Adjustable repair device for variable cross-section lumen inserts

Abstract

The application provides a variable cross-section pipe cavity block adjusting and repairing device, which comprises a profile inspection template 1, an upper block 2, a lower block 3, locking screws 4 and a bent handle bolt 5, wherein the profile inspection template 1 is a plate structure, the upper and lower surfaces of which are mirror-symmetrical, and the upper and lower surfaces are respectively provided with a reinforcing rib 1-1 corresponding to the sealing area of the inner cavity of a girder, a hole 1-2 corresponding to the hole position of a girder pile hole is arranged in the middle of the template, and the side surface is rod-shaped; the upper and lower surfaces are respectively consistent with the theoretical shape of the sealing area of the inner cavity of the girder; the upper block 2 is a hollow block structure, and the inner cavity of the upper block 2 is provided with a sharp rod-shaped boss 2-1; three stepped through holes 2-2 are arranged on the upper surface, the large-diameter section of the stepped through hole 2-2 faces the upper surface, and the small-diameter section faces the lower surface; two through holes 2-3 are arranged on the outer end vertical surface of the upper block 2, the nominal diameter of the through hole 2-3 is consistent with the outer end two holes of the variable cross-section pipe cavity block; two through holes 2-4 are arranged on the inner end vertical surface of the upper block 2, and the nominal diameter of the through hole 2-4 is consistent with the inner end two holes of the variable cross-section pipe cavity block.

Description

Technical Field

[0001] This application relates to the field of adhesive sealing, and more specifically to an adjustable fitting device for a variable cross-section pipe liner. Background Technology

[0002] As attached Figure 1 As shown, the main rotor blade (hereinafter referred to as "main rotor blade") of a certain series of aircraft uses a tubular aluminum alloy beam (hereinafter referred to as "beam") as the main load-bearing component. The root of the main rotor blade is connected to the main rotor hub by a steel flange end face joint. The joint is connected to the beam by bolts and nuts.

[0003] As attached Figure 2 As shown, to prevent the main beam from deforming under bolt tightening pressure, a variable cross-section tubular cavity liner is installed in the bolt connection area of ​​the main beam's inner cavity to support the bolt tightening pressure on the main beam. Therefore, the variable cross-section tubular cavity liner is required to fit tightly with the inner cavity surface of the main beam to reduce the amount of deformation of the main beam under bolt tightening force.

[0004] As attached Figure 3 As shown, the boundary between the variable cross-section tube liner and the inner cavity of the main beam is coated with sealant to achieve a sealing effect, so as to prevent the nitrogen gas filled in the inner cavity of the main beam from leaking out, thereby maintaining a certain air pressure in the inner cavity of the main beam, and finally realizing the function of using a pressure signal device to monitor the generation of through cracks in the main beam.

[0005] As attached Figure 4 As shown, because the main beam is formed by extrusion, the cross-sectional dimensions of the inner cavity vary to some extent. Therefore, the surface area of ​​the variable cross-section cavity liner block that matches it needs to have a margin. Consequently, before assembling the variable cross-section cavity liner block, the surface of the variable cross-section cavity liner block needs to be manually filed to remove the excess material.

[0006] When using existing technology, due to the lack of a repair benchmark, it is only possible to rely on visual inspection and compare the variable cross-section tubular cavity liner with the inner cavity of the main beam before repair. Because the inner cavity of the main beam is small, it is impossible to observe the overall fit between the variable cross-section tubular cavity liner and the inner cavity of the main beam, which leads to inconsistent gaps between the variable cross-section tubular cavity liner and the inner cavity of the main beam, and excessive filing in some areas, resulting in excessively large gaps. Summary of the Invention

[0007] This application provides an adjustable fitting device for a variable cross-section tubular cavity liner, which solves the problem of inconsistent clearance between the variable cross-section tubular cavity liner and the inner cavity of the main beam.

