Liquid oxygen phase change fracturing research testing device

Abstract

The embodiment of the utility model discloses a liquid oxygen phase change fracturing research testing device which can obtain pressure field and temperature field distribution of all positions in the explosion process and images of the specific explosion process, and relates to the technical field of liquid oxygen explosion. The liquid oxygen phase change fracturing research testing device comprises a containing pipe, the containing pipe comprises metal pipe sections and a transparent pipe section, the metal pipe sections are arranged at the two ends of the containing pipe, the transparent pipe section is arranged in the middle of the containing pipe, the transparent pipe section is fixedly connected with the metal pipe sections, and the first ends of the metal pipe sections at the two ends of the containing pipe are cover bodies; the second end of the metal pipe section is a closed end; a combustible; an oxygen catheter; an exhaust pipe; an ignition head; the sensor is arranged on the surface of the metal pipe section and is at least used for collecting temperature and pressure in the liquid oxygen phase change fracturing process; a data processing device is placed on a first side of the containment tube and is electrically connected to the sensor. The embodiment of the utility model is suitable for monitoring the scene of the blasting process.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid oxygen explosion, in particular to a liquid oxygen phase change cracking research and testing device. Background Art

[0002] At present, the existing liquid oxygen rock breaking technology reduces the cost of blasting projects and the pollution problems in the blasting process through various means during the blasting and fracturing process, and realizes the environmental protection, safety, economy and supervision requirements of the blasting project. However, there is still an unclear fracturing mechanism for liquid oxygen rock breaking technology. Monitoring of temperature field, pressure field and blasting process during liquid oxygen fracturing and rock breaking is of great significance for exploring the fracturing mechanism.

[0003] At present, most scholars focus on using numerical simulation methods to explore the liquid oxygen phase change fracturing process, but there is no convenient and effective liquid oxygen phase change fracturing research and testing equipment to analyze it experimentally. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a liquid oxygen phase change fracturing research and testing device, which can observe the phase change fracturing process and detect pressure and temperature, so as to obtain the pressure field and temperature field distribution at each position during the explosion process and the specific blasting process image.

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

[0006] The embodiment of the utility model provides a liquid oxygen phase change fracturing research and testing device, the liquid oxygen phase change fracturing research and testing device comprises: a containing tube, the containing tube comprises a metal tube section and a transparent tube section, the metal tube section is arranged at both ends of the containing tube, the transparent tube section is arranged at the middle position of the containing tube, the transparent tube section is fixedly connected to the metal tube section, the first ends of the metal tube sections at both ends of the containing tube are covers, and the second ends of the metal tube sections are closed ends; combustibles, the combustibles are installed inside the containing tube; an oxygen supply pipe, the oxygen supply pipe is passed through the center position of the combustibles; an exhaust pipe, the exhaust pipe is arranged on the containing tube and connects the inside and outside of the containing tube for exhaust; an ignition head, the ignition head is passed through the surface of the containing tube and connected to the combustibles through a lead; a sensor, the sensor is installed on the surface of the metal tube section, and is at least used to collect temperature and pressure during the liquid oxygen phase change fracturing process; a data processing device, the data processing device is placed on the first side of the containing tube and is electrically connected to the sensor.

[0007] Optionally, the sensor includes a pressure sensor and a temperature sensor; the pressure sensor is arranged at the upper end of the surface of the metal pipe section; the temperature sensor is arranged at the lower end of the surface of the metal pipe section.

[0008] Optionally, the pressure sensors are symmetrically arranged about the axis of the containing tube, and the number of the pressure sensors spaced apart along the length direction of the metal pipe segments on both sides of the containing tube is at least six; the temperature sensors are symmetrically arranged about the axis of the containing tube, and the number of the temperature sensors spaced apart along the length direction of the metal pipe segments is at least four.

[0009] Optionally, the transparent tube segment is made of tempered glass and is connected to the inner spaces of the metal tube segments at both ends.

