CN210427817U

CN210427817U - Geophysical prospecting continuously controllable seismic source device

Info

Publication number: CN210427817U
Application number: CN201921588005.5U
Authority: CN
Inventors: 戴学军; 张玉静; 吴娇
Original assignee: Huizhou University
Current assignee: Huizhou University
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-04-28
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a geophysical prospecting continuously controllable seismic source device, oxygen is input through a first air inlet pipe and fuel gas is input through a second air inlet pipe at intervals, the oxygen and the fuel gas are mixed according to a certain proportion in a combustion area, an electric spark plug performs timed automatic interval ignition, the fuel gas explodes at intervals in a combustion chamber, when the mixed gas is excited and exploded, high-temperature high-pressure gas is formed, the high-temperature high-pressure gas is transmitted in a shock tube body, an isolation door body is instantaneously rotated to be attached to the side wall of a rectangular cavity under the traction of a reset spring hinge to form shock waves, so that the shock tube body vibrates, when the mixed gas in the shock tube body is burnt out, the isolation door body resets under the traction of the reset spring hinge, then the next gas is waited to enter the mixed ignition shock waves, thereby forming a seismic source which stably emits shock waves, the utility model discloses a shock tube body improves the efficiency of converting sound wave energy, the seismic source excitation has sustainability, and the interval time, energy intensity and excitation frequency of the excitation can be controlled.

Description

Geophysical prospecting continuously controllable seismic source device

Technical Field

The utility model belongs to the technical field of the soap is made, concretely relates to geophysical prospecting lasts controllable seismic source device.

Background

The existing seismic sources for acoustic exploration in geological exploration can be divided into explosive sources and non-explosive sources, wherein the explosive sources such as explosives and energy-gathering bombs generate large energy, but most of the energy overflows into the air environment, the energy is not concentrated and has certain dangerousness and uncontrollable property, each filling process takes a large amount of time, and the defects of low efficiency and low resource utilization rate exist. The non-explosive seismic sources can be divided into pulse seismic sources and controllable seismic sources, common pulse seismic sources comprise electric sparks, air guns, vibration hammers and the like, the electric sparks and the vibration hammers only have one pulse each time, the frequency of the electric sparks and the vibration hammers is low, the electric sparks and the vibration hammers are friendly to the environment but the energy of the generated seismic sources is low, the air guns are only suitable for detecting with water areas and have certain limitations, but the pulse seismic sources and the explosive seismic sources do not have continuous controllability, most of the existing controllable seismic sources are electromagnetic seismic sources, the seismic source equipment has good effect as the seismic sources, but is complex and large in structure, and the maintenance and application costs are high.

Chinese utility model patent application CN104570051A discloses a high-power programme-controlled focus, this focus when using, opens the solenoid valve on gas pipeline and the oxygen pipeline through focus host computer control, fills into gas and oxygen according to certain volume ratio in the explosion section of thick bamboo of launching tube, according to the required energy control inflation time of focus, closes the solenoid valve, starts ignition afterwards, detonates the mist in the explosion section of thick bamboo, produces the focus. The seismic source directly uses the gas flow energy generated by gas combustion and explosion as the seismic source energy to excite an excitation point, the excitation intensity of the gas flow energy is weak, the gas flow energy is easy to excite, the excitation effect is not good, and multiple times of excitation may be needed. In addition, the emission energy of the seismic source is adjusted by controlling the inflation time, but the volume of the explosion cylinder is fixed, so the adjustment range is necessarily limited, and when small-energy emission is needed, in order to obtain the density of the mixed gas with small energy, the quantity of the gas to be inflated is large, so that the gas source is consumed quickly, the inflation time is long, and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a geophysical prospecting lasts controllable seismic source device to solve the problem that proposes among the above-mentioned background art.

