Self-adapting inflation sealing mechanism and quick locking anti-loose device

Abstract

The utility model relates to the technical field of nuclear power plant equipment protection especially to a self -adaptation inflation sealing mechanism and fast lock anti -loose device, including, installation unit, including seal cover plate, the support base that is vertically fixed in the seal cover plate upper surface center, inflation unit, including the seal air bag of annular cover in support base outer periphery surface, the inflation part that is set up in support base inside. The utility model's clamping plate presss tight flange upper surface, provides axial restraint, and the double insurance that forms with air bag radial fixed, the design of rotating clamping plate and screw rod elevating, spares bolt dismounting, and one person can lock and unlock fast.

Description

Technical Field

[0001] This utility model relates to the technical field of nuclear power plant equipment protection, and in particular to an adaptive gas filling and sealing mechanism and a quick-lock anti-loosening device. Background Technology

[0002] The main pump of a nuclear power plant is one of the key pieces of equipment in the nuclear reactor coolant system. During the installation of the main pump, due to the complex environment of the construction site, there are a large amount of dust, debris, and foreign objects such as tool parts of the construction personnel. Once these foreign objects enter the inlet and outlet of the main pump and then enter the pump, they can damage critical components such as the impeller and bearings, affecting the performance and lifespan of the main pump, and even causing serious safety accidents.

[0003] Currently, there are two main methods for protecting the inlet and outlet of the main pump in nuclear power plants. One method involves using sealing plates and bolts to install them at the inlet and outlet for sealing. While this method provides a good seal, the installation and disassembly process requires specialized tools, is cumbersome, and time-consuming, significantly reducing installation progress and increasing construction costs and risks. The other method involves covering the inlet and outlet with plastic film for protection. Although this method is relatively simple, the plastic film has low strength and is easily damaged by scratches and collisions from external objects during construction, leading to protection failure and ineffective prevention of foreign objects from entering the main pump. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems of cumbersome installation and disassembly of bolt-fixed sealing plates and low strength of plastic film covering in the above or existing technologies, this utility model is proposed.

[0006] Therefore, the purpose of this invention is to provide an adaptive inflation sealing mechanism.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an installation unit, including a sealing cover plate and a support base vertically fixed at the center of the upper surface of the sealing cover plate;

[0008] The inflation unit includes a sealed airbag annularly sleeved on the outer circumferential surface of the support base, and an inflation component opened inside the support base.

[0009] As a preferred embodiment of the adaptive inflation sealing mechanism of this utility model, the inflation component includes an inflation channel, a diversion channel disposed between the inflation channel and the sealing airbag, and an inflation connector disposed at the bottom of the sealing cover plate.

[0010] As a preferred embodiment of the adaptive inflation sealing mechanism of this utility model, the following are provided: an exhaust channel is arranged in parallel on the inflation channel, and an exhaust valve is arranged at the bottom of the sealing cover and connected to the exhaust channel.

[0011] As a preferred embodiment of the adaptive inflation sealing mechanism of this utility model, the sealing airbag surface is provided with anti-slip texture, and its annular inner diameter matches the outer diameter of the support base.

[0012] As a preferred embodiment of the adaptive inflation sealing mechanism of this utility model, it further includes a protective component, which includes a protective cover fixed to the bottom surface of the sealing cover plate and a protective cover disposed at the bottom of the protective cover.

[0013] Both the inflation connector and the exhaust valve are located inside the protective cover.

[0014] In a preferred embodiment of the adaptive inflation sealing mechanism of this utility model, handles are symmetrically arranged on both sides of the protective cover.

[0015] The beneficial effects of the adaptive inflation sealing mechanism of this utility model are as follows: after the airbag inflates, it fits against the inner wall of the pipe to form an annular sealing strip, blocking the entry of foreign objects. The inflation of the airbag generates huge radial friction force, realizing self-locking fixation and resisting vibration and displacement. The inflation and deflation valve design simplifies the process, and with the help of a portable air source, it greatly improves efficiency.

[0016] In actual use, there is still the problem of cumbersome installation and disassembly of the sealing plate by bolts.

[0017] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a connecting unit, including a fixed support rod, the lower end of which is fixed to the sealing cover plate, and a locking member disposed on the fixed support rod.