[0010] Optionally, it further includes: a photographic camera, which is installed on the second side of the containing tube, and the lens of the photographic camera is arranged toward the transparent tube section.

[0011] Optionally, a fixing bracket and a base are provided at the lower end of the metal pipe section, and the fixing bracket is fixedly connected to the base.

[0012] Optionally, the lead is connected to a controller, and the placement orientation of the controller is the same as that of the ignition head.

[0013] The utility model provides a liquid oxygen phase change fracturing research and testing device. A metal pipe section and a transparent pipe section are arranged between the containing pipes. The metal pipe section is arranged at both ends of the containing pipe, and the transparent pipe section is arranged at the middle position of the containing pipe. The specific process of the phase change fracturing can be observed through the transparent pipe section. The transparent pipe section is fixedly connected to the metal pipe section. The first ends of the metal pipe sections at both ends of the containing pipe are covers, and the second ends of the metal pipe sections are closed ends. Combustibles are arranged inside the containing pipe, and an oxygen supply pipe is arranged at the center of the combustibles. An exhaust pipe is arranged on the containing pipe and communicates the inside and outside of the containing pipe for exhaust. An ignition head is arranged on the surface of the containing pipe and is connected to the combustibles through a lead wire, so as to provide sufficient conditions for the combustion of the combustibles to perform phase change fracturing. A sensor is arranged on the surface of the metal pipe section to collect temperature and pressure during the phase change of liquid oxygen. A data processing device is placed on the first side of the containing pipe and is electrically connected to the sensor, so as to analyze the data generated by the experiment, so as to obtain the pressure field and temperature field distribution of each position during the explosion process and the specific blasting process image. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of a liquid oxygen phase change fracturing research and testing device in one embodiment of the utility model. DETAILED DESCRIPTION

[0016] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0017] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The embodiment of the utility model provides a liquid oxygen phase change fracturing research and testing device, which can obtain the pressure field and temperature field distribution at each position during the explosion process and the specific blasting process image.

[0019] The present invention is further described in detail below with reference to the accompanying drawings.

[0020] See also Figure 1 The embodiment of the utility model provides a liquid oxygen phase change fracturing research and testing device, a containing tube 10, the containing tube 10 includes a metal tube section 101 and a transparent tube section 102, the metal tube section 101 is arranged at both ends of the containing tube 10, the transparent tube section 102 is arranged in the middle of the containing tube 10, the transparent tube section 102 is fixedly connected to the metal tube section 101, the first end of the metal tube section 101 at both ends of the containing tube 10 is a cover body 103, and the second end of the metal tube section 10 is a closed end 104; a combustible 11, the combustible 11 is installed inside the containing tube 10; an oxygen supply pipe 101 is provided. 2. The oxygen delivery pipe 12 is passed through the center of the combustible material 11; the exhaust pipe 13 is provided on the receiving tube 10 and communicates the inside and the outside of the receiving tube 10 for exhausting gas; the ignition head 14 is passed through the surface of the receiving tube 10 and connected to the combustible material 11 through a lead wire; the sensor 15 is installed on the surface of the metal pipe section 101 and is at least used to collect the temperature and pressure during the phase change fracturing process of liquid oxygen; the data processing device 16 is placed on the first side of the receiving tube 10 and is electrically connected to the sensor 15;

