Nuclear power plant ball valve seat assembly taking and placing device

Abstract

The utility model discloses a nuclear power plant ball valve seat assembly pick-and-place device which comprises a shell, a moving assembly and a connecting assembly, the shell is provided with a first side plate and a second side plate, and the first side plate is provided with a through groove; the first side plate is provided with a first limiting groove, and the second side plate is provided with a second limiting groove. The moving assembly comprises a moving support, a lead screw, a sliding block and a guide rod, the moving support comprises a first supporting plate and a second supporting plate, the first supporting plate is located in the first limiting groove, and the second supporting plate is located in the second limiting groove; the guide rod is connected with the first supporting plate and the second supporting plate, the sliding block is movably installed on the guide rod, the lead screw penetrates through the through groove and the first supporting plate, and the lead screw is connected with the sliding block; the connecting assembly comprises a first connecting rod and a second connecting rod, the first connecting rod is connected with the sliding block, and the second connecting rod is used for being connected with a screw hole of the valve seat. Through a mechanical tool, the device can reduce the working intensity of workers, is simple and convenient to operate, and improves the ball valve overhauling efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power technology field especially relates to a nuclear power plant ball valve seat subassembly taking and placing device. BACKGROUND

[0002] As an important component of pipeline system, the reliability and sealing performance of the structure of the valve have a vital influence on the safety of the system, and the ball valve is widely used in various pipeline systems due to small fluid resistance, simple operation and other characteristics. Figure 1 As shown in the figure, the ball valve of the related art is mainly composed of a valve body, a valve cover, a valve ball, a valve stem, a valve seat, a sealing ring, a disc spring and a handle. When the valve is actuated, the valve stem and the valve ball are rotated by the handle to open and close the valve. To ensure the reliability of the ball valve, the detection personnel need to detect the ball valve regularly and replace the damaged parts accordingly. However, due to the extrusion force of the disc spring, the sealing surface is tightly attached to the ball, and a certain compression force is formed between the valve seat and the valve body. Therefore, it is difficult to take out the valve seat and the valve ball without appropriate tools. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a nuclear power plant ball valve seat subassembly taking and placing device.

[0004] The utility model adopts the technical scheme that a nuclear power plant ball valve seat subassembly taking and placing device is constructed, which comprises an outer shell, a plurality of moving assemblies and a plurality of connecting assemblies, the outer shell is provided with oppositely arranged first and second side plates, and the first side plate is provided with a through slot.

[0005] Each moving assembly comprises a moving support, a lead screw, at least two sliding blocks and at least two guide rods, the moving support comprises oppositely arranged first and second support plates, the first support plate is located in the first limiting slot, and the second support plate is located in the second limiting slot; at least two guide rods are connected to the first and second support plates, at least two sliding blocks are movably installed on the guide rods and are arranged at intervals along the length direction of the guide rods, the lead screw is arranged in the through slot and the first support plate, and the lead screw is connected to the sliding blocks.

[0006] Each connecting assembly comprises axially connected first and second connecting rods, the first connecting rod is connected to the sliding block, and the second connecting rod is used for connecting with the screw hole of the valve seat.

[0007] In some embodiments, the moving support further comprises a connecting plate connected to the first and second support plates.

[0008] In some embodiments, the moving assembly further comprises an operating member connected with the part of the lead screw protruding from the through slot.

[0009] In some embodiments, the housing further comprises a top plate connecting the first side plate and the second side plate; at least one handle is arranged on the top plate.

[0010] In some embodiments, the housing further comprises two reinforcing plates connecting the first side plate, the second side plate and the top plate.

[0011] In some embodiments, the first connecting rod comprises a first rod body, a first end of the first rod body is connected with the sliding block through a bearing, and a second end of the first rod body is provided with a threaded sleeve.

[0012] The second connecting rod comprises a second rod body, a first end of the second rod body is provided with a first threaded column for threaded connection with the threaded sleeve, and a second end of the second rod body is provided with a second threaded column for connection with the threaded hole of the valve seat.

[0013] In some embodiments, a first end of the first rod body is provided with a positioning column, and the bearing is arranged on the positioning column.

[0014] In some embodiments, the diameter of the positioning column is smaller than the diameter of the first rod body, and a clamping groove is formed between the end face of the bearing and the end face of the first rod body.