[0008] Technical solution: An adjustment and fitting device for a variable cross-section pipe liner, comprising a profile inspection template 1, an upper molded block 2, a lower molded block 3, a locking screw 4, and a bent shank pin 5, wherein:

[0009] The profile inspection sample plate 1 is a plate-shaped structure, the upper and lower surfaces are mirror images, the middle of the upper and lower surfaces respectively correspond to the sealing area of the beam inner cavity, and a reinforcing rib 1-1 is arranged, the middle of the sample plate corresponds to the beam stud hole position, and six holes 1-2 are opened, and the side surface is rod-shaped; the upper and lower surfaces are respectively consistent with the theoretical shape of the sealing area of the beam inner cavity;

[0010] The upper mold block 2 is a hollow block structure, the inner cavity of the upper mold block 2 has a sharp rod-shaped boss 2-1; three stepped through holes 2-2 are opened on the upper surface, the large diameter section of the stepped through hole 2-2 faces the upper surface, and the small diameter section faces the lower surface; two through holes 2-3 are opened on the outer end vertical surface of the upper mold block 2, the nominal diameter of the through hole 2-3 is consistent with the outer end 2 hole of the variable cross-section pipe cavity lining block; two through holes 2-4 are opened on the inner end vertical surface of the upper mold block 2, the nominal diameter of the through hole 2-4 is consistent with the inner end 2 hole of the variable cross-section pipe cavity lining block; two crack arrest holes 2-5 are opened at the root of the sharp rod-shaped boss 2-1 in the inner cavity of the upper mold block 2; the upper surface of the upper mold block 2 is a curved surface, and a corresponding shape groove 2-6 is opened in the middle of the upper surface corresponding to the beam inner cavity reinforcing rib; the lower surface of the upper mold block 2 is a plane;

[0011] The lower mold block 3 is a hollow block structure, the inner cavity of the lower mold block 3 has a sharp rod-shaped boss 3-1; three threaded through holes 3-2 are opened; two through holes 3-3 are opened on the outer end vertical surface of the lower mold block 3, the nominal diameter of the through hole 3-3 is consistent with the outer end 2 hole of the variable cross-section pipe cavity lining block; two through holes 3-4 are opened on the inner end vertical surface of the lower mold block 3, the nominal diameter of the through hole 3-4 is consistent with the inner end 2 hole of the variable cross-section pipe cavity lining block; two crack arrest holes 3-5 are opened at the root of the sharp rod-shaped boss 3-1 in the inner cavity of the lower mold block 3; the lower surface of the lower mold block 3 is a curved surface, and a corresponding shape groove 3-6 is opened in the middle of the lower surface corresponding to the beam inner cavity reinforcing rib; the upper surface of the lower mold block 3 is a plane;

[0012] The locking screw 4 passes through the upper mold block 2 and is screwed into the threaded hole opened in the lower mold block 3.

[0013] Specifically, the plane of the upper mold block 2 and the lower mold block 3 is combined, the three stepped holes 2-2 opened on the upper mold block 2 are aligned with the three threaded holes 3-2 opened on the lower mold block 3 to form a mold block assembly; at the same time, the inner cavities of the upper mold block 2 and the lower mold block 3 are combined to form a mold block inner cavity for placing a variable cross-section pipe cavity lining block; a plug gauge is inserted into the gap formed between the combined surfaces of the upper mold block 2 and the lower mold block 3.

[0014] Specifically, the four vertical surfaces of the profile inspection sample plate 1 are consistent in shape with the four outer vertical surfaces of the upper mold block 2 and the lower mold block 3, the upper surface of the profile inspection sample plate 1 cooperates with the upper surface of the upper mold block 2; the lower surface of the profile inspection sample plate 1 cooperates with the lower surface of the lower mold block 3; after the profile cooperation, the profile inspection sample plate 1 slides along the extension direction of the reinforcing rib 1-1.

[0015] Specifically, the upper block 2 and the lower block 3 are aligned around the vertical surface, and the lower surface of the lower block 3 is matched with the reinforcing rib in the cavity of the girder to ensure the placement direction of the upper block 2 and the lower block 3. During the process of pushing the upper block 2 and the lower block 3 into the cavity of the girder, the placement direction is kept the same as the placement direction of the variable cross-section pipe cavity block, and the upper block 2 and the lower block 3 are placed in the sealing position of the variable cross-section pipe cavity block as needed.

[0016] Specifically, after the upper block 2 and the lower block 3 are placed in the sealing position, a steel sheet is inserted into the gap between the upper block 2 and the lower block 3, until the upper surface of the upper block 2 is matched with the profile of the cavity of the girder, and a steel sheet with a larger total thickness cannot be inserted, and the total thickness of the steel sheet is measured.

