Disassembling and assembling correction method and correction device for fusing emergency valve

Abstract

The invention relates to a dismounting and mounting correction method and correction device for a fusing emergency valve. The bolt dismounting and mounting method comprises the steps that S1, the fusing emergency valve is closed, a balance valve is opened, and a ground well refueling plug releases pressure; s2, a ground well refueling bolt is dismantled, a fusing emergency valve is opened, and a ground well oil conveying pipeline releases pressure; s3, the flange between the ground well oil conveying pipeline and the fusing emergency valve is sleeved with the dismounting and mounting correction device, and mounting of the dismounting and mounting correction device is completed; s4, the offset of all connecting bolts on the flange is obtained; s5, performing sum calculation on the obtained offsets of all the connecting bolts to obtain an offset average value, recording the offset average value as N, and adjusting the connecting bolts of which the offsets are greater than the sum of N and a preset value; and S6, after the offset of the connecting bolts is adjusted, all the connecting bolts are dismantled, and replacement of the fusing emergency valve is completed. The offset of the connecting bolt is obtained and corrected through the offset correction bolt, disassembly and assembly of the connecting bolt between the well oil conveying pipeline and the fusing emergency valve are efficiently completed, and the fusing emergency valve is replaced in time.

Description

Technical Field

[0001] The invention relates to the technical field of underground well oil pipelines, and in particular to a disassembly and assembly correction method and a correction device for a fuse emergency valve. Background Art

[0002] As an important part of the underground well refueling hydrant, the fuse emergency valve plays a vital role in ensuring the safe use of pipeline refueling vehicles. In an emergency, the fuse emergency valve can quickly cut off the oil supply from the underground well refueling hydrant, ensuring the life safety of relevant personnel and the property safety of pipeline refueling vehicles and other equipment, minimizing losses.

[0003] Due to the frequent refueling operations of pipeline refueling trucks, the underground well refueling hydrants will be used repeatedly due to frequent operations, resulting in certain deformation of the underground well refueling hydrants above the underground well oil pipeline. In addition, the long-term temperature and humidity changes will also cause a certain positional offset of the underground well oil pipeline. In severe cases, it may even cause oil leakage between the underground well oil pipeline and the underground well refueling hydrant. In this case, it is necessary to check and replace the fuse emergency valve in time to ensure the normal use of the fuse emergency valve and eliminate safety hazards. However, since the underground well refueling hydrant has been deformed or the position of the underground well oil pipeline has been offset, the connecting bolts of the flange between the underground well oil pipeline and the fuse emergency valve will have offset stress, and it is difficult to disassemble and assemble the connecting bolts on the flange. In addition, the above-mentioned components are all in the underground well, and the operating space is narrow, making it difficult to replace the fuse emergency valve. This results in a long legacy of safety hazards, and the fuse emergency valve cannot be replaced in time, which seriously affects the replacement efficiency of the fuse emergency valve and increases the workload of operators. Generally, a set of underground oil pipelines is equipped with dozens or even hundreds of underground oil hydrants, so the fuse emergency valve is difficult to disassemble and replace, which poses a huge safety hazard.

[0004] To this end, the present application provides a method and device for disassembling and calibrating a fuse emergency valve. Summary of the invention

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a disassembly and assembly correction method and correction device for a fuse emergency valve, thereby solving the technical problem in the prior art that, due to the deformation of the ground well refueling hydrant or the displacement of the position of the ground well oil pipeline, there is offset stress on the bolts between the ground well oil pipeline and the fuse emergency valve, making it difficult to disassemble and assemble the bolts between the ground well oil pipeline and the fuse emergency valve, resulting in difficulty in replacing the fuse emergency valve.

