Blue oil test device for swing check valve

Abstract

The utility model belongs to the technical field of valves, and discloses a swing check valve blue oil test device which is connected with a valve body, the valve body comprises a rocker arm, a valve clack and a valve body, the valve clack is connected with the rocker arm, the rocker arm is detachably connected with the valve body, and the swing check valve blue oil test device comprises a lifting assembly and a guide assembly. The lifting assembly comprises a lifting frame, an ejector rod and a lifting rotating shaft, the lifting frame and the ejector rod are detachably connected with the valve body, the ejector rod is rotationally arranged above the valve body, the lifting frame and the ejector rod are arranged on the two sides of the lifting rotating shaft respectively, and the lifting rotating shaft is selectively connected with the rocker arm so that the end, away from the valve clack, of the rocker arm can rotate around the center axis of the lifting rotating shaft. The guide assembly comprises a clamping sleeve, the clamping sleeve is in sliding connection with the valve body, and a positioning groove is formed in the clamping sleeve. Therefore, the lifting frame can stably support the rocker arm and the valve clack, and the rocker arm can stably turn over, so that the interference of maintainers and the valve body on a blue oil line is reduced, and the accuracy of a blue oil test is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a blue oil testing device for a swing check valve. Background Art

[0002] A valve is a device used to control the flow of fluid. Its main functions include opening or closing fluid channels, regulating fluid flow, changing fluid flow direction, and preventing fluid backflow.

[0003] The swing check valve is a commonly used valve, mainly used to prevent fluid backflow. The swing check valve consists of a valve body, a rocker arm and a valve disc. Under normal circumstances, when the valve disc is closed, the valve body should be in a sealed state. However, due to factors such as the valve disc being scratched or hit during the opening and closing process or the presence of foreign matter in the pipeline, the sealing surface may be damaged and cause internal leakage of the valve. After the maintenance personnel repair the sealing surface, they usually need to perform a blue oil test on the repaired check valve to re-evaluate the quality of the sealing surface to ensure that internal leakage will not occur again. After the sealing surface repair is completed, the rocker arm and valve disc need to be assembled first, and then placed in the maintenance area with the sealing surface facing up. Blue oil is evenly applied to the sealing surface to form a blue oil line. After application, the rocker arm and valve disc are reinstalled on the valve body and the valve disc is forced to fall towards the valve seat. The rocker arm and valve disc are removed to check the blue oil on the valve disc to determine the quality of the sealing surface.

[0004] However, during operation, the rocker arm and valve disc need to be moved to multiple locations. During the transportation and assembly process, it is difficult for maintenance personnel to control the movement and flipping of the rocker arm and valve disc, which makes the blue oil line very easy to be touched by mistake. After being assembled to the valve body, the blue oil line may also collide with the internal structure of the valve body, thereby affecting the blue oil test results. There is a problem that the blue oil line is easily interfered with during the movement and assembly of the rocker arm and valve disc, which makes the blue oil test less accurate. Utility Model Content

[0005] The purpose of the utility model is to provide a blue oil testing device for a swing check valve, so as to solve the problem that the blue oil line of a rocker arm and a valve disc is easily interfered with during the movement and assembly process.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The cam is connected to the valve body by a rocker arm, a valve disc and a valve body, the valve disc is connected to the rocker arm, and the rocker arm is detachably connected to the valve body. The blue oil testing device of the swing check valve comprises: a lifting assembly, the lifting assembly comprises a lifting frame, a push rod and a lifting shaft, the lifting frame and the push rod are both detachably connected to the valve body, the push rod is rotatably arranged above the valve body, the lifting frame and the push rod are respectively arranged on both sides of the lifting shaft, the lifting shaft and the rocker arm are selectively connected to the rocker arm so that the end of the rocker arm away from the valve disc rotates around the central axis of the lifting shaft; a guide assembly, the guide assembly comprises a ferrule, the ferrule is slidably connected to the valve body, and a positioning groove is provided on the ferrule for selectively clamping the rocker arm and the ferrule.