[0021] Among them, metal pipe sections 101 are provided at both ends of the containing pipe 10, and a transparent pipe section 102 is provided in the middle position of the containing pipe 10. The transparent pipe section 102 is fixedly connected to the metal pipe section 101, which is conducive to observing the situation inside the containing pipe. The first ends of the metal pipe sections 101 at both ends of the containing pipe 10 are cover bodies 103, and the second ends of the metal pipe sections 101 are closed ends 104, which ensure that the inside of the containing pipe is not affected by the external environment. The combustible material 11 is installed inside the containing pipe 10, and the oxygen supply pipe 12 is passed through the center position of the combustible material 11, which is conducive to more complete blasting during blasting. The exhaust pipe 13 is arranged at a position of 400mm on the first side of the containing pipe 10. On the one hand, the air in the containing pipe can be emptied, and on the other hand, according to the exhaust pipe The discharged material determines whether the amount of liquid oxygen filled is full. The ignition head 14 is penetrated on the surface of the containment tube 10 and is connected to the combustible material 11 through a lead. The ignition head includes a resistance wire ignition head, which is arranged at any position of the metal pipe segment and the transparent pipe segment at both ends of the containment tube as needed, so as to facilitate the operator to perform ignition operation. The sensor 15 is installed on the surface of the metal pipe segment 101, and is at least used to collect the temperature and pressure during the phase change fracturing of liquid oxygen, so as to facilitate the sensor to collect the temperature information and pressure information generated during the phase change fracturing process. The data processing equipment 16 is placed on the first side of the containment tube 10 and is electrically connected to the sensor 15. It receives the temperature information and pressure information transmitted by the sensor, and processes them to obtain the pressure field and temperature field information during the explosion process.

[0022] The utility model provides a liquid oxygen phase change fracturing research and testing device. A metal pipe section and a transparent pipe section are arranged between the containing pipes. The metal pipe section is arranged at two ends of the containing pipe, and the transparent pipe section is arranged at the middle position of the containing pipe. The specific process of the phase change fracturing can be observed through the transparent pipe section. The transparent pipe section is fixedly connected to the metal pipe section. The first ends of the metal pipe sections at the two ends of the containing pipe are covers, and the second ends of the metal pipe sections are closed ends. Combustibles are arranged inside the containing pipe, and an oxygen supply pipe is arranged at the center of the combustibles. An exhaust pipe is arranged on the containing pipe and communicates the inside and the outside of the containing pipe for exhaust. An ignition head is arranged on the surface of the containing pipe and connected with the combustibles through a lead wire to provide sufficient conditions for the combustion of the combustibles. A sensor is arranged on the surface of the metal pipe section to collect temperature and pressure in the process of liquid oxygen phase change. A data processing device is placed on the first side of the containing pipe and is electrically connected to the sensor to receive and process temperature information and pressure information transmitted by the sensor, so as to analyze the data generated by the experiment, so as to obtain the pressure field and temperature field distribution of each position in the explosion process and the specific blasting process image.

[0023] Among them, see Figure 1 A plurality of combustible materials 11 are arranged at intervals along the axial direction of the containing tube 10. The combustible materials 11 can be flammable fibrous materials, including rolled paper.

[0024] In some embodiments, the oxygen supply pipe 12 is passed through the center of the combustible material 11, one end of the oxygen supply pipe 12 is connected to the liquid oxygen storage tank, and the other end of the oxygen supply pipe 12 is provided with a valve for controlling the flow and pressure of the liquid oxygen.

[0025] One end of the exhaust pipe 13 is connected to the containing pipe 10, and the other end of the exhaust pipe 13 is located outside the containing pipe and is provided with an exhaust valve, which is used to control the exhaust of air inside the containing pipe and the discharge of gas generated by the explosion.

[0026] See also Figure 1 In some embodiments, the sensor 15 includes a pressure sensor 151 and a temperature sensor 152; the pressure sensor 151 is arranged at the upper end of the surface of the metal pipe section 101, optionally, the model of the pressure sensor is PT100, the range of the pressure sensor is 0~100MPa, and the accuracy of the pressure sensor is ±0.1%; the temperature sensor 152 is arranged at the lower end of the surface of the metal pipe section 152, optionally, the model of the temperature sensor is a K-type thermocouple, the range of the temperature sensor is -200~1200°C, and the accuracy of the temperature sensor is ±0.5°C; wherein, the sensor 15 includes a pressure sensor 151 and a temperature sensor 152, in order to prevent the influence of factors such as sunlight on the experiment, and to more accurately obtain the temperature field and pressure field at each position, the temperature sensor is more obviously affected by sunlight, the temperature sensor is arranged at the lower end of the surface of the metal pipe section, and the pressure sensor is arranged at the upper end of the surface of the metal pipe section for ease of installation.

