An ultra-high pressure container for grain confined combustion experiment

Abstract

The present invention relates to the technical field of ultra-high pressure vessels, and in particular to an ultra-high pressure vessel for a charge column constrained combustion experiment, comprising an upper flange and a lower flange, wherein the upper flange and the lower flange are connected and fixed by a plurality of flange fixing screws and flange fixing nuts arranged circumferentially, a pressure port and a pressure measuring port are arranged inside the upper flange, a one-way valve core which is clearance-matched with the pressure port is arranged below the pressure port, a one-way valve cover which is threadedly connected with the upper flange is arranged below the one-way valve core, a heat insulation board is arranged below the one-way valve cover, the heat insulation board is connected and fixed to the upper flange by heat insulation board connecting screws and heat insulation board connecting nuts, an ignition device which is fixedly connected to the lower flange by an ignition device fixing nut is arranged below the heat insulation board, an insulating gasket is arranged at the contact portion between the ignition device fixing nut and the bottom of the lower flange, an insulating sleeve and a bakelite ring are arranged between the ignition device and the inner wall of the lower flange, the lower flange is mounted on a container bracket, the lower end of the ignition device is connected to the positive electrode of the ignition wire, and the lower flange shell is connected to the negative electrode of the ignition wire. This device can be used to complete the combustion experiment of medicines in a high-pressure environment and measure the reaction characteristics of medicines.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-high pressure vessels, and in particular to an ultra-high pressure vessel for a charge restrained combustion experiment. Background Art

[0002] Ultra-high pressure vessels refer to vessels with a design pressure equal to or greater than 100 MPa, and are widely used for the storage of high-pressure gases. Conventional ultra-high pressure vessels are suitable for environments with non-direct flame heating at -40℃~400℃, and their functions mainly include the storage of high-pressure gases, external pipeline connections, and overpressure relief of the container.

[0003] At present, there are many types of downhole pipe cutting tools, which are mainly divided into chemical cutting, continuous pipe energy cutting, arc cutting and hydraulic cutting according to different cutting methods. Pyrotechnic cutting technology has become a research hotspot because of its high-efficiency cutting and non-explosive pipe products. It uses the high-temperature reactants produced by thermite to directly act on the inner wall of the pipe to achieve the purpose of cutting. The reaction effect of thermite (including the reactants, temperature, gas production pressure, etc.) will change according to its different components and reaction environments. In order to ensure the smooth combustion of the agent in the downhole working environment to cut off the pipe and determine the dosage of the agent accordingly, it is necessary to measure the reaction properties of high-energy metal agents such as thermite in special environments. Based on this, an ultra-high pressure container for the constrained combustion experiment of the charge column is designed. The designed ultra-high pressure reaction container is mainly used to simulate and measure the pressure changes caused by the reaction of thermite in the high-pressure downhole pipeline, so as to obtain the reaction time and pressure generation properties of the agent in the downhole environment. It should include functions such as ultra-high pressure gas storage, agent ignition, external pipeline inflation, pressure measurement, and overpressure relief. Summary of the invention

[0004] In order to realize the above-mentioned technical functions, the present invention proposes an ultra-high pressure container for a charge confined combustion experiment, which can effectively complete the test experiment of the combustion characteristics of the agent under high temperature and high pressure conditions.

[0005] The present invention is achieved by adopting the following technical solutions:

[0006] A super-high pressure container for a charge column constrained combustion experiment comprises an upper flange and a lower flange, wherein the upper flange and the lower flange are connected and fixed by a plurality of flange fixing screws and flange fixing nuts arranged circumferentially, a pressure port and a pressure measuring port are arranged inside the upper flange, and the characteristic is that a one-way valve core which is gap-matched with the pressure port is arranged below the pressure port, a one-way valve cover which is threadedly connected with the upper flange is arranged below the one-way valve core, a heat insulation board is arranged below the one-way valve cover, the heat insulation board is connected and fixed to the upper flange by heat insulation board connecting screws and heat insulation board connecting nuts, an ignition device is arranged below the heat insulation board, the ignition device and the lower flange are fixedly connected by the ignition device fixing nuts, an insulating gasket is arranged at the contact portion between the ignition device fixing nuts and the bottom of the lower flange, an insulating sleeve and a bakelite ring are arranged between the ignition device and the inner wall of the lower flange, the lower flange is mounted on a container bracket, the lower end of the ignition device is connected to the positive electrode of the ignition wire, and the lower flange shell is connected to the negative electrode of the ignition wire.

