Controllable source frequency divider vibrator and controllable source

Abstract

The application provides a controllable source frequency division vibrator and a controllable source, and relates to the technical field of oil and gas exploration. The controllable source frequency division vibrator comprises a support structure, a weight assembly and a floating air bag. The support structure has a bottom plate, a column assembly and a support beam. The weight assembly comprises at least a main weight and an intermediate weight. The main weight is used for reciprocating vibration in the direction perpendicular to the bottom plate. The intermediate weight is arranged above the main weight. The floating air bag is arranged on the support beam and has different floating heights. When the floating air bag has a first floating height, the intermediate weight is away from the main weight, and the controllable source frequency division vibrator is in a first excitation mode. When the floating air bag has a second floating height, the floating air bag does not lift the intermediate weight, and the intermediate weight is pressed on the main weight, and the controllable source frequency division vibrator is in a second excitation mode. The first excitation mode and the second excitation mode at least partially do not coincide in frequency band width.

Description

Technical Field

[0001] This application relates to the field of oil and gas exploration technology, and in particular to a controllable source frequency divider vibrator and a controllable source. Background Technology

[0002] Currently, conventional controllable seismic sources (linear scan start frequency above 6Hz) have been used in oil and gas exploration for over half a century, resulting in a series of mature products ranging from small to large tonnages, playing a leading role in green oil and gas exploration. However, as oil and gas exploration expands to greater depths, thin interbedded layers, and complex areas, conventional controllable seismic sources are no longer adequate to meet exploration needs. In existing technologies, oil and gas deposits in western exploration areas are relatively deep, and low-frequency signals have strong penetration capabilities into the formation. With the increasing demand for low-frequency signals for background noise suppression in oil and gas exploration in western areas and other exploration areas, low-frequency controllable seismic sources (linear scan start frequency as low as 1.5Hz) are gaining popularity, gradually replacing conventional controllable seismic sources and leading to their widespread application. However, both conventional and low-frequency controllable seismic sources essentially rely on a single inherent characteristic (natural frequency) excitation mode, which is somewhat unsatisfactory in adapting to complex and diverse exploration formations. Current low-frequency controllable vibrating sources are inferior to conventional controllable vibrating sources in terms of high-frequency excitation performance. A 1Hz decrease in low frequency results in a loss of over ten hertz in high frequency. Furthermore, lowering the frequency of the controllable source reduces the high-frequency response amplitude, making it susceptible to noise and suppression. Therefore, providing a controllable vibrating source that can simultaneously achieve effective excitation across different frequency bands is a pressing technical problem. Utility Model Content

[0003] This application provides a controllable source frequency division vibrator and a controllable source, the technical solution of which is as follows:

[0004] Firstly, to solve the aforementioned technical problems, this application provides a controllable source frequency division vibrator, comprising: a support structure having a base plate, a column assembly, and a support beam; the base plate being used to adhere to the ground; the support beam being fixed to the base plate via the column assembly and also parallel to the base plate; a counterweight assembly including at least a main counterweight and an intermediate counterweight; the main counterweight being movably connected to the base plate and used to reciprocate in a direction perpendicular to the base plate to transmit vibration to the ground via the base plate; and the intermediate counterweight being positioned above the main counterweight; and a floating airbag. The floating airbag is placed on a support beam, with the floating airbag located on the side of the intermediate weight facing the main weight. The floating airbag has different floating heights. When the floating airbag has a first floating height, it lifts the intermediate weight, moving it away from the main weight, and the controllable source frequency divider vibrator is in the first excitation mode. When the floating airbag has a second floating height, it does not lift the intermediate weight, and the intermediate weight presses against the main weight, and the controllable source frequency divider vibrator is in the second excitation mode. The first excitation mode and the second excitation mode do not overlap in at least part of their frequency bandwidth.

[0005] In this embodiment, the counterweight assembly further includes: a floating counterweight, which is located above the floating airbag and is detachably connected to the intermediate counterweight; when the floating airbag has a first floating height and the floating counterweight and the intermediate counterweight are connected, the floating airbag lifts the intermediate counterweight and the floating counterweight, moving the intermediate counterweight and the floating counterweight away from the main counterweight, and the controllable source frequency divider vibrator is in a first excitation mode; when the floating airbag has a first floating height, the floating counterweight and the intermediate counterweight are detached, the intermediate counterweight is pressed against the main counterweight, and the floating counterweight is away from the main counterweight, the controllable source frequency divider vibrator is in a second excitation mode; when the floating airbag has a second floating height and both the floating counterweight and the intermediate counterweight are pressed against the main counterweight, the controllable source frequency divider vibrator is in a third excitation mode.

[0006] In this embodiment, the main weight has a first surface and two second surfaces adjacent to the first surface; there are two intermediate weights, which are symmetrically arranged at both ends of the first surface along a first direction; each intermediate weight includes a first part, which has a third surface facing the main weight and a fourth surface facing the floating weight, both of which are surfaces parallel to the first surface of the main weight; the first part is used to be placed on the first surface of the main weight and is detachably connected to the first surface of the main weight; or the intermediate weight includes a first part and a second part, the thickness of the first part is greater than the thickness of the second part, the first part and the second part are connected to form an L-shaped structure, the first part has a third surface facing the main weight and a fourth surface facing the floating weight, both of which are surfaces parallel to the first surface of the main weight; the first part is used to be placed on the first surface of the main weight and is detachably connected to the first surface of the main weight, and the second part is used to be detachably connected to the second surface; wherein, the first direction is the direction of the line connecting the center points of the two second surfaces.

[0007] In this embodiment, the floating weight includes two third parts and two fourth parts. Each third part is detachably connected to the two fourth parts on both sides along the first direction. Each third part is symmetrically arranged along the first direction. The two third parts and the two fourth parts are connected in sequence to form a ring structure. The side of the third part near the main weight has a protrusion of a preset height relative to the side of the fourth part near the middle weight. The third part is arranged corresponding to at least part of the main weight and is used for detachable connection with the main weight. The fourth part is arranged corresponding to at least part of the first part and is used for detachable connection with the first part. The third part has a fifth surface facing the main weight, and the fourth part has a sixth surface facing the middle weight. Both the fifth and sixth surfaces are planes parallel to the first surface.

[0008] In this embodiment, the first surface of the main weight, the first part of the intermediate weight, and the fourth part of the floating weight are detachably connected by a first connector. The first connector includes a first rod-shaped structure, a second rod-shaped structure, a third rod-shaped structure, and a fourth rod-shaped structure arranged sequentially along the length direction. At least the first rod-shaped structure and the fourth rod-shaped structure have external threads. The third rod-shaped structure has a tightening part located between the first end and the second end of the third rod-shaped structure and close to the second rod-shaped structure, so as to tighten the first rod-shaped structure and the main weight through the tightening part.

[0009] In this embodiment, the first face of the main weight and the first part of the intermediate weight are detachably connected by a second connector; the second connector includes an external hexagonal head screw; the main weight has a first threaded hole perpendicular to the first face; the intermediate weight has a first connecting hole penetrating the first part along the thickness direction of the first part, the external hexagonal head screw passes through the first connecting hole and is threadedly connected to the first threaded hole, the first connecting hole includes an inner countersunk hole near the fourth face, the diameter of the inner countersunk hole is adapted to the fastening sleeve of the external hexagonal head screw.

[0010] In this embodiment, the device further includes: a first limiting block disposed between the base plate and the main weight; and / or the first limiting block disposed on the side of the main weight facing the floating weight; and a second limiting block disposed on the support beam, adjacent to the floating airbag and located between the support beam and the floating weight. In this embodiment, the floating airbag includes multiple floating airbags, each having a floating pressure regulating valve and a first deflation valve. The floating pressure regulating valve is used to inflate the floating airbag, and the first deflation valve is used to deflate it. The controllable source frequency divider also includes multiple balancing airbags disposed between the base plate and the main weight. Each balancing airbag has a balancing pressure regulating valve and a second deflation valve. The balancing pressure regulating valve is used to inflate the balancing airbag, and the second deflation valve is used to deflate it.

[0011] Secondly, this application also provides a controllable vibration source, including the controllable vibration source frequency divider vibrator as described above; and a transport chassis, on which the controllable vibration source frequency divider vibrator is movably connected along the height direction, and the transport chassis is used to transport the controllable vibration source frequency divider vibrator. The controllable vibration source provided in this application includes the controllable vibration source frequency divider vibrator, and therefore includes all the technical features and effects of the controllable vibration source frequency divider vibrator as described above, which will not be repeated here.

[0012] This application provides a controllable source frequency-division vibrator and a controllable source. The controllable source frequency-division vibrator includes a weight assembly and a floating airbag. The weight assembly includes at least a main weight and a middle weight. By setting the floating airbag below the middle weight, the middle weight can be raised to different heights when the floating airbag has different floating heights. This allows the middle weight to be combined or separated from the main weight, resulting in at least two weight combinations: a first weight combination and a second weight combination. Thus, the first weight combination and the second weight combination can be used for scanning excitation, thereby enabling a single controllable source frequency-division vibrator to have at least two output energy characteristics, forming two stepped energy increments and enhancing the excitation energy. Simultaneously, the single natural frequency is transformed into two typical natural frequencies, which is more conducive to the wide-range absorption of excitation energy and improves the quality of the vibration signal. Superimposing the two frequency-division acquisition signals can achieve a better signal-to-noise ratio bandwidth, which is suitable for high-difficulty oil and gas exploration such as deep, ultra-deep, and thin interlayers. This allows the controllable source frequency-division vibrator to achieve better excitation effects of different frequency bands at the same time.

