A flange gasket nondestructive dismounting tool and its using method

Abstract

The application provides a distance-measurable flange gasket nondestructive dismounting tool and a use method, and belongs to the technical field of pipeline maintenance; the tool comprises a support plate, an extrusion rod, a tension rod, a plug gauge and a trunnion, the extrusion rod and the tension rod are respectively threadedly connected to the support plate, the tension rod is symmetrically arranged on the two sides of the extrusion rod, and the trunnion is inserted into one end of the two tension rods; the plug gauge is arranged at one end of the extrusion rod and has a wedge-shaped sharp head facing the trunnion; the axes of the extrusion rod, the tension rod and the trunnion are coplanar. The stress of each component is clear, the stability is high, and the operation safety is effectively improved; the opening distance of the connected flange can be accurately controlled, the sealing surface will not be damaged, and the tool has good universality.

Description

Technical Field

[0001] This invention belongs to the field of pipeline installation and maintenance technology, and in particular relates to a non-destructive disassembly and assembly tool and method for a distance-measuring flange gasket. Background Technology

[0002] In various industrial pipeline systems such as chemical, power, water supply and drainage, and HVAC, the connecting flanges of pipes or valves are prone to leakage under long-term operation, requiring disassembly of the flanges and replacement of internal gaskets. Because the connecting flanges are located in narrow, confined spaces, and the pipeline is constantly subjected to thermal expansion, the two flanges are continuously compressed and tightly fitted, with very small gaps that are difficult to separate. Current technology typically uses simple tools such as pry bars, screwdrivers, and wedges to pry open the flanges. This method has the following problems: First, the point of force is easily misaligned during prying, the instantaneous impact force is large, and the tools are prone to slipping and ejecting, easily causing injury to personnel; second, it is difficult to accurately control the flange opening distance, easily causing pipeline deformation and gasket misalignment; third, the prying points are sharp, easily scratching and damaging the flange sealing surface, leading to flange failure. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a non-destructive disassembly and assembly tooling and method for measuring distance flange gaskets, which has high stability, can accurately control the opening distance of the connecting flange, and avoid damage to the flange sealing surface.

[0004] The technical solution adopted in this invention is: a non-destructive disassembly and assembly tooling for a distance-measuring flange gasket, comprising a support plate, a pressing rod, a tension rod, a feeler gauge, and a trunnion. The pressing rod and the tension rod are respectively threaded to the support plate. The tension rods are symmetrically arranged on both sides of the pressing rod. The trunnion is inserted into one end of the two tension rods. The feeler gauge is arranged at one end of the pressing rod and has a wedge-shaped tip facing the trunnion. The axes of the pressing rod, the tension rod, and the trunnion are all coplanar.

[0005] Furthermore, the support plate is provided with a first threaded hole for connecting the extrusion rod and a second threaded hole for connecting the tension rod. The first threaded hole is opened at the geometric center of the support plate; the second threaded holes are symmetrically arranged on both sides of the first threaded hole and have a set distance between them.

[0006] Furthermore, one end of the tension rod is provided with an end cap, and the two ends have a limiting surface on their opposite sides, and an insertion hole perpendicular to the limiting surface is provided, through which the trunnion passes.

[0007] Furthermore, fixing pins are provided at both ends of the trunnion, and the fixing pins are arranged perpendicular to the axis of the trunnion.

[0008] Furthermore, the wedge-shaped tip includes extrusion ramps, which are arranged opposite each other and connected at the end away from the extrusion rod to form a pointed structure.

[0009] Furthermore, the wedge-shaped tip also includes a marking surface, which is disposed between the extrusion inclined surfaces and has scale markings distributed along the axial direction of the extrusion rod.

[0010] Furthermore, the feeler gauge also includes a pressure-bearing part, which is connected to and aligned with one end of the extrusion ramp that is far apart from each other; the other end of the pressure-bearing part is threadedly connected to the extrusion rod.

[0011] Furthermore, the wedge-shaped tip also includes a clearance opening, which is located in the middle of the pointed structure and is adapted to the trunnion.

