Negative pressure and electric detonator starting type ocean bottom seismograph release device and operation method thereof

Abstract

The invention discloses a negative pressure and electric detonator starting type ocean bottom seismograph release device and an operation method thereof, and belongs to the field of ocean bottom detection instruments. The technical problems that an existing ocean bottom seismograph releasing device is not suitable for low-salinity environments such as lakes or fresh water environments, and the recovery rate of an ocean bottom seismograph is not high due to the fact that the structure of the ocean bottom seismograph releasing device is complex are solved. The lower portion of the main cavity is fixedly connected with the lotus root sinking frame, the one-way valve for vacuumizing vertically penetrates through and is installed on the lower bottom face of the main cavity, the diaphragm type safety valve horizontally penetrates through and is installed on the left side face of the main cavity, and the position of a firing pin of the electric explosion starting device accurately corresponds to the position of a safety diaphragm of the diaphragm type safety valve in the horizontal direction. The end cover hermetically covers the upper end of the main cavity, the electric explosion starting device is started, the interior of the main cavity is balanced with external pressure after entering seawater, and the glass ball cabin of the ocean bottom seismograph is separated from the main cavity under the action of buoyancy of the glass ball cabin and ascends to the water surface. The device is simple in structure and high in reliability and is used for releasing the ocean bottom seismograph.

Description

Technical Field

[0001] The invention relates to a negative pressure and electric squib-started seafloor seismograph release device and an operation method thereof, belonging to the field of seafloor detection instruments. Background Art

[0002] The seafloor seismometer is the main device for observing micro-vibrations caused by earthquakes and other crustal tectonic events on the seafloor. It is widely used in oil and gas detection, marine scientific research, earthquake disaster prevention and mitigation, etc. The seafloor seismometer is placed on the seafloor to observe seismic signals, which has advantages in many aspects: the seafloor seismometer can simultaneously receive longitudinal and transverse wave signals from the seafloor; the seafloor environment noise is low, and high signal-to-noise ratio acquisition is easy to achieve; the seafloor seismometer can be flexibly placed to achieve data acquisition under different observation systems; the seafloor seismometer can carry out natural earthquake observations on the seafloor.

[0003] At present, the release devices of seafloor seismometers designed by various seismometer manufacturers mostly adopt the method of "electro-corrosion principle fuse". Although this method is simple and effective, its application scenarios are restricted. It can only be applied to marine environments, not to low-salinity environments such as lakes or freshwater environments; moreover, most devices using the "electro-corrosion principle fuse" method have complex structures, resulting in a low recovery rate of seafloor seismometers.

[0004] In summary, the existing seafloor seismometer release device is not suitable for low-salinity environments such as lakes or freshwater environments. The recovery rate of the seafloor seismometer is not high due to the complex structure of the seafloor seismometer release device. Summary of the invention

[0005] The present invention aims to solve the technical problems that the existing seabed seismograph release device is not suitable for low-salinity environments such as lakes or freshwater environments, and the recovery rate of the seabed seismograph is low due to the complex structure of the seabed seismograph release device, and thus provides a negative pressure and electric explosive tube-activated seabed seismograph release device.

[0006] The technical solution of the present invention is a negative pressure and electric explosion tube-started seafloor seismograph release device, the lower part of the main cavity is fixedly connected to the lotus root sinking frame, the vacuum one-way valve vertically passes through and is installed on the lower bottom surface of the main cavity, the diaphragm safety valve horizontally passes through and is installed on the left side of the main cavity, the safety diaphragm in the diaphragm safety valve is used to separate the main cavity and the seawater outside the main cavity, the electric explosion starting device horizontally passes through and is installed on the right side of the main cavity, the position of the striker of the electric explosion starting device accurately corresponds to the safety diaphragm position of the diaphragm safety valve in the horizontal direction, the striker pierces the safety diaphragm when the electric explosion starting device is started, the end cover sealing cover is closed on the upper end of the main cavity, the air inside the main cavity is extracted by the vacuum one-way valve to realize the negative pressure sealing inside the main cavity, the bottom surface of the mounting plate is fixedly connected to the end cover, the top surface of the mounting plate is fixedly connected to the glass ball cabin of the external seafloor seismograph, the power control module is fixedly connected to the right side of the electric explosion starting device, and the electric explosion starting device is started by the power control module.

