Auxiliary maintenance device for pneumatic butterfly valve

Abstract

The utility model belongs to the technical field of maintenance equipment, and discloses a pneumatic butterfly valve auxiliary maintenance device which comprises a rack, a sliding assembly, a supporting assembly and a lifting assembly, and the rack is provided with two parallel guide rails; the sliding assembly can support the executing mechanism and is in sliding fit with the two guide rails through the roller sets. The supporting assembly is provided with a first through groove matched with the valve body in a clamped mode and a second through groove allowing the valve rod to penetrate through, and the supporting assembly can abut against the bottom face of the connecting part. The lifting assembly is detachably connected with the guide rail and can drive the supporting assembly and the sliding assembly to synchronously move in the vertical direction. By arranging the sliding assembly and the supporting assembly, the sliding assembly and the supporting assembly are easy to operate, the pneumatic butterfly valve can be integrally disassembled and moved on the premise that the executing mechanism and the valve body are not disassembled, the overhauling time is shortened, the overhauling efficiency is improved, and the assembling precision of the pneumatic butterfly valve before and after overhauling can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance equipment, in particular to an auxiliary maintenance device for a pneumatic butterfly valve. Background Art

[0002] In the containment air filtration system within a nuclear power plant, a pneumatic butterfly valve is required as the containment pressure boundary to ensure the integrity of the containment pressure boundary during an accident. Most of these pneumatic butterfly valves are large, three-eccentric air valves. Due to the particularity of the system in which they are located, dust easily accumulates on the sealing surface of these valves. This can lead to a poor seal, affecting the integrity of the containment pressure boundary and potentially causing serious consequences. Therefore, any internal leakage of the valve requires efficient and rapid maintenance. However, these pneumatic butterfly valves weigh approximately one ton, and the actuator is approximately two meters long. Conventional lifting scaffolding within a nuclear power plant is not suitable for lifting and hoisting these pneumatic butterfly valves. The existing lifting method involves separating the actuator and valve body and lifting them separately. This means that when the sealing surface is subsequently repaired, the two must be reassembled to control the opening and closing of the valve. Once the internal leakage problem is resolved, the two must be separated again to first reinstall the valve body onto the pipeline and then reinstall the actuator onto the valve body. This is not only time-consuming and labor-intensive, affecting work efficiency, but the final reinstallation of the two parts may also cause slight deviations in the position of the actuator, resulting in failure to fully close the valve, causing internal leakage again, and requiring re-disassembly and lifting inspection. In addition, because the length of the actuator exceeds the maximum span of the scaffolding, the actuator needs to undergo complex spatial position adjustments during the lifting process, which greatly increases the lifting risk. Utility Model Content

[0003] The purpose of the utility model is to provide a pneumatic butterfly valve auxiliary maintenance device with simple operation and high maintenance efficiency.

[0004] To achieve this purpose, the present invention adopts the following technical solutions: a pneumatic butterfly valve auxiliary maintenance device, the pneumatic butterfly valve includes an actuator and a valve body located below the actuator, the actuator is connected to the valve body through a connecting part, and the valve body is also provided with a valve stem penetrating the connecting part, the pneumatic butterfly valve auxiliary maintenance device includes a frame, a sliding assembly, a support assembly and a lifting assembly, the frame is provided with two parallel guide rails; the sliding assembly can support the actuator and slide with the two guide rails through a roller group; the support assembly is provided with a first through groove that is snap-fitted with the valve body and a second through groove for the valve stem to pass through, the support assembly can abut against the bottom surface of the connecting part; the lifting assembly is detachably connected to the guide rail, and the lifting assembly can drive the support assembly and the sliding assembly to move synchronously in the vertical direction.

[0005] Preferably, the support assembly includes two top plates and two connecting plates, the top plates are located below the connecting plates, the two top plates are spaced apart along the guide rail direction, the same end of the two top plates is respectively connected to the same connecting plate, the first through grooves are respectively provided on the opposite sides of the two top plates, and the second through grooves are formed between the two top plates and the two connecting plates.

[0006] Preferably, the lifting assembly includes two first driving members and two first positioning members, the first driving members overlap with the guide rails and can drive the top plate to move, the first positioning members are detachably connected to the guide rails, and the first positioning members are used to position the first driving members.