[0006] In order to achieve the above-mentioned object, the first aspect of the present invention provides a method for disassembling and calibrating a fuse emergency valve, the method comprising:

[0007] S1: Close the fuse emergency valve and open the balance valve to release the pressure of the underground well refueling hydrant;

[0008] S2: Remove the underground well oil plug and open the fuse emergency valve to release the pressure in the underground well oil pipeline;

[0009] S3: Put the disassembly and assembly correction device on the flange between the underground well oil pipeline and the fuse emergency valve, screw the offset correction bolt on the disassembly and assembly correction device into the offset correction screw hole, and abut against the connecting bolt on the flange, and the top teeth on the disassembly and assembly correction device abut against the inner wall of the underground well, and complete the installation of the disassembly and assembly correction device;

[0010] S4: When the offset correction bolt abuts against the connecting bolt on the flange, the offset of all the connecting bolts on the flange is obtained according to the display result of the offset scale groove on the offset correction bolt in the reading window;

[0011] S5: summing up the offsets of all the connecting bolts, and obtaining an average offset value, which is recorded as N, and adjusting the depth of the offset correction bolts screwed into the offset correction screw holes, thereby adjusting the connecting bolts whose offsets are greater than N;

[0012] In step S5, the specific steps of adjusting the connecting bolts whose offset is greater than N plus a preset value include: S51: the offset of the connecting bolts greater than the average offset value N is recorded as M, and the number of the connecting bolts with the offset M is recorded as L, which needs to be judged later;

[0013] S52: When the number of L is equal to half of the total number of connecting bolts, the preset value is 2 mm, and M≥N+2. At this time, the connecting bolts with an offset of M are adjusted, and the offset is adjusted to N;

[0014] S53: When the number of L is less than half of the total number of connecting bolts, the preset value is 1 mm, and M≥N+1. At this time, the connecting bolts with an offset of M are adjusted, and the offset is adjusted to N.

[0015] S6: After the offset of the connecting bolts is adjusted, all the connecting bolts are removed to complete the replacement of the fuse emergency valve.

[0016] The second aspect of the present invention provides a disassembly and assembly correction device for a fuse emergency valve, which is applied to the disassembly and assembly correction method of the fuse emergency valve of the first aspect. The disassembly and assembly correction device includes: a flange sleeve, which is sleeved on the flange; top teeth, which are arranged circumferentially on the flange sleeve and abut against the inner wall of the ground well; an offset correction screw hole, which is through-opened on the circumferential side wall of the flange sleeve and corresponds to the position of the connecting bolt on the flange; an offset correction bolt, which is passed through the offset correction screw hole and abuts against the side of the connecting bolt on the flange; an offset scale groove, which is opened on the side of the offset correction bolt; and a reading window, which is opened on the upper surface of the flange sleeve and is located above the offset correction screw hole.

[0017] Optionally, there are multiple offset correction screw holes, the offset correction screw holes and the offset correction bolts are matched with each other, and the number of the offset correction bolts is the same as the number of the offset correction screw holes.

[0018] Optionally, along the circumference of the flange sleeve, the offset correction screw holes and the top teeth are alternately arranged.

[0019] Optionally, the number of the offset scale grooves on the side surface of each offset correction bolt is at least three.

[0020] Optionally, the accuracy of the scale on each offset scale groove is 1 mm, and the measuring range is at least 10 mm.

[0021] Optionally, the offset correction bolt further includes: a fixing member, which is arranged at the end of the offset correction bolt facing the connecting bolt and is movably connected to the offset correction bolt.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides a disassembly and assembly correction method and a correction device for a fuse emergency valve, wherein a flange sleeve is arranged on the flange between the underground well oil pipeline and the fuse emergency valve, the top teeth abut against the inner wall of the underground well, the offset correction bolts are screwed into the offset correction screw holes and abut against the connecting bolts on the flange, and the offset amount of the connecting bolts on the flange is adjusted by the offset correction bolts, thereby correcting the deformation of the underground well refueling hydrant or the position offset of the underground well oil pipeline, thereby eliminating the offset stress existing in the connecting bolts of the flange between the underground well oil pipeline and the fuse emergency valve, facilitating the timely replacement of the fuse emergency valve, improving the replacement efficiency of the fuse emergency valve, and timely eliminating safety hazards.

[0024] Furthermore, since an offset scale groove is provided on the side of the offset correction bolt, the specific offset of the connecting bolts on each flange can be accurately obtained, and then the connecting bolts can be accurately corrected, which greatly improves the disassembly and assembly efficiency of the connecting bolts on the flange between the underground oil pipeline and the fuse emergency valve.

