Ultralow-frequency controllable seismic source

Abstract

The invention relates to the technical field of exploration, and provides an ultralow-frequency vibroseis comprising a vehicle body; the multiple guide columns are arranged at intervals and slidably arranged in the middle of the vehicle body. The grounding flat plate is arranged at the bottom of the guide column; the lifting actuator is arranged on the vehicle body and provided with a piston rod, the piston rod is hinged to the ground contact flat plate, the lifting actuator is used for driving the ground contact flat plate to move downwards to make contact with the ground and is further used for lifting the vehicle body away from the ground, and after the vehicle body leaves the ground, the vehicle body serves as an inertia mass block of the lifting actuator. According to the technical scheme, the problems that if a controllable seismic source in the prior art wants to reach a lower low-frequency signal, the quality and the size of the whole machine are increased, and the specifications of related parts are increased, so that design and production are difficult to increase are solved.

Description

Technical Field

[0001] The present invention relates to the field of exploration technology, and in particular to an ultra-low frequency controllable seismic source. Background Art

[0002] In the process of conducting seismic exploration in the field to find resources such as oil and gas, the construction method has gradually changed from explosive sources to controllable sources for safety and environmental protection. Controllable sources are a kind of mechanical sources. Traditional controllable sources rely on vibrators installed on special vehicles to continuously impact the ground to generate seismic waves. Since low-frequency controllable signals below 3Hz have significant effects in direct hydrocarbon (oil and gas) indication (DHI) or low-frequency accompanying image research, both domestic and foreign countries are studying how to achieve 3Hz or even lower seismic signal excitation. At present, in the design of controllable sources, the lowest low-frequency controllable signal can reach 1.5Hz. If you want to achieve a lower low-frequency signal, you need to increase the weight of the inertial mass block or the stroke of the mass block in the design of the vibrator, which will lead to an increase in the mass and size of the whole machine, as well as an increase in the specifications of related parts, thereby increasing the difficulty of design and production.

[0003] Therefore, an ultra-low frequency controllable seismic source which uses the body mass as inertial mass is proposed to solve the above problems. Summary of the invention

[0004] The present invention proposes an ultra-low frequency controllable seismic source, which solves the problem that if the controllable seismic source in the related art wants to achieve a lower low-frequency signal, it will lead to an increase in the weight and size of the whole machine, as well as an increase in the specifications of related parts, thereby increasing the difficulty of design and production.

[0005] The technical solution of the present invention is as follows: An ultra-low frequency controllable vibrator, comprising: Vehicle body; A plurality of guide pillars, each of which is arranged at intervals and slidably disposed in the middle of the vehicle body; A ground contact plate, arranged at the bottom of the guide column; A lifting actuator is arranged on the vehicle body, and the lifting actuator has a piston rod, and the piston rod is hinged on the ground contact plate. The lifting actuator is used to drive the ground contact plate to move downward to contact the ground, and the lifting actuator is also used to lift the vehicle body off the ground. After the vehicle body leaves the ground, the vehicle body serves as an inertial mass block of the lifting actuator.

[0006] Preferably, it also includes: There are a plurality of guide column sleeves, wherein the plurality of guide column sleeves are symmetrically arranged at the corners of the middle part of the vehicle body, and each guide column is slidably arranged in one of the guide column sleeves; An upper frame is arranged on the top of the plurality of guide pillars, and the upper frame is used to fix the top of the plurality of guide pillars.

[0007] Preferably, the vehicle body comprises: Frame; There are a plurality of wheels, each of which is rotatably disposed on the frame, and after the lifting actuator lifts the frame, the wheels leave the ground to a preset height; A power assembly mechanism is arranged on the vehicle frame; An oil tank is arranged in the middle of the vehicle body and between a plurality of the guide pillars; A hydraulic radiator is arranged in the middle of the vehicle body and is located on one side of the oil tank. The hydraulic radiator is used to cool the hydraulic system.

[0008] Preferably, the oil tank comprises a fuel tank and a hydraulic oil tank, the hydraulic oil tank is communicated with the lifting actuator, and the hydraulic oil tank is used to provide hydraulic oil to the lifting actuator.

[0009] The working principle and beneficial effects of the present invention are: The present invention eliminates the traditional separate vibrator and adopts the body of the controllable vibrator as the inertial mass block, which is basically not restricted by the external dimensions and the weight can be made very large as needed. Compared with the traditional controllable vibrator, under the premise of the same vibration output, the vibration stroke is smaller, and the specifications of related control systems and parts can be smaller, thereby reducing the difficulty of design and production. In particular, the excitation energy, phase, amplitude, and impact force are all controllable, which has more advantages in ultra-low frequency applications less than 1.0 Hz. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0011] Figure 1 It is a front view of the vehicle body of the present invention; Figure 2 It is a rear view of the vehicle body of the present invention; Figure 3 It is a schematic diagram of the structure after the vehicle body of the present invention is raised.

