Plugging device for preventing falling of foreign matters in voltage stabilizer

Abstract

The invention discloses a plugging device for preventing falling of foreign matters in a voltage stabilizer, and relates to the technical field of voltage stabilizers, the plugging device comprises a supporting assembly and a connecting rod mechanism arranged on one side of the supporting assembly and unfolded or folded under the driving effect; the plugging assembly is arranged on one side of the connecting rod mechanism, and the plugging assembly can be unfolded and attached to the inner wall of the voltage stabilizer when the connecting rod mechanism is unfolded; the driving control mechanism is used for controlling the supporting assembly and the connecting rod mechanism to act; through collaborative design of the supporting assembly, the connecting rod mechanism and the plugging assembly, plugging of the interior of the voltage stabilizer is achieved, and foreign matter is prevented from falling to the bottom or a lower key area of the voltage stabilizer; the problem that the plugging effect is poor due to the fact that an existing foreign matter preventing method is inconvenient to install and operate and incomplete in covering is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage stabilizers, in particular to a blocking device for preventing foreign matter from falling inside a voltage stabilizer. Background Art

[0002] During the operation and maintenance of nuclear power plants, the pressurizer, a key component of the reactor coolant system, maintains pressure stability in the primary circuit and prevents overpressure or underpressure accidents. Due to the complex internal structure of the pressurizer and its high-temperature and high-pressure operating environment, access to the equipment requires opening a manhole for maintenance, cleaning, or component replacement. However, during maintenance, tools, bolts, or other foreign objects can accidentally fall to the bottom of the pressurizer or into the lower piping, causing damage, blockage, or even serious safety accidents.

[0003] To ensure the safety and effectiveness of maintenance work, it is often necessary to install a foreign object prevention device before maintenance to effectively intercept any falling foreign objects and prevent them from entering critical equipment or pipeline areas. Traditional methods of preventing foreign objects typically involve laying protective nets, hanging nets, or using baffles under manholes. These methods are difficult to install and operate, and their incomplete coverage results in poor blocking effectiveness, making them unable to meet the high safety and reliability requirements of nuclear power plants. Summary of the Invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a sealing device for preventing foreign objects from falling inside a voltage stabilizer, in order to solve the problem that the existing foreign object prevention method is inconvenient to install and operate and has incomplete coverage resulting in poor sealing effect.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a blocking device for preventing foreign matter from falling inside a voltage stabilizer, comprising a support assembly, a connecting rod mechanism provided on one side of the support assembly and capable of being expanded or retracted under driving action;

[0007] a blocking assembly provided on one side of the connecting rod mechanism, wherein the blocking assembly can be deployed and fit against the inner wall of the pressurizer when the connecting rod mechanism is deployed;

[0008] and a drive control mechanism for controlling the actions of the support assembly and the connecting rod mechanism.

[0009] As a preferred solution of the blocking device for preventing foreign matter from falling inside a voltage stabilizer according to the present invention, the support assembly includes a mounting member and a hinged rod provided on one side of the mounting member;

[0010] An angle driving mechanism is provided between the mounting member and the hinged rod;

[0011] A lifting drive mechanism is provided inside the hinged rod, and the lifting drive mechanism includes a driving motor, a threaded rod provided on one side of the driving motor, and a connecting rod provided on one side of the threaded rod.

[0012] The angle between the hinge rod and the mounting member can be adjusted by the angle drive mechanism, so that the entire device can adapt to stabilizers in different axial positions. The height adjustment of the lifting drive mechanism can adapt to stabilizer cavities of different heights.

[0013] As a preferred solution of the sealing device for preventing foreign objects from falling inside the voltage stabilizer described in the present invention, the mounting member includes a mounting rod and a mounting seat arranged on one side of the mounting rod, and a telescopic drive mechanism is provided between the mounting rod and the mounting seat.