[0012] Furthermore, the other end of the extrusion rod is provided with a rotating flange; the rotating flange is detachably connected to an extension arm.

[0013] The method of using the distance-measuring flange gasket non-destructive disassembly and assembly tooling as described above includes the following steps:

[0014] Assemble the support plate, compression rod, tension rod, and feeler gauge;

[0015] The trunnion is inserted into the bolt holes of the connecting flange, and the tension rod is installed at both ends of the trunnion;

[0016] Adjust the position of the feeler gauge so that it is aligned with the gap between the connecting flanges;

[0017] Tighten the flange to allow the feeler gauge to extend into the gap, creating a set distance between it and the connecting flange.

[0018] The advantages and positive effects of this invention are:

[0019] (1) By setting up a support plate, a pressing rod, a tension rod, a feeler gauge and a trunnion, the trunnion is fixed in the bolt hole of the connecting flange, and the pressing rod drives the feeler gauge to extend into the gap of the connecting flange. The pressure borne by the pressing rod is transmitted to the support plate and the tension rod in sequence, realizing the closed-loop transmission of force. The force of each component is clear, the force transmission path is clear, the stability is high, and the safety of operation is effectively improved.

[0020] (2) By setting the tension rod threaded to the support plate, the distance between the trunnion and the support plate can be adjusted. At the same time, the feeler gauge threaded to the extrusion rod can be selected as needed, so that the working conditions can be adapted to the connection flanges of different specifications, and it has good versatility.

[0021] (3) By setting scale marks on the feeler gauge, the opening gap of the connecting flange can be precisely controlled to meet the gasket disassembly and assembly requirements and effectively avoid pipe deformation and gasket misalignment caused by excessive opening gap;

[0022] (4) By setting a guide slope, the feeler gauge will not damage the sealing surface when it enters the gap of the connecting flange, thus ensuring the performance of the connecting flange. Attached Figure Description

[0023] Figure 1 This is a front view of the structure of a specific embodiment of the present invention;

[0024] Figure 2 This is a structural side view of a specific embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of a support plate structure according to a specific embodiment of the present invention;

[0026] Figure 4 This is a front view of a tension rod structure according to a specific embodiment of the present invention;

[0027] Figure 5 This is a side view of a tension rod structure according to a specific embodiment of the present invention;

[0028] Figure 6 This is a front view of a feeler gauge structure according to a specific embodiment of the present invention;

[0029] Figure 7 This is a side view of a feeler gauge structure according to a specific embodiment of the present invention;

[0030] Figure 8 This is a top view of a feeler gauge structure according to a specific embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of a rotating flange structure according to a specific embodiment of the present invention;

[0032] Figure 10 This is a front view of a specific embodiment of the present invention.

[0033] Figure 11 This is a side view of a specific embodiment of the present invention.

[0034] Figure 12 This is a schematic diagram illustrating the usage method of another specific embodiment of the present invention.

[0035] In the picture:

[0036] 1. Support plate; 11. First threaded hole; 12. Second threaded hole; 2. Tension rod; 21. Insertion hole; 11. Limiting surface; 3. Trunnion; 31. Pin hole; 4. Fixing pin; 5. Fastening nut; 6. Feeler gauge; 61. Extrusion bevel; 62. Marking surface; 63. Connecting surface; 64. Scale mark; 65. Clearance opening; 66. Pressure bearing part; 67. Third threaded hole; 7. Extrusion rod; 8. Rotary flange; 9. Extension arm; 10. Connecting flange. Detailed Implementation

[0037] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0038] Before introducing the technical solution of this application, let's go over the technical issues in related technologies in detail.

[0039] Connecting flanges are the main connecting components of pipelines or valves. Two connecting flanges are connected by bolts, and a gasket is placed between the sealing surfaces of the connecting flanges. By tightening the bolts, a sealing connection is achieved between pipelines or between a pipeline and a valve. The gasket serves to seal the connection, compensate for machining or assembly errors, and provide vibration damping. However, under pressure fluctuations, thermal cycles, and vibration conditions, or after prolonged use, gaskets are prone to creep loosening, compression damage, etc. In such cases, the gasket needs to be replaced. During replacement, the two connecting flanges must be separated to remove the gasket from between them.

