Microwave irradiation cracking device for engineering hard surrounding rock

Abstract

The utility model provides a microwave irradiation cracking device for engineering hard surrounding rock, which is arranged on a mechanical arm of tunneling equipment, and a tuner is correspondingly connected with a microwave output end of a microwave generator and is used for adjusting microwave phase and amplitude; the waveguide tube is correspondingly connected to the tuner and is used for transmitting the microwaves adjusted by the tuner; the radiator sleeves one end, far away from the tuner, of the waveguide tube and is used for focusing the microwaves transmitted by the waveguide tube to the front of the radiator; the telescoping mechanism is located between the radiator and the tuner to drive the radiator to move along the waveguide tube. The distance between the radiator and the irradiation target is optimized through the telescopic mechanism, and for a scene with distance radiation, it is ensured that the distance between the radiator and the irradiation target is appropriate, so that detuning is avoided, and reflection is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel boring equipment, and in particular relates to a microwave irradiation cracking device for engineering hard surrounding rocks. Background Art

[0002] Extensive laboratory research has been conducted on microwave rock breaking technology. Microwaves are absorbed within the rock mass and converted into heat energy, causing the rock's internal temperature to rise, generating thermal stress. As the temperature continues to rise and the internal temperature gradient increases, the thermal stress gradually accumulates, eventually exceeding the rock's tensile strength and causing it to fracture. However, microwave rock heating devices are currently primarily used in laboratory research. They are difficult to use at underground mine engineering sites. Furthermore, the surrounding rock types vary, and different rock types have different thermal sensitivities after microwave irradiation. Conventional microwave rock heating devices are not well suited for engineering applications involving hard surrounding rock.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art. The utility model designs a microwave irradiation cracking device for engineering hard surrounding rocks.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A microwave irradiation fracturing device for engineering hard surrounding rock, the fracturing device is arranged on a mechanical arm of a tunnel boring device, comprising:

[0007] A microwave generator, wherein the microwave generator is used to generate microwaves;

[0008] A tuner, the tuner correspondingly connected to the microwave output end of the microwave generator, for adjusting the microwave phase and amplitude;

[0009] a waveguide tube, the waveguide tube being correspondingly connected to the tuner and being used to transmit the microwaves adjusted by the tuner;

[0010] a radiator, the radiator being sleeved on an end of the waveguide away from the tuner and being used to focus the microwaves transmitted by the waveguide to the front of the radiator;

[0011] A telescopic mechanism is located between the radiator and the tuner to drive the radiator to move along the waveguide.

[0012] Preferably, the telescopic mechanism is a hollow cylinder sleeved on the outside of the waveguide tube, the cylinder body of the hollow cylinder is fixed on the housing of the tuner, and the end of the piston rod of the hollow cylinder is correspondingly connected to the radiator.

[0013] Preferably, the radiator is a hemispherical or bowl-shaped structure, a through hole corresponding to the waveguide tube is provided in the middle of the radiator, and a microwave reflecting layer is attached to the inner wall of the radiator.

[0014] Preferably, the fracturing device further comprises a feedback control system, which is correspondingly connected to the microwave generator and is used to monitor temperature changes of the tunnel face.

[0015] Preferably, the feedback control system has a monitoring module pointing to the front of the radiator, and the monitoring module is connected to the outside of the microwave generator through a connecting rod.

[0016] Preferably, both ends of the connecting rod are connected to the microwave generator and the feedback control system respectively through universal joints.

[0017] Beneficial effects: The phase and amplitude of microwaves can be precisely controlled by the tuner, and different powers of irradiation can be applied to rocks of different lithologies to achieve heating of rocks with different microwave sensitivities, reduce reflected power, improve irradiation efficiency, and achieve high-power or large-scale irradiation. During the heating process, the distance between the radiator and the irradiation target is optimized through the telescopic mechanism. For scenes with distance radiation, ensure that the distance between the radiator and the irradiation target is appropriate to avoid detuning and reduce reflection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of this application are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention.

[0019] Figure 1 This is a simplified structural diagram of the fracturing device in a specific embodiment provided by the present utility model.

[0020] In the figure: 1. Feedback control system; 2. Microwave generator; 3. Tuner; 4. Telescopic mechanism; 5. Radiator; 6. Waveguide. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0022] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0024] like Figure 1 As shown, a microwave irradiation fracturing device for engineering hard surrounding rock is integrated into the mechanical arm of tunnel boring equipment. The fracturing device can be driven by the mechanical arm according to actual needs, thereby facilitating radiation heating of the rock at the tunnel face. The fracturing device includes a microwave generator 2, a tuner 3, a waveguide 6, a radiator 5, and a telescopic mechanism 4. The microwave generator 2 is used to generate microwaves; the tuner 3 is connected to the microwave output end of the microwave generator 2. By precisely controlling the phase and amplitude of the microwaves, different powers are irradiated to different lithologies to achieve heating of the ores with different microwave sensitivities. The waveguide tube 6 is correspondingly connected to the tuner 3. The waveguide tube 6 is used to transmit the microwaves adjusted by the tuner 3. One end of the waveguide tube 6 is connected to the microwave output end, and the other end extends toward the tunnel face, thereby transmitting the microwaves to the front of the tunnel face. The radiator 5 is sleeved on the end of the waveguide tube 6 away from the tuner 3, and is used to reflect microwaves, focus the microwave energy transmitted by the waveguide tube 6 to a smaller area, and transmit the microwaves in a specified direction to the front of the radiator 5, ensuring that the distance between the radiator 5 and the irradiation target is appropriate to avoid detuning and reduce reflection. This embodiment also provides a telescopic mechanism 4, which is located between the radiator 5 and the tuner 3 to drive the radiator 5 to move along the waveguide tube 6, thereby optimizing the distance between the radiator 5 and the irradiation target and adjusting the distance between the radiator 5 and the tunnel face.

