Microwave heating and water cooling alternate circulation rock cracking experiment device

Abstract

The utility model belongs to the technical field of rock cracking experiments, and provides a microwave heating and water cooling alternate circulation rock cracking experiment device which comprises a microwave excitation system and a rock breaking experiment device, the microwave excitation system is connected with the rock breaking experiment device; the rock breaking experiment device comprises an experiment box, a constant humidity machine and a constant temperature water tank; a reaction cavity is formed in the experiment box and communicated with the constant humidity machine and the warm water tank, a sample is placed in the reaction cavity, and the microwave excitation system is used for generating microwaves and conveying the microwaves to the sample in the reaction cavity; the constant-temperature water tank is communicated with the reaction cavity and is used for conveying cooling water into the reaction cavity after microwave irradiation; two auxiliary rock breaking technologies of microwave heating and water cooling are combined, the sample cracking efficiency can be improved, the important loading mode of microwave heating and water cooling alternate circulation loading is introduced into an indoor experiment, and the experimental device has important significance on engineering application of the microwave heating and water cooling alternate circulation rock breaking technology in the later period.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rock fracturing experiment technical field, concretely relates to a microwave heating and water cooling alternate circulation fracturing rock experiment device. BACKGROUND

[0002] Geothermal energy is widely considered as a clean renewable energy, and is an important component of clean energy in the future. However, in deep geothermal exploitation, the environment is complex, the rock hardness is high, and the density is large, which makes the rock breaking technology face great challenges. In this environment, the rock breaking efficiency of the traditional hydraulic fracturing technology is greatly reduced, and the quality and benefit of the fracture are also reduced, so a new type of high-efficiency rock breaking technology is urgently needed. Microwave rock breaking technology is considered as the development direction of future geothermal exploitation technology because of its high efficiency and no secondary pollution. However, the macroscopic physical structure evolution characteristics and mechanical degradation properties under the action of microwave heating and water cooling alternate circulation are not clear, and theoretical research is urgently needed.

[0003] In order to study the mechanism of microwave heating and water cooling alternate circulation rock breaking, the existing research has an experimental device for the damage mechanism of water-cooled rock under different high-temperature conditions and the damage mechanism of rock under different microwave power. However, as two efficient rock breaking methods, the damage mechanism of rock under the action of microwave and water cooling alternate circulation is not clear, and needs to be included in the research scope, but there is no experimental device for loading microwave heating and water cooling alternate circulation fracturing rock. Therefore, it is of great significance to design a microwave heating and water cooling alternate circulation fracturing rock experiment device for the later engineering application. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model provides a microwave heating and water cooling alternate circulation fracturing rock experiment device to solve the problems in the prior art, and the technical scheme adopted by the utility model is:

[0005] A microwave heating and water cooling alternate circulation fracturing rock experiment device, comprising a microwave excitation system and a rock breaking experiment device.

[0006] The microwave excitation system is connected to the rock breaking experiment device.

[0007] The rock breaking experiment device comprises an experiment box, a constant humidity machine and a constant temperature water tank. A reaction cavity is arranged in the experiment box, the reaction cavity is connected to the constant humidity machine and the constant temperature water tank, a sample is placed in the reaction cavity, the microwave excitation system is used to generate microwaves and deliver the microwaves to the sample in the reaction cavity, and the constant temperature water tank is connected to the reaction cavity and is used to deliver cooling water to the reaction cavity after microwave irradiation.

[0008] Further, the reaction cavity is connected to a gas tank, and the gas tank contains inert gas.

[0009] Further, the microwave excitation system comprises a microwave source bearing platform, a microwave power source and a waveguide;

[0010] The microwave power source and the microwave head are installed on the microwave source bearing platform, and the microwave head of the microwave power source is communicated with the reaction cavity through the waveguide.

[0011] Further, the waveguide comprises a straight waveguide and a bent waveguide, one end of the straight waveguide is connected with the microwave head, and the other end of the straight waveguide is communicated with the reaction cavity through the bent waveguide.

[0012] Further, the humidifying pipeline of the constant humidity machine is provided with a condensate water collecting groove.

[0013] Further, the condensate water collecting groove is communicated with a recycled water temporary storage device.

[0014] Further, a cooling water loader is further included, the cooling water loader is a hollow cylindrical structure, is fixed on the wall surface of the reaction cavity, one end of the cooling water loader is communicated with the constant temperature water tank, and the other end of the cooling water loader is communicated with the reaction cavity.

[0015] Further, an infrared temperature measuring instrument and an industrial camera are further included, and the infrared temperature measuring instrument and the industrial camera are installed on the reaction cavity.

[0016] The utility model has the following beneficial effects: the utility model combines microwave heating and water cooling two kinds of auxiliary rock breaking technologies, can improve the sample cracking efficiency, introduces the important loading mode of microwave heating and water cooling alternative circulation loading into indoor experiment, and the engineering application of the microwave heating and water cooling alternative circulation rock breaking technology in the later period has important significance. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0018] Fig. 2 It is the waveguide connection relationship schematic diagram. CONCRETE EMBODIMENT

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below, Figs. 1-2 The technical scheme in the embodiments of the utility model is described, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment, if not specially pointed out, the technical means used in the embodiment is the conventional means familiar to the person skilled in the art.