[0017] Specifically, the upper block 2 and the lower block 3 are taken out of the cavity of the girder, and the vertical surface around them is aligned. The inner cavity of the upper block 2 and the inner cavity of the lower block 3 are combined to form a block inner cavity, and the variable cross-section pipe cavity block is placed in the block inner cavity. During the placement process, when the two through holes 2-3 in the outer end vertical surface of the upper block 2 are aligned with the upper two holes in the outer end of the variable cross-section pipe cavity block, or the two through holes 3-3 in the outer end vertical surface of the lower block 3 are aligned with the lower two holes in the outer end of the variable cross-section pipe cavity block, the bent handle latch 5 is inserted into the two through holes 2-3 in the outer end vertical surface of the upper block 2 and the upper two holes in the outer end of the variable cross-section pipe cavity block, or the two through holes 3-3 in the outer end vertical surface of the lower block 3 and the lower two holes in the outer end of the variable cross-section pipe cavity block. At the same time, the bent handle latch 5 is inserted into the two through holes 2-4 in the inner end vertical surface of the upper block 2 and the upper two holes in the inner end of the variable cross-section pipe cavity block, or the two through holes 3-4 in the inner end vertical surface of the lower block 3 and the lower two holes in the inner end of the variable cross-section pipe cavity block, to determine the relative position of the variable cross-section pipe cavity block and the upper block 2 or the lower block 3.

[0018] Specifically, the locking screw 4 is inserted through the three stepped through holes 2-2 in the upper block 2 and the three threaded holes 3-2 in the lower block 3 to ensure the relative position of the upper block 2 and the lower block 3 in their combined plane. The locking screw 4 is tightened to lock the upper block 2 and the lower block 3, and at the same time, the steel sheet inserted in the gap between the combined plane of the upper block 2 and the lower block 3 is clamped.

[0019] Specifically, the profile inspection sample 1 slides along the reinforcing rib, and the surface of the profile inspection sample 1 is observed from the sample perimeter surface to determine whether there is a gap between the surface of the profile inspection sample 1 and the surface of the variable cross-section pipe cavity block, or whether there is a local contact between the surface of the profile inspection sample 1 and the surface of the variable cross-section pipe cavity block, which causes the profile inspection sample 1 to be unable to be matched with the upper surface of the upper block 2.

[0020] In summary, the adjustable repairing device for the variable cross-section pipe cavity block provided by the application is simple to operate, can repair the profile of the variable cross-section pipe cavity block in place at one time, avoids repeatedly comparing the variable cross-section pipe cavity block in the inner cavity of the girder, greatly improves the matching precision of the upper and lower profiles of the variable cross-section pipe cavity block and the inner cavity of the girder, improves the sealing effect and the uniformity of the support force distribution of the variable cross-section pipe cavity block on the inner cavity of the girder, and avoids excessive local pressure of the girder. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of a blade root structure;

[0022] Figure 2 is a schematic view of assembly of the variable cross-section pipe cavity block;

[0023] Figure 3 is a schematic view of the peripheral sealing structure of the variable cross-section pipe cavity block;

[0024] Figure 4 is a schematic view of repairing of the variable cross-section pipe cavity block and the girder;

[0025] Figure 5 is a structural view of the adjustable repairing device for the variable cross-section pipe cavity block provided by the application;

[0026] Figure 6 is a schematic view of the profile inspection sample plate provided by the application;

[0027] Figure 7 is a schematic view of the upper profile block provided by the application;

[0028] Figure 8 is a schematic view of the lower profile block provided by the application;

[0029] Figure 9 is a schematic view of the upper profile block and the lower profile block being put into the inner cavity of the girder provided by the application;

[0030] Figure 10 is a schematic view of the upper profile block and the lower profile block being closed and the plug gauge being inserted provided by the application;

[0031] Figure 11 is a schematic view of the variable cross-section pipe cavity block being put in and repaired provided by the application;

[0032] Figure 12 is a schematic view of the profile inspection of the variable cross-section pipe cavity block provided by the application;

[0033] Wherein: 1-profile inspection sample plate, 2-upper profile block, 3-lower profile block, 4-locking screw, 5-bent handle latch. DETAILED DESCRIPTION

[0034] The patent is a variable cross-section lumen block repairing device and method, which is applied to the field of adhesive sealing and can meet the appearance repairing requirements of variable cross-section lumen blocks within a certain size range, so as to realize the precise cooperation of the variable cross-section lumen block and the lumen and improve the adhesive sealing effect of the variable cross-section lumen block and the inner wall of the lumen.

