Nut tightening device for sealing section of nuclear power station

Abstract

The utility model provides a nuclear power station sealing section nut tightening device which comprises a rotating handle and at least one plug pin arranged on one side of the rotating handle, the plug pin is inserted into a clamping hole in a sealing section nut, and a penetrating notch for a sleeve to penetrate through is formed in the rotating handle. The tightening device is simple in structure, convenient to operate and capable of quickly and effectively tightening the nut. The detachable design of the plug pin and the rotating handle enables the device to be more flexible and can be adjusted and maintained according to actual needs. Due to the anti-skid design, the operation safety is improved, and the working risk is reduced.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary instruments for nuclear power plants, in particular to a nut tightening device for a sealing section of a nuclear power plant. Background Art

[0002] In the nuclear power RIC system, the sealing section is located between the guide tube, manual valve, ball valve, and electric valve. The inner wall of the guide tube, manual valve, sealing section, ball valve, electric valve and the outer wall of the finger sleeve constitute the primary water boundary. The inner wall space of the finger sleeve provides a channel for the neutron detector to enter and exit the core. The upstream of the sealing section is the end of the primary water boundary. The upstream of the sealing section isolates the atmosphere from the primary water boundary, ensuring the sealing of the primary return water and the atmosphere.

[0003] The sealing section nut is located downstream of the sealing section. During the process of inserting the repaired finger sleeve into the core, in order to ensure the dynamic seal between the outer wall of the finger sleeve and the sealing ring downstream of the sealing section, it is necessary to tighten the sealing section nut by tightening it, thereby pressing the sealing ring downstream of the sealing section to ensure the seal.

[0004] The tightening of the sealing section nut is an important part of ensuring the safe operation of nuclear power plants. Traditional tightening tools often have problems such as inconvenient operation and low efficiency. Due to space limitations, the operation is difficult and cannot meet the high requirements of nuclear power plants for tightening the sealing section nuts. Therefore, the development of a new type of nuclear power plant sealing section nut tightening device is of great significance to improving the safety and operating efficiency of nuclear power plants. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a nuclear power plant sealing section nut tightening device in view of the above problems, which has a simple structure, is easy to operate, and can effectively improve the tightening effect and work efficiency of the sealing section nut.

[0006] The utility model solves the above-mentioned technical problems by adopting a technical solution: providing a nuclear power plant sealing section nut tightening device, comprising a rotating handle and at least one latch arranged on one side of the rotating handle, the latch being inserted into a clamping hole on the sealing section nut, and the rotating handle being provided with a penetration notch for a sleeve to pass through.

[0007] Furthermore, preferably, two latches are provided, and the two latches are provided corresponding to the two clamping holes on the sealing section nut, so that a more stable tightening torque can be provided to prevent the nut from deflecting during the tightening process.

[0008] Furthermore, it is preferred that a connecting portion is provided between the rotating handle and the latch, and the connecting portion is provided with a penetration notch for the sleeve to pass through. Such a design can make it easier for the sleeve to pass through the rotating handle, thereby facilitating operation.

[0009] Furthermore, preferably, the connection part includes a first connection part and a second connection part, the first connection part and the second connection part form a step, and the latch is arranged on the outer side wall of the second connection part. This structure can improve the stability and durability of the device.

[0010] Furthermore, it is preferred that the width or diameter of the second connection portion is smaller than the width or diameter of the first connection portion, so that a step can be formed, which is convenient for reducing the weight of the entire device and making the operation of the staff more labor-saving.

[0011] Furthermore, it is preferred that the latch is detachably connected to the connecting portion. Such a design facilitates replacement of damaged latches, and the number and position of the latches can also be adjusted as required.

[0012] Furthermore, it is preferred that the latch is detachably connected to the rotating handle, thereby further enhancing the flexibility and maintainability of the device.

[0013] Furthermore, it is preferred that an anti-skid groove or an anti-skid protrusion is provided on the axial outer wall of the rotating handle, so as to improve the safety during operation and prevent accidents caused by hand slipping.

[0014] Furthermore, it is preferred that the rotating handle is a disc structure, which is convenient for holding and operating.

[0015] Furthermore, it is preferred that the length of the latch pin is at least 1 / 2 of the depth of the clamping hole on the sealing segment nut, so as to ensure that the latch pin can be firmly inserted into the clamping hole and provide sufficient tightening torque.

[0016] The nuclear power plant sealing section tightening device of the utility model has at least the following beneficial effects:

[0017] 1. Simple structure, easy operation, can quickly and effectively complete the nut tightening work.

[0018] 2. The detachable design of the latch and the rotating handle makes the device more flexible and can be adjusted and maintained according to actual needs.

[0019] 3. The anti-slip design improves the safety of operation and reduces work risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1The utility model is a schematic structural diagram of a nut tightening device for a sealing section of a nuclear power plant in one embodiment of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] like Figure 1As shown, the utility model provides a nuclear power plant sealing section nut tightening device, comprising a rotating handle 10, at least one latch 20 arranged on one side of the rotating handle 10, the latch 20 being inserted into a clamping hole on the sealing section nut, and a through-notch 30 for the sleeve to pass through is provided on the rotating handle 10. Since the through-notch 30 is provided on the rotating handle 10, the sleeve in the on-site environment can be adapted, the sleeve is clamped on the through-notch 30, and the entire device is moved along the extension direction of the sleeve to the sealing end nut position, so that it can be conveniently operated in a narrow space.