[0007] As another improvement of the present invention, the electric explosion starting device includes an electric explosion tube and a firing pin, wherein the electric explosion tube is sleeved on the outside of the firing pin, and the firing pin is slidably connected to the electric explosion tube in a horizontal direction. After the electric explosion starting device is started, the firing pin slides under horizontal thrust to puncture the safety diaphragm of the diaphragm safety valve.

[0008] As another improvement of the present invention, the power control module includes a timer control board connected to the right end of the electric explosion starting device, and the timer control board is used to realize the timed starting of the electric explosion starting device.

[0009] As another improvement of the present invention, a spring is installed at the upper end of the main cavity, and the upper end of the spring abuts against the end cover, and the spring provides a continuous upward elastic force to the end cover.

[0010] As another improvement of the present invention, the diaphragm safety valve includes a valve body, a safety diaphragm and a baffle. A horizontal through hole is arranged in the valve body, the safety diaphragm is vertically sealed inside the through hole, and the baffle is arranged at the left end of the safety diaphragm for fixing the safety diaphragm.

[0011] As another improvement of the present invention, the surface of the safety diaphragm is coated with an anti-corrosion coating.

[0012] As another improvement of the present invention, the following steps are included:

[0013] Step 1: Install the vacuum check valve, diaphragm safety valve and electric explosion starting device on the main cavity, close the end cover sealing cover on the upper end of the main cavity, and use the vacuum tooling to evacuate the inside of the main cavity to negative pressure through the vacuum check valve;

[0014] Step 2: Install the bottom of the main cavity on the sinking frame, install the mounting plate on the top surface of the end cover, and install the glass cabin of the seafloor seismometer on the mounting plate;

[0015] Step 3: After the installation of the seafloor seismometer and the release device, sink them to the seafloor to work and collect data;

[0016] Step 4: Start the electric explosion starting device through the power control module, the firing pin pierces the safety diaphragm, and the seawater enters the main cavity and balances the external pressure. The buoyancy of the glass ball cabin of the seafloor seismograph separates the end cover from the main cavity, and the glass ball cabin of the seafloor seismograph rises to the water surface under the action of buoyancy.

[0017] Beneficial effects of the present invention:

[0018] 1. After the electric explosion starter of the present invention is activated, the striker pierces the safety diaphragm, and the seawater enters the main cavity to balance the pressure with the external pressure. The buoyancy of the glass ball cabin of the seafloor seismograph separates the end cover from the main cavity, and the glass ball cabin of the seafloor seismograph rises to the water surface under the buoyancy, so that the seafloor seismograph can work normally in a low-salinity environment or a freshwater environment.

[0019] 2. The negative pressure and electric squib-activated ocean bottom seismograph release device structure used in the present invention is simpler in structure than the release mechanism of the existing ocean bottom seismograph, which can ensure the high reliability of the release device and improve the recovery rate of the ocean bottom seismograph. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a negative pressure and electric squib-activated ocean bottom seismograph release device of the present invention.

[0021] Figure 2 The invention discloses a schematic assembly diagram of a negative pressure and electric squib-activated ocean bottom seismograph release device.

[0022] Figure 3 It is a structural schematic diagram of an electric explosion starting device.

[0023] Figure 4 It is a structural diagram of a diaphragm safety valve.

[0024] Figure 5 It is a schematic diagram of the structure of a one-way valve for vacuum extraction. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the examples of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be explained that the positional relationships indicated by the terms "upper", "lower", "first", "second", etc. are only based on the positional relationships of the orientations shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the referred components have specific orientations, are constructed and operated in specific orientations, and therefore cannot be understood as limitations on the present invention.