[0008] Preferably, the guide assembly further includes a guide rail, a guide shaft and a pull rod, the guide rail is arranged above the valve body, the guide shaft is connected to the guide rail and slides along the length direction of the guide rail, one end of the pull rod is connected to the guide shaft so that the pull rod rotates around the central axis of the guide shaft, and the other end is rotatably connected to the sleeve.

[0009] Preferably, the ferrule is connected to a card plate, and the guide assembly includes two groups of guide positioning plates arranged on the card plate, and the two groups of guide positioning plates are respectively arranged on both sides of the ferrule, and there are two pull rods, and the guide positioning plates are rotatably connected to the pull rods in a one-to-one correspondence.

[0010] Preferably, the guide assembly further comprises a slider, which is slidably arranged on the guide rail, the guide shaft is connected to the slider, and the end of the pull rod away from the ferrule is connected to a connecting tube, which is sleeved on the guide shaft.

[0011] Preferably, the guide assembly further comprises a guide base, the guide base is connected to the valve body flange, the guide rail is connected to a positioning frame, and the positioning frame is detachably arranged on the guide base.

[0012] Preferably, the lifting assembly further comprises a supporting plate, the supporting plate is connected to the valve body flange, and the lifting frame and the push rod are both arranged on the supporting plate.

[0013] Preferably, the support plate includes a mounting end and two fixed ends, the two fixed ends are respectively arranged at both ends of the mounting end, and the two fixed ends are respectively connected to the valve body flange.

[0014] Preferably, the lifting assembly further comprises a lifting positioning plate, the lifting positioning plate is arranged on the supporting plate, and the push rod is rotatably connected to the lifting positioning plate.

[0015] Preferably, the lifting assembly further comprises a support frame, the support frame is detachably connected to the valve body, and both ends of the lifting shaft are respectively connected to the support frame.

[0016] Preferably, the support frame is fixedly connected to a mounting frame, and the mounting frame is flange-connected to the valve body.

[0017] Beneficial effects of the utility model:

[0018] A blue oil test device for a swing check valve is connected to a valve body. The valve body includes a rocker arm, a valve disc and a valve body. The valve disc is connected to the rocker arm, and the rocker arm is detachably connected to the valve body. The blue oil test device for a swing check valve includes a lifting assembly and a guide assembly. The lifting assembly includes a lifting frame, a push rod and a lifting shaft. The lifting frame and the push rod are both detachably connected to the valve body. The push rod is rotatably arranged above the valve body. The lifting frame and the push rod are respectively arranged on both sides of the lifting shaft. The lifting shaft is selectively connected to the rocker arm so that the end of the rocker arm away from the valve disc rotates around the central axis of the lifting shaft; the guide assembly includes a clamping sleeve, which is slidably connected to the valve body. A positioning groove is provided on the clamping sleeve for selectively clamping the rocker arm and the clamping sleeve.

[0019] In this way, the rocker arm and valve disc are placed on the lifting frame, which makes it convenient for maintenance personnel to apply blue oil to the sealing surface. Under the fiber of the lifting shaft, the rocker arm can rotate stably until the push rod abuts the valve disc, avoiding the sealing surface of the valve disc from contacting other structures during the application of blue oil and flipping. The ferrule can facilitate maintenance personnel to move the rocker arm and valve disc after applying blue oil, avoiding the blue oil line from contacting the valve body or maintenance personnel during the movement and assembly of the valve disc and affecting the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of a valve body in one embodiment of the present utility model;

[0021] Figure 2 This is a structural diagram of a blue oil test device for a swing check valve in one embodiment of the present invention;

[0022] Figure 3 This is a partial structural diagram of a guide assembly in one embodiment of the present utility model;

[0023] Figure 4 In one embodiment of the present invention Figure 3 A magnified view of point A;

[0024] Figure 5 It is a structural schematic diagram of a lifting assembly in one embodiment of the present utility model.