[0028] When in use, the latch pin 20 is inserted into the clamping hole of the sealing section nut, and then the handle 10 is turned to perform the tightening operation, which simplifies the operation process and improves the tightening efficiency and safety.

[0029] The accuracy and consistency of tightening are ensured, the safety performance of the nuclear power plant is improved, the device has a simple structure, is easy to operate, and is suitable for operation in a small space.

[0030] In a specific embodiment, two latches 20 are provided, and the two latches 20 are provided corresponding to the two clamping holes on the sealing section nut, so as to provide a more stable tightening torque and prevent the nut from deflecting during the tightening process.

[0031] In a specific embodiment, a connecting portion 40 is provided between the rotating handle 10 and the latch 20, and the connecting portion 40 is provided with a penetration notch 30 for the sleeve to pass through. Such a design can make it easier for the sleeve to pass through the rotating handle 10, which is convenient for operation, and can also extend the length of the entire tightening device, making it more operable and further improving the flexibility of operation.

[0032] In a preferred embodiment, the connection part 40 includes a first connection part 41 and a second connection part 42, the first connection part 41 and the second connection part 42 form a step, and the latch 20 is arranged on the outer side wall of the second connection part 42. This structure can improve the stability and durability of the device. This design allows the latch 20 to be more firmly inserted into the clamping hole. At the same time, the formation of the step can form a positioning limit for the tightening device, which better matches the narrow environment on site.

[0033] In a preferred embodiment, the width or diameter of the second connecting portion 42 is smaller than the width or diameter of the first connecting portion 41. In this way, a step can be formed, which is convenient for reducing the weight of the entire device and making it easier for the operator to operate.

[0034] In a preferred embodiment, the latch 20 is detachably connected to the connecting portion 40. Such a design facilitates the replacement of a damaged latch 20. The detachable design makes the maintenance and replacement of the device very convenient, thereby extending the service life of the device. The number and position of the latch 20 can also be adjusted as needed.

[0035] In a preferred embodiment, the latch 20 is detachably connected to the rotating handle 10, which further enhances the flexibility and maintainability of the device, facilitates maintenance and replacement, and prolongs the service life of the device.

[0036] In a preferred embodiment, the rotating handle 10 is provided with anti-skid grooves or anti-skid protrusions on the axial outer wall to increase friction, thereby improving safety and stability during operation and preventing accidents caused by hand slippage.

[0037] In a preferred embodiment, the rotating handle 10 is a disc structure, which is convenient for holding and operating. Further, the size of the rotating handle 10 is preferably matched with the size of a human palm, so that it can be grasped and rotated by one hand.

[0038] In a preferred embodiment, the length of the latch pin 20 is at least 1 / 2 of the depth of the clamping hole on the sealing segment nut, so as to ensure that the latch pin 20 can be firmly inserted into the clamping hole and provide sufficient tightening torque.

[0039] In general, the nuclear power plant sealing section nut tightening device of the utility model greatly improves the tightening efficiency and safety of the nuclear power plant sealing section nut through simple structural design and humanized operation mode.

[0040] The nuclear power plant sealing section tightening device of the utility model has at least the following beneficial effects:

[0041] 1. Simple structure, easy operation, can quickly and effectively complete the nut tightening work.

[0042] 2. The detachable design of the latch and the rotating handle makes the device more flexible and can be adjusted and maintained according to actual needs.

[0043] 3. The anti-slip design improves the safety of operation and reduces work risks.

[0044] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A nut tightening device for a sealing section of a nuclear power plant, characterized in that: The utility model comprises a rotating handle and at least one latch arranged on one side of the rotating handle, wherein the latch is inserted into a clamping hole on a sealing section nut, and a penetration notch for a sleeve to pass through is opened on the rotating handle.

2. The nuclear power plant sealing section nut tightening device according to claim 1, characterized in that: There are two latches, and the two latches are arranged corresponding to the two clamping holes on the sealing section nut.

3. The nuclear power plant sealing section nut tightening device according to claim 1, characterized in that: A connecting portion is provided between the rotating handle and the latch, and the connecting portion is provided with a penetration notch for the sleeve to pass through.

4. The nuclear power plant sealing section nut tightening device according to claim 3, characterized in that: The connecting portion includes a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion form a step, and the latch is arranged on an outer side wall of the second connecting portion.

5. The nuclear power plant sealing section nut tightening device according to claim 4, characterized in that: The width or diameter of the second connecting portion is smaller than the width or diameter of the first connecting portion.

6. The nuclear power plant sealing section nut tightening device according to claim 4, characterized in that: The latch is detachably connected to the connecting portion.

7. The nuclear power plant sealing section nut tightening device according to claim 1, characterized in that: The latch is detachably connected to the rotating handle.

8. The nuclear power plant sealing section nut tightening device according to claim 1, characterized in that: An anti-skid groove or an anti-skid protrusion is arranged on the axial outer wall of the rotating handle.

9. The nuclear power plant sealing section nut tightening device according to claim 1, characterized in that: The rotating handle is a disc structure.

10. The nuclear power plant sealing section nut tightening device according to claim 1, characterized in that: The length of the latch pin is at least 1 / 2 of the depth of the clamping hole on the sealing segment nut.

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