[0026] Specific implementation method 1: Combination Figures 1 to 5 The present embodiment is described. The present embodiment is a negative pressure and electric explosion tube-started seafloor seismograph release device, comprising a lotus root sinking frame 11, a main cavity 5, an end cover 3, a mounting plate 2, a vacuum one-way valve 12, a diaphragm safety valve 13, an electric explosion starting device 6 and a power control module 9. The lower part of the main cavity 5 is fixedly connected to the lotus root sinking frame 11, the vacuum one-way valve 12 vertically passes through and is installed on the lower bottom surface of the main cavity 5, the diaphragm safety valve 13 horizontally passes through and is installed on the left side surface of the main cavity 5, and the safety diaphragm 132 in the diaphragm safety valve 13 is used to separate the main cavity 5 from the seawater outside the main cavity 5. The safety diaphragm 132 of the corresponding safety pressure is selected according to the working depth of the seafloor seismograph. The electric explosion starting device 6 passes through and is installed on the right side of the main cavity 5 horizontally. The position of the striker 61 of the electric explosion starting device 6 accurately corresponds to the position of the safety diaphragm 132 of the diaphragm safety valve 13 in the horizontal direction. When the electric explosion starting device 6 is started, the striker 61 pierces the safety diaphragm 132. The end cover 3 is sealed and covered on the upper end of the main cavity 5. The upper part of the main cavity 5 is fixed by a tooling, and is installed on the vacuum one-way valve 12 with a special tooling to evacuate the main cavity 5 to a negative pressure state. After the tooling is removed, the upper part of the main cavity 5 and the vacuum one-way valve 12 are both closed under atmospheric pressure. The air inside the main cavity 5 is extracted by the vacuum one-way valve 12 to achieve negative pressure sealing inside the main cavity 5. The bottom surface of the mounting plate 2 is connected to the end cover 3 fixing bolts, and the top surface of the mounting plate 2 is connected to the glass ball cabin 1 of the external seafloor seismograph with fixing bolts. The power control module 9 is fixedly connected to the right side of the electric explosion starting device 6, and the electric explosion starting device 6 is started by the power control module 9.

[0027] After the electric explosion starter is activated, the striker pierces the safety diaphragm, and the main cavity enters the seawater to balance the external pressure. The buoyancy of the glass ball cabin of the seafloor seismograph separates the end cover from the main cavity, and the glass ball cabin of the seafloor seismograph rises to the water surface under the buoyancy. This enables the seafloor seismograph to work normally in a low-salinity environment or a freshwater environment. This cannot be achieved by the conventional release mechanism of the seafloor seismograph using the electrochemical corrosion principle.

[0028] Specific implementation method 2: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the electric explosion starting device 6 includes an electric explosion tube 62 and a striker 61. The electric explosion tube 62 is sleeved on the outside of the striker 61. The striker 61 is slidably connected to the electric explosion tube 62 in the horizontal direction. After the electric explosion starting device 6 is started, the striker 61 slides under the horizontal thrust to puncture the safety diaphragm 132 of the diaphragm safety valve 13. The method of using the striker 61 to slide under the horizontal thrust to puncture the safety diaphragm 132 has higher reliability and simple structure, and improves the recovery rate of the seafloor seismometer. Other components and connection methods are the same as those of the first embodiment.

[0029] Specific implementation method three: Combination Figures 1 to 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the power control module 9 includes a timer control board 93 connected to the right end of the electric blasting starter 6, and the timed start of the electric blasting starter 6 is realized through the timer control board 93. The function is to pre-set the timed start time of the timer control board 93 according to the seabed working time of the seabed seismometer. Other components and connection methods are the same as those of the first embodiment.

