Personnel air lock mounting tool and mounting method

Abstract

The invention provides a personnel air lock mounting tool which is used for mounting a circular cylinder of a personnel air lock, the mounting tool comprises a first part and a second part, and the first part and the second part are consistent in structure and are symmetrically arranged along the central axis of the circular cylinder. Each of the first part and the second part comprises a first side and a second side, the first side and the second side are two opposite sides, the first side is matched with the side wall of the barrel, the second side comprises a supporting area and an adjusting area, the supporting area is used for being in contact with a supporting surface for supporting, the adjusting area is used for being connected with a height adjusting mechanism, and the supporting area and the adjusting area are located on planes with different heights. The third side of the first part is tightly attached to the third side of the second part, splicing of the first part and the second part is achieved, and the third side is located between the first side and the second side.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power plant equipment, and in particular to a personnel gate installation tool and an installation method. Background Art

[0002] The overall sealing performance of the CAP1000 steel containment vessel (CV) used in nuclear power plants is crucial to ensuring the safe operation of the plant. Personnel gates are critical penetrations within the containment vessel. During operation, they ensure the containment of radioactive materials and allow personnel to enter and exit the containment vessel safely. In the event of an accident, they ensure the emergency evacuation of personnel from the accident area while maintaining the containment seal; contain radioactive materials within the accident area to prevent their spread; prevent fires; and protect the interior of the containment vessel from external objects, systems, or accidents that could cause radioactive material release.

[0003] The personnel gate consists of a circular through-cylinder and a plug-in plate. The through-cylinder and plug-in plate are key equipment connecting the main steam duct and the main steam diversion channel. They play an important role in controlling the main steam duct pressure of the nuclear power plant and ensuring the installation and operation of the nuclear power plant. Its working principle is that under normal operating conditions, the gate is inserted into the cylinder through the operating mechanism to achieve on-off control. In the event of an emergency, it can be opened in an emergency, effectively protecting the equipment and personnel of the nuclear power plant. Precise installation of the through-cylinder is key to ensuring the normal operation of the personnel gate. The installation of the cylinder requires that the misalignment between the plug-in plate and the cylinder be controlled within 3mm, and the angular error between the central axis of the cylinder and the theoretical position in both the radial and axial directions shall not exceed 0.5°. However, the cylinder is heavy, and using lifting equipment to install the cylinder cannot achieve precise adjustment. Moreover, the cylinder itself is easily damaged during the installation process. Summary of the Invention

[0004] The purpose of the present invention is at least to provide a personnel gate installation tool and installation method to support the cylinder and help accurately adjust the position of the installation cylinder.

[0005] The following is a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceivable aspects and is neither intended to identify key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be provided later.

[0006] One embodiment of the present invention provides a personnel gate installation tool for installing a circular cylinder included in the personnel gate, and the installation tool includes a first part and a second part.

[0007] The first part and the second part have the same structure and are symmetrically arranged along the central axis of the circular cylinder.

[0008] The first part and the second part both include a first side and a second side, the first side and the second side are opposite sides, the first side is adapted to the side wall of the cylinder, and the second side includes a support area and an adjustment area, the support area is used for contacting and supporting the support surface, and the adjustment area is used for connecting the height adjustment mechanism, and the support area and the adjustment area are located on planes of different heights.

[0009] The third side of the first part is in close contact with the third side of the second part, so as to realize the splicing of the first part and the second part, and the third side is located between the first side and the second side.

[0010] In some embodiments, the first side includes an arc surface adapted to the side wall of the cylinder, and an arc angle corresponding to the arc surface is greater than 20° and less than 90°.

[0011] In some embodiments, the support area of ​​the first portion and the support area of ​​the second portion are spliced ​​together to form a plane that is adapted to the support surface.

[0012] In some embodiments, the adjustment area includes a plane connected to the height adjustment mechanism, and the height of the plane of the adjustment area is higher than the height of the plane of the support area.

