Microwave radiator for microwave mechanical rock breaking device

Abstract

The utility model belongs to the technical field of geotechnical engineering and tunnel engineering, and particularly relates to a microwave radiator for a microwave mechanical rock breaking device, which comprises a rigid microwave radiator, a vibration reduction system and a dustproof and flying rock prevention system, the rigid microwave radiator is provided with a dustproof and anti-flying-stone system and a vibration reduction system, the vibration reduction system comprises a flexible waveguide, a flexible vibration reduction sleeve and a rigid vibration reduction sleeve, the end part of a standard waveguide section of the rigid microwave radiator is connected with the flexible waveguide, the end part of a transition section of the rigid microwave radiator is connected with the flexible vibration reduction sleeve, and the flexible vibration reduction sleeve is connected with the rigid vibration reduction sleeve. A rigid vibration reduction sleeve is arranged above the flexible vibration reduction sleeve, the dustproof flying stone prevention system comprises an outer baffle and a dustproof block, the outer baffle is arranged on the outer side of a transition section of the rigid microwave radiator and fixed to the flexible vibration reduction sleeve, and the dustproof block is placed in a standard waveguide section of the rigid microwave radiator and fixed to the flexible vibration reduction sleeve. According to the microwave radiator provided by the utility model, the measures of vibration reduction, dust prevention and flying stone prevention are adopted, so that the safe operation of a microwave source in a vibration and dust environment is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical fields of geotechnical engineering and tunnel engineering, and particularly relates to a microwave radiator for a microwave mechanical rock-breaking device. Background Technique

[0002] In tunnel construction, the drill-blasting method and the mechanical method are currently common excavation means. Among them, the mechanical method has the advantages of high tunneling efficiency and small disturbance to the surrounding rock compared with the drill-blasting method. However, when mechanical cutters encounter hard rocks, problems such as inability to dig and severe tool wear will occur, which will seriously affect the construction progress and increase the construction cost.

[0003] Microwave technology can effectively crack rocks and reduce their strength, facilitating subsequent mechanical cutting. Combining microwave with mechanical devices has good application prospects. Currently, common indoor microwave devices can be divided into cavity type and open type. Among them, the open-type microwave device is suitable for combination with a mechanical rock-breaking device and on-site application. The open-type microwave radiator is usually open, and there is no obstruction at the front end of the radiator. There are interference factors such as vibration, dust, and flying stones in the construction environment of the mechanical rock-breaking device. Flying stones and dust are easy to enter the microwave radiator, causing a sparking fault, which will damage the microwave device. In addition, both the microwave radiator and the cutter head part are rigid bodies and are connected. The vibration of the cutter head will be transmitted to the microwave device through the waveguide, damaging devices such as microwave magnetrons. Therefore, it is necessary to develop a microwave radiator that can prevent vibration, dust, and flying stones.

[0004] The Chinese patent "CN201710382980.X A Microwave Focusing Radiator for Rock Surface Fracture" invented a microwave focusing radiator for rock surface fracture, including a standard waveguide section, an impedance matching section, and a compression radiation section. The standard waveguide section is used to access the microwave emitted by the microwave source, and the standard waveguide section is connected to the compression radiation section through the impedance matching section; the impedance matching section forms impedance matching between the standard waveguide section and the compression radiation section, and the compression radiation section radiates the focused microwave outward.

[0005] The Chinese patent "CN111163545B A Metal Lens Antenna Microwave Radiation Device for Hard Rock Tunnel Excavation" invented a metal lens antenna microwave radiation device for hard rock tunnel excavation, which includes a universal mobile platform vehicle, a microwave power supply, a microwave generator, a connecting waveguide, a flared horn antenna, a metal lens antenna, a shielding box, a laser displacement sensor, an infrared thermal imager, etc. The microwave power supply is connected to the microwave generator through a power connection line. The microwave generator is connected to the flared horn antenna through a connecting waveguide and a flange. The laser displacement sensor and the infrared thermal imager are fixed on the shielding box. The flared horn antenna, the metal lens antenna, and the shielding box are fixed on the universal mobile platform vehicle. The microwave generated by the microwave generator is focused on the tunnel face through the metal lens antenna. By adjusting the position and height of the universal mobile platform vehicle, the metal lens antenna microwave radiation device acts on the pre-set heating points on the tunnel face, realizing the efficient and economical excavation of hard rock tunnels.