[0025] In the picture:

[0026] 1. Valve body; 11. Rocker arm; 12. Valve body; 2. Lifting assembly; 21. Lifting frame; 22. Push rod; 23. Lifting shaft; 24. Support plate; 241. Mounting end; 242. Fixed end; 25. Lifting positioning plate; 251. Lifting positioning pin; 26. Support frame; 261. Mounting frame; 3. Guide assembly; 31. Clamping sleeve; 311. Positioning groove; 312. Clamping plate; 32. Guide rail; 321. Positioning frame; 33. Guide shaft; 34. Pull rod; 341. Connecting pipe; 35. Guide positioning plate; 351. Guide positioning pin; 36. Slider; 361. Limiting groove; 37. Guide base. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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 a specific orientation, 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.

[0031] See Figure 1 and Figure 2 The utility model provides a blue oil test device for a swing check valve. The blue oil test device for a swing check valve is connected to a valve body 1. The valve body 1 includes a rocker arm 11, a valve disc (not shown in the figure) and a valve body 12. The valve disc is connected to the rocker arm 11. The rocker arm 11 and the valve body 12 are detachably connected. The blue oil test device for a swing check valve includes a lifting assembly 2 and a guide assembly 3. The lifting assembly 2 includes a lifting frame 21, a push rod 22 and a lifting shaft 23. The lifting frame 21 and the push rod 22 They are all detachably connected to the valve body 12, and the push rod 22 is rotatably set above the valve body 12. The lifting frame 21 and the push rod 22 are respectively arranged on both sides of the lifting shaft 23. The lifting shaft 23 is selectively connected to the rocker arm 11 so that the end of the rocker arm 11 away from the valve disc rotates around the central axis of the lifting shaft 23; the guide assembly 3 includes a clamping sleeve 31, which is slidably connected to the valve body 12, and a positioning groove 311 is provided on the clamping sleeve 31 for selectively clamping the rocker arm 11 and the clamping sleeve 31.

[0032] In this embodiment, a valve seat (not shown in the figure) is provided inside the valve body 12, one end of the rocker arm 11 is connected to the valve disc, and the rocker arm 11 is connected to the valve body 12 through a pin shaft (not shown in the figure), and the lifting frame 21 is vertically arranged above the valve body 12. The length of the push rod 22 is less than the height of the lifting frame 21, and the push rod 22 is arranged above the cavity of the valve body 12. The lifting shaft 23 is horizontally arranged above the valve body 12, and the distance between the lifting shaft 23 and the valve body 12 is greater than the distance between the lifting frame 21 and the valve body 12; the ferrule 31 is arranged on the side of the push rod 22 away from the lifting frame 21.

[0033] It should be noted that the end of the rocker arm 11 facing away from the valve disc is passed through the lifting shaft 23, so that the rocker arm 11 can rotate around the central axis of the lifting shaft 23. After the rocker arm 11 and the valve disc are assembled to the lifting shaft 23, the rocker arm 11 can be overlapped on the lifting frame 21, and the sealing surface of the valve disc is set upward, which is convenient for maintenance personnel to apply blue oil. After the application is completed, the rocker arm 11 is rotated so that the push rod 22 supports the area of ​​the valve disc that is not coated with blue oil, which can facilitate maintenance personnel to adjust the position of the rocker arm 11 and the valve disc so that the rocker arm 11 and the valve disc can smoothly enter the interior of the valve body 12; the ferrule 31 is clamped with the end of the rocker arm 11 connected to the valve disc, and the connection between the rocker arm 11 and the lifting shaft 23 is released, which can make the rocker arm 11 and the valve disc fixed on the ferrule 31 move downward, thereby realizing the assembly of the rocker arm 11 and the valve body 12.

