Special cylinder overturning tool for driving mechanism of main steam isolating valve of nuclear power station

Abstract

The utility model is suitable for the field of nuclear power equipment carrying, and discloses a special cylinder overturning tool for a driving mechanism of a main steam isolating valve of a nuclear power station. Comprising a first hoop used for fixing a driving mechanism, a second hoop connected with the two ends of the first hoop and used for fixing the driving mechanism, a connecting assembly used for connecting and fixing the first hoop and the second hoop, and two lifting lug assemblies fixed to the first hoop and the second hoop correspondingly. Wherein grooves are formed in the sides, close to the driving mechanism, of the first hoop and the second hoop, linings matched with the clamping and fixing position of the driving mechanism in shape are arranged in the grooves, the first hoop and the second hoop surround and tightly hold the driving mechanism, then the first hoop and the second hoop are locked through the connecting assembly, and therefore the driving mechanism is clamped and fixed. And then the lifting equipment lifts or descends the driving mechanism through the lifting lug assembly, the lining can be matched with the shapes of driving mechanisms of different models, and it is ensured that the driving mechanism can be completely limited by the first hoop and the second hoop.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power equipment carrying field especially relates to a special cylinder turning tool for nuclear power station main steam isolation valve drive mechanism. BACKGROUND

[0002] In the operation and maintenance process of the nuclear power station, the main steam isolation valve drive mechanism is one of the key equipment to ensure the safe operation of the nuclear power station. During equipment maintenance, it needs to be turned over to an inverted state for disassembly and maintenance. However, due to the irregular shape and high center of gravity of the equipment, weighing 1.8 tons, the traditional maintenance method can only use sling binding to tilt and turn over, which is time-consuming and has high operation risk, easily causing equipment damage, seriously affecting the maintenance efficiency and safety. Specifically as follows: 1. High center of gravity: the hydraulic cylinder is cylindrical, the center of gravity is high, and the traditional lifting method is easy to cause the equipment to swing or tilt in the air; 2. High risk: the traditional turning method needs to use sling binding, which is easy to cause the risk of skewing and hoisting, which may cause equipment damage or personnel injury; 3. Low efficiency: the traditional turning method needs to frequently adjust the position of the equipment, and the operation is complex, so the maintenance efficiency is low; 4. Equipment damage risk: during the turning process, the equipment is easy to be damaged due to collision or vibration, which increases the maintenance cost and equipment downtime. Lack of a special turning tool. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a special cylinder turning tool for the main steam isolation valve drive mechanism of the nuclear power station.

[0004] The technical scheme adopted by the utility model to solve its technical problem is: a special cylinder turning tool for the main steam isolation valve drive mechanism of the nuclear power station is constructed, which comprises: a hoop assembly for fixing the drive mechanism, a connecting assembly for connecting and fixing the hoop assembly, and two lifting lug assemblies respectively fixed on the hoop assembly; wherein the side of the hoop assembly close to the drive mechanism is provided with a groove, and the groove is provided with an inner lining matched with the shape of the clamping fixing position of the drive mechanism.

[0005] In some embodiments, the lifting lug assembly comprises two lifting lug seats respectively fixed on the hoop assembly, a lifting lug shaft rotatably connected with the two lifting lug seats, and a lifting lug ring rotatably connected at one end of the lifting lug shaft away from the lifting lug seat.

[0006] In some embodiments, the lifting lug seat is provided with a mounting hole for accommodating the lifting lug shaft, and the lifting lug shaft is rotatably connected in the mounting hole.

[0007] In some embodiments, the inner wall of the mounting hole is provided with an elastic pad wrapping the lifting lug shaft.

[0008] In some embodiments, the lug seat is provided with a clamping groove near one side of the hoop assembly, and the clamping groove is clamped on the hoop assembly.

[0009] In some embodiments, the hoop assembly is provided with a first threaded through hole, and the inner liner is provided with a plurality of avoiding holes, and the screw is installed in the first threaded through hole through the avoiding hole.

[0010] In some embodiments, the avoiding hole is a countersunk hole, the screw is fixed in the avoiding hole, and the screw does not contact the driving mechanism.

[0011] In some embodiments, the hoop assembly includes a first hoop and a second hoop for fixing the driving mechanism, the connecting assembly includes a first connecting piece arranged at both ends of the first hoop and a second connecting piece arranged at both ends of the second hoop, the first connecting piece and the second connecting piece are provided with fixing holes, and the first connecting piece and the second connecting piece are connected and fixed by bolts and nuts through the fixing holes.

[0012] In some embodiments, the first connecting piece is provided with a recess, and the second connecting piece is provided with a protrusion, and the recess and the protrusion are matched in shape and embedded together.

[0013] In some embodiments, the inner liner is provided with an anti-skid pad on one side near the driving mechanism.