[0015] The moving assembly further comprises a bearing baffle clamped in the clamping groove.

[0016] In some embodiments, an outer side face of the second rod body is provided with an abutting part for abutting against the side face of the valve seat.

[0017] In some embodiments, a first operating part is arranged on the first rod body, and / or a second operating part is arranged on the second rod body.

[0018] The utility model discloses have following beneficial effects: the nuclear power plant ball valve seat assembly taking and placing device passes through mechanical frock, can reduce personnel work intensity, and operation is simple and convenient, improves ball valve overhaul efficiency. The position of connecting assembly is adjustable, can simultaneously adapt to different caliber valves, realizes one machine multiple use. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the utility model, the utility model will be further described below in conjunction with the drawings and embodiments, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as limiting the scope, for those skilled in the art, under the premise of not paying creative labor, still can obtain other related drawings according to these drawings. In the drawings,

[0020] Figure 1 It is the structural schematic diagram of ball valve in the related art;

[0021] Figure 2 It is one of the application schematic diagram of nuclear power plant ball valve seat assembly taking and placing device in some embodiments of the utility model;

[0022] Figure 3 It is the application schematic diagram of nuclear power plant ball valve seat assembly taking and placing device in some embodiments of the utility model two;

[0023] Figure 4 It is the application schematic diagram of nuclear power plant ball valve seat assembly taking and placing device in some embodiments of the utility model three;

[0024] Figure 5 It is the exploded view of nuclear power plant ball valve seat assembly taking and placing device in some embodiments of the utility model;

[0025] Figure 6 It is one of the structural schematic diagram of shell in some embodiments of the utility model;

[0026] Figure 7 It is the structural schematic diagram of shell in some embodiments of the utility model two;

[0027] Figure 8 It is the structural schematic diagram of connecting assembly in some embodiments of the utility model. DETAILED DESCRIPTION

[0028] In order to have more clear understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be described in detail by comparing the drawings. In the following description, it should be understood that the orientation or position relationship indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is constructed and operated in a particular orientation, only for the convenience of describing the technical scheme, and should not be understood as indicating that the device or element must have a particular orientation, therefore should not be regarded as limiting the utility model.

[0029] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0031] See Figures 2 to 8 This utility model discloses a device for picking up and placing ball valve seat assemblies in nuclear power plants, which can be applied to, but is not limited to, picking up and placing top-mounted ball valve seat assemblies.

[0032] The ball valve seat assembly pick-and-place device for nuclear power plants may include a housing 10, a number of moving components 20 and a number of connecting components 30. The housing 10 has a first side plate 11 and a second side plate 12 arranged opposite to each other. The first side plate 11 is provided with a through groove 11a. The first side plate 11 is provided with a first limiting groove 111 on the side facing the second side plate 12. The second side plate 12 is provided with a second limiting groove 121 on the side facing the first side plate 11.

[0033] The number of movable components 20 can be two. Each movable component 20 includes a movable bracket 21, a lead screw 22, at least two sliders 23, and at least two guide rods 24. The movable bracket 21 includes a first support plate 211 and a second support plate 212 facing each other. The first support plate 211 is located in the first limiting groove 111, and the second support plate 212 is located in the second limiting groove 121. At least two guide rods 24 connect the first support plate 211 and the second support plate 212. At least two sliders 23 are movably mounted on the guide rods 24 and spaced apart along the length direction of the guide rods 24. The lead screw 22 passes through the through groove 11a and the first support plate 211, and the lead screw 22 connects to the sliders 23. Preferably, each lead screw 22 can be provided with two sliders 23, and each slider 23 can be provided with a threaded hole for threaded transmission with the lead screw 22. The through groove 11a can be an elongated groove, the length direction of which is perpendicular to the length direction of the lead screw 22.

[0034] The number of connecting assemblies 30 can be four. Each connecting assembly 30 includes a first connecting rod 31 and a second connecting rod 32 that are axially connected. The first connecting rod 31 is connected to the slider 23, and the second connecting rod 32 is used to connect to the screw hole 1011 of the valve seat 101 (e.g., ...). Figure 4 (As shown).

[0035] like Figure 4 As shown, the movable support 21 also includes a connecting plate 213 that connects the first support plate 211 and the second support plate 212.