[0025] In an optional embodiment, the telescopic mechanism 4 is a hollow cylinder, and the specific structure refers to the hollow jack. The structure and principle of the hollow cylinder will not be described in detail here. The diameter of the center hole of the hollow cylinder is compatible with the diameter of the waveguide tube 6, so that it can be sleeved on the outside of the waveguide tube 6. The telescopic mechanism 4 driven by the air pump will not cause motion interference to the waveguide tube 6. In the process of the telescopic mechanism 4 driving the radiator 5 to slide along the waveguide tube 6, in the minimum stroke of the telescopic mechanism 4, the waveguide tube 6 does not extend out of the front end of the radiator 5, and in the maximum stroke of the telescopic mechanism 4, the waveguide tube 6 does not retract to the rear end of the radiator 5. The cylinder body of the hollow cylinder is fixed on the outer casing of the tuner 3, and the piston rod end of the hollow cylinder is connected to the radiator 5 by welding or bolting.

[0026] In an optional embodiment, radiator 5 is hemispherical or bowl-shaped, employing a lampshade-style focused radiator. After microwaves irradiate and break the rock, the rock receives concentrated heating, improving microwave heating efficiency. The opening of radiator 5 points toward the tunnel face, and a perforation corresponding to waveguide 6 is located in the middle of radiator 5. A microwave reflective layer is attached to the inner wall of radiator 5, allowing microwave energy to be transmitted along the direction of radiator 5 by reflection.

[0027] In an optional embodiment, to ensure accurate microwave irradiation, the fracturing device further includes a feedback control system 1, which is connected to a microwave generator 2 and is used to monitor temperature changes at the tunnel face. Specifically, by monitoring the heating rate and temperature increment in the irradiated area of ​​the tunnel face, the output power and frequency of microwave generator 2 are optimized in real time, thereby reducing power loss and ensuring optimal microwave irradiation.

[0028] In an optional embodiment, the feedback control system 1 has a monitoring module pointing directly in front of the radiator 5. The monitoring module can be an infrared temperature monitor, so that it can accurately monitor the heating rate and temperature increment of the tunnel face. The monitoring module is connected to the outside of the microwave generator 2 through a connecting rod. The monitoring end of the monitoring module points to the tunnel face. The two ends of the connecting rod are respectively connected to the microwave generator 2 and the feedback control system through a universal joint. In this way, the position and angle of the monitoring module can be adjusted according to actual needs to ensure the accuracy of monitoring.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A microwave irradiation cracking device for engineering hard surrounding rock, characterized in that: The fracturing device is arranged on a mechanical arm of a tunnel boring machine and comprises: A microwave generator, wherein the microwave generator is used to generate microwaves; A tuner, the tuner correspondingly connected to the microwave output end of the microwave generator, for adjusting the microwave phase and amplitude; a waveguide tube, the waveguide tube being correspondingly connected to the tuner and being used to transmit the microwaves adjusted by the tuner; a radiator, the radiator being sleeved on an end of the waveguide away from the tuner and being used to focus the microwaves transmitted by the waveguide to the front of the radiator; A telescopic mechanism is located between the radiator and the tuner to drive the radiator to move along the waveguide.

2. The microwave irradiation fracturing device for engineering hard surrounding rock according to claim 1, characterized in that: The telescopic mechanism is a hollow cylinder sleeved on the outside of the waveguide tube, the cylinder body of the hollow cylinder is fixed on the outer shell of the tuner, and the end of the piston rod of the hollow cylinder is correspondingly connected to the radiator.

3. The microwave irradiation fracturing device for engineering hard surrounding rock according to claim 2, characterized in that: The radiator is a hemispherical or bowl-shaped structure, a through hole corresponding to the waveguide tube is provided in the middle of the radiator, and a microwave reflecting layer is attached to the inner wall of the radiator.

4. The microwave irradiation fracturing device for engineering hard surrounding rock according to claim 1, characterized in that: The fracturing device also includes a feedback control system, which is correspondingly connected to the microwave generator and is used to monitor the temperature change of the tunnel face.

5. The microwave irradiation fracturing device for engineering hard surrounding rock according to claim 4, characterized in that: The feedback control system has a monitoring module pointing to the front of the radiator, and the monitoring module is connected to the outside of the microwave generator through a connecting rod.

6. The microwave irradiation fracturing device for engineering hard surrounding rock according to claim 5, characterized in that: The two ends of the connecting rod are respectively connected to the microwave generator and the feedback control system through universal hinge joints.

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