[0013] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A front view of a controllable source frequency divider vibrator in its first excitation mode, provided in this application;

[0016] Figure 2 A front view of a controllable source frequency divider vibrator in its second excitation mode, provided in this application;

[0017] Figure 3 A front view of another controllable source frequency divider vibrator provided in this application in its first excitation mode;

[0018] Figure 4 A front view of another controllable source frequency divider vibrator provided in this application in the second excitation mode;

[0019] Figure 5 A sectional view showing the connection between the main counterweight and the intermediate counterweight;

[0020] Figure 6 A front view of another controllable source frequency divider vibrator provided in this application in the third excitation mode;

[0021] Figure 7 A sectional view showing the connection between the main weight, intermediate weight, and floating weight;

[0022] Figure 8 The front view of the first connector provided in this application, and the cross-sectional views of AA, BB and CC in the front view;

[0023] Figure 9 A cross-sectional view of the intermediate counterweight provided in this application;

[0024] Figure 10 The front view of the floating weight provided in this application;

[0025] Figure 11 A top view of the floating weight provided in this application;

[0026] Figure 12 Front view of the first limiting block provided in this application;

[0027] Figure 13 The front view of the support structure provided in this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Controllable source frequency divider vibrator; 1. Weight assembly; 11. Main weight; 111. First surface; 112. Second surface; 12. Middle weight; 121. First part; 122. Second part; 13. Floating weight; 131. Third part; 132. Fourth part; 133. Rectangular opening; 2. Floating airbag; 3. Support structure; 31. Base plate; 32. Column assembly; 33. Support beam; 34. Top plate; 35. Piston rod; 4. First connector; 41. First rod-shaped structure; 42. Second rod-shaped structure; 43. Flat square; 44. Third rod-shaped structure; 441. Tightening part; 45. Washer; 46. First nut; 47. Fourth rod-shaped structure; 5. External hexagonal head screw; 6. First limiting block; 61. First metal sleeve; 7. Second limiting block; 8. Balance airbag. Detailed Implementation

[0030] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0031] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​described in these embodiments should be interpreted as merely exemplary and not as limiting. It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. Furthermore, the terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "comprising" or "including" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well. It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0032] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein. Techniques, methods, and apparatus known to one of ordinary skill in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

[0033] Currently, conventional controlled-source vibrators (linear scan starting frequency above 6Hz) have been used in oil and gas exploration for over half a century, resulting in a series of mature products ranging from small to large tonnages, playing a leading role in green oil and gas exploration. However, as oil and gas exploration expands to greater depths, thin interbedded layers, and complex areas, conventional controlled-source vibrators are no longer adequate for the demands of exploration. In existing technologies, oil and gas deposits in western exploration areas are relatively deep, and low-frequency signals have strong penetration capabilities into the formation. With the increasing demand for low-frequency signals for background noise suppression in oil and gas exploration in western areas and other exploration areas, low-frequency controlled-source vibrators (linear scan starting frequency as low as 1.5Hz) are gaining popularity, gradually replacing conventional controlled-source vibrators in large-scale applications. However, both conventional and low-frequency controlled-source vibrators essentially rely on a single inherent characteristic (natural frequency) excitation mode, which is somewhat unsatisfactory in adapting to complex and diverse exploration formations. The low-frequency controllable source vibrator currently in use is inferior to the conventional controllable source vibrator in terms of high-frequency excitation effect. If the low frequency drops by 1 Hz, the high frequency may be lost by more than 10 Hz. After the controllable source vibrator is made to be low-frequency, the high-frequency response amplitude is reduced, which makes it easy to be buried and produce high-frequency noise.

[0034] Therefore, this application provides a controllable source frequency division vibrator that can combine or separate at least two types of weights, so that a controllable source frequency division vibrator has at least two output energy characteristics, thereby enhancing the excitation energy in different frequency bands, improving the low-frequency and high-frequency effects of seismic acquisition data, obtaining a better signal-to-noise ratio bandwidth, and thus enabling the controllable source frequency division vibrator to simultaneously achieve better excitation effects in different frequency bands.

[0035] However, since the weight of the split part is relatively large, reaching more than 1.5 tons, and the maximum weight of a single piece is more than 500 kilograms (in order to avoid signal interference caused by fastening problems, the number of split part weights should be as small as possible), if it is unloaded from the vehicle, hoisting equipment is required, which presents the following problems: (1) The earthquake team's HSE (health, safety, and environmental) management has strict regulations on hoisting heavy objects. It is necessary to apply first and make corresponding safety plans and obtain approval before it can be carried out, which is a relatively complicated process. In recent years, earthquake teams have adopted high-efficiency acquisition methods, with dozens of controllable seismic sources. However, this hoisting method is too costly and poses significant safety hazards, making it difficult to implement. (2) The space for the frequency divider vibrator of the controllable seismic source is narrow. When removing the weight of the weight by hoisting equipment, it is necessary to remove the surrounding interfering components (such as lifting cylinders). Reinstalling it is even more difficult. Frequent back-and-forth disassembly and reassembly can easily damage related components or contaminate the hydraulic system. The process of hoisting, removing, and reinstalling the weight of the weight can also easily damage the mounting surface of the weight, affecting its use and causing trouble for maintenance. It is not very operable. (3) The surface environment of the exploration area is complex and there are often no roads. Vehicles are required to have good off-road capabilities, and ordinary hoisting vehicles are not easy to enter. (4) The removed weight needs to be reinstalled and secured in a suitable position on the controllable seismic source vehicle. Otherwise, it will change the weight of the controllable seismic source vibration plate, causing poor coupling between the plate and the ground and affecting the vibration signal. The removed weight of the weight will also increase additional management costs and may even be lost.

[0036] Therefore, this application provides a floating airbag configuration. By adjusting the floating height of the airbag, it is not necessary to remove or reinstall the intermediate counterweight. Simply adjusting the height of the airbag raises or lowers the counterweight, allowing for the combination or separation of multiple counterweights. This can be operated by a single person, is simple, safe, and economical, and is easy to promote on a large scale. Disassembling and moving the floating and intermediate counterweights will not interfere with or damage other structures, making operation more convenient. Furthermore, the floating airbag configuration effectively isolates vibration energy, preventing structural interference and vibration signal interference, ensuring reliable force distribution at the support points.

[0037] Firstly, such as Figure 1 and Figure 2 As shown, this application provides a controllable source frequency division vibrator 100, comprising:

[0038] The system comprises a support structure, a counterweight assembly 1, and a floating airbag 2. The support structure has a base plate, a column assembly, and a support beam 33. The base plate is used to fit against the ground, and the support beam 33 is fixed to the base plate through the column assembly and is also arranged parallel to the base plate. The counterweight assembly 1 includes at least a main counterweight and an intermediate counterweight 12. The main counterweight is movably connected to the base plate and is used to reciprocate in a direction perpendicular to the base plate to transmit the vibration to the ground through the base plate. The intermediate counterweight 12 is located above the main counterweight. The intermediate counterweight 12 is located above the floating airbag 2. The floating airbag 2 is located on the support beam and is situated on the side of the intermediate counterweight facing the main counterweight. The floating airbag has different floating heights when inflated or deflated. When the floating airbag 2 has a first floating height, it lifts the intermediate weight 12, which moves away from the main weight, and the controllable source frequency divider vibrator 100 is in the first excitation mode; when the floating airbag 2 has a second floating height, it does not lift the intermediate weight 12, which is pressed against the main weight, and the controllable source frequency divider vibrator 100 is in the second excitation mode; wherein, at least part of the frequency bandwidth of the first excitation mode and the second excitation mode do not overlap.

[0039] In this embodiment, the main weight 11 is a servo hydraulic cylinder with a servo hydraulic cavity inside. The cavity includes a first region and a second region. The first region and the second region are alternately powered so that the first region and the second region are alternately supplied with oil. Thus, after power is supplied, the main weight 11 can generate vibration in a direction perpendicular to the base plate 31.

[0040] like Figure 13 As shown, in this embodiment, the support structure 3 includes a base plate 31, at least two columns, a support beam 33, a top plate 34, and a piston rod. Preferably, the support structure 3 includes a base plate 31, four columns, a support beam 33, a top plate 34, and a piston rod. The support structure 3 is a rigid body as a whole. The material of the support structure can be low alloy steel, such as 16Mn, Q345, etc. The top plate 34, support beam 33, and bottom plate 31 are parallel to each other. The bottom plate 31 is used to support the counterweight assembly 1. Two sets of column assemblies 32 are spaced apart along a second direction perpendicular to the first direction. The second direction is also parallel to the bottom plate 31. The column assembly 32 includes two columns spaced apart along the first direction. One end of the column is perpendicularly connected to the bottom plate 31, and the other end is connected to the top plate 34. A support beam 33 is connected between the two columns. The height of the support beam 33 is between the height of the top plate 34 and the height of the bottom plate 31. A floating airbag 2 and a second limiting block 7 are provided on the support beam 33, so that the floating airbag 2 can be supported and placed. This allows the floating counterweight 13 and the middle counterweight 12 above the floating airbag 2 to be lifted by the floating airbag 2, realizing the disassembly and assembly of the counterweight assembly 1.

