Online valve replacement tool and replacement method thereof

Abstract

The invention belongs to the technical field of valve overhaul and maintenance, and particularly relates to an on-line valve replacement tool and a replacement method thereof.The on-line valve replacement tool comprises an octagonal pad displacement tool body, the octagonal pad displacement tool body is installed on an octagonal pad of a valve flange opening, abuts against the octagonal pad through a jackscrew and is used for moving the octagonal pad, and the octagonal pad displacement tool body is installed on the octagonal pad; adjusting the gaps between the octagonal pad and the valve flange opening and the pipeline flange opening; the split sealing plate is used for ejecting out the octagonal pad and is assembled in a gap between the valve flange opening and the pipeline flange opening, and a split blocking sealing shaft is arranged on the split sealing plate and is used for blocking an inner cavity of the pipeline flange opening; and the valve plugging mounting frame is fixed on the pipeline, is connected with the split type plugging sealing shaft through a central through buckle screw rod, and is used for supporting the pipeline and the split type plugging sealing shaft when the valve is dismounted. The problem that a flange face is difficult to clean when the valve is replaced is solved, loss of a catalyst is reduced, and the problem of leakage caused by factors such as large pipeline catalyst leakage and blockage incapability is fundamentally solved.

Description

Technical Field

[0001] The invention belongs to the technical field of valve inspection and maintenance, and in particular relates to an online valve replacement tool and a replacement method thereof. Background Art

[0002] The reactor equipment has been in operation for a long time, and the reactor pipeline has been locally thinned due to internal catalyst erosion, valve plates not opening and closing properly, valve packing loss and leakage, etc., so it needs to be dismantled, repaired and replaced. There are currently two construction plans.

[0003] (1) Close the local pipe network system, discharge the catalyst from the bottom of the reactor, and then replace the pipeline valve. This solution can fundamentally solve the problem, but the maintenance cycle is long. The maintenance cost is high, the on-site workload is large, and it is time-consuming and labor-intensive.

[0004] (2) Temporary treatment: Normally, there are two valves at the bottom of the reactor, and there is a short-circuit connection between the two valves. To replace the lower valve, you only need to close the upper valve to replace the lower valve. However, when replacing the first manual valve, the pipeline is full of catalyst. Improper operation may cause large catalyst leakage and the risk of failure to seal. Direct replacement, inserting a thin iron plate into the flange mouth or other fillers into the flange pipeline to block it, making it difficult to clean the catalyst from the sealing surface of the valve and the octagonal concave groove on the flange surface, remove the filler, and reinstall the valve. It is also easy to cause leakage when the temperature and pressure are increased during operation (the medium in the pipeline is hydrogen).

[0005] Therefore, there is currently a lack of a safe and efficient valve replacement solution. Summary of the invention

[0006] In view of the defects of the above-mentioned prior art, the purpose of the present invention is to provide a simple and easy special valve changer, which can better replace and handle, solve the difficulty of cleaning the flange surface when replacing the valve, minimize the loss of catalyst, and ensure the smooth operation of the start-up equipment.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: Online valve replacement tooling, including: An octagonal pad shifting tool, which is installed on the octagonal pad of the valve flange, and is supported on the octagonal pad by a top screw, and is used to move the octagonal pad and adjust the gap between the octagonal pad and the valve flange and the pipeline flange; The split sealing plate is used to push out the octagonal gasket and is assembled in the gap between the valve flange and the pipeline flange. The split sealing plate is provided with a split plugging sealing shaft to plug the inner cavity of the pipeline flange. A valve plugging mounting frame is fixed on the pipeline, and the valve plugging mounting frame is connected to the split plugging sealing shaft through a center through-screw, so as to support the pipeline and the split plugging sealing shaft when the valve is removed.

[0008] Furthermore, the octagonal pad displacement tooling includes two semicircular fixing rings, the two semicircular fixing rings are provided with connecting plate ears, the connecting plate ears are threadedly connected with tooling connecting bolts, the two semicircular fixing rings are connected and fixed to the outside of the valve flange and the pipeline flange through the connecting plate ears and the tooling connecting bolts, the two fixing rings are provided with a plurality of radial internal threaded holes, the internal threaded holes are connected with the top screws, and a plurality of the top screws are supported on the octagonal pad.

[0009] Furthermore, the split sealing plate includes a sealing plate and a positioning arc plate arranged at one end of the sealing plate, the sealing plate is assembled in the gap between the valve flange opening and the pipeline flange opening, and the octagonal gasket is pushed out at the same time, and an inward-concave assembly groove is arranged in the middle of the sealing plate, and the split-type plugging sealing shaft is movably assembled in the assembly groove, and a through hole is formed at the bottom of the assembly groove for the center through-button screw to pass through, and the split-type plugging sealing shaft can be axially separated from the sealing plate from the top of the assembly groove, and a positioning internal thread screw hole for connecting the pipeline flange is arranged on the sealing plate; the positioning arc plate is positioned in cooperation with the outer circumferential surface of the pipeline flange.

[0010] Furthermore, the split-type plugging sealing shaft is arranged into a conical structure, and a circular silicone plate is arranged at the bottom of the split-type plugging sealing shaft, and the silicone plate is pressed by a pressure pad below the silicone plate and fixed by a pressure bolt, and a connecting inner thread hole with a bottom opening is arranged in the split-type plugging sealing shaft, and a center hole corresponding to the connecting inner thread hole is formed on the silicone plate and the pressure pad, and the connecting inner thread hole is used to connect the center through-button screw, and a circumferential positioning mechanism fixed to the circumferential direction of the sealing plate is arranged on the side surface of the pressure pad; when the split-type plugging sealing shaft, the silicone plate and the pressure pad are connected to form a whole to seal the inner cavity of the pipeline flange mouth, the silicone plate and the inner cavity of the pipeline flange mouth have an interference fit.