[0034] In this way, the lifting frame 21 can stably support the rocker arm 11 and the valve disc. Under the limitation of the lifting shaft 23, the rocker arm 11 can stably flip until the push rod 22 abuts against the valve disc, avoiding the sealing surface of the valve disc from contacting other structures during the process of applying blue oil and flipping. The ferrule 31 can facilitate maintenance personnel to assemble the rocker arm 11 to the inside of the valve body 12 and perform a blue oil test without contacting the rocker arm 11 and the valve disc, reducing the interference of maintenance personnel and the valve body 12 on the blue oil line and improving the accuracy of the blue oil test.

[0035] See Figure 2 and Figure 3 In some embodiments, the guide assembly 3 further includes a guide rail 32, a guide shaft 33 and a pull rod 34. The guide rail 32 is arranged above the valve body 12. The guide shaft 33 is connected to the guide rail 32 and slides along the length direction of the guide rail 32. One end of the pull rod 34 is connected to the guide shaft 33 so that the pull rod 34 rotates around the central axis of the guide shaft 33, and the other end is rotatably connected to the sleeve 31.

[0036] Among them, there are two guide rails 32, which are vertically arranged above the valve body 12, and the two ends of the guide shaft 33 are slidingly connected to the two guide rails 32 respectively. There are two pull rods 34, and the two pull rods 34 are detachably connected to the guide shaft 33; the length direction of the guide shaft 33 is parallel to the length direction of the lifting shaft 23.

[0037] It should be noted that the ferrule 31 is rotatably connected to the pull rod 34, which can facilitate the adjustment of the angle of the ferrule 31 so that the ferrule 31 is stably engaged with the rocker arm 11, and the guide shaft 33 is translated downward along the length direction of the guide rail 32, which can drive the pull rod 34 and the ferrule 31 to translate downward, and the rocker arm 11 and the valve disc are allowed to enter the valve body 12. After the rocker arm 11 is assembled to the valve body 12 through the pin shaft, the engagement between the ferrule 31 and the rocker arm 11 is released, and the valve disc can fall to the closed position and collide with the valve seat, thereby completing the blue oil test. The angle of the ferrule 31 and the pull rod 34 is adjusted so that the ferrule 31 is engaged with the rocker arm 11 again, so that the maintenance personnel can remove the rocker arm 11 and the valve disc from the valve body 12 by pulling the pull rod 34, and check the blue oil line.

[0038] In this way, the guide shaft 33 can drive the rocker arm 11 and the valve disc to stably enter the valve body 12 under the limitation of the guide rail 32, avoiding the blue oil line from being interfered with by the inner wall of the valve body 12 when the rocker arm 11 and the valve disc descend or rise, thereby improving the accuracy of the blue oil test.

[0039] See Figure 3 and Figure 4In some embodiments, the ferrule 31 is connected to a card plate 312, and the guide assembly 3 includes two sets of guide positioning disks 35 provided on the card plate 312. The two sets of guide positioning disks 35 are respectively provided on both sides of the ferrule 31. Two pull rods 34 are provided, and the guide positioning disks 35 are rotatably connected to the pull rods 34 in a one-to-one correspondence. In this embodiment, a guide positioning pin 351 is detachably connected to the guide positioning disk 35. The guide positioning disk 35 and the pull rod 34 are each provided with a plurality of holes (not shown in the figure) for inserting the guide positioning pin 351. When the guide positioning pin 351 is inserted into the guide positioning pin 351 and the pull rod 34, the angle between the card plate 312 and the pull rod 34 can be limited, so that the ferrule 31 is stably engaged with the rocker arm 11.

[0040] In this way, when the guide positioning pin 351 is not inserted into the guide positioning plate 35 and the pull rod 34, the angle of the ferrule 31 and the pull rod 34 can be freely changed to facilitate the adjustment of the angle of the ferrule 31 so that it is engaged with the rocker arm 11. After the ferrule 31 is stably engaged with the rocker arm 11, the guide positioning pin 351 is inserted into the guide positioning plate 35 and the pull rod 34, which can fix the relative position of the ferrule 31 and the pull rod 34, so that the ferrule 31 can stably support the rocker arm 11 and the valve disc when it is lowered, making it convenient for maintenance personnel to assemble the rocker arm 11 to the valve body 12, thereby improving the stability of the rocker arm 11 and the valve disc during movement and assembly, avoiding external interference with the blue oil line, and improving the accuracy of the blue oil test.