[0041] In this embodiment, a buffer pad is provided on the side of the top plate 34 facing the bottom plate 31. The buffer pad can prevent the upper surface of the floating weight 13 from rigidly colliding with the top plate 34, and avoid structural deformation or damage to the floating weight 13 and the support structure 3.

[0042] In this embodiment, the piston rod is a rigid structure, and the piston rod material can be alloy steel 40Cr, etc. The piston rod is installed through the main weight 11. One end of the piston rod 35 is perpendicularly connected to the base plate 31, and the other end is connected to the top plate. Thus, the main weight 11 can vibrate along the length of the piston rod 35, and the vibration is transmitted to the base plate 31 through the piston rod 35. The base plate 31 is in close contact with the ground, so the mechanical vibration can be transmitted to the surface medium through the base plate 31, causing the surface particles to vibrate synchronously. The surface vibration is transmitted underground in the form of elastic waves (longitudinal waves and transverse waves) through the interaction of the particles of the stratum medium (soil, rock), thus forming the seismic waves required for exploration. Therefore, the controllable source frequency divider vibrator 100 can emit seismic waves with controllable frequency and stable waveform to the strata. The seismic waves are reflected / refracted at the interfaces of different strata (sandstone, mudstone, oil and gas layers, etc.). The reflected signals are received by the ground detector, and the distribution of underground rock strata is inverted by combining geological data to determine whether there are oil and gas reservoir conditions.

[0043] In this embodiment, based on the current needs of oil and gas exploration and referencing the current status of mainstream large-tonnage controllable source vibrators, the masses of several typical weights of the large-tonnage controllable source vibrator are determined through overall system technical optimization. This determines the masses of the main weight 11 and the intermediate weight 12, with the main weight 11 having a greater mass than the intermediate weight 12. The weight assembly can be made of carbon steel, such as Q235A or 35. During its up-and-down movement, the main weight 11 has an upper stop point, a lower stop point, and a midpoint. The upper stop point is the highest point of the main weight 11's movement, the lower stop point is the lowest point, and the midpoint is the area between the upper and lower stop points. The intermediate weight 12 can be separated from the main weight 11, allowing the main weight 11 to vibrate independently; the main weight 11 and the intermediate weight 12 can also be combined and vibrate together. A larger mass of the vibrating weight results in a lower natural frequency, making it more suitable for low-frequency operations; conversely, a smaller mass of the vibrating weight results in a higher natural frequency, making it more suitable for high-frequency operations. The intermediate counterweight 12 can be a single unit, positioned above the main counterweight 1 or on the side wall of the main counterweight 11. The intermediate counterweight can also consist of two or more parts, positioned at different locations on the main counterweight 11. The shape of the intermediate counterweight 12 is not limited; it can be a plate-like structure, a block-like structure, an L-shaped structure, or an irregular structure, as long as it can be separated and combined with the main counterweight 11.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, a central counterweight 12 can be positioned above the floating airbag 2, allowing the central counterweight 12 to be raised or lowered. This avoids the aforementioned inconveniences of using hoisting equipment to lift the central counterweight 12, enabling one person to raise or lower the extremely heavy central counterweight 12. The lifting method is simple, efficient, and highly operable, making it suitable for large-scale application. It eliminates the need to drive cranes into complex exploration areas and to disassemble or reassemble related components, avoiding damage caused by frequent disassembly and reassembly, reducing safety hazards. It also saves space by eliminating the need for additional space requirements. Furthermore, since the central counterweight 12 does not need to be disassembled, there is no need to consider where to place it on the controllable vibration source vehicle to avoid altering the weight distribution on the base plate 31, thus preventing poor coupling between the base plate 31 and the bottom surface from affecting the vibration signal and avoiding the risk of losing the central counterweight 12 after disassembly.

[0045] In this embodiment, the floating airbag 2 can have different floating heights to lift the intermediate counterweight 12 positioned above the floating airbag 2, such as... Figure 1 As shown, when the floating airbag 2 has a first floating height, the floating airbag 2 can lift the intermediate weight 12 so that the intermediate weight 12 is away from the main weight, so that the weight that can vibrate is the first weight assembly formed by the main weight. The mass of the first weight assembly weight assembly 1 includes the mass M1 of the main weight, the acceleration is a1=F / M1, F is the vibration force, the vibrator's natural frequency is ω1, the linear scan starting frequency can be 6Hz or 8Hz, the controllable source frequency divider vibrator 100 is in the first excitation mode, the frequency range of the first excitation mode: the rated energy output can be between 6-120Hz or 8-120Hz, and the high frequency response can be up to 160Hz.

[0046] In this embodiment, such as Figure 2 As shown, when the floating airbag 2 has a second floating height, the floating airbag 2 does not lift the intermediate weight 12, and the intermediate weight 12 is pressed on the main weight. At this time, the weight that can vibrate is the second weight combination formed by the main weight and the intermediate weight 12. The second weight combination is the sum of the mass of the main weight of the weight assembly 1 and the mass of the intermediate weight 12, i.e., M1+M2. The acceleration is a2=F / (M1+M2), where F is the vibration force, the vibrator's natural frequency is ω2 (ω2<ω1), the linear scan starting frequency can be 1.0Hz or 1.5Hz or 3Hz, the controllable source frequency divider vibrator 100 is in the second excitation mode, and the frequency range of the second excitation mode is: the rated energy output can be between 1.0-120Hz or 1.5-120Hz or 3-120Hz, and the high frequency response can be up to 160Hz.

[0047] In this embodiment, when the floating airbag 2 has a first floating height, the intermediate weight 12 is far away from the main weight, so that the weight assembly 1 that can vibrate is only the main weight.

[0048] Therefore, the controllable source frequency divider vibrator 100 provided in this application includes a weight assembly 1 and a floating airbag 2. The weight assembly 1 includes at least a main weight and an intermediate weight 12. By setting the floating airbag 2 below the intermediate weight 12, the intermediate weight 12 can be raised to different heights when the floating airbag 2 has different floating heights, so that the intermediate weight 12 can be combined or separated from the main weight, so that there are at least two weight combinations: a first weight combination and a second weight combination. Thus, the first weight combination and the second weight combination can be used for scanning excitation respectively, so that a controllable source frequency divider vibrator 100 has at least two output energy characteristics, forming two stepped energy incremental outputs, which enhances the excitation energy. At the same time, the single natural frequency is also transformed into two typical natural frequencies, which is more conducive to the wide-range absorption of excitation energy and improves the quality of vibration signal. Superimposing the two frequency-division acquisition signals can achieve a better signal-to-noise ratio bandwidth, which is suitable for high-difficulty oil and gas exploration such as deep, ultra-deep, and thin interlayers. This allows the controllable source frequency-division vibrator 100 to achieve better excitation effects in different frequency bands at the same time.

[0049] like Figure 3 , Figure 4 and Figure 6 As shown in this embodiment, the counterweight assembly 1 includes a main counterweight, a middle counterweight 12, and a floating counterweight 13. The floating counterweight 13 is located above the floating airbag 2, and the floating counterweight 13 is detachably connected to the middle counterweight 12. When the floating counterweight 13 and the middle counterweight 12 are detached, the floating airbag 2 can lift the floating counterweight 13 away from the main counterweight and the middle counterweight 12. The floating counterweight 13 and the middle counterweight 12 can also be connected, in which case the floating airbag 2 can simultaneously lift the floating counterweight 13 and the middle counterweight 12 away from the main counterweight.

[0050] like Figure 3As shown, in one embodiment of the present application, when the floating airbag 2 has a first floating height and the floating heavy hammer 13 and the intermediate heavy hammer 12 are in a connected state, the floating airbag 2 lifts the intermediate heavy hammer 12 and the floating heavy hammer 13, the intermediate heavy hammer 12 and the floating heavy hammer 13 are far away from the main heavy hammer. At this time, the vibrating heavy hammer is the first heavy hammer combination formed by the main heavy hammer, the mass of the first heavy hammer combination is the mass M1 of the main heavy hammer, the acceleration is a1=F / M1, where F is the vibration force, the natural frequency of the vibrator is ω1, the amplitude of the heavy hammer is X1, the linear sweep start frequency can be 6Hz or 8Hz, the vibroseis frequency-divided vibrator 100 is in a first excitation mode, the first excitation mode is a high-frequency mode, the frequency range of the first excitation mode is: rated energy output between 6-120Hz or 8-120Hz, and the high frequency response reaches 160Hz. The load characteristic of the heavy hammer is matched according to the mass M1 and the linear sweep start frequency of 6Hz or 8Hz.

