Secondary ballasting structure for transverse wave vibroseis of rotary vibrator

Abstract

The invention discloses a secondary ballasting structure for a transverse wave vibroseis of a rotary vibrator, and relates to the technical field of seismic exploration of petroleum, natural gas and the like. Comprising a vehicle body; the vibrator is connected to the vehicle body, and a vibrator flat plate is arranged at the vibration end of the vibrator; the two lifting oil cylinders are arranged on the left side and the right side of the vehicle body, and lower pressing plates are mounted on first piston rods of the two lifting oil cylinders; the lifting component is mounted on the lower pressing plate, an elastic roller mounting frame is arranged at the output end of the lifting component, a cross shaft is arranged on the elastic roller mounting frame, and a first elastic roller and a second elastic roller are arranged on the cross shaft at intervals; the left side and the right side of the vehicle body are further provided with two bosses, and the bosses are fixedly installed on the vibrator flat plate. According to the vibration isolator, the function of reducing the pressure borne by the vibration isolator on the top of the vibrator is achieved, and damage to the vibration isolator on the top of the vibrator due to the fact that the pressure borne by the vibration isolator is too large is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic exploration such as oil and natural gas, and specifically to a secondary weight structure for a shear-wave vibrator of a rotary vibrator. Background Art

[0002] In the field of oil and natural gas exploration, the shear wave in seismic waves is very suitable for oil and natural gas exploration due to its unique properties. A shear-wave vibrator is an artificial seismic signal excitation source for exciting shear waves. By making the vibration direction of the vibrator perpendicular to the wave propagation direction, shear waves are generated. A shear-wave vibrator is an important technology in seismic exploration. It can obtain information about underground media by exciting shear waves, and then be used for geological exploration and oil and gas resource development. It is an essential seismic wave excitation device for seismic exploration work. Among them, the vibrator plate on the shear-wave vibrator directly contacts the ground, and its function is to transmit the shear waves excited by the vibrator to the earth. The quality of the transmission effect is directly related to the coupling effect between the plate and the earth. Before the vibrator performs the vibration operation, a part of the weight of the vibrator vehicle body needs to be used as pressure acting on the vibrator to ensure good coupling between the vibrator plate and the ground, so that this pressure becomes the necessary weight.

[0003] Since the current shear-wave vibrator needs to rotate to excite shear waves in two directions, the pressure acting on the vibrator acts on the top of the vibrator through the vibration isolation rubber on the top of the vibrator. This results in the pressure being only distributed on the top of the vibrator and not being able to act on the plate simultaneously, and the distribution of the pressure on the vibrator is uneven. This not only reduces the coupling degree between the plate and the earth and affects the excitation effect of the shear-wave vibrator, but also causes excessive pressure on the vibration isolation rubber on the top of the vibrator, resulting in serious deformation of the rubber and affecting the vibration isolation performance of the vibration isolation rubber. To solve this technical problem, a secondary weight structure for a shear-wave vibrator of a rotary vibrator is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a secondary weight structure for a shear-wave vibrator of a rotary vibrator. The present invention ensures that the weight of the shear-wave vibrator is evenly distributed between the top of the vibrator and the vibrator plate, and at the same time ensures that there is no interference between the vibrator and the plate during rotation, reducing the deformation and damage of the rubber on the top of the vibrator, thereby improving the coupling between the shear-wave vibrator plate and the earth and ensuring the excitation effect of the shear-wave vibrator.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A secondary weight structure for a shear-wave vibrator of a rotary vibrator, comprising: a vehicle body;

[0007] A vibrator connected to the vehicle body, with a vibrator flat plate provided at the vibrating end of the vibrator;

[0008] Two lifting cylinders arranged on the left and right sides of the vehicle body, with lower pressing plates installed on the first piston rods of the two lifting cylinders;

[0009] A lifting component installed on the lower pressing plate, with an elastic roller mounting bracket provided at the output end of the lifting component, a cross shaft provided on the elastic roller mounting bracket, and a first elastic roller and a second elastic roller arranged at intervals on the cross shaft; two bosses are also provided on the left and right sides of the vehicle body, and the bosses are fixedly installed on the vibrator flat plate.