[0027] See also Figure 1 In some embodiments, the pressure sensors 151 are symmetrically arranged about the axis of the containing tube 10, and the number of the pressure sensors 151 arranged at intervals along the length direction of the metal pipe sections 101 on both sides of the containing tube 10 is at least six; the temperature sensors 152 are symmetrically arranged about the axis of the containing tube 10, and the number of the temperature sensors 152 arranged at intervals along the length direction of the metal pipe sections 101 is at least four; wherein, at least six pressure sensors 151 are arranged, and are symmetrically arranged about the axis of the containing tube, and the specific number of arranged pressure sensors can be increased according to actual needs; three pressure sensors are installed on the upper surface of each side of the metal pipe sections 101 on both sides, and the specific positions of the three pressure sensors on each side are 100 mm away from both ends of the metal pipe section on one side and at the center of the metal pipe section on one side;

[0028] The setting method of the temperature sensor 152 is similar to that of the pressure sensor 151. There are at least four temperature sensors 152, which are symmetrically arranged about the axis of the containing tube 10. Of course, the number can be increased according to actual needs. Two temperature sensors 152 are installed on the lower surface of each side of the metal pipe section 101 on both sides. The positions of the two temperature sensors 152 installed on each side are symmetrical about the bracket, and the distance from the two ends of the single-side metal pipe section 101 is 200 mm.

[0029] See also Figure 1 In some embodiments, the material used for the transparent tube segment 102 includes tempered glass, and is connected to the internal space of the metal tube segments 101 at both ends; specifically, the compressive strength of the tempered glass is 200 MPa, and the impact energy of the tempered glass is 10J. The transparent tube segment 102 in the containing tube 10 is made of tempered glass, and is connected to the metal tube segments 101 at both ends of the containing tube 10 through flanges to form a connected space. When the ignition explosion is carried out, it can be used as a window for easy observation, so that the high frame rate mode of the camera can capture various details in the blasting process, thereby obtaining the migration law of the explosion shock wave and the explosion gas based on the image.

[0030] See also Figure 1 In some embodiments, the liquid oxygen phase change fracturing research and testing device further includes: a photographic camera 17, which is installed on the second side of the containing tube 10, and the lens of the photographic camera 17 is set toward the transparent tube segment 102; in this way, no other device is provided on the second side of the containing tube 10, and the photographic camera 17 is installed on the second side of the containing tube, and the lens of the photographic camera 17 is set toward the transparent tube segment 102, so that during the ignition and blasting process, the situation inside the transparent tube end can be clearly and completely photographed, so that the photographic camera can record the blasting process without being affected by the blocking of the field of view by other equipment.

[0031] It should be clear that the camera 17 is a high-speed camera with a frame rate of 1000fps; in order to make the images it captures clearer, during the test, the liquid oxygen phase change cracking research test device should be placed in a position with good light exposure as much as possible.

[0032] See also Figure 1 In some embodiments, a fixed bracket 18 and a base 19 are provided at the lower end of the metal pipe segment 101, and the fixed bracket 18 and the base 19 are fixedly connected; wherein, the fixed bracket 18 below the metal pipe segment 101 supports the containing tube 10, but there is no connection relationship between the fixed bracket 18 and the metal pipe segment 101, and the containing tube 10 is placed flat on the fixed bracket 18, and the axial movement of the containing tube 10 is supported by the fixed bracket 18 and the base provided at the bottom of the fixed bracket 18, thereby facilitating the movement and placement of the liquid oxygen phase change fracturing research and testing device.

[0033] In some embodiments, the fixed bracket is a triangular structure made of metal material, the height of the fixed bracket is 300 mm, the length of the bottom side of the fixed bracket is 500 mm, the vertex of the fixed bracket is in contact with the lower end of the metal pipe segment, and the base is a rectangular flat plate made of metal material, the length of the base is 800 mm, the width of the base is 600 mm, the thickness of the base is 10 mm, and the center of the base coincides with the midpoint of the bottom side of the fixed bracket.