[0040] However, most connecting flanges are located in narrow and confined spaces such as pipe gallery interlayers, equipment gaps, and underground well chambers, making it impossible to use conventional large-scale tooling; at the same time, the pipeline is subjected to long-term thermal expansion, which generates axial stress, and the two connecting flanges are continuously pressed and tightly fitted, with very small gaps that are difficult to separate.

[0041] In existing technologies, simple tools such as pry bars, screwdrivers, and wedges are commonly used to pry open the connecting flange. During the prying process, the point of force is easily misaligned, the instantaneous impact force is large, and the tools are prone to slipping and popping out, which can easily cause personnel to be bumped and injured. The prying points are sharp and can easily scratch or damage the flange sealing surface, leading to the scrapping of the flange. It is suggested that the tools are difficult to accurately control the flange opening distance, which can easily cause pipe deformation and gasket misalignment. Moreover, after the prying force is released, the connecting flange will instantly spring back and clamp, which poses a risk of pinching injury.

[0042] In view of this, in order to solve the above problems, such as Figure 1 , Figure 2As shown, this application provides a non-destructive assembly and disassembly fixture for a distance-measuring flange gasket, including a support plate 1, a pressing rod 7, a tension rod 2, a feeler gauge 6, and a trunnion 3. The pressing rod 7 and the tension rod 2 are threaded to the support plate 1, respectively. The tension rods 2 are symmetrically arranged on both sides of the pressing rod 7. The trunnion 3 is inserted into one end of the two tension rods 2. The feeler gauge 6 is located at one end of the pressing rod 7 and has a wedge-shaped tip facing the trunnion 3. The axes of the pressing rod 7, the tension rod 2, and the trunnion 3 are coplanar. The trunnion 3 is used to pass through the bolt holes of the connecting flange 10, thereby fixing the tension rod 2 to both sides of the two connecting flanges 10.

[0043] The extrusion rod 7 is used to move the feeler gauge 6 towards the trunnion 3, using the wedge-shaped tip to open the gap of the connecting flange 10 and fix it between the connecting flanges 10 to facilitate the removal of the gasket; the feeler gauge 6 is used to directly contact the sealing surface of the connecting flange 10. By controlling the length of the wedge-shaped tip extending into the gap of the connecting flange 10, the shape characteristics of the wedge-shaped tip are used to achieve precise control of the degree of opening of the gap, thereby avoiding the situation where the gap is too small and the gasket is difficult to remove, or the gap is too large and causes pipe deformation and gasket misalignment.

[0044] The support plate 1 is used to set the extrusion rod 7 and the tension rod 2. It can also limit the movement direction of the extrusion rod 7 through the threaded self-locking structure. Specifically, when it is necessary to separate the connecting flange 10, it ensures that the wedge tip moves into the gap; after the gasket is removed, it ensures that the wedge tip moves out of the gap, thereby effectively preventing the extrusion rod 7 or the connecting flange 10 from springing back, and ensuring the safety of the gasket removal and installation operation.

[0045] The tension rod 2 is threaded to the support plate 1. The connection point between the tension rod 2 and the support plate 1 can be selectively configured according to different working conditions. This connection point can be located at different axial positions of the tension rod 2, and can be adjusted and controlled according to the specifications of the connecting flange 10, ensuring sufficient spacing between the trunnion 3 and the support plate 1, thus providing good versatility. For example, if the connecting flange 10 has a larger specification and a larger distance between its bolt holes and the outer edge of the connecting flange 10, moving the tension rod 2 towards the trunnion 3 can increase the spacing between the trunnion 3 and the support plate 1, making it greater than the distance between the bolt holes and the outer edge of the connecting flange 10, allowing the trunnion 3 to pass smoothly through the bolt holes. Similarly, if the connecting flange 10 has a smaller specification, the tension rod 2 can be adjusted in the opposite direction to ensure it matches the specifications of the connecting flange 10, while simultaneously improving the overall structural stability.