[0010] In this solution, through the pressure generated on the vibrator flat plate, part of the pressure concentrated on the top of the vibrator is distributed onto the vibrator flat plate of the vibrator. At the same time, the structures of the first elastic roller, the second elastic roller, and the cross shaft meet the vibration isolation requirements between the vibrator flat plate and the vehicle body, realizing the function of reducing the pressure on the vibration isolation pad at the top of the vibrator, avoiding damage to the vibration isolation pad at the top of the vibrator caused by excessive pressure, and also realizing the vibration isolation between the secondary ballast structure and the vibrator flat plate.

[0011] As a further solution of the present invention: the first elastic roller and the second elastic roller on the cross shaft on the left and right sides of the vehicle body are arranged in the same direction.

[0012] As a further solution of the present invention: the radius of the first elastic roller is greater than the radius of the second elastic roller.

[0013] As a further solution of the present invention: the height of the boss is greater than the radius difference between the second elastic roller and the first elastic roller.

[0014] As a further solution of the present invention: a vibration isolation pad is also connected between the vehicle body and the vibrator.

[0015] As a further solution of the present invention: an elastic roller mounting bracket is installed on the second piston rod, and the cross shaft is installed on the elastic roller mounting bracket.

[0016] As a further solution of the present invention: the first elastic roller and the second elastic roller are each rotatably arranged on the cross shaft along the mounting shaft.

[0017] As a further solution of the present invention: the elastic roller mounting bracket is fixedly installed on the second piston rod by bolts.

[0018] As a further solution of the present invention: the first elastic roller and the second elastic roller are both rubber rollers.

[0019] As a further solution of the present invention: the vibration isolation pad is made of rubber.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: By applying the pressure generated by the vibrator plate, the pressure concentrated on the top of the vibrator is partially distributed onto the vibrator plate of the vibrator. At the same time, the structures of the first elastic roller, the second elastic roller, and the cross shaft meet the vibration isolation requirements between the vibrator plate and the vehicle body, realizing the function of reducing the pressure on the vibration isolation pad at the top of the vibrator, avoiding damage to the vibration isolation pad at the top of the vibrator caused by excessive pressure, and also realizing the vibration isolation between the secondary weight structure and the vibrator plate. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the secondary weight structure of a shear wave vibrator for a rotary vibrator.

[0022] Figure 2 It is a schematic structural diagram of the lifting component in the secondary weight structure of a shear wave vibrator for a rotary vibrator.

[0023] Figure 3 It is a schematic structural diagram of the elastic roller mounting bracket in the secondary weight structure of a shear wave vibrator for a rotary vibrator.

[0024] Figure 4 It is a working schematic diagram of the secondary weight structure of a shear wave vibrator for a rotary vibrator Figure 1 .

[0025] Figure 5 It is a working schematic diagram of the secondary weight structure of a shear wave vibrator for a rotary vibrator Figure 2 .

[0026] In the figure: 1 - lifting oil cylinder, 2 - first piston rod, 3 - lifting component, 4 - lower pressing plate, 5 - second piston rod, 6 - elastic roller mounting bracket, 7 - first elastic roller, 8 - second elastic roller, 9 - vehicle body, 10 - vibration isolation pad, 11 - vibrator, 12 - vibrator plate, 13 - convex platform, 14 - cross shaft. Detailed Embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] When a prior art rotatable shear wave vibrator needs to perform vibration work, the vibrator 11 is lowered by extending the piston rod 2 of the lifting cylinder 1 until the flat plate 12 contacts the ground and reaches a preset fixed pressure. At this time, all the pressure acts on the vibrator 11 through the vibration isolation pad 10 at the top of the vibrator 11, enabling the vibrator 11 to compact the ground. However, this method easily causes the vibration isolation pad 10 at the top of the vibrator 11 to bear excessive compressive weight, resulting in excessive deformation of the vibration isolation pad 10 and damage to the vibration isolation pad 10. At the same time, all the pressure acting on the vibrator 11 through the vibration isolation pad 10 at the top of the vibrator 11 is also not conducive to the good coupling between the vibrator flat plate 12 and the ground, thus affecting the shear wave excitation effect. To solve this technical problem, a secondary compressive weight structure for a rotatable shear wave vibrator is proposed herein.

