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CN-117142913-B - Gel-like energetic material continuous pushing device and related systems, devices and methods

CN117142913BCN 117142913 BCN117142913 BCN 117142913BCN-117142913-B

Abstract

The invention discloses a gel-like energetic material continuous pushing device, a system, a device and a method thereof, wherein the gel-like energetic material can be stably filled in a water gap for a long time without a shell and is communicated with positive and negative electrodes of the gap. Other components do not contain explosives in dangerous article items, the common formula is a mixture containing nitromethane, aluminum powder and metal oxide, and the friction sensitivity and the impact sensitivity are zero through initiating explosive device test, so that the safety is extremely high. The components of the formula are insoluble or extremely insoluble in water, and the water-based primer does not lose efficacy or decompose after being soaked in water for a long time, and can be detonated normally under the action of pulse current. After the gel-like energetic material is filled in the water gap, the gel-like energetic material can generate shock waves with fixed amplitude, impulse and energy under the drive of a pulse source with specific parameters, and has excellent repeatability. Compared with the water gap discharge electrode under the original parameters, the amplitude, impulse and energy of the shock wave are greatly improved, and the method has great engineering application prospect.

Inventors

  • Shi Huantong
  • HU YUJIA
  • CHENG LUN
  • LI XINGWEN
  • WU JIAN

Assignees

  • 西安交通大学

Dates

Publication Date
20260512
Application Date
20221018

Claims (8)