[0046] By setting the axes of the compression rod 7, the tension rod 2, and the trunnion 3 to be coplanar, the force centers of each major force-transmitting component are located in the same plane, which eliminates the risk of additional bending moments between components, ensures balanced force distribution across the entire device, and improves structural stability. Specifically, when the compression rod 7 moves inward into the gap, it bears the compressive force from the connecting flange 10. This compressive force is transmitted to the tension rod 2 via the support plate 1, causing the two ends of the tension rod 2 to be subjected to bidirectional tensile forces applied by the support plate 1 and the connecting flange 10, respectively. This achieves closed-loop force transmission, clearly defines the force distribution path of each component, ensures high stability, and effectively improves operational safety.

[0047] Furthermore, this tooling is connected to the connecting flange 10 only through the trunnion 3. As long as the diameter of the trunnion 3 is smaller than the bolt hole of the connecting flange 10, assembly and installation can be achieved. It is not limited by construction conditions and the positional relationship between bolt holes. It can be flexibly set at any convenient location on the connecting flange 10, making it more convenient to use and more suitable for narrow working spaces. It does not require clamping pipes and has strong versatility.

[0048] Furthermore, in the embodiments of this application, such as Figure 3 As shown, the support plate 1 is provided with a first threaded hole 11 for connecting the extrusion rod 7 and a second threaded hole 12 for connecting the tension rod 2. The first threaded hole 11 is opened at the geometric center of the support plate 1; the second threaded holes 12 are symmetrically arranged on both sides of the first threaded hole 11 and have a set distance between them; the first threaded hole 11 and the second threaded hole 12 are respectively used for assembling the extrusion rod 7 and the tension rod 2. When the feeler gauge 6 is inserted into the gap between the connecting flanges 10, the connecting flanges 10 move towards the tension rod 2; the set distance between the first threaded hole 11 and the second threaded hole 12 can meet the required travel of the connecting flanges 10 when the gap is opened to a set width.

[0049] Specifically, there is a set distance between the first threaded hole 11 and the second threaded hole 12, such that there is a distance A between the two second threaded holes 12, and the set width of the gap is B. The connecting flange 10 has a thickness C. Preferably, A > B + 2C.

[0050] Furthermore, in the embodiments of this application, such as Figure 4 , Figure 5As shown, one end of the tie rod 2 is provided with a head, and the two ends have a limiting surface 11 on the opposite side, and a socket 21 perpendicular to the limiting surface 11 is provided. The trunnion 3 passes through the socket 21. In use, the tie rod 2 is located on both sides of the connecting flange 10, with the limiting surface 11 facing the connecting flange 10. The trunnion 3 passes through the socket 21, bolt hole, and socket 21 in sequence. The connecting flange 10 is opened up and approaches the limiting surface 11. The limiting surface 11 can abut against the connecting flange 10 when the connecting flange 10 is opened to a certain width, thereby limiting the position of the connecting flange 10 and preventing excessive opening from causing pipe deformation.

[0051] Specifically, one end of the tension rod 2 is a circular rod-shaped structure with external threads, which can be fixed to the support plate 1 by fastening the nut 5; the other end is provided with an end head, which extends to both sides on the basis of the circular rod-shaped structure to form an enlarged structure with a limiting surface 11; the limiting surface 11 has a sufficient area to fully contact the connecting flange 10 when limiting, so as to play a good limiting role and improve the stability of the overall structure.

[0052] Furthermore, in this embodiment, fixing pins 4 are provided at both ends of the trunnion 3, and the fixing pins 4 are arranged perpendicular to the axis of the trunnion 3; specifically, pin holes 31 are provided at both ends of the trunnion 3, and the fixing pins 4 are detachably disposed in the pin holes 31. At least one end of the fixing pin 4 protrudes from the pin hole 31 to fix the trunnion 3 in the insertion hole 21, preventing the trunnion 3 from coming out during use, thereby improving the stability and safety of the tooling.