[0007] Preferably, the first positioning member includes two positioning plates and two pushing members, the two positioning plates are symmetrically arranged on both sides of the first driving member, the pushing members are correspondingly connected to the positioning plates and are detachably connected to the guide rails, and the pushing members are used to drive the positioning plates to move toward or away from the first driving member.

[0008] Preferably, the sliding assembly includes two supporting plates that match the shape of the actuator, and the two supporting plates are arranged on both sides of the support assembly along the guide rail direction, and the roller group is provided at the bottom of each supporting plate.

[0009] Preferably, in the direction of the guide rail, the length of one of the pallets is greater than that of the other pallet, and the lifting assembly includes a second driving member and a second positioning member, the two ends of the second positioning member are respectively detachably connected to the two guide rails, and the second driving member is installed on the second positioning member and is located below the pallet with the longer length.

[0010] Preferably, the second positioning member includes a support, a clamp and a hoop, the two ends of the support are detachably connected to the two guide rails respectively, the clamp is fixed to the support, and the clamp is bolted to the clamp to position the second driving member.

[0011] Preferably, the pneumatic butterfly valve auxiliary maintenance device further comprises a limit assembly, which is detachably connected to the guide rail and is suitable for limiting the sliding assembly along the guide rail direction.

[0012] Preferably, the limit assembly includes four limit blocks, two of which are arranged opposite to each other and are detachably connected to the same guide rail, and the other two are arranged opposite to each other and are detachably connected to the other guide rail, and the roller group is limited between two opposite groups of limit blocks on the two guide rails.

[0013] Preferably, the guide rail is provided with a detachable baffle, and the baffle is symmetrically arranged on both sides of the roller in the roller group.

[0014] The beneficial effects of the present invention are as follows: when the user inspects the pneumatic butterfly valve, he can first place the frame and guide rails under the actuator of the pneumatic butterfly valve, then slide the sliding assembly so that the sliding assembly supports the actuator, then attach the support assembly to the bottom wall of the actuator and install the lifting assembly on the guide rails. The user then separates the pneumatic butterfly valve and the pipeline, starts the lifting assembly so that the support assembly and the sliding assembly lift the actuator, making it convenient for the user to remove the gasket and other seals between the valve body and the pipeline, so that a sufficiently large movable gap is generated between the valve body and the pipeline, and at the same time, the lifting assembly is reset so that the sliding assembly and the actuator fall back onto the guide rails, then the lifting assembly and the support assembly are removed, and the sliding assembly is pulled to move the pneumatic butterfly valve away from the pipeline, making it convenient for the user to inspect and maintain. By setting the sliding assembly and the support assembly, the sliding assembly and the support assembly are simple to operate, and the pneumatic butterfly valve can be disassembled and moved as a whole without disassembling the actuator and the valve body, thereby shortening the inspection time, improving the inspection efficiency, and ensuring the assembly accuracy of the pneumatic butterfly valve before and after inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the pneumatic butterfly valve of the utility model;

[0016] Figure 2 This is a schematic diagram of the use of the pneumatic butterfly valve auxiliary maintenance device of the utility model;

[0017] Figure 3 It is a structural diagram of the support assembly of the utility model;

[0018] Figure 4 It is a structural diagram of the first driving member and the first positioning member of the utility model;

[0019] Figure 5 This is a schematic structural diagram of the second driving member and the second positioning member of the present invention;

[0020] Figure 6 yes Figure 2 Enlarged view of point A in the middle.

[0021] In the picture:

[0022] 100, rack; 110, guide rail; 111, limit slot; 112, baffle; 120, tripod;

[0023] 200, sliding assembly; 210, roller assembly; 220, support plate;

[0024] 300, support assembly; 310, top plate; 311, first through slot; 320, connecting plate; 321, second through slot;

[0025] 400, lifting assembly; 410, first driving member; 420, first positioning member; 421, positioning plate; 422, pushing member; 430, second driving member; 440, second positioning member; 441, support; 442, snap ring; 443, clamp;

[0026] 500, limit assembly; 510, limit block;

