Flange skimming device

Abstract

The invention relates to the technical field of pipeline maintenance equipment, and particularly discloses a flange skimmer which comprises two hydraulic pushing parts and a hydraulic pump, each hydraulic pushing part comprises a guide rail, a separating part and a hydraulic jack, the two ends of each hydraulic jack are connected with the separating parts respectively, the separating parts are connected to the guide rails in a sliding mode, and the hydraulic pump is arranged on the guide rails. And the hydraulic pump is respectively connected with the hydraulic jacks of the two sets of hydraulic pushing components through hydraulic pipelines. The problem of clamping stagnation in the valve dismounting and mounting process of a skimmer is solved, the working efficiency of replacing the valve (or an ultrasonic flowmeter or a valve gasket) is improved, it is guaranteed that a flange sealing face is not damaged, and the working reliability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline maintenance equipment, in particular to a flange skimmer. Background Art

[0002] During the valve disassembly and replacement operation of the existing split-flange skimmer, the problem of difficulty in valve disassembly and installation is often encountered due to the skimmer getting stuck between the pipeline flange and the valve flange. The main reason is that when the existing flange skimmer expands the gap between the pipeline flanges, the separation gap between the pipeline flange and the valve flange is uneven, causing the valve to get stuck during disassembly and installation.

[0003] For example, the existing patent with publication number CN209466176U discloses a flange expander including a handle, a tightening screw, a tightening plate, a positioning bolt, a support plate, a top screw, an expansion block, a top bead and a cover plate. The cross-section of the lower end of the expansion block is an acute triangle, and the acute angle is inserted into the gap between the two flanges. The flange expansion process is: install the assembled flange expander on the bolt hole of the flange to be opened, turn the handle so that the top screw pushes the expansion block and slowly enters the gap between the two flanges, and slowly expands the two flanges. This process expands the gap between the two flanges through the triangular expansion block, and cannot ensure that the gap between the two flanges is uniform. In addition, during the gap expansion process, the expansion block will damage the sealing surface of the flange, affecting the sealing of the subsequent valve installation. Summary of the Invention

[0004] The purpose of the present invention is to provide a flange skimmer to solve the problem of the skimmer getting stuck during the valve disassembly and installation process, improve the work efficiency of valve (or ultrasonic flow meter or valve gasket) replacement, ensure that the flange sealing surface is not damaged, and improve work reliability.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A flange skimmer includes two sets of hydraulic pushing components and a hydraulic pump. The two sets of hydraulic pushing components each include a guide rail, a separator and a hydraulic jack. The two ends of the hydraulic jack are respectively connected to a separator, and the separator is slidably connected to the guide rail. The hydraulic pump is respectively connected to the hydraulic jacks of the two sets of hydraulic pushing components through hydraulic pipelines.

[0007] In a further solution, the guide rail includes a first column and a second column arranged parallel to each other, and push plates are provided at both ends of the hydraulic jack.

[0008] In a further scheme, the separating part includes a third guide ring, a fourth guide ring, a second connecting plate, a separating block and an adjusting bolt. One side of the third guide ring and one side of the fourth guide ring are connected by the second connecting plate. The third guide ring and the fourth guide ring are axially provided with a through hole matching the first column and the second column. The third guide ring slides on the first column and the fourth guide ring slides on the second column. There is a gap between the third guide ring and the fourth guide ring. A through hole is provided on the second connecting plate. A second nut is provided on the second connecting plate at the position of the through hole. The separating block is T-shaped, including a first flat plate and a second flat plate perpendicular to each other. One side of the first flat plate abuts against the push plate on the hydraulic jack. The second flat plate is provided with a third nut. The adjusting bolt is threadedly connected to the second nut. One end of the adjusting bolt passes through the through hole on the second connecting plate and is connected to the third nut.

[0009] In a further solution, a fixing member is further included, which is arranged on a side of the separating member away from the hydraulic jack and is slidably connected to the guide rail.

[0010] In a further solution, the fixing member and the separating member are adjustably connected.

[0011] In a further solution, the fixing member is connected to the middle portion of the adjacent side of the separating member by means of bolts.