[0018] As a preferred embodiment of the quick-lock anti-loosening device of this utility model, the locking member includes a screw, a threaded hole opened on the fixed support rod, the screw being threadedly connected in the threaded hole, a movable support rod fixed at the upper end of the screw, the movable support rod having the same diameter as the fixed support rod, a slot opened transversely through the upper end face of the movable support rod, a pin set in the slot, and a locking plate rotatably connected to the movable support rod through the pin and adapted to be locked in the slot.

[0019] In a preferred embodiment of the quick-lock anti-loosening device of this utility model, both the fixed support rod and the movable support rod are fitted with plastic protective sleeves at their bottoms.

[0020] As a preferred embodiment of the quick-lock anti-loosening device of this utility model, the locking plate can rotate 0-90° around the pin shaft, and its locking contact surface has a serrated texture.

[0021] The beneficial effects of this utility model are: the clamping plate presses against the upper surface of the flange, providing axial constraint force, forming a double insurance with the radial fixation of the airbag; the design of rotating the clamping plate and lifting the screw eliminates the need for bolt disassembly and assembly, allowing a single person to quickly lock and unlock. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0023] Figure 1 This is a schematic diagram of the overall structure of the adaptive air-filling sealing mechanism of this utility model.

[0024] Figure 2 This is a cross-sectional view of the inflation unit in the adaptive inflation sealing mechanism of this utility model.

[0025] Figure 3 This is a bottom view of the overall structure of the adaptive air-filling sealing mechanism of this utility model.

[0026] Figure 4 This is a schematic diagram of the overall structure of the quick-lock anti-loosening device of this utility model.

[0027] Figure 5 This is an anatomical diagram of the overall structure of the quick-lock anti-loosening device of this utility model. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide 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 can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used 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 different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0031] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0032] Example 1

[0033] Reference Figures 1 to 3 This is the first embodiment of the present invention, which provides an adaptive inflatable sealing mechanism, including an installation unit 1 and an inflation unit 2. A rapid and reliable seal and friction fixation are achieved through the inflated sealing airbag 21.

[0034] The support base 12 is fixedly mounted at the center of the upper side of the sealing cover plate 11. It is a rigid columnar structure, serving as a guide and support for insertion into the main pump inlet and outlet. A central inflation channel 221 is axially formed inside the support base 12. Symmetrical diversion channels 222 are arranged on the lower left and right sides of the inflation channel 221 to uniformly guide gas into the inner cavity of the sealing airbag 21. The sealing airbag 21 is an annular structure, fitted onto the outer ring surface of the support base 12. It is made of rubber or synthetic materials with excellent elasticity, wear resistance, resistance to the nuclear island environment, and good airtightness. The outer surface of the sealing airbag 21 has anti-slip textures 226 of specific depth and spacing, greatly enhancing the friction and sealing fit between it and the inner wall of the inlet and outlet after expansion. The inner cavity of the sealing airbag 21 is connected to the inflation channel 221 through the diversion channels 222 on the support base 12.

[0035] A sealing cover 11 is located at the bottom of the device, with a supporting base 12 fixed at its upper center. An annular protective cover 231231 is fixedly installed in the central area of ​​the bottom of the sealing cover 11. The diameter of the sealing cover 11 is slightly larger than the outer diameter of the main pump inlet and outlet flanges, and a rubber sealing gasket with the same diameter as the sealing cover 11 is adhered to its bottom surface. The rubber sealing gasket has excellent elasticity and can fill the tiny gaps between the sealing cover 11 and the flange surface when the sealing cover 11 is closed, forming a second reliable sealing barrier and effectively preventing foreign objects from seeping in from the edge of the cover.

[0036] refer to Figure 4-5The locking components 32 are provided in four sets, evenly arranged on the upper surface of the sealing cover plate 11 around the support base 12. Each set of locking components 32 includes: a clamping plate 326 for final pressing and fixing to the upper surface of the flange; a movable support rod 323 with a transversely penetrating groove 324 inside its upper end face; the clamping plate 326 is rotatably connected to the groove 324 by a pin 325; the clamping plate 326 can be folded up or unscrewed in the groove 324 to achieve a vertical working state; the upper end of the screw rod 321 is fixedly connected to the movable support rod 323; the lower end of the fixed support rod 31 is fixed to the sealing cover plate 11, and its interior has a screw hole that mates with the screw rod 321; and a plastic sleeve 327 is fitted onto the fixed support rod 31 and the movable support rod 323 near the bottom, i.e., through the flange mounting hole.