[0027] 600 , pneumatic butterfly valve; 610 , actuator; 611 , connecting portion; 612 , first end; 613 , second end; 620 , valve body; 621 , valve stem. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0029] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0032] Reference Figures 1 to 6 As shown, according to an embodiment of the present application, a pneumatic butterfly valve auxiliary maintenance device is provided. The pneumatic butterfly valve 600 to be repaired includes an actuator 610 and a valve body 620 located below the actuator 610. The actuator 610 is connected to the valve body 620 through a connecting portion 611. The valve body 620 is also provided with a valve stem 621 that penetrates the connecting portion 611. 621 In this application, no specific distinction is made between the pneumatic butterfly valve 600 and the three-eccentric butterfly valve. The pneumatic butterfly valve 600 described below is the three-eccentric butterfly valve, and the three-eccentric butterfly valve is the pneumatic butterfly valve 600. This is specially explained here to avoid misunderstanding. In addition, since the pneumatic butterfly valve 600 technology is mature, there are a large number of existing technologies for related structures for reference. The structure of the pneumatic butterfly valve 600 will not be described in detail here.

[0033] The pneumatic butterfly valve auxiliary maintenance device includes a frame 100, a sliding assembly 200, a support assembly 300 and a lifting assembly 400. The frame 100 is made of high-strength alloy parts. The frame 100 includes a tripod. The top of the tripod is provided with two detachable parallel guide rails 110. The triangular legs have a variety of height sizes to accommodate pneumatic butterfly valves 600 with different installation heights.

[0034] The sliding assembly 200 is overlapped on the guide rail 110, and a roller group 210 is provided at the bottom end of the sliding assembly 200. The sliding assembly 200 can support the actuator 610 and slide with the two guide rails 110 through the roller group 210; the support assembly 300 is provided with a first through groove 311 that is snap-fitted with the valve body 620 and a second through groove 321 for the valve stem 621 to pass through. Specifically, the connection between the valve body 620 and the connecting part 611 is usually provided with two symmetrically arranged yoke structures. The first through groove 311 matches the shape of the yoke structure, and the second through groove 321 is arranged at the center of the support assembly 300. The support assembly 300 can abut against the bottom surface of the connecting part 611.

[0035] The lifting assembly 400 is detachably connected to the guide rail 110. The lifting assembly 400 can drive the support assembly 300 and the sliding assembly 200 to move synchronously in the vertical direction. When the sliding assembly 200 supports the actuator 610 and the support assembly 300 abuts against the bottom surface of the actuator 610, the lifting assembly 400 can drive the actuator 610 (or the pneumatic butterfly valve 600) to move up and down in the vertical direction through the support assembly 300 and the sliding assembly 200.

[0036] It is understandable that when users repair the pneumatic butterfly valve 600, the specific steps can be divided into the following steps:

[0037] The first step is to remove the handwheel of the pneumatic butterfly valve 600, select appropriate triangular legs according to the installation height of the actuator 610, fix two guide rails 110 to the triangular legs to form a complete frame 100, and then place the frame 100 under the actuator 610, ensuring that there is a gap between the guide rails 110 and the actuator 610 to allow the subsequent installation and movement of the sliding assembly 200, the support assembly 300, and the lifting assembly 400;

[0038] The second step is to place the sliding assembly 200 on the guide rail 110 and move it below the actuator 610 so that the sliding assembly 200 supports the actuator 610;

[0039] Step 3: Insert the first through slot 311 of the support assembly 300 into the yoke structure of the actuator 610 and make the support assembly 300 close to the bottom wall of the actuator 610;

[0040] Step 4: Install the lifting assembly 400 onto the guide rail 110 and align the lifting assembly 400 with the sliding assembly 200 and the supporting assembly 300;

[0041] Step 5: Unfasten the fasteners between the pneumatic butterfly valve 600 and the pipeline, separate the pneumatic butterfly valve 600 and the pipeline, and then activate the lifting assembly 400 to drive the support assembly 300 and the sliding assembly 200 to lift the actuator 610, so that the entire pneumatic butterfly valve 600 is slightly lifted;

[0042] Step 6: Remove the gasket and other seals between the valve body 620 and the pipe to create a sufficiently large clearance between the valve body 620 and the pipe. Simultaneously, control the lifting assembly 400 to reset, causing the sliding assembly 200 and the actuator 610 to return to the guide rail 110.

[0043] Step 7: Remove the lifting assembly 400 and the supporting assembly 300, leaving only the sliding assembly 200 on the guide rail 110. Pull the sliding assembly 200 to remove the pneumatic butterfly valve 600 from the pipeline for inspection and maintenance.