[0025] Furthermore, since the present invention involves the disassembly and assembly of bolts between the underground well oil pipeline and the fuse emergency valve, and the oil is extremely flammable and explosive, no electrical equipment can be used, and the components involved cannot be subjected to excessive collision and friction during the operation steps to avoid collision sparks or friction sparks. Therefore, the present invention provides a disassembly and assembly correction method and correction device for the fuse emergency valve. On the one hand, the offset of the connecting bolt can be obtained and corrected by offset correction bolts, thereby efficiently completing the disassembly and assembly of the connecting bolts between the underground well oil pipeline and the fuse emergency valve, and quickly eliminating the safety hazard of oil leakage between the underground well oil pipeline and the fuse emergency valve; on the other hand, it can also ensure the safety of operation during the replacement operation of the fuse emergency valve, and will not generate safety hazards such as electric sparks, collision sparks or friction sparks, and will not cause any safety problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of the steps of the method for disassembling and calibrating the fuse emergency valve of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the disassembly and assembly correction device of the fuse emergency valve of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the flange sleeve of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the offset correction bolt of the present invention;

[0030] Figure 5 For Figure 4 Schematic diagram of the cross section of the offset correction bolt along the AA direction;

[0031] Figure 6 The present invention is a schematic structural diagram of an offset correction bolt provided with a fixing member.

[0032] Description of reference numerals:

[0033] 1. Flange sleeve; 2. Top teeth; 3. Offset correction screw hole; 4. Offset correction bolt; 5. Offset scale groove; 6. Connecting bolt; 7. Flange; 8. Reading window; 9. Fixing parts. DETAILED DESCRIPTION

[0034] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0035] Example:

[0036] The embodiment of the first aspect of the present invention provides a method for disassembling and calibrating a fuse emergency valve, such as Figure 1 As shown, the disassembly and assembly correction method includes:

[0037] S1: Close the fuse emergency valve and open the balancing valve to release the pressure on the ground well refueling hydrant; the balancing valve is a conventional pressure relief valve that balances the pressure difference between the ground well refueling hydrant and the atmosphere and is usually used to release the pressure on the ground well refueling hydrant; in fact, during the operation of step S1, the pressure of the ground well refueling hydrant is released to 0Mpa.

[0038] S2: Remove the underground well refueling plug and open the fuse emergency valve to release the pressure in the underground well oil pipeline; communicate with the oil depot control console to confirm that there is no oil pressure in the underground well oil pipeline, release the pressure in the underground well oil pipeline, slowly open the fuse emergency valve, and confirm that there is no oil spill; actually during the operation of step S2, the pressure is released from the source of the oil depot, thereby ensuring that the pressure in the underground well oil pipeline drops to 0Mpa.

[0039] S3: The disassembly and assembly correction device is placed on the outside of the flange 7 between the underground well oil pipeline and the fuse emergency valve, the offset correction bolt 4 on the disassembly and assembly correction device is screwed into the offset correction screw hole 3, and abutted against the connecting bolt 6 on the flange 7, and the top tooth 2 on the disassembly and assembly correction device abuts against the inner wall of the underground well, completing the installation of the disassembly and assembly correction device;

[0040] S4: When the offset correction bolt 4 abuts against the connecting bolt 6 on the flange 7, the offset of all the connecting bolts 6 on the flange 7 is obtained according to the display result of the offset scale groove 5 on the offset correction bolt 4 in the reading window 8;

[0041] S5: summing up the offsets of all the connection bolts 6 and obtaining an average offset value, which is recorded as N, and adjusting the depth of the offset correction bolts 4 screwed into the offset correction screw holes 3, thereby adjusting the connection bolts 6 whose offsets are greater than N;

[0042] In step S5, the specific steps of adjusting the connecting bolts 6 whose offset is greater than N plus a preset value include: S51: the offset of the connecting bolts 6 greater than the average offset value N is recorded as M, and the number of the connecting bolts 6 with the offset value M is recorded as L, which needs to be judged later;

[0043] S52: When the number of L is equal to half of the total number of the connecting bolts 6, the preset value is 2 mm, and M≥N+2. At this time, the connecting bolts 6 with an offset of M are adjusted, and the offset is adjusted to N;

[0044] Through the above arrangement, when the number of connecting bolts 6 that need to be adjusted for the offset is equal to half of the total number of connecting bolts 6, it means that the number of connecting bolts 6 to be adjusted is relatively large. Therefore, the preset value at this time is set to 2mm, thereby reducing the number of connecting bolts 6 that need to be adjusted. On the one hand, it ensures that the connecting bolts 6 with larger offsets have been corrected, which facilitates the efficient replacement of the fuse emergency valve; on the other hand, it reduces the workload of the operator.