[0013] In some embodiments, the third side of the first portion is detachably connected to the third side of the second portion.

[0014] In some embodiments, the installation tool is a frame structure, and the first side and the second side are connected and supported by support rods or support plates.

[0015] One embodiment of the present invention provides a personnel gate installation method, using the above-mentioned personnel gate installation tool, the personnel gate installation method includes:

[0016] Determine the axial angle of the cylinder and the length of the cylinder.

[0017] The first and second parts of the installation tool are spliced ​​together, and at least two installation tools are arranged according to the axial angle and the length of the cylinder.

[0018] A height adjustment mechanism is connected to the adjustment area.

[0019] The hoisting cylinder is supported on the installation tooling, and the height of the height adjustment mechanism is adjusted so that the misalignment between the cylinder and the plug plate is less than 3mm, and then the angle error between the central axis of the cylinder and the theoretical position in the radial direction does not exceed 0.5°.

[0020] In some embodiments, the third side of the first portion is detachably connected to the third side of the second portion, and the personnel gate installation method includes:

[0021] After the personnel gate is installed, remove the connection between the first and second parts of the installation tooling, move the first and second parts away from each other on both sides symmetrically along the central axis of the cylinder, and withdraw the installation tooling from the bottom of the cylinder.

[0022] The personnel gate installation tooling involved in the present invention supports the cylinder body during the installation process of the personnel gate cylinder body, cooperates with the height adjustment mechanism, can accurately adjust the position of the cylinder body, ensures the accurate installation of the cylinder body, and enables the personnel gate function to operate smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above features and advantages of the present invention will be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, parts are not necessarily drawn to scale, and parts with similar related properties or characteristics may have the same or similar reference numerals. Among them:

[0024] Figure 1 This is a schematic diagram of the personnel gate on the containment vessel;

[0025] Figure 2 is a front view of a personnel gate installation tool according to some embodiments;

[0026] Figure 3 is a schematic diagram of an installation tool supported on an upper personnel gate according to some embodiments;

[0027] Figure 4 is a schematic diagram of an installation tool supported on a lower-level personnel gate according to some embodiments;

[0028] Figure 5 yes Figure 4 Middle AA cross-section;

[0029] Figure 6 yes Figure 4 Middle BB cross-section. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the various aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention.

[0031] It should be understood that the terms "system," "device," "unit," and / or "module" used herein are a method for distinguishing different parts, elements, components, parts, or assemblies at different levels. However, other terms may be used to replace a term if they can achieve the same purpose.

[0032] It is understood that the technical terms that may be involved in the description of this specification, such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., which indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the implementation methods, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the invention.

[0033] It should be noted that the use of words such as "first" and "second" to define features is only for the convenience of distinguishing the corresponding features. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention. As shown in this specification and claims, words such as "one", "a", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural, unless the context clearly indicates an exception. Generally speaking, the terms "comprises" and "includes" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0034] It should also be noted that, in the description of this specification, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connection, integral connection, or detachable connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this specification based on the specific circumstances.

[0035] The embodiment of this specification proposes a personnel gate installation tool. The personnel gate installation tool is used to install the circular cylinder included in the personnel gate. Figure 1As shown, a personnel gate is provided on the containment shell 1 of the nuclear power plant, including an upper personnel gate 11 and a lower personnel gate 12. The personnel gate passes through the containment shell 1, connecting the inside and outside of the containment shell 1, and is used to prevent radioactive substances from leaking inside the containment shell 1 and to allow personnel to enter and exit the containment shell safely. The personnel gate includes a plug plate and a circular cylinder. The circular cylinder and the plug plate are key equipment for connecting the main steam channel and the main steam diversion channel, and play an important role in controlling the main steam channel pressure of the nuclear power plant and ensuring the installation and operation of the nuclear power plant. The precise installation of the circular cylinder is the key to ensuring the normal operation of the personnel gate. The installation of the cylinder requires that the misalignment between the plug plate and the cylinder be controlled within 3mm to ensure that the plug plate and the cylinder can cooperate with each other, and the angle error between the central axis of the cylinder and the theoretical position in the radial and axial directions does not exceed 0.5°. The axial direction mentioned in this specification refers to the direction of the central axis of the cylinder, and the radial direction refers to the direction of the radius of the cylinder. The personnel gate installation tooling provided in the embodiment of this specification assists in the installation of the cylinder and enables precise adjustment of the position of the cylinder so that the installation position of the cylinder meets its installation requirements, thereby ensuring that the personnel gate can operate normally and the functions of the personnel gate can be smoothly realized.