This utility model adopts for achieving the above purpose:

a seismic source apparatus with continuously controllable geophysical prospecting, comprising:

the shock tube main body is integrally rectangular, a rectangular cavity is formed in the shock tube main body, a rectangular opening communicated with the rectangular cavity is formed in the tail end of the shock tube main body, a first through hole and a second through hole which are symmetrically arranged and perpendicular to the front end wall body are formed in the front end wall body of the shock tube main body, an excitation switch assembly is further arranged in the center between the first through hole and the second through hole in the front end wall body, a first air inlet chamber and a second air inlet chamber are respectively formed in the peripheries of the first through hole and the second through hole in the front end wall body of the shock tube main body, two symmetrical limiting piles are respectively formed in the two opposite side walls in the middle of the rectangular cavity, an isolation door body is arranged on the rear side of the two limiting piles in the middle of the rectangular cavity, one side of the isolation door body is hinged and connected with the limiting piles through a return spring hinge, and a groove is formed in the inner side of the rectangular opening in the tail end of the shock tube main body, a protection plate for sealing the rectangular opening is embedded in the embedding groove;

the first gas transmission mechanism is embedded in the first gas inlet chamber and comprises a first valve rod, a first reciprocating rod bolt, a first return spring, a first gas inlet pipe and a first gas inlet valve, wherein the first valve rod is embedded in the first through hole and can move back and forth in the first through hole, a baffle plate for sealing the first through hole is formed at the tail end of the first valve rod, the first return spring is arranged at the joint of the first valve rod and the outer end of the first through hole, the front end of the first return spring is fixedly connected with the first reciprocating rod bolt, the first reciprocating rod bolt is embedded on the first valve rod and is connected with the first valve rod into a whole, the first gas inlet pipe is fixedly connected to the middle of the front end of the first gas inlet chamber and is communicated with the first gas inlet chamber, and the outer end of the first gas inlet pipe is connected with the first gas inlet valve for controlling gas to enter;

the second air transmission mechanism is embedded in the second air inlet chamber and comprises a second air valve rod, a second reciprocating rod bolt, a second reset spring, a second air inlet pipe and a second air inlet valve, the second air valve rod is embedded in the second through hole and can move back and forth in the second through hole, a baffle plate for sealing the second through hole is formed at the tail end of the second air valve rod, the second reset spring is arranged at the joint of the second air valve rod and the outer end of the second through hole, the second reciprocating rod bolt is fixedly connected to the front end of the second reset spring, the second reciprocating rod bolt is embedded on the second air valve rod and connected with the second air valve rod into a whole, the second air inlet pipe is fixedly connected to the middle of the front end of the second air inlet chamber and communicated with the second air inlet chamber, and the outer end of the second air inlet pipe is connected with the second air inlet valve for controlling air to enter.

The excitation switch assembly is composed of an electric spark plug vertically embedded in the wall body of the shock tube main body and extending into the rectangular cavity, a high-voltage cable connected with the electric spark plug, and a high-voltage ignition switch connected with the high-voltage cable, wherein a motor part of the electric spark plug extends into the rectangular cavity.

The two sides of the isolation door body abut against the limiting piles, the top and the bottom of the isolation door body abut against the wall surface of the rectangular cavity, when the isolation door body is perpendicular to the side wall of the rectangular cavity, the isolation door body just seals the rectangular cavity, and the return spring hinge is in a loose state.

It is further described that a backfire arrester is further arranged between the first air inlet chamber and the first air inlet valve in the first air inlet pipe, and a backfire arrester is further arranged between the second air inlet chamber and the second air inlet valve on the second air inlet pipe.

It is further explained that an air inlet pipe tightening nut is further arranged at the joint of the first air inlet pipe and the first air inlet chamber and the joint of the second air inlet pipe and the second air inlet chamber.

It is further explained that the front end of the first reciprocating rod bolt extends and is embedded into the pipe orifice of the first air inlet pipe, and the rod diameter of the first reciprocating rod bolt is smaller than the pipe diameter of the first air inlet pipe.