[0030] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that a spring 4 is installed at the upper end of the main cavity 5, and the upper end of the spring 4 abuts against the end cover 3, and the spring 4 provides a continuous upward elastic force to the end cover 3. The function is that after the electric explosion starter is started, the striker pierces the safety diaphragm, and the main cavity enters the seawater to balance the external pressure. The buoyancy of the glass ball cabin of the seafloor seismometer and the upward elastic force of the spring work together to accelerate the separation of the end cover and the main cavity, thereby improving the separation efficiency. The other components and connection methods are the same as those of the first embodiment.

[0031] Specific implementation method five: Combination Figure 4 This embodiment is described. The difference between this embodiment and the first embodiment is that the diaphragm safety valve 13 includes a valve body 131, a safety diaphragm 132 and a baffle 133. A horizontal through hole is provided in the valve body 131. The safety diaphragm 132 is vertically sealed and arranged inside the through hole. The baffle 133 is arranged at the left end of the safety diaphragm 132 to fix the safety diaphragm 132. Other components and connection methods are the same as those of the first embodiment.

[0032] Specific implementation method six: Combination Figure 4This embodiment is described. The difference between this embodiment and the first embodiment is that the surface of the safety diaphragm 132 is coated with an anti-corrosion coating. The safety diaphragm 132 of the corresponding safety pressure is selected according to the working depth of the seabed seismometer and needs to be treated with anti-corrosion. The other components and connection methods are the same as those of the first embodiment.

[0033] Specific implementation method seven: Combination Figures 1 to 5 This embodiment is described. This embodiment is an operation method of a negative pressure and electric squib-activated seafloor seismograph release device based on any one of the first to sixth embodiments, comprising the following steps:

[0034] Step 1: Install the vacuum check valve 12, the diaphragm safety valve 13 and the electric explosion starting device 6 on the main cavity 5, seal the end cover 3 on the upper end of the main cavity 5, and use the vacuum tool to evacuate the inside of the main cavity 5 to a negative pressure through the vacuum check valve 12;

[0035] Step 2: Install the bottom of the main cavity 5 on the lotus root sinking frame 11, install the mounting plate 2 on the top surface of the end cover 3, and install the glass cabin of the seafloor seismometer on the mounting plate 2;

[0036] Step 3: After the installation of the seafloor seismometer and the release device, sink them to the seafloor to work and collect data;

[0037] Step 4: Start the electric explosion starting device 6 through the power control module 9, the striker 61 pierces the safety membrane 132, and the seawater enters the main cavity 5 and balances the external pressure. The buoyancy of the glass ball cabin 1 of the seafloor seismograph separates the end cover 3 from the main cavity 5, and the glass ball cabin 1 of the seafloor seismograph rises to the water surface under the action of buoyancy.

[0038] After the electric explosion starting device of the present invention is activated, the firing pin pierces the safety diaphragm, and the seawater enters the main cavity to balance the pressure with the external pressure. The self-buoyancy of the glass ball cabin of the seabed seismometer separates the end cover from the main cavity, and the glass ball cabin of the seabed seismometer rises to the water surface under the action of buoyancy. The seabed seismometer can work normally in a low-salinity environment or a freshwater environment. The release mechanism of the conventional seabed seismometer using the principle of electrochemical corrosion cannot achieve this. The structure of the present invention is relatively simple, which can ensure the high reliability of the release device and improve the recovery rate of the seabed seismometer.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure and electric squib-activated seafloor seismograph release device, Features It comprises a lotus root sinking frame (11), a main cavity (5), an end cover (3), a mounting plate (2), a vacuum one-way valve (12), a diaphragm safety valve (13), an electric explosion starting device (6) and a power supply control module (9), wherein the lower part of the main cavity (5) is fixedly connected to the lotus root sinking frame (11), the vacuum one-way valve (12) vertically passes through and is installed on the lower bottom surface of the main cavity (5), the diaphragm safety valve (13) horizontally passes through and is installed on the left side surface of the main cavity (5), the safety diaphragm (132) in the diaphragm safety valve (13) is used to separate the main cavity (5) from the seawater outside the main cavity (5), the electric explosion starting device (6) horizontally passes through and is installed on the right side surface of the main cavity (5), and the electric explosion starting device ( The position of the striker (61) of the electric explosion starter (6) corresponds accurately to the position of the safety diaphragm (132) of the diaphragm safety valve (13) in the horizontal direction. When the electric explosion starter (6) is started, the striker (61) punctures the safety diaphragm (132). The end cover (3) is sealed and closed on the upper end of the main cavity (5). The air inside the main cavity is extracted by a vacuum one-way valve (12) to achieve negative pressure sealing inside the main cavity (5). The bottom surface of the mounting plate (2) is fixedly connected to the end cover (3). The top surface of the mounting plate (2) is fixedly connected to the glass ball cabin (1) of an external seafloor seismograph. The power control module (9) is fixedly connected to the right side of the electric explosion starter (6). The electric explosion starter (6) is started by the power control module (9).