[0036] Figure 2 is a front view of a personnel gate installation tool according to some embodiments.

[0037] like Figure 2 As shown, the installation tool 100 includes a first portion 110 and a second portion 120. The first portion 110 and the second portion 120 are two parts of the installation tool 100 with the same structure, and the first portion 110 and the second portion 120 are symmetrically arranged along the central axis of the circular cylinder.

[0038] The first portion 110 and the second portion 120 each include a first side 130 and a second side 140. The first side 130 and the second side 140 are opposite to each other.

[0039] The first side 130 is adapted to the sidewall of the cylinder. The sidewall of the circular cylinder is an arc surface extending along its axial direction. The first side 130 is also an arc surface extending along the axial direction of the circular cylinder. The arc angle corresponding to the arc surface formed by the first side 130 is greater than 20° and less than 90°. The arc angle corresponding to the arc surface formed by the first side 130 of the first part 110 and the first side 130 of the second part 120 after splicing is greater than 40° and less than 180°. The arc angle corresponding to the arc surface formed by the first side 130 of the first part 110 and the first side 130 of the second part 120 after splicing is greater than 40°, which facilitates the first side 130 of the installation tool 100 to stably support the circular cylinder. The arc angle corresponding to the arc surface formed by the first side 130 of the first part 110 and the first side 130 of the second part 120 after splicing is less than 180°, so that the circular cylinder can be smoothly lowered to the first side 130 for support when it is hoisted.

[0040] The second side 140 includes a support area 141 and an adjustment area 142. The support area 141 is used to contact and support a support surface (such as the ground, a temporary platform, etc.). The support area 141 of the first part 110 and the support area 141 of the second part 120 are spliced ​​to form a plane that adapts to the support surface. The plane extends along the central axis of the circular cylinder and is parallel to the central axis of the circular cylinder.

[0041] The adjustment area 142 is used to connect a height adjustment mechanism, such as a jack. The adjustment area 142 includes a plane connected to the height adjustment mechanism, which extends along the central axis of the circular cylinder and is parallel to the central axis of the circular cylinder. Figure 2 As shown, the support area 142 and the adjustment area 141 are located on planes at different heights, with the plane height of the adjustment area 142 being higher than the plane height of the support area 141. The adjustment area 142 is recessed from the support area 141, resulting in a height difference between the adjustment area 142 and the support area 141. The presence of the height difference area facilitates the installation of a height adjustment mechanism.

[0042] The installation tool 100 is a frame structure as a whole. The first side 130 and the second side 140 are connected and supported by a support rod or support plate 150. In some embodiments, the support rod or support plate 150 between the first side 130 and the second side 140 is vertically arranged. In some embodiments, in order to strengthen the structural strength of the installation tool 100, a support plate 150 is provided between the first side 130 and the second side 140. When the first part 110 and the second part 120 are spliced ​​together, the first part 110 and the second part 120 are close to each other in the horizontal direction until the third side 160 of the first part 110 is in close contact with the third side 160 of the second part 120. The vertical direction mentioned in this specification refers to the direction of gravity of the circular cylinder, and the horizontal direction refers to the direction perpendicular to the vertical and axial directions. The vertical and horizontal directions here are the same as Figure 2 The vertical and horizontal directions in the illustrated view are consistent. The third side 160 is located between the first side 130 and the second side 140, and the third side 160 is a support plate structure. In some embodiments, in order to achieve a stable splicing of the first part 110 and the second part 120 and ensure the safety of the support of the installation tool 100 on the circular cylinder, the third side 160 of the first part 110 and the third side 160 of the second part 120 are detachably connected. For example, Figure 2 As shown, the third side 160 of the first portion 110 is detachably connected to the third side 160 of the second portion 120 by three bolts 161. After the personnel gate is installed, the detachable connection is released, and the first portion 110 and the second portion 120 are moved laterally away from each other and removed from both sides of the central axis of the circular cylinder.

