A disassembly, assembly and calibration method and calibration device for a fuse emergency valve

Abstract

The present invention relates to a disassembly, assembly and correction method and a correction device for a fuse emergency valve. The bolt disassembly and assembly method includes: S1: Close the fuse emergency valve, open the balance valve, and release the pressure of the underground fuel filling bolt; S2: Remove the underground fuel filling bolt, open the fuse emergency valve, and release the pressure of the underground oil pipeline; S3: Sleeve the disassembly, assembly and correction device outside the flange between the underground oil pipeline and the fuse emergency valve to complete the installation of the disassembly, assembly and correction device; S4: Obtain the offsets of all the connecting bolts on the flange; S5: Add up the offsets of all the obtained connecting bolts and calculate the average value of the offsets, denoted as N, and adjust the connecting bolts with offsets greater than N plus a preset value; S6: After the offsets of the connecting bolts are adjusted, remove all the connecting bolts to complete the replacement of the fuse emergency valve. The present invention obtains the offsets of the connecting bolts through offset correction bolts and corrects them, efficiently completes the disassembly and assembly of the connecting bolts between the underground oil pipeline and the fuse emergency valve, and timely replaces the fuse emergency valve.

Description

Technical Field

[0001] The present invention relates to the technical field of underground well oil pipelines, and particularly relates to a disassembly, installation and calibration method and a calibration device for a fuse emergency valve. Background Art

[0002] As an important part of the underground well fuel filling plug, the fuse emergency valve plays a crucial role in ensuring the safe use of the pipeline refueling vehicle. In case of an emergency, the fuse emergency valve can quickly cut off the fuel supply of the underground well fuel filling plug, ensuring the life safety of relevant personnel and the property safety of equipment such as pipeline refueling vehicles, and minimizing losses.

[0003] Due to the frequent refueling operations of the pipeline refueling vehicle, the frequent operations will repeatedly use the underground well fuel filling plug, resulting in a certain deformation of the underground well fuel filling plug above the underground well oil pipeline. And the perennial temperature and humidity changes will also cause a certain position shift of the underground well oil pipeline located underground. In severe cases, it may even lead to oil leakage between the underground well oil pipeline and the underground well fuel filling plug. 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 potential safety hazards. However, due to the deformation of the underground well fuel filling plug or the position shift of the underground well oil pipeline, there will be offset stress on the connection bolts of the flange between the underground well oil pipeline and the fuse emergency valve, making it difficult to disassemble and install the connection bolts on the flange. Moreover, the above components are all located in the underground well, and the operation space is narrow, resulting in difficulty in replacing the fuse emergency valve. This leads to a long time for potential safety hazards to remain, the fuse emergency valve cannot be replaced in time, seriously affecting the replacement efficiency of the fuse emergency valve and increasing the workload of the operators. Generally, a set of underground well oil pipelines is equipped with dozens or even hundreds of underground well fuel filling plugs. Therefore, the difficulty in disassembling and installing the fuse emergency valve poses a huge safety hazard.

[0004] Therefore, the present application provides a disassembly, installation and calibration method and a calibration device for a fuse emergency valve. Summary of the Invention

[0005] In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides a disassembly, installation and calibration method and a calibration device for a fuse emergency valve, thereby solving the technical problem in the prior art that due to the deformation of the underground well fuel filling plug or the position shift of the underground well oil pipeline, there is offset stress on the bolts between the underground well oil pipeline and the fuse emergency valve, making it difficult to disassemble and install the bolts between the underground well oil pipeline and the fuse emergency valve, resulting in difficulty in replacing the fuse emergency valve.

[0006] To achieve the above object, the first aspect of the present invention provides a disassembly, installation and calibration method for a fuse emergency valve, and the disassembly, installation and calibration method includes:

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

[0008] S2: Remove the underground well fuel filling bolt, open the fuse emergency valve to release the pressure in the underground well oil pipeline.

[0009] S3: Put the disassembly and assembly correction device outside 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 it against the connection bolt on the flange. The top teeth on the disassembly and assembly correction device abut against the inner wall of the underground well to complete the installation of the disassembly and assembly correction device.

[0010] S4: When the offset correction bolt abuts against the connection bolt on the flange, obtain the offset of all connection bolts on the flange according to the display result of the offset scale groove on the offset correction bolt in the reading window.

