilot valve piston cylinder are both curved (first curved surface 211 and second curved surface 221), without sharp corners, to prevent damage to the equipment during use.

[0046] It can be understood that the positioning connector 20 of the nuclear power plant electromagnetic pilot valve piston cylinder disassembly device is a two-piece structure, so that it can be smoothly installed into the corresponding position in the nuclear power plant electromagnetic pilot valve piston cylinder during use. After installation, it is fixed by the operating panel 10 and the fixing nut 30.

[0047] After the nuclear power plant electromagnetic pilot valve piston cylinder disassembly device is installed, maintenance personnel can directly rotate and pull the nuclear power plant electromagnetic pilot valve piston cylinder through the operating panel 10 to remove the nuclear power plant electromagnetic pilot valve piston cylinder from the valve body. If the nuclear power plant electromagnetic pilot valve piston cylinder is in too close contact with the valve body during maintenance, making disassembly difficult, tools such as a crowbar and a screwdriver can be inserted into the gap between the protruding part of the nuclear power plant electromagnetic pilot valve piston cylinder disassembly device and the valve body to increase the force to pry the nuclear power plant electromagnetic pilot valve piston cylinder to assist in disassembly. In this case, the force point is on the nuclear power plant electromagnetic pilot valve piston cylinder disassembly device, and no damage will be done to the equipment components.

[0048] By using the nuclear power plant electromagnetic pilot valve piston cylinder disassembly device, the nuclear power plant electromagnetic pilot valve piston cylinder disassembly work can be completed quickly, thereby improving on-site maintenance efficiency. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device is easy to use and will not damage equipment components (the nuclear power plant electromagnetic pilot valve piston cylinder components and / or valve body components).

[0049] In the description of this specification, the description with reference to 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to 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, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0050] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A nuclear power plant electromagnetic pilot valve piston cylinder disassembly device, characterized in that: It comprises an operating panel (10), two positioning connectors (20) and two fixing nuts (30); Each positioning connector (20) comprises a columnar body (21), at least one side surface of the columnar body (21) is provided with a positioning protrusion (22) for engaging with a flow passage opening of a piston cylinder of an electromagnetic pilot valve of a nuclear power plant, an upper end of the columnar body (21) is provided with a connecting portion (23), and an outer periphery of the connecting portion (23) is provided with an external thread; The operating panel (10) is provided with two through holes (111) passing through the upper and lower surfaces thereof, the two through holes (111) are arranged at intervals, the connecting portion (23) protrudes from the through holes (111), and the portion of the connecting portion (23) protruding from the through holes (111) is fixedly connected to the fixing nut (30).

2. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to claim 1, characterized in that: The bottom surface of the positioning protrusion (22) is flush with the bottom surface of the columnar body (21).

3. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to claim 1, characterized in that: The columnar body (21) has an inner side surface and an outer side surface that are opposite to each other, and the positioning protrusion (22) is arranged on the outer side surface of the columnar body (21).

4. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to claim 3, characterized in that: The outer side surface of the columnar body (21) is provided with a first arc surface (211) having the same arc as the inner wall surface of the piston cylinder of the electromagnetic pilot valve of the nuclear power plant.

5. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to claim 4, characterized in that: The inner side surface of the columnar body (21) is a plane.

6. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to claim 1, characterized in that: A second arc-shaped surface (221) having the same arc as the outer wall surface of the piston cylinder of the electromagnetic pilot valve of the nuclear power plant is provided on a side of the positioning protrusion (22) away from the columnar body (21).

7. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to claim 1, characterized in that: The operating panel (10) comprises a plate-shaped body (11), the plate-shaped body (11) is a circular structure, and the two through holes (111) are symmetrically arranged relative to the axis of the plate-shaped body (11).

8. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to claim 7, characterized in that: The lower surface of the plate-shaped body (11) is further provided with a limiting protrusion (12), and the length direction of the limiting protrusion (12) is perpendicular to the direction of the line connecting the axes of the two through holes (111).

9. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to claim 8, characterized in that: The thickness of the plate-shaped body (11) is 7 mm, and the diameter of the plate-shaped body (11) is 70 mm; the thickness of the limiting protrusion (12) is 10 mm; and the inner diameter of the through hole (111) is 11 mm.

10. The nuclear power plant electromagnetic pilot valve piston cylinder disassembly device according to any one of claims 1 to 9, characterized in that: The operating panel (10) and the positioning connector (20) are both made of brass.

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