[0051] As Figure 4 As shown, in another embodiment of the present application, when the floating airbag 2 has a first floating height, the floating heavy hammer 13 and the intermediate heavy hammer 12 are in a detached state, the intermediate heavy hammer 12 is pressed against the main heavy hammer, and the floating heavy hammer 13 is far away from the main heavy hammer, the heavy hammer that can vibrate at this time is the second heavy hammer combination formed by the combination of the main heavy hammer 11 and the intermediate heavy hammer 12. The mass of the second heavy hammer combination is the sum of the mass of the main heavy hammer and the mass of the intermediate heavy hammer 12, that is, M1+M2, the acceleration is a2=F / (M1+M2), where F is the vibration force, the natural frequency of the vibrator is ω2 (ω2<ω1), the amplitude of the heavy hammer is X2, the linear sweep start frequency can be 3Hz, the vibroseis frequency-divided vibrator 100 is in a second excitation mode, the second excitation mode is a wide-frequency mode, the frequency range of the second excitation mode is: the rated energy output can be 3-120Hz, and the high frequency can respond up to 160Hz. The load characteristic of the heavy hammer is matched according to the mass M1+M2 and the linear sweep start frequency of 3Hz. Since a2<a1, at the same vibration frequency, X2<X1, the output energy of the second excitation mode is less than that of the first excitation mode. The second excitation mode obtains a relatively low-frequency signal, and the low-frequency signal has strong penetrability when propagating underground.

[0052] As Figure 6As shown, in yet another embodiment of the present application, when the floating airbag 2 has a second floating height, and both the floating heavy hammer 13 and the intermediate heavy hammer 12 are pressed against the main heavy hammer, the heavy hammers that can vibrate in the heavy hammer assembly 1 at this time are a third heavy hammer combination formed by the main heavy hammer, the intermediate heavy hammer 12 and the floating heavy hammer 13 in combination. The mass of the third heavy hammer combination is the sum of the mass of the main heavy hammer, the mass of the intermediate heavy hammer 12 and the mass of the floating heavy hammer 13, that is, M1+M2+M3, the acceleration is a3=F / (M1+M2+M3), where F is the vibration force, the natural frequency of the vibrator is ω3 (ω3<ω2<ω1), the amplitude of the heavy hammer is X3, the linear sweep start frequency can be 1.0Hz or 1.5Hz, the controllable seismic source frequency-divided vibrator 100 is in a third excitation mode, the third excitation mode is a low-frequency mode, the frequency range of the third excitation mode: the rated energy output can be between 1.0-120Hz or 1.5-120Hz, and the high frequency can respond up to 160Hz. The load characteristic of the heavy hammer is matched according to the mass M1+M2+M3 and the linear sweep start frequency of 1.0Hz or 1.5Hz. Since a3<a2<a1, at the same vibration frequency, X3<X2<X1, and the output energy of the third excitation mode is the minimum. The third excitation mode obtains the lowest low-frequency signal, and the low-frequency signal has strong penetrability when propagating underground.

[0053] For the above three excitation modes, the maximum load characteristic is selected to match the drive characteristic, so as to ensure that the time-sharing excitation of the three modes works normally.

[0054] In this embodiment, the first floating height is greater than the second floating height, and the first floating height and the second floating height of the floating airbag 2 can be set as required according to the size of the floating heavy hammer 13, the size of the intermediate heavy hammer 12, and the sizes of other structures, which are not limited herein.

[0055] In this embodiment, the mass of the heavy hammer is related to factors such as production process and accumulated practical experience. When the peak output force of the seismic source is 60000lb, the mass of the main heavy hammer can be 4100kg, the mass of the intermediate heavy hammer 12 can be 900kg, the mass of the floating heavy hammer 13 can be 1100kg, the mass of the first heavy hammer combination can be 4100kg, the mass of the second heavy hammer combination can be 5000kg, and the mass of the third heavy hammer combination can be 6100kg. When the peak output force of the seismic source is 80000lb, the mass of the main heavy hammer can be 5300kg, the mass of the intermediate heavy hammer 12 can be 1200kg, the mass of the floating heavy hammer 13 can be 1400kg, the mass of the first heavy hammer combination can be 5300kg, the mass of the second heavy hammer combination can be 6500kg, and the mass of the third heavy hammer combination can be 7900kg. Certainly, the masses of the main heavy hammer, the intermediate heavy hammer and the floating heavy hammer in the heavy hammer assembly can also be other values, as long as they are suitable for production and application.

[0056] In this embodiment, the intermediate counterweight 12 can be a single unit, or it can include two or more parts. The shape of the intermediate counterweight 12 is not limited; it can be a plate-like structure, a block-like structure, an L-shaped structure, or an irregular structure. The floating counterweight 13 can be a single unit, or it can include two or more parts; the shape of the floating counterweight 13 is also not limited; it can be a plate-like structure, a block-like structure, an L-shaped structure, or an irregular structure, as long as it allows for separation and combination between the main counterweight 11, the intermediate counterweight 12, and the floating counterweight. The floating counterweight and the intermediate counterweight can be located on one side of the first surface of the main counterweight, or on one side of the second surface of the main counterweight 11, or inside or outside the support structure 3. The floating airbag can be located at other positions on the support structure 3, as long as it allows for the combination and separation of the intermediate counterweight 12 and the floating counterweight 13.

[0057] Therefore, the controllable source frequency divider vibrator 100 provided in this application, by splitting or combining the weight assembly 1, including the main weight, the intermediate weight 12, and the floating weight 13, to form a first weight assembly, a second weight assembly, and a third weight assembly, can divide the controllable source scanning signal of 1.0-120Hz or 1.5-120Hz into three excitation modes according to the rated energy output: a first excitation mode (6-120Hz or 8-120Hz, focusing on high-frequency and mid-frequency energy excitation), a second excitation mode (3-120Hz, focusing on broadband energy excitation), and a third excitation mode (1.0-120Hz or 1.5-120Hz, focusing on low-frequency energy excitation), thus enhancing the excitation energy through frequency division. The high-frequency response of the three excitation modes can reach 160Hz, and a lower driving amplitude is selected for shallower application scenarios. The three excitation modes respectively use three different weight combinations to generate vibration to achieve scanning excitation. The first hammer combination can generate a higher frequency band of rated energy output linear scan, such as 6-120Hz or 8-120Hz. The third hammer combination can generate a lower frequency band of rated energy output linear scan, such as 1.0-120Hz or 1.5-120Hz. Superimposing the frequency-divided acquisition signals from both combinations yields a better signal-to-noise ratio bandwidth, suitable for challenging oil and gas exploration in deep, ultra-deep, and thin interbedded layers. The second hammer combination can generate a wider frequency band of rated energy output linear scan, such as 3-120Hz, allowing the controllable source frequency-divided vibrator 100 to effectively balance low-frequency and high-frequency excitation. This controllable source frequency-divided vibrator 100 with at least three excitation modes can enhance excitation energy in different frequency bands, improve the low-frequency and high-frequency performance of seismic acquisition data, achieve a better signal-to-noise ratio bandwidth, and enhance the adaptability of the controllable source to complex environments, thereby increasing equipment utilization. It is suitable for oil and gas exploration in various environments.

[0058] Furthermore, the controllable source frequency divider vibrator 100 provided in this application can enhance the excitation energy by synchronously exciting multiple controllable source frequency divider vibrators 100. Moreover, the phase control accuracy (synchronization accuracy) and excitation energy of the first hammer combination are better than those of the third hammer combination. Thus, the synchronous excitation of multiple controllable source frequency divider vibrators 100 can obtain deeper levels of medium and high frequency seismic acquisition data.

[0059] In this embodiment, the counterweight assembly 1 may also include multiple other counterweights, that is, the counterweight assembly 1 may include two counterweights, three counterweights, four counterweights, or other numbers of counterweights. The setting position and mass of different counterweights are set according to the requirements and structure, as long as they are suitable for production and application.

[0060] like Figure 3 , Figure 4 and Figure 6 As shown in this embodiment, the main weight 11 has a first surface 111 and two second surfaces 112 adjacent to the first surface 111; there are two intermediate weights 12, which are symmetrically arranged at both ends of the first surface 111 along a first direction; the intermediate weights 12 include a first part 121, which has a third surface facing the main weight 11 and a fourth surface facing the floating weight 13. The third and fourth surfaces are both surfaces parallel to the first surface 111 of the main weight 11. The first part 121 is used to be placed on the first surface 111 of the main weight 11 and is detachably connected to the first surface 111 of the main weight 11. The intermediate counterweight 12 includes a first part 121 and a second part 122. The thickness of the first part is greater than the thickness of the second part. The first part 121 and the second part 122 are connected to form an L-shaped structure. The first part 121 has a third surface facing the main counterweight 11 and a fourth surface facing the floating counterweight. Both the third and fourth surfaces are parallel to the first surface of the main counterweight 11. The first part 121 is used to be placed on the first surface of the main counterweight 11 and is detachably connected to the first surface of the main counterweight 11. The second part 122 is used to be detachably connected to the second surface 112. The first direction is the direction of the line connecting the center points of the two second surfaces.

[0061] In this embodiment, the main counterweight 11 can be a rectangular prism structure with a rectangular base, or it can be any other shape. The choice is as long as it is suitable for production and application, and can be separated from or combined with the intermediate counterweight 12 and the floating counterweight 13.