[0037] In use, the movable support rod 323 can drive the screw rod 321 to rotate and rise within the screw hole of the fixed support rod 31. The clamping plate 326 can rotate 0-90° around the pin shaft 325 within the clamping groove 324 of the movable support rod 323. When vertically unfolded, it is in a locked state; when horizontally embedded within the clamping groove 324, it is in a disassembled / stored state.

[0038] The inflation component 22 includes an inflation connector 223, which is fixedly installed on the bottom surface of the sealing cover 11, inside the protective cover 231, and directly connected to the inflation channel 221 at the center of the support base 12 through an internal hole. The inflation connector 223 is a standard interface, facilitating connection to an external air source. The exhaust channel 224 is independently located on the right side of the inflation channel 221. The exhaust valve 225 is installed at the bottom of the sealing cover 11, inside the protective cover 231, and connected to the exhaust channel 224 on the side opposite to the inflation connector 223. The exhaust valve 225 is a manually operated rotary ball valve, which is convenient and reliable to operate.

[0039] The protective cover 231 is a ring-shaped structure, fixed to the center of the bottom surface of the sealing cover plate 11, surrounding and protecting the inflation connector 223 and the exhaust valve 225 located below it. The protective cover 232 is detachably connected to the lower end of the protective cover 231. After the device is installed and inflation is completed, the protective cover 232 is put on, completely sealing the inflation connector 223 and the exhaust valve 225 inside the protective cover 231, effectively preventing damage or misoperation of the valves due to collisions, stepping, falling objects, or dirt adhesion during construction. The handles 233 are symmetrically arranged on the upper surface of the sealing cover plate 11 on the left and right sides of the protective cover 231. They are U-shaped metal handles 233, which facilitate safe and stable handling, installation, and disassembly of the entire device by operators.

[0040] Specifically, the operator holds the handles 233 on both sides of the sealing cover plate 11 with both hands, lifts the device, aligns it with the inlet and outlet of the main pump, and carefully inserts the support base 12 along with the sealing airbag 21 on it into the inlet and outlet. At the same time, adjust the angle of the device so that the locking plate 326 is retracted into the slot 324 and in a horizontal position, so that the movable support rods 323 of all locking parts 32 are aligned and pass through the reserved mounting holes on the inlet and outlet flanges. Then lower the device so that the rubber sealing gasket at the bottom of the sealing cover plate 11 fits against the flange surface.

[0041] Operate each locking component 32 one by one: First, manually rotate the clamping plate 326 90° around the pin 325 until it is perpendicular to the movable support rod 323. Then, rotate the clamping plate 326 clockwise to rotate the movable support rod 323. At this time, the screw 321 is screwed downward into the screw hole of the fixed support rod 31, and the movable support rod 323 moves downward accordingly until the clamping plate 326 is pressed against the upper surface of the flange. All locking components 32 must reach the required tightness.

[0042] Specifically, remove the protective cover 232 to expose the inflation connector 223 and exhaust valve 225 inside the protective cover 231. Ensure that the exhaust valve 225 is closed. Connect an external air source to the inflation connector 223 and slowly input compressed air into the inflation connector 223. The gas enters the inner cavity of the sealing airbag 21 through the inflation channel 221 and the diversion channel 222. The sealing airbag 21 begins to expand circumferentially under the filling of gas. The anti-slip texture 226 on its outer surface tightly compresses and embeds into the inner wall surface of the inlet and outlet, forming a reliable radial sealing band. At the same time, the radial expansion force generated by the expansion of the airbag causes a huge static friction force between it and the metal inner wall of the inlet and outlet, providing axial and circumferential constraint forces, enabling the device to achieve a stable "self-locking" fixing effect. When the set inflation pressure is reached, disconnect the air source and replace the protective cover 232.

[0043] At this time, the triple protection of the device takes effect. The inflated sealing airbag 21 blocks the inner wall of the inlet and outlet, the sealing cover plate 11 and the rubber sealing gasket press against the upper surface of the flange to form an annular seal, and the locking part 32 mechanically presses and fixes the device on the flange.