[0011] Furthermore, the clamping bolt is a flat countersunk bolt.

[0012] Furthermore, the end surface of the sealing plate away from one end of the positioning arc plate is set as an arc surface, and the arc surface is in contact with the outer circumferential surface of the octagonal pad; four positioning internal thread screw holes are provided on the sealing plate, which are respectively located at the four corners of the sealing plate, and the four positioning internal thread screw holes correspond one by one to four bolt holes of the pipeline flange; the circumferential positioning mechanism is a convex block extending radially on the side surface of the pressure pad, and the sealing plate is provided with a positioning groove matched with the convex block, and the upper surface of the positioning groove is connected to the assembly groove.

[0013] Furthermore, the valve plugging mounting frame also includes a pipe clamp tooling, a support screw, an upper pressure plate and a lower pressure plate. The pipe clamp tooling is fixed on the pipeline, and the support screw is connected to the pipe clamp tooling. Two screw nuts are threadedly connected to the center through-button screw. Rotating the screw nuts drives the center through-button screw to move linearly. A pressure plate support nut is threadedly connected to the support screw. The upper pressure plate and the lower pressure plate are U-shaped pressure plates with open long holes. The upper pressure plate and the lower pressure plate are respectively assembled on the support screw and the center through-button screw through the open long holes. The pressure plate support nut locks the upper pressure plate and the lower pressure plate under the two screw nuts respectively. The upper pressure plate and the lower pressure plate provide support for the center through-button screw. The disassembly and installation process of the center through-button screw passing through the valve is carried out by alternately removing the upper pressure plate and the lower pressure plate.

[0014] Furthermore, there are two support screws, which are respectively located on both sides of the center through-thread screw. The center through-thread screw and the two support screws are arranged side by side on the same plane. Two screw nuts are arranged on the center through-thread screw, and two pressure plate support nuts are arranged on each support screw. The upper pressure plate and the lower pressure plate are locked from bottom to top to under the two screw nuts through the pressure plate support nuts on the support screws on both sides.

[0015] Furthermore, a reinforcing cap for supporting the bottom of the split plugging seal shaft is connected to the upper portion of the center through-thread screw.

[0016] Furthermore, the pipe clamp tooling includes two semicircular clamping rings, which are fixed to the outer wall of the pipeline and locked by clamping ring bolts. A support plate is fixed on the clamping ring, and a screw connecting through hole for connecting the support screw is provided on the support plate.

[0017] The replacement method using the above-mentioned online valve replacement tooling comprises the following steps: Step S100: Install the octagonal pad shifting tool; there are a total of eight flange bolts between the valve flange and the pipeline flange, remove four of the flange bolts, loosen the remaining four flange bolts, install two semicircular ring fixing rings outside the valve flange and the pipeline flange, tighten the two tool connection bolts to make the two semicircular ring fixing rings form a whole, adjust the top screw on the shifting tool to be stuck on the octagonal pad, and move the tool to drive the octagonal pad to the middle position of the valve flange and the pipeline flange, so that the gap between the two flanges is greater than the thickness of the sealing plate, and remove the octagonal pad shifting tool; Step S200: Install the sealing plate; push the sealing plate between the valve flange and the pipeline flange, and at the same time, the sealing plate pushes the octagonal gasket out of the flange, and the positioning arc plate on the sealing plate is tightly fitted with the outer peripheral surface of the pipeline flange. At this time, the split plugging seal shaft is in the middle of the pipeline flange; connect the four positioning internal thread screw holes of the sealing plate and the four bolt holes left by removing the flange bolts of the pipeline flange through four sealing plate connecting bolts, so that the sealing plate and the pipeline flange form an integrated closed structure; Step S300: dismantle the valve; remove the remaining four flange bolts to separate the valve from the pipeline flange, and dismantle the lower valve; Step S400: Install the valve plugging mounting frame; fix the pipe clamp tooling on the outer wall of the pipeline, drive the split plugging seal shaft and the silicone plate into the pipeline flange for plugging through the center through-thread screw, install the upper pressure plate and the lower pressure plate under the two screw nuts respectively, and tighten the nuts through the pressure plate support to fix the center through-thread screw; Step S500: remove the sealing plate; remove the four sealing plate connecting bolts, pull out the upper pressure plate, retract the sealing plate along the center through-thread screw to the upper part of the lower pressure plate, install the upper pressure plate, rotate and adjust the upper pressure plate support nut, hold the upper pressure plate under the upper screw nut, lock the upper pressure plate, support the center through-thread top screw, so that the split plugging sealing shaft does not sink, pull out the lower pressure plate, and remove the sealing plate; Step S600: Install the valve; clean the sealing surface of the pipeline flange for maintenance, put the octagonal gasket, the repaired valve or the new valve into the valve plugging mounting frame along the center through-button screw, install the lower pressure plate, rotate and adjust the lower pressure plate support nut, hold the lower pressure plate under the lower screw nut, lock the lower pressure plate, support the center through-button top screw, so that the split plugging seal shaft does not sink, pull out the upper pressure plate, align the octagonal gasket, valve flange and pipeline flange, and tighten the installation flange bolts; Step S700: Remove the tooling; rotate the upper screw nut to allow the center through screw to drive the split plugging seal shaft and the silicone plate to retreat to the lower part of the valve plate, close the valve, and remove the valve plugging mounting frame.

