A rotating waveguide mounting mechanism for microwave-assisted TBM rock breaking

Abstract

A rotating waveguide carrying mechanism for microwave-assisted TBM rock breaking can provide safety protection for the carried rotating waveguide, and can effectively ensure the microwave transmission reliability and stability of the rotating waveguide. The first carrying sleeve of the carrying mechanism is coaxially fixedly connected with the second carrying sleeve, the third carrying sleeve is rotatably connected with the second carrying sleeve through a friction-reducing bearing, and the carrying support plate is fixedly arranged at the front end of the third carrying sleeve; the rotating waveguide is coaxially sleeved on the inner side of the carrying mechanism, the microwave receiving end of the rotating waveguide is used to access the microwave generating part of the microwave-assisted rock breaking equipment, and the microwave output end of the rotating waveguide is used to access the rock fracturing part of the microwave-assisted rock breaking equipment; a positioning card hole is opened in the center of the carrying support plate, and the microwave output end of the rotating waveguide is fixedly engaged with the positioning card hole in the center of the carrying support plate; the first carrying sleeve is fixedly connected to the TBM front shield through an adapter ear seat; the third carrying sleeve is fixedly connected to the TBM cutter head through an adapter ear seat.

Description

Technical Field

[0001] The present invention belongs to the technical field of microwave-assisted rock breaking, and particularly relates to a rotating waveguide mounting mechanism for microwave-assisted TBM rock breaking. Background Art

[0002] With the rapid development of tunnel and underground engineering construction technologies, TBM (Tunnel Boring Machine) has been widely used in hard rock tunnel construction. However, during the construction of hard rock tunnels, TBM cutters need to bear large loads and impacts, which easily leads to severe wear of TBM cutters. Severely worn TBM cutters will seriously affect the tunneling construction. Therefore, it is necessary to suspend the TBM for cutter replacement, but the cutter replacement is very time-consuming and laborious, taking up a large amount of operation time, not only reducing the tunnel construction efficiency but also further increasing the tunnel construction cost.

[0003] Currently, the microwave-assisted rock breaking technology has gradually emerged. Using microwave-assisted rock breaking equipment can quickly heat the rock, and by means of thermal stress, initiate and expand microcracks inside the rock, ultimately achieving a reduction in the strength of the rock. Therefore, by adopting the microwave-assisted rock breaking technology, the rock breaking efficiency during tunnel construction can be improved, the equipment loss of the TBM can be reduced, and the tunnel construction cost can also be reduced.

[0004] However, during the construction process, the TBM cutter head needs to rotate continuously, but the front shield of the TBM does not rotate. The microwave generating part of the microwave-assisted rock breaking equipment needs to be installed on the non-rotating front shield of the TBM, and the rock fracturing part of the microwave-assisted rock breaking equipment needs to be installed on the continuously rotating TBM cutter head. Therefore, to mount the microwave-assisted rock breaking equipment on the TBM, it is necessary to solve the microwave conduction connection problem between the microwave generating part and the rock fracturing part of the microwave-assisted rock breaking equipment. Therefore, a rotating waveguide is required, but there is no experience to follow on how to ensure the reliability and stability of the microwave transmission of the rotating waveguide, and the reliability and stability of the microwave transmission of the rotating waveguide must be ensured. Otherwise, the application of the microwave-assisted rock breaking technology to the TBM can only remain in the theoretical concept stage. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the present invention provides a rotating waveguide mounting mechanism for microwave-assisted TBM rock breaking, which can effectively ensure the reliability and stability of the microwave transmission of the rotating waveguide, and provide technical support for the application of the microwave-assisted rock breaking technology to the TBM and its entry into the practical application stage.