[0020] As Fig. 1 , Fig. 2The utility model relates to a kind of microwave heating and water cooling alternately circulating rock cracking experimental device, including microwave excitation system 1 and rock breaking experimental device 2;

[0021] The microwave excitation system 1 is connected to the rock breaking experimental device 2;

[0022] The rock breaking experimental device 2 includes experimental box 21, constant humidity machine 24, constant temperature water tank 25;The reaction cavity 211 is arranged in the experimental box 21, and the reaction cavity 211 is communicated with the constant humidity machine 24 and the water tank 25, and the reaction cavity 211 is used to place sample, and the microwave excitation system 1 is used to generate microwave and is delivered to the sample in the reaction cavity 211;The constant temperature water tank 25 is communicated with the reaction cavity 211, and is used to deliver cooling water into the reaction cavity 211 after microwave irradiation.

[0023] Reaction cavity 211 is provided with a bearing table for placing samples, and in addition, a switch door can be provided on the top or side of the reaction cavity 211 to facilitate the placement and removal of samples, and the switch door and the reaction cavity 211 can be sealed by a sealing ring and a sealing coating. The function of the microwave excitation system 1 is to generate microwave irradiation on the rock sample, thereby forming rock cracking. The constant temperature water tank 25 is used to introduce cooling water into the reaction cavity 211 to rapidly cool the rock sample, and the constant humidity machine 24 is used to maintain the humidity in the reaction cavity 211 during the experiment. The microwave excitation system 1 and the constant temperature water tank 25 can be operated alternately to achieve the purpose of microwave heating and water cooling alternately circulating.

[0024] The utility model not only combines microwave rock breaking and water cooling rock breaking organically, but also integrates functions such as cooling water recycling. The application of microwave heating and water cooling alternately circulating rock breaking technology in engineering practice and rock breaking mechanism exploration has great significance, and can lay a solid foundation for the industrial application of microwave heating and water cooling alternately circulating rock breaking.

[0025] Further, the reaction cavity 211 is communicated with a gas tank, and the gas tank contains inert gas. For example, argon, helium or carbon dioxide or other inert gases. In addition, the gas tank can be connected to the constant humidity machine 24, and the humidification pipeline of the constant humidity machine 24 can be used to input the gas in the gas tank into the reaction cavity 211, and the dehumidification pipeline of the constant humidity machine 24 can be used to exhaust the gas in the reaction cavity 211. In this way, the gas inlet and outlet on the experimental box 21 are avoided. The humidity and gas type in the reaction cavity 211 can be controlled through the constant humidity machine 24.

[0026] Further, the microwave excitation system 1 includes a microwave source bearing platform 13, a microwave power supply 11 and a waveguide;

[0027] The microwave power source 11 and the microwave head 12 are installed on the microwave source bearing platform 13, and the microwave head 12 of the microwave power source 11 is connected to the reaction cavity 211 through the waveguide.

[0028] Further, the waveguide includes a straight waveguide 16 and a bent waveguide 212, one end of the straight waveguide 16 is connected to the microwave head 12, and the other end of the straight waveguide 16 is connected to the reaction cavity 211 through the bent waveguide 212.

[0029] The microwave power source 11, the microwave head 12, the straight waveguide 16 and the bent waveguide 212 are all prior art. The water load 14 and the waveguide power meter 18 can also be arranged on the straight waveguide 16. The microwave power source 11 and the microwave head 12 are installed on the microwave source bearing platform 13, and the microwave power source 11 is connected to the microwave head 12 through a cable. The microwave power source 11 can intelligently control the microwave output power. The waveguide power meter 18 can display the actual output power and the reflected power. The water pipe is connected to the water load 14 to cool the microwave head 12. Specifically, the microwave head 12 is a 15KW microwave head, and the microwave power source 11 is a 15KW microwave power source.

[0030] Further, a condensate water collecting tank is arranged on the humidifying pipeline of the constant humidity machine 24.

[0031] Further, the condensate water collecting tank is connected to the recycled water temporary storage device.

[0032] Generally, water vapor condensation occurs at the end of the pipeline. In order to ensure that the water vapor generated during the humidification process can be recycled, a condensate water collecting tank is arranged at the end of the humidifying pipeline to receive the condensed water in the pipeline. The bottom of the tank is designed to be inclined to facilitate the flow of water to the drain at the bottom of the condensate water collecting tank. A corresponding valve is arranged on the drain. In addition, the condensate water collecting tank can guide the condensed water to the recycled water temporary storage device in the constant temperature machine through the recycling pipeline, wherein the recycling pipeline and the humidifying pipeline are arranged in parallel in the same pipeline. When the condensed water accumulates to a certain extent, the automatic drain valve in the recycled water temporary storage device opens, and the condensed water can be transported again to the humidifying system in the constant humidity machine 24 after being treated by the filtering system. The automatic drain valve is controlled by a sensor, which automatically detects the water level and drains the water.