[0041] It is understandable that the guide positioning plate 35 can also be set on the clamping sleeve 31, and the position of the guide positioning plate 35 can be flexibly adjusted according to actual needs, which will not be listed in detail here.

[0042] See Figure 3 In some embodiments, the guide assembly 3 also includes a slider 36, which is slidably set on the guide rail 32, the guide shaft 33 is connected to the slider 36, and the end of the pull rod 34 away from the sleeve 31 is connected to the connecting tube 341, which is sleeved on the guide shaft 33.

[0043] In this embodiment, a slider 36 is correspondingly slidably connected to a guide rail 32, and a limiting groove 361 is provided on the side of the slider 36 facing away from the guide rail 32, so that both ends of the guide shaft 33 are clamped in the limiting groove 361, and the connecting tube 341 is rotatably connected to the guide shaft 33.

[0044] In this way, after the valve disc collides with the valve body 12, the maintenance personnel can remove the guide shaft 33 from the slider 36, so as to quickly engage the sleeve 31 with the rocker arm 11, pull the rocker arm 11 to rotate to the initial position before falling, and then assemble the two ends of the guide shaft 33 to the two sliders 36 respectively, release the connection between the rocker arm 11 and the valve body 12, pull the guide shaft 33 upward and move the rocker arm 11 and the valve body 12 out of the valve body 12, thereby improving the stability of the movement of the rocker arm 11 and the valve body 12, and avoiding the blue oil line from contacting the inner wall of the valve body 12, thereby improving the stability of the blue oil test.

[0045] It is understandable that the maintenance personnel can also manually rotate the rocker arm 11 to move the rocker arm 11 and the valve disc to the initial position before falling, and then engage the sleeve 31 with the rocker arm 11. The reset method of the rocker arm 11 and the valve disc can be flexibly adjusted according to actual needs. Since the movement of the guide shaft 33 is restricted by the guide rail 32, and when the rocker arm 11 is inside the valve body 12, the rotation of the rocker arm 11 is restricted by the pin shaft between the rocker arm 11 and the valve body 12, so that the movement trajectory of the rocker arm 11 and the valve disc is fixed.

[0046] See Figure 2 and Figure 3 In some embodiments, the guide assembly 3 further includes a guide base 37 , which is flange-connected to the valve body 12 , and the guide rail 32 is connected to a positioning frame 321 , which is detachably disposed on the guide base 37 .

[0047] Among them, the guide base 37 is provided with a hole (not shown in the figure) corresponding to the flange hole on the valve body 12, so as to facilitate the assembly of the guide base 37 to the valve body 12. The height direction of the guide base 37 is parallel to the height direction of the valve body 12. There are two positioning frames 321, and the two positioning frames 321 are fixedly connected to the two guide rails 32 respectively, and the positioning frames 321 are arranged on the side of the guide rail 32 away from the slider 36. The positioning frames 321 and the guide base 37 are detachably connected by bolts.

[0048] In this way, the guide base 37, the valve body 12 and the positioning frame 321 can be detachably connected, which makes it easy to install the guide rail 32 above the valve body 12, and can provide stable support for the guide rail 32 and the guide shaft 33, the pull rod 34, and the sleeve 31, so that the rocker arm 11 and the valve disc can move stably in the vertical direction, avoiding the valve disc position from shifting during the movement and causing the blue oil line to contact other structures, thereby improving the accuracy of the blue oil test.

[0049] It is understandable that the positioning frame 321 can also be fixedly set on the guide base 37, and the connection method between the positioning frame 321 and the guide base 37 can be flexibly adjusted according to actual needs, which will not be described in detail here.

