Negative pressure and electric squib-activated ocean bottom seismograph release device and operating method thereof

Abstract

A negative pressure and electric squib-activated ocean bottom seismograph release device and its operating method belong to the field of ocean bottom detection instruments. The present invention solves the technical problems that the existing ocean bottom seismograph release device is not suitable for low-salinity environments such as lakes or freshwater environments, and the recovery rate of the ocean bottom seismograph is not high due to the complex structure of the ocean bottom seismograph release device. The lower part of the main cavity is fixedly connected to the lotus root frame, the vacuum one-way valve passes vertically through and is installed on the lower bottom surface of the main cavity, the diaphragm safety valve passes horizontally through and is installed on the left side of the main cavity, the firing pin position of the electric squib-activated device accurately corresponds to the safety diaphragm position of the diaphragm safety valve in the horizontal direction, the end cover seal is closed on the upper end of the main cavity, the electric squib-activated device is activated, the interior of the main cavity enters seawater and is balanced with the external pressure, and the glass ball cabin of the ocean bottom seismograph is separated from the main cavity by its own buoyancy and rises to the water surface. The structure is simple and the reliability is high. The present invention is used for the release of ocean bottom seismographs.

Description

Technical Field

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

[0002] Seafloor seismometers are the primary instruments used to observe microvibrations caused by earthquakes and other tectonic events on the seafloor. They are widely used in oil and gas exploration, marine scientific research, and earthquake disaster prevention and mitigation. Seafloor seismometers are placed on the seafloor to observe seismic signals and offer several advantages: they can simultaneously receive both longitudinal and transverse waves; the seafloor environment is low in noise, making it easy to achieve high signal-to-noise ratio data acquisition; their flexible placement allows for data collection under different observation systems; and they can be used to observe natural earthquakes on the seafloor.

[0003] Currently, most seafloor seismometer release devices designed by various seismometer manufacturers utilize an electro-corrosion fuse. While this method is simple and effective, its application scenarios are limited. It can only be used in marine environments and is not suitable for low-salinity environments such as lakes or freshwater environments. Furthermore, most devices using the electro-corrosion fuse have complex structures, resulting in a low recovery rate for 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 seismometer release device is not suitable for low-salinity environments such as lakes or freshwater environments, and the recovery rate of the seabed seismometer is low due to the complex structure of the seabed seismometer release device. A negative pressure and electric squib-activated seabed seismometer release device is provided.

[0006] The technical solution of the present invention is a negative pressure and electric squib-activated seafloor seismograph release device, the lower part of the main cavity is fixedly connected to the lotus root 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 firing pin of the electric explosion starting device accurately corresponds to the safety diaphragm position of the diaphragm safety valve in the horizontal direction, when the electric explosion starting device is started, the firing pin pierces the safety diaphragm, 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. The electric explosion tube is mounted on the outside of the firing pin, and the firing pin is slidably connected to the electric explosion tube in the 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 start 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 provided in the valve body, the safety diaphragm is vertically sealed inside the through hole, and the baffle is provided 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 one-way 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 one-way 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 seafloor seismometer glass cabin on the mounting plate;

[0015] Step 3: After installing the seafloor seismometer and the release device, sink it into the seabed 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 pressure with the external pressure. The 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.

[0017] Beneficial effects of the present invention:

[0018] 1. After the electric explosive initiator is activated, the firing pin punctures the safety diaphragm. Seawater enters the main chamber, balancing the pressure with the external pressure. The buoyancy of the glass sphere of the seafloor seismometer separates the end cap from the main chamber, and the buoyancy causes the glass sphere to rise to the water surface. This allows the seafloor seismometer to operate normally in low-salinity or freshwater environments.

[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 existing ocean bottom seismographs, which can ensure the high reliability of the release device and improve the recovery rate of ocean bottom seismographs. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0022] Figure 3 It is a structural 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 structural diagram 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 are within 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 a specific orientation, are constructed and operated in a specific orientation, and therefore cannot be understood as limiting 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 blasting tube-started seafloor seismograph release device, comprising a lotus root 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 blasting starting device 6 and a power control module 9. The lower part of the main cavity 5 is fixedly connected to the lotus root 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 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 corresponds exactly 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 punctures the safety diaphragm 132. The end cover 3 is sealed on the upper end of the main cavity 5. The upper part of the main cavity 5 is fixed by tooling and 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 with fixing bolts, and the top surface of the mounting plate 2 is connected to the glass ball cabin 1 of the external sea bottom 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 explosive triggering device is activated, the firing pin punctures the safety diaphragm. Seawater enters the main chamber, balancing the pressure with the external pressure. The buoyancy of the glass sphere of the seafloor seismometer separates the end cap from the main chamber, and the sphere rises to the surface under the action of buoyancy. This enables the seafloor seismometer to operate normally in low-salinity environments or freshwater environments. This is impossible with conventional seafloor seismometer release mechanisms that rely on electrochemical corrosion.

[0028] Specific implementation method 2: Combination Figures 1 to 4 This embodiment differs from the first embodiment in that the electric blasting initiation device 6 includes a squib 62 and a striker 61. The squib 62 is mounted externally to the striker 61, and the striker 61 is horizontally slidably connected to the squib 62. After the electric blasting initiation device 6 is activated, the striker 61 slides under horizontal thrust to puncture the safety diaphragm 132 of the diaphragm safety valve 13. This method of puncturing the safety diaphragm 132 with the striker 61 under horizontal thrust offers greater reliability, a simpler structure, and improves the recovery rate of the seafloor seismometer. Other components and connection methods are the same as those in the first embodiment.