[0033] Further, it also includes a cooling water loader 26, which is a hollow cylindrical structure, fixed on the wall surface of the reaction cavity 211, one end of the cooling water loader 26 is connected to the constant temperature water tank 25, and the other end is connected to the reaction cavity 211.

[0034] The cooling water loader 26 is made of stainless steel, which is corrosion resistant and has sufficient strength. The cooling water loader 26 has a water inlet and a water outlet at two ends to ensure the input and output of cooling water. The water inlet is located at one end of the cooling water loader 26, which is used to suck the constant temperature cooling water from the pipeline connected with the constant temperature water tank 25. The water outlet is located at the other end, which is used to deliver the cooling water into the reaction cavity 211. The water outlet is equipped with an automatically controlled flow regulating valve, which can control the water flow rate by adjusting the valve opening degree on the constant temperature water tank 25, and can be completely closed when necessary. In order to ensure the air tightness of the reaction cavity 211, reliable sealing technology such as sealing ring and sealing coating should be used at all connection parts of the cooling water loader 26. The corresponding pump body is arranged between the constant temperature water tank 25 and the cooling water loader 26, and the constant temperature water tank 25 can realize the cooling of backflow water through the fan, refrigerant circulation and the like.

[0035] Further, the infrared temperature measuring instrument 22 and the industrial camera 27 are further included; the infrared temperature measuring instrument 22 and the industrial camera 27 are installed on the reaction cavity 211. The infrared temperature measuring instrument 22 and the industrial camera 27 are both prior art, which are used to monitor the sample change in real time. In addition, the water immersion sensor 28 is further arranged at the bottom of the reaction cavity 211.

[0036] In specific implementation:

[0037] The upper computer is connected with the infrared temperature measuring instrument 22, the constant humidity machine 24, the constant temperature water tank 25, the industrial camera 27 and the water immersion sensor 28 to ensure the normal operation of the equipment; the water immersion sensor 28 is turned on, then the sample is placed on the bearing table in the reaction cavity 211, the switch door is closed to ensure that the reaction cavity 211 is airtight; dry inert gas is supplied into the reaction cavity 211 to replace the air in the reaction cavity 211 and dry the reaction cavity 211; the water load 14 and the industrial camera 27 are turned on, then the microwave power supply 11 is turned on, the microwave power is set, the constant temperature water tank 25 is turned on, the cooling water temperature is set, and the experiment is started.

[0038] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various deformations, modifications, replacements and substitutions of the technical solutions of the present application made by those skilled in the art should fall within the protection scope determined by the claims of the present application.

Claims

1. A rock fracturing experimental device with alternating cycles of microwave heating and water cooling, characterized in that, The microwave excitation system (1) and the rock breaking experiment device (2) are included. The microwave excitation system (1) is connected with the rock breaking experiment device (2). The rock breaking experiment device (2) includes an experiment box (21), a constant humidity machine (24) and a constant temperature water tank (25). The reaction cavity (211) is arranged in the experiment box (21). The reaction cavity (211) is connected with the constant humidity machine (24) and the constant temperature water tank (25). The reaction cavity (211) is used for placing a sample. The microwave excitation system (1) is used for generating microwaves and delivering the microwaves to the sample in the reaction cavity (211). The constant temperature water tank (25) is connected with the reaction cavity (211) and is used for delivering cooling water into the reaction cavity (211) after microwave irradiation.

2. The rock cracking experimental device of claim 1, wherein, The reaction cavity (211) is connected with a gas tank. The gas tank is filled with inert gas.

3. The rock cracking experimental device of claim 1, wherein, The microwave excitation system (1) includes a microwave source bearing platform (13), a microwave power supply (11) and a waveguide. The microwave power supply (11) and the microwave head (12) are installed on the microwave source bearing platform (13). The microwave head (12) of the microwave power supply (11) is connected with the reaction cavity (211) through the waveguide.

4. The rock cracking experimental device of claim 3, wherein, The waveguide includes a straight waveguide (16) and a bent waveguide (212). One end of the straight waveguide (16) is connected with the microwave head (12). The other end of the straight waveguide (16) is connected with the reaction cavity (211) through the bent waveguide (212).

5. The rock cracking experimental device of claim 1, wherein, A condensate water collecting groove is arranged on the humidifying pipeline of the constant humidity machine (24).

6. The rock cracking experimental device of claim 5, wherein, The condensate water collecting groove is connected with a recycled water temporary storage device.

7. The rock cracking experimental device of alternating cycles of microwave heating and water cooling according to claim 1, characterized in that, A cooling water loader (26) is further included. The cooling water loader (26) is a hollow cylindrical structure. The cooling water loader (26) is fixed on the wall of the reaction cavity (211). One end of the cooling water loader (26) is connected with the constant temperature water tank (25). The other end of the cooling water loader (26) is connected with the reaction cavity (211).

8. The rock cracking experimental device of alternating cycles of microwave heating and water cooling according to claim 1, characterized in that, An infrared temperature measuring instrument (22) and an industrial camera (27) are further included. The infrared temperature measuring instrument (22) and the industrial camera (27) are installed on the reaction cavity (211).

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