Shock wave propagation experimental device for simulating different initial environments

Abstract

The invention discloses a shock wave propagation experimental device for simulating different initial environments, which is characterized in that a blasting tube and a data acquisition tube are fixed, a diaphragm is fixed on a diaphragm mounting tube, the diaphragm mounting tube is inserted and fixed in the blasting tube, the diaphragm divides the blasting tube into two independent cavities, one cavity is communicated with the data acquisition tube, and the other cavity is communicated with the data acquisition tube; one cavity forms an explosion cavity, the other cavity forms an explosion cavity, a plurality of data acquisition meters are arranged on the data acquisition pipe at intervals, the vacuumizing pump is used for vacuumizing the explosion cavity, and the combustible gas bottle is used for feeding combustible gas into the vacuumized explosion cavity. Experiment variable operation is carried out to cope with different test conditions, operation is simple and safe, and the method is suitable for being operated in a laboratory. Due to the fact that the diaphragm needs to be replaced once when blasting is conducted every time, the diaphragm is independently installed on the diaphragm installation pipe, vacuumizing and inflation of combustible gas directly act on the blasting pipe, in the replacement process, only the diaphragm installation pipe needs to be disassembled, and assembling and disassembling of the structure are greatly facilitated.

Description

Technical Field

[0001] The present invention relates to an experimental device for simulating the propagation of shock waves in different initial environments. Background Art

[0002] Due to the limitations of factors such as the selection of experimental sites, poor data validity, and poor repeatability in the current research on the influence of different initial environments on the propagation law of shock waves, it is difficult to conduct large-scale experimental research. In order to deeply understand the propagation characteristics of shock waves in different initial environments, there is an urgent need to design an experimental device that can be carried out in the laboratory and can simulate the propagation of shock waves in different initial environments to explore the influence of the initial environment on the propagation law of shock waves, which is a basic research. Summary of the Invention

[0003] The present invention provides an experimental device for simulating the propagation of shock waves in different initial environments to solve the problems existing in the above-mentioned prior art.

[0004] The technical solutions adopted by the present invention are as follows: An experimental device for simulating the propagation of shock waves in different initial environments, including a blasting tube and a data acquisition tube, further including a diaphragm, a diaphragm installation tube, a data acquisition meter, a terminal, a vacuum pump, and a combustible gas cylinder. The blasting tube and the data acquisition tube are fixed. The diaphragm is fixed on the diaphragm installation tube. The diaphragm installation tube is inserted and fixed in the blasting tube, and the diaphragm divides the blasting tube into two independent cavities. One cavity is communicated with the data acquisition tube, and the other cavity forms a blasting cavity. A plurality of data acquisition meters are arranged at intervals on the data acquisition tube, and the data collected by all the data acquisition meters are transmitted to the terminal. The vacuum pump is used to evacuate the blasting cavity, and the combustible gas cylinder is used to send combustible gas into the evacuated blasting cavity.

[0005] Further, the diaphragm installation tube includes a T-shaped tube and a fixing ring. The T-shaped tube is a hollow structure with one end open and one end closed, and the closed surface is the flange surface of the T-shaped tube. The fixing ring is fixed to the end face of the open side of the T-shaped tube. The diaphragm is placed between the T-shaped tube and the fixing ring, and the diaphragm closes the open side. The T-shaped tube is inserted into the blasting tube, and the flange surface of the T-shaped tube is fixed to the outer end face of the blasting tube and seals the outer port of the blasting tube.

[0006] Further, a positioning step surface is provided on the inner cavity wall of the pipe joint. After the T-shaped tube is inserted and fixed in the blasting tube, the fixing ring abuts against the positioning step surface.

[0007] Further, a slot hole is provided on the outer wall surface of the T-shaped tube, and a pipe joint is provided on the outer wall of the blasting tube. After the diaphragm installation tube is inserted and fixed in the blasting tube, the pipe joint communicates with the slot hole.

[0008] Further, a four-way joint with four ball valves is provided on the pipe joint. The vacuum pump and the combustible gas cylinder are respectively connected to two connection ports of the four-way joint, and the remaining one interface of the four-way joint is connected to a vacuum gauge.

[0009] Further, convex ribs are provided on the outer wall of the T-shaped pipe, and limiting grooves adapted to the convex ribs are provided on the inner wall of the data acquisition pipe.

[0010] Further, an igniter is connected to the flange surface of the T-shaped pipe, and the ignition end of the igniter extends into the blasting chamber.

[0011] Further, the data acquisition pipe is of a splicable structure and is formed by fixedly connecting a plurality of flange pipes.

[0012] Further, an electric heating tape is wrapped on the outer wall surface of the data acquisition pipe; a pipe joint is provided on the data acquisition pipe for connecting a vacuum pump.

[0013] Further, the data acquisition table is a pressure gauge or a thermometer.