[0011] S5: Add up the offsets of all obtained connection bolts and calculate the average offset, denoted as N. Adjust the depth of the offset correction bolt screwed into the offset correction screw hole, and then adjust the connection bolts with an offset greater than N.

[0012] In step S5, the specific steps for adjusting the connection bolts with an offset greater than N plus the preset value include: S51: Denote the offset of the connection bolt greater than the average offset N as M, and denote the number of connection bolts with an offset of M as L. Then it is necessary to judge.

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

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

[0015] S6: After the offset of the connection bolts is adjusted, remove all connection bolts, and then 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 in the first aspect. The disassembly and assembly correction device includes: a flange sleeve sleeved on the flange; top teeth arranged on the circumferential direction of the flange sleeve and abutting against the inner wall of the underground well; an offset correction screw hole penetratingly opened on the circumferential side wall of the flange sleeve and corresponding to the position of the connection bolt on the flange; an offset correction bolt passing through the offset correction screw hole and abutting against the side surface of the connection bolt on the flange; an offset scale groove opened on the side surface of the offset correction bolt; and a reading window opened on the upper surface of the flange sleeve and located above the offset correction screw hole.

[0017] Optionally, the number of offset correction screw holes is multiple, and the offset correction screw holes are adapted to the offset correction bolts, and the number of offset correction bolts is the same as the number of offset correction screw holes.

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

[0019] Optionally, the number of offset scale grooves on the side surface of each offset correction bolt is at least 3.

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

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

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

[0023] The present invention provides a disassembly, installation and correction method and a correction device for a fuse emergency valve. By providing a flange sleeve on the flange between the underground oil pipeline and the fuse emergency valve, the top teeth are abutted against the inner wall of the underground well, and the offset correction bolts are screwed into the offset correction screw holes and abutted against the connecting bolts on the flange. The offset of the connecting bolts on the flange is adjusted by the offset correction bolts, correcting the deformation of the underground oil filling bolt or the position offset of the underground oil pipeline, thereby eliminating the offset stress existing in the connecting bolts of the flange between the underground 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 potential safety hazards.

[0024] Furthermore, since the offset scale grooves are provided on the side surface of the offset correction bolt, the specific offset of each connecting bolt on the flange can be accurately obtained, and then the connecting bolts can be accurately corrected, greatly improving the disassembly and installation 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 oil pipeline and the fuse emergency valve, and the oil products are extremely flammable and explosive, any electrical equipment cannot be used, and during the operation steps, the components involved cannot generate excessive collisions and frictions to avoid generating collision sparks or friction sparks. Therefore, the present invention provides a disassembly, assembly and correction method and a correction device for the fuse emergency valve. On the one hand, the offset of the connecting bolt can be obtained and corrected by offset-correcting the bolt, so that the disassembly and assembly of the connecting bolt between the underground oil pipeline and the fuse emergency valve are efficiently completed, and the potential safety hazard of oil leakage between the underground oil pipeline and the fuse emergency valve is quickly eliminated. On the other hand, it can also ensure the operation safety during the replacement operation of the fuse emergency valve, without generating safety hazards such as electric sparks, collision sparks or friction sparks, and without causing any safety problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flowchart of the steps of the disassembly, assembly and correction method for the fuse emergency valve of the present invention;

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

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

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

[0030] Figure 5 is in Figure 4 the sectional view of the offset-correcting bolt along the A-A direction;

[0031] Figure 6 is a schematic structural diagram of the offset-correcting bolt of the present invention provided with a fixing member.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS:

[0033] 1. Flange sleeve; 2. Top tooth; 3. Offset-correcting screw hole; 4. Offset-correcting bolt; 5. Offset scale groove; 6. Connecting bolt; 7. Flange; 8. Reading window; 9. Fixing member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to better understand the above technical solutions, the exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the 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 so that the present invention can be understood more clearly and thoroughly, and the scope of the present invention can be completely conveyed to those skilled in the art.

[0035] Embodiment:

[0036] An embodiment of the first aspect of the present invention provides a disassembly, assembly and alignment method for a fuse emergency valve, as Figure 1 shown, the disassembly, assembly and alignment method includes:

[0037] S1: Close the fuse emergency valve and open the balance valve to release the pressure of the underground well filling bolt; the balance valve is a conventionally provided pressure relief valve, which balances the pressure difference between the underground well filling bolt and the atmosphere, and is usually used to release the pressure of the underground well filling bolt; actually, during the operation of step S1, the pressure of the underground well filling bolt is released to 0 Mpa.