[0006] The solutions of the above two patents are both for focusing microwave energy and improving the microwave utilization efficiency. During the mechanical rock breaking process, the microwave radiator is in an environment of dust, flying stones, and vibration, and these situations are not considered in the above patents. Utility Model Content

[0007] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to design a microwave radiator that can prevent vibration, dust, and flying stones, ensuring the safety and stability of microwave equipment in the on-site mechanical rock breaking environment.

[0008] A microwave radiator for a microwave mechanical rock breaking device includes a rigid microwave radiator, a vibration damping system, and a dust and flying stone prevention system. The rigid microwave radiator is provided with a dust and flying stone prevention system and a vibration damping system. The vibration damping system includes a flexible waveguide, a flexible vibration damping sleeve, and a rigid vibration damping sleeve. The end of the standard waveguide section of the rigid microwave radiator is connected to a flexible waveguide. The end of the transition section of the rigid microwave radiator is connected to a flexible vibration damping sleeve, and a rigid vibration damping sleeve is arranged above the flexible vibration damping sleeve.

[0009] The dust and flying stone prevention system includes an outer baffle and a dust prevention block. The outer baffle is arranged on the outside of the transition section of the rigid microwave radiator and fixed on the flexible vibration damping sleeve. The dust prevention block is placed in the standard waveguide section of the rigid microwave radiator.

[0010] The end of the transition section of the rigid microwave radiator is provided with an outer eaves, which is parallel to the outer baffle. The flexible vibration damping sleeve is provided with two grooves, and the outer eaves and the outer baffle are respectively fixed in the grooves.

[0011] The flexible vibration damping sleeve is made of a high-damping, microwave non-absorbing, and high-temperature resistant material.

[0012] The rigid vibration damping sleeve comprises a rigid vibration damping sleeve outer frame, a rigid vibration damping sleeve inner frame and a vibration damper. The vibration damper is located between the rigid vibration damping sleeve inner frame and the rigid vibration damping sleeve outer frame. The vibration damper is symmetrically distributed up and down and left and right. The rigid vibration damping sleeve inner frame is connected to the flexible vibration damping sleeve.

[0013] The outer baffle is made of a non-microwave absorbing and impact-resistant material. The length of the outer baffle is the distance between the outer edges on both sides of the transition section end surface of the rigid microwave radiator. The thickness of the outer baffle is 2-4 mm.

[0014] The dust block is made of a non-microwave absorbing and impact-resistant material, and its cross-sectional dimensions are the same as those of a standard waveguide section of a rigid microwave radiator. Its thickness is greater than 2 cm and is less than the width of a standard waveguide section of a rigid microwave radiator.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model is provided with a vibration reduction system, which can reduce the vibration transmitted to the rigid microwave radiator by the machine through the arrangement of a flexible vibration reduction sleeve and a rigid vibration reduction sleeve, and reduce the vibration transmitted from the rigid microwave radiator to the microwave source through a flexible waveguide; the utility model is provided with a dust and flying stone prevention system, which adopts a two-stage protection method, and an outer baffle is installed in the flexible vibration reduction sleeve as a first protection measure, which mainly prevents ejected rock chips from entering the rigid microwave radiator and blocks most of the dust; a dust block is built into the standard waveguide section of the rigid microwave radiator as a second protection measure, which can block the dust from continuing to spread to the microwave source, and can also serve as a guarantee when the first layer of protection is penetrated; the microwave radiator of the utility model adopts vibration reduction, dust prevention and flying stone prevention measures, which ensure the safe operation of the microwave source in a vibration and dust environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a microwave radiator for a microwave mechanical rock breaking device of the utility model;

[0018] Figure 2 for Figure 1 AA section view;

[0019] Figure 3 for Figure 1 Middle BB section view;

[0020] Figure 4 This is a schematic diagram of the structure of the microwave radiator of the utility model installed on the TBM cutterhead;

[0021] In the attached figure: 1. flexible waveguide; 2. rigid microwave radiator; 3. flexible vibration damping sleeve; 4. outer baffle; 5. inner frame of rigid vibration damping sleeve; 6. vibration damper; 7. outer frame of rigid vibration damping sleeve; 8. dust block; 9. outer eaves. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by terms such as "inner side", "outer side", "left side", "right side", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0025] As Figures 1 to 3 shown, the present invention provides a microwave radiator for a microwave mechanical rock-breaking device, including a rigid microwave radiator 2, a vibration damping system, and a dust and flying rock prevention system; the rigid microwave radiator 2 is provided with a dust and flying rock prevention system and a vibration damping system. The vibration damping system includes a flexible waveguide 1, a flexible vibration damping sleeve 3, and a rigid vibration damping sleeve. One end of the standard waveguide section of the rigid microwave radiator 2 is connected to the flexible waveguide 1, one end of the transition section of the rigid microwave radiator 2 is connected to the flexible vibration damping sleeve 3, and a rigid vibration damping sleeve is provided above the flexible vibration damping sleeve 3.