[0045] S53: When the number L is less than half of the total number of the connecting bolts 6, the preset value is 1 mm, and M≥N+1. At this time, the connecting bolts 6 with an offset of M are adjusted to N.

[0046] Through the above arrangement, when the number of connecting bolts 6 that need to be adjusted in offset is less than half of the total number of connecting bolts 6, it means that the number of connecting bolts 6 to be adjusted is relatively small. Therefore, the preset value is set relatively low at this time, which is only 1mm. The offset of the connecting bolts 6 that need to be adjusted is then adjusted. This also ensures that the connecting bolts 6 with a larger offset have been corrected, thereby facilitating efficient replacement of the fuse emergency valve.

[0047] To illustrate the specific steps of adjusting the connecting bolts whose offset is greater than N plus the preset value in the above step S5, the total number of the connecting bolts 6 in this embodiment is 4. In step S5:

[0048] The offset of the connecting bolt 6 detected by the first offset correction bolt 4 is 4;

[0049] The offset of the connecting bolt 6 detected by the second offset correction bolt 4 is 7;

[0050] The offset of the connecting bolt 6 detected by the third offset correction bolt 4 is 6;

[0051] The offset of the connecting bolt 6 detected by the fourth offset correction bolt 4 is 1;

[0052] The average value of the offsets of the above four connecting bolts 6 is N=(4+7+6+1) / 4=4.5, that is, N=4.5. The connecting bolts 6 with an offset greater than the average value of the offset N=4.5 are the second connecting bolts 6 with an offset of M=7, and the third connecting bolts 6 with an offset of M=6. At this time, the number of connecting bolts with an offset of M is recorded as L=2. Then, it is necessary to determine:

[0053] Since L=2 in this embodiment is equal to half of the total number 4 of the connecting bolts 6, the preset value is set to 2mm, then M≥N+2, that is, the connecting bolts 6 with M≥4.5+2 are adjusted, that is, the second connecting bolt 6 with an offset of M=7 and the third connecting bolt 6 with an offset of M=6 are adjusted, and the offsets are both adjusted to N=4.5. In actual operation, the N value is rounded to an integer according to the principle of rounding, so N=5 in this embodiment. At this time, the operator uses a wrench to tighten the corresponding offset correction bolt 4 to adjust the offset of the connecting bolt 6 to 5. After the adjustment, the offset stress difference between the above two connecting bolts 6 is reduced, ensuring the smooth removal of the connecting bolt 6 and facilitating the timely replacement of the fuse emergency valve.

[0054] For example, in step S5, in this embodiment, the deviation correction bolt 4 is screwed by a wrench, which is more suitable for the correction of the connecting bolt 6 in the narrow space of the underground well, and effectively overcomes the defect that the complex and bulky mechanical structure in the narrow space of the underground well cannot perform the operation.

[0055] According to S6: after the offset of the connecting bolts 6 is adjusted, all the connecting bolts 6 are removed, thereby completing the replacement of the fuse emergency valve.

[0056] The embodiment of the second aspect of the present invention further provides a disassembly and assembly correction device for a fuse emergency valve, such as Figures 2 to 5 As shown, the disassembly and assembly correction device includes: a flange sleeve 1, which is sleeved on the flange 7; a top tooth 2, which is arranged on the circumference of the flange sleeve 1 and abuts against the inner wall of the ground well; an offset correction screw hole 3, which is through-opened on the circumferential side wall of the flange sleeve 1 and corresponds to the position of the connecting bolt 6 on the flange 7; an offset correction bolt 4, which is passed through the offset correction screw hole 3 and abuts against the side of the connecting bolt 6 on the flange 7; an offset scale groove 5, which is opened on the side of the offset correction bolt 4; and a reading window 8, which is opened on the upper surface of the flange sleeve 1 and is located above the offset correction screw hole 3.