It is further explained that the front end of the second reciprocating rod bolt extends and is embedded into the pipe orifice of the second air inlet pipe, and the rod diameter of the second reciprocating rod bolt is smaller than the pipe diameter of the second air inlet pipe.

Further, when the first return spring is in a natural return state, the baffle plate on the first valve rod is attached to the first through hole and closes the first through hole; when the second return spring is in a natural return state, the baffle plate on the second valve rod is attached to the second through hole and seals the second through hole.

Compared with the prior art, the beneficial effects of the utility model reside in that:

a combustion area and a low-pressure area are formed in a shock tube main body through an isolation door body, oxygen and fuel gas are input through a first gas inlet pipe and a second gas inlet pipe at intervals, the oxygen and the fuel gas are mixed in the combustion area according to a certain proportion, an electric spark plug is used for timed and automatic interval ignition, the explosion is generated at intervals in the combustion chamber, when the mixed gas is ignited and excited to explode, high-temperature and high-pressure gas is formed, the high-temperature and high-pressure gas is transmitted in the shock tube main body, the isolation door body is impacted by high pressure, under the traction of a return spring hinge, the isolation door body instantly rotates to be attached to the side wall of a rectangular cavity to form shock waves, so that the shock tube main body vibrates, when the mixed gas in the shock tube main body is burnt out, the isolation door body resets under the traction of the return spring hinge, then the next gas is waited to enter the mixed, compare in conventional focus device, the utility model discloses a shock tube main part improves the efficiency of conversion sound wave energy, and the focus arouses and has the sustainability, and steerable exciting interval time, energy intensity and excitation frequency.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of the front end of the shock tube main body of the present invention;

FIG. 3 is a schematic structural view of part A-A of the present invention;

FIG. 4 is a schematic structural view of part B-B of the present invention;

wherein: 1. a shock tube body; 2. a first gas delivery mechanism; 201. a first valve stem; 202. a first reciprocating rod pin; 203. a first return spring; 204. a first intake pipe; 205. a first intake valve; 3. a second gas transmission mechanism; 301. a second valve stem; 302. a second reciprocating rod pin; 303. a second return spring; 304. a second intake pipe; 305. a second intake valve; 4. a rectangular cavity; 5. a rectangular opening; 6. a first through hole; 7. a second through hole; 8. activating the switch assembly; 801. an electric spark plug; 802. a high voltage cable; 803. a high-voltage ignition switch; 9. a first intake chamber; 10. a second inlet chamber; 11. limiting piles; 12. isolating the door body; 13. a return spring hinge; 14. a fitting groove; 15. a protection plate; 16. a baffle plate; 17. a flashback arrestor; 18. the air inlet pipe is tightened with a nut; A. an explosive combustion chamber; B. a low pressure chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides the following technical solutions:

the shock tube main body 1 is integrally rectangular, a rectangular cavity 4 is arranged in the shock tube main body, a rectangular opening 5 communicated with the rectangular cavity 4 is arranged at the tail end of the shock tube main body, a first through hole 6 and a second through hole 7 which are symmetrically arranged and are perpendicular to the front end wall body are arranged on the front end wall body of the shock tube main body 1, an excitation switch assembly 8 is further arranged at the center between the first through hole 6 and the second through hole 7 on the front end wall body, a first air inlet chamber 9 and a second air inlet chamber 10 are respectively formed on the periphery of the first through hole 6 and the second through hole 7 on the front end wall surface of the shock tube main body 1, two symmetrically-arranged limiting piles 11 are respectively formed on the two opposite side walls in the middle of the rectangular cavity 4, an isolation door body 12 is arranged on the rear sides of the two limiting piles 11 in the middle of the rectangular cavity 4, the rectangular cavity 4 is isolated into two areas by the isolation door body 12, the area far away from the rectangular opening 5 is an, the area close to one side of the rectangular opening 5 is a low-pressure chamber B, one side of the isolation door body 12 is hinged to the limiting pile 11 through a return spring hinge 13, the inner tail end of the shock tube main body 1 is provided with an embedded groove 14 in the inner side of the rectangular opening 5, a protection plate 15 for sealing the rectangular opening 5 is embedded in the embedded groove 14, and the protection plate 15 is replaceable and used for preventing water body dust from entering.