[0036] like Figure 4 As shown, the moving assembly 20 also includes an operating member 25, which is connected to the portion of the lead screw 22 that protrudes from the through groove 11a. The operating member 25 may be fixedly connected to the lead screw 22 or detachably connected, and the operating member 25 may include, but is not limited to, a handwheel.

[0037] Furthermore, such as Figure 5 As shown, the moving component 20 may also be provided with a limiting baffle 27 for engaging between the operating member 25 and the first side plate 11. Understandably, rotating adjacent operating members 25 can respectively drive adjacent lead screws 22 to rotate, thereby enabling at least two sliders 23 on each lead screw 22 to move simultaneously inward or outward. The distance between adjacent lead screws 22 can be adjusted by adjusting adjacent limiting baffles 27, thus adapting to ball valves of different diameters.

[0038] like Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, the housing 10 further includes a top plate 13 connecting the first side plate 11 and the second side plate 12. The first side plate 11, the second side plate 12, and the top plate 13 can be an integral structure. The top plate 13 is provided with at least one handle 40, which can be detachably connected to the top plate 13, for example, by a threaded connection. Alternatively, the handle 40 can be fixedly connected to the top plate 13. Providing the handle 40 facilitates the lifting and placing of the ball valve seat assembly in the nuclear power plant, thereby facilitating the placement and removal of the valve seat assembly. Of course, in some embodiments, the handle 40 may not be provided, and the valve seat assembly can be placed and removed by manual handling of the housing 10.

[0039] like Figures 5 to 7 As shown, in some embodiments, the housing 10 further includes two reinforcing plates 14 connecting the first side plate 11, the second side plate 12, and the top plate 13, which can improve the overall structural strength of the housing 10.

[0040] Combination Figure 5 and Figure 8 As shown, in some embodiments, the first connecting rod 31 includes a first rod body 311, the first end of which is connected to the slider 23 via a bearing 312, and the slider 23 may be provided with a bearing groove. The second end of the first rod body 311 is provided with a threaded sleeve 313.

[0041] The second connecting rod 32 includes a second rod body 321. The first end of the second rod body 321 is provided with a first threaded post 322, which is used to be threadedly connected to the threaded sleeve 313. The second end of the second rod body 321 is provided with a second threaded post 323, which is used to be connected to the threaded hole 1011 of the valve seat 101.

[0042] Combination Figure 5 and Figure 8 As shown, in some embodiments, the first end of the first rod 311 is provided with a positioning post 314, and the bearing 312 is provided on the positioning post 314.

[0043] Furthermore, the diameter of the positioning post 314 is smaller than the diameter of the first rod 311, and a groove 31a is formed between the end face of the bearing 312 and the end face of the first rod 311. The moving assembly 20 also includes a bearing baffle 26 that engages with the groove 31a. Figure 5 The bearing baffle 26 can restrict the axial movement of the first connecting rod 31. The first connecting rod 31 can rotate relative to the slider 23 through the bearing 312. Therefore, rotating the first connecting rod 31 can fix the first connecting rod 31 and the second connecting rod 32.

[0044] like Figure 8As shown, in some embodiments, the outer surface of the second rod 321 is provided with an abutment portion 324 for abutting against the side of the valve seat 101. The abutment portion 324 can be a block structure, such as an irregularly shaped block. The irregularly shaped block can adopt a structure that is thicker on the outside and thinner on the inside, providing an inward tightening force to the lower part of the valve seat 101, preventing the valve seat 101 from being squeezed into an "outward" shape due to the disc spring. The irregularly shaped block can squeeze the valve seat 101 into an "inward" tightened shape. Of course, the abutment portion 324 can also have other structural forms, which are not specifically limited here.

[0045] like Figure 8 As shown, in some embodiments, the first rod 311 is provided with a first operating part 315, and / or the second rod 321 is provided with a second operating part 325. Both the first operating part 315 and the second operating part 325 can be hexagonal head structures, facilitating wrench tightening. Because a large torque is required, the first operating part 315 and the second operating part 325 are provided for easy tightening.