[0018] Furthermore, in step S100, the four flange bolts before and after the valve handle are removed, and the remaining four flange bolts on both sides are loosened by 5 mm to see whether the octagonal gasket is stuck in the upper and lower grooves of the flange mouth. After knocking it loose, install the octagonal gasket shifting tooling, and continue to loosen the remaining four flange bolts until the gap between the two flanges is greater than the thickness of the sealing plate. Keep the octagonal gasket in the middle position of the upper and lower flange mouths, rotate the octagonal gasket until the groove of the lower flange mouth is filled with the catalyst, and remove the octagonal gasket shifting tooling.

[0019] Furthermore, in step S400, when installing the valve plugging mounting frame, only the lower pressure plate is installed, and when the sealing plate is moved to above the lower pressure plate, the upper pressure plate is installed.

[0020] Furthermore, in step S600, after cleaning and repairing the pipeline flange sealing surface, the replaced new valve or the repaired valve plate is in a fully open state.

[0021] Furthermore, a replacement method for a line valve replacement tool is provided for improving the replacement of pipeline valves; there are two valve controls on the pipeline, and a short circuit connection is provided between the two valves. When replacing the first valve, the tool acts on the first valve, and during the valve removal process in step S300, the first valve, the ground ring and the second valve under the sealing plate are all removed.

[0022] The beneficial effects of the present invention are as follows: the present invention can solve the difficulty in cleaning the flange surface when replacing the valve, minimize the loss of catalyst, and fundamentally solve the leakage problems caused by factors such as full tube catalyst in the pipeline, improper operation, large catalyst leakage, and failure to block. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the structural diagram of the lift pipeline valve group; Figure 2 This is a schematic diagram of the installation of the octagonal pad shifting tooling; Figure 3 This is a top view of the octagonal pad shifting tooling; Figure 4 This is a schematic diagram of the installation of the split sealing plate; Figure 5 for Figure 4 Enlarged view of the middle split sealing plate; Figure 6 It is a top view of the sealing plate structure; Figure 7 This is a schematic diagram of the sealing plate connection assembly; Figure 8 It is a top view of the sealing plate connection assembly; Fig. 9 Assembly drawing for valve plugging mounting frame; Fig.10 This is a schematic diagram of the pipe clamp tooling; Fig.11 It is a schematic diagram of the structure of the upper pressing plate and the lower pressing plate; Fig.12 Valve plugging installation frame operation instructions Figure 1 ; Fig.13 Operation diagram of valve plugging installation frame Figure 2 ; Fig.14 for Fig.13 Side view of Fig.15 For valve installation and operation Figure 1 ; Fig.16 For valve installation and operation Figure 2 ; Fig.17 For valve installation and operation Figure 3 ; In the figure: 1. valve, 2. catalyst, 3. pipeline, 4. octagonal gasket shifting tool, 401. top screw, 402. tooling connecting bolt, 403. internal thread hole, 404. fixing ring, 405. connecting plate ear, 5. pipeline flange, 501. pipeline flange bolt hole, 6. valve flange, 7. octagonal gasket, 8. split sealing plate, 801. split plugging sealing shaft, 802. flat countersunk bolt, 803. connecting internal thread hole, 804. silicone plate, 805. circumferential positioning mechanism, 806. positioning internal thread screw hole, 807. positioning arc plate, 808. sealing plate, 809. pressure pad, 9. sealing plate connecting bolt, 10. valve plugging mounting frame, 1001. pipe clamp tool, 1002. center through screw, 1003. strengthening spare cap, 1004, upper pressure plate, 1005, screw and nut, 1006, lower pressure plate, 1007, supporting screw, 1008, pressure plate supporting nut. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0025] See attached Figure 1-17 To achieve the above purpose, the technical solution adopted by the present invention is: Online valve replacement tooling, including an octagonal pad shifting tooling 4, a split sealing plate 8 and a valve plugging mounting frame 10; The octagonal pad shifting tool 4 is installed on the octagonal pad 7 of the valve flange. The octagonal pad shifting tool is supported on the octagonal pad 7 by the top screw 401, and is used to move the octagonal pad 7 and adjust the gap between the octagonal pad 7 and the valve flange and pipeline flange; loosen the octagonal pad and make the gap between the valve flange and the pipeline flange slightly larger than the thickness of the sealing plate.

[0026] Specifically, the octagonal pad shifting tool 4 includes two semicircular fixing rings 404, the two semicircular fixing rings 404 are provided with connecting plate ears 405, and the connecting plate ears 405 are threadedly connected with tool connecting bolts 402. The two semicircular fixing rings 404 are connected and fixed to the outside of the valve flange 6 and the pipeline flange 5 through the connecting plate ears 405 and the tool connecting bolts 402. Four radial internal threaded holes 403 are provided on the two fixing rings 404, and the internal threaded holes 403 are connected with top screws 401. The four top screws 401 are supported on the octagonal pad 7.

[0027] Based on the above technical solution, the octagonal gasket shifting tool 4 adjusts the position of the octagonal gasket 7 in the flange so that the octagonal gasket 7 is in the middle position of the loosened flange. The size between the valve flange and the pipeline flange can allow the sealing plate 808 to pass through while preventing the pipeline catalyst from flowing out.

[0028] The assembly and use process is as follows: the octagonal pad shifting tool 4 can be installed on the octagonal pad 7 of the flange mouth, and is used to fine-tune the gap between the octagonal pad and the flange mouth to prevent the gap from being too large and the catalyst from leaking. Before loosening the flange mouth bolts, mark the octagonal pad end face and the flange plane. There are a total of eight bolts on the flange. Remove the four bolts before and after the valve handle, and loosen the remaining four bolts on both sides to leave a gap of about 5 mm. Check whether the octagonal pad is stuck in the upper and lower grooves of the flange mouth. After knocking it loose, install the octagonal pad shifting tool, and continue to loosen the remaining four bolts to keep the octagonal pad in the middle position of the upper and lower flange mouths. Gently rotate the octagonal pad until the groove of the lower flange mouth is filled with the catalyst, and then remove the octagonal pad shifting tool.