[0035] Embodiment one

[0036] As shown in Figure 5 , the application provides an adjustable repairing device for a variable cross-section lumen block, which comprises a profile inspection template 1, an upper mold block 2, a lower mold block 3, locking screws 4, and a bent handle bolt 5, wherein:

[0037] As shown in Figure 6 , the profile inspection template 1 is a plate structure made of aluminum, and the upper and lower surfaces are mirror-symmetric, and the upper and lower surfaces are provided with reinforcing ribs 1-1 corresponding to the sealing area of the beam inner cavity, and a hole 1-2 is arranged in the middle of the template corresponding to the beam stud hole, and the side surface is rod-shaped Figure 5 , and the upper and lower surfaces are consistent with the theoretical shape of the sealing area of the beam inner cavity.

[0038] As shown in Figure 7 , the upper mold block 2 is a hollow block structure made of steel and has great hardness and strong wear resistance. The inner cavity of the upper mold block 2 has a sharp rod-shaped boss 2-1, three stepped through holes 2-2 are arranged on the upper surface, the large-diameter section of the stepped through hole 2-2 faces the upper surface, and the small-diameter section faces the lower surface, two through holes 2-3 are arranged on the outer end vertical surface of the upper mold block 2, the nominal diameter of the through hole 2-3 is consistent with the two holes at the outer end of the variable cross-section lumen block, two through holes 2-4 are arranged on the inner end vertical surface of the upper mold block 2, the nominal diameter of the through hole 2-4 is consistent with the two holes at the inner end of the variable cross-section lumen block, two crack arrest holes 2-5 are arranged at the root of the sharp rod-shaped boss 2-1 in the inner cavity of the upper mold block 2, the upper surface of the upper mold block 2 is curved, and a corresponding shape groove 2-6 is arranged on the middle part of the upper surface corresponding to the reinforcing rib of the beam inner cavity, and the lower surface of the upper mold block 2 is flat.

[0039] As shown in Figure 8 , the lower mold block 3 is a hollow block structure made of steel and has great hardness and strong wear resistance. The inner cavity of the lower mold block 3 has a sharp rod-shaped boss 3-1, three threaded through holes 3-2 are arranged, two through holes 3-3 are arranged on the outer end vertical surface of the lower mold block 3, the nominal diameter of the through hole 3-3 is consistent with the two holes at the outer end of the variable cross-section lumen block, two through holes 3-4 are arranged on the inner end vertical surface of the lower mold block 3, the nominal diameter of the through hole 3-4 is consistent with the two holes at the inner end of the variable cross-section lumen block, two crack arrest holes 3-5 are arranged at the root of the sharp rod-shaped boss 3-1 in the inner cavity of the lower mold block 3, the lower surface of the lower mold block 3 is curved, a corresponding shape groove 3-6 is arranged on the middle part of the lower surface corresponding to the reinforcing rib of the beam inner cavity, and the upper surface of the lower mold block 3 is flat.

[0040] As shown in Figure 10As shown, the upper mold block 2 and the lower mold block 3 are plane-fitted, three stepped holes 2-2 on the upper mold block 2 are aligned with three threaded holes 3-2 on the lower mold block 3 to form a mold block assembly; at the same time, the inner cavities of the upper mold block 2 and the lower mold block 3 are combined to form a mold block inner cavity for placing a variable cross-section pipe cavity liner; a plug gauge can be inserted into the gap formed by the plane-fitting of the upper mold block 2 and the lower mold block 3;

[0041] The profile inspection template 1 is used during repair inspection and can be attached to the upper surface of the upper mold block 2 or the lower surface of the lower mold block 3;

[0042] The locking screw 4 can pass through the upper mold block 2 and be screwed into the threaded hole on the lower mold block 3;

[0043] Specifically, as shown in the figure, Figure 12 The four peripheral vertical surfaces of the profile inspection template 1 are consistent with the outer shapes of the four peripheral vertical surfaces of the upper mold block 2 and the lower mold block 3, the upper surface of the profile inspection template 1 can be matched with the upper surface of the upper mold block 2, and the lower surface of the profile inspection template 1 can be matched with the lower surface of the lower mold block 3; after the profile matching, the profile inspection template 1 can slide along the extension direction of the reinforcing rib 1-1.