[0029] Hereinafter, the technical solution of the present invention will be further elaborated through specific embodiments of a secondary compressive weight structure for a rotatable shear wave vibrator of the present invention.

[0030] Please refer to Figures 1 to 5 , in the embodiment of the present invention, a secondary compressive weight structure for a rotatable shear wave vibrator is disclosed, including a vehicle body 9 and a vibrator 11 detachably connected to the vehicle body 9. In one or more embodiments of the present invention, the vehicle body 9 and the vibrator 11 can be connected by mechanical connection means known to those skilled in the art, which will not be elaborated herein. Continuing to refer to the attached Figure 1 , lifting cylinders 1 are installed on both the left and right sides of the vehicle body 9. The lifting cylinders 1 can provide power for the reciprocating movement of the first piston rod 2, and a lower pressing plate 4 is also installed on the first piston rod 2 of the lifting cylinders 1.

[0031] Continuing to refer to Figure 1 , a vibrator flat plate 12 is provided at the vibration end of the vibrator 11 for contacting the ground to apply vibration to the ground. A lifting member 3 is provided on the lower pressing plate 4. The cylinder part of the lifting member 3 can be fixedly installed on the lower pressing plate 4, and an elastic roller mounting bracket 6 is provided at the output end of the lifting member 3. For the elastic roller mounting bracket 6, as Figures 2 - 3 shown, a cross shaft 14 is provided on the elastic roller mounting bracket 6. The first elastic roller 7 and the second elastic roller 8 are arranged at intervals on the cross shaft 14, and the first elastic roller 7 and the second elastic roller 8 rotate around the axes in different directions of the cross shaft 14 respectively. Continuing as Figure 1 shown, two bosses 13 are also provided on the front and rear sides of the vehicle body 9, and the bosses 13 can be formed on the vibrator flat plate 12 by means of fixed installation or molding.

[0032] It should be noted that referring to the attached Figure 2, the first elastic rollers 7 on the cross shaft 14 on the left side of the vehicle body 9 and the first elastic rollers 7 on the cross shaft 14 on the right side of the vehicle body 9 are arranged in the same direction; at the same time, the second elastic rollers 8 on the cross shaft 14 on the left side of the vehicle body 9 and the second elastic rollers 8 on the cross shaft 14 on the right side of the vehicle body 9 are arranged in the same direction. In this way, the rotation processes of the first elastic rollers 7 and the second elastic rollers 8 on the left and right cross shafts 14 can be kept consistent.

[0033] In the embodiment of the present invention, continue to refer to the attached Figure 2 , where the radius of the first elastic roller 7 is greater than the radius of the second elastic roller 8.

[0034] In the embodiment of the present invention, in combination with the attached Figures 4 - 5 working state of the rotary vibrator, where the height of the boss 13 should be greater than the radius difference between the second elastic roller 8 and the first elastic roller 7.

[0035] In the embodiment of the present invention, refer to Figure 1 It can be seen that a vibration isolation pad 10 is also connected between the vehicle body 9 and the vibrator 11 to reduce the impact of vibration on the vehicle body 9.

[0036] In the embodiment of the present invention, continue to refer to Figure 1 , the lifting member 3 can be a hydraulic cylinder, and the lifting member 3 includes a second piston rod 5. The elastic roller mounting bracket 6 is arranged on the second piston rod 5, and power is provided to the second piston rod 5 through the lifting member 3 to drive the movement of the elastic roller mounting bracket 6. In other embodiments of the present invention, the lifting member 3 can also be an electric telescopic rod.

[0037] Specifically, referring to the working state diagrams shown in Figure 4 and Figure 5 , when the vibrator is working, part of the pressure of the lifting oil cylinder 1 on the vibrator 11 can act on the vibrator plate 12 through the secondary weight structure, thereby reducing the pressure of the lifting oil cylinder 1 acting on the top of the vibrator 11 and making the pressure distribution on the vibrator 11 more uniform. When the vibrator 11 vibrates left and right, the vibrator plate 12 will also vibrate left and right and slightly up and down. The left and right vibrations of the vibrator plate 12 are offset by the rolling of the first elastic roller 7 relative to the cross shaft 14, and the slight up and down vibrations are offset by the radial deformation of the first elastic roller 7, thereby forming vibration isolation between the vibrator 11 and the vehicle body 9.