[0057] For example, the offset correction bolt 4 and the connecting bolt 6 on the flange 7 are in contact with each other, and in the process of correction according to the value of the offset, since the top teeth 2 on the flange sleeve 1 have been fixedly abutted against the inner wall of the ground well, the flange sleeve 1 is firmly placed in the ground well, and since the inner wall of the ground well is made of metal, the stability of the flange sleeve 1 is further strengthened. Therefore, in the case where the flange sleeve 1 provides a stable fulcrum, the offset correction bolt 4 inserted in the offset correction screw hole 3 can apply a force opposite to the offset stress direction to the connecting bolt 6, thereby adjusting the offset of the connecting bolt 6 and realizing the correction of the connecting bolt 6.

[0058] In a possible embodiment, Figure 2 and Figure 3As shown, there are multiple offset correction screw holes 3 , the offset correction screw holes 3 and the offset correction bolts 4 are adapted to each other, and the number of the offset correction bolts 4 is the same as the number of the offset correction screw holes 3 .

[0059] Exemplarily, the number of offset correction screw holes 3 opened on the flange sleeve 1 is determined according to the number of connecting bolts 6 between the actual underground oil pipeline and the fuse emergency valve. In this embodiment, the number of connecting bolts 6 is 12, and 12 offset correction screw holes 3 are correspondingly set, and 12 offset correction bolts 4 are matched.

[0060] In a possible embodiment, Figure 2 and Figure 3 As shown, along the circumference of the flange sleeve 1, the offset correction screw holes 3 and the top teeth 2 are alternately arranged.

[0061] Exemplarily, the offset correction screw holes 3 and the top teeth 2 are alternately arranged so that top teeth 2 are provided on both adjacent sides of each offset correction bolt 4. In this way, during the process of each offset correction bolt 4 correcting the connecting bolt 6, the top teeth 2 on both sides can provide firm supporting force, which is more conducive to the offset correction bolt 4 to apply correction to the connecting bolt 6.

[0062] In a possible embodiment, Figure 2 , Figure 4 and Figure 5 As shown, the number of the offset scale grooves 5 on the side surface of each offset correction bolt 4 is at least three.

[0063] For example, the number of offset scale grooves 5 provided on the offset correction bolt 4 in this embodiment is 3, and the 3 offset scale grooves 5 are evenly spaced and arranged in the circumference of each offset correction bolt 4. In this way, in the process of using the offset correction bolt 4 to detect the offset, no matter where the offset correction bolt 4 is rotated, the operator can clearly observe the specific offset of the connecting bolt 6 through the offset scale groove 5, and the offset scale groove 5 will not be affected by the rotation angle of the offset correction bolt 4, causing the operator to be unable to obtain the offset of the connecting bolt 6.

[0064] In a possible embodiment, Figure 4 As shown, the accuracy of the scale on each offset scale groove 5 is 1 mm, and the measuring range is at least 10 mm.

[0065] For example, in this embodiment, the accuracy of the offset scale groove 5 is 1 mm, and the measuring range on the offset scale groove 5 is 20 mm, which ensures that each offset correction bolt 4 detects the offset of the connecting bolt 6 and facilitates the operator to observe the specific result of the offset.

[0066] In a possible embodiment, Figure 6 As shown, the offset correction bolt 4 further includes: a fixing member 9, which is arranged at the end of the offset correction bolt 4 facing the connecting bolt 6 and is movably connected to the offset correction bolt 4.

