Construction method for sealing leakage of inner seal of main drive of shield machine

Abstract

The present invention relates to a shield machine main drive inner seal leakage plugging construction method, belonging to the shield machine maintenance field, the present invention adjusts the relative position of the inner seal and the wear-resistant ring by lifting bolts and adds a temporary seal in the gap of the adjusted wear-resistant ring to plug the shield machine main drive seal leakage. Compared with the traditional replacement of the main drive inner seal to repair the leakage, the present method has the advantages of short maintenance cycle, low construction cost, simple operation, etc.

Description

Technical Field

[0001] The invention belongs to the field of shield machine maintenance, and in particular relates to a construction method for sealing leakage of a main drive inner seal of a shield machine. Background Art

[0002] With the rapid development of urban subway projects, shield construction is increasingly being used in subway tunnels. In shield construction, the main drive of the shield machine is the core component of the shield machine and is known as the "heart" of the shield machine. During construction, due to reasons such as failure to manually inject butter as required, the seal lubrication is insufficient, causing a gap between the inner seal lip and the wear-resistant ring, resulting in mud and sand entering the main drive, causing abnormal wear of the internal components of the main drive. However, during the construction process, if the main drive seal is replaced on site, not only will the construction be difficult, but it will also cause problems such as the shield machine shutting down. Summary of the invention

[0003] In order to overcome the problems existing in the background technology, the present invention provides a construction method for sealing leakage of the inner seal of the main drive of a shield machine.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A method for sealing leakage of the inner seal of a main drive of a shield machine, characterized in that it comprises the following steps:

[0006] S1, check the shield machine main drive drawings, understand the internal components of the shield machine main drive internal seal, measure the bolt hole distance and wear ring thickness on site based on the actual situation and drawings, calculate the size of the temporary sealing gasket, and make the temporary sealing gasket;

[0007] S2, loosen and remove most of the wear-resistant ring fixing bolts, leaving a few fixing bolts;

[0008] S3, use the jackscrew bolt to push out the wear-resistant ring of the loosened fixing bolt through the reserved jackscrew hole to form an installation gap;

[0009] S4, insert a temporary sealing gasket into the installation gap;

[0010] S5, use fixing bolts to fix the inserted temporary sealing gasket and the wear-resistant ring at the position where the temporary sealing gasket is inserted. At this time, loosen the small number of fixing bolts left in step S2, use the top screw bolts to push out the wear-resistant ring, form an installation gap again, and completely insert the temporary sealing gasket into the newly formed installation gap; use fixing bolts to fix the wear-resistant ring and the temporary sealing gasket, and the plugging is completed.

[0011] Furthermore, in step S2, three adjacent fixing bolts are left and the rest are all loosened.

[0012] Furthermore, in the step S5, after the wear-resistant ring and the temporary sealing gasket are fixed with fixing bolts, the gear oil tank is cleaned 2-3 times with hydraulic oil, and then new gear oil is added.

[0013] Furthermore, the fixing bolts are (M16*85-10.9), with a total of 24 bolts; in step S2, first use hexagonal bolts (M16*100-10.9) to replace the three adjacent fixing bolts as the remaining parts, and then remove the remaining 21 fixing bolts.

[0014] Furthermore, the hydraulic oil used for cleaning is Shell 68# hydraulic oil.

[0015] Beneficial effects of the present invention:

[0016] The main difference between this method and the existing method is that the traditional method directly replaces the main drive inner seal, while this method does not replace the main drive inner seal, but adjusts the relative position of the inner seal and the wear-resistant ring and adds a temporary seal in the gap of the wear-resistant ring after adjustment. Compared with the traditional replacement of the main drive inner seal, this method has the advantages of short maintenance cycle, low construction cost, simple operation, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the shield machine in the present invention;

[0018] Figure 2 It is a structural schematic diagram of the temporary sealing pad in the present invention.

[0019] In the figure, 1. wear-resistant ring; 2. temporary sealing gasket; 3. fixing bolt. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and beneficial effects of the present invention clearer, the following will be combined with the attached Figure 1-2 The preferred embodiments of the present invention are described in detail to facilitate understanding by technicians.

