A marine seismic exploration hydrophone cable anti-interference device

Abstract

This utility model discloses an anti-interference device for hydrophone cables used in marine seismic exploration. It includes a support connected to the side of a ship's hull, and a telescopic support rod detachably connected to the support. One end of the support rod is connected to an upper support plate, the bottom end of which is connected to an elastic element. The bottom end of the elastic element is connected to a lower support plate, which has a through hole for the hydrophone cable to pass through. The support is bolted to the side of the ship's hull, and two lugs A are connected to the support. The support rod is an electric push rod, and two lugs B are connected to its tailstock. The two lugs B are connected to the two lugs A respectively via two pins. Compared with existing technologies, this utility model uses a telescopic rod to extend the hydrophone cable to the side of the ship's hull, a structure that allows the hydrophone to be kept away from the wake. The addition of an elastic element to support the cable, which has a vibration-damping and slowing effect, makes the hydrophone's trajectory in the water smoother, improving the signal-to-noise ratio of seismic data.

Description

Technical Field

[0001] This utility model relates to the field of marine seismic survey technology, and in particular to an anti-interference device for marine seismic survey hydrophone cables. Background Technology

[0002] In existing single-channel seismic exploration at sea, the installation and use of hydrophones suffer from several technical defects: 1. Inappropriate installation location: Hydrophones are typically fixed directly to the towline bollard on the ship's side and located directly below the stern. Unstable ship speeds can easily cause the hydrophone to slip, leading to measurement deviations. 2. Severe vibration interference: Since the hydrophone is directly connected to the hull, hull vibrations are transmitted to the hydrophone via cables, affecting the measurement signal-to-noise ratio. 3. Significant wake interference: The wake generated by the ship's movement directly interferes with the hydrophone's measurement data. 4. Prominent low-frequency sound source interference: Most current offshore exploration vessels are steel-hulled, and their engines generate high-energy, low-Hertz sound sources. These low-frequency signals travel long distances in water and attenuate slowly, significantly interfering with the hydrophone's acquisition of seismic signals, masking effective signals and severely impacting data acquisition quality.

[0003] Therefore, there is an urgent need for an anti-interference device for hydrophone cables used in marine seismic exploration. Utility Model Content

[0004] The purpose of this invention is to provide an anti-interference device for hydrophone cables used in marine seismic exploration. The device uses a telescopic rod to extend the hydrophone cable to the side of the hull, which allows the hydrophone to be kept away from the wake. Furthermore, an elastic element is added to support the cable. The elastic element has a vibration reduction and deceleration effect, which makes the hydrophone's trajectory in the water smoother and improves the signal-to-noise ratio of seismic data, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An anti-interference device for hydrophone cables in marine seismic exploration includes a support connected to the side of the hull, and a telescopic support rod detachably connected to the support; one end of the support rod is connected to an upper support plate, the bottom end of the upper support plate is connected to an elastic element, the bottom end of the elastic element is connected to a lower support plate, and the lower support plate is provided with a through hole for the hydrophone cable to pass through.

[0006] A further improvement of this utility model is that the support is bolted to the side of the hull, and two lugs A are connected to the support.

[0007] A further improvement of this utility model is that the support rod is an electric push rod, and two ear plates B are connected to the tailstock of the electric push rod. The two ear plates B are respectively connected to two ear plates A by two pins.

[0008] A further improvement of this utility model is that a circular sleeve is connected to one end of the upper support plate, and the circular sleeve is connected to the piston rod end of the electric push rod by an internal hexagon screw.

[0009] A further improvement of this utility model is that the elastic element is a spring, with the top end of the spring connected to the upper support plate and the bottom end of the spring connected to the lower support plate.

[0010] A further improvement of this utility model is that there are four springs, and the four springs are evenly distributed between the upper support plate and the lower support plate.

[0011] A further improvement of this utility model is that the through hole is located at the center of the lower support plate.