[0014] Adjust the length of the mounting rod through the telescopic drive mechanism to ensure that the axis of the entire device coincides with the axis of the stabilizer, thereby improving the centering of the device;

[0015] As a preferred solution of the sealing device for preventing foreign objects from falling inside the stabilizer, the connecting rod mechanism includes a fixed plate arranged outside the connecting rod, a sliding rod arranged on one side of the fixed plate, and a support rod arranged on one side of the sliding rod.

[0016] The fixed plate serves as the basic platform of the connecting rod mechanism, which can provide reliable support for the sliding rod and the support rod; the sliding rod and the support rod cooperate with each other to realize the expansion and contraction of the blocking assembly.

[0017] As a preferred solution of the sealing device for preventing foreign objects from falling inside the voltage stabilizer described in the present invention, a connecting plate is provided on one side of the hinged rod, and an expansion drive mechanism is provided on one side of the connecting plate, and the other side of the expansion drive mechanism is connected to the fixed plate.

[0018] By deploying the driving mechanism to drive the fixed plate to move, the connecting rod mechanism can be quickly deployed or retracted.

[0019] As a preferred solution of the sealing device for preventing foreign objects from falling inside a voltage stabilizer according to the present invention, the sealing assembly includes a sealing surface and an anti-slip gasket arranged around the sealing surface.

[0020] The sealing surface can catch any falling tools or parts to prevent them from falling to the bottom of the stabilizer; the circumferentially arranged anti-slip washers increase the friction between the sealing surface and the inner wall of the stabilizer to prevent the sealing assembly from slipping. At the same time, the anti-slip washers can compensate for local gaps between the sealing surface and the inner wall (such as weld protrusions) to achieve full-area sealing.

[0021] As a preferred solution of the sealing device for preventing foreign objects from falling inside a voltage stabilizer according to the present invention, the edge of the sealing surface is connected to the support rod.

[0022] By connecting the edge of the sealing surface with the support rod, the flatness and tension of the sealing surface in the unfolded state can be ensured.

[0023] As a preferred solution of the sealing device for preventing foreign objects from falling inside a voltage stabilizer according to the present invention, the sealing surface includes a surface layer, a middle layer and a bottom layer.

[0024] The multi-layer composite structure can take into account multiple properties such as strength, high temperature resistance, radiation resistance, and sealing, and is better suitable for the long-term use requirements of nuclear power plant stabilizers under complex working conditions.

[0025] As a preferred solution of the blocking device for preventing foreign matter from falling inside the voltage stabilizer according to the present invention, a limiting member is provided on the mounting rod.

[0026] The limiter can block the manhole after the blocking device is fully deployed to prevent foreign matter from entering the stabilizer. It also plays a positioning and locking role to prevent the device from falling off due to vibration or misoperation.

[0027] Beneficial effects of this program:

[0028] The connecting rod mechanism of the present invention can be automatically expanded or retracted under driving action, thereby improving operational efficiency and safety; the blocking component can be tightly attached to the inner wall of the stabilizer after the connecting rod mechanism is expanded, thereby forming an effective blockage to prevent foreign matter from falling into the critical area; the present invention realizes the blocking of the inside of the stabilizer through the coordinated design of the support component, the connecting rod mechanism and the blocking component; the drive control mechanism coordinates the actions of various components in a unified manner, thereby improving the degree of automation and ease of use; and solves the problem that the existing anti-foreign matter method is inconvenient to install and operate and the incomplete coverage leads to poor sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of a blocking device used to prevent foreign objects from falling inside a voltage stabilizer.

[0031] Figure 2 This is a schematic diagram of the internal structure of the blocking device used to prevent foreign objects from falling inside the stabilizer.

[0032] Figure 3This is a schematic diagram of the connecting rod mechanism structure of the sealing device used to prevent foreign objects from falling inside the stabilizer.

[0033] Figure 4 This is a schematic diagram of a sealing device placed inside the voltage stabilizer to prevent foreign objects from falling.