[0012] In a further solution, the fixing member includes a fifth guide ring, a sixth guide ring, a third connecting plate, a longitudinal adjustment stud, a transverse adjustment stud and an adjustment nut. The bottom of the fifth guide ring and the top of the sixth guide ring are connected by the third connecting plate. The fifth guide ring and the sixth guide ring are axially provided with through holes matching the first column and the second column. The fifth guide ring slides on the first column and the sixth guide ring slides on the second column. A through hole is provided on the third connecting plate. The third connecting plate is provided with fourth nuts on both sides of the through hole. One end of the longitudinal adjustment stud passes through the through hole on the third connecting plate and is connected to the two fourth nuts. The other end of the longitudinal adjustment stud is threadedly connected to the side of the adjusting nut. The adjusting nut is also threadedly connected to one end of the transverse adjustment stud.

[0013] In a further solution, the hydraulic jack includes a telescopic cylinder with two ends extending in two directions.

[0014] In a further solution, a support member is further included, which is connected to the guide rail and is used to fix the middle part of the telescopic cylinder with both ends extending in two directions to the guide rail.

[0015] In a further solution, the support member includes a first guide ring, a second guide ring, a first connecting plate, a stud and a pressure plate. One side of the first guide ring and one side of the second guide ring are connected by the first connecting plate. The first guide ring and the second guide ring are axially provided with through holes matching the first column and the second column. The first guide ring is slidingly connected to the first column, and the second guide ring is slidingly connected to the second column. There is a gap between the first guide ring and the second guide ring. The bottom of the first guide ring and the top of the second guide ring are relatively provided with arc grooves. The other side of the first guide ring and the other side of the second guide ring are both provided with threaded holes. Through holes are provided at both ends of the pressure plate. One end of the two studs is connected to the threaded holes on the first guide ring and the second guide ring, and the other end passes through the through holes at both ends of the pressure plate and is connected to the first nut.

[0016] Beneficial effects of the present invention:

[0017] 1. When the flange separator of the present invention pushes the two flanges apart, the flanges on both sides are evenly stressed, so that the separation gap between the pipeline flange and the valve flange is even, thereby achieving the purpose of smoothly removing the valve.

[0018] 2. During the process of fixing and separating the flange, all structures of the present invention do not come into contact with the flange sealing surface, thus protecting the flange sealing surface from damage.

[0019] 3. The flange skimmer of the present invention can greatly reduce labor intensity, improve maintenance efficiency, and can quickly and efficiently complete valve replacement and maintenance tasks during a short stoppage.

[0020] 4. The flange skimmer of the present invention has a simple structure, low production cost, and a wide range of applications. It can cover the disassembly of valves in the entire pipeline, reduce costs, increase efficiency, and improve work efficiency.

[0021] 5. The flange skimmer of the present invention is small in size, light in weight, detachable and easy to carry. The small tool can solve the big problem of valve disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It shows a schematic structural diagram of a flange skimmer according to the present invention;

[0024] Figure 2 It shows a schematic structural diagram of a hydraulic jacking component according to the present invention;

[0025] Figure 3A schematic diagram of the support structure according to the present invention is shown;

[0026] Figure 4 It shows a schematic structural diagram of a separation member according to the present invention;

[0027] Figure 5 It shows a schematic structural diagram of a fixing member according to the present invention;

[0028] Figure 6 Shows a schematic diagram of a mounting support and a hydraulic jack according to the present invention;

[0029] Figure 7 It shows a schematic diagram of the installation separation member according to the present invention;

[0030] Figure 8 A schematic diagram showing the installation of the hydraulic jacking component according to the present invention is shown;

[0031] Figure 9 The figure shows the installation diagram of two sets of hydraulic jacking components and flanges according to the present invention.