[0012] A further improvement of this utility model is that a pin is connected to one end of the pin shaft.

[0013] A further improvement of this utility model is that a vibration damping sleeve is connected to the inner wall of the through hole.

[0014] A further improvement of this utility model is that the vibration damping sleeve is made of silicone.

[0015] The beneficial effects of this utility model are: This utility model relates to an anti-interference device for hydrophone cables used in marine seismic exploration. It uses a telescopic rod to extend the hydrophone cable to the side of the hull, which allows the hydrophone to be kept away from the wake. Furthermore, an elastic element is added to support the cable. The elastic element has a vibration reduction and slowing effect, which makes the hydrophone's trajectory in the water smooth and improves the signal-to-noise ratio of seismic data.

[0016] This utility model relates to an anti-interference device for hydrophone cables used in marine seismic exploration. The electric push rod is connected to the support via a pin, allowing it to be easily removed when not in operation.

[0017] This utility model relates to an anti-interference device for hydrophone cables used in marine seismic exploration. The inner wall of the through hole is connected to a vibration damping sleeve to prevent the hydrophone cable from being worn and to reduce vibration. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a partial structural schematic diagram of the present invention.

[0020] Figure 3 This is a schematic diagram showing the connection between the electric push rod of this utility model and the hull.

[0021] Figure 4 This is a top view of the lower support plate of this utility model.

[0022] Figure 5This is a schematic diagram of the pin structure of this utility model.

[0023] Figure 6 The original data graph was collected using an anti-interference device for the hydrophone cable.

[0024] Figure 7 Raw data was collected by directly attaching hydrophone cables to the hull.

[0025] In the diagram: 1-hull, 2-support, 201-ear plate A, 3-electric push rod, 301-ear plate B, 4-upper support plate, 401-round sleeve, 5-lower support plate, 501-through hole, 502-vibration damping sleeve, 6-spring, 7-pin, 701-pin, 8-hydrophone, 801-main unit, 802-cable. Detailed Implementation

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1: As Figures 1-4 As shown, an anti-interference device for hydrophone cables in marine seismic exploration includes a support 2 connected to the side of the hull 1, and a telescopic support rod detachably connected to the support 2; one end of the support rod is connected to an upper support plate 4, the bottom end of the upper support plate 4 is connected to an elastic element, the bottom end of the elastic element is connected to a lower support plate 5, and the lower support plate 5 is provided with a through hole 501 for the hydrophone cable 802 to pass through.

[0028] Support 2 is bolted to the side of hull 1, and two lugs A201 are connected to support 2.

[0029] The support rod is an electric push rod 3. Two ear plates B301 are connected to the tailstock of the electric push rod 3. The two ear plates B301 are connected to the two ear plates A201 respectively through two pins 7.

[0030] One end of the upper support plate 4 is connected to a round sleeve 401, which is connected to the piston rod end of the electric push rod 3 by an internal hex screw.

[0031] The elastic element is spring 6, with the top end of spring 6 connected to the upper support plate 4 and the bottom end of spring 6 connected to the lower support plate 5.

[0032] There are four springs 6, and the four springs 6 are evenly distributed between the upper support plate 4 and the lower support plate 5.

[0033] The through hole 501 is located at the center of the lower support plate 5.

[0034] Pin 7 is connected to a safety pin 701 at one end.

[0035] Example 2: This example is a further improvement on Example 1. The main improvement is that in Example 1, the cable 802 is easily worn when passing through the through hole 501; while in this example, the above-mentioned defects can be avoided. Specifically: A vibration damping sleeve 502 is connected to the inner wall of the through hole 501. The vibration damping sleeve 502 is made of silicone. In this embodiment, the vibration damping sleeve 502 connected to the inner wall of the through hole 501 prevents the cable 802 of the hydrophone 8 from being worn, and also serves to dampen vibration.

[0036] Apart from the above, this embodiment is exactly the same as Embodiment 1, and will not be described again here.