[0029] The split sealing plate 8 is used to push out the octagonal gasket 7 and is assembled in the gap between the valve flange and the pipeline flange. The split sealing plate 8 is provided with a split plugging sealing shaft 801 for plugging the inner cavity of the pipeline flange. Specifically, the split sealing plate 8 includes a sealing plate 808 and a positioning arc plate 807 arranged at one end of the sealing plate 808. The sealing plate 808 is assembled in the gap between the valve flange opening and the pipeline flange opening, and the octagonal gasket 7 is pushed out at the same time. An inwardly concave assembly groove is arranged in the middle of the sealing plate, and the split plugging sealing shaft 801 is movably assembled in the assembly groove. The split plugging sealing shaft 801 is not higher than the upper surface of the sealing plate 808 to avoid affecting the assembly of the sealing plate between the valve flange and the pipeline flange.

[0030] Furthermore, a through hole is formed at the bottom of the assembly groove for the center through-thread screw 1002 to pass through, and the split plugging sealing shaft 801 in the assembly groove is connected through the center through-thread screw 1002 to control the split plugging sealing shaft 801 to axially separate from the sealing plate 808 from the top of the assembly groove.

[0031] Furthermore, the split plugging seal shaft 801 is set to a conical structure, and a circular silicone plate 804 is set at the bottom of the split plugging seal shaft 801. The silicone plate 804 is pressed by a pressure pad 809 below the silicone plate 804 and fixed by a flat countersunk bolt 802. A pressure pad 809 is connected and pressed by two flat countersunk bolts 802 behind the lower silicone plate 804 to ensure that the silicone plate 804 is not easy to fall off. The split plugging seal shaft 801, the silicone plate 804 and the pressure pad 809 are connected and pressed by two flat countersunk bolts 802 to form a whole. The diameter of the silicone plate 804 is slightly larger than the inner diameter of the pipeline flange, and the elastic deformation ability of the silicone plate 804 is used to seal the pipeline flange. The diameter of the pressure pad 809 is smaller than the diameter of the silicone plate 804, and the assembly groove supports the lower bottom surface of the silicone plate 804. The pressure pad 809 is located in the through hole at the bottom of the assembly groove.

[0032] Based on the above technical solution, the split plugging seal shaft 801, the silicone plate 804 and the pressure pad 809 are connected to form a whole. When plugging the inner cavity of the pipeline flange, the silicone plate 804 has an interference fit with the inner cavity of the pipeline flange. The sealing plate 808 acts as a temporary blind cover to prevent the catalyst from flowing and overflowing. The split plugging seal shaft 801 is supported by the valve plugging mounting frame 10, so that the split plugging seal shaft enters the pipeline flange 5 to prevent the catalyst from flowing out. The sealing plate 808 is removed to more clearly inspect and repair the upper flange sealing surface.

[0033] Furthermore, a connecting inner thread hole 803 with a bottom opening is provided in the split-type plugging sealing shaft 801, and the connecting inner thread hole 803 is used for threaded connection with the center through-thread screw 1002. Center holes corresponding to the connecting inner thread hole are formed on the silicone plate 804 and the pressure pad 809. The center through-thread screw 1002 passes through the through hole of the sealing plate 808, the center hole of the pressure pad 809 and the center hole of the silicone plate 804 in sequence and is connected to the connecting inner thread hole 803 of the split-type plugging sealing shaft 801.

[0034] Based on the above technical solution, the split plugging sealing shaft 801 is designed as a conical structure to reduce friction. There is a circular silicone plate 804 at the bottom to prevent the catalyst from leaking downward. There is a connecting inner thread hole 803 at the bottom for adjusting the center through-thread screw 1002 up and down. Due to the limited clearance of the flange mouth, the sealing plate is pushed into the flange mouth and then connected to the center through-thread screw 1002.

[0035] Furthermore, the sealing plate 808 is provided with four positioning internal thread screw holes 806 for connecting the pipeline flange 5, which are respectively located at the four corners of the sealing plate 808. The four positioning internal thread screw holes 806 correspond to the four flange bolt holes before and after the handle of the pipeline flange, and the aperture and hole spacing of the positioning internal thread screw holes 806 are consistent with the aperture and hole spacing of the pipeline flange 5. The sealing plate 808 is connected and fixed to the pipeline flange 5 by the sealing plate connecting bolts 9.

[0036] Furthermore, the positioning arc plate 807 cooperates with the outer peripheral surface of the pipeline flange for positioning.

[0037] Furthermore, the end surface of the sealing plate 808 away from one end of the positioning arc plate is set as an arc surface, and the arc surface fits with the outer peripheral surface of the octagonal pad 7, so that the octagonal pad can be pushed out smoothly.

[0038] Furthermore, a circumferential positioning mechanism 805 is provided on the side surface of the pressure pad 809 and is fixed to the sealing plate 808 in the circumferential direction, so that the pressure pad 809 and the sealing plate 808 are connected as a whole in the circumferential direction, preventing the split-type blocking seal shaft 801 from rotating synchronously and the center through-screw 1002 from disengaging when the center through-screw 1002 is screwed into the connecting inner thread hole 803 of the split-type blocking seal shaft 801.