[0032] In the figure: 1. Hydraulic pushing component; 2. Hydraulic pump; 3. Hydraulic pipeline; 4. Pipeline flange; 5. Guide rail; 6. Support member; 7. Separator; 8. Fixing member; 9. Hydraulic jack; 10. First guide ring; 12. Second guide ring; 13. First connecting plate; 14. Stud; 15. Pressure plate; 16. Arc groove; 17. Third guide ring; 18. Fourth guide ring; 19. Second connecting plate; 20. Separator; 21. Adjusting bolt; 22. Fifth guide ring; 23. Sixth guide ring; 24. Third connecting plate; 25. Longitudinal adjustment stud; 26. Transverse adjustment stud; 27. Adjusting nut; 501. First column; 502. Second column; 901. Push plate. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] like Figure 1 As shown, a flange skimmer includes two sets of hydraulic pushing components 1 and a hydraulic pump 2. The two sets of hydraulic pushing components 1 include guide rails 5, separators 7 and hydraulic jacks 9. The two ends of the hydraulic jack 9 are respectively connected with separators 7, and the separators 7 are slidably connected to the guide rails 5. The hydraulic pump 2 is respectively connected to the hydraulic jacks 9 of the two sets of hydraulic pushing components 1 through hydraulic pipes 3.

[0035] Its working principle or implementation method is that when carrying out valve disassembly operations, two sets of hydraulic pushing components 1 need to be used in conjunction, and one set of hydraulic pushing components 1 is installed on the left and right sides of the valve respectively and shares a hydraulic pump 2, to ensure that the hydraulic jacks 9 of the two sets of hydraulic pushing components 1 are lifted at the same time, and the pipeline flanges 4 on both sides are evenly stressed through the separation piece 7, so that the separation gap between the pipeline flange 4 and the valve flange is uniform, so as to achieve the purpose of smoothly removing the valve.

[0036] According to the above working principle or implementation method, some preferred implementation structures or implementation methods are provided, such as Figure 2 As shown, the flange skimmer may also include a support member 6, a separator 7 and a fixing member 8. The support member 6, the separator 7 and the fixing member 8 can slide on the guide rail 5. The support member 6 is used to support the guide rail 5 and fix the hydraulic jack 9. The hydraulic jack 9 is adjustably connected to the support member 6. Push plates 901 are provided at both ends of the hydraulic jack 9. Two separators 7 and two fixing members 8 are provided. The two separators 7 are respectively provided at both ends of the hydraulic jack 9. The first end of the first separator 7 abuts against the push plate 901 at the first end of the hydraulic jack 9. The first fixing member 8 is provided at the second end of the first separator 7. The first end of the second separator 7 abuts against the push plate 901 at the second end of the hydraulic jack 9. The second fixing member 8 is provided at the second end of the second separator 7.

[0037] When using a flange skimmer to disassemble and replace the valve, the first pipeline flange 4 is fixed by the first separating piece 7 and the first fixing piece 8, and the second pipeline flange 4 is fixed by the second separating piece 7 and the second fixing piece 8. The hydraulic jack 9 is driven by the hydraulic pump 2 to push the first pipeline flange 4 and the second pipeline flange 4 to separate. In the separation process, the separating piece 7 and the fixing piece 8 slide along the guide rail 5 to ensure that the gap between the first pipeline flange 4 and the second pipeline flange 4 is uniform, which facilitates the removal of the valve.

[0038] like Figure 2 As shown, for example, the guide rail 5 includes a first column 501 and a second column 502. For example, the first column 501 and the second column 502 can be made of two φ30 round steels and have a length of 1000 mm.

[0039] like Figure 3As shown, for example, the support member 6 includes a first guide ring 10, a second guide ring 12, a first connecting plate 13, a stud 14 and a pressure plate 15. One side of the first guide ring 10 and one side of the second guide ring 12 are connected by the first connecting plate 13. The first guide ring 10 and the second guide ring 12 are axially provided with through holes that match the first column 501 and the second column 502. The first guide ring 10 slides on the first column 501, and the second guide ring 12 slides on the second column 502. There is a gap between the first guide ring 10 and the second guide ring 12, and the bottom of the first guide ring 10 and the top of the second guide ring 12 are connected. Arc grooves 16 are arranged opposite to each other, and threaded holes are provided on the other side of the first guide ring 10 and the other side of the second guide ring 12. Through holes are provided at both ends of the pressure plate 15, and one end of the two studs 14 is connected to the threaded holes on the first guide ring 10 and the second guide ring 12, and the other end passes through the through holes at both ends of the pressure plate 15 and is connected to the first nut. Through the connection between the two first nuts and the studs 14, an adjustable connection between the pressure plate 15 and the first guide ring 10 and the second guide ring 12 is realized, thereby fixing the cylinder part of the hydraulic jack 9 in the arc groove 16 at the bottom of the first guide ring 10 and the top of the second guide ring 12.