[0038] It should be noted that, as Figure 4As shown in the figure, when the vibrator 11 needs to vibrate left and right relative to the vehicle body 9, the boss 13 of the vibrator plate 12 is located in the front-rear direction of the vehicle body 9, and there is no boss at the position of the vibrator plate 12 corresponding to the secondary counterweight. The piston rod 2 of the lifting oil cylinder 1 extends to lower the vibrator 11. After the vibrator plate 12 touches the ground, a fixed pressure is applied to the vibrator 11. This pressure acts on the vibrator 11 through the vibration isolation pad 10 at the top of the vibrator 11, so that the vibrator 11 is compacted on the ground. After that, the second piston rod 5 of the lifting component 3 of the secondary counterweight structure extends, and the large rubber wheel 7 contacts the vibrator plate 12 and reaches a predetermined pressure. Since the diameter of the small rubber wheel 8 is small, it will not contact the vibrator plate 12. At this time, part of the pressure of the lifting oil cylinder 1 on the vibrator acts on the vibrator plate 12 through the secondary counterweight structure, reducing the pressure of the lifting oil cylinder 1 acting on the top of the vibrator 11 and making the pressure distribution on the vibrator 11 more uniform. When the vibrator 11 vibrates left and right, the vibrator plate 12 will also generate left and right vibrations and slight up and down vibrations. The left and right vibrations of the vibrator plate 12 are offset by the rolling of the large rubber wheel 7 relative to the cross shaft 14, and the slight up and down vibrations are offset by the radial deformation of the large rubber wheel 7, thereby forming vibration isolation between the vibrator 11 and the vehicle body 9.

[0039] As Figure 5As shown, when the vibrator 11 vibrates back and forth relative to the vehicle body 9, the vibrator 11 needs to rotate 90 degrees relative to the vehicle body 9 in a lifted state. Before rotation, the second piston rod 5 of the lifting member 3 retracts, driving the rubber wheel mounting bracket 6 to ensure that the first elastic roller 7 disengages from the vibrator flat plate 12, avoiding interference between the vibrator and the flat plate during rotation. After rotation, the boss 13 of the vibrator flat plate 12 is located directly below the left and right sides of the vehicle body 9 and under the secondary counterweight structure. Then, the first piston rod 2 of the lifting cylinder 1 extends to lower the vibrator 11 until the vibrator flat plate 12 contacts the ground and applies a fixed pressure to the vibrator 11. This pressure acts on the vibrator 11 through the vibration isolation pad 10 at the top of the vibrator 11, pressing the vibrator 11 firmly onto the ground. Thereafter, the second piston rod 5 of the lifting member 3 of the secondary counterweight structure extends, and the second elastic roller 8 contacts the boss 13 on the vibrator flat plate 12 and reaches a predetermined pressure. Since the height of the boss 13 is greater than the radius difference between the second elastic roller 8 and the first elastic roller 7, the first elastic roller 7 does not contact the vibrator flat plate 12. At this time, part of the pressure on the top of the vibrator 11 by the lifting cylinder 1 acts on the vibrator flat plate 12 through the secondary counterweight structure, thereby reducing the pressure exerted by the lifting cylinder 1 on the top of the vibrator 11 and making the pressure distribution on the vibrator 11 more uniform. When the vibrator 11 vibrates back and forth, the vibrator flat plate 12 also generates back-and-forth vibrations and slight up-and-down vibrations. The back-and-forth vibrations of the vibrator flat plate 12 are offset by the rolling of the second elastic roller 8 relative to the cross shaft 14, and the slight up-and-down vibrations are offset by the radial deformation of the second elastic roller 8, thereby forming vibration isolation between the vibrator 11 and the vehicle body 9.