[0014] The present invention has the following beneficial effects: Experiments with different membrane-breaking energies can be carried out by using different combustible gases. Experiments with different concentrations can be carried out by using the same combustible gas with different concentrations. Experiments at different temperatures can be carried out by using the data acquisition pipe with the same combustible gas at different temperatures. Experimental variable operations are carried out to cope with different test situations. The operation is relatively simple and safe and is suitable for operation in the laboratory. Since the diaphragm needs to be replaced every time a blasting is carried out, in order to facilitate the replacement of the diaphragm, the diaphragm is independently installed on the diaphragm installation pipe, and the vacuum pumping and the charging of the combustible gas are directly applied to the blasting pipe. Therefore, when replacing, only the diaphragm installation pipe needs to be disassembled, and there is no need to detach the blasting pipe and the data acquisition pipe as a whole, which greatly facilitates the loading and unloading of the portable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural diagram of the present invention.

[0016] Figure 2 is an assembly drawing of the blasting pipe, the data acquisition pipe and the diaphragm installation pipe.

[0017] Figure 3 is Figure 2 explosion diagram of.

[0018] Figure 4 is a sectional view of the assembly of the diaphragm installation pipe in the blasting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] As Figures 1 to 4, an experimental device for simulating the propagation of shock waves in different initial environments according to the present invention includes a blasting tube 1, a data acquisition tube 2, a diaphragm 3, a diaphragm installation tube 4, a data acquisition meter 5, a terminal 6, a vacuum pump, and a combustible gas cylinder. One end port of the blasting tube 1 is fixed to the data acquisition tube 2. The diaphragm 3 is fixed to the diaphragm installation tube 4, and the diaphragm installation tube 4 is inserted and fixed into the blasting tube 1. The diaphragm installation tube 4 closes the other end port of the blasting tube 1. The diaphragm 3 is placed inside the blasting tube 1 and divides the inner cavity of the blasting tube 1 into two independent cavities. One cavity is communicated with the data acquisition tube 2, and the other cavity forms a blasting cavity for filling combustible gas. The vacuum pump is used to evacuate the blasting cavity, and the combustible gas cylinder is used to send combustible gas into the evacuated blasting cavity. A number of data acquisition meters 5 are spaced on the data acquisition tube 2, and the data collected by all the data acquisition meters 5 are transmitted to the terminal 6.

[0021] Since the diaphragm 3 needs to be replaced every time a blasting occurs, in order to facilitate the replacement of the diaphragm 3 conveniently, the diaphragm 3 is independently installed on the diaphragm installation tube 4, and the evacuation and the filling of combustible gas are directly applied to the blasting tube 1. Therefore, when replacing, only the diaphragm installation tube 4 needs to be disassembled, and there is no need to separate the blasting tube 1 and the data acquisition tube 2 as a whole, which greatly facilitates the loading and unloading of the structure. The structure and assembly method of the diaphragm installation tube 4 are further described below.

[0022] The diaphragm installation tube 4 includes a T-shaped tube 41 and a fixing ring 42. The T-shaped tube 41 is a hollow structure with one end open and one end closed, and the closed surface is the flange surface of the T-shaped tube. The fixing ring 42 is fixed to the open-side end face of the T-shaped tube 41. The diaphragm 3 is placed between the T-shaped tube 41 and the fixing ring 42, and the diaphragm 3 closes the open side of the T-shaped tube 41. The T-shaped tube 41 is inserted into the blasting tube 1, and the flange surface of the T-shaped tube is fixed to the outer end face of the blasting tube 1 and seals the outer port of the blasting tube 1. An igniter 6 is connected to the flange surface of the T-shaped tube 41, and the ignition end of the igniter 6 extends into the blasting cavity.

[0023] A positioning step surface is provided on the inner cavity wall of the pipe joint 11. After the T-shaped tube 41 is inserted and fixed into the blasting tube 1, the fixing ring 42 abuts against the positioning step surface. To ensure the sealing performance, sealing rings are provided between the flange surface of the T-shaped tube 41 and the outer end face of the blasting tube 1, and between the positioning step surface and the fixing ring 42.

[0024] Since combustible gas needs to be filled into the blasting cavity, a slot hole 410 is provided on the outer wall surface of the T-shaped tube 41, and a pipe joint 11 is provided on the outer wall of the blasting tube 1. After the T-shaped tube 41 is inserted and fixed into the blasting tube 1, the pipe joint 11 communicates with the slot hole 410.

[0025] When inserting and installing the T-shaped pipe 41, in order to ensure that the slot hole 410 and the pipe joint 11 are aligned at one time, the present invention is provided with a rib 411 on the outer wall of the T-shaped pipe 41, and a limiting groove 20 adapted to the rib 411 is provided on the inner wall of the data acquisition pipe 2. Through the cooperation of the rib and the groove, the rapid positioning of the T-shaped pipe 41 in the circumferential direction is realized.

[0026] To facilitate the connection of the vacuum pump and the combustible gas cylinder, a four-way pipe 12 with four ball valves is provided on the pipe joint 11. The vacuum pump and the combustible gas cylinder are respectively connected to two connection ports of the four-way pipe 12, and the remaining one interface of the four-way pipe is connected to the vacuum gauge 13.

[0027] The data acquisition pipe 2 in the present invention is a splicable structure, which is formed by fixedly connecting several sections of flange pipes. The appropriate length of the acquisition pipe 2 is selected according to the actual test requirements, and the end of the acquisition pipe 2 on the outermost side away from the blasting pipe 1 is sealed with an end cap 8.