[0050] See Figure 2 and Figure 5In some embodiments, the lifting assembly 2 further includes a supporting plate 24 , which is flange-connected to the valve body 12 , and the lifting frame 21 and the push rod 22 are both disposed on the supporting plate 24 .

[0051] In this embodiment, the length direction of the supporting plate 24 is perpendicular to the length direction of the lifting shaft 23 , the lifting frame 21 is fixedly disposed on the supporting plate 24 , and the push rod 22 is rotatably disposed on the supporting plate 24 .

[0052] It should be noted that after the valve disc rotates to abut against the push rod 22, the maintenance personnel can adjust the position of the valve disc and the rocker arm 11 by adjusting the angle of the push rod 22, so that the valve disc and the rocker arm 11 can smoothly enter the interior of the valve body 12. After the position of the valve disc and the rocker arm 11 is determined, the sleeve 31 is engaged with the rocker arm 11 to continue to limit the position of the rocker arm 11 and the valve disc. The support plate 24 is removed from the valve body 12, leaving enough space for the rocker arm 11 and the valve disc to enter the interior of the valve body 12.

[0053] In this way, the lifting frame 21 and the push rod 22 are both set on the support plate 24, and the support plate 24, the lifting frame 21 and the push rod 22 can be quickly removed to facilitate maintenance personnel to send the rocker arm 11 and the valve disc into the valve body 12, so that during the movement and assembly of the rocker arm 11 and the valve disc, the blue oil line is not easy to interfere with the maintenance personnel or other structures, thereby improving the accuracy of the blue oil test.

[0054] It is understandable that the lifting frame 21 can also be detachably mounted on the support plate 24 by means of bolts or other structures, so as to perform blue oil tests on swing check valves of different specifications. The connection method between the lifting frame 21 and the support plate 24 will not be described in detail here.

[0055] See Figure 2 and Figure 5 In some embodiments, the support plate 24 includes a mounting end 241 and two fixed ends 242 . The two fixed ends 242 are respectively disposed at both ends of the mounting end 241 , and the two fixed ends 242 are respectively connected to the valve body 12 by flanges.

[0056] In this embodiment, in the length direction of the lifting shaft 23 , the length of the fixed end 242 is greater than the length of the installation end 241 , that is, the supporting plate 24 is an I-shaped structure.

[0057] In this way, when the fixed end 242 is flange-connected to the valve body 12, the fixed end 242 can provide stable supporting force to the mounting end 241, so that the lifting frame 21 and the push rod 22 can stably lift the rocker arm 11 and the valve disc, avoiding the blue oil line from being interfered with by maintenance personnel or other structures, and improving the accuracy and stability of the blue oil test.

[0058] It is understandable that the shape of the support plate 24 is not limited to the I-shape, and may also be other shapes, which is not limited in this embodiment.

[0059] See Figure 5 In some embodiments, the lifting assembly 2 further includes a lifting positioning plate 25 , which is disposed on the supporting plate 24 , and the push rod 22 is rotatably connected to the lifting positioning plate 25 .

[0060] In this embodiment, the lifting positioning plate 25 is fixedly set on the support plate 24, and the lifting positioning plate 25 is connected to the lifting positioning pin 251. When the lifting positioning pin 251 is inserted into the lifting positioning plate 25 and the push rod 22, it can limit the angle between the push rod 22 and the support plate 24.

[0061] In this way, when the area of ​​the valve disc that is not coated with blue oil abuts against the push rod 22, the position of the valve disc and the rocker arm 11 relative to the valve body 12 can be adjusted by adjusting the angle of the push rod 22, thereby preventing the rocker arm 11 and the valve disc from colliding with the valve body 12 during the descent process, thereby improving the accuracy of the blue oil test.

[0062] It is understandable that the lifting positioning plate 25 can also be detachably set on the supporting plate 24 by bolts, and the connection method between the lifting positioning plate 25 and the supporting plate 24 can be flexibly adjusted according to actual needs, which will not be elaborated here.