[0040] like Figure 4 As shown, for example, the separator 7 includes a third guide ring 17, a fourth guide ring 18, a second connecting plate 19, a separating block 20 and an adjusting bolt 21. One side of the third guide ring 17 and one side of the fourth guide ring 18 are connected by the second connecting plate 19. The third guide ring 17 and the fourth guide ring 18 are axially provided with through holes that match the first column 501 and the second column 502. The third guide ring 17 slides on the first column 501, and the fourth guide ring 18 slides on the second column 502. There is a gap between them, a through hole is provided on the second connecting plate 19, and a second nut is provided on the second connecting plate 19 at the position of the through hole. The separation block 20 is T-shaped, including a first flat plate and a second flat plate perpendicular to each other, one side of the first flat plate abuts against the push plate 901 on the hydraulic jack 9, and a third nut is provided on the second flat plate. The adjusting bolt 21 is threadedly connected to the second nut, and one end of the adjusting bolt passes through the through hole on the second connecting plate 19 and is connected to the third nut. The separation block 20 is in contact with the pipeline flange 4 surface through the adjusting bolt 21.

[0041] By rotating the adjusting bolt 21, the separation block 20 is driven to move in a direction perpendicular to the hydraulic jack 9, so that it is suitable for pipeline flanges 4 of different models. Furthermore, the first plate and the second plate can move in the gap between the third guide ring 17 and the fourth guide ring 18, thereby expanding the range of movement of the separation block 20, thereby further expanding the scope of use of the flange skimmer.

[0042] like Figure 5As shown, for example, the fixing member 8 includes a fifth guide ring 22, a sixth guide ring 23, a third connecting plate 24, a longitudinal adjustment stud 25, a transverse adjustment stud 26, and an adjustment nut 27. The bottom of the fifth guide ring 22 and the top of the sixth guide ring 23 are connected by the third connecting plate 24. The fifth guide ring 22 and the sixth guide ring 23 are axially provided with through holes that match the first column 501 and the second column 502. The fifth guide ring 22 slides on the first column 501, and the sixth guide ring 23 slides on the second column 502. The third connecting plate 24 is provided with a through hole, and the third connecting plate 24 is provided with fourth nuts on both sides of the through hole. One end of the longitudinal adjustment stud 25 passes through the through hole in the third connecting plate 24 and is connected to two fourth nuts. The other end of the longitudinal adjustment stud 25 is threadedly connected to the side of the adjustment nut 27. The adjustment nut 27 is also threadedly connected to one end of the transverse adjustment stud 26. The upper end of the transverse adjustment stud 26 may have a head for tightening with a wrench.

[0043] The present invention uses a separator 7 and a fixing member 8 to fix pipeline flanges 4 of different types. Specifically, according to the size of the pipeline flange 4, the position of the separation block 20 is adjusted by adjusting the bolt 21, so that the other side of the first flat plate abuts against one side of the pipeline flange 4, and the bottom of the second flat plate abuts against the end face of the invention; by adjusting the position of the longitudinal adjustment stud 25, the longitudinal adjustment stud 25 is adjusted, and the transverse adjustment stud 26 is fixed in the bolt hole of the pipeline flange 4.

[0044] The method of using the flange skimmer of the present invention can be as follows:

[0045] S1, first assemble the first set of hydraulic jacking components 1, including the following steps:

[0046] S101、 Figure 6 As shown, install the support member 6 on the guide rail 5 and fix the hydraulic jack 9: insert the first column 501 and the second column 502 into the two through holes of the first guide ring 10 and the second guide ring 12 respectively, and fix the hydraulic jack 9 with the pressure plate 15, the stud 14 and the first nut. The quick interface of the hydraulic jack 9 faces outward to facilitate the installation of the hydraulic pump 2.

[0047] S102, such as Figure 7 As shown, the two separators 7 are installed on the guide rail 5: the third guide ring 17 and the fourth guide ring 18 of the two separators 7 are respectively mounted on the first column 501 and the second column 502, and the separation blocks 20 of the two separators 7 are respectively abutted against the push plates 901 on both sides of the hydraulic jack 9. The separation blocks 20 are adjusted to a suitable position by adjusting the adjusting bolts 21, and fit tightly against the 4 surfaces of the pipeline flange.