The first gas transmission mechanism 2 is embedded in the first gas inlet chamber 9 and comprises a first gas valve rod 201, a first reciprocating rod bolt 202, a first reset spring 203, a first gas inlet pipe 204 and a first gas inlet valve 205, wherein the first gas valve rod 201 is embedded in the first through hole 6 and can move back and forth in the first through hole 6, a baffle 16 for sealing the first through hole 6 is formed at the tail end of the first gas valve rod, the first reset spring 203 is arranged at the joint of the first gas valve rod 201 and the outer end of the first through hole 6, the first reciprocating rod bolt 202 is fixedly connected at the front end of the first reset spring 203, the first reciprocating rod bolt 202 is embedded on the first gas valve rod 201 and is integrally connected with the first gas valve rod 201, the first gas inlet pipe 204 is fixedly connected to the middle of the front end of the first gas inlet chamber 9 and communicated with the first gas inlet chamber 9, and the outer end of the first gas inlet pipe 204 is connected with the first gas inlet valve 205 for controlling gas to enter.

The second air delivery mechanism 3 is embedded in the second air inlet chamber 10 and comprises a second valve rod 301, a second reciprocating rod bolt 302, a second return spring 303, a second air inlet pipe 304 and a second air inlet valve 305, wherein the second valve rod 301 is embedded in the second through hole 7 and can move back and forth in the second through hole 7, a baffle 16 for closing the second through hole 7 is formed at the tail end of the second valve rod 301, the second return spring 303 is arranged at the joint of the second valve rod 301 and the outer end of the second through hole 7, the second reciprocating rod bolt 302 is fixedly connected at the front end of the second return spring 303, the second reciprocating rod bolt 302 is embedded in the second valve rod 301 and is connected with the second valve rod 301 into a whole, the second air inlet pipe 304 is fixedly connected at the middle of the front end of the second air inlet chamber 10 and is communicated with the second air inlet chamber 10, and the outer end of the second air inlet pipe 304 is connected with the second air inlet valve 305 for controlling air to.

The excitation switch assembly 8 is composed of an electric spark plug 801 vertically embedded in the wall body of the shock tube main body 1 and extending into the rectangular cavity 4, a high-voltage cable 802 connected with the electric spark plug 801, and a high-voltage ignition switch 803 connected with the high-voltage cable 802, wherein the motor part of the electric spark plug 801 extends into the rectangular cavity 4.

Two sides of the isolation door body 12 abut against the limiting piles 11, the top and the bottom of the isolation door body abut against the wall surface of the rectangular cavity, when the isolation door body 12 is perpendicular to the side wall of the rectangular cavity 4, the isolation door body just seals the rectangular cavity 4, and the return spring hinge 13 is in a loose state.

A backfire arrester 17 is further arranged between the first air inlet chamber 9 and the first air inlet valve 205 in the first air inlet pipe 204, and the backfire arrester 17 is further arranged between the second air inlet chamber 10 and the second air inlet valve 305 on the second air inlet pipe 304; an air inlet pipe tightening nut 18 is further arranged at the joint of the first air inlet pipe 204 and the first air inlet chamber 9 and the joint of the second air inlet pipe 304 and the second air inlet chamber 10.

Wherein, the front end of the first reciprocating rod bolt 202 extends to be embedded into the pipe orifice of the first air inlet pipe 204 for connection, and the rod diameter of the first reciprocating rod bolt 202 is smaller than the pipe diameter of the first air inlet pipe 204; the front end of the second reciprocating rod bolt 302 extends to be embedded into a pipe orifice of the second air inlet pipe 304 to be connected, and the rod diameter of the second reciprocating rod bolt 302 is smaller than the pipe diameter of the second air inlet pipe 304; when the first return spring 203 is in a natural return state, the baffle 16 on the first valve rod 201 is attached to the first through hole 6 and closes the first through hole 6; when the second return spring 303 is in the natural return state, the baffle 16 on the second valve stem 301 is fitted to the second through hole 7 and closes the second through hole 7.