[0043] Figure 3 is a schematic diagram of an installation tool supported on an upper personnel gate according to some embodiments. Figure 4 is a schematic diagram of an installation tool supported on a lower-level personnel gate according to some embodiments.

[0044] In some embodiments, the installation tool 100 can be used to Figure 1 Installation of the middle and upper personnel gate 11 or the lower personnel gate 12. Figure 3 As shown, when the installation tool 100 is used to install the upper personnel gate 11, the cylinder 11-1 of the upper personnel gate 11 is supported on at least two installation tools 100. One installation tool 100 can be placed on the floor 31 set in the containment shell, and the second installation tool 100 can be placed on the temporary reinforcement rib 32 to support one end of the suspended cylinder 11-1. Figure 4 As shown, when the installation tool 100 is used to install the lower personnel gate 12, the cylinder 12-1 of the lower personnel gate 12 is supported on at least two installation tools 100. One installation tool 100 can be placed on the ground, and the second installation tool 100 can be placed on a temporary support platform 42 to support one end of the suspended cylinder 12-1. A height adjustment mechanism is set between the installation tool 100 and the supporting surface, such as the floor 31, the stiffening rib 32, the ground 41 or the support platform 42, etc., to adjust the precise position of the cylinder. Figure 5 and Figure 6 Illustrate the location of the height adjustment mechanism.

[0045] Figure 5 yes Figure 4 Middle AA cross-section. Figure 6 yes Figure 4 Middle BB cross-section.

[0046] like Figure 5 As shown, height adjustment mechanisms 200 are provided between the first portion 110 and the second portion 120 of the installation tool 100 and the support platform 42. Specifically, the height adjustment mechanisms 200 are positioned between the adjustment areas 141 of the first portion 110 and the second portion 120 and the support platform 42. In some embodiments, two height adjustment mechanisms 200 are provided between the first portion 110 and the second portion 120 and the support platform 42, symmetrically arranged along the central axis of the cylinder 12-1, to facilitate symmetrical adjustment of the position of the cylinder 12-1 by the two height adjustment mechanisms 200.

[0047] like Figure 6 As shown, height adjustment mechanisms 200 are provided between the first portion 110 and the second portion 120 of the installation tool 100 and the ground 41. Specifically, the height adjustment mechanisms 200 are positioned between the adjustment area 141 of the first portion 110 and the second portion 120 and the ground 41. In some embodiments, two height adjustment mechanisms 200 are provided between the first portion 110 and the second portion 120 and the support platform 42, symmetrically arranged along the central axis of the cylinder 12-1, to facilitate symmetrical adjustment of the position of the cylinder 12-1 by the two height adjustment mechanisms 200.

[0048] The embodiment of this specification also proposes a personnel gate installation method, which includes the following steps.

[0049] Step S1, determining the axial angle and length of the cylinder. For example, the axial angle of the cylinder is measured in advance using a total station, and the axial angle of the cylinder is consistent with the axial angle of the personnel gate.

[0050] Step S2: Assemble the first and second parts of the installation tool. The placement of the installation tool can be determined based on the axial angle and length of the cylinder, and at least two installation tools are placed. The at least two installation tools are installed along the axial direction of the cylinder, and the axial coverage length of the at least two installation tools is close to or slightly less than the length of the cylinder.