[0034] 1. Support assembly; 11. Mounting part; 111. Mounting rod; 112. Mounting seat; 12. Articulated rod; 121. Connecting plate; 2. Connecting rod mechanism; 21. Fixed plate; 22. Sliding rod; 23. Support rod; 3. Sealing assembly; 31. Sealing surface; 32. Anti-slip washer; 4. Drive control mechanism; 41. Angle drive mechanism; 42. Lifting drive mechanism; 421. Drive motor; 422. Threaded rod; 423. Connecting rod; 43. Telescopic drive mechanism; 44. Deployment drive mechanism; 5. Limiting member. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it constitute a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Example 1

[0039] Reference Figure 1-Figure 4 , which is the first embodiment of the present invention, provides a sealing device for preventing foreign objects from falling inside a stabilizer, including a support assembly 1, a connecting rod mechanism 2 arranged on one side of the support assembly 1 and expanded or retracted under driving action; a sealing assembly 3 arranged on one side of the connecting rod mechanism 2, which can be expanded and attached to the inner wall of the stabilizer when the connecting rod mechanism 2 is expanded; and a drive control mechanism 4 for controlling the actions of the support assembly 1 and the connecting rod mechanism 2.

[0040] It should be noted that the support assembly 1 is adjustable and retractable, and the blocking assembly 3 can be deployed and aligned with the inner wall of the pressurizer when the connecting rod mechanism 2 is deployed, thereby sealing the internal space of the pressurizer. The blocking device of this embodiment is deployed after entering the interior of the pressurizer through the manhole, and prevents foreign matter from falling into the bottom or lower critical area of ​​the pressurizer during maintenance.

[0041] Furthermore, the support assembly 1 includes a mounting member 11 and a hinge rod 12 provided on one side of the mounting member 11;

[0042] An angle driving mechanism 41 is provided between the mounting member 11 and the hinge rod 12;

[0043] A lifting drive mechanism 42 is provided inside the hinge rod 12 . The lifting drive mechanism 42 includes a driving motor 421 , a threaded rod 422 provided on one side of the driving motor 421 , and a connecting rod 423 provided on one side of the threaded rod 422 .

[0044] It should be noted that the angle drive mechanism 41 is mounted on one side of the mounting member 11 and the articulated rod 12 via a bracket and a fixing seat to adjust the angle between them. The articulated rod 12 has a slot inside it, and one end of the drive motor 421 is fixed to the top of the slot. The other end is connected to the threaded rod 422, driving the threaded rod 422 to rotate. The connecting rod 423 has a threaded hole inside it, and the threaded rod 422 and the connecting rod 423 are threadedly connected. When the drive motor 421 drives the threaded rod 422 to rotate, the threaded rod 422 can drive the connecting rod 423 to move vertically. The connecting rod 423 passes through the articulated rod 12 and is connected to the linkage 2. The angle drive mechanism 41 can be any of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

[0045] Furthermore, the mounting member 11 includes a mounting rod 111 and a mounting seat 112 disposed on one side of the mounting rod 111 , and a telescopic driving mechanism 43 is disposed between the mounting rod 111 and the mounting seat 112 .

[0046] It should be noted that a slot is formed inside the mounting rod 111. One end of the telescopic drive mechanism 43 is fixed to the top of the slot, and the other end is fixed to the mounting seat 112. The mounting rod 111 and the mounting seat 112 abut against each other, allowing the telescopic drive mechanism 43 to adjust the length of the mounting rod 111 so that the axis of the articulated rod 12 is aligned with the axis of the voltage stabilizer. A mounting plate is provided on one side of the mounting seat 112, and a hinge plate is provided on one side of the articulated rod 12. The mounting plate and the hinge plate are connected by a rotating shaft, thereby achieving an articulated connection between the mounting member 11 and the articulated rod 12. The telescopic drive mechanism 43 can be any of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

[0047] Example 2

[0048] Reference Figure 1-Figure 4, which is the second embodiment of the present invention. This embodiment is different from the previous embodiment in that the connecting rod mechanism 2 includes a fixed plate 21 arranged outside the connecting rod 423, a sliding rod 22 arranged on one side of the fixed plate 21, and a support rod 23 arranged on one side of the sliding rod 22.