[0029] Specific implementation method three: Combination Figures 1 to 4 This embodiment differs from the first embodiment in that the power supply control module 9 includes a timer control board 93 connected to the right end of the electric blasting initiator 6. This board 93 is used to time the initiator 6. This allows the timer control board 93 to pre-set the timer start time based on the seafloor operating time of the seafloor seismometer. The remaining components and connections are the same as those in the first embodiment.

[0030] Specific implementation method four: Combination Figure 1 and Figure 2 This embodiment differs from the first embodiment in that a spring 4 is mounted on the upper end of the main chamber 5. The upper end of the spring 4 abuts against the end cap 3, providing a continuous upward force on the end cap 3. This function is to activate the electric explosive trigger, puncture the safety diaphragm, and allow seawater to enter the main chamber, balancing the pressure with the external pressure. The buoyancy of the seafloor seismometer's glass bulb and the upward force of the spring accelerate the separation of the end cap from the main chamber, improving separation efficiency. Other components and connection methods are the same as those in the first embodiment.

[0031] Specific implementation method five: Combination Figure 4 This embodiment differs from the first embodiment in 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 within the valve body 131, and the safety diaphragm 132 is vertically and sealedly disposed within the through-hole. The baffle 133 is disposed at the left end of the safety diaphragm 132 to secure 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 differs from the first embodiment in that the surface of the safety diaphragm 132 is coated with an anti-corrosion coating. The safety diaphragm 132, which has a corresponding safety pressure according to the operating depth of the seafloor seismometer, needs to be treated with an anti-corrosion coating. The remaining 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 based on any one of the first to sixth embodiments and is an operating method of a negative pressure and electric squib-activated ocean bottom seismograph release device, comprising the following steps:

[0034] Step 1: Install the vacuum one-way 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 one-way 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 seafloor seismometer glass cabin on the mounting plate 2;

[0036] Step 3: After installing the seafloor seismometer and the release device, sink it into the seabed to work and collect data;

[0037] Step 4: Start the electric explosion starting device 6 through the power control module 9, the firing pin 61 punctures the safety membrane 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 seabed seismometer separates the end cover 3 from the main cavity 5, and the glass ball cabin 1 of the seabed seismometer rises to the water surface under the action of buoyancy.

[0038] After the electric explosive initiator is activated, the firing pin punctures the safety diaphragm. Seawater enters the main chamber, balancing the pressure with the external pressure. The buoyancy of the glass sphere of the seafloor seismometer separates the end cap from the main chamber, and the buoyancy causes the glass sphere to rise to the water surface. This enables the seafloor seismometer to operate normally in low-salinity or freshwater environments. This is impossible with conventional release mechanisms of seafloor seismometers that utilize electrochemical corrosion. The present invention has a relatively simple structure, ensures high reliability of the release mechanism, and improves the recovery rate of seafloor seismometers.

[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 they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. 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 various embodiments of the present invention.

Claims

1. A negative pressure and electric squib-activated ocean bottom seismograph release device, characterized in that It comprises a lotus root sinking frame (11), a main cavity (5), an end cover (3), a mounting plate (2), a one-way valve for vacuuming (12), a diaphragm safety valve (13), an electric explosion starting device (6) and a power control module (9), wherein the lower part of the main cavity (5) is fixedly connected to the lotus root sinking frame (11), the one-way valve for vacuuming (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 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 of the main cavity (5), and the electric explosion starting device ( The position of the striker (61) of the electric explosion starter (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 starter (6) is started, the striker (61) punctures the safety diaphragm (132). The end cover (3) is sealed on the upper end of the main cavity (5). The air inside the main cavity is extracted by a vacuum check 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 the 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 ocean bottom seismograph release device according to claim 1, characterized in that: The electric explosion starting device (6) comprises an electric explosion tube (62) and a firing pin (61). The electric explosion tube (62) is sleeved on the outside of the firing pin (61). The firing pin (61) is slidably connected to the electric explosion tube (62) in a horizontal direction. After the electric explosion starting device (6) is started, the firing pin (61) slides under horizontal thrust and punctures the safety diaphragm (132) of the diaphragm safety valve (13).

3. The negative pressure and electric squib-activated ocean bottom seismograph release device according to claim 2, characterized in that: The power control module (9) includes 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. The negative pressure and electric squib-activated ocean bottom seismograph release device according to claim 1, 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. The negative pressure and electric squib-activated ocean bottom seismograph release device according to claim 1, 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 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) for fixing the safety diaphragm (132).

6. The negative pressure and electric squib-activated ocean bottom seismograph release device according to claim 1, 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 ocean bottom seismograph release device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Install the vacuum one-way 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 one-way 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 seafloor seismograph glass cabin on the mounting plate (2); Step 3: After installing the seafloor seismometer and the release device, sink it into the seabed 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 seabed seismograph causes the end cover (3) to separate from the main cavity (5), and the glass ball cabin (1) of the seabed seismograph rises to the water surface under the action of the buoyancy.

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