[0006] To achieve the above object, the present invention adopts the following technical solution: A rotary waveguide mounting mechanism for microwave-assisted TBM rock breaking, comprising a first mounting sleeve, a second mounting sleeve, a third mounting sleeve, a mounting support plate, a first antifriction bearing, a second antifriction bearing, a first bearing support and limit sleeve, a second bearing support and limit sleeve, an annular bearing gland, a first adapter flange ring and a second adapter flange ring; the first adapter flange ring is coaxially welded and fixedly installed inside the front end opening of the first mounting sleeve, the second adapter flange ring is located outside the front end opening of the first mounting sleeve, and the second adapter flange ring is coaxially screwed and fixedly connected to the first adapter flange ring; the rear end opening of the second mounting sleeve is coaxially screwed and fixedly connected to the second adapter flange ring; the first antifriction bearing is located inside the rear end opening of the second mounting sleeve, and the outer ring of the first antifriction bearing is interference-fitted with the inner surface of the second mounting sleeve; the first bearing support and limit sleeve is arranged between the outer ring of the first antifriction bearing and the second adapter flange ring; the second antifriction bearing is located inside the front end opening of the second mounting sleeve, and the outer ring of the second antifriction bearing is interference-fitted with the inner surface of the second mounting sleeve; the third mounting sleeve is coaxially sleeved inside the second mounting sleeve, and the first antifriction bearing and the second antifriction bearing are located between the second mounting sleeve and the third mounting sleeve; the inner ring of the first antifriction bearing is interference-fitted with the outer surface of the third mounting sleeve, and the inner ring of the second antifriction bearing is interference-fitted with the outer surface of the third mounting sleeve; the second bearing support and limit sleeve is arranged between the inner ring of the first antifriction bearing and the inner ring of the second antifriction bearing; the annular bearing gland is located outside the rear end opening of the third mounting sleeve, and the annular bearing gland is coaxially screwed and fixedly connected to the rear end opening of the third mounting sleeve, and the annular bearing gland abuts against the inner ring of the first antifriction bearing; the mounting support plate is located inside the front end opening of the third mounting sleeve, and the mounting support plate is coaxially screwed and fixedly connected to the front end opening of the third mounting sleeve.

[0007] The rotary waveguide is coaxially sleeved inside the mounting mechanism. The microwave receiving end of the rotary waveguide is used to access the microwave generating part of the microwave-assisted rock breaking equipment, and the microwave output end of the rotary waveguide is used to access the rock cracking part of the wave-assisted rock breaking equipment.

[0008] A positioning card hole is provided at the center of the mounting support plate, and the microwave output end of the rotary waveguide is fixedly clamped and fitted with the positioning card hole at the center of the mounting support plate.

[0009] A plurality of first adapter lugs are fixedly arranged on the outer surface of the first mounting sleeve in the circumferential direction, and the first mounting sleeve is fixedly connected to the TBM front shield through the first adapter lugs.

[0010] A plurality of second adapter lugs are fixedly arranged on the outer surface of the third mounting sleeve in the circumferential direction, and the third mounting sleeve is fixedly connected to the TBM cutter head through the second adapter lugs.

[0011] Advantages of the present invention:

[0012] The rotating waveguide mounting mechanism for microwave-assisted TBM rock breaking of the present invention can effectively ensure the reliability and stability of microwave transmission of the rotating waveguide, and provide technical support for the application of microwave-assisted rock breaking technology to TBM and its entry into the actual application stage. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of a rotating waveguide mounting mechanism (when the rotating waveguide is mounted) for microwave-assisted TBM rock breaking of the present invention;

[0014] Figure 2 It is a schematic structural diagram of a microwave-assisted rock breaking TBM adopting the rotating waveguide mounting mechanism;

[0015] In the figure, 1 - the first mounting sleeve, 2 - the second mounting sleeve, 3 - the third mounting sleeve, 4 - the mounting support plate, 5 - the first antifriction bearing, 6 - the second antifriction bearing, 7 - the first bearing support limiting sleeve, 8 - the second bearing support limiting sleeve, 9 - the annular bearing gland, 10 - the first adapter flange ring, 11 - the second adapter flange ring, 12 - the rotating waveguide, 13 - the first adapter ear seat, 14 - the second adapter ear seat, I - the mounting mechanism, II - the microwave generating part, III - the rock fracturing part. Detailed Embodiment