[0007] The ultra-high pressure container has a pressure resistance of 200 MPa. The upper flange and the lower flange are combined to form a reagent reaction cavity. The material is 42CrMo. The outer diameter of the lower flange should be greater than or equal to 1.5 times the inner diameter.

[0008] The number of the flange fixing screws and the matching flange fixing nuts is eight.

[0009] The ignition device includes an ignition positive electrode and an ignition negative electrode. The ignition positive electrode is connected to the positive electrode threaded hole on the ignition base through a thread, and the fixed connection between the bakelite board and the ignition base is completed at the same time. A negative electrode insulating lining is provided between the ignition negative electrode and the negative electrode trapezoidal hole, and the ignition negative electrode is tightened to the bakelite board through a negative electrode spring to complete the fixation.

[0010] The ignition base is provided with four holes along the circumference at 90°, which are two clamp positioning blind holes, a positive electrode threaded hole and a negative electrode trapezoidal hole. The clamp positioning blind hole is used to complete the positioning of the clamp support stud. The clamp support stud completes the axial fixation of the drug column clamp through the threaded connection with the clamp positioning threaded hole. The drug column clamp is symmetrically provided with a clamp through hole and a clamp threaded hole. The two clamps are symmetrically arranged so that the through hole of one clamp is aligned with the threaded hole of the other clamp, and two clamp set screws are successively passed through the clamp through holes and then tightened with the clamp threaded holes to complete the threaded connection, thereby clamping the drug column between the two clamps.

[0011] The beneficial effects of the present invention are:

[0012] 1. The ignition wire connects the positive and negative poles of the power supply. The current flows out from the positive pole of the current and is transmitted to the ignition base through the ignition wire. The ignition base is then connected to the negative pole of the ignition through the ignition wire wrapped around the powder column. The negative pole of the ignition contacts the lower flange of the tool to transmit the current to the tool housing. Finally, the ignition wire is connected from the tool housing to the negative pole of the power supply to form an ignition circuit.

[0013] 2. The ignition circuit adopts a series of insulation measures to avoid short circuit. The connection part between the ignition device fixing nut and the bottom of the lower flange is equipped with an insulating gasket (made of polytetrafluoroethylene) to prevent the current from directly contacting the lower flange after passing through the metal part of the ignition device and causing a short circuit; the contact part between the ignition base and the hole at the bottom of the lower flange is equipped with a positive insulating sleeve and a bakelite ring, and the contact part between the ignition base and the inner wall of the lower flange is equipped with an insulating sleeve to prevent the ignition base from directly contacting the lower flange and causing a short circuit; an insulating lining is installed between the ignition negative electrode and the negative electrode stepped hole of the ignition base to prevent the ignition negative electrode from directly contacting the ignition base and causing a short circuit; the function of the negative electrode spring is to press the bottom of the ignition negative electrode to the bottom of the lower flange, and the upper side of the negative electrode spring presses against the bakelite board as an insulating material, which can effectively prevent short circuit.