[0053] In this embodiment, the side of the end facing the fixing pin 4 is also a planar structure. When the trunnion 3 is fixed to the end, the fixing pin 4 is located outside the end, and the trunnion 3 can undergo a slight axial displacement relative to the tension rod 2, so as to adjust the position of the wedge tip to align it with the gap between the connecting flanges 10.

[0054] Furthermore, in the embodiments of this application, such as Figures 6 to 8 As shown, the wedge-shaped tip includes a pressing bevel 61, which is disposed opposite to each other and connected at the end away from the pressing rod 7 to form a pointed structure. The pressing bevel 61 is used to directly contact the outer edge of the sealing surface of the connecting flange 10, thereby opening the gap and allowing the pointed structure to extend into the gap, while avoiding damage to the sealing surface.

[0055] Specifically, the tip of the pointed structure has an edge-like structure with a certain length, and its length direction is perpendicular to the trunnion 3 during use. The extrusion bevels 61 are arranged opposite each other, which can simultaneously open the connecting flanges 10 at both ends, so that the wedge-shaped tip can be wedged in smoothly and evenly, and the force can be balanced and stable, thus avoiding slippage.

[0056] Furthermore, in this embodiment, the wedge-shaped tip also includes a marking surface 62, which is disposed between the extrusion inclined surfaces 61 and has scale lines 64 distributed along the axial direction of the extrusion rod 7. The two ends of the scale lines 64 are respectively connected to the extrusion inclined surfaces 61, and their length is the thickness of the wedge-shaped tip at the location. By reading the scale lines 64 corresponding to the contact area between the pressure inclined surface and the connecting flange 10, the opening width of the gap can be obtained, thereby accurately controlling the opening spacing of the connecting flange 10.

[0057] In one specific embodiment, the wedge-shaped tip includes opposing extrusion bevels 61, one end of which forms a pointed structure, and the other end has a connecting surface 63; a marking surface 62 is disposed between the extrusion bevels 61 and perpendicular to the connecting surface 63. A scale line 64 is perpendicular to the tip edge of the pointed structure.

[0058] Furthermore, in this embodiment, the feeler gauge 6 further includes a pressure-bearing portion 66, which connects to and aligns the ends of the extrusion bevels 61 that are far apart from each other; the other end of the pressure-bearing portion 66 is threadedly connected to the extrusion rod 7. The pressure-bearing portion 66 is used to directly contact the sealing surface when the wedge-shaped tip is inserted into the gap between the connecting flanges 10, so as to maintain the distance between the connecting flanges 10 and facilitate the gasket removal and installation operation.

[0059] Specifically, the pressure-bearing part 66 is disposed on the connecting surface 63 and can be a cylinder, cuboid or cube. Its two sides are aligned with the extrusion slope 61. That is to say, along the length of the trunnion 3, the thickness of the pressure-bearing part 66 is the same as the thickness of the large end of the wedge tip. In some working conditions, it is necessary to insert the wedge tip into the connecting flange 10 for a certain length. At this time, the pressure-bearing part 66 can support the connecting flange 10 so as to maintain the opening gap of the connecting flange 10 and prevent the connecting flange 10 from springing back.

[0060] The other end of the pressure-bearing part 66 is threaded to the extrusion rod 7 to facilitate the replacement of the feeler gauge 6 so that it can be adapted to the specifications of the connecting flange 10. For example, when the specifications of the connecting flange 10 are large, a larger size feeler gauge 6 can be used to give the connecting flange 10 a larger opening gap; when the specifications of the connecting flange 10 are small, a smaller size feeler gauge 6 can be used to give the connecting flange 10 a smaller opening gap.

[0061] Specifically, the other end of the pressure-bearing part 66 is provided with a third threaded hole 67, and the end of the extrusion rod 7 is provided with an external thread that is compatible with it.

[0062] Furthermore, in this embodiment, the wedge-shaped tip also includes a clearance opening 65, which is disposed in the middle of the pointed structure and adapted to the trunnion 3. When the wedge-shaped tip extends into the gap between the connecting flanges 10, it simultaneously moves closer to the trunnion 3. By providing the clearance opening 65, the movement of the wedge-shaped tip to the position where it fits into the trunnion 3 is ensured, thus ensuring that the movement stroke of the wedge-shaped tip meets the operational requirements.