[0049] It should be noted that the fixed plate 21 is sleeved onto the exterior of the connecting rod 423. A sliding rod 22 is connected to one side of the fixed plate 21. The other end of the sliding rod 22 is slidably connected to the support rod 23. A sliding groove is provided in the middle of the support rod 23 for the sliding rod 22 to move. The sliding rod 22 and the support rod 23 are arranged in pairs. In this embodiment, there are four sliding rods 22 and four support rods 23, but six or eight can be adjusted depending on the situation. One end of the support rod 23 is connected to the blocking assembly 3, and the other end is connected to the connecting rod 423, making it easy to expand or collapse the blocking assembly 3.

[0050] Furthermore, a connecting plate 121 is provided on one side of the hinge rod 12 , and an unfolding driving mechanism 44 is provided on one side of the connecting plate 121 , and the other side of the unfolding driving mechanism 44 is connected to the fixing plate 21 .

[0051] It should be noted that a through hole is provided in the middle of the connecting plate 121 for the connecting rod 423 to pass through. The connecting plate 121 is fixedly connected to the hinge rod 12. An expansion drive mechanism 44 is fixed at one end to the connecting plate 121 and at the other end to the fixed plate 21, thereby driving the fixed plate 21 to move up and down along the connecting rod 423. The expansion drive mechanism 44 can be a hydraulic cylinder, a pneumatic cylinder, or an electric push rod. The expansion drive mechanism 44 drives the fixed plate 21 to move up and down, thereby driving the sliding rod 22 to slide on the support rod 23, thereby achieving the expansion and contraction of the blocking assembly 3.

[0052] Example 3

[0053] Reference Figure 1-Figure 4 , which is the third embodiment of the present invention. This embodiment is different from the previous two embodiments in that the blocking assembly 3 includes a blocking surface 31 and an anti-slip washer 32 arranged on the circumference of the blocking surface 31.

[0054] Furthermore, the edge of the blocking surface 31 is connected to the support rod 23 .

[0055] It should be noted that the shape of the sealing surface 31 is adapted to the inner wall contour of the stabilizer, and the diameter after being propped up is the same as or larger than the inner diameter of the stabilizer, so as to achieve comprehensive sealing. Generally, the diameter after being propped up is larger than the inner diameter of the stabilizer, so that a dome-shaped sealing surface is formed when it is unfolded, and the center droops to form a buffer groove, which can more effectively receive foreign matter.

[0056] In order to ensure that the blocking surface 31 is evenly stressed, a groove can be provided at the center of the blocking surface 31 to connect with the fixed ball at the bottom of the connecting rod 423. At the same time, the center point connection can provide an initial positioning reference to ensure that the blocking surface 31 is deployed in the center.

[0057] The anti-slip washer 32 can ensure a close fit between the sealing surface 31 and the interior of the stabilizer and prevent accidental sliding when foreign objects fall.

[0058] Furthermore, the sealing surface 31 includes a surface layer, a middle layer and a bottom layer.

[0059] It should be noted that, considering the complex environment inside the regulator, the material of the sealing surface 31 adopts a multi-layer composite structure. The surface layer can use a corrosion-resistant coating (such as PTFE-coated stainless steel) or expanded polytetrafluoroethylene (ePTFE) membrane to provide sealing, corrosion resistance, anti-sticking, and friction reduction. The middle layer can use high-temperature insulation or buffer materials (such as ceramic fiber, silicone rubber, or methyl vinyl silicone rubber) to provide heat insulation and shock absorption. The bottom layer can be made of stainless steel or carbon fiber reinforced composite materials to ensure the strength of the overall structure and support the shape of the sealing surface 31. To ensure the strength of the sealing surface 31, a metal skeleton can also be embedded at its edge.

[0060] Example 4

[0061] Reference Figure 1-Figure 4 , which is the fourth embodiment of the present invention. This embodiment is different from the previous three embodiments in that a limiting member 5 is provided on the mounting rod 111.