[0014] 3. The main functions of the upper flange include sealing, pressurizing and measuring the pressure of the reaction cavity. The sealing function of the upper flange is completed by compressing the sealing ring with the flange set screws arranged circumferentially with the lower flange; the pressure measuring port is connected to a pressure sensor externally to measure the pressure change in the reaction cavity and observe the pressure generated during the reaction of the drug column; the pressurization port is connected to a high-pressure gas source externally to inflate and pressurize the reaction cavity, and the high-pressure gas is injected into the upper flange through the pressurization port to push the one-way valve core against the one-way valve cover, and the gas is injected into the reaction cavity through the center hole of the one-way valve cover. After the pressurization is completed, the gas flows back from the center hole of the one-way valve cover to push the one-way valve core upward against the pressurization port to prevent gas leakage, thereby completing the one-way pressurization of the gas; the insulation board is connected to the upper flange through the insulation board connecting screws and nuts. The use of high-temperature resistant materials can prevent the high-temperature gas generated by the drug column reaction from damaging the one-way valve cover and the pressure measuring equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, wherein:

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the ignition device in the present invention;

[0018] Figure 3 It is a structural schematic diagram of the ignition base in the present invention;

[0019] Figure 4 The schematic diagram of the structure of the Chinese medicine column clamp of the present invention is

[0020] Markings in the figure:

[0021] 1. Upper flange, 2. Lower flange, 3. Pressure measuring port, 4. Flange fixing screw, 5. Flange fixing nut, 6. Container bracket, 7. Bakelite ring, 8. Pressure port, 9. Check valve core, 10. Check valve cover, 11. Insulation board connecting nut, 12. Insulation board, 13. Ignition wire, 14. Insulation board connecting screw, 15. Ignition device, 16. Insulation sleeve, 17. Positive insulation sleeve, 18. Insulation gasket, 19. Ignition device fixing screw Fixed nut, 20, powder column clamp, 21, clamp support stud, 22, clamp set screw, 23, powder column, 24, bakelite, 25, ignition base, 26, ignition negative electrode, 27, negative electrode spring, 28, negative electrode insulating lining, 29, ignition positive electrode, 20a, clamp threaded hole, 20b, clamp through hole, 20c, clamp positioning threaded hole, 25a, clamp positioning blind hole, 25b, positive electrode threaded hole, 25c, negative electrode trapezoidal hole. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0023] Embodiment 1: Figure 1As shown, the present invention includes an ultra-high pressure container for a charge column restrained combustion experiment, including an upper flange 1 and a lower flange 2, wherein the upper flange 1 and the lower flange 2 are connected and fixed by a plurality of flange fixing screws 4 and flange fixing nuts 5 arranged circumferentially, and a pressure port 8 and a pressure measuring port 3 are arranged inside the upper flange 1, characterized in that: a one-way valve core 9 which is in clearance with the pressure port is arranged below the pressure port 8, a one-way valve cover 10 which is threadedly connected to the upper flange 1 is arranged below the one-way valve core 9, and the one-way valve cover 10 A heat insulation board 12 is arranged below, and the heat insulation board 12 is connected and fixed to the upper flange 1 by heat insulation board connecting screws 14 and heat insulation board connecting nuts 11. An ignition device 15 is arranged below the heat insulation board 12, and the ignition device 15 is fixedly connected to the lower flange 2 by an ignition device fixing nut 19. An insulating gasket 18 is arranged at the contact part between the ignition device fixing nut 19 and the bottom of the lower flange 2. An insulating sleeve 16 and a bakelite ring 7 are arranged between the ignition device 15 and the inner wall of the lower flange 2. 1 is installed on the container support 6, the lower end of the ignition device is connected to the positive electrode of the ignition wire 13, and the lower flange shell is connected to the negative electrode of the ignition wire 13. The ultra-high pressure container has three functions, namely, ignition of the powder column, inflation and pressure measurement. The current is led to the ignition base 25 through the ignition wire 13 external power supply, and is transmitted to the ignition positive electrode 29 through the ignition base 25. Then, the ignition positive electrode passes through the ignition wire 13 wound on the powder column 23, and is transmitted to the lower flange 2 shell through the ignition negative electrode 26 and returns to the negative electrode of the power supply, thereby completing The charge is ignited by connecting an external high-pressure gas source to the pressurization port 8. The high-pressure gas is injected into the upper flange 1 through the pressurization port 8 to push the one-way valve core 9 against the one-way valve cover 10. The gas is injected into the reaction cavity through the center hole of the one-way valve cover 10. After the pressurization is completed, the gas flows back from the center hole of the one-way valve cover 10 to push the one-way valve core 9 upward against the pressurization port to prevent gas leakage, so that the gas is filled in one direction, thereby completing the inflation and pressurization. Secondly, a pressure sensor is connected to the pressure measuring port 3 to measure the pressure change in the reaction cavity, thereby completing the pressure measurement. The insulation board 12 is connected to the upper flange 1 through the insulation board connecting screws 14 and the insulation board connecting nuts 11. The use of high-temperature resistant materials is to prevent the high-temperature gas generated by the charge column reaction from damaging the one-way valve cover 10 and the pressure measuring equipment.