[0039] In one embodiment, the circumferential positioning mechanism is a convex block extending radially on the side surface of the pressure pad 809, and a positioning groove matching the convex block is provided on the sealing plate 808. The convex block is tightly connected with the sealing plate positioning groove, so that the split plugging sealing shaft 801 and the sealing plate 808 are integrated in the circumferential direction to prevent the split plugging sealing shaft 801 from rotating. When the center through screw 1001 is rotated, the center through screw 1011 is not easy to be disengaged due to the convex groove being stuck. The upper surface of the positioning groove is connected with the assembly groove, so that the convex block is easy to be separated from the sealing plate from above the positioning groove.

[0040] In another embodiment, the circumferential positioning mechanism is a positioning pin hole correspondingly provided on the side surface of the pressure pad 809 and the sealing plate 808, and the positioning pin hole is equipped with a positioning pin for positioning the split plugging sealing shaft 801 and the sealing plate 808. The positioning pin makes the split plugging sealing shaft 801 and the sealing plate 808 form a whole in the circumferential direction to prevent the split plugging sealing shaft 801 from rotating. The upper surface of the positioning pin hole is connected to the assembly groove, which facilitates the rapid separation of the positioning pin and the positioning pin hole when the split plugging sealing shaft 801 is longitudinally displaced.

[0041] The assembly and use process is as follows: push the split sealing plate 8 into the gap between the valve flange and the pipeline flange, push out the octagonal gasket 7, connect the four positioning internal thread screw holes 806 of the sealing plate to the valve flange, tighten the four sealing plate connecting bolts 9, open the second valve, discharge the catalyst at the bottom of the split sealing plate 8 into the lifting tank, remove the remaining four bolts connecting the valve flange 6 and the pipeline flange 7, remove the valve, ground ring and other components under the sealing plate, leaving assembly space for the valve sealing mounting frame, install the valve sealing mounting frame 10, tighten the center through-thread screw 1002 and the upper pressure plate, and the upper pressure plate support nut.

[0042] The valve plugging mounting frame 10 is fixed on the pipeline, and the valve plugging mounting frame 10 is connected to the split plugging sealing shaft 801 through a center through-screw 1002, so as to support the pipeline and the split plugging sealing shaft 801 when the valve is removed.

[0043] Specifically, the valve plugging mounting frame includes the center through-buckle screw 1002, a pipe clamp tool 1001, a support screw 1007, an upper pressure plate 1004 and a lower pressure plate 1006. The pipe clamp tool 1001 is fixed on the pipeline, and the support screw 1007 is connected to the pipe clamp tool 1001. Two screw nuts 1005 are threadedly connected to the center through-buckle screw 1001. Rotating the upper screw nut drives the center through-buckle screw 1002 to move linearly. Two pressure plate support nuts 1008 are threadedly connected to the support screw 1007. The pressure plate support nuts 1008 respectively lock the upper pressure plate 1004 and the lower pressure plate 1006 under the two screw nuts 1005. The upper pressure plate 1004 and the lower pressure plate 1006 jointly provide support for the center through-buckle screw 1002. Rotate the upper screw nut in the opposite direction to move the center through-thread screw 1002 upward, lengthen the center through-thread screw 1002 on the upper part of the upper pressure plate, and drive the split plugging seal shaft 801 to enter the pipeline flange 5. The silicone plate 804 below the split plugging seal shaft 801 blocks the pipeline flange opening to prevent the catalyst in the pipeline from leaking out. The split plugging seal shaft 801 is separated from the sealing plate 808.

[0044] Furthermore, there are two support screws 1007, which are respectively located on both sides of the center through-button screw 1002. The center through-button screw 1002 and the two support screws 1007 are arranged side by side on the same plane. The upper pressure plate 1004 and the lower pressure plate 1006 are locked on the center through-button screw 1002 and the two support screws 1007 to ensure the stability of the valve sealing mounting frame. Two screw nuts 1005 are arranged on the center through-button screw 1002, and two pressure plate support nuts 1008 are arranged on each support screw. The upper pressure plate 1004 and the lower pressure plate 1005 are locked from bottom to top to below the two screw nuts 1005 through the pressure plate support nuts 1008 on the support screws 1007 on both sides.

[0045] Furthermore, the upper pressing plate 1004 and the lower pressing plate 1005 are U-shaped pressing plates with open long holes, and the upper pressing plate 1004 and the lower pressing plate 1006 are respectively assembled on the two supporting screws 1007 and the center through-thread screw 1002 through the open long holes. By alternately removing the upper pressing plate 1004 and the lower pressing plate 1006, the disassembly and installation process of the center through-thread screw 1002 in the valve is carried out.

[0046] Based on the above technical solution, the upper pressure plate 1004 and the lower pressure plate 1005 are designed with a rectangular open pressure plate on one side, which is convenient to be pulled out from the side, and the four sealing plate connecting bolts 9 connecting the sealing plate 808 and the pipeline flange are removed, and the sealing plate 808 is withdrawn to the upper part of the lower pressure plate 1006, and the upper pressure plate 1004 is installed, and the upper pressure plate support nut is adjusted, and the lower pressure plate 1006 is pulled out to remove the sealing plate 808. The valve plugging mounting frame 10 allows the split plugging seal shaft 801 to enter the pipeline flange 5 for plugging by replacing the upper pressure plate 1004 and the lower pressure plate 1006, and the sealing plate is removed to check the sealing surface and install the valve.

[0047] Furthermore, a reinforcing cap 1003 for supporting the bottom of the split plugging sealing shaft 801 is connected to the upper part of the center through-thread screw 1002, and the diameter of the through hole below the sealing plate assembly groove is larger than the diameter of the reinforcing cap 1003 to facilitate the reinforcing cap 1003 to pass through the sealing plate 808.