[0044] Step 8: After the inspection is completed, pull the sliding assembly 200 to pull the valve back to its original position for reinstallation.

[0045] By setting the sliding assembly 200 and the support assembly 300, the sliding assembly 200 and the support assembly 300 are easy to operate. The mobile pneumatic butterfly valve 600 can be disassembled as a whole without disassembling the actuator 610 and the valve body 620, and there is no need to adjust the spatial position of the actuator 610, which greatly shortens the maintenance time, improves the maintenance efficiency, and ensures the assembly accuracy of the pneumatic butterfly valve 600 before and after maintenance.

[0046] It should be noted that, under the premise that the lifting assembly 400 is aligned with the sliding assembly 200 and the support assembly 300, the order of the steps from the second step to the fourth step can be changed at will. For example, the fourth step of installing the lifting assembly 400 is performed first, and then the second and third steps of installing the sliding assembly 200 and the support assembly 300 are performed in sequence. This has no effect on the subsequent loading and unloading movement of the pneumatic butterfly valve 600 and will not be repeated here.

[0047] Furthermore, the sliding assembly 200 includes two support plates 220 that match the outer shape of the actuator 610. The two support plates 220 are arranged on both sides of the support assembly 300 along the guide rail 110, and a roller assembly 210 is provided at the bottom of each support plate 220. For example, if the actuator 610 of a triple-eccentric butterfly valve is cylindrical with two different outer diameters on either side of the connecting portion 611, the two support plates 220 are respectively configured as arc plates that match the outer shape of the two cylindrical actuators 610. If the actuator 610 of a triple-eccentric butterfly valve is symmetrically cubic on either side of the connecting portion 611, the two support plates 220 are configured as two identical channel-shaped steel plates.

[0048] Setting the sliding assembly 200 to two support plates 220 can effectively simplify the structure of the sliding assembly 200 and facilitate the design and manufacture of the sliding assembly 200. The support plates 220 match the appearance of the actuator 610, which can effectively improve the connection stability between the sliding assembly 200 and the actuator 610.

[0049] The roller assembly 210 comprises a plurality of rollers arranged in a matrix at the bottom of the support plate 220. Alternatively, the rollers can be conventional rollers, reducing the cost of installing the sliding assembly 200. Alternatively, the rollers can be motor-driven automatic rollers. The support plate 220 is equipped with a controller connected to the motor. Users can remotely control the roller rotation through an external control system and controller, eliminating the labor required to manually pull the sliding assembly 200.

[0050] Optionally, a sunken limiting groove 111 is provided on the top surface of the guide rail 110 , and the rollers in the roller assembly 210 are limited in the limiting groove 111 , thereby improving the movement stability of the roller assembly 210 .

[0051] Reference Figure 2 and Figure 3As shown, it can be understood that the support assembly 300 includes two top plates 310 and two connecting plates 320. The top plates 310 and the connecting plates 320 are both semicircular plates that match the shape of the connecting portion 611. The top plates 310 are located below the connecting plates 320. The two top plates 310 are spaced apart and symmetrically arranged along the guide rail 110. The same end of the two top plates 310 is connected to the same connecting plate 320. The two opposite sides of the two top plates 310 are respectively provided with a first through groove 311, and the spacing between the two connecting plates 320 is greater than or equal to the width of the first through groove 311. A second through groove 321 is formed between the two top plates 310 and the two connecting plates 320. That is, the overlapping portion of the gap between the two top plates 310 and the gap between the two connecting plates 320 forms the second through groove 321.

[0052] By providing a split top plate 310 and two connecting plates 320, on the one hand, the structure of the support assembly 300 can be simplified, which makes it easier for users to load and unload the support assembly 300 and improves the convenience of loading and unloading the support assembly 300; on the other hand, the two top plates 310 and the two connecting plates 320 are arranged to form a second through groove 321, which can greatly increase the contact area between the support assembly 300 and the connecting part 611 and the contact area between the support assembly 300 and the lifting assembly 400, ensuring that the stress of the lifting assembly 400 can be stably transmitted to the connecting part 611, thereby preventing the lifting assembly 400 or the pneumatic butterfly valve 600 from crushing or damaging the support assembly 300.