[0063] Specifically, the opening width of the clearance 65 is greater than the diameter of the trunnion 3, and it extends to a set height along the edge of the pointed structure toward the pressure-bearing part 66.

[0064] Furthermore, in the embodiments of this application, such as Figure 9 The other end of the extrusion rod 7 is provided with a rotating flange 8; the rotating flange 8 is detachably connected to an extension arm 9. The rotating flange 8 is used to screw the extrusion rod 7 to control the movement of the extrusion rod 7 toward or away from the connecting flange 10; by providing the extension arm 9, the rotational torque can be increased so that the operator can rotate the rotating flange 8 with less effort.

[0065] In one specific embodiment, the rotary flange 8 adopts a cross structure, and the extended arm 9 is detachably mounted on a support rod of the cross structure, which can be flexibly installed or removed as needed.

[0066] In the embodiments of this application, such as Figure 10-12 As shown, the flange gasket non-destructive disassembly and assembly tooling proposed in this application can be used individually or in sets of multiple pieces. For example, for small-sized connecting flanges 10, it can be used individually; for larger-sized connecting flanges 10, multiple pieces can be used in sets of multiple pieces. When in use, multiple tooling pieces are evenly arranged along the circumference of the connecting flanges 10 to ensure that the connecting flanges 10 are subjected to uniform force and that the two connecting flanges 10 are spread out in parallel.

[0067] This application also proposes a method for using the above-mentioned non-destructive disassembly and assembly tooling for the distance-measuring flange gasket, including the following steps:

[0068] S1. Assemble support plate 1, extrusion rod 7, tension rod 2 and feeler gauge 6;

[0069] Install the extrusion rod 7 and the tension rod 2 on the support plate 1 respectively. Adjust the length of the tension rod 2 on one side of the support plate 1 according to the specifications of the connecting flange 10, and lock the tension rod 2 with the fastening nut 5. Install the feeler gauge 6 on one end of the extrusion rod 7, and adjust the extrusion rod 7 so that the feeler gauge 6 is close to the support plate 1.

[0070] S2. Pass the trunnion 3 through the bolt holes of the connecting flange 10, and install the tension rod 2 at both ends of the trunnion 3;

[0071] The original bolts in the bolt holes have been removed. Select a suitable bolt hole, pass the trunnion 3 through the bolt hole, and then pass both ends of it through the insertion holes 21 at the end of the tension rod 2, and lock it in place with the fixing pin 4; ensure that the trunnion 3 is parallel to the support plate 1.

[0072] S3. Adjust the position of feeler gauge 6 so that it is aligned with the gap between connecting flanges 10;

[0073] Specifically, the position of the support plate 1 or the position of the overall tooling can be adjusted so that the edge of the wedge tip is aligned with the gap between the connecting bolts.

[0074] S4. Tighten the flange 8 to insert the feeler gauge 6 into the gap, so that there is a set distance between it and the connecting flange 10.

[0075] The set spacing can meet the needs of gasket removal or replacement between connecting flanges 10. During the movement of feeler gauge 6, the opening spacing of connecting flanges 10 can be controlled by observing the scale mark 64 on feeler gauge 6.

[0076] After the gasket replacement and disassembly are completed, the flange 8 can be rotated in the opposite direction to gradually remove the feeler gauge 6, so that the two connecting flanges 10 slowly approach and clamp the gasket; then the tooling can be removed and the original bolts of the connecting flanges 10 can be reinstalled.

[0077] The advantages and positive effects of this invention are:

[0078] (1) By setting up a support plate, a pressing rod, a tension rod, a feeler gauge and a trunnion, the trunnion is fixed in the bolt hole of the connecting flange, and the pressing rod drives the feeler gauge to extend into the gap of the connecting flange. The pressure borne by the pressing rod is transmitted to the support plate and the tension rod in sequence, realizing the closed-loop transmission of force. The force of each component is clear, the force transmission path is clear, the stability is high, and the safety of operation is effectively improved.