[0040] In the present invention, through the pressure generated by the vibrator flat plate 12, part of the pressure concentrated on the top of the vibrator 11 is distributed onto the vibrator flat plate 12 of the vibrator 11. At the same time, the structures of the first elastic roller 7, the second elastic roller 8, and the cross shaft 14 meet the vibration isolation requirements between the vibrator flat plate 12 and the vehicle body 9, realizing the function of reducing the pressure on the vibration isolation pad 10 at the top of the vibrator 11, avoiding damage to the vibration isolation pad 10 at the top of the vibrator 11 due to excessive pressure, and also realizing vibration isolation between the secondary counterweight structure and the vibrator flat plate 12.

[0041] The present invention can ensure that the controllable seismic source counterweight is simultaneously distributed to the top of the vibrator and the vibrator flat plate 12 of the vibrator, without interfering with the rotation of the vibrator, and can realize vibration isolation between the secondary counterweight structure and the vibrator flat plate 12, thereby reducing the deformation damage of the vibration isolation rubber at the top of the vibrator caused by excessive counterweight pressure, enabling the vibrator flat plate to better couple with the ground and ensuring the shear wave excitation effect.

[0042] In the embodiment of the present invention, an elastic roller mounting bracket 6 is installed on the second piston rod 5, and the cross shaft 14 is installed on the elastic roller mounting bracket 6.

[0043] In an embodiment of the present invention, the first elastic roller 7 and the second elastic roller 8 are each rotatably arranged on the cross shaft 14 along the mounting shaft.

[0044] In an embodiment of the present invention, the elastic roller mounting bracket 6 can be fixedly mounted on the second piston rod 5 by bolts. This setting is easy to implement.

[0045] In an embodiment of the present invention, both the first elastic roller 7 and the second elastic roller 8 can be rubber rollers. The vibration isolation pad 10 can also be made of rubber.

[0046] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0047] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed" and other terms shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0050] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A secondary weight structure for a shear wave vibrator of a rotary vibrator, comprising: A vehicle body; A vibrator connected to the vehicle body, and a vibrator plate is provided at the vibrating end of the vibrator; Two lifting cylinders arranged on the left and right sides of the vehicle body, and a lower pressing plate is installed on the first piston rod of each of the two lifting cylinders; It is characterized in that a lifting component is installed on the lower pressing plate, an elastic roller mounting bracket is provided at the output end of the lifting component, a cross shaft is provided on the elastic roller mounting bracket, a first elastic roller and a second elastic roller are arranged at intervals on the cross shaft, and the first elastic roller and the second elastic roller have different radii; Two convex platforms are further provided on the left and right sides of the vehicle body, and the convex platforms are fixedly installed on the vibrator plate.

2. The secondary weight structure of the shear wave vibrator for a rotary vibrator according to claim 1, characterized in that, The arrangement directions of the first elastic rollers and the second elastic rollers on the cross shafts on the left and right sides of the vehicle body are the same.

3. The secondary weight structure of the shear wave vibrator for a rotary vibrator according to claim 1, characterized in that, The radius of the first elastic roller is greater than the radius of the second elastic roller.

4. The secondary weight structure of the shear wave vibrator for a rotary vibrator according to claim 3, characterized in that, The height of the convex platform is greater than the radius difference between the second elastic roller and the first elastic roller.

5. The secondary weight structure of the shear wave vibrator for a rotary vibrator according to claim 1, characterized in that, A vibration isolation pad is further connected between the vehicle body and the vibrator.

6. The secondary weight structure of the shear wave vibrator for a rotary vibrator according to claim 1, characterized in that, An elastic roller mounting bracket is installed on the second piston rod, and the cross shaft is installed on the elastic roller mounting bracket.

7. The secondary weight structure of the shear wave vibrator for a rotary vibrator according to claim 1, characterized in that, The first elastic roller and the second elastic roller are each rotatably arranged on the cross shaft along the mounting shaft.

8. The secondary weight structure of the shear wave vibrator for a rotary vibrator according to claim 1, characterized in that, The elastic roller mounting bracket is fixedly installed on the second piston rod by bolts.

9. The secondary weight structure of the shear wave vibrator for a rotary vibrator according to claim 1, characterized in that, Both the first elastic roller and the second elastic roller are rubber rollers.

10. The secondary weight structure of the shear wave vibrator for rotary vibrator according to claim 5, characterized in that, The vibration isolation pad is a rubber vibration isolation pad.

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