[0014] The utility model discloses a special cylinder turning tool for nuclear power station main steam isolation valve driving mechanism has the following beneficial effects: the first hoop and the second hoop embrace the driving mechanism, then the first hoop and the second hoop are locked through the connecting assembly to clamp and fix the driving mechanism, then the hoist equipment hoists or lowers the driving mechanism through the lug assembly, the inner liner can adapt to the shape of different models of driving mechanism, ensure that the first hoop and the second hoop can completely limit the driving mechanism, do not let the driving mechanism shake when hoisting, reduce the swing and inclination risk in the turning process. BRIEF DESCRIPTION OF DRAWINGS

[0015] 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, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings. In the drawings:

[0016] Figure 1 It is a whole view of a special cylinder turning tool for nuclear power station main steam isolation valve driving mechanism in an embodiment of the utility model;

[0017] Figure 2is a sectional view of the special cylinder turning tool for the main steam isolation valve driving mechanism of a nuclear power plant in an embodiment of the utility model;

[0018] Figure 3 is a side sectional view of the special cylinder turning tool for the main steam isolation valve driving mechanism of a nuclear power plant in an embodiment of the utility model;

[0019] Figure 4 is Figure 3 the local enlarged view of A in the figure.

[0020] Reference signs

[0021] 100, first hoop; 101, groove; 110, inner liner; 111, avoiding hole; 200, second hoop; 210, first threaded hole; 300, connecting assembly; 310, first connecting piece; 311, recess; 320, second connecting piece; 321, protruding part; 400, lifting lug assembly; 410, lifting lug seat; 411, clamping groove; 420, lifting lug shaft; 421, mounting hole; 422, elastic pad; 430, lifting lug ring; 500, driving mechanism. DETAILED DESCRIPTION

[0022] 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 position relations indicated by "upper", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are constructed and operated in a specific direction, and are only for the convenience of describing the technical scheme, and do not indicate that the devices or elements indicated must have a specific direction, so it should not be understood as a limitation on the utility model.

[0023] It also needs to be explained that unless there is an explicit provision and limitation, the terms such as "mounting", "connecting", "fixing", "setting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or 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 another element, or there can be one or more intervening 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 limited by "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] Figures 1 to 4 A special cylinder turning tool for a main steam isolation valve driving mechanism of a nuclear power plant is shown in an embodiment of the utility model, which can be used for carrying the driving mechanism 500, which can include a first hoop 100 for fixing the driving mechanism 500, a second hoop 200 connected with both ends of the first hoop 100 and used for fixing the driving mechanism 500, a connecting assembly 300 for connecting the fixed hoop assembly, and two lug assemblies 400 respectively fixed on the hoop assembly; wherein the hoop assembly is provided with a groove 101 on the side close to the driving mechanism 500, and the groove 101 is provided with an inner liner 110 matched with the shape of the clamping fixing position of the driving mechanism 500.

[0025] The hoop assembly tightly surrounds the driving mechanism 500, then the hoop assembly is locked through the connecting assembly 300 to clamp and fix the driving mechanism 500, then the hoisted equipment hoists or lowers the driving mechanism 500 through the lug assembly 400, the inner liner 110 can adapt to the shape of different models of the driving mechanism 500, ensuring that the hoop assembly can completely limit the driving mechanism 500, so that the driving mechanism 500 does not shake when hoisted, reducing the swing and inclination risk in the turning process.

[0026] It can be understood that the inner shape of the first hoop 100 and the second hoop 200 is the same as the shape of the clamping position outside the driving mechanism 500.

[0027] In a specific embodiment, the hoop assembly is connected head to tail.

[0028] In a specific embodiment, one end of the first hoop 100 is hingedly connected to the second hoop 200, and the other end of the first hoop 100 is detachably connected to the second hoop 200.

[0029] Further, in the embodiment, the hoop assemblies are semi-circular annular shapes, and the hoop assemblies are annular when connected together.

[0030] Figure 1 、 Figure 2 and Figure 4 As shown in FIG. 4, the lifting lug assembly 400 in an embodiment can include two lifting lug seats 410 fixed to the hoop assembly respectively, two lifting lug shafts 420 rotatably connected to the lifting lug seats 410 respectively, and a lifting lug ring 430 rotatably connected to one end of the lifting lug shaft 420 away from the lifting lug seat 410. The lifting lug seat 410 is fixedly connected to the hoop assembly, the lifting lug shaft 420 can rotate relative to the lifting lug seat 410, and the lifting lug ring 430 can rotate relative to the lifting lug seat 410, which makes the lifting lug ring 430 adapt to different angle hoisting equipment during hoisting, and ensures force balance.

[0031] In a specific embodiment, the lifting lug seats 410 are symmetrically arranged on the hoop assembly relative to the driving mechanism 500, which can ensure force balance and prevent the driving mechanism 500 from tilting or toppling.

[0032] Figure 3 and Figure 4 As shown in FIG. 5, the lifting lug seat 410 in an embodiment can include the lifting lug seat 410 provided with a mounting hole 421 for accommodating the lifting lug shaft 420, and the lifting lug shaft 420 is rotatably connected in the mounting hole 421, and the lifting lug shaft 420 can rotate in the mounting hole 421.

[0033] Figure 4 As shown in FIG. 6, the mounting hole 421 in an embodiment can include an elastic pad 422 wrapped around the lifting lug shaft 420 arranged on the inner wall of the mounting hole 421, which can reduce the impact of the lifting lug shaft 420 on the lifting lug seat 410 during hoisting, and improve the service life of the lifting lug assembly 400.