[0062] In one embodiment of this application, the intermediate counterweight 12 may consist only of a first part 121. The first part 121 is disposed on the first surface of the main counterweight 11, and the two surfaces of the first part 121 in the thickness direction, the third surface and the fourth surface, are both planes parallel to the first surface. This allows the intermediate counterweight 12 to be better disposed on the main counterweight 11. When the intermediate counterweight 12 is connected to the main counterweight 11, impurities can be prevented from entering between the main counterweight 11 and the intermediate counterweight 12 during vibration, thus avoiding a reduction in vibration effect. This allows the intermediate counterweight 12 to vibrate together with the main counterweight 11, preventing the intermediate counterweight 12 from shaking during vibration, thereby ensuring the vibration effect.

[0063] like Figure 9 As shown in one embodiment of this application, the intermediate counterweight 12 may further include a first part 121 and a second part 122. The first part 121 and the second part 122 form an L-shaped structure and are respectively disposed at the L-shaped connection area formed by the first and second surfaces of the main counterweight. The first part 121 of the intermediate counterweight 12 can be detachably connected to the first surface 111 of the main counterweight by bolts, and the second part 122 of the intermediate counterweight 12 can be detachably connected to the second surface 112 of the main counterweight by bolts. Thus, the intermediate counterweight 12 does not occupy too much space and is easy to connect with the main counterweight. Furthermore, the mass of the first part 121 is greater than the mass of the second part 122, and the thickness of the first part 121 is greater than the thickness of the second part 122. This avoids the second part being too thick, which would cause the width of the counterweight assembly in the first direction to be too large, thus avoiding the limitation imposed by the vehicle body due to the width in the first direction and improving stability and vibration performance.

[0064] like Figure 10 and Figure 11 As shown in the embodiment of this application, the floating weight 13 includes two third parts 131 and two fourth parts 132. Each third part 131 is detachably connected to the two fourth parts 132 on both sides along the first direction. Each third part 131 is symmetrically arranged along the first direction. The two third parts 131 and the two fourth parts 132 are connected in sequence to form a ring structure. The side of the third part 131 near the main weight 11 has a protrusion of a preset height relative to the side of the fourth part 132 near the middle weight 12. The third part 131 is arranged corresponding to at least part of the main weight 11 and is used for detachable connection with the main weight 11. The fourth part 132 is arranged corresponding to at least part of the first part 121 and is used for detachable connection with the first part 121. The third part 131 has a fifth surface facing the main weight 11, and the fourth part 132 has a sixth surface facing the middle weight 12. The fifth surface and the sixth surface are both planes arranged parallel to the first surface 111.

[0065] like Figure 10 and Figure 11 As shown, in this embodiment, the floating weight 13 includes two third parts 131 and two fourth parts 132, so that the floating weight 13 is located above the intermediate weight 12 and the main weight 11. The two third parts 131 and the two fourth parts 132 are connected to form a ring structure. The ring structure has a rectangular opening 133 at its center. The rectangular opening 133 can avoid interference with the first limiting block and the cylinder sealing cover of the main weight 11. Each third part 131 is detachably connected to two fourth parts 132 by bolts on both sides along the first direction. Each fourth part 132 is detachably connected to two third parts 131 by bolts on both ends along the second direction. The two third parts 131 are symmetrically arranged along the first direction, and the two fourth parts 132 are symmetrically arranged along the second direction. Each fourth part 132 corresponds to at least a portion of the first part 121 of the intermediate weight 12, and each third part 131 corresponds to at least a portion of the main weight 11. Thus, the third parts 131 are positioned above the main weight 11, and the fourth parts 132 are positioned above the intermediate weight 12. Since the intermediate weight 12 is positioned on the main weight 11, the side of the third part 131 facing the main weight 11 is opposite to it. The fourth part 132 has a protrusion of a preset height on the side facing the intermediate weight 12. The preset height can be the height of the intermediate weight 12. This allows the floating weight 13 to be placed on the main weight 11 and the intermediate weight 12 without any gap between it and the main weight 11 and the intermediate weight 12. The separately set floating weight 13 can avoid unevenness when pressed against the main weight 11 or the intermediate weight 12. This can prevent impurities from entering between the main weight 11, the intermediate weight 12 and the floating weight 13 during vibration, thus avoiding a reduction in vibration effect. The floating weight 13 and the intermediate weight 12 can vibrate together with the main weight 11, preventing the floating weight 13 or the intermediate weight 12 from shaking during vibration, thereby ensuring vibration effect and providing stability.

[0066] In this embodiment, during the installation of the floating weight 13, the third part 131 can be connected to the corresponding main weight 11 first, and the fourth part 132 can be connected to the corresponding first part 121. That is, the third part 131 is attached to the main weight 11, and the fourth part 132 is attached to the first part 121. Then, the third part 131 and the fourth part 132 are bolted together. This ensures that the floating weight 13 is reliably connected to the intermediate weight 12 and the main weight 11, and avoids the problem of gaps at the joint surface affecting the tightness.

[0067] In this embodiment, the shape of the third part 131 can be set according to the needs of production and application, and is not limited here. Both the third part 131 and the fourth part 132 can be provided with rubber blocks at the corners to avoid noise caused by collisions with other structures during vibration.

[0068] In this embodiment, when the mass of the floating weight 13 is insufficient, a protrusion can be provided on the seventh surface of the fourth part 132 that is opposite to the sixth surface to increase the mass of the floating weight 13 and ensure the vibration requirements are met.

[0069] In this embodiment, when the main weight 11, intermediate weight 12, and floating weight 13 need to be combined, a bolt connection can be achieved by sequentially passing a screw through the fourth part 132 of the floating weight 13, the first part 121 of the intermediate weight 12, and the first surface 111 of the main weight. The third part 131 of the floating weight 13 is also bolted to the main weight 11 to achieve the third excitation mode. When the main weight 11 and intermediate weight 12 need to be combined, the floating weight 13 can be... The floating airbag 2 lifts the weights, separating them from the main weight 11 and the intermediate weight 12. The first surface 111 of the main weight 11 is connected to the first part 121 of the intermediate weight 12 by bolts to achieve the second excitation mode. When the main weight 11 needs to be set separately, the first part 121 of the intermediate weight 12 is bolted to the fourth part 132 of the floating weight 13. Then the intermediate weight 12 and the floating weight 13 can be lifted by the floating airbag 2 to achieve the first excitation mode.

[0070] like Figures 6 to 8 As shown in the embodiment of this application, the first surface 111 of the main weight 11, the first part 121 of the intermediate weight 12, and the fourth part 132 of the floating weight 13 are detachably connected by the first connector 4.

[0071] The first connecting member 4 includes a first rod-shaped structure 41, a second rod-shaped structure 42, a third rod-shaped structure 44 and a fourth rod-shaped structure 47 arranged sequentially along the length direction. At least the first rod-shaped structure 41 and the fourth rod-shaped structure 47 have external threads. The third rod-shaped structure 44 has a tightening portion 441, which is located between the first end and the second end of the third rod-shaped structure 44 and is disposed close to the second rod-shaped structure 42, so as to tighten the first rod-shaped structure to the main counterweight through the tightening portion 441.

[0072] In this embodiment, the first connecting member 4 includes a first rod-shaped structure 41, a second rod-shaped structure 42, a flat square 43, a third rod-shaped structure 44, a washer 45, a first nut 46, and a fourth rod-shaped structure 47. The first rod-shaped structure 41, the second rod-shaped structure 42, the third rod-shaped structure 44, and the fourth rod-shaped structure 47 are integrally formed. The diameters of the first rod-shaped structure 41, the second rod-shaped structure 42, and the fourth rod-shaped structure 47 are all smaller than the diameter of the third rod-shaped structure 44. Both the first rod-shaped structure 41 and the fourth rod-shaped structure 47 have external threads. The main counterweight 11 has a first threaded hole perpendicular to the first surface 111. The intermediate counterweight 12 has a first connecting hole penetrating the first portion 121 along its thickness direction. The first connecting member's first... The rod-shaped structure 41 and the second rod-shaped structure 42 pass through the first connecting hole so that the first rod-shaped structure 41 is threadedly connected to the first threaded hole; the length of the third rod-shaped structure 44 is equal to the thickness of the fourth part 132. The third rod-shaped structure 44 is a smooth rod-shaped structure. The third rod-shaped structure 44 has a tightening part 441, which is located between the first end and the second end of the third rod-shaped structure 44 and is set close to the second rod-shaped structure 42. The tightening part 441 on the third rod-shaped structure 44 can be a hexagonal structure adapted to an open-end wrench, so as to facilitate the tightening of the first rod-shaped structure 41 to the first threaded hole of the main weight by using an open-end wrench, avoiding the problem of not being able to tighten when tightening at the flat side because the distance from the first rod-shaped structure is too far.

[0073] In this embodiment, the fourth rod-shaped structure 47 is connected to the third rod-shaped structure 44 via a flat square 43. A washer 45 is fitted over the flat square 43, and the washer 45 can be an external hexagonal washer 45. The first nut 46 is threadedly connected to the fourth rod-shaped structure 47, and the first nut 46 is pressed onto the external hexagonal washer 45. The upper surface of the flat square 43 is lower than the upper surface of the external hexagonal washer 45. The floating weight 13 has a second connecting hole that penetrates the floating weight 13 along its thickness direction. The second connecting hole communicates with the first connecting hole, and the diameter of the second connecting hole is larger than that of the first connecting hole. The second connecting hole is adapted to the third rod-shaped structure 44 and is used to accommodate the third rod-shaped structure 44.