[0062] It should be noted that the limiter 5 adopts a chuck structure that can be locked to the manhole flange, and can also be a limit block or a limit ring. A limit groove is set in the limiter 5, the limit groove is "L"-shaped, and a limit protrusion is set on the mounting rod 111; when the sealing assembly 3 is fully expanded, the limiter 5 can be used to seal the manhole of the voltage stabilizer to prevent external foreign matter from entering the interior of the voltage stabilizer.

[0063] The specific method of using the blocking device for preventing foreign matter from falling inside a voltage stabilizer of the present invention is as follows:

[0064] a) Place the folded device into the pressure stabilizer through the manhole;

[0065] b) adjusting the angle of the hinged rod 12 by the angle drive mechanism 41 and adjusting the length of the mounting rod 111 by the telescopic drive mechanism 43 so that the axis of the hinged rod 12 is aligned with the axis of the stabilizer;

[0066] c) driving the lifting drive mechanism 42 to move the connecting rod 423 downward to the target depth;

[0067] d) Activating the expansion drive mechanism 44 to push the fixed plate 21 downward, driving the support rod 23 and the sliding rod 22 to radially expand until the blocking assembly 3 is in contact with the inner wall of the pressurizer;

[0068] e) Lock the manhole with the stopper 5.

[0069] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A blocking device for preventing foreign matter from falling inside a voltage stabilizer, characterized by: include, A support assembly (1), a connecting rod mechanism (2) arranged on one side of the support assembly (1) and capable of being expanded or retracted under driving action; a blocking component (3) provided on one side of the connecting rod mechanism (2), wherein the blocking component (3) is capable of being unfolded and attached to the inner wall of the stabilizer when the connecting rod mechanism (2) is unfolded; and a drive control mechanism (4) for controlling the actions of the support assembly (1) and the connecting rod mechanism (2).

2. The blocking device for preventing foreign matter from falling inside a voltage stabilizer according to claim 1, characterized in that: The support assembly (1) comprises a mounting member (11) and a hinge rod (12) arranged on one side of the mounting member (11); An angle driving mechanism (41) is provided between the mounting member (11) and the hinge rod (12); A lifting drive mechanism (42) is provided inside the hinged rod (12), and the lifting drive mechanism (42) includes a driving motor (421), a threaded rod (422) provided on one side of the driving motor (421), and a connecting rod (423) provided on one side of the threaded rod (422).

3. The blocking device for preventing foreign matter from falling inside a voltage stabilizer according to claim 2, characterized in that: The mounting member (11) comprises a mounting rod (111) and a mounting seat (112) arranged on one side of the mounting rod (111); a telescopic driving mechanism (43) is arranged between the mounting rod (111) and the mounting seat (112).

4. The blocking device for preventing foreign matter from falling inside a voltage stabilizer according to claim 2, characterized in that: The connecting rod mechanism (2) comprises a fixed plate (21) arranged outside the connecting rod (423), a sliding rod (22) arranged on one side of the fixed plate (21), and a supporting rod (23) arranged on one side of the sliding rod (22).

5. The blocking device for preventing foreign matter from falling inside a voltage stabilizer according to claim 4, characterized in that: A connecting plate (121) is provided on one side of the hinged rod (12), and an unfolding drive mechanism (44) is provided on one side of the connecting plate (121), and the other side of the unfolding drive mechanism (44) is connected to the fixing plate (21).

6. The blocking device for preventing foreign matter from falling inside a voltage stabilizer according to claim 2, characterized in that: The blocking assembly (3) comprises a blocking surface (31) and an anti-slip washer (32) arranged in the circumferential direction of the blocking surface (31).

7. The blocking device for preventing foreign matter from falling inside a voltage stabilizer according to claim 6, characterized in that: The edge of the sealing surface (31) is connected to the support rod (23).

8. The blocking device for preventing foreign matter from falling inside a voltage stabilizer according to claim 6, characterized in that: The sealing surface (31) comprises a surface layer, a middle layer and a bottom layer.

9. The blocking device for preventing foreign matter from falling inside a voltage stabilizer according to claim 3, characterized in that: A limiting member (5) is provided on the installation rod (111).

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