[0012] In the figure: 1, vehicle body; 101, vehicle frame; 102, guide column sleeve; 103, wheel; 2, bridge frame; 3, transmission; 4, cab; 5, power assembly mechanism; 61, oil tank; 6, fuel tank; 7, hydraulic oil tank; 8, hydraulic radiator; 9, touch plate; 10, lifting actuator; 11, guide column; 12, upper frame. DETAILED DESCRIPTION In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0013] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0014] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0016] Reference Figure 1~Figure 3 , which is an embodiment of the present invention, proposes an ultra-low frequency controllable seismic source, including: a vehicle body 1; a plurality of guide pillars 11, which are arranged at intervals and slidably set in the middle of the vehicle body 1; a ground contact plate 9, which is set at the bottom of the guide pillars 11; a lifting actuator 10, which is set on the vehicle body 1, and the lifting actuator 10 has a piston rod, which is hinged on the ground contact plate 9. The lifting actuator 10 is used to drive the ground contact plate 9 to move downward to contact the ground, and the lifting actuator 10 is also used to lift the vehicle body 1 off the ground. After the vehicle body 1 leaves the ground, the vehicle body 1 serves as an inertial mass block of the lifting actuator 10.

[0017] In the above scheme, first, the controllable seismic source moves to the working point and then stops the vehicle. The lifting actuator 10 starts to work, and its piston rod extends to push the ground contact plate 9 downward. Since the ground contact plate 9 is connected to the vehicle body 1 through the guide column 11, the ground contact plate 9 is steadily lowered under the guidance of the guide column 11 until it contacts and couples with the ground. Then, the piston rod of the lifting actuator 10 continues to extend. At this time, the ground contact plate 9 remains stationary due to contact with the ground, and the lifting actuator 10 applies an upward force to the vehicle body 1, lifting the vehicle body 1 so that the wheel 103 leaves the ground and reaches a preset height. At this time, the vehicle body 1 as a whole serves as an inertial mass block of the lifting actuator 10. Then, by controlling the relevant control system of the lifting actuator 10, the vehicle body 1 is controlled to reciprocate up and down according to the preset ultra-low frequency control. In this process, since the ground contact plate 9 is coupled with the ground, the movement of the vehicle body 1 is transmitted to the ground contact plate 9 through the lifting actuator 10, and the ground contact plate 9 generates a reaction force on the ground, thereby generating seismic waves. After the work is completed, the control mode of the lifting actuator 10 is changed, and the piston rod is retracted. The vehicle body 1 begins to descend under the action of gravity, and the wheels 103 are pressed against the ground again. The piston rod of the lifting actuator 10 continues to retract, driving the contact plate 9 connecting the guide column 11 to move upward, so that the contact plate 9 is separated from the ground and lifted, until the contact plate 9 is lifted to a preset height, at which time the controllable vibrator can move away from the working point.

[0018] The vehicle body 1 is used as the inertial mass block, and the traditional separate vibrator is eliminated, which is basically not restricted by the external dimensions. Compared with the traditional controllable vibrator, the vibration stroke is smaller under the premise of the same vibration output. For example, in some narrow places or areas with requirements on equipment size, this design is more advantageous. The specifications of related control systems and components can be smaller, reducing the difficulties in design and production. Because there is no need to increase the design scale of the traditional vibrator in order to increase the inertial mass, the cost and production difficulty are reduced. It can better realize the excitation of ultra-low frequency signals, which is of great significance for direct hydrocarbon (oil and gas) indication (DHI) or low-frequency accompanying image research, and helps to improve the accuracy and efficiency of seismic exploration.

[0019] Furthermore, it also includes: a plurality of guide column sleeves 102, wherein the plurality of guide column sleeves 102 are symmetrically arranged at the corners of the middle part of the vehicle body 1, and each guide column 11 is slidably arranged in a guide column sleeve 102; an upper frame 12, which is arranged on the top of the plurality of guide columns 11, and the upper frame 12 is used to fix the tops of the plurality of guide columns 11.