[0074] In this embodiment, in addition to the first connector, the connection between the main weight 11 and the intermediate weight 12 may also include an L-shaped connection structure. The L-shaped connection structure is disposed on one side of the second surface 112 of the main weight 11 and is used to connect the second surface 112 of the main weight 11 with the first part 121 or the second part 122 of the intermediate weight 12, thereby further fixing the main weight 11 and the intermediate weight 12.

[0075] In this embodiment, when the controllable source frequency divider vibrator 100 is in the third excitation mode, it is necessary to connect the main weight 11, the intermediate weight 12, and the floating weight 13. At this time, the floating weight 13 and the intermediate weight 12 are first lowered together through the floating airbag 2 to press onto the main weight 11. The second connecting hole, the first connecting hole, and the first threaded hole are aligned. Then, the first connecting piece is inserted through the second connecting hole into the first connecting hole and the first threaded hole, and is threadedly connected to the main weight 11 and the intermediate weight 12. The inner groove of the gasket 45 is then... The fastening sleeve is fitted inside the flat square of the bolt head of the fourth rod-shaped structure 47, and then fitted onto the outer hexagon of the washer 45. The first connecting piece can be quickly tightened using a quick-release wrench (manual, electric, or pneumatic). Then, the washer 45 is removed, and the floating weight 13 is raised to a suitable height using the floating airbag 2 (without detaching from the first connecting piece). An open-end wrench is inserted into the hexagon of the third rod-shaped structure 44 to apply force to the first rod-shaped structure 41, pressing the intermediate weight 12 against the main weight 11 to prevent the intermediate weight 12 from shaking during vibration. Then, the floating weight 13 is lowered using the floating airbag 2 to press onto the intermediate weight 12. The inner groove of the washer 45 is fitted into the flat square of the bolt head of the fourth rod-shaped structure 47, and the first nut 46 is screwed in. The nut is quickly tightened using a quick-release wrench (manual, electric, or pneumatic), and the nut is secured with additional force using the wrench. The function of the first connector is to complete the one-to-one clamping relationship between the intermediate counterweight 12 and the main counterweight 11, and between the floating counterweight 13 and the intermediate counterweight 12 within a single hole, so as to avoid the intermediate interlayer not being tightly clamped due to factors such as excessively thick fastening layer, excessively long bolts, and mutual interference between structures, which would affect the vibration effect.

[0076] In this embodiment, the disassembly process of the main weight 11, the intermediate weight 12, and the floating weight 13 includes: unscrewing the first nut with a wrench, removing the washer 45, raising the floating weight 13 to a suitable height (without detaching from the first connector) using the floating airbag 2, inserting an open-end wrench into the hexagon of the third rod-shaped structure 44 to loosen the first rod-shaped structure 41, then lowering the floating weight 13 onto the intermediate weight 12 using the floating airbag 2, fitting the inner groove of the washer 45 into the flat square of the bolt head of the fourth rod-shaped structure 47, fitting the fastening sleeve onto the outer hexagon of the washer 45, and quickly loosening and removing the first connector using a quick wrench (manual, electric, or pneumatic), and then raising the floating weight 13 and the intermediate weight 12 using the floating airbag 2.

[0077] like Figure 4 and Figure 5As shown in the embodiment of this application, the first face of the main weight and the first part of the intermediate weight are detachably connected by a second connector; the second connector includes an external hexagonal head screw; the main weight has a first threaded hole perpendicular to the first face; the intermediate weight has a first connecting hole penetrating the first part along the thickness direction of the first part, the external hexagonal head screw passes through the first connecting hole and is threadedly connected to the first threaded hole, the first connecting hole includes an inner countersunk hole near the fourth face, the diameter of the inner countersunk hole is adapted to the fastening sleeve of the external hexagonal head screw.

[0078] In this embodiment, when the controllable source frequency divider vibrator 100 is in the second excitation mode, it is necessary to connect the intermediate weight 12 to the main weight 11. At this time, the intermediate weight 12 can be lowered by the floating airbag 2, so that the intermediate weight 12 presses down on the main weight 11. The second connecting piece is inserted through the second connecting hole into the first connecting hole and the first threaded hole. Then, a fastening sleeve is inserted from the side, and the long extension of the sleeve wrench is inserted through the second connecting hole into the fastening sleeve. The second connecting piece is tightened by a quick wrench (manual, electric, or pneumatic), and then the wrench is used to tighten it further from the side. This ensures that the second connecting piece does not protrude from the surface of the intermediate weight, avoiding interference with other structures during vibration and improving the vibration effect.

[0079] like Figure 1 , Figure 2 , Figure 4 and Figure 13 As shown, in this embodiment of the application, it further includes: a first limiting block 6, which is disposed between the base plate 31 and the main weight; and / or the first limiting block 6 is disposed on the side of the main weight 11 facing the floating weight 13; and a second limiting block 7, which is disposed on the support beam 33, has a preset height, and is disposed adjacent to the floating airbag 2, for limiting the minimum height of the floating weight 13.

[0080] In this embodiment, the controllable source frequency divider vibrator 100 further includes multiple first limiting blocks 6 and multiple second limiting blocks 7. The first limiting blocks 6 can be disposed on the main weight 11, and the first limiting blocks 6 are located between the base plate 31 and the main weight 11; thereby preventing the weight assembly 1 from rigidly impacting the base plate 31 when it moves to the lower dead center. The setting of the first limiting blocks 6 can limit the stroke of the weight assembly 1, improving safety. The first limiting blocks 6 can also be disposed on the plane of the fifth surface of the main weight 11 facing the floating weight 13, and corresponding to the position of the rectangular opening 133 of the floating weight 13, thereby preventing the main weight 11 from rigidly impacting the top plate 34 when it moves to the upper dead center.

[0081] In this embodiment, the second limiting block 7 is disposed on the support beam 33, adjacent to the floating airbag 2. The second limiting block is located between the support beam 33 and the floating weight 13. The setting of the second limiting block 7 can limit the minimum height of the floating weight 13, thereby ensuring that the main weight 11 and the intermediate weight 12 do not collide with the floating weight 13 when they move to the upper stop point. Furthermore, it can prevent the floating weight 13 from falling and colliding with the main weight and the intermediate weight below after the floating airbag 2 is damaged.

[0082] In this embodiment, there can be multiple first limiting blocks 6, and the number can be set according to requirements; there can be multiple second limiting blocks 7, such as four, six, or other numbers, which can be set according to requirements.

[0083] like Figure 12 As shown in the embodiment of this application, the first limiting block 6 is fitted with a first metal sleeve 61, and the axial height of the first metal sleeve 61 is equal to the lowest compression height of the first limiting block 6; the second limiting block 7 is fitted with a second metal sleeve, and the axial height of the second metal sleeve is equal to the lowest compression height of the second limiting block 7.

[0084] In this embodiment, the minimum compression height of the first limiting block 6 is the lowest height under which the first limiting block 6 is compressed without damage. The first limiting block 6 can be a rubber structure with elasticity. Its height in its natural state can be about 100mm. When the first limiting block 6 is compressed, it can be compressed elastically by a maximum of tens of millimeters. For example, if the height of the first limiting block 6 is 100mm, it can be compressed up to 85mm without causing damage. Therefore, a metal sleeve with an axial height of 85mm can be fitted over the first limiting block 6 to prevent the compression of the first limiting block 6 from exceeding the minimum compression height and to prevent damage to the first limiting block 6.

[0085] In this embodiment, the minimum compression height of the second limiting block 7 is the lowest height under which the second limiting block 7 is compressed without damage. The second limiting block 7 can be a rubber structure with elasticity. Its height in its natural state can be about 100mm. When the second limiting block 7 is compressed, it can be elastically compressed to a maximum of tens of millimeters. For example, if the height of the second limiting block 7 is 80mm, it can be compressed to a maximum of 70mm without causing damage to the second limiting block 7. Therefore, a second metal sleeve with an axial height of 70mm can be fitted over the second limiting block 7 to prevent the compression of the second limiting block 7 from exceeding the minimum compression height and to prevent damage to the second limiting block 7.

[0086] In this embodiment, both the first metal sleeve 61 and the second metal sleeve can be steel rings.

[0087] like Figure 3 , Figure 4 and Figure 6 As shown in the embodiment of this application, the floating airbag 2 includes a floating airbag 2, which has a floating pressure regulating valve and a first inflation / deflation valve. The floating pressure regulating valve is used to regulate the pressure inside the floating airbag 2 to regulate the supporting force of the floating airbag 2; the first inflation / deflation valve is used to inflate and deflate the airbag to adjust the height of the floating airbag 2.

[0088] In this embodiment, the floating airbag 2 includes multiple floating airbags. The floating airbag 2 has a floating pressure regulating valve and a first deflation valve. The floating pressure regulating valve is used to inflate the floating airbag 2, and the first deflation valve is used to deflate it.