[0028] An electric heating tape 7 is wrapped on the outer wall surface of the data acquisition pipe 2. The electric heating tape 7 is turned on to heat the data acquisition pipe 2 for numerical simulation of different temperature scenarios. A pipe joint is provided on the data acquisition pipe 2 for connecting the vacuum pump, and this place can be used for pumping air from the data acquisition pipe 2 to simulate the simulation under different air pressure scenarios.

[0029] The data acquisition table 5 in the present invention is a pressure gauge or a thermometer.

[0030] Taking the pressure gauge as an example, the use process of the invention is described.

[0031] Press Figure 1 After assembly, close the ball valve on the connection port of the four-way pipe 12 connected to the combustible gas cylinder, open the ball valve on the connection port connected to the vacuum pump, and then evacuate the blasting cavity. After the evacuation is completed, close the ball valve on the connection port connected to the vacuum pump, open the ball valve on the connection port connected to the combustible gas cylinder, and fill the blasting cavity with combustible gas. Then, remotely ignite through the igniter 6 to conduct a blasting test. The shock wave breaks through the diaphragm 3 (the diaphragm is a polyester film), and the pressure data is collected through the pressure gauge.

[0032] Experiments with different film-breaking energies can be carried out by using different combustible gases. Experiments with different concentrations can be carried out by using the same combustible gas with different concentrations. Experiments with different temperatures can be carried out by using the same combustible gas with different temperatures of the data acquisition pipe 2. Experimental variable operations are carried out to cope with different test situations. The operation is relatively simple and safe, and is suitable for operation in the laboratory.

[0033] The above is only the preferred implementation mode of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A shock wave propagation experimental device for simulating different initial environments, comprising a blasting tube (1) and a data acquisition tube (2), characterized in that: The device also comprises a diaphragm (3), a diaphragm mounting tube (4), a data collection table (5), a terminal (6), a vacuum pump and a combustible gas bottle. The bursting tube (1) and the data collection tube (2) are fixed, the diaphragm (3) is fixed on the diaphragm mounting tube (4), the diaphragm mounting tube (4) is plugged and fixed in the bursting tube (1), and the diaphragm (3) divides the bursting tube (1) into two independent cavities, one of which is connected to the data collection tube (2), and the other cavity forms a bursting cavity. A plurality of data collection tables (5) are arranged at intervals on the data collection tube (2), and the data collected by all the data collection tables (5) are transmitted to the terminal (6). The vacuum pump is used to vacuumize the bursting cavity, and the combustible gas bottle is used to feed combustible gas into the vacuumed bursting cavity.

2. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 1, characterized in that: The diaphragm mounting tube (4) comprises a T-shaped tube (41) and a fixing ring (42); the T-shaped tube (41) is a hollow structure with one end open and the other end closed, and the closed surface is the flange surface of the T-shaped tube; the fixing ring (42) is fixed to the open side end surface of the T-shaped tube (41); the diaphragm (3) is placed between the T-shaped tube (41) and the fixing ring (42), and the diaphragm (3) closes the open side; the T-shaped tube (41) is inserted into the bursting tube (1), and the flange surface of the T-shaped tube is fixed to the outer end surface of the bursting tube (1), thereby sealing the outer end surface of the bursting tube (1).

3. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 2, characterized in that: A positioning step surface is provided on the inner cavity wall of the pipe joint (11), and after the T-shaped pipe (41) is inserted and fixed in the blasting pipe (1), the fixing ring (42) abuts against the positioning step surface.

4. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 2, characterized in that: A slot hole (410) is provided on the outer wall surface of the T-shaped tube (41), and a pipe joint (11) is provided on the outer wall of the bursting tube (1). After the diaphragm mounting tube (4) is inserted and fixed in the bursting tube (1), the pipe joint (11) is connected to the slot hole (410).

5. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 4, characterized in that: The pipe joint (11) is provided with a four-way connection (12) having four ball valves; the vacuum pump and the flammable gas bottle are respectively connected to two connection ports of the four-way connection (12); and the remaining one port of the four-way connection (12) is connected to a vacuum gauge (13).

6. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 2, characterized in that: A convex rib (411) is provided on the outer wall of the T-shaped tube (41), and a limiting groove (20) matching the convex rib (411) is provided on the inner wall of the data acquisition tube (2).

7. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 2, characterized in that: An igniter (6) is connected to the flange surface of the T-shaped tube (41), and an ignition end of the igniter (6) extends into the blasting chamber.

8. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 1, characterized in that: The data acquisition tube (2) is a splicable structure formed by fixedly connecting a plurality of flange tube sections.

9. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 1, characterized in that: The outer wall surface of the data acquisition tube (2) is wrapped with an electric heating belt (7); and a pipe joint is provided on the data acquisition tube (2) for connecting to a vacuum pump.

10. The shock wave propagation experimental device for simulating different initial environments as claimed in claim 1, characterized in that: The data collection table (5) is a pressure gauge or a temperature gauge.

Images