  1. 1. The gel-like energetic material continuous pushing device is characterized by comprising a shell, wherein the shell is of a cylinder structure formed by assembling a front shell, a middle shell and a rear shell; The front shell is internally provided with an energetic material storage bin (214), the front end of the front shell is provided with an energetic material pushing port (216) communicated with the energetic material storage bin (214), and the rear end of the front shell is provided with a switching socket, the energetic material storage bin (214) is filled with a gel energetic material (217), and the gel energetic material comprises 30-65 parts of nitromethane, 10-30 parts of metal oxide powder, 15-40 parts of aluminum powder and 1-3 parts of hydrophobic fumed silica for gelation according to parts by weight; The novel high-speed motor is characterized in that a motor (206) is arranged in the middle shell, a adapting socket is arranged at the front end, a sealing adapting socket (203) is arranged at the rear end, the adapting socket at the front end is used for being connected with the adapting socket at the rear end of the front shell, the motor (206) is arranged on a screw rod (210), a pushing piston block (213) is arranged at the front end of the screw rod (210), a sealing ring (212) is sleeved on the pushing piston block (213), a silicone oil baffle (209) and a ball screw (208) are fixedly arranged between the pushing piston block (213) and the motor (206), the ball screw (208) is positioned between the motor (206) and the silicone oil baffle (209), and silicone oil (207) is filled between the silicone oil baffle (209) and the sealing adapting socket (203) at the rear end of the middle shell; The battery (201) and the control module (202) are arranged in the rear shell, the front end of the battery is provided with the sealing adapter socket (203) and is used for being connected with the sealing adapter socket (203) at the rear end of the middle shell in a sealing mode, the rear end of the rear shell is of a closed structure, the control module (202) is arranged on the battery (201) and is connected with the control end of the motor (206), the battery (201) is connected with the power end of the motor (206), and the motor (206) drives the pushing piston block (213) to push out gel-like energetic materials (217) from the energetic material pushing opening (216) to form a conical energetic material block (218).
  2. 2. A gap discharge device characterized by comprising an integrated gap discharge pulse source (4) and a gel-like energetic material continuous pushing device (2) according to claim 1; The integrated gap discharging pulse source (4) comprises a shell with an opening at the rear end, a small capacitor (406) is arranged in the front end of the shell, a charging insulator (407) is arranged between the small capacitor (406) and a cable socket (408), the cable socket (408) is arranged on the charging insulator (407) and is used for connecting the small capacitor (406) with an external cable, a gas switch (405) is arranged at the rear end of the small capacitor (406), one end of the gas switch (405) is connected with the small capacitor (406), the other end of the gas switch is connected with a high-voltage transmission rod (404), an electrode insulator (403) is sleeved outside the high-voltage transmission rod (404), a high-voltage electrode (402) is arranged at the tail end of the high-voltage transmission rod (404), a backflow column (401) is arranged at the rear end of the shell, the backflow column (401) is in sealing connection with a front shell of the continuous pushing device (2), a detonation gap is formed between the backflow column (401), the high-voltage electrode (402) is located in the gap, an energetic material pushing port (216) of the continuous pushing device (2) is communicated with the gap, one end of the small capacitor (405), one end of the small capacitor is connected with the gap, the gas switch (405), and the continuous pushing device (217) is used for detonating the energetic material to form a conical energetic material block (218).
  3. 3. A water gap discharge experiment system, characterized by comprising a water gap discharge experiment platform (3) and the gap discharge device of claim 2; The water gap discharge experiment platform (3) comprises a water tank (310), a large capacitor (301) and an oscilloscope (311), wherein the gap discharge device is vertically arranged in the water tank (310), the front end of the gap discharge device is provided with a coaxial transmission device (306), the rear end of the coaxial transmission device (306) is connected with the front end of the gap discharge device, the front end of the coaxial transmission device is connected with one end of a coaxial cable (304), and the other end of the coaxial cable (304) is connected with the large capacitor (301) through a three-electrode switch (302); the hydraulic pressure measuring device is characterized in that a shock wave pressure probe (308) and a forming plate (309) are arranged in water in the water tank (310), the shock wave pressure probe (308) and the forming plate (309) are respectively arranged on two sides of a conical energetic material block (218) and are located on a path of shock waves (307) generated by detonation of the conical energetic material block (218), an oscilloscope (311) is respectively connected with the shock wave pressure probe (308), a voltage probe (305) and a current probe (303), the voltage probe (305) is arranged on a coaxial cable (304), and the current probe (303) is arranged on a grounding line of the coaxial cable and a three-electrode switch (302).
  4. 4. A water gap discharge test method using the test system of claim 3, comprising the steps of: Step 1, installing a gap discharging device below a coaxial transmission device (306), forming a water gap with the length of 20 mm by a high-voltage electrode (402) and an energetic material pushing port (216), and immersing the gap discharging device in water; Step 2, controlling a high-voltage power supply to charge a large capacitor (301), and stopping charging when the voltage of the large capacitor (301) reaches 10 kV and the energy storage reaches 300J; Step 3, triggering the pre-discharge of the three-electrode switch (302), and controlling the motor (206) to work after the control module (202) picks up the magnetic field signal; Step 4, pushing the gel-like energetic material (217) into the water gap to form a cone-shaped energetic material block (218); Step 5, installing a shock wave pressure probe (308) for measuring the amplitude, impulse and energy density of a shock wave (307) generated by detonation of the conical energetic material block (218) at a position distant from the conical energetic material block (218) 15 cm; step 6, controlling a high-voltage power supply to charge the large capacitor (301), and stopping charging when the voltage of the large capacitor (301) reaches 20 kV and the energy storage reaches 1200J; and 7, triggering a three-electrode switch (302) to form a discharge loop, and injecting electric energy into the conical energetic material block (218) to enable the conical energetic material block to detonate to generate shock waves (307) in water.
  5. 5. The rock breaking system is characterized by comprising a portable power supply (503) and the gap discharging device according to claim 2, wherein the gap discharging device is arranged in a plurality of holes (502) prefabricated in a target rock body (501) with a fracturing requirement, and a cable socket (408) of the gap discharging device is connected with the portable power supply (503) through a portable coaxial cable (409).
  6. 6. A method of breaking rock using the system of claim 5, comprising the steps of: Step1, firstly determining the fracturing requirements of a target rock mass (501), wherein the fracturing requirements comprise fracturing positions and crack morphologies; Step 2, arranging a plurality of holes (502) on the surface of a target rock mass (501) according to the fracturing requirement; Step 3, installing a plurality of gap discharging devices in the corresponding holes (502) respectively; Step 4, controlling a power supply to charge, and starting the gel-like energetic material continuous pushing device (2) by pre-discharging; Step 5, the gel-like energetic material continuous pushing device (2) pushes the gel-like energetic material (217) into the detonation gap to form a cone-shaped energetic material block (218); step 6, controlling a power supply to charge the capacitor; Step 7, the capacitor voltage reaches the limit tolerance voltage of the gas switch (405); step 8, the gas switch (405) breaks down to form a discharge loop, and energy is injected into the detonation gap; step 9, detonating the conical energetic material block (218) by detonating gap discharge; step 10, judging whether the target rock mass (501) achieves the fracturing effect, if not, returning to step 5, starting the continuous pushing device again by a discharge loop formed during initiation, and if so, executing step 11; And 11, installing the gap discharging device to a new working position, and repeating the steps 2-10 until all target areas reach the fracturing effect.
  7. 7. A shale oil reservoir modification system comprising a control platform (601) and the gap discharge device of claim 2, wherein the gap discharge device is arranged in a vertical well or a horizontal well, and the control platform (601) is connected with the gap discharge device through a cable to detonate a conical energetic material block (218) in a detonation gap to generate a shock wave.
  8. 8. A method of shale oil reservoir modification employing the system of claim 7, comprising the steps of: Step 1, determining the type of an operation scene, wherein the type of the operation scene comprises a vertical well and a horizontal well; step2, if the vertical well is adopted, the gap discharging device is installed at an operation position through a transmission coaxial cable (603); if the well is a horizontal well, pushing the gap discharging device to the operation position of the heating well through a continuous oil pipe (607); step 3, a control platform (601) controls a power supply to charge a capacitor through a cable, and the pre-discharge starts a gelatinous energetic material continuous pushing device (2); step4, pushing the gel-like energetic material (217) into the detonation gap by the gel-like energetic material continuous pushing device (2) to form a cone-shaped energetic material block (218); Step 5, the control platform (601) controls the power supply to charge the capacitor through the cable; step 6, the capacitor voltage reaches the limit tolerance voltage of the gas switch (405); step 7, the gas switch (405) breaks down to form a discharge loop, and energy is injected into the detonation gap; step 8, detonating the conical energetic material block (218) by detonating gap discharge; Step 9, evaluating the reservoir reconstruction effect, if not, returning to the step 4, and if so, executing the step 10; and 10, installing the gap discharging device to a new operation position, and repeating the steps 1-9 until all operation scenes are transformed.