[0053] In some embodiments, the top plate 310 and the connecting plate 320 may also be provided as an integrally formed part, thereby further simplifying the structure of the support assembly 300 and effectively improving the structural strength of the support assembly 300 .

[0054] Reference Figure 2 and Figure 4 As shown, it can be understood that the lifting assembly 400 includes two first driving members 410 and two first positioning members 420. Optionally, the first driving member 410 can be a linear moving structure with simple structure and stable control, such as a cylinder, an electric cylinder, an electric push rod, a screw slide, etc., which will not be described in detail here. The first driving member 410 overlaps with the guide rail 110 and can drive the top plate 310 to move. The first positioning member 420 is detachably connected to the guide rail 110, and the first positioning member 420 is used to position the first driving member 410. Specifically, the first positioning member 420 (and the second positioning member 440 described later) can be detachably connected to the guide rail 110 by screwing, pinning, clamping, etc., which will not be described in detail here.

[0055] By providing the first driving member 410 and the first positioning member 420 , the user can position and lock the first driving member 410 on the guide rail 110 through the first positioning member 420 , thereby improving the installation stability of the first driving member 410 .

[0056] It should be noted that the bottom surface of the connecting plate 320 and the movable end of the first driving member 410 are provided with mutually mating connection structures to ensure the stability of the connection between the first driving member 410 and the support assembly 300. For example, when the first driving member 410 is configured as a cylinder, the bottom end of the connecting plate 320 is provided with a socket that is plugged into the cylinder's push rod. The cylinder's push rod can be inserted into the socket to lift the support assembly 300.

[0057] Furthermore, the first positioning member 420 includes two positioning plates 421 and two pushing members 422, which match the sidewall shape of the first driving member 410. For example, if the first driving member 410 is a cylinder with flat sides, the positioning plates 421 are flat plates parallel to the cylinder sidewalls; if the first driving member 410 is a cylindrical cylinder, the positioning plates 421 are arc-shaped plates that match the cylinder shape.

[0058] Two positioning plates 421 are symmetrically arranged on both sides of the first driving member 410. The propulsion member 422 is connected to the positioning plates 421 and is detachably connected to the guide rail 110. The propulsion member 422 is used to drive the positioning plates 421 to move toward or away from the first driving member 410. Optionally, the propulsion member 422 can be configured as an automatic micro-cylinder, a push rod, or a manual screw push rod structure, which will not be described in detail here.

[0059] The first positioning member 420 is set to a positioning plate 421 and a pushing member 422. While simplifying the structure of the first positioning member 420 and facilitating the loading and unloading of the first positioning member 420, the user can adjust the relative positions of the two positioning plates 421 to thereby adjust the horizontal position of the first driving member 410 on the guide rail 110, thereby improving the adjustment accuracy of the first positioning member 420 and facilitating the user to align the connection structure between the first driving member 410 and the connecting plate 320.

[0060] Reference Figure 2 and Figure 5 As shown, it can be understood that there is usually a length difference between the actuators 610 on both sides of the connecting portion 611 of the triple-eccentric butterfly valve, that is, the first end 612 of the actuator 610 connected to the handwheel on one side of the connecting portion 611 (in this embodiment, the part of the actuator 610 connected to the handwheel is defined as the first end 612 of the actuator 610, and the other end is the second end 613. The first end 612 and the second end 613 are respectively located on both sides of the connecting portion 611, which is specially explained here and will not be repeated hereafter), and its length dimension is greater than the length dimension of the second end 613 on the other side of the connecting portion 611. Correspondingly, the weight of the first end 612 is also greater than the weight of the second end 613. This will result in the length of the support plate 220 located below the first end 612 being greater than the length of the other support plate 220 in the direction of the guide rail 110.

[0061] The lifting assembly 400 includes a second driving member 430 and a second positioning member 440. The second positioning member 440 is arranged across the two guide rails 110. The two ends of the second positioning member 440 are detachably connected to the two guide rails 110 and are located in the gap between the roller assembly 210. The second driving member 430 is mounted on the second positioning member 440 and is located below the longer support plate 220. Optionally, the second driving member 430 can be a simple, stable linear motion structure such as a pneumatic cylinder, an electric cylinder, an electric push rod, or a screw slide. A mutually cooperating connection structure is also provided between the second driving member 430 and the support plate 220. For details, please refer to the description of the jack above and will not be repeated here.