[0038] S2: Remove the underground well filling bolt, open the fuse emergency valve to release the pressure of the underground well oil pipeline; communicate with the oil depot control console to confirm that there is no pressure in the oil product in the underground well oil pipeline, release the pressure of 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, so as to ensure that the pressure in the underground well oil pipeline drops to 0 Mpa.

[0039] S3: Sleeve the disassembly, assembly and alignment device outside the flange 7 between the underground well oil pipeline and the fuse emergency valve, screw the offset correction bolt 4 on the disassembly, assembly and alignment device into the offset correction screw hole 3, and abut against the connection bolt 6 on the flange 7. The top teeth 2 on the disassembly, assembly and alignment device abut against the inner wall of the underground well to complete the installation of the disassembly, assembly and alignment device;

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

[0041] S5: Add up the offsets of all the obtained connection bolts 6 and calculate the average offset value, denoted as N, and adjust the depth of the offset correction bolt 4 screwed into the offset correction screw hole 3, so as to adjust the connection bolts 6 with an offset greater than N;

[0042] In step S5, the specific steps for adjusting the connection bolts with an offset greater than N plus the preset value include: S51: Denote the offset of the connection bolt 6 greater than the average offset value N as M, and denote the number of connection bolts 6 with an offset of M as L, and then it is necessary to judge;

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

[0044] With the above settings, when the number of connecting bolts 6 whose offset needs to be adjusted is equal to half of the total number of connecting bolts 6, it indicates that the number of connecting bolts 6 to be adjusted is relatively large. Therefore, the preset value is set to 2 mm at this time, 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 a large offset have been corrected, facilitating the efficient replacement of the fuse emergency valve; on the other hand, it reduces the workload of the operator.

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

[0046] With the above settings, when the number of connecting bolts 6 whose offset needs to be adjusted is less than half of the total number of connecting bolts 6, it indicates that the number of connecting bolts 6 to be adjusted is relatively small. Therefore, the preset value is set relatively low at this time, only 1 mm. Then, the offset of the connecting bolts 6 that need to be adjusted is adjusted, which also ensures that the connecting bolts 6 with a large offset have been corrected, facilitating the efficient replacement of the fuse emergency valve.

[0047] To illustrate the specific steps of adjusting the connecting bolts with an offset greater than N plus the preset value in step S5 above, in this embodiment, the total number of connecting bolts 6 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] Then, the average value N of the offsets of the above four connecting bolts 6 = (4 + 7 + 6 + 1) / 4 = 4.5, that is, N = 4.5. The connecting bolts 6 with an offset M greater than the average value N = 4.5 are the second connecting bolt 6 with an offset M = 7 and the third connecting bolt 6 with an offset M = 6. At this time, the number of connecting bolts with an offset of M is denoted as L = 2. Then, it is necessary to judge:

[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, the number of offset correction screw holes 3 is multiple. 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 that of the offset correction screw holes 3.

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

[0060] In a possible embodiment, as Figure 2 and Figure 3 shown, along the circumferential direction 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 the top teeth 2 are provided on both sides adjacent to 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 firmly provide a supporting force, which is more conducive to the offset correction bolt 4 applying correction to the connecting bolt 6.

[0062] In a possible embodiment, as Figure 2 、 Figure 4 and Figure 5 shown, the number of the offset amount scale grooves 5 on the side surface of each offset correction bolt 4 is at least 3.

[0063] Exemplarily, the number of the offset amount scale grooves 5 provided on the offset correction bolt 4 in this embodiment is 3, and the 3 offset amount scale grooves 5 are evenly spaced along the circumferential direction of each offset correction bolt 4. With this setting, during the process of detecting the offset amount by using the offset correction bolt 4, no matter which position the offset correction bolt 4 rotates to, the operator can clearly observe the specific offset amount of the connecting bolt 6 through the offset amount scale grooves 5, and it will not be affected by the rotation angle of the offset correction bolt 4, resulting in the offset amount scale grooves 5 facing away from the detecting operator, causing the operator to be unable to obtain the offset amount of the connecting bolt 6.