[0044] Specifically, as shown in the figure, Figure 9 The four peripheral vertical surfaces of the upper mold block 2 and the lower mold block 3 can be aligned, and the middle groove 3-6 on the lower surface of the lower mold block 3 can be matched with the reinforcing rib in the girder inner cavity to ensure the placement direction of the upper mold block 2 and the lower mold block 3; during the pushing of the upper mold block 2 and the lower mold block 3 into the girder inner cavity, the placement direction of the upper mold block 2 and the lower mold block 3 can always be kept the same as the placement direction of the variable cross-section pipe cavity liner, and the upper mold block 2 and the lower mold block 3 can be placed at the sealing position of the variable cross-section pipe cavity liner as needed.

[0045] Specifically, as shown in the figure, Figure 10 After the upper mold block 2 and the lower mold block 3 are placed at the sealing position, a plug gauge steel sheet with an appropriate thickness can be inserted into the gap between the plane-fitted upper mold block 2 and lower mold block 3 until the upper surface of the upper mold block 2 is attached to the profile of the girder inner cavity, and a plug gauge steel sheet with a larger total thickness cannot be inserted; at this time, the total thickness of the plug gauge steel sheet is measured and recorded.

[0046] Specifically, as shown in the figure, Figure 11As shown, the upper mold block 2 and the lower mold block 3 are taken out of the girder inner cavity, the peripheral vertical surface can be aligned, the inner cavity of the upper mold block 2 and the inner cavity of the lower mold block 3 are combined to form a mold block inner cavity, and the variable cross-section tube cavity lining block can be put into the lining block inner cavity. During the putting process, when the two through holes 2-3 on the outer end vertical surface of the upper mold block 2 are aligned with the upper two holes on the outer end of the variable cross-section tube cavity lining block, or the two through holes 3-3 on the outer end vertical surface of the lower mold block 3 are aligned with the lower two holes on the outer end of the variable cross-section tube cavity lining block, the bent handle latch 5 can be inserted into the two through holes 2-3 on the outer end vertical surface of the upper mold block 2 and the upper two holes on the outer end of the variable cross-section tube cavity lining block or the two through holes 3-3 on the outer end vertical surface of the lower mold block 3 and the lower two holes on the outer end of the variable cross-section tube cavity lining block. At the same time, the bent handle latch 5 can be inserted into the two through holes 2-4 on the inner end vertical surface of the upper mold block 2 and the upper two holes on the inner end of the variable cross-section tube cavity lining block or the two through holes 3-4 on the inner end vertical surface of the lower mold block 3 and the lower two holes on the inner end of the variable cross-section tube cavity lining block, so as to determine the relative position of the variable cross-section tube cavity lining block and the upper mold block 2 or the lower mold block 3.

[0047] Specifically, as shown in Figure 11 After the recorded total thickness of the plug gauge is inserted into the gap between the planes of the upper mold block 2 and the lower mold block 3, it can be ensured that the distance between the planes of the upper mold block 2 and the lower mold block 3 is consistent when they are in the girder inner cavity.

[0048] Specifically, as shown in Figure 11 The insertion of the locking screw 4 through the three stepped through holes 2-2 in the upper mold block 2 and the three threaded through holes 3-2 in the lower mold block 3 can ensure the relative position of the upper mold block 2 and the lower mold block 3 in the plane of their combination. Tightening the locking screw 4 can lock the upper mold block 2 and the lower mold block 3, and at the same time, clamp the inserted plug gauge steel sheet in the gap between the combination planes of the upper mold block 2 and the lower mold block 3.

[0049] Specifically, as shown in Figure 12 The profile inspection template 1 can slide along the reinforcing rib, and from the template peripheral surface, it can be observed whether there is a gap between the surface of the profile inspection template 1 and the surface of the variable cross-section tube cavity lining block or whether there is local contact between the surface of the profile inspection template 1 and the surface of the variable cross-section tube cavity lining block, which causes the profile inspection template 1 to be unable to adhere to the upper surface of the upper mold block 2. If it exists, it indicates that there is interference, and at this time, the contact area needs to be repaired to eliminate the interference.