[0079] (2) By setting the tension rod threaded to the support plate, the distance between the trunnion and the support plate can be adjusted. At the same time, the feeler gauge threaded to the extrusion rod can be selected as needed, so that the working conditions can be adapted to the connection flanges of different specifications, and it has good versatility.

[0080] (3) By setting scale marks on the feeler gauge, the opening gap of the connecting flange can be precisely controlled to meet the gasket disassembly and assembly requirements and effectively avoid pipe deformation and gasket misalignment caused by excessive opening gap;

[0081] (4) By setting a guide slope, the feeler gauge will not damage the sealing surface when it enters the gap of the connecting flange, thus ensuring the performance of the connecting flange.

[0082] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made in accordance with the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A non-destructive disassembly and assembly fixture for a distance-measuring flange gasket, characterized in that: The device includes a support plate, a pressing rod, a tension rod, a feeler gauge, and a trunnion. The pressing rod and the tension rod are threaded to the support plate, and the tension rods are symmetrically arranged on both sides of the pressing rod. The trunnion is inserted into one end of the two tension rods. The feeler gauge is located at one end of the pressing rod and has a wedge-shaped tip facing the trunnion. The axes of the pressing rod, the tension rod, and the trunnion are all coplanar.

2. The non-destructive disassembly and assembly fixture for a distance-measuring flange gasket according to claim 1, characterized in that: The support plate is provided with a first threaded hole for connecting the extrusion rod and a second threaded hole for connecting the tension rod. The first threaded hole is located at the geometric center of the support plate. The second threaded holes are symmetrically arranged on both sides of the first threaded hole and are at a set distance from the first threaded hole.

3. The non-destructive disassembly and assembly fixture for a distance-measuring flange gasket according to claim 1 or 2, characterized in that: One end of the tension rod is provided with a head, and the two ends have a limiting surface on their opposite sides, and a hole perpendicular to the limiting surface is provided, through which the trunnion passes.

4. The non-destructive disassembly and assembly fixture for a distance-measuring flange gasket according to claim 3, characterized in that: The two ends of the trunnion are provided with fixing pins, which are arranged perpendicular to the axis of the trunnion.

5. The non-destructive disassembly and assembly fixture for a distance-measurable flange gasket according to claim 1, 2, or 4, characterized in that: The wedge-shaped tip includes extrusion ramps, which are arranged opposite each other and connected at the end away from the extrusion rod to form a pointed structure.

6. The non-destructive disassembly and assembly fixture for a distance-measuring flange gasket according to claim 5, characterized in that: The wedge-shaped tip also includes a marking surface, which is disposed between the extrusion inclined surfaces and has scale markings distributed along the axial direction of the extrusion rod.

7. The non-destructive disassembly and assembly fixture for a distance-measuring flange gasket according to claim 6, characterized in that: The feeler gauge also includes a pressure-bearing part, which is connected to and aligned with one end of the extrusion ramp that is far apart from each other; the other end of the pressure-bearing part is threadedly connected to the extrusion rod.

8. The non-destructive disassembly and assembly fixture for a distance-measurable flange gasket according to claim 6 or 7, characterized in that: The wedge-shaped tip also includes a clearance opening, which is located in the middle of the pointed structure and is adapted to the trunnion.

9. The non-destructive disassembly and assembly fixture for a distance-measuring flange gasket according to claim 1, characterized in that: The other end of the extrusion rod is provided with a rotating flange; the rotating flange is detachably connected to an extension arm.

10. The method of using the non-destructive disassembly and assembly tooling for a distance-measuring flange gasket as described in any one of claims 1-9, characterized in that, Includes the following steps: Assemble the support plate, compression rod, tension rod, and feeler gauge; The trunnion is inserted into the bolt holes of the connecting flange, and the tension rod is installed at both ends of the trunnion; Adjust the position of the feeler gauge so that it is aligned with the gap between the connecting flanges; Tighten the flange to allow the feeler gauge to extend into the gap, creating a set distance between it and the connecting flange.

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