[0026] In order to reduce the influence of the vibration of the mechanical rock-breaking device on the microwave source, it starts from two aspects: reducing the vibration transmitted from the machine to the rigid microwave radiator and reducing the vibration transmitted from the rigid microwave radiator to the microwave source;

[0027] The flexible vibration damping sleeve 3 is connected to the rigid microwave radiator 2, and the rigid vibration damping sleeve is connected to the outside of the flexible vibration damping sleeve 3 to reduce the vibration transmitted from the mechanical rock-breaking device to the rigid microwave radiator 2;

[0028] The left side of the flexible waveguide 1 is connected to the microwave input end, and the right side is connected to the rigid microwave radiator 2 to reduce the vibration transmitted from the rigid microwave radiator 2 to the microwave source. In this embodiment, the internal metal material of the flexible waveguide 1 is copper, and the external material is rubber.

[0029] The dust and flying stone prevention system includes an outer baffle 4 and a dust block 8. The outer baffle 4 is arranged on the outside of the transition section of the rigid microwave radiator 2 and fixed on the flexible vibration damping sleeve 3. The dust block 8 is placed in the standard waveguide section of the rigid microwave radiator 2. The outer baffle 4 is made of a microwave-non-absorbing and impact-resistant material. The length of the outer baffle 4 is the distance between the outer edges 9 on both sides of the end face of the transition section of the rigid microwave radiator 2. The thickness of the outer baffle 4 is 2 to 4 mm. The dust block 8 is made of a microwave-non-absorbing and impact-resistant material. The cross-sectional dimensions are the same as those of the standard waveguide section of the rigid microwave radiator. Its thickness is greater than 2 cm and less than the width of the standard waveguide section.

[0030] In order to avoid dust and flying stones causing ignition failure of the microwave magnetron during microwave radiation, a two-stage protection method is adopted. The outer baffle 4 is installed in the flexible vibration-damping sleeve 3 as the first protection measure, mainly to prevent the ejected rock pieces from entering the rigid microwave radiator 2 and block most of the dust; the standard waveguide section of the rigid microwave radiator 2 has a built-in dust block 8 as the second protection measure, which can prevent the dust from continuing to spread to the microwave source, and also serve as a guarantee when the first layer of protection is penetrated. In this embodiment, the dust block 8 is made of polytetrafluoroethylene material, and its cross-sectional size is the same as the standard waveguide section size of the rigid microwave radiator 2, and its thickness is one quarter of the microwave wavelength; the outer baffle 4 is made of muscovite mica, and its length and width are equal to the distance between the outer edges of the two sides of the microwave radiator, and its thickness is 2mm.

[0031] An outer flange 9 is provided at the end of the transition section of the rigid microwave radiator 2, and the outer flange 9 is parallel to the outer baffle 4. The flexible vibration damping sleeve 3 is provided with two grooves, and the outer flange 9 and the outer baffle 4 are respectively fixed in the grooves. In this embodiment, the rigid microwave radiator 2 and its outer flange 9 are both made of metal aluminum.

[0032] The flexible vibration damping sleeve 3 is a high-damping, microwave-non-absorbing, high-temperature resistant material. In this embodiment, the flexible vibration damping sleeve 3 is a high-temperature resistant rubber material, and its inner shape depends on the cross-sectional shape of the rigid microwave radiator 2. It can wrap the outer baffle plate 4 and the outer edge 9 of the rigid microwave radiator, thereby reducing the vibration transmitted by the mechanical rock breaking device, absorbing part of the impact energy received by the outer baffle plate 4 and fixing the outer baffle plate 4.

[0033] The rigid vibration damping sleeve comprises a rigid vibration damping sleeve outer frame 7, a rigid vibration damping sleeve inner frame 5, and a vibration damper 6. The vibration damper 6 is located in the middle of the rigid vibration damping sleeve inner frame 5 and the rigid vibration damping sleeve outer frame 7, and is symmetrically distributed up and down and left and right. The rigid vibration damping sleeve inner frame 5 is connected to the flexible vibration damping sleeve 3. The shape of the rigid vibration damping sleeve inner frame 5 depends on the shape of the outer side of the flexible vibration damping sleeve. The rigid vibration damping sleeve plays a role in reducing the vibration transmitted from the mechanical rock breaking device to the rigid microwave radiator 2. In this embodiment, the inner and outer frames are both made of metal materials, and the vibration damper 6 is an existing vibration damping device.