Before the application of the seismic source device with the continuously controllable geophysical prospecting, the following calculation and design are required:

a. and calculating the maximum explosion equivalent, and designing the material and the thickness of the shock tube main body 1 to avoid the shock tube main body 1 from deforming during working.

b. The gas pressure at the time of gas delivery in the first and

second intake pipes

204, 304 and the elastic force of the first and second return springs 203, 303 are set so that the first can operate.

c. A sealing rubber ring is required to be arranged between the first air inlet pipe 204 and the air inlet pipe tightening nut 18, and the inclination and luminosity of the baffle 16 at the tail ends of the first valve rod 201 and the second valve rod 301 are required to be in sealing fit with the first air inlet hole and the second air inlet hole of the explosion combustion chamber A.

d. The high-voltage cable 802 needs to have good insulation, good mechanical performance and high voltage breakdown resistance, and needs to be in good contact connection with the electric spark plug 801, and the high-voltage cable 802, the first air inlet valve 205 and the second air inlet valve 305 are connected into an external control electric box and controlled by the external control electric box.

e. The elastic force of the return spring hinge 13 is calculated, the isolation door body 12 can be reset and has certain and strong pressure, the contact position of the isolation door body 12 and the limiting pile 11 needs to be flat and smooth, and in a best embodiment, a sealing strip is arranged on the edge between the isolation door body 12 and the limiting pile 11, so that a complete independent isolation is formed.

f. The first air inlet valve 205 is connected to a high pressure oxygen cylinder and the second air inlet valve 305 is connected to a high pressure fuel cylinder.

The seismic source device with the continuously controllable geophysical prospecting is operated through the following processes:

s1, inputting oxygen from a high-pressure oxygen bottle, setting the input quantity of a first air inlet valve 205, entering a first air inlet chamber 9 through a first air inlet pipe 204 by a backfire preventer 17 under the control of the first air inlet valve 205, pushing a first reciprocating rod bolt 202 by the oxygen and conveying the oxygen to an explosive combustion chamber A of a shock tube main body 1 through a first through hole 6, simultaneously inputting fuel gas from the high-pressure fuel bottle, setting the input quantity of a second air inlet valve 305, entering a second air inlet chamber 10 through a second air inlet pipe 304 by the backfire preventer 17 under the control of the second air inlet valve 305, pushing the fuel gas to push a second reciprocating rod bolt 302 and conveying the fuel gas to the explosive combustion chamber A of the shock tube main body 1 through a second through hole 7 to be fully mixed with the oxygen to form an explosive critical gas; when the first and second intake valves 205, 305 are closed when the input amount is reached, the first valve lever 201 is automatically returned by the return/return spring action of the first return spring 203, so that the trailing end shutter 16 closes the first through hole 6, and the second valve lever 301 is automatically returned by the return/return spring action of the second return spring 303, so that the trailing end shutter 16 closes the second through hole 7.

S2, after the combustible gas and the oxygen are fully mixed in the explosion combustion chamber A, a high-voltage ignition switch 803 is pressed, high-voltage direct current is input by an external power supply, and an electric spark plug 801 is driven to generate electric sparks through a high-voltage cable 802 to ignite explosion critical gas to generate high-temperature high-pressure gas; high-temperature high-pressure gas in the explosion combustion chamber A generates strong acting force on the isolation door body 12 under the closed constraint of the shock-resistant tube main body 1 at the periphery, so that the isolation door body 12 rotates through the reset spring hinge 13, the isolation door is pushed down to be attached to the side wall, the explosion combustion chamber A is communicated with the low-pressure chamber B, and the high-temperature high-pressure gas enters the low-pressure chamber B.