[0050] Example Two

[0051] The present application provides an adjustable repair method for a variable cross-section tube cavity lining block, which is realized by using the adjustable repair device for the variable cross-section tube cavity lining block provided in the above-mentioned embodiments of the present application. The method comprises:

[0052] Step 1: Put in the mold block: align the reinforcing rib in the girder inner cavity with the groove opened on the upper mold block 2 and the lower mold block 3, and then push the mold block along the reinforcing rib into the variable cross-section tube cavity lining block installation position in the girder inner cavity as shown in Figure 9 ;

[0053] Step 2: Insert the gage: align the upper mold block 2, the lower mold block 3 and the four sides of the mold block, insert the gage into the gap between the upper mold block 2 and the lower mold block 3, until the upper mold block 2 and the lower mold block 3 are respectively attached to the inner cavity of the girder, and record the total thickness of the inserted gage steel sheet as shown in Figure 10 ;

[0054] Step 3: Mold block assembly: remove the mold block and the gage from the inner cavity of the girder, insert the gage steel sheet with the thickness described in step 2 into the gap between the upper mold block 2 and the lower mold block 3 at the four corners, and tighten the locking screw as shown in Figure 11 ;

[0055] Step 4: Assembly of variable cross-section pipe cavity lining block: place the variable cross-section pipe cavity lining block to be repaired into the inner cavity formed by the upper mold block 2 and the lower mold block 3, and insert the bent handle latch 5 so that the latch is inserted into the upper end vertical hole 2-3 of the upper mold block 2 or the lower end vertical hole 3-3 of the lower mold block 3 as shown in Figure 11 ;

[0056] Step 5: Repair of variable cross-section pipe cavity lining block: based on the surface of the upper mold block 2 and the lower mold block 3 as the reference, polish and file the profile of the variable cross-section pipe cavity lining block to remove the excess as shown in Figure 11 ;

[0057] Step 6: Profile detection: attach the profile detection template 1 to the corresponding surface of the upper mold block 2 and the lower mold block 3, and observe the gap between the upper surface of the profile detection template 1 and the upper surface of the variable cross-section pipe cavity lining block from the outer end surface of the template, or whether the surface of the profile detection template 1 is in contact with the surface of the variable cross-section pipe cavity lining block, causing the profile detection template 1 to be unable to attach to the upper surface of the upper mold block 2 or the lower surface of the lower mold block 3. If there is, it indicates that there is interference, which needs to be repaired in the contact area to eliminate the interference. If Figure 12 .

[0058] Step 7: Repeat steps 5 and 6 until all interferences between the profile detection template 1 and the upper surface of the upper mold block 2 or the lower surface of the lower mold block 3 are eliminated.

[0059] In summary, the adjustable repair device for variable cross-section pipe cavity lining block provided by the present application is simple to operate, can repair the profile of the variable cross-section pipe cavity lining block in place at one time, avoids repeatedly comparing the variable cross-section pipe cavity lining block in the inner cavity of the girder, greatly improves the fitting accuracy of the upper and lower profiles of the variable cross-section pipe cavity lining block and the inner cavity of the girder, improves the sealing effect and the uniformity of the support force distribution of the variable cross-section pipe cavity lining block on the inner cavity of the girder, and avoids excessive local pressure on the girder. The adjustable repair device for variable cross-section pipe cavity lining block provided by the present application meets the repair requirements of variable cross-section pipe cavity lining blocks within a certain size range, greatly reduces the gap between the profile of the variable cross-section pipe cavity lining block and the pipe cavity, and realizes one-time repair according to the size of the inner cavity of the girder.