[0044] During disassembly, remove the protective cover 232 and slowly open the exhaust valve 225. Gas is discharged from the sealing airbag 21 through the exhaust channel 224. The pressure inside the airbag gradually decreases, the airbag contracts circumferentially, and the friction between it and the inner wall of the inlet and outlet is eliminated, releasing the seal. Operate the locking parts 32 one by one: rotate the locking plate 326 counterclockwise to drive the movable support rod 323 to rotate. At this time, the screw 321 is screwed upward in the screw hole of the fixed support rod 31, the movable support rod 323 moves upward, and the locking plate 326 is lifted away from the flange surface. After rotating to the correct position, manually rotate the locking plate 326 90° and retract it into the slot 324 of the movable support rod 323.

[0045] After all locking parts 32 are unlocked and the airbag is fully contracted, hold the handle 233 with both hands and steadily lift the entire device vertically upwards to remove it from the inlet and outlet.

[0046] It eliminates the tedious steps of tightening / loosening bolts, requires no large or specialized tools, reduces the risk of personnel staying in high-radiation areas and labor costs, features a double-layer sealing design and controllable and adjustable inflation pressure, can adapt to different dimensional tolerances and slight surface unevenness, ensures a reliable seal without dead angles, effectively prevents foreign object intrusion, and the inflatable airbag provides a strong "self-locking" radial fixation effect through friction, combined with the mechanical clamping of the top locking part 32, the device has strong resistance to displacement and vibration, and can remain stable even in the presence of slight pipeline or environmental vibration.

[0047] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (variations in installation arrangement, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the elements may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of this utility model. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0048] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments may be omitted.

[0049] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An adaptive inflation sealing mechanism, characterized in that: include, The installation unit (1) includes a sealing cover plate (11) and a support base (12) vertically fixed at the center of the upper surface of the sealing cover plate (11); The inflation unit (2) includes a sealed airbag (21) that is annularly sleeved on the outer circumferential surface of the support base (12) and an inflation component (22) that is opened inside the support base (12).

2. The adaptive inflation sealing mechanism as described in claim 1, characterized in that: The inflatable component (22) includes an inflation channel (221), a diversion channel (222) disposed between the inflation channel (221) and the sealing airbag (21), and an inflation connector (223) disposed at the bottom of the sealing cover plate (11).

3. The adaptive inflation sealing mechanism as described in claim 2, characterized in that: An exhaust channel (224) is provided in parallel on the inflation channel (221), and an exhaust valve (225) is provided at the bottom of the sealing cover (11) and connected to the exhaust channel (224).

4. The adaptive inflation sealing mechanism as described in claim 3, characterized in that: The surface of the sealing airbag (21) is provided with anti-slip texture (226), and its annular inner diameter matches the outer diameter of the support base (12).

5. The adaptive inflation sealing mechanism as described in claim 4, characterized in that: It also includes a protective component (23), which includes a protective cover (231) fixed to the bottom surface of the sealing cover plate (11) and a protective cover (232) disposed at the bottom of the protective cover; The inflation connector (223) and the exhaust valve (225) are both located inside the protective cover (231).

6. The adaptive inflation sealing mechanism as described in claim 5, characterized in that: Handles (233) are symmetrically arranged on both sides of the protective cover (231).

7. A quick-lock anti-loosening device, comprising the adaptive inflation sealing mechanism as described in any one of claims 1 to 6, characterized in that: The connecting unit (3) includes a fixed support rod (31), the lower end of which is fixed on the sealing cover plate (11), and a locking member (32) provided on the fixed support rod (31).

8. The quick-lock anti-loosening device as described in claim 7, characterized in that: The locking component (32) includes a screw (321), a threaded hole (322) opened on the fixed support rod (31), the screw (321) being threadedly connected in the threaded hole (322), a movable support rod (323) fixedly installed at the upper end of the screw (321), the movable support rod (323) having the same diameter as the fixed support rod (31), a slot (324) opened laterally through the upper end face of the movable support rod (323), a pin (325) set in the slot (324), and a locking plate (326) rotatably connected to the movable support rod (323) through the pin (325) and adapted to be locked in the slot (324).

9. The quick-lock anti-loosening device as described in claim 8, characterized in that: Both the fixed support rod (31) and the movable support rod (323) are fitted with plastic sleeves (327) at their bottoms.

10. The quick-lock anti-loosening device as described in claim 9, characterized in that: The locking plate (326) can rotate 0-90° around the pin (325), and its locking contact surface has a serrated structure.

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