[0062] The second drive member 430 and the second positioning member 440 are arranged to span the two guide rails 110, so that the second drive member 430 is located between the two guide rails 110. This prevents interference between the second drive member 430 and the roller assembly 210 between the support plate 220 and the guide rails 110, effectively improving the structural rationality of the lifting assembly 400. The second drive member 430 is located below the longer support plate 220, ensuring that the second drive member 430 lifts the heavier end of the actuator 610. The positions of the first drive member 410 and the second drive member 430 are specially designed so that the center of gravity of the pneumatic butterfly valve 600 falls at the center of the planar area enclosed by the two first drive members 410 and the second drive member 430. This prevents the lifting assembly 400 from becoming unbalanced during the lifting of the pneumatic butterfly valve 600, effectively improving the operating stability of the auxiliary maintenance device.

[0063] Furthermore, the second positioning member 440 includes a support 441, a retaining ring 442 and a clamp 443. The two ends of the support 441 are detachably connected to the two guide rails 110 respectively, the retaining ring 442 is fixed to the support 441, and the clamp 443 is bolted to the retaining ring 442 to position and lock the second driving member 430.

[0064] By providing the retaining ring 442 and the clamp 443 , the structure of the second positioning member 440 can be simplified, the cost of the second positioning member 440 can be reduced, and the installation stability of the second driving member 430 can be effectively improved.

[0065] Reference Figure 2 and Figure 6 As shown, it is understood that the pneumatic butterfly valve auxiliary maintenance device further includes a limit assembly 500, which is detachably connected to the guide rail 110 and is suitable for limiting the sliding assembly 200 along the guide rail 110. Optionally, the limit assembly 500 can be a limit pin, spring column, etc. installed on the guide rail 110, which will not be described in detail here.

[0066] By setting the limit component 500, after the user completes the installation of the sliding component 200 in the second step and when inspecting the valve body 620 in the seventh step, the limit component 500 limits the movement of the sliding component 200, thereby preventing the sliding component 200 from slipping when the user disassembles the pneumatic butterfly valve 600 or inspects the valve body 620, thereby affecting user use.

[0067] Furthermore, the limiting assembly 500 includes four limiting blocks 510, which can be limited in the limiting grooves 111 and are bolted to the guide rail 110. Two limiting blocks 510 are arranged opposite each other and are detachably connected to the same guide rail 110, and the other two limiting blocks 510 are arranged opposite each other and are detachably connected to the other guide rail 110. The roller assembly 210 is limited between two sets of opposite limiting blocks 510 on the two guide rails 110. That is, the roller on one side of the roller assembly 210 is located between two opposite limiting blocks 510 on the same guide rail 110, and the two limiting blocks 510 respectively abut the two rollers at both ends of the roller assembly 210 on the same guide rail 110.

[0068] The limit assembly 500 is set to four limit blocks 510. While simplifying the structure of the limit assembly 500, every two opposing limit blocks 510 can lock multiple rollers on the same guide rail 110, greatly improving the locking force of the limit assembly 500 and ensuring the structural stability of the sliding assembly 200.

[0069] Furthermore, the guide rail 110 is provided with a detachable baffle 112 , and the baffle 112 is symmetrically arranged on both sides of the rollers in the roller assembly 210 .

[0070] By setting the baffle 112, on the one hand, the baffle 112 can limit the sliding assembly 200 in a direction perpendicular to the guide rail 110, further improving the movement stability of the sliding assembly 200; on the other hand, when the lifting assembly 400 drives the sliding assembly 200 to rise, the baffle 112 can limit the sliding assembly 200 in the vertical direction, avoiding the sliding assembly 200 from tilting, and ensuring that the sliding assembly 200 will not deviate or shift before and after lifting and lowering, further improving the working stability of the auxiliary maintenance device.