[0063] See Figure 2 and Figure 5 In some embodiments, the lifting assembly 2 further includes a support frame 26 , which is detachably connected to the valve body 12 , and both ends of the lifting shaft 23 are respectively connected to the support frame 26 .

[0064] In this embodiment, two support frames 26 are provided, and both ends of the lifting shaft 23 are slidably connected to the two support frames 26 , and the height of the support frames 26 is greater than the height of the lifting frame 21 .

[0065] In this way, the lifting shaft 23 is slidably connected to the support frame 26, which makes it easy to pass the lifting shaft 23 through the support frame 26 and the end of the rocker arm 11 away from the valve disc, thereby assembling the rocker arm 11 on the support frame 26. The support frame 26 can provide support for the lifting shaft 23 so that the rocker arm 11 can rotate stably around the lifting shaft 23, reducing the contact between the maintenance personnel and the blue oil line during operation, and improving the accuracy and efficiency of the blue oil test.

[0066] See Figure 2 and Figure 5 In some embodiments, the support frame 26 is fixedly connected to a mounting frame 261 , and the mounting frame 261 is flange-connected to the valve body 12 .

[0067] The mounting frame 261 is an annular structure, that is, the shape of the mounting frame 261 is adapted to the edge of the valve body 12 , the supporting plate 24 is detachably connected to the mounting frame 261 , and the lifting frame 21 is located between the two supporting frames 26 .

[0068] In this way, the mounting bracket 261 is flange-connected to the valve body 12, which not only limits the relative position of the lifting shaft 23 and the valve body 12, but also makes the structure of the lifting assembly 2 more compact, facilitates operation by maintenance personnel, and improves the accuracy of the blue oil test.

[0069] The operating principle of the swing check valve blue oil test device is as follows:

[0070] Install the support plate 24, mounting frame 261, guide base 37, and positioning frame 321 to the valve body 12, assemble the valve disc and rocker arm 11, place the valve disc and rocker arm 11 on the lifting frame 21, and pass the lifting shaft 23 through the rocker arm 11 and the support frame 26 so that the rocker arm 11 can rotate around the central axis of the lifting shaft 23. After applying blue oil on the sealing surface, flip the rocker arm 11 and the valve disc and make the valve disc abut against the push rod 22. Adjust the angle of the push rod 22 to make the rocker arm 11 and the valve disc in the appropriate position, and ensure that after the valve disc falls, there is enough space in the valve cavity of the valve body 12 to pull out the pull rod 34 and the sleeve 31.

[0071] Pass the guide shaft 33 through the connecting pipe 341 and insert it into the limit groove 361, adjust the position of the sleeve 31 so that the inclination angle of the sleeve 31 and the rocker arm 11 are consistent, so that the sleeve 31 and the rocker arm 11 are stably connected, remove the support plate 24 from the valve body 12, and control the pull rod 34 to make the valve disc and the rocker arm 11 steadily descend and enter the interior of the valve body 12, and connect the rocker arm 11 to the valve body 12 through the pin shaft, pull out the sleeve 31 to make the valve disc fall and hit the valve seat, completing a blue oil test.

[0072] Remove the guide shaft 33 from the slider 36, adjust and fix the angle of the sleeve 31 so that it is re-engaged with the rocker arm 11, pull up the pull rod 34 to separate the valve disc and the valve seat and make the holes on the pull rod 34 and the slider 36 coaxial, then pass the guide shaft 33 through the connecting pipe 341 and the slider 36, remove the pin between the rocker arm 11 and the valve body 12, pull out the valve disc upwards and check the blue oil line.