[0089] In this embodiment, the pressure of the floating airbag 2 can be increased by inflating it through the floating pressure regulating valve, thereby improving the supporting force. The pressure of the floating airbag 2 can be reduced by venting the gas in the floating airbag 2 through the first deflation valve.

[0090] In this embodiment, by setting the floating airbag 2, in the first excitation mode, the floating airbag 2 can have a first supporting force to support the weight of the floating weight 13 and the intermediate weight 12 at the first floating height; in the second excitation mode, the floating airbag 2 can have a second supporting force to support the weight of the floating weight 13 at the first floating height; in the third excitation mode, the floating airbag 2 can have a balancing force to balance the weight of the floating weight 13 and the intermediate weight 12 at the second floating height, so that the inertial force generated by the weight assembly 1 during the up-and-down vibration process is relatively balanced.

[0091] In this embodiment, the floating airbag 2 simplifies the process by eliminating the need for safety plan applications and approvals required for using lifting equipment when moving the relatively heavy intermediate weight 12 and floating weight 13. The space around the controllable source frequency divider vibrator 100 is limited, and removing the intermediate weight 12 and floating weight 13 using lifting equipment requires dismantling surrounding interfering components (such as lifting cylinders), making reinstallation even more difficult. Frequent disassembly and reassembly can easily damage related components, making it impractical. Furthermore, the exploration area has a complex surface environment, often lacking roads, requiring vehicles with good off-road capabilities, which ordinary lifting vehicles cannot easily access. The removed intermediate weight 12 and floating weight 13 also need to be reinstalled and secured in suitable positions on the controllable source vehicle; otherwise, the weight distribution on the controllable source vibration plate will change, causing poor coupling between the plate and the ground and affecting the vibration signal. The removed weights also increase management costs and even pose a risk of loss. The floating airbag system provided in this application allows for single-person operation to raise or lower the floating weight 13 and the intermediate weight 12, making it simple, safe, and economical to operate, and easy to promote on a large scale. Furthermore, the disassembly and movement of the floating weight 13 and the intermediate weight 12 will not interfere with or damage other structures, making operation even more convenient. The floating airbag system can also effectively isolate vibration energy, preventing structural interference and vibration signal interference, ensuring reliable force distribution at the support points.

[0092] like Figure 3 , Figure 4 and Figure 6 As shown in the embodiment of this application, it also includes a plurality of balance airbags 8, which are disposed between the base plate 31 and the main weight. Each balance airbag 8 has a balance pressure regulating valve and a second deflation valve. The balance pressure regulating valve is used to inflate the balance airbag 8, and the second deflation valve is used to deflate it.

[0093] In this embodiment, the arrangement of multiple balancing airbags 8 can balance the weight of the weight combination, making the inertial force generated by the up-and-down movement of the weight combination relatively balanced, avoiding the need to consume more energy to overcome gravity, and improving energy utilization.

[0094] In this embodiment, a vibration isolation airbag is also provided on the base plate 31, and the vibration isolation airbag does not interfere with the counterweight assembly 1. The vibration isolation airbag is used to support the load, except for... Figure 1 ,or Figure 2 ,or Figure 3 ,or Figure 4 ,or Figure 6 The weight applied to the base plate 31, in addition to the body weight, can also isolate vibrations and prevent them from being transmitted to the vehicle body.

[0095] like Figure 3As shown, in one embodiment of this application, the first part 121 of the intermediate weight 12 and the fourth part 132 of the floating weight 13 are bolted together. Four floating airbags and four second limiting blocks are provided on the support beam 33. The floating weight 13 and the intermediate weight 12 are moved away from the main weight by the lifting of the four floating airbags. The floating airbags have a first supporting force to support the intermediate weight 12 and the floating weight 13 at a first floating height. The floating weight 13 can be raised so that it is approximately 10mm away from the top plate 34, just touching it. The four floating airbags provide elastic support for the floating weight 13 and the intermediate weight 12. The four second limiting blocks... Block 7 is used to support the floating weight 13 and the intermediate weight 12 after the floating airbag leaks air, preventing the structure supported by the floating airbag from falling and colliding with the main weight below. At this time, the weight assembly 1 can vibrate the first weight combination formed by the main weight. The mass of the first weight combination is the mass of the main weight, i.e., M1. The acceleration is a1 = F / M1, where F is the vibration force. The vibrator's natural frequency is ω1, the linear scan starting frequency is 6Hz or 8Hz, and the controllable source frequency divider vibrator 100 is in the first excitation mode. The first excitation mode is a high-frequency mode with a frequency range of 6-120Hz or 8-120Hz, and a high-frequency response up to 160Hz. When the main weight is at the middle position of the upper and lower dead center movement stroke, the supporting force of the balancing airbag is equal to the weight of the main weight. Thus, the balancing airbag can balance the weight of the main weight, making the inertial force generated by the up and down movement of the first weight combination relatively balanced.

[0096] In this embodiment, the step of changing from the first activation mode to the second activation mode includes: deflating the balance airbag so that the main weight 11 is at the lower dead center position; removing the second limiting block; deflating the floating airbag so that the intermediate weight 12 contacts the main weight; disassembling the connecting bolts connecting the floating weight and the intermediate weight; inflating the floating weight 13 to the first floating height; the floating airbag having a second supporting force to support the floating weight 13 at the first floating height to lift the floating weight 13; installing the second limiting block; then fastening the first surface 111 of the main weight and the first part 121 of the intermediate weight 12 with bolts; and fastening the second surface 112 of the main weight and the second part 122 of the intermediate weight 12 with bolts; and adjusting the pressure of the balance airbag to a specified value so that the supporting force of the balance airbag is equal to the weight of the main weight and the intermediate weight 12.

[0097] like Figure 4As shown, in another embodiment of this application, the intermediate weights 12 are all pressed onto the main weights 11. The first part 121 of the intermediate weights 12 and the first surface 111 of the main weights are bolted together, and the second part 122 of the intermediate weights 12 and the second surface 112 of the main weights are bolted together. Four floating airbags 2 and four second limiting blocks are provided on the support beam 33. Each of the four floating airbags 2 has a first floating height and a second supporting force, supporting the floating weights 13 at the first floating height. This allows the floating weights 13 to be raised to a distance of approximately 10mm from the top plate 34, just touching it. The supporting force of the floating airbags is equal to the weight of the floating weights 13, thereby separating the floating weights 13 from the intermediate weights 12. Four floating airbags elastically support the floating weight 13. Four second limiting blocks are used to support the floating weight 13 after the floating airbags leak air, so as to prevent the structure supported by the floating airbags from falling and colliding with the main weight and the middle weight below. At this time, the weight assembly 1 can vibrate the second weight combination formed by the combination of the main weight and the middle weight 12. The mass of the second weight combination is the sum of the mass of the main weight and the mass of the middle weight 12, i.e., M1+M2. The acceleration is a2=F / (M1+M2), where F is the vibration force, the vibrator's natural frequency is ω2, the linear scanning start frequency is 3Hz, and the controllable source frequency divider vibrator 100 is in the second excitation mode. The second excitation mode is a wideband mode with a frequency range between 3-120Hz and a high frequency response up to 160Hz. When the main weight is in the middle of its upper and lower dead center stroke, the supporting force of the balancing airbag is equal to the weight of the main weight and the middle weight 12. Thus, the balancing airbag can balance the weight of the main weight and the middle weight 12, making the inertial force generated by the up and down movement of the second weight combination relatively balanced.

[0098] In this embodiment, the step of changing from the second activation mode to the first activation mode includes: deflating the balance airbag so that the main weight 11 is at the lower dead center position; then disassembling the multiple bolts connecting the main weight and the intermediate weight 12; removing the second limiting block; deflating the floating airbag so that the floating weight 13 contacts the intermediate weight; installing the connecting bolts connecting the floating weight and the intermediate weight; inflating the floating airbag to the first floating height so that the floating airbag lifts the intermediate weight 12 and the floating weight 13; the floating airbag having a first supporting force to support the intermediate weight 12 and the floating weight 13 at the first floating height; installing the second limiting block; and adjusting the pressure of the balance airbag to a specified value so that the supporting force of the balance airbag is equal to the weight of the main weight.

[0099] In this embodiment, the step of changing from the second excitation mode to the third excitation mode includes: deflating the balancing airbag so that the main weight 11 is at the lower dead center position; then removing multiple bolts connecting the main weight 11 and the intermediate weight 12; removing the second limiting block; deflating the floating airbag so that the floating weight 13 descends to contact the main weight and the intermediate weight 12; then bolting the first surface 111 of the main weight, the first part 121 of the intermediate weight 12, and the fourth part 132 of the floating weight 13 together; bolting the second surface 112 of the main weight and the second part 122 of the intermediate weight 12 together; installing the connecting bolts connecting the floating weight and the intermediate weight; adjusting the pressure of the balancing airbag and the floating airbag to a specified value so that the supporting force of the balancing airbag is equal to the weight of the main weight; and the balancing force of the floating airbag can balance the intermediate weight 12 and the floating weight 13 at the second floating height.