[0048] Furthermore, the pipe clamp tool 1001 includes two semicircular clamping rings, which are fixed to the outer wall of the pipeline and locked by clamping ring bolts. A support plate is fixed on the clamping ring, and a screw connecting through hole for connecting the support screw 1007 is provided on the support plate.

[0049] The valve process is as follows: After cleaning and repairing the pipeline flange sealing surface, the new valve to be replaced or the repaired valve disc is in a fully open state. The new octagonal gasket and valve cavity are moved along the center through screw 1002 to the lower part of the upper pressure plate 1004, and the lower pressure plate 1006 is inserted. The lower pressure plate support nut is adjusted (at this time, the upper part of the lower pressure plate is locked by the screw nut 1005, and the lower part of the lower pressure plate is locked by the lower pressure plate support nut, which is used to control the speed of withdrawing the center through screw), the upper pressure plate 1004 is pulled out, the valve flange and the pipeline flange bolts are connected, and the screw nut of the lower pressure plate is rotated to shorten the center through screw 1002 on the upper part of the lower pressure plate 1006, and the upper part of the center through screw 1002 is withdrawn to the lower part of the valve disc, the valve disc is closed, and the upper part of the center through screw 1002 is withdrawn to the outside of the lower flange of the valve, and the upper and lower pressure plates are removed, and the valve plugging mounting frame is removed. This work is completed.

[0050] See attached Figure 1-17 The replacement method of the online valve replacement tooling mentioned above comprises the following steps: Step S100: Install the octagonal pad shifting tool There are a total of eight flange bolts between the valve flange 6 and the pipeline flange 5. Before loosening the flange bolts, mark the end face of the octagonal gasket 7 and the flange plane, remove the four flange bolts before and after the valve handle, and loosen the remaining four flange bolts on both sides with a gap of 5mm to see whether the octagonal gasket 7 is stuck in the upper and lower grooves of the flange mouth. After knocking it loose, install the octagonal gasket shifting tool 4, install the two semicircular annular fixing rings 404 outside the valve flange 6 and the pipeline flange 5, tighten the two tooling connecting bolts 402, so that the two semicircular annular fixing rings 404 form a whole, adjust the four top screws 401 on the shifting tool to be stuck on the octagonal gasket 7, and move the tool to drive the octagonal gasket 7 to the middle position of the valve flange 6 and the pipeline flange 5, continue to loosen the remaining four flange bolts until the gap between the two flanges is greater than the thickness of the sealing plate 808, keep the octagonal gasket 7 in the middle position of the upper and lower flange mouths, rotate the octagonal gasket 7 until the groove of the valve flange mouth below is filled with the catalyst, and remove the octagonal gasket shifting tool 4; Step S200: Installing the sealing plate Push the sealing plate 808 between the valve flange 6 and the pipeline flange 5, and at the same time, the sealing plate 808 pushes the octagonal gasket 7 out of the flange, and the positioning arc plate 807 on the sealing plate is tightly fitted with the outer peripheral surface of the pipeline flange. At this time, the split plugging sealing shaft 801 is in the middle of the pipeline flange 5; connect the four positioning internal thread screw holes 806 of the sealing plate and the four bolt holes left by removing the flange bolts of the pipeline flange through four sealing plate connecting bolts 9, so that the sealing plate 808 and the pipeline flange 5 form an integrated closed structure; Step S300: Remove the valve Remove the remaining four flange bolts through the pipeline flange to disengage the valve from the pipeline flange 5, and remove the lower valve of the sealing plate 8, the ground ring, and the second valve; Step S400: Install the valve plugging mounting frame Fix the pipe clamp tooling 1001 on the outer wall of the pipeline, rotate and adjust the screw nut 1005, drive the split plugging seal shaft 801 and the silicone plate 804 into the pipeline flange 5 for plugging through the center through screw 1002, install the upper pressure plate 1004 and the lower pressure plate 1006 under the two screw nut 1005 respectively, and tighten them through two sets of pressure plate support nuts 1008 to fix the center through screw 1002; Step S500: removing the sealing plate Adjust the lower pressure plate 1004 and the upper pressure plate 1006 to lock synchronously, remove the four sealing plate connecting bolts 9, pull out the upper pressure plate 1004, retreat the sealing plate along the center through-thread screw 1002 to the upper part of the lower pressure plate 1004, install the upper pressure plate 1004, rotate and adjust the upper pressure plate support nut, hold the upper pressure plate under the upper screw nut, lock the upper pressure plate 1004, support the center through-thread top screw 1002, so that the split plugging sealing shaft 801 does not sink, pull out the lower pressure plate 1006, and remove the sealing plate 808; Step S600: Install the valve Clean and repair the sealing surface of the pipeline flange, open the valve plate of the new valve or the repaired valve, put the octagonal gasket, the repaired valve or the new valve into the valve plugging mounting frame 10 along the center through-button screw 1002, install the lower pressure plate 1006, rotate and adjust the lower pressure plate support nut, hold the lower pressure plate under the lower screw nut, lock the lower pressure plate 1006, support the center through-button top screw 1002, so that the split plugging seal shaft 801 does not sink, pull out the upper pressure plate 1004, align the octagonal gasket, valve flange and pipeline flange, install the flange bolts and tighten them; Step S700: Removing the tooling Rotate the upper screw nut to allow the center through screw 1002 to drive the split plugging seal shaft 801 and the silicone plate 804 to retreat to the lower part of the valve plate, close the valve, remove the valve plugging mounting frame 10, and the replacement is completed.