[0073] 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 blue oil test device for a swing check valve, characterized in that: The blue oil test device for a swing check valve is connected to a valve body (1), wherein the valve body (1) comprises a rocker arm (11), a valve flap, and a valve body (12), wherein the valve flap is connected to the rocker arm (11), and the rocker arm (11) is detachably connected to the valve body (12). The blue oil test device for a swing check valve comprises: A lifting assembly (2), the lifting assembly (2) comprising a lifting frame (21), a push rod (22) and a lifting shaft (23), the lifting frame (21) and the push rod (22) being detachably connected to the valve body (12), the push rod (22) being rotatably arranged above the valve body (12), the lifting frame (21) and the push rod (22) being respectively arranged on both sides of the lifting shaft (23), the lifting shaft (23) being selectively connected to the rocker arm (11) so that the end of the rocker arm (11) away from the valve disc rotates around the central axis of the lifting shaft (23); A guide assembly (3), the guide assembly (3) comprising a clamping sleeve (31), the clamping sleeve (31) being slidably connected to the valve body (12), and a positioning groove (311) being provided on the clamping sleeve (31) for selectively clamping the rocker arm (11) and the clamping sleeve (31).

2. The blue oil testing device for a swing check valve according to claim 1, characterized in that: The guide assembly (3) also includes a guide rail (32), a guide shaft (33) and a pull rod (34), wherein the guide rail (32) is arranged above the valve body (12), the guide shaft (33) is connected to the guide rail (32) and slides along the length direction of the guide rail (32), one end of the pull rod (34) is connected to the guide shaft (33) so that the pull rod (34) rotates around the central axis of the guide shaft (33), and the other end is rotationally connected to the sleeve (31).

3. The blue oil testing device for a swing check valve according to claim 2, characterized in that: The clamping sleeve (31) is connected to a clamping plate (312), and the guide assembly (3) includes two groups of guide positioning disks (35) arranged on the clamping plate (312), and the two groups of guide positioning disks (35) are respectively arranged on both sides of the clamping sleeve (31), and there are two pull rods (34), and the guide positioning disks (35) are rotatably connected to the pull rods (34) in a one-to-one correspondence.

4. The blue oil testing device for a swing check valve according to claim 2, characterized in that: The guide assembly (3) further includes a slider (36), the slider (36) being slidably disposed on the guide rail (32), the guide shaft (33) being connected to the slider (36), and the end of the pull rod (34) facing away from the sleeve (31) being connected to a connecting tube (341), the connecting tube (341) being sleeved on the guide shaft (33).

5. The blue oil testing device for a swing check valve according to claim 2, characterized in that: The guide assembly (3) further comprises a guide base (37), wherein the guide base (37) is flange-connected to the valve body (12), and the guide rail (32) is connected to a positioning frame (321), wherein the positioning frame (321) is detachably arranged on the guide base (37).

6. The blue oil testing device for a swing check valve according to claim 1, characterized in that: The lifting assembly (2) further comprises a supporting plate (24), the supporting plate (24) being flange-connected to the valve body (12), and the lifting frame (21) and the push rod (22) being both arranged on the supporting plate (24).

7. The blue oil testing device for a swing check valve according to claim 6, characterized in that: The support plate (24) includes a mounting end (241) and two fixed ends (242), the two fixed ends (242) are respectively arranged at both ends of the mounting end (241), and the two fixed ends (242) are respectively flange-connected to the valve body (12).

8. The blue oil testing device for a swing check valve according to claim 6, characterized in that: The lifting assembly (2) further comprises a lifting positioning plate (25), wherein the lifting positioning plate (25) is arranged on the supporting plate (24), and the push rod (22) is rotatably connected to the lifting positioning plate (25).

9. The blue oil testing device for a swing check valve according to claim 1, characterized in that: The lifting assembly (2) further comprises a support frame (26), the support frame (26) being detachably connected to the valve body (12), and both ends of the lifting shaft (23) being respectively connected to the support frame (26).

10. The blue oil testing device for a swing check valve according to claim 9, characterized in that: The support frame (26) is fixedly connected to a mounting frame (261), and the mounting frame (261) is flange-connected to the valve body (12).

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