[0037] The specific working principle of this utility model is as follows: In this utility model, the electric push rod 3 and the hydrophone 8 host 801 share the same power supply, and the electric push rod 3 is electrically connected to a switch for controlling the extension and retraction of the electric push rod 3.

[0038] During operation, one end of the cable 802 of the hydrophone 8 is connected to the main unit 801, and the other end passes through the through hole 501 and hangs down naturally into the water. The electric push rod 3 is extended by controlling the switch, so that the cable 802 is as far away from the hull 1 as possible, reducing the pulling and vibration of the cable 802 when the hull is rocking.

[0039] This utility model employs multiple methods for precise interference suppression: ① An extension of the electric push rod 3 with a wake avoidance design solves water flow interference. ② A spring 6 with a vibration damping sleeve 502 blocks the transmission of mechanical vibration.

[0040] Specifically, spring 6 and damping sleeve 502 are adapted to the vibration frequency of hull 1, avoiding resonance and significantly absorbing vibration energy transmitted through solids. Displacement deviation is completely resolved; electric push rod 3 is fixed to hull 1 via pin 7, limiting the displacement of cable 802 radially and axially, thus solving the slippage problem. It is easy to assemble and disassemble, has a stable connection, and is compatible with various types of iron exploration vessels.

[0041] Figure 6 and Figure 7 The comparison of actual data collected with and without the anti-interference device is presented. It can be clearly seen that the data collected with the anti-interference device has a more continuous phase axis, fewer messy waveforms, and a higher signal-to-noise ratio.

[0042] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An anti-interference device for hydrophone cables used in marine seismic exploration, characterized in that: Includes a support (2) connected to the side of the hull (1), and a telescopic support rod detachably connected to the support (2); one end of the support rod is connected to an upper support plate (4), the bottom end of the upper support plate (4) is connected to an elastic element, the bottom end of the elastic element is connected to a lower support plate (5), and the lower support plate (5) is provided with a through hole (501) for the hydrophone (8) cable (802) to pass through.

2. The anti-interference device for marine seismic exploration hydrophone cables as described in claim 1, characterized in that: The support (2) is bolted to the side of the hull (1), and two lugs A (201) are connected to the support (2).

3. An anti-interference device for marine seismic exploration hydrophone cables as described in claim 1 or 2, characterized in that: The support rod is an electric push rod (3). Two ear plates B (301) are connected to the tailstock of the electric push rod (3). The two ear plates B (301) are connected to the two ear plates A (201) respectively through two pins (7).

4. The anti-interference device for marine seismic exploration hydrophone cables as described in claim 3, characterized in that: One end of the upper support plate (4) is connected to a round sleeve (401), which is connected to the piston rod end of the electric push rod (3) by an internal hex screw.

5. The anti-interference device for marine seismic exploration hydrophone cables as described in claim 1, characterized in that: The elastic element is a spring (6), the top end of the spring (6) is connected to the upper support plate (4), and the bottom end of the spring (6) is connected to the lower support plate (5).

6. The anti-interference device for marine seismic exploration hydrophone cables as described in claim 5, characterized in that: There are four springs (6), and the four springs (6) are evenly distributed between the upper support plate (4) and the lower support plate (5).

7. The anti-interference device for marine seismic exploration hydrophone cables as described in claim 1, characterized in that: The through hole (501) is located at the center of the lower support plate (5).

8. The anti-interference device for marine seismic exploration hydrophone cables as described in claim 3, characterized in that: One end of the pin (7) is connected to a pin (701).

9. An anti-interference device for marine seismic exploration hydrophone cables as described in claim 1 or 7, characterized in that: The inner wall of the through hole (501) is connected to a vibration damping sleeve (502).

10. The anti-interference device for marine seismic exploration hydrophone cables as described in claim 9, characterized in that: The vibration damping sleeve (502) is made of silicone.

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