[0051] Furthermore, when installing the valve plugging mounting frame in step S400, only the lower pressing plate 1005 may be installed, and when the sealing plate 808 is moved above the lower pressing plate 1005, the upper pressing plate 1004 may be installed, thereby simplifying the operation steps; Furthermore, a replacement method for a line valve replacement tool is provided, which is used to improve the replacement of pipeline valves; the pipeline is provided with two valve controls, a short circuit connection is provided between the two valves, and the tool acts on the first valve.

[0052] Furthermore, the hole spacing and hole diameters of the positioning internal thread screw holes 806 of the sealing plate, the pipeline flange connection holes, and the valve flange connection holes are the same.

[0053] The present invention can reduce the loss of catalyst during the process of replacing the valve, by loosening the flange bolts, adjusting the octagonal gasket between the flanges, inserting the sealing plate (the spilled catalyst in this process is only the amount of catalyst stored in the octagonal gasket, which is collected in a plastic bag), installing the sealing plate connecting bolts, removing the first valve and the second valve for repair or replacing the new valve, connecting the valve sealing mounting frame, rotating the screw nut to allow the split plugging sealing shaft to enter the pipeline flange, removing the sealing plate, and more clearly inspecting and repairing the upper flange sealing surface, which can effectively prevent the sealing surface from leaking again due to defects that are not properly handled, installing the valve in a fully open state, pulling out the split plugging sealing shaft to under the valve plate, closing the valve and pulling out the split plugging sealing shaft (the spilled catalyst in this process is only the amount of catalyst stored between the upper plug of the sealing shaft and the valve plate).

[0054] It should be noted that the parts not described in detail in the present invention are prior art.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0060] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. Online valve replacement tooling, characterized in that: include: An octagonal pad shifting tool, which is installed on the octagonal pad of the valve flange, and is supported on the octagonal pad by a top screw, and is used to move the octagonal pad and adjust the gap between the octagonal pad and the valve flange and the pipeline flange; The split sealing plate is used to push out the octagonal gasket and is assembled in the gap between the valve flange and the pipeline flange. The split sealing plate is provided with a split plugging sealing shaft to plug the inner cavity of the pipeline flange. A valve plugging mounting frame is fixed on the pipeline, and the valve plugging mounting frame is connected to the split plugging sealing shaft through a center through-screw, so as to support the pipeline and the split plugging sealing shaft when the valve is removed.

2. The online valve replacement tool according to claim 1, characterized in that: The octagonal pad displacement tooling includes two semicircular fixing rings, the two semicircular fixing rings are provided with connecting plate ears, the connecting plate ears are threadedly connected with tooling connecting bolts, the two semicircular fixing rings are connected and fixed to the outside of the valve flange and the pipeline flange through the connecting plate ears and the tooling connecting bolts, the two fixing rings are provided with a plurality of radial internal threaded holes, the internal threaded holes are connected with the top screws, and a plurality of the top screws are supported on the octagonal pad.

3. The online valve replacement tool according to claim 1, characterized in that: The split sealing plate includes a sealing plate and a positioning arc plate arranged at one end of the sealing plate. The sealing plate is assembled in the gap between the valve flange opening and the pipeline flange opening, and the octagonal gasket is pushed out at the same time. An inwardly concave assembly groove is arranged in the middle of the sealing plate. The split plugging sealing shaft is movably assembled in the assembly groove. A through hole is formed at the bottom of the assembly groove for the center through screw to pass through. The split plugging sealing shaft can be axially separated from the sealing plate from the top of the assembly groove. A positioning internal thread screw hole for connecting the pipeline flange is arranged on the sealing plate; the positioning arc plate cooperates with the outer circumferential surface of the pipeline flange for positioning.

4. The online valve replacement tool according to claim 3, characterized in that: The split-type plugging sealing shaft is arranged into a conical structure, and a circular silicone plate is arranged at the bottom of the split-type plugging sealing shaft. The silicone plate is pressed by a pressure pad below the silicone plate and fixed by a pressure bolt. A connecting inner thread hole with a bottom opening is arranged in the split-type plugging sealing shaft, and a center hole corresponding to the connecting inner thread hole is formed on the silicone plate and the pressure pad. The connecting inner thread hole is used to connect the center through-screw, and a circumferential positioning mechanism fixed to the circumferential direction of the sealing plate is arranged on the side surface of the pressure pad; when the split-type plugging sealing shaft, the silicone plate and the pressure pad are connected to form a whole to seal the inner cavity of the pipeline flange port, the silicone plate and the inner cavity of the pipeline flange port have an interference fit.

5. The online valve replacement tool according to claim 3, characterized in that: The end surface of the sealing plate away from one end of the positioning arc plate is set as an arc surface, and the arc surface is in contact with the outer circumferential surface of the octagonal pad; four positioning internal thread screw holes are set on the sealing plate, which are respectively located at the four corners of the sealing plate, and the four positioning internal thread screw holes correspond one by one to four bolt holes of the pipeline flange; a circumferential positioning mechanism fixed to the circumferential direction of the sealing plate is set on the side surface of the pressure pad, and the circumferential positioning mechanism is a convex clamping block extending radially on the side surface of the pressure pad, and a positioning groove matched with the convex clamping block is set on the sealing plate, and the upper surface of the positioning groove is connected with the assembly groove.