[0034] See also Figure 1 In some embodiments, the fuse 19 is connected to the controller 20, and the placement orientation of the controller 20 is the same as that of the ignition head 14; in this way, when an ignition operation is required, it is only necessary to operate the controller 20 to ignite the fuse 19, the fuse ignites the ignition head 14, and then the combustible material 11 is ignited through another section of the fuse 19, and the controller and the ignition head are placed in the same orientation, so the burning condition of the fuse can be observed in real time.

[0035] Specifically, the model of the electric excitation controller is EDC-100, the voltage of the electric excitation controller is 12V, the current of the electric excitation controller is 10A, the ignition time of the electric excitation controller is 0.1~10s, and the ignition intensity of the electric excitation controller is 0.1~10J.

[0036] It should be clear that in order to ensure the smooth and safe operation of the test process, the liquid oxygen phase change fracturing research test device should be placed in an empty room with a small amount of dust to avoid the generation of static electricity that affects the safety of the test.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] The above content has described the embodiments of the present utility model in detail. Those skilled in the art can design and modify the device and its use within the scope of the present utility model according to the on-site construction conditions.

[0039] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0040] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A liquid oxygen phase change cracking research and testing device, characterized in that: include: A containing tube, the containing tube comprising a metal tube segment and a transparent tube segment, the metal tube segment being arranged at both ends of the containing tube, the transparent tube segment being arranged at the middle position of the containing tube, the transparent tube segment being fixedly connected to the metal tube segment, the first ends of the metal tube segments at both ends of the containing tube being covers, and the second ends of the metal tube segments being closed ends; A combustible material, wherein the combustible material is installed inside the containing tube; An oxygen supply pipe, the oxygen supply pipe is arranged through the center of the combustible material; an exhaust pipe, the exhaust pipe being arranged on the housing pipe and communicating the inside and the outside of the housing pipe for exhausting gas; An ignition head, which is arranged on the surface of the containing tube and is connected to the combustible through a lead wire; A sensor, the sensor is installed on the surface of the metal pipe section, and is used at least to collect temperature and pressure during the liquid oxygen phase change fracturing process; A data processing device is placed on the first side of the housing tube and is electrically connected to the sensor.

2. The liquid oxygen phase change fracturing research and testing device according to claim 1, characterized in that: The sensor includes a pressure sensor and a temperature sensor; The pressure sensor is arranged at the upper end of the surface of the metal pipe section; The temperature sensor is arranged at the lower end of the surface of the metal pipe section.

3. The liquid oxygen phase change fracturing research and testing device according to claim 2, characterized in that: The pressure sensors are symmetrically arranged about the axis of the containing tube, and the number of the pressure sensors arranged at intervals along the length direction of the metal tube segments on both sides of the containing tube is at least six; The temperature sensors are symmetrically arranged about the axis of the containing tube, and the number of the temperature sensors spaced apart along the length direction of the metal tube segment is at least four.

4. The liquid oxygen phase change fracturing research and testing device according to claim 1, characterized in that: The transparent pipe section is made of tempered glass and is communicated with the inner spaces of the metal pipe sections at both ends.

5. The liquid oxygen phase change fracturing research and testing device according to claim 1, characterized in that: Also includes: A photographic camera is installed on the second side of the containing tube, and a lens of the photographic camera is arranged toward the transparent tube section.

6. The liquid oxygen phase change fracturing research and testing device according to claim 1, characterized in that: A fixing bracket and a base are provided at the lower end of the metal pipe section, and the fixing bracket is fixedly connected to the base.

7. The liquid oxygen phase change fracturing research and testing device according to claim 1, characterized in that: The lead is connected to a controller, and the placement orientation of the controller is the same as that of the ignition head.

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