[0071] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pneumatic butterfly valve auxiliary maintenance device, wherein the pneumatic butterfly valve (600) includes an actuator (610) and a valve body (620) located below the actuator (610), wherein the actuator (610) is connected to the valve body (620) via a connecting portion (611), and the valve body (620) is further provided with a valve stem (621) that penetrates the connecting portion (611), characterized in that: The pneumatic butterfly valve auxiliary maintenance device includes: The frame (100) is provided with two parallel guide rails (110); A sliding assembly (200) capable of supporting the actuator (610) and slidingly cooperating with the two guide rails (110) via a roller assembly (210); A support assembly (300) is provided with a first through groove (311) for engaging with the valve body (620) and a second through groove (321) for the valve stem (621) to pass through, and the support assembly (300) is capable of abutting against the bottom surface of the connecting portion (611); A lifting assembly (400) is detachably connected to the guide rail (110), and the lifting assembly (400) can drive the supporting assembly (300) and the sliding assembly (200) to move synchronously in a vertical direction.

2. The pneumatic butterfly valve auxiliary maintenance device according to claim 1 is characterized in that: The support assembly (300) comprises two top plates (310) and two connecting plates (320), wherein the top plates (310) are located below the connecting plates (320), and the two top plates (310) are spaced apart along the direction of the guide rail (110), and the same end of the two top plates (310) is respectively connected to the same connecting plate (320), and the first through grooves (311) are respectively provided on opposite sides of the two top plates (310), and the second through grooves (321) are formed between the two top plates (310) and the two connecting plates (320).

3. The pneumatic butterfly valve auxiliary maintenance device according to claim 2, characterized in that: The lifting assembly (400) includes two first driving members (410) and two first positioning members (420), wherein the first driving members (410) overlap with the guide rail (110) and can drive the top plate (310) to move, and the first positioning members (420) are detachably connected to the guide rail (110), and the first positioning members (420) are used to position the first driving members (410).

4. The pneumatic butterfly valve auxiliary maintenance device according to claim 3 is characterized in that: The first positioning member (420) includes two positioning plates (421) and two pushing members (422), wherein the two positioning plates (421) are symmetrically arranged on both sides of the first driving member (410), and the pushing members (422) are correspondingly connected to the positioning plates (421) and are detachably connected to the guide rail (110), and the pushing members (422) are used to drive the positioning plates (421) to move toward or away from the first driving member (410).

5. The pneumatic butterfly valve auxiliary maintenance device according to any one of claims 1 to 4, characterized in that: The sliding assembly (200) includes two supporting plates (220) whose shapes match those of the actuator (610). The two supporting plates (220) are respectively arranged on both sides of the support assembly (300) along the guide rail (110), and the bottom of each supporting plate (220) is provided with the roller assembly (210).

6. The pneumatic butterfly valve auxiliary maintenance device according to claim 5, characterized in that: In the direction of the guide rail (110), the length of one of the support plates (220) is greater than the length of the other support plate (220), and the lifting assembly (400) includes a second driving member (430) and a second positioning member (440), and the two ends of the second positioning member (440) are detachably connected to the two guide rails (110), and the second driving member (430) is installed on the second positioning member (440) and is located below the longer support plate (220).

7. The pneumatic butterfly valve auxiliary maintenance device according to claim 6, characterized in that: The second positioning member (440) includes a support (441), a clamping ring (442) and a clamping hoop (443); the two ends of the support (441) are detachably connected to the two guide rails (110), the clamping ring (442) is fixed to the support (441), and the clamping hoop (443) is bolted to the clamping ring (442) to position the second driving member (430).

8. The pneumatic butterfly valve auxiliary maintenance device according to any one of claims 1 to 4, characterized in that: The pneumatic butterfly valve auxiliary maintenance device further comprises a limiting assembly (500), wherein the limiting assembly (500) is detachably connected to the guide rail (110), and the limiting assembly (500) is suitable for limiting the sliding assembly (200) along the guide rail direction.

9. The pneumatic butterfly valve auxiliary maintenance device according to claim 8, characterized in that: The limiting assembly (500) comprises four limiting blocks (510), wherein two of the limiting blocks (510) are arranged opposite to each other and are detachably connected to the same guide rail (110), and the other two limiting blocks (510) are arranged opposite to each other and are detachably connected to another guide rail (110), and the roller group (210) is limited between two groups of two opposite limiting blocks (510) on the two guide rails (110).

10. The pneumatic butterfly valve auxiliary maintenance device according to any one of claims 1 to 4, characterized in that: The guide rail (110) is provided with a detachable baffle (112), and the baffle (112) is symmetrically arranged on both sides of the roller in the roller assembly (210).

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