[0020] In the above scheme, the guide post sleeve 102 is symmetrically arranged at the corners of the middle part of the vehicle body 1, providing stable sliding support for the guide post 11. When the lifting actuator 10 works to move the contact plate 9 and the vehicle body 1, the guide post 11 slides up and down in the guide post sleeve 102, ensuring the smoothness of the movement. The upper frame 12 is fixed to the top of the guide post 11, further enhancing the stability of the guide post 11, preventing the guide post 11 from deflecting or shaking during the force process, thereby ensuring that the entire device can accurately operate according to the preset movement mode during the working process, and effectively transmit the up and down reciprocating motion of the vehicle body 1 to the contact plate 9 to generate stable seismic waves.

[0021] The arrangement of the guide post sleeve 102 and the upper frame 12 enhances the stability of the guide post 11, making the connection between the ground contact plate 9 and the vehicle body 1 more stable and reliable. In the ultra-low frequency vibration process, the integrity of the device and the accuracy of movement can be better maintained, the energy loss and vibration deviation caused by structural instability can be reduced, and the quality and controllability of seismic wave generation can be improved. It helps to extend the service life of the device, reduce the number of failures and repairs caused by component shaking, wear and tear, etc., reduce the maintenance cost of the equipment, and improve the reliability and efficiency of field operations.

[0022] Furthermore, the vehicle body 1 includes: a frame 101; a plurality of wheels 103, each of which is rotatably arranged on the frame 101, and after the lifting actuator 10 lifts the frame 101, the wheels 103 leave the ground to a preset height; a power assembly mechanism 5, which is arranged on the frame 101; an oil tank 61, which is arranged in the middle of the vehicle body 1 and is located between a plurality of guide pillars 11; a hydraulic radiator 8, which is arranged in the middle of the vehicle body 1, and the hydraulic radiator 8 is located on one side of the oil tank 61, and the hydraulic radiator 8 is used to cool the hydraulic system.

[0023] In the above scheme, the frame 101 serves as the basic structure of the vehicle body 1 and carries other components. The wheel 103 is rotatably mounted on the frame 101. Before the controllable seismic source moves to the working point, the wheel 103 is responsible for supporting the entire vehicle body 1 and realizing the moving function. When reaching the working point, the lifting actuator 10 lifts the frame 101 and the wheel 103 leaves the ground. The power assembly mechanism 5 is mounted on the frame 101 to provide power for the operation of the entire controllable seismic source, including the energy required for the operation of the lifting actuator 10 and the up and down reciprocating motion of the vehicle body 1. The oil tank 61 is located in the middle of the vehicle body 1 and between the guide columns 11. During operation, the fuel tank 6 provides fuel for the power assembly mechanism 5, and the hydraulic oil tank 7 provides hydraulic oil for the lifting actuator 10 to ensure the normal operation of each component. The hydraulic radiator 8 cools the hydraulic system when the device is working. For example, during long-term or high-intensity work, the powertrain mechanism 5 generates heat during operation, and the hydraulic oil circulates in the lifting actuator 10 and also generates heat. The hydraulic radiator 8 maintains the temperature of the hydraulic system within an appropriate range through heat dissipation, thereby ensuring the stability and reliability of the equipment and preventing component damage or performance degradation due to overheating.

[0024] The load-bearing capacity of the frame 101 ensures the stability of the entire device under different working conditions, and the liftable design of the wheels 103 facilitates the movement and positioning of the equipment. The power assembly mechanism 5 provides stable power, and the cooperation of the oil tank 61 and the hydraulic radiator 8 ensures the continuous operation and heat dissipation requirements of the equipment, improves the adaptability and work efficiency of the equipment in complex outdoor environments, reduces downtime caused by overheating and other problems, and helps to improve the overall progress of seismic exploration operations.

[0025] Furthermore, the oil tank 61 includes a fuel tank 6 and a hydraulic oil tank 7 . The hydraulic oil tank 7 is connected to the lifting actuator 10 . The hydraulic oil tank 7 is used to provide hydraulic oil to the lifting actuator 10 .

[0026] In the above scheme, during the entire operation of the controllable vibrator, the fuel tank 6 continuously supplies fuel to the power assembly mechanism 5 to maintain the normal operation of the power assembly mechanism 5, and provide power support for the movement of the lifting actuator 10, the guide column 11, and the up and down reciprocating movement of the vehicle body 1. The hydraulic oil tank 7 is connected to the lifting actuator 10. When the lifting actuator 10 needs to work, the hydraulic oil in the hydraulic oil tank 7 enters the oil cylinder of the lifting actuator 10 under pressure, pushing the piston rod to move, and realizing the downward movement of the contact plate 9 and the lifting of the vehicle body 1. During the up and down reciprocating movement of the vehicle body 1, the hydraulic oil circulates continuously in the lifting actuator 10, and the hydraulic oil tank 7 plays the role of storing and replenishing the hydraulic oil, ensuring that the lifting actuator 10 can work stably and accurately according to the control requirements.