[0034] Figure 3 and Figure 4 As shown in FIG. 7, the lifting lug seat 410 in an embodiment can include a clamping groove 411 arranged on one side of the lifting lug seat 410 close to the hoop assembly, and the clamping groove 411 is clamped to the hoop assembly, which can facilitate the fixation of the lifting lug seat 410 to the hoop assembly, and then welding.

[0035] Figure 3 and Figure 4The hoop assembly can include a first threaded through hole in an embodiment, the inner liner 110 is provided with a plurality of avoiding holes 111, and the screw is installed in the first threaded through hole through the avoiding hole 111, so that the inner liner 110 can be fixed in the hoop assembly and cannot fall off.

[0036] Figure 3 And Figure 4 The avoiding hole 111 can be a counterbore in an embodiment, the screw is fixed in the avoiding hole 111, and the screw does not contact the driving mechanism 500, so that the screw cannot scratch the driving mechanism 500.

[0037] Figure 1 And Figure 2 The connecting assembly 300 can include a first connecting piece 310 arranged at two ends of the first hoop 100 and a second connecting piece 320 arranged at two ends of the second hoop 200 in an embodiment, the first connecting piece 310 and the second connecting piece 320 are provided with fixing holes, and the first connecting piece 310 and the second connecting piece 320 are connected and fixed by bolts and nuts through the fixing holes.

[0038] Figure 3 And Figure 4 The connecting assembly 300 can include the hoop assembly including the first hoop 100 and the second hoop 200 for fixing the driving mechanism 500 in an embodiment, the first connecting piece 310 is provided with a recess 311, the second connecting piece 320 is provided with a protrusion 321, the recess 311 and the protrusion 321 are matched with each other and embedded together, and the embedded recess 311 and the protrusion 321 can ensure that the first hoop 100 and the second hoop 200 cannot be staggered with each other, so that the first hoop 100 and the second hoop 200 are in the same horizontal plane.

[0039] Figure 3 And Figure 4 The inner liner 110 can be provided with an anti-skid pad on one side close to the driving mechanism 500 in an embodiment, and the anti-skid pad can prevent the driving mechanism 500 from sliding out of the first hoop 100 and the second hoop 200.

[0040] It can be understood that the above embodiments only express the preferred embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope; it should be pointed out that the above technical features can be freely combined without departing from the concept of the utility model for ordinary skilled persons in the art, and a plurality of deformations and improvements can be made, which belong to the protection scope of the utility model; therefore, all equivalent transformations and modifications within the scope of the utility model patent claims should belong to the coverage of the utility model patent claims.

Claims

1. A special cylinder-turning tool for the drive mechanism of the main steam isolation valve in a nuclear power plant, characterized in that, include: A clamp assembly for fixing the drive mechanism (500), a connecting assembly (300) for connecting and fixing the clamp assembly, and two lifting lug assemblies (400) respectively fixed to the clamp assembly; The clamp assembly has a groove (101) on the side near the drive mechanism (500), and the groove (101) has an inner liner (110) that matches the shape of the clamping and fixing part of the drive mechanism (500).

2. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 1, characterized in that, The lug assembly (400) includes two lug seats (410) respectively fixed to the clamp assembly, a lug shaft (420) rotatably connected to the two lug seats (410) respectively, and a lug ring (430) rotatably connected to one end of the lug shaft (420) away from the lug seat (410).

3. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 2, characterized in that, The lug seat (410) is provided with a mounting hole (421) for accommodating the lug shaft (420), and the lug shaft (420) is rotatably connected in the mounting hole (421).

4. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 3, characterized in that, The inner wall of the mounting hole (421) is provided with an elastic pad (422) that wraps around the lug shaft (420).

5. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 2, characterized in that, The lug seat (410) has a slot (411) on the side near the clamp assembly, and the slot (411) is engaged with the clamp assembly.

6. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 1, characterized in that, The clamp assembly is provided with a first threaded through hole, and the inner liner (110) is provided with a plurality of clearance holes (111). The screw passes through the clearance holes (111) and is installed in the first threaded through hole.

7. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 6, characterized in that, The clearance hole (111) is a countersunk hole, and the screw is fixed in the clearance hole (111). The screw does not contact the drive mechanism (500).

8. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 1, characterized in that, The clamp assembly includes a first clamp (100) and a second clamp (200) for fixing the drive mechanism (500). The connecting assembly (300) includes a first connector (310) disposed at both ends of the first clamp (100) and a second connector (320) disposed at both ends of the second clamp (200). The first connector (310) and the second connector (320) are provided with fixing holes. The first connector (310) and the second connector (320) are connected and fixed by bolts and nuts passing through the fixing holes.

9. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 8, characterized in that, The first connector (310) has a recess (311), and the second connector (320) has a protrusion (321). The recess (311) and the protrusion (321) are shaped to fit together.

10. A special cylinder-turning tool for the main steam isolation valve drive mechanism of a nuclear power plant according to claim 1, characterized in that, The liner (110) has an anti-slip pad on the side near the drive mechanism (500).

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