2. A negative pressure and electric squib-activated seafloor seismograph release device according to claim 1, It is characterized in that The electric explosion starting device (6) comprises an electric explosion tube (62) and a striker (61). The electric explosion tube (62) is sleeved on the outside of the striker (61). The striker (61) is slidably connected to the electric explosion tube (62) in a horizontal direction. After the electric explosion starting device (6) is started, the striker (61) slides under a horizontal thrust and punctures a safety diaphragm (132) of a diaphragm safety valve (13).

3. A negative pressure and electric squib-activated seafloor seismograph release device according to claim 2, It is characterized in that The power control module (9) comprises a timer control board (93) connected to the right end of the electric explosion starting device (6), and the timer control board (93) is used to realize the timed starting of the electric explosion starting device (6).

4. A negative pressure and electric squib-activated seafloor seismograph release device according to claim 1, It is characterized in that A spring (4) is installed at the upper end of the main cavity (5), and the upper end of the spring (4) abuts against the end cover (3). The spring (4) provides a continuous upward elastic force to the end cover (3).

5. A negative pressure and electric squib-activated seafloor seismograph release device according to claim 1, It is characterized in that The diaphragm safety valve (13) comprises a valve body (131), a safety diaphragm (132) and a baffle (133). A horizontal through hole is arranged in the valve body (131), the safety diaphragm (132) is vertically sealed and arranged inside the through hole, and the baffle (133) is arranged at the left end of the safety diaphragm (132) for fixing the safety diaphragm (132).

6. A negative pressure and electric squib-activated seafloor seismograph release device according to claim 1, It is characterized in that The surface of the safety diaphragm (132) is coated with an anti-corrosion coating.

7. A method for operating a negative pressure and electric squib-activated seafloor seismograph release device based on any one of claims 1 to 6, It is characterized in that The following steps are involved: Step 1: Install the vacuum check valve (12), the diaphragm safety valve (13) and the electric explosion starting device (6) on the main cavity (5), seal the end cover (3) on the upper end of the main cavity (5), and use the vacuum tool to evacuate the inside of the main cavity (5) to a negative pressure through the vacuum check valve (12); Step 2: Install the bottom of the main cavity (5) on the lotus root sinking frame (11), install the mounting plate (2) on the top surface of the end cover (3), and install the glass cabin of the seafloor seismometer on the mounting plate (2); Step 3: After the installation of the seafloor seismometer and the release device, sink them to the seafloor to work and collect data; Step 4: The electric explosion starting device (6) is started through the power control module (9), the striker (61) punctures the safety diaphragm (132), and the seawater enters the main cavity (5) and is balanced with the external pressure. The buoyancy of the glass ball cabin (1) of the seafloor seismograph causes the end cover (3) to separate from the main cavity (5), and the glass ball cabin (1) of the seafloor seismograph rises to the water surface under the action of the buoyancy.

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