[0027] In general, the present invention proposes an ultra-low frequency controllable seismic source device that uses the body mass as the inertial mass, including a frame 101, a bridge frame 2, a gearbox 3 (including a motor), a cab 4, a power assembly mechanism 5 (including a hydraulic pump), a fuel tank 6, a hydraulic oil tank 7, a hydraulic radiator 8, a ground contact plate 9, a lifting actuator 10, a guide column 11, an upper frame 12, and installation structures of other related parts.

[0028] The frame 101 is equipped with a gearbox 3 (including a motor), a bridge 2, a cab 4, a powertrain mechanism 5 (including a hydraulic pump), a fuel tank 6, a hydraulic oil tank 7, a hydraulic radiator 8, and other related parts, which together form a body; a guide column sleeve 102 is provided in the middle of the frame 101, a guide column 11 is installed in the middle of the guide column sleeve 102, the lower end of the guide column 11 is connected to and installed with a ground contact plate 9, and the upper end of the guide column 11 is connected to and installed with an upper frame 12; the ground contact plate 9 and the frame 101 are connected through a lifting actuator 10. When working, the controllable seismic source stops at the working point, the piston rod of the lifting actuator 10 extends, the ground contact plate 9 connects the guide column 11, the upper frame 12 drops and couples with the ground, the piston rod of the lifting actuator 10 continues to extend, the frame 101 and the parts installed on the frame 101 are lifted, the tire leaves the ground to a preset height, and the piston rod of the lifting actuator 10 stops extending. By changing the control of the lifting actuator 10, the frame 101 and the components installed on the frame 101 are controlled to reciprocate up and down as a whole according to the preset ultra-low frequency (during the movement, the tire does not contact the ground). Due to the coupling between the ground surface and the contact plate 9, under the reaction force of the contact plate 9, the earth generates seismic waves, achieving the purpose of the controllable seismic source to generate seismic waves. After the work is completed, the control mode of the lifting actuator 10 is changed, the piston rod of the lifting actuator 10 is retracted, the frame 101 and the components installed on the frame 101 are lowered, the tire is compacted on the ground, the piston rod of the lifting actuator 10 continues to retract, the contact plate 9 is connected to the guide column 11, and the upper frame 12 is disconnected from the ground and lifted, until the contact plate 9 is lifted to a preset height, and the controllable seismic source can move away from the working point.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An ultra-low frequency controllable vibrator, characterized in that: include: Car body (1); A plurality of guide pillars (11), wherein the plurality of guide pillars (11) are arranged at intervals and slidably disposed in the middle of the vehicle body (1); A ground contact plate (9) disposed at the bottom of the guide column (11); A lifting actuator (10) is arranged on the vehicle body (1), and the lifting actuator (10) has a piston rod, and the piston rod is hinged on the ground contact plate (9). The lifting actuator (10) is used to drive the ground contact plate (9) to move downward to contact the ground, and the lifting actuator (10) is also used to lift the vehicle body (1) off the ground. After the vehicle body (1) leaves the ground, the vehicle body (1) serves as an inertial mass block of the lifting actuator (10).

2. The ultra-low frequency controllable vibrator according to claim 1, characterized in that: Also includes: A plurality of guide column sleeves (102), wherein the plurality of guide column sleeves (102) are symmetrically arranged at the corners of the middle part of the vehicle body (1), and each guide column (11) is slidably arranged in one of the guide column sleeves (102); An upper frame (12) is arranged on the top of the plurality of guide pillars (11), and the upper frame (12) is used to fix the tops of the plurality of guide pillars (11).

3. The ultra-low frequency controllable vibrator according to claim 1, characterized in that: The vehicle body (1) comprises: Frame (101); There are a plurality of wheels (103), each of which is rotatably disposed on the frame (101); after the lifting actuator (10) lifts up the frame (101), the wheels (103) leave the ground to a preset height; A power assembly mechanism (5) is arranged on the vehicle frame (101); An oil tank (61) is arranged in the middle of the vehicle body (1) and is located between a plurality of the guide pillars (11); A hydraulic radiator (8) is arranged in the middle of the vehicle body (1), and the hydraulic radiator (8) is located on one side of the oil tank (61). The hydraulic radiator (8) is used to cool the hydraulic system.

4. The ultra-low frequency controllable vibrator according to claim 3, characterized in that: The oil tank (61) comprises a fuel tank (6) and a hydraulic oil tank (7); the hydraulic oil tank (7) is connected to the lifting actuator (10); the hydraulic oil tank (7) is used to provide hydraulic oil to the lifting actuator (10).

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