[0048] S103, such as Figure 8As shown, install the two fixings 8 onto the guide rail 5: Fit the fifth guide ring 22 and sixth guide ring 23 of the two fixings 8 onto the first column 501 and second column 502, respectively, symmetrically on the outside of the two separating pieces 7. Adjust the longitudinal adjustment studs 25 according to the size of the pipeline flange 4. Insert the transverse adjustment studs 26 into the flange holes from which the bolts of the pipeline flange 4 were previously removed and tighten.

[0049] S2. Complete the assembly of the second set of hydraulic jacking components 1 according to steps S101-S103.

[0050] S3, such as Figure 9 As shown, the first set of hydraulic jacking components 1 and the second set of hydraulic jacking components 1 are fixed to both sides of the two pipeline flanges 4 respectively.

[0051] S4. Connect two hydraulic jacks 9 to the same hydraulic pump 2 through hydraulic pipe quick connectors. When pressing the hydraulic pump 2, it can ensure that the force on both sides of the pipeline flange 4 is even.

[0052] The present invention performs the fixing and separation process on the pipeline flange 4, and all structures do not contact the sealing surface of the flange 4, thereby protecting the sealing surface of the pipeline flange 4 from damage.

[0053] The working principle of the flange skimmer is as follows:

[0054] 1. Determine the approximate position of the fixing member 8 based on the distance between the two pipeline flanges 4 on site. Adjust the horizontal and vertical positions by adjusting the longitudinal adjustment studs 25 and transverse adjustment studs 26. Insert the transverse adjustment studs 26 into the screw holes where the bolts of the pipeline flange 4 have been removed in advance. Fix a set of hydraulic jacking components 1 at 90° and 180° on both sides of the pipeline.

[0055] 2. The maximum lifting capacity of the selected split hydraulic jack 9 is 10 tons. Depending on the size of the pipeline flange 4 and the valve (flowmeter) to be removed, the hydraulic jack 9 can be replaced with a suitable height and stroke to adjust the spacing between the separation blocks 20 and meet the requirements for disassembly of all valves (flowmeters) within the station. This is suitable for valves larger than DN219 and up to DN1016, as well as for flowmeter verification and disassembly.

[0056] 3. After connecting the two sets of hydraulic pushing components 1 to the same hydraulic pump 2, press the hydraulic pump 2 evenly and slowly to ensure that the stroke of the hydraulic jack 9 is basically the same. The push plates 901 at both ends of the hydraulic jack 9 push the separator 7 to slide on the guide rail 5. After there is enough disassembly clearance between the pipeline flange surface and the valve flange surface, the valve can be removed through the hand hoist above the valve.

[0057] The above-mentioned hydraulic jack 9 can also be a telescopic cylinder including two-way extensions at both ends, and the above-mentioned support 6 is used to achieve a fixed connection with the guide rail 5. The above-mentioned fixing part 8 and the separator 7 are adjustably connected, and the distance between the fixing part 8 and the separator 7 is adjusted to adapt to the width of the pipeline flange 4, thereby further improving the supporting strength of the hydraulic jack 9 and the supporting strength at the separator 7, so that both sides of the pipeline flange 4 are subjected to force.

[0058] It should be noted that the terms "first", "second" etc. in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the application described herein. In this application, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "center", "vertical", "horizontal", "lateral", "longitudinal" etc. are based on the directions or positional relationships shown in the accompanying drawings.

[0059] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0060] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A flange skimmer, characterized in that: The invention comprises two sets of hydraulic pushing components (1) and a hydraulic pump (2). The two sets of hydraulic pushing components (1) each comprise a guide rail (5), a separator (7) and a hydraulic jack (9). The two ends of the hydraulic jack (9) are respectively connected to the separator (7). The separator (7) is slidably connected to the guide rail (5). The hydraulic pump (2) is respectively connected to the hydraulic jack (9) of the two sets of hydraulic pushing components (1) through a hydraulic pipeline (3).