6. The online valve replacement tool according to any one of claims 1 to 5, characterized in that: The valve plugging mounting frame also includes a pipe clamp tooling, a support screw, an upper pressure plate and a lower pressure plate. The pipe clamp tooling is fixed on the pipeline, the support screw is connected to the pipe clamp tooling, the center through-button screw is threadedly connected with a screw nut, rotating the screw nut drives the center through-button screw to move linearly, the support screw is threadedly connected with a pressure plate support nut, the upper pressure plate and the lower pressure plate are U-shaped pressure plates with open long holes, the upper pressure plate and the lower pressure plate are respectively assembled on the support screw and the center through-button screw through the open long holes, the pressure plate support nut locks the upper pressure plate and the lower pressure plate under the two screw nuts respectively, the upper pressure plate and the lower pressure plate provide support for the center through-button screw, and the disassembly and installation process of the center through-button screw passing through the valve is carried out by alternately removing the upper pressure plate and the lower pressure plate.

7. The online valve replacement tool according to claim 6, characterized in that: There are two supporting screws, which are respectively located on both sides of the center through-button screw. The center through-button screw and the two supporting screws are arranged side by side on the same plane. Two screw nuts are arranged on the center through-button screw, and two pressure plate support nuts are arranged on each supporting screw. The upper pressure plate and the lower pressure plate are locked from bottom to top to under the two screw nuts through the pressure plate support nuts on the support screws on both sides; the upper part of the center through-button screw is connected with a reinforcing spare cap for supporting the bottom of the split plugging seal shaft; the pipe clamp tooling includes two semicircular clamping rings, the two clamping rings are fixed to the outer wall of the pipeline and locked by clamping ring bolts, a support plate is fixed on the clamping ring, and a screw connecting through hole for connecting the support screw is arranged on the support plate.

8. A method for replacing an online valve replacement tool as described in any one of claims 1 to 7, characterized in that: The following steps are involved: Step S100: Install the octagonal pad shifting tool; there are a total of eight flange bolts between the valve flange and the pipeline flange, remove four of the flange bolts, loosen the remaining four flange bolts, install two semicircular ring fixing rings outside the valve flange and the pipeline flange, tighten the two tool connection bolts to make the two semicircular ring fixing rings form a whole, adjust the top screw on the shifting tool to be stuck on the octagonal pad, and move the tool to drive the octagonal pad to the middle position of the valve flange and the pipeline flange, so that the gap between the two flanges is greater than the thickness of the sealing plate, and remove the octagonal pad shifting tool; Step S200: Install the sealing plate; push the sealing plate between the valve flange and the pipeline flange, and at the same time, the sealing plate pushes the octagonal gasket out of the flange, and the positioning arc plate on the sealing plate is tightly fitted with the outer peripheral surface of the pipeline flange. At this time, the split plugging seal shaft is in the middle of the pipeline flange; connect the four positioning internal thread screw holes of the sealing plate and the four bolt holes left by removing the flange bolts of the pipeline flange through four sealing plate connecting bolts, so that the sealing plate and the pipeline flange form an integrated closed structure; Step S300: dismantle the valve; remove the remaining four flange bolts to separate the valve from the pipeline flange, and dismantle the lower valve; Step S400: Install the valve plugging mounting frame; fix the pipe clamp tooling on the outer wall of the pipeline, drive the split plugging seal shaft and the silicone plate into the pipeline flange for plugging through the center through-thread screw, install the upper pressure plate and the lower pressure plate under the two screw nuts respectively, and tighten them through two sets of pressure plate support nuts to fix the center through-thread screw; Step S500: remove the sealing plate; remove the four sealing plate connecting bolts, pull out the upper pressure plate, retract the sealing plate along the center through-thread screw to the upper part of the lower pressure plate, install the upper pressure plate, rotate and adjust the upper pressure plate support nut, hold the upper pressure plate under the upper screw nut, lock the upper pressure plate, support the center through-thread top screw, so that the split plugging sealing shaft does not sink, pull out the lower pressure plate, and remove the sealing plate; Step S600: Install the valve; clean the sealing surface of the pipeline flange for maintenance, put the octagonal gasket, the repaired valve or the new valve into the valve plugging mounting frame along the center through-button screw, install the lower pressure plate, rotate and adjust the lower pressure plate support nut, hold the lower pressure plate under the lower screw nut, lock the lower pressure plate, support the center through-button top screw, so that the split plugging seal shaft does not sink, pull out the upper pressure plate, align the octagonal gasket, valve flange and pipeline flange, and tighten the installation flange bolts; Step S700: Remove the tooling; rotate the upper screw nut to allow the center through screw to drive the split plugging seal shaft and the silicone plate to retreat to the lower part of the valve plate, close the valve, remove the valve plugging mounting frame, and the replacement is completed.

9. The method for replacing an online valve replacement tool according to claim 8, characterized in that; In step S100, remove the four flange bolts before and after the valve handle, and loosen the remaining four flange bolts on both sides with a gap of 5mm to see if the octagonal gasket is stuck in the upper and lower grooves of the flange mouth. After knocking it loose, install the octagonal gasket shifting tooling, continue to loosen the remaining four flange bolts until the gap between the two flanges is greater than the thickness of the sealing plate, keep the octagonal gasket in the middle position of the upper and lower flange mouths, rotate the octagonal gasket until the groove of the lower flange mouth is filled with catalyst, and remove the octagonal gasket shifting tooling; when installing the valve plugging mounting frame in step S400, only install the lower pressure plate, and when the sealing plate moves to the top of the lower pressure plate, install the upper pressure plate; in step S600, after cleaning and repairing the pipeline flange sealing surface, the replaced new valve or the repaired valve valve plate is in a fully open state.

10. The method for replacing an online valve replacement tool according to claim 8, characterized in that; Used to replace the valves on the lifting pipeline; there are two valve controls on the pipeline, and there is a short circuit connection between the two valves. When replacing the first valve, the tooling acts on the first valve. During the valve removal process in step S300, the first valve, the ground ring and the second valve under the sealing plate are all removed.

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