[0016] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0017] As Figure 1 、 2As shown in the figure, a rotating waveguide mounting mechanism for microwave-assisted TBM rock breaking includes a first mounting sleeve 1, a second mounting sleeve 2, a third mounting sleeve 3, a mounting support plate 4, a first antifriction bearing 5, a second antifriction bearing 6, a first bearing support and limit sleeve 7, a second bearing support and limit sleeve 8, an annular bearing gland 9, a first adapter flange ring 10 and a second adapter flange ring 11. The first adapter flange ring 10 is coaxially welded and fixedly installed inside the front end opening of the first mounting sleeve 1. The second adapter flange ring 11 is located outside the front end opening of the first mounting sleeve 1, and the second adapter flange ring 11 is coaxially screwed and fixedly connected to the first adapter flange ring 10. The rear end opening of the second mounting sleeve 2 is coaxially screwed and fixedly connected to the second adapter flange ring 11. The first antifriction bearing 5 is located inside the rear end opening of the second mounting sleeve 2, and the outer ring of the first antifriction bearing 5 is in interference fit with the inner surface of the second mounting sleeve 2. The first bearing support and limit sleeve 7 is arranged between the outer ring of the first antifriction bearing 5 and the second adapter flange ring 11. The second antifriction bearing 6 is located inside the front end opening of the second mounting sleeve 2, and the outer ring of the second antifriction bearing 6 is in interference fit with the inner surface of the second mounting sleeve 2. The third mounting sleeve 3 is coaxially sleeved inside the second mounting sleeve 2, and the first antifriction bearing 5 and the second antifriction bearing 6 are located between the second mounting sleeve 2 and the third mounting sleeve 3. The inner ring of the first antifriction bearing 5 is in interference fit with the outer surface of the third mounting sleeve 3, and the inner ring of the second antifriction bearing 6 is in interference fit with the outer surface of the third mounting sleeve 3. The second bearing support and limit sleeve 8 is arranged between the inner ring of the first antifriction bearing 5 and the inner ring of the second antifriction bearing 6. The annular bearing gland 9 is located outside the rear end opening of the third mounting sleeve 3, and the annular bearing gland 9 is coaxially screwed and fixedly connected to the rear end opening of the third mounting sleeve 3, and the annular bearing gland 9 abuts against the inner ring of the first antifriction bearing 5. The mounting support plate 4 is located inside the front end opening of the third mounting sleeve 3, and the mounting support plate 4 is coaxially screwed and fixedly connected to the front end opening of the third mounting sleeve 3.

[0018] The rotating waveguide 12 is coaxially sleeved inside the mounting mechanism I. The microwave receiving end of the rotating waveguide 12 is used to access the microwave generating part II of the microwave-assisted rock breaking equipment, and the microwave output end of the rotating waveguide 12 is used to access the rock cracking part III of the wave-assisted rock breaking equipment.

[0019] A positioning card hole is opened at the center of the mounting support plate 4, and the microwave output end of the rotating waveguide 12 is fixedly clamped and fitted with the positioning card hole at the center of the mounting support plate 4.

[0020] A plurality of first adapter lugs 13 are fixedly arranged on the outer surface of the first mounting sleeve 1 along the circumferential direction, and the first mounting sleeve 1 is fixedly connected to the TBM front shield through the first adapter lugs 13.

[0021] A number of second adapter lugs 14 are fixedly arranged on the outer surface of the third mounting sleeve 3 in the circumferential direction, and the third mounting sleeve 3 is fixedly connected to the TBM cutter head through the second adapter lugs 14.

[0022] The following describes a usage process of the present invention with reference to the accompanying drawings:

[0023] In this embodiment, both the first antifriction bearing 5 and the second antifriction bearing 6 adopt constant-section thin-wall four-point contact ball bearings; the first mounting sleeve 1, the second mounting sleeve 2, the third mounting sleeve 3, the mounting support plate 4, the first bearing support limiting sleeve 7, the second bearing support limiting sleeve 8, the annular bearing gland 9, the first adapter flange ring 10 and the second adapter flange ring 11 are all made of cemented carbide materials.

[0024] When the rotating waveguide mounting mechanism of the present invention is installed on the microwave-assisted rock-breaking TBM, during the tunneling construction process, the rotational movement of the TBM cutter head will be synchronously transmitted to the third mounting sleeve 3, and the third mounting sleeve 3 realizes synchronous rotation by means of the first antifriction bearing 5 and the second antifriction bearing 6. As the third mounting sleeve 3 rotates, it will drive the mounting support plate 4 to rotate synchronously, and finally the front half of the waveguide of the rotating waveguide 12 is driven to rotate by the mounting support plate 4. Since the rock fracturing part III of the wave-assisted rock-breaking equipment rotates synchronously with the TBM cutter head, at this time, the front half of the rotating waveguide 12 rotates relative to the rotating rock fracturing part III of the wave-assisted rock-breaking equipment and remains relatively stationary.