[0024] Embodiment 2: Figure 1 As shown, based on Example 1, the structure of the reaction chamber is as follows: the upper flange 1 and the lower flange 2 are combined by eight pairs of flange fixing screws 4 arranged circumferentially and their matching flange fixing nuts 5, and the reaction chamber formed has a pressure resistance of 200Mpa, wherein the outer diameter of the lower flange 2 should be greater than or equal to 1.5 times the inner diameter.

[0025] Embodiment 3: Based on the embodiment 1, the structure for igniting the charge column 23 is as follows: Figure 1 , 2As shown, the ignition device 15 includes an ignition positive electrode 29 and an ignition negative electrode 26. The ignition positive electrode 29 is connected to the positive electrode threaded hole 25b on the ignition base 25 by threading, and the fixed connection between the bakelite board 24 and the ignition base 25 is completed. A negative electrode insulating liner 28 is provided between the ignition negative electrode 26 and the negative electrode trapezoidal hole 25c, and the ignition negative electrode 26 is pressed against the bakelite board 24 by the negative electrode spring 27 to complete the fixation. Figure 2 , 3 As shown in Figure 4, the ignition base 25 is provided with four holes along the circumferential direction at 90°, which are two clamp positioning blind holes 25a, a positive electrode threaded hole 25b and a negative electrode trapezoidal hole 25c. The clamp positioning blind hole 25a is used to complete the positioning of the clamp support stud 21. The clamp support stud 21 completes the axial fixation of the drug column clamp 20 through the threaded connection with the clamp positioning threaded hole 20a. The drug column clamp 20 is provided with a clamp through hole 20b and a clamp threaded hole 20a symmetrically arranged. The two clamps are symmetrically arranged so that the clamp through hole 20b of one drug column clamp 20 is aligned with the clamp threaded hole 20a of the other drug column clamp 20, and two clamp set screws 22 are successively passed through the clamp through hole 20b and then tightened with the clamp threaded hole 20a to complete the threaded connection, thereby clamping the drug column 23 between the two drug column clamps 20.

[0026] Embodiment 4: Based on embodiment 3, the short-circuit protection structure of the ignition circuit is as follows: Figure 1 , 2 As shown in Figures 3 and 4, an insulating washer 18 (made of polytetrafluoroethylene) is installed at the connection part between the ignition device fixing nut 19 and the bottom of the lower flange 2 to prevent the current from directly contacting the lower flange 2 and causing a short circuit after passing through the metal part of the ignition device 15; the contact part between the ignition base 25 and the hole at the bottom of the lower flange 2 is equipped with a positive insulating sleeve 17 and a bakelite ring 7, and the contact part between the ignition base 25 and the inner wall of the lower flange 2 is equipped with an insulating sleeve 18 to prevent the ignition base 25 from directly contacting the lower flange 2 and causing a short circuit; a negative insulating liner 28 is installed between the negative electrode 26 and the negative electrode stepped hole 25c of the ignition base 25 to prevent the ignition negative electrode 26 from directly contacting the ignition base 25 and causing a short circuit; the function of the negative electrode spring 27 is to press the bottom of the ignition negative electrode 26 to the bottom of the lower flange 2, and the bakelite board 24 supported by the negative electrode spring 27 is an insulating material that can effectively prevent short circuits.