[0034] The following is a description of the one-time use process of the utility model in conjunction with the accompanying drawings:

[0035] First, install the dust-proof block 8 in the standard waveguide section of the rigid microwave radiator 2, then install the flexible vibration damping sleeve 3 on the outer eaves 9 of the microwave radiator, and at the same time install the outer baffle 4 in the flexible vibration damping sleeve 3. Immediately connect the left side of the flexible waveguide 1 section to the microwave input end and the right side to the rigid microwave radiator 2. Finally, connect the inner frame 5 of the rigid vibration damping sleeve to the outside of the flexible vibration damping sleeve 3, and connect the outer frame 7 of the rigid vibration damping sleeve to the mechanical rock-breaking device; as Figure 4 shown, during the rock-breaking process of the mechanical cutter, the falling rock blocks will be blocked by the outer baffle 4, the microwave can pass through the outer baffle and be absorbed by the rock, the vibration of the mechanical rock-breaking device will be absorbed by the rigid vibration damping sleeve and the flexible vibration damping sleeve 3, and the vibration transmitted by the rigid microwave radiator 2 will be absorbed by the flexible waveguide 1. If the vibration of the mechanical rock-breaking device is not obvious, the flexible waveguide 1 and the rigid vibration damping sleeve can be removed in sequence.

[0036] The solutions in the examples are not intended to limit the patent protection scope of the present invention. Any equivalent implementation or modification without departing from the present invention shall be included in the patent scope of this case.

Claims

1. A microwave radiator for a microwave mechanical rock-breaking device, characterized in that, It includes a rigid microwave radiator, a vibration damping system, and a dust and flying rock prevention system; the rigid microwave radiator is provided with a dust and flying rock prevention system and a vibration damping system. The vibration damping system includes a flexible waveguide, a flexible vibration damping sleeve, and a rigid vibration damping sleeve. The end of the standard waveguide section of the rigid microwave radiator is connected to the flexible waveguide, the end of the transition section of the rigid microwave radiator is connected to the flexible vibration damping sleeve, and the rigid vibration damping sleeve is arranged above the flexible vibration damping sleeve.

2. The microwave radiator for a microwave mechanical rock-breaking device according to claim 1, characterized in that The dust and flying rock prevention system includes an outer baffle and a dust prevention block. The outer baffle is arranged on the outside of the transition section of the rigid microwave radiator and fixed on the flexible vibration damping sleeve, and the dust prevention block is placed in the standard waveguide section of the rigid microwave radiator.

3. A microwave radiator for a microwave mechanical rock-breaking device according to claim 2, characterized in that, The end of the transition section of the rigid microwave radiator is provided with an outer eaves, the outer eaves is parallel to the outer baffle, the flexible vibration damping sleeve is provided with two grooves, and the outer eaves and the outer baffle are respectively fixed in the grooves.

4. The microwave radiator for a microwave mechanical rock-breaking device according to claim 1, characterized in that, The flexible vibration damping sleeve is made of a high-damping, microwave non-absorbing, and high-temperature resistant material.

5. A microwave radiator for a microwave mechanical rock-breaking device according to claim 1, characterized in that, The rigid vibration damping sleeve includes a rigid vibration damping sleeve outer frame, a rigid vibration damping sleeve inner frame, and shock absorbers. The shock absorbers are located in the middle of the rigid vibration damping sleeve inner frame and the rigid vibration damping sleeve outer frame, and the shock absorbers are symmetrically distributed up, down, left, and right. The rigid vibration damping sleeve inner frame is connected to the flexible vibration damping sleeve.

6. A microwave radiator for a microwave mechanical rock-breaking device according to claim 2, characterized in that, The outer baffle is made of a microwave non-absorbing and impact-resistant material. The length of the outer baffle is the distance between the outer eaves on both sides of the end face of the transition section of the rigid microwave radiator, and the thickness of the outer baffle is 2-4 mm.

7. A microwave radiator for a microwave mechanical rock-breaking device according to claim 2, characterized in that, The dust prevention block is made of a microwave non-absorbing and impact-resistant material. The cross-sectional size is the same as that of the standard waveguide section of the rigid microwave radiator, and its thickness is greater than 2 cm and less than the width of the standard waveguide section of the rigid microwave radiator.

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