[0025] In the rotating waveguide mounting mechanism of the present invention, except that the third mounting sleeve 3 rotates synchronously with the TBM cutter head, other components are all relatively stationary with respect to the TBM front shield. During the tunneling construction process, the internal rotating waveguide 12 is directly protected by the mounting mechanism, thereby effectively ensuring the reliability and stability of the microwave transmission of the rotating waveguide 12.

[0026] The solutions in the embodiments are not intended to limit the patent protection scope of the present invention. Any equivalent implementation or modification without departing from the present invention is included in the patent scope of this case.

Claims

1. A rotary waveguide mounting mechanism for microwave-assisted TBM rock breaking, characterized in that: It includes a first mounting sleeve, a second mounting sleeve, a third mounting sleeve, a mounting support plate, a first antifriction bearing, a second antifriction bearing, a first bearing support and limit sleeve, a second bearing support and limit sleeve, an annular bearing gland, a first adapter flange ring and a second adapter flange ring; the first adapter flange ring is coaxially welded and fixedly installed inside the front end barrel of the first mounting sleeve, the second adapter flange ring is located outside the front end barrel of the first mounting sleeve, and the second adapter flange ring is coaxially screwed and fixedly connected with the first adapter flange ring; the rear end barrel of the second mounting sleeve is coaxially screwed and fixedly connected with the second adapter flange ring; the first antifriction bearing is located inside the rear end barrel of the second mounting sleeve, and the outer ring of the first antifriction bearing is in interference fit with the inner surface of the second mounting sleeve; the first bearing support and limit sleeve is arranged between the outer ring of the first antifriction bearing and the second adapter flange ring; the second antifriction bearing is located inside the front end barrel of the second mounting sleeve, and the outer ring of the second antifriction bearing is in interference fit with the inner surface of the second mounting sleeve; the third mounting sleeve is coaxially sleeved inside the second mounting sleeve, and the first antifriction bearing and the second antifriction bearing are located between the second mounting sleeve and the third mounting sleeve; the inner ring of the first antifriction bearing is in interference fit with the outer surface of the third mounting sleeve, and the inner ring of the second antifriction bearing is in interference fit with the outer surface of the third mounting sleeve; the second bearing support and limit sleeve is arranged between the inner ring of the first antifriction bearing and the inner ring of the second antifriction bearing; the annular bearing gland is located outside the rear end barrel of the third mounting sleeve, and the annular bearing gland is coaxially screwed and fixedly connected with the rear end barrel of the third mounting sleeve, and the annular bearing gland abuts against the inner ring of the first antifriction bearing; the mounting support plate is located inside the front end barrel of the third mounting sleeve, and the mounting support plate is coaxially screwed and fixedly connected with the front end barrel of the third mounting sleeve.

2. The rotary waveguide mounting mechanism for microwave-assisted TBM rock breaking according to claim 1, characterized in that: The rotary waveguide is coaxially sleeved inside the mounting mechanism. The microwave receiving end of the rotary waveguide is used to access the microwave generating part of the microwave-assisted rock breaking equipment, and the microwave output end of the rotary waveguide is used to access the rock cracking part of the wave-assisted rock breaking equipment.

3. The rotary waveguide mounting mechanism for microwave-assisted TBM rock breaking according to claim 1, characterized in that: A positioning card hole is provided at the center of the mounting support plate, and the microwave output end of the rotary waveguide is fixedly clamped and fitted with the positioning card hole at the center of the mounting support plate.

4. The rotary waveguide mounting mechanism for microwave-assisted TBM rock breaking according to claim 1, characterized in that: A plurality of first adapter lugs are fixedly arranged on the outer surface of the first mounting sleeve in the circumferential direction, and the first mounting sleeve is fixedly connected with the TBM front shield through the first adapter lugs.

5. The rotary waveguide mounting mechanism for microwave-assisted TBM rock breaking according to claim 1, characterized in that: A number of second adapter lugs are fixedly arranged on the outer surface of the third mounting sleeve along the circumferential direction, and the third mounting sleeve is fixedly connected with the TBM cutter head through the second adapter lugs.

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