[0100] like Figure 6 As shown, in another embodiment of this application, the floating airbag 2 has a second floating height, and the floating weight 13 and the intermediate weight 12 are both pressed onto the main weight. The fourth part 132 of the floating weight 13, the first part 121 of the intermediate weight 12, and the first surface 111 of the main weight are bolted together. The second part 122 of the intermediate weight 12 and the second surface 112 of the main weight are also bolted together, thereby securing the floating weight 13 and the intermediate weight 12 to the main weight. At this time, the weights that can vibrate in the weight assembly 1 are the main weight, the intermediate weight 12, and the floating weight. The third hammer assembly, formed by the combination of 13, has a mass equal to the sum of the mass of the main hammer, the mass of the intermediate hammer 12, and the mass of the floating hammer 13, i.e., M1 + M2 + M3. The acceleration is a3 = F / (M1 + M2 + M3), where F is the vibration force, the vibrator's natural frequency is ω3, the linear scan starting frequency is 1.0 Hz or 1.5 Hz, and the controllable source frequency divider vibrator 100 is in the third excitation mode. The third excitation mode is a low-frequency mode with a frequency range of 1.0-120 Hz or 1.5-120 Hz, and a high-frequency response up to 160 Hz. When the main weight is in the middle of its upper and lower dead center stroke, the supporting force of the balancing airbag is equal to the weight of the main weight, and the supporting force of the floating airbag is equal to the weight of the middle weight 12 and the floating weight 13. Thus, the balancing airbag can balance the weight of the main weight, and the floating airbag can balance the weight of the middle weight 12 and the floating weight 13 at the second floating height, so that the inertial force generated by the up and down movement of the third weight combination is relatively balanced.

[0101] In this embodiment, the step of changing from the third activation mode to the second activation mode includes: deflating the balance airbag and the floating airbag 2 so that the main weight 11 is at the lower dead point position; then disassembling multiple bolts connecting the main weight 11, the intermediate weight 12, and the floating weight 13; disassembling the connecting bolts connecting the floating weight and the intermediate weight; inflating the floating airbag to the first floating height to lift the floating weight 13 to the top; installing the second limiting block; then bolting the main weight and the intermediate weight 12 together; adjusting the pressure of the balance airbag and the floating airbag to a specified value so that the balancing force of the balance airbag is equal to the weight of the main weight and the intermediate weight 12; and the floating airbag having a second supporting force to support the weight of the floating weight 13 at the first floating height.

[0102] Secondly, this application also provides a controllable vibration source, including the controllable vibration source frequency divider vibrator as described above; and a transport chassis, wherein the controllable vibration source frequency divider vibrator is movably connected to the transport chassis along the height direction, and the transport chassis is used to transport the controllable vibration source frequency divider vibrator.

[0103] In this embodiment, the transport chassis can be a vehicle, on which a controllable source frequency divider vibrator is installed. When the vehicle starts and the controllable source frequency divider vibrator needs to be transported to the next destination, the controllable source frequency divider vibrator can be raised away from the ground. When the next destination is reached, the controllable source frequency divider vibrator can be lowered to the ground to vibrate.

[0104] The controllable vibration source provided in this application includes a controllable vibration source frequency divider vibrator, and therefore includes all the technical features and technical effects of the controllable vibration source frequency divider vibrator as described above, which will not be repeated here.

[0105] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0106] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A controllable source frequency-division vibrator, characterized in that, include: The support structure has a base plate, column assemblies, and support beams. The base plate is used to fit against the ground, and the support beams are fixed to the base plate through the column assemblies. The support beams are also arranged parallel to the base plate. A counterweight assembly, comprising at least a main counterweight and an intermediate counterweight, wherein the main counterweight is movably connected to the base plate and is used to reciprocate in a direction perpendicular to the base plate to transmit the vibration to the ground through the base plate, and the intermediate counterweight is disposed above the main counterweight. A floating airbag is provided on the support beam and is located on the side of the intermediate counterweight facing the main counterweight. The floating airbag has different floating heights. When the floating airbag has a first floating height, the floating airbag lifts the intermediate weight, the intermediate weight moves away from the main weight, and the controllable vibration source frequency divider vibrator is in the first excitation mode. When the floating airbag has a second floating height, the floating airbag does not lift the intermediate weight, the intermediate weight is pressed against the main weight, and the controllable vibration source frequency divider vibrator is in the second excitation mode. Wherein, the first excitation mode and the second excitation mode do not overlap in at least part of their frequency bandwidth.

2. The controllable source frequency divider vibrator according to claim 1, characterized in that, The counterweight assembly also includes: A floating weight, which is located above the floating airbag and is detachably connected to the intermediate weight; When the floating airbag has a first floating height and the floating weight and the intermediate weight are connected, the floating airbag lifts the intermediate weight and the floating weight, the intermediate weight and the floating weight move away from the main weight, and the controllable vibration source frequency divider vibrator is in the first excitation mode. When the floating airbag has a first floating height, the floating weight and the intermediate weight are in a disassembled state, the intermediate weight is pressed against the main weight, and the floating weight is far away from the main weight, the controllable vibration source frequency divider vibrator is in a second excitation mode. When the floating airbag has a second floating height and the floating weight and the intermediate weight are both pressed on the main weight, the controllable vibration source frequency divider vibrator is in the third excitation mode.

3. The controllable source frequency divider vibrator according to claim 2, characterized in that, The main weight has a first surface and two second surfaces adjacent to the first surface; there are two intermediate weights, which are symmetrically arranged at both ends of the first surface along a first direction. The intermediate counterweight includes a first portion having a third surface facing the main counterweight and a fourth surface facing the floating counterweight. Both the third and fourth surfaces are parallel to the first surface of the main counterweight. The first portion is positioned on the first surface of the main counterweight and is detachably connected to it. The intermediate counterweight includes a first part and a second part. The thickness of the first part is greater than the thickness of the second part. The first part and the second part are connected to form an L-shaped structure. The first part has a third surface facing the main counterweight and a fourth surface facing the floating counterweight. The third surface and the fourth surface are both surfaces parallel to the first surface of the main counterweight. The first part is used to be placed on the first surface of the main counterweight and is detachably connected to the first surface of the main counterweight. The second part is used to be detachably connected to the second surface. Wherein, the first direction is the direction of the line connecting the center points of the two second surfaces.

4. The controllable source frequency divider vibrator according to claim 3, characterized in that, The floating weight includes two third parts and two fourth parts. Each third part is detachably connected to the two fourth parts on both sides along a first direction. Each third part is symmetrically arranged along the first direction. The two third parts and the two fourth parts are connected in sequence to form a ring structure. The side of the third part near the main weight has a protrusion of a preset height relative to the side of the fourth part near the intermediate weight. The third part is arranged corresponding to at least a portion of the main weight and is used for detachable connection with the main weight. The fourth part is arranged corresponding to at least a portion of the first part and is used for detachable connection with the first part. The third part has a fifth surface facing the main weight, and the fourth part has a sixth surface facing the intermediate weight. The fifth surface and the sixth surface are both planes arranged parallel to the first surface.

5. The controllable source frequency divider vibrator according to claim 4, characterized in that, The first surface of the main weight, the first part of the intermediate weight, and the fourth part of the floating weight are detachably connected by a first connector. The first connector includes a first rod-shaped structure, a second rod-shaped structure, a third rod-shaped structure, and a fourth rod-shaped structure arranged sequentially along the length direction. At least the first rod-shaped structure and the fourth rod-shaped structure have external threads. The third rod-shaped structure has a tightening portion located between the first end and the second end of the third rod-shaped structure and close to the second rod-shaped structure, for tightening the first rod-shaped structure to the main counterweight through the tightening portion.

6. The controllable source frequency divider vibrator according to claim 4, characterized in that, The first surface of the main weight and the first part of the intermediate weight are detachably connected by a second connector. The second connector includes an external hexagonal head screw; The main counterweight has a first threaded hole perpendicular to the first surface; The intermediate counterweight has a first connecting hole that penetrates the first portion along the thickness direction of the first portion. The external hexagonal head screw passes through the first connecting hole and is threadedly connected to the first threaded hole. The first connecting hole includes an inner countersunk hole near the fourth surface. The diameter of the inner countersunk hole is adapted to the fastening sleeve of the external hexagonal head screw.

7. The controllable source frequency divider vibrator according to claim 6, characterized in that, Also includes: A first limiting block is disposed between the base plate and the main weight; and / or the first limiting block is disposed on the side of the main weight facing the floating weight; The second limiting block is disposed on the support beam and is adjacent to the floating airbag, located between the support beam and the floating counterweight.

8. The controllable source frequency divider vibrator according to claim 1, characterized in that, The floating airbag includes multiple floating airbags, each having a floating pressure regulating valve and a first deflation valve. The floating pressure regulating valve is used to inflate the floating airbag, and the first deflation valve is used to deflate it.

9. The controllable source frequency divider vibrator according to claim 1, characterized in that, Also includes: Multiple balancing airbags are disposed between the base plate and the main weight. Each balancing airbag has a balancing pressure regulating valve and a second deflation valve. The balancing pressure regulating valve is used to inflate the balancing airbag, and the second deflation valve is used to deflate it.

10. A controllable seismic source, characterized in that, Includes a controllable source frequency divider vibrator as described in any one of claims 1 to 9; The system includes a transport chassis on which the controllable vibration source frequency divider is movably connected along the height direction, and the transport chassis is used to transport the controllable vibration source frequency divider.

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