[0046] The application of the ball valve seat assembly removal and placement device in a nuclear power plant is as follows: When the valve seat 101 and ball 102 of the ball valve need to be inspected, the ball valve cover is removed, and the four second connecting rods 32 are respectively connected to the four screw holes 1011 of the valve seats 101 on both sides. According to the valve diameter, the screw 22 is adjusted so that the distance of the four first connecting rods 31 is adapted to the corresponding valve. The first connecting rods 31 are screwed to fix the connection with the second connecting rods 32. At this time, the operator rotates the screw 22 or the operating component 25 to control the slider 23 to move inward. After the disc spring is compressed, the operator can hold the outer casing 10 or the handle 40 to remove the valve seat 101 and ball 102 as a whole from the valve body 100. The valve seat 101 and ball 102 constitute the valve seat assembly.

[0047] When the valve seat 101 and valve ball 102 of the ball valve need to be reinstalled into the valve body 100, the operation steps are as described above.

[0048] The ball valve seat assembly handling device for nuclear power plants offers the following advantages: Through mechanical tooling, it reduces labor intensity, is simple and convenient to operate, and improves ball valve maintenance efficiency. The 30-position adjustable connecting assembly can simultaneously accommodate valves of different diameters, achieving multi-purpose functionality.

[0049] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A device for picking up and placing ball valve seat assemblies in a nuclear power plant, characterized in that, The device includes a housing (10), several moving components (20), and several connecting components (30). The housing (10) has a first side plate (11) and a second side plate (12) disposed opposite to each other. The first side plate (11) is provided with a through groove (11a). The first side plate (11) is provided with a first limiting groove (111) on the side facing the second side plate (12), and the second side plate (12) is provided with a second limiting groove (121) on the side facing the first side plate (11). Each of the moving components (20) includes a moving bracket (21), a lead screw (22), at least two sliders (23), and at least two guide rods (24). The moving bracket (21) includes a first support plate (211) and a second support plate (212) opposite to each other. The first support plate (211) is located in the first limiting groove (111), and the second support plate (212) is located in the second limiting groove (121). At least two of the guide rods (24) connect the first support plate (211) and the second support plate (212). At least two of the sliders (23) are movably mounted on the guide rods (24) and spaced apart along the length direction of the guide rods (24). The lead screw (22) passes through the through groove (11a) and the first support plate (211), and the lead screw (22) connects to the sliders (23). Each of the connecting components (30) includes a first connecting rod (31) and a second connecting rod (32) that are axially connected, the first connecting rod (31) being connected to the slider (23) and the second connecting rod (32) being used to connect to the threaded hole of the valve seat.

2. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 1, characterized in that, The movable support (21) further includes a connecting plate (213) that connects the first support plate (211) and the second support plate (212).

3. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 1, characterized in that, The moving component (20) also includes an operating element (25) connected to the portion of the lead screw (22) that protrudes from the through groove (11a).

4. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 1, characterized in that, The outer casing (10) also includes a top plate (13) connecting the first side plate (11) and the second side plate (12); the top plate (13) is provided with at least one handle (40).

5. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 4, characterized in that, The outer casing (10) also includes two reinforcing plates (14) connecting the first side plate (11), the second side plate (12), and the top plate (13).

6. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 1, characterized in that, The first connecting rod (31) includes a first rod body (311), the first end of the first rod body (311) is connected to the slider (23) through a bearing (312), and the second end of the first rod body (311) is provided with a threaded sleeve (313); The second connecting rod (32) includes a second rod body (321), the first end of the second rod body (321) is provided with a first threaded post (322), the first threaded post (322) is used to be threadedly connected to the threaded sleeve (313), and the second end of the second rod body (321) is provided with a second threaded post (323), the second threaded post (323) is used to be connected to the threaded hole of the valve seat.

7. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 6, characterized in that, The first end of the first rod (311) is provided with a positioning post (314), and the bearing (312) is provided on the positioning post (314).

8. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 7, characterized in that, The diameter of the positioning post (314) is smaller than the diameter of the first rod (311), and a groove (31a) is formed between the end face of the bearing (312) and the end face of the first rod (311). The moving component (20) also includes a bearing baffle (26) that engages with the slot (31a).

9. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 6, characterized in that, The outer side of the second rod (321) is provided with an abutment portion (324) for abutting against the side of the valve seat.

10. The nuclear power plant ball valve seat assembly pick-and-place device according to claim 6, characterized in that, The first rod (311) is provided with a first operating part (315), and / or the second rod (321) is provided with a second operating part (325).

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