[0051] Step S3: Connecting a height adjustment mechanism to the adjustment area.

[0052] Step S4, the hoisting cylinder is supported on the installation tool, and the height of the height adjustment mechanism is adjusted so that the misalignment between the cylinder and the plug plate is less than 3 mm, and then the angle error between the central axis of the cylinder and the theoretical position in the radial direction does not exceed 0.5°.

[0053] Step S5, after the personnel gate is installed, the connection between the first part and the second part of the installation tool is removed, and the first part and the second part are moved away from each other on both sides symmetrically along the central axis of the cylinder, and the installation tool is withdrawn from the bottom of the cylinder.

[0054] The installation tooling covered in this manual supports the cylinder during the installation of the personnel gate cylinder and cooperates with the height adjustment mechanism to accurately adjust the position of the cylinder, ensuring accurate installation of the cylinder and enabling the personnel gate to function smoothly.

[0055] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. In addition, unless expressly stated in the claims, the order of elements and sequences, the use of alphanumeric characters, or the use of other names in this specification are not intended to limit the order of the processes and methods in this specification. Although some embodiments of the invention currently considered useful are discussed through various examples in the above disclosure, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of this specification.

Claims

1. A personnel gate installation tool for installing the circular cylinder included in the personnel gate, characterized in that: The installation tool comprises a first part and a second part; The first part and the second part have the same structure and are symmetrically arranged along the central axis of the circular cylinder; The first portion and the second portion each include a first side and a second side, the first side and the second side being opposite to each other, the first side being adapted to the side wall of the cylinder, the second side including a support area and an adjustment area, the support area being configured to contact and support the support surface, the adjustment area being configured to connect to a height adjustment mechanism, the support area and the adjustment area being located on planes at different heights; The third side of the first part is in close contact with the third side of the second part, so as to realize the splicing of the first part and the second part, and the third side is located between the first side and the second side.

2. The personnel gate installation tool according to claim 1, characterized in that: The first side includes an arc surface adapted to the side wall of the cylinder, and an arc angle corresponding to the arc surface is greater than 20° and less than 90°.

3. The personnel gate installation tool according to claim 1, characterized in that: The support area of ​​the first part and the support area of ​​the second part are spliced ​​to form a plane adapted to the support surface.

4. The personnel gate installation tool according to claim 3, characterized in that: The adjustment area includes a plane connected to the height adjustment mechanism, and the plane height of the adjustment area is higher than the plane height of the support area.

5. The personnel gate installation tool according to claim 1, characterized in that: The third side of the first portion is detachably connected to the third side of the second portion.

6. The personnel gate installation tool according to claim 1, characterized in that: The installation tool is a frame structure, and the first side and the second side are connected and supported by support rods or support plates.

7. A method for installing a personnel gate, characterized in that: Using the personnel gate installation tool according to any one of claims 1 to 6, the personnel gate installation method includes: determining the axial angle of the cylinder and the length of the cylinder; Splicing the first portion and the second portion of the installation tool, and placing at least two of the installation tools according to the axial angle and the length of the cylinder; Connecting the height adjustment mechanism to the adjustment area; The cylinder is hoisted and supported on the installation tool, and the height of the height adjustment mechanism is adjusted so that the misalignment between the cylinder and the plug plate is less than 3 mm, and then the angle error between the central axis of the cylinder and the theoretical position in the radial direction does not exceed 0.5°.

8. The method for installing a personnel gate according to claim 7, characterized in that: The third side of the first part is detachably connected to the third side of the second part, and the personnel gate installation method includes: After the personnel gate is installed, the connection between the first part and the second part of the installation tool is removed, and the first part and the second part are moved away from each other on both sides symmetrically along the central axis of the cylinder, and the installation tool is withdrawn from the bottom of the cylinder.

Images