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

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

[0066] In a possible embodiment, asFigure 6 As shown in Figure 6 , 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, at the end of the offset correction bolt 4, that is, the end in contact with the connecting bolt 6 on the flange, a fixing member 9 is arranged. The fixing member 9 is in the shape of a "crescent moon". During the process of the offset correction bolt 4 adjusting the offset amount of the connecting bolt 6, 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 first screwed into the offset correction screw hole 3 for the first time, it needs to be inserted from the inner ring side of the flange sleeve 1, and then the offset correction bolt 4 can be used normally. Secondly, the fixing member 9 and the offset correction bolt 4 are movably connected. Specifically, the fixing member 9 can rotate clockwise or counterclockwise relative to the offset correction bolt 4 at will. With such a setting, during the process of the offset correction bolt 4 being screwed to correct the connecting bolt 6, the fixing member 9 can always keep its concave surface in contact with the connecting bolt 6. The movable connection between the fixing member 9 and the offset correction bolt 4 belongs to the prior art and is not limited herein.

[0068] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, 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 defined and limited, when the first feature is "above" or "below" the second feature, the first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, when the first feature is "above", "above" and "on" the second feature, the first feature can be directly above or obliquely above the second feature, or only indicate that the first feature has a higher horizontal height than the second feature. When the first feature is "below", "below" and "under" the second feature, the first feature can be directly below or obliquely below the second feature, or only indicate that the first feature has a lower horizontal height than the second feature.

[0070] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A disassembly, assembly and calibration method for a fuse emergency valve, characterized in that The steps of the disassembly, installation and alignment method include: S1: Close the fuse emergency valve and open the balance valve to release the pressure of the underground well filling bolt. S2: Remove the underground well filling bolt and open the fuse emergency valve to release the pressure of the underground well oil pipeline. S3: Sleeve the disassembly, installation and alignment device outside the flange between the underground well oil pipeline and the fuse emergency valve, screw the offset correction bolt on the disassembly, installation and alignment device into the offset correction screw hole, and abut against the connecting bolt on the flange. The top teeth on the disassembly, installation and alignment device abut against the inner wall of the underground well to complete the installation of the disassembly, installation and alignment device. S4: When the offset correction bolt abuts against the connecting bolt on the flange, obtain the offset of all the connecting bolts on the flange according to the display result of the offset scale groove on the offset correction bolt in the reading window. S5: Sum up the offsets of all the obtained connecting bolts, calculate the average offset value, denoted as N, and adjust the depth of the offset correction bolt screwed into the offset correction screw hole, and then adjust the connecting bolts with an offset greater than N plus the preset value. S6: After the offset of the connecting bolts is adjusted, remove all the connecting bolts, and then complete the replacement of the fuse emergency valve.

2. The disassembly, assembly and calibration method of the fuse emergency valve according to claim 1, characterized in that In step S5, the specific steps of adjusting the connecting bolts with an offset greater than N plus the preset value include: S51: Denote the offset of the connecting bolts greater than the average offset value N as M, and denote the number of the connecting bolts with an offset of M as L, and then a judgment is needed. S52: When the number of L is equal to half of the total number of connecting bolts, the preset value is 2 mm, then M≥N + 2. At this time, adjust the connecting bolts with an offset of M and 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. At this time, adjust the connecting bolts with an offset of M and adjust the offset to N.

3. A disassembly, assembly and calibration device for a fusing emergency valve, which is applied to the disassembly, assembly and calibration method for a fusing emergency valve as described in claim 2, and is characterized in that, It includes: A flange sleeve sleeved on the flange; Top teeth arranged on the circumferential direction of the flange sleeve and abutting against the inner wall of the underground well; Offset correction screw holes penetratingly opened on the circumferential side wall of the flange sleeve and corresponding to the positions of the connecting bolts on the flange; Offset correction bolts penetrating through the offset correction screw holes and abutting against the side surfaces of the connecting bolts on the flange; Offset scale grooves opened on the side surfaces of the offset correction bolts; Reading windows opened on the upper surface of the flange sleeve and located above the offset correction screw holes.

4. The disassembly, installation and alignment 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 mutually adapted, and the number of the offset correction bolts is the same as the number of the offset correction screw holes.

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

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

8. The disassembly, assembly and calibration device for the fuse emergency valve according to any one of claims 3 to 7, characterized in that, The offset correction bolt further includes: a fixing member disposed at an end of the offset correction bolt facing the connecting bolt and movably connected to the offset correction bolt.

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