[0067] Exemplarily, a fixing member 9 is provided at the end of the offset correction bolt 4, that is, the end in contact with the connecting bolt 6 on the flange. The fixing member 9 is in the shape of a "crescent". In the process of adjusting the offset of the connecting bolt 6 by the offset correction bolt 4, it is convenient to fix the connecting bolt 6 more firmly. Since the fixing member 9 is provided, and the size of the fixing member 9 is larger than the diameter of the offset correction bolt 4, when the offset correction bolt 4 is screwed into the offset correction screw hole 3 for the first time, it is necessary to insert it from the inner ring side of the flange sleeve 1, and then the offset correction bolt 4 can be used normally. Secondly, there is an active connection between the fixing member 9 and the offset correction bolt 4. Specifically, the fixing member 9 can be rotated clockwise or counterclockwise relative to the offset correction bolt 4 at will. In this way, in the process of screwing the offset correction bolt 4 to correct the connecting bolt 6, the fixing member 9 can always keep its concave surface in contact with the connecting bolt 6. The active connection between the fixing member 9 and the offset correction bolt 4 belongs to the prior art and is not limited here.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for disassembling and calibrating a fuse emergency valve, characterized in that: The steps of the disassembly and correction method include: S1: Close the fuse emergency valve and open the balance valve to release the pressure of the underground well refueling hydrant; S2: Remove the underground well oil plug and open the fuse emergency valve to release the pressure in the underground well oil pipeline; S3: The disassembly and assembly correction device is put on the outside of the flange between the underground well oil pipeline and the fuse emergency valve, and the offset correction bolt on the disassembly and assembly correction device is screwed into the offset correction screw hole and abutted against the connecting bolt on the flange, and the top teeth on the disassembly and assembly correction device abut against the inner wall of the underground well, completing the installation of the disassembly and assembly correction device; S4: When the offset correction bolt abuts against the connecting bolt on the flange, the offset of all the connecting bolts on the flange is obtained according to the display result of the offset scale groove on the offset correction bolt in the reading window; S5: summing up the offsets of all the connecting bolts, and obtaining an average offset value, recorded as N, adjusting the depth of the offset correction bolts screwed into the offset correction screw holes, and then adjusting the connecting bolts whose offsets are greater than N plus a preset value; S6: After the offset of the connecting bolts is adjusted, all the connecting bolts are removed to complete the replacement of the fuse emergency valve.

2. The method for disassembling and calibrating a fuse emergency valve according to claim 1, characterized in that: In step S5, the specific steps of adjusting the connecting bolts so that the offset is greater than N plus a preset value include: S51: the offset of the connecting bolts greater than the average offset value N is recorded as M, and the number of the connecting bolts with the offset M is recorded as L, which needs to be judged later; S52: When the number of L is equal to half of the total number of connecting bolts, the preset value is 2 mm, and M≥N+2. At this time, the connecting bolts with an offset of M are adjusted to adjust the offset to N; S53: When the number of L is less than half of the total number of connecting bolts, the preset value is 1 mm, then M≥N+1, and at this time, the connecting bolts with an offset of M are adjusted to adjust the offset to N.

3. A disassembly and assembly correction device for a fuse emergency valve, applied to the disassembly and assembly correction method for a fuse emergency valve as claimed in claim 2, characterized in that: include: A flange sleeve, sleeved on the flange; Top teeth, arranged in the circumference of the flange sleeve and abutting against the inner wall of the well; An offset correction screw hole is provided through the circumferential side wall of the flange sleeve and corresponds to the position of the connecting bolt on the flange; An offset correction bolt is inserted into the offset correction screw hole and abuts against a side surface of the connecting bolt on the flange; An offset scale groove is provided on a side surface of the offset correction bolt; A reading window is provided on the upper surface of the flange sleeve and is located above the offset correction screw hole.

4. The disassembly and assembly correction device for the fuse emergency valve according to claim 3, characterized in that: The number of the offset correction screw holes is multiple, the offset correction screw holes and the offset correction bolts are adapted to each other, and the number of the offset correction bolts is the same as the number of the offset correction screw holes.

5. The disassembly and assembly correction device for the fuse emergency valve according to claim 3, characterized in that: Along the circumference of the flange sleeve, the offset correction screw holes and the top teeth are arranged alternately.

6. The disassembly and assembly correction device for the fuse emergency valve according to claim 3, characterized in that: The number of the offset scale grooves on the side surface of each offset correction bolt is at least 3.

7. The disassembly and assembly correction device for the fuse emergency valve according to claim 6, characterized in that: The accuracy of the scale on each offset scale groove is 1 mm, and the measuring range is at least 10 mm.

8. The disassembly and assembly correction device for the fuse emergency valve according to any one of claims 3 to 7, characterized in that: The offset correction bolt also includes: The fixing piece is arranged at the end of the offset correction bolt facing the connecting bolt and is movably connected with the offset correction bolt.

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