And S3, allowing high-temperature and high-pressure gas to enter a low-pressure chamber B, and pushing the low-pressure gas in the low-pressure chamber B to move forwards to form a normal shock wave for a seismic source.

And S4, after the gas in the explosion combustion chamber A is burnt out, no high pressure exists in the explosion combustion chamber A, the isolation door body 12 resets under the resetting resilience of the reset spring hinge 13, and stops when the isolation door touches the limiting pile 11, so that an independent explosion combustion chamber A and a low pressure chamber B are formed.

S5, the device regularly and repeatedly carries out S1, S2, S3 and S4 in sequence, and the sound wave vibration sources sequentially reciprocate, so that a continuous sound wave vibration source is formed, the working time interval of the electric spark plug 801 each time is required to be larger than or equal to the sum of the reset time, the inflation time and the explosion combustion time of the isolation door body 12, and the reset of the isolation door body 12 and the movement integrity of high-temperature and high-pressure gas in the shock tube main body 1 are guaranteed.

In addition, the device of the utility model can also set the isolation door bodies 12 at different positions by adjusting the position of the limit pile 11, thereby forming an explosion combustion chamber A and a low-pressure chamber B which occupy different volume proportions, and further changing the shock wave frequency of a seismic source; the explosive equivalent is adjusted by adjusting the input amount of the fuel and the volume of the explosive combustion chamber A, and the acoustic energy of the seismic source is enhanced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A seismic source apparatus with continuously controllable geophysical prospecting, comprising:

2. The seismic source apparatus of claim 1, wherein: the excitation switch component is composed of an electric spark plug which is vertically embedded in the wall body of the shock tube main body and extends into the rectangular cavity, a high-voltage cable connected with the electric spark plug and a high-voltage ignition switch connected with the high-voltage cable, and the motor part of the electric spark plug extends into the rectangular cavity.

3. The seismic source apparatus of claim 1, wherein: the two sides of the isolation door body are abutted against the limiting piles, the top and the bottom of the isolation door body are abutted against the wall surface of the rectangular cavity, when the isolation door body is perpendicular to the side wall of the rectangular cavity, the isolation door body just seals the rectangular cavity, and the return spring hinge is in a loose state.

4. The seismic source apparatus of claim 1, wherein: the first air inlet pipe is internally provided with a backfire preventer between the first air inlet chamber and the first air inlet valve, and the second air inlet pipe is also provided with a backfire preventer between the second air inlet chamber and the second air inlet valve.

5. The seismic source apparatus of claim 1, wherein: and an air inlet pipe tightening nut is further arranged at the joint of the first air inlet pipe and the first air inlet chamber and the joint of the second air inlet pipe and the second air inlet chamber.

6. The seismic source apparatus of claim 1, wherein: when the first return spring is in a relaxed state, the front end of the first reciprocating rod bolt extends to be connected with a pipe orifice of the first air inlet pipe.

7. The seismic source apparatus of claim 1, wherein: when the second return spring is in a relaxed state, the front end of the second reciprocating rod bolt extends to the pipe orifice of the second air inlet pipe to be connected.

8. The seismic source apparatus of claim 1, wherein: the front end of the first reciprocating rod bolt extends to be embedded into a pipe orifice of the first air inlet pipe to be connected, and the rod diameter of the first reciprocating rod bolt is smaller than the pipe diameter of the first air inlet pipe.

9. The seismic source apparatus of claim 1, wherein: the front end of the second reciprocating rod bolt extends to be embedded into a pipe orifice of the second air inlet pipe to be connected, and the rod diameter of the second reciprocating rod bolt is smaller than the pipe diameter of the second air inlet pipe.

10. The seismic source apparatus of claim 1, wherein: when the first return spring is in a natural return state, the baffle plate on the first valve rod is attached to the first through hole and seals the first through hole; when the second return spring is in a natural return state, the baffle plate on the second valve rod is attached to the second through hole and seals the second through hole.