[0021] Embodiment, a shield machine main drive internal seal leakage plugging construction method, comprising the following steps:

[0022] S1, check the shield machine main drive drawing, understand the internal components of the shield machine main drive seal, measure the bolt hole distance and the thickness of the wear-resistant ring 1 on site in combination with the actual situation on site and the drawings, calculate the size of the temporary sealing pad 2 and the adjustment distance of the wear-resistant ring 1, and make the temporary sealing pad 2;

[0023] S2, the fixing bolts 3 of the wear-resistant ring 1 are (M16*85-10.9), with a total of 24 bolts; first use hexagonal bolts (M16*100-10.9) to replace the three adjacent fixing bolts 3 as the remaining part, and then remove the remaining 21 fixing bolts 3. The three adjacent fixing bolts 3 left can then be more convenient to push out the wear-resistant ring 1 while preventing the wear-resistant ring 1 from moving as a whole, which is convenient for the later fixation and restoration of the wear-resistant ring 1.

[0024] S3, use the top screw bolt to push out the wear-resistant ring 1 of the loosened fixing bolt 3 through the reserved top screw hole to form an installation gap; the width of the installation gap is about 22mm larger than the temporary sealing gasket, which is convenient for the insertion and installation of the temporary sealing gasket 2.

[0025] S4, inserting a temporary sealing gasket 2 into the installation gap;

[0026] S5, use the fixing bolts 3 to fix the inserted temporary sealing gasket 2 and the wear-resistant ring 1 at the position where the temporary sealing gasket 2 is inserted. At this time, loosen the small part of the fixing bolts 3 left in step S2, use the top screw bolts to push out the wear-resistant ring 1, form the installation gap again, and completely insert the temporary sealing gasket 2 into the installation gap formed again; use the fixing bolts 3 to fix the wear-resistant ring 1 and the temporary sealing gasket 2, and then use hydraulic oil to clean the gear oil tank 2-3 times, and then add new gear oil to complete the plugging. After the seal fails, muddy water may enter the main drive seal. Using hydraulic oil to clean can ensure internal cleanliness. The hydraulic oil is preferably 68# hydraulic oil.

[0027] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A method for sealing leakage in the main drive of a shield machine, characterized in that: The following steps are involved: S1, check the shield machine main drive drawings, understand the internal components of the shield machine main drive internal seal, measure the bolt hole distance and wear ring thickness on site based on the actual situation and drawings, calculate the size of the temporary sealing gasket, and make the temporary sealing gasket; S2, loosen and remove most of the wear-resistant ring fixing bolts, leaving a few fixing bolts; S3, use the jackscrew bolt to push out the wear-resistant ring of the loosened fixing bolt through the reserved jackscrew hole to form an installation gap; S4, insert a temporary sealing gasket into the installation gap; S5. Use fixing bolts to fix the inserted temporary sealing gasket and the wear-resistant ring located at the position where the temporary sealing gasket is inserted. At this time, loosen the small number of fixing bolts left in step S2, use the push-thread bolts to push out the wear-resistant ring, and form an installation gap again. Insert the temporary sealing gasket completely into the installation gap formed again; use fixing bolts to fix the wear-resistant ring and the temporary sealing gasket to complete the sealing.

2. The shield machine main drive internal seal leakage plugging construction method according to claim 1 is characterized by: In step S2, three adjacent fixing bolts are left and the rest are all loosened.

3. The shield machine main drive internal seal leakage plugging construction method according to claim 1 is characterized by: In the step S5, after the wear-resistant ring and the temporary sealing gasket are fixed with fixing bolts, the gear oil tank is cleaned 2-3 times with hydraulic oil, and then new gear oil is added.

4. The shield machine main drive internal seal leakage plugging construction method according to claim 2 is characterized by: The fixing bolts have a specification of M16*85 and a strength grade of 10.9, with a total of 24 bolts. In step S2, first use hexagonal bolts with a specification of M16*100 and a strength grade of 10.9 to replace the three adjacent fixing bolts as the remaining parts, and then remove the remaining 21 fixing bolts.

5. The shield machine main drive internal seal leakage plugging construction method according to claim 3 is characterized by: The hydraulic oil used for cleaning is Shell 68# hydraulic oil.

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