Claims

1. A device for adjusting and fitting a variable cross-section pipe liner, characterized in that, Includes a surface inspection template (1), an upper mold block (2), a lower mold block (3), a locking screw (4), and a bent shank pin (5), wherein: The template (1) for surface inspection is a plate-shaped structure with mirror symmetry on its upper and lower surfaces. The middle part of the upper and lower surfaces corresponds to the sealing area of ​​the inner cavity of the main beam and is equipped with reinforcing ribs (1-1). The middle part of the template corresponds to the bolt hole position of the main beam and has 6 holes (1-2). Its side is rod-shaped. The upper and lower surfaces are consistent with the theoretical shape of the sealing area of ​​the inner cavity of the main beam. The upper block (2) is a hollow block structure. The inner cavity of the upper block (2) has a first pointed rod-shaped boss (2-1). Three stepped through holes (2-2) are opened from the upper surface. The large diameter section of the stepped through holes (2-2) faces the upper surface and the small diameter section faces the lower surface. Two first through holes (2-3) are opened on the outer end face of the upper block (2). The nominal diameter of the first through holes (2-3) is consistent with the two holes at the outer end of the variable cross-section tube liner. Two second through holes (2-4) are opened on the inner end face of the upper block (2). The nominal diameter of the second through holes (2-4) is consistent with the two holes at the inner end of the variable cross-section tube liner. Two first crack-stopping holes (2-5) are opened at the root of the first pointed rod-shaped boss (2-1) in the inner cavity of the upper block (2). The upper surface of the upper block (2) is curved. The middle part of the upper surface has a first groove (2-6) of the corresponding shape corresponding to the inner cavity reinforcing rib of the beam. The lower surface of the upper block (2) is flat. The lower block (3) is a hollow block structure. The inner cavity of the lower block (3) has a second pointed rod-shaped boss (3-1); three threaded through holes (3-2) are opened; two third through holes (3-3) are opened on the outer end face of the lower block (3), and the nominal diameter of the third through hole (3-3) is consistent with the two holes at the outer end of the variable cross-section tube cavity liner; two fourth through holes (3-4) are opened on the inner end face of the lower block (3), and the nominal diameter of the fourth through hole (3-4) is consistent with the two holes at the inner end of the variable cross-section tube cavity liner; two second crack-stopping holes (3-5) are opened at the root of the second pointed rod-shaped boss (3-1) in the inner cavity of the lower block (3); the lower surface of the lower block (3) is curved, and the middle of the lower surface has a second groove (3-6) of the corresponding shape corresponding to the inner cavity reinforcing rib of the beam; the upper surface of the lower block (3) is flat. The locking screw (4) passes through the upper block (2) and is screwed into the threaded through hole of the lower block (3); The upper block (2) and the lower block (3) are aligned on the same plane. The three stepped through holes (2-2) on the upper block (2) and the three threaded through holes (3-2) on the lower block (3) are aligned to form a block assembly. At the same time, the inner cavities of the upper block (2) and the lower block (3) are combined to form the inner cavity of the block, which is used to place the variable cross-section tube liner. A feeler gauge is inserted into the gap formed by the mating surfaces of the upper block (2) and the lower block (3). The four sides of the profile inspection template (1) are consistent with the outer sides of the upper block (2) and the lower block (3). The upper surface of the profile inspection template (1) matches the upper surface of the upper block (2). The lower surface of the profile inspection template (1) matches the lower surface of the lower block (3). After the profiles match, the profile inspection template (1) slides along the extension direction of the reinforcing rib (1-1).

2. An adjustable fitting method for a variable cross-section pipe liner, characterized in that, The method utilizes the adjustment and fitting device for the variable cross-section tube liner as described in claim 1, and includes: Step 1: Insert the mold block: Align the reinforcing ribs in the inner cavity of the main beam with the grooves on the upper and lower mold blocks, and then push the mold block along the reinforcing ribs into the installation position of the variable cross-section tube cavity liner block in the inner cavity of the main beam. Step 2: Insert feeler gauge: Align the four sides of the upper and lower blocks, insert feeler gauges into the gap between the mating planes of the upper and lower blocks until the upper and lower blocks fit into the inner cavity of the beam, and record the total thickness of the inserted steel plates. Step 3: Block assembly: Remove the blocks and feeler gauges from the inner cavity of the beam. Insert the feeler gauge steel sheets of the thickness described in Step 2 into the four corners of the gap between the upper and lower blocks and the mating plane of the blocks, and then tighten the locking screws. Step 4: Assembly of variable cross-section tube liner: Place the variable cross-section tube liner to be repaired into the inner cavity formed by the combination of the upper and lower molded blocks, and insert the bent-handle pin so that the pin is inserted into the through hole on the outer end face of the upper molded block or the through hole on the outer end face of the lower molded block. Step 5: Variable cross-section pipe cavity liner fitting: Using the surfaces of the upper and lower molded blocks as a reference, grind and file the surface of the variable cross-section pipe cavity liner to remove excess material; Step 6: Surface Inspection: Fit the surface inspection template with the corresponding surfaces of the upper and lower blocks. Observe from the outer end face of the template whether the gap between the upper surface of the surface inspection template and the upper surface of the variable cross-section tube liner is qualified, or whether there is local contact between the surface of the surface inspection template and the surface of the variable cross-section tube liner, which may cause the surface inspection template to fail to fit with the upper surface of the upper block or the lower surface of the lower block. If so, it indicates that there is interference. At this time, the contact area needs to be repaired to eliminate the interference. Step 7: Repeat steps 5 and 6 until all interference between the surface inspection template and the upper surface of the upper block or the lower surface of the lower block is eliminated.

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