Description

Gel-like energetic material continuous pushing device and related systems, devices and methods The application relates to a kind of gel-like energetic material, a preparation method and related systems and devices, which are filed as China application No. 202211273737.1, 10-month 18 of 2022. Technical Field The invention belongs to the field of novel explosives, and relates to a gel-like energetic material continuous pushing device and a related system, device and method thereof. Background The liquid-electricity effect refers to a complex physical process that energy is quickly converted and various extreme physical effects are associated after high voltage and large current pass through a liquid medium, and the generated liquid-electricity effect comprises mechanical effects, acoustic effects, optical effects, chemical effects and the like, so that the liquid-electricity effect has a huge application prospect in industry. In particular to a technology for generating shock waves in water based on the hydro-electric effect, which is widely applied to the scenes such as mechanical processing and forming, electric pulse cleaning, external broken stone, oil-gas blocking removal, reservoir reconstruction and the like. The water gap discharge is a common underwater shock wave generation technology based on the liquid-electricity effect, when electrodes at two ends of the gap are loaded with a strong electric field, the water medium between the electrodes is subjected to electric breakdown to form a plasma discharge channel, and energy is further injected to enable the discharge channel to expand rapidly and push external water medium to form strong shock waves to spread outwards, so that the water gap discharge device has the advantages of being controllable, safe, good in repeatability and the like. Compared with the technology for generating the shock wave in water based on the electric explosion of the metal wire, the water gap discharge does not need matched wire feeding equipment, and the water gap can automatically recover the non-breakdown state after the capacitor energy is released, so that the preparation is made for the next discharge, and the method has more advantages in the efficient repeated working scene. However, both water gap discharge and underwater wire electric explosion are limited by the low energy conversion efficiency of the pulse capacitor energy storage, and when the device volume is limited by complex and narrow working environments (underground, mine holes, tunnels and the like), shock waves with enough energy cannot be generated. Based on the background, in the research field of wire electric explosion in water, a loading configuration that a insensitive energetic material is coated outside a wire is proposed, the wire electric explosion is utilized to ignite an outer insensitive energetic material, and a wire explosion shock wave and an energetic material shock wave are coupled to promote the energy of shock wave generated by single operation. The energetic materials used often do not contain explosives in hazardous articles, and a common formulation is a mixture comprising nitromethane, aluminum powder, and metal oxides. However, this method has disadvantages of 1) requiring a bullet feeding mechanism with a complicated structure to help to complete the repeated work, which is expensive and the structure such as a rotating wheel and a bearing is liable to be broken under the action of strong shock waves, 2) requiring a liquid energetic material to be filled in a shell to form an energetic bullet, but the energetic shell in a storage bin is liable to be broken under the strong shock to affect the repeated work, and 3) having insufficient viscosity of the liquid energetic material using a thickener such as cellulose acetate, which has a sedimentation problem and cannot stand for more than 24 hours. Therefore, the development of energetic materials for water gap discharge is a key problem to be solved urgently, so that reliable generation of single strong shock waves under complex and narrow operation terrains is realized. In addition, the key problems of 1) developing an insensitive energy-containing material which has self-supporting property and is insoluble in water and can be stably kept in a water gap for a long time under the condition of no shell, 2) developing a continuous working device capable of pushing the energy-containing material to the water gap, being suitable for the existing water gap discharging device, having simple and reliable structure, stably storing the energy-containing material in a storage bin for a long time without decomposition, failure and no gap explosion, and 3) developing a matched energy-containing material preparation device, and being capable of preparing uniform, impurity-free and bubble-free energy-containing materials. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a gelatinous energetic mater