[0027] In summary, after reading the present invention document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the present invention without creative mental labor, which all fall within the scope of protection of the present invention.

Claims

1. An ultra-high pressure container for a charge confined combustion experiment, comprising an upper flange (1) and a lower flange (2), wherein the upper flange (1) and the lower flange (2) are connected and fixed by a plurality of flange fixing screws (4) and flange fixing nuts (5) arranged circumferentially, and a pressurizing port (8) and a pressure measuring port (3) are provided inside the upper flange (1), characterized in that: A one-way valve core (9) is provided below the pressurizing port (8) and is clearance-matched with the pressurizing port (8). A one-way valve cover (10) is provided below the one-way valve core (9) and is threadedly connected to the upper flange (1). A heat insulation board (12) is provided below the one-way valve cover (10). The heat insulation board (12) is connected and fixed to the upper flange (1) by heat insulation board connecting screws (14) and heat insulation board connecting nuts (11). An ignition device (15) is provided below the heat insulation board (12). The ignition device (15) ) is fixedly connected to the lower flange (2) by an ignition device fixing nut (19); an insulating gasket (18) is provided at the contact portion between the ignition device fixing nut (19) and the bottom of the lower flange (2); an insulating sleeve (16) and a bakelite ring (7) are provided between the ignition device (15) and the inner wall of the lower flange (2); the lower flange (2) is mounted on the container bracket (6); the lower end of the ignition device (15) is connected to the positive electrode of the ignition wire (13); and the shell of the lower flange (2) is connected to the negative electrode of the ignition wire (13).

2. The ultra-high pressure container for a grain confined combustion experiment according to claim 1 is characterized in that: The ultra-high pressure container has a pressure resistance of 200 MPa. The upper flange (1) and the lower flange (2) are combined to form a reagent reaction cavity. The material used is 42CrMo. The outer diameter of the lower flange (2) should be greater than or equal to 1.5 times the inner diameter.

3. The ultra-high pressure container for a grain confined combustion experiment according to claim 1 is characterized in that: The number of the flange fixing screws (4) and the matching flange fixing nuts (5) is eight.

4. The ultra-high pressure container for a grain confined combustion experiment according to claim 1 is characterized in that: The ignition device (15) comprises an ignition positive electrode (29) and an ignition negative electrode (26). The ignition positive electrode (29) is threadedly connected to the positive electrode threaded hole (25b) on the ignition base (25), thereby completing the fixed connection between the bakelite board (24) and the ignition base (25). A negative electrode insulating lining (28) is provided between the ignition negative electrode (26) and the negative electrode trapezoidal hole (25c), and the ignition negative electrode (26) is tightened and fixed to the bakelite board (24) by a negative electrode spring (27).

5. The ultra-high pressure container for a grain confined combustion experiment according to claim 4 is characterized in that: The ignition base (25) is provided with four holes along a circumferential angle of 90°, which are two clamp positioning blind holes (25a), a positive electrode threaded hole (25b) and a negative electrode trapezoidal hole (25c), wherein the clamp positioning blind hole (25a) is used to complete the positioning of the clamp support stud (21); the clamp support stud (21) completes the axial fixation of the drug column clamp (20) through a threaded connection with the clamp positioning threaded hole (20a); the drug column clamp (20) is provided with a clamp through hole (20b) and a clamp threaded hole (20a) symmetrically arranged, and the clamp through hole (20b) of one clamp is aligned with the clamp threaded hole (20a) of the other clamp by arranging the two clamps symmetrically, and two clamp set screws (22) are passed through the clamp through hole (20b) and then tightened with the clamp threaded hole (20a) to complete the threaded connection, thereby clamping the drug column (23) between the two clamps.

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