2. A flange skimmer according to claim 1, characterized in that: The guide rail (5) comprises a first column (501) and a second column (502) arranged parallel to each other, and push plates (901) are provided at both ends of the hydraulic jack (9).

3. A flange skimmer according to claim 2, characterized in that: The separating member (7) comprises a third guide ring (17), a fourth guide ring (18), a second connecting plate (19), a separating block (20) and an adjusting bolt (21); one side of the third guide ring (17) and one side of the fourth guide ring (18) are connected via the second connecting plate (19); the third guide ring (17) and the fourth guide ring (18) are provided with through holes matching the first column (501) and the second column (502) along the axial direction; the third guide ring (17) slides on the first column (501) and the fourth guide ring (18) slides on the second column (502); The hydraulic jack (9) is movable, and there is a gap between the third guide ring (17) and the fourth guide ring (18). A through hole is provided on the second connecting plate (19), and a second nut is provided at the position of the through hole. The separation block (20) is T-shaped and includes a first flat plate and a second flat plate perpendicular to each other. One side of the first flat plate abuts against the push plate (901) on the hydraulic jack (9), and a third nut is provided on the second flat plate. The adjusting bolt (21) is threadedly connected to the second nut, and one end of the adjusting bolt (21) passes through the through hole on the second connecting plate (19) and is connected to the third nut.

4. A flange skimmer according to claim 2, characterized in that: It also includes a fixing member (8), which is arranged on a side of the separating member (7) away from the hydraulic jack (9) and is slidably connected to the guide rail (5).

5. A flange skimmer according to claim 4, characterized in that: The fixing member (8) is adjustably connected to the separating member (7).

6. A flange skimmer according to claim 5, characterized in that: The fixing member (8) is connected to the middle portion of the adjacent side of the separating member (7) by means of bolts.

7. A flange skimmer according to claim 4, characterized in that: The fixing member (8) comprises a fifth guide ring (22), a sixth guide ring (23), a third connecting plate (24), a longitudinal adjustment stud (25), a transverse adjustment stud (26) and an adjustment nut (27); the bottom of the fifth guide ring (22) and the top of the sixth guide ring (23) are connected via the third connecting plate (24); the fifth guide ring (22) and the sixth guide ring (23) are provided with through holes matching the first column (501) and the second column (502) along the axial direction; the fifth guide ring (22) is provided on the first column (501) slides on the sixth guide ring (23) slides on the second column (502), a through hole is provided on the third connecting plate (24), and fourth nuts are provided on both sides of the through hole of the third connecting plate (24), one end of the longitudinal adjustment stud (25) passes through the through hole on the third connecting plate (24) and is connected to the two fourth nuts, the other end of the longitudinal adjustment stud (25) is threadedly connected to the side of the adjustment nut (27), and the adjustment nut (27) is also threadedly connected to one end of the transverse adjustment stud (26).

8. A flange skimmer according to claim 2, characterized in that: The hydraulic jack (9) comprises a telescopic cylinder with two ends extending in two directions.

9. A flange skimmer according to claim 8, characterized in that: It also includes a support member (6), which is connected to the guide rail (5) and is used to fix the middle part of the telescopic cylinder with both ends extending in both directions to the guide rail (5).

10. A flange skimmer according to claim 9, characterized in that: The support member (6) comprises a first guide ring (10), a second guide ring (12), a first connecting plate (13), a stud (14) and a pressure plate (15); one side of the first guide ring (10) and one side of the second guide ring (12) are connected via the first connecting plate (13); the first guide ring (10) and the second guide ring (12) are provided with through holes matching the first column (501) and the second column (502) along the axial direction; the first guide ring (10) is slidably connected to the first column (501); the second guide ring (12) is slidably connected to the second column (502) Sliding connection, there is a gap between the first guide ring (10) and the second guide ring (12), the bottom of the first guide ring (10) and the top of the second guide ring (12) are relatively provided with arc grooves (16), the other side of the first guide ring (10) and the other side of the second guide ring (12) are provided with threaded holes, and through holes are provided at both ends of the pressure plate (15), one end of the two studs (14) is connected to the threaded holes on the first guide ring (10) and the second guide ring (12), and the other end passes through the through holes at both ends of the pressure plate (15) and is connected to the first nut.

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