A vibrator assembly with a centering structure

Abstract

The present invention provides a vibrator assembly with a centering structure, including a plate assembly and a weight assembly, wherein the hammer body of the weight assembly is connected to the plate assembly by means of an elastic connector, and the two ends of the piston rod of the weight assembly are fixedly connected to the plate assembly by means of end covers; the elastic connector includes a centering spring, a centering spring seat and a centering spring seat limit seat, and a centering spring mounting hole is provided in the hammer body, and the centering spring is tightly matched with the centering spring mounting hole of the hammer body through tolerance matching. The closed box-type structure design of the present invention has strong torsion resistance and sufficient rigidity, which makes the overall performance of the vibrator assembly more stable, while saving space, greatly reducing the length and width of the whole vehicle, which is conducive to urban exploration. The mechanical structure is more stable and stronger, and compared with airbags, it has longer wear resistance and longer service life.

Description

Technical Field

[0001] The invention belongs to the technical field of shallow geophysical exploration, and in particular relates to a vibrator assembly with a centering structure of a small-tonnage shear wave controllable vibrator. Background Art

[0002] P-wave controllable vibrators (hammer vibrates in the vertical direction) have been widely recognized and applied on a large scale in the field of seismic exploration. Compared with P-wave vibration, S-wave vibration has a lower wave velocity and a shorter wavelength. Generally speaking, S-wave controllable vibrators are used in shallow S-wave seismic exploration and urban exploration. They can identify the location of shallow faults and divide different engineering geological zones on the profile, providing a reliable geological basis for urban earthquake prevention planning, earthquake safety evaluation, construction project site selection, foundation treatment, etc. Similarly, the output level of the S-wave controllable vibrator is positively correlated with the size of the vibrator assembly, and due to the limitation of the frame space structure, the S-wave vibrator assembly structure is relatively compact and more complex to design. Summary of the invention

[0003] The present invention solves the problems of the prior art, provides a vibrator assembly with a centering structure, and ensures that the output of the vibrator is stable, the signal collection is more accurate, and the overall mechanical structure of the vibrator assembly is more reasonable.

[0004] The technical solution adopted by the present invention is: a vibrator assembly with a centering and centering structure, including a plate assembly and a heavy hammer assembly, the hammer body of the heavy hammer assembly is connected to the plate assembly by means of an elastic connecting piece, and the two ends of the piston rod of the heavy hammer assembly are fixedly connected to the plate assembly by means of end covers; the elastic connecting piece includes a centering spring, a centering spring seat and a centering spring seat limiting seat, a centering spring mounting hole is provided in the hammer body, the centering spring is tightly matched with the centering spring mounting hole of the hammer body through tolerance fitting, an annular groove is provided on the centering spring seat, the centering spring forms an integral structure with the centering spring seat by means of the annular groove, the centering spring seat is connected to the centering spring seat limiting seat by clearance fitting, and the centering spring seat limiting seat is threadedly connected to the plate assembly.

[0005] Furthermore, the end cover is engaged with the center hole of the plate assembly and is fixedly connected with the plate assembly by means of the first screw hole and the screw, and the piston rod is engaged with the inner side of the end cover and is fixed by means of the second screw hole and the screw.

[0006] Furthermore, the end cover is provided with a mounting stop, the second screw hole is located in the mounting stop, and the end cover is also provided with an ejector hole.

[0007] Furthermore, the plate assembly includes a left plate and a right plate, and the left plate and the right plate are fixedly connected by means of fixing bolts and self-locking nuts. Fixing holes are provided on the left plate and the right plate, and one end of the fixing bolt passes through the fixing holes of the left plate and the right plate and is fixed with a self-locking nut. A flat washer is also provided on the fixing bolt.

[0008] Furthermore, positioning pin installation holes are provided on the contact surfaces of the left plate and the right plate, and positioning pins are provided in the positioning pin installation holes.

[0009] Furthermore, the bottom of the flat plate assembly is connected to a base plate assembly, the bottom surface of the base plate assembly has fixing teeth, the base plate assembly is provided with base plate mounting holes and lifting process holes, and the base plate assembly is fixedly connected to the flat plate assembly by means of base plate bolts and base plate mounting holes.

[0010] Furthermore, the side surface of the hammer body is connected to the flat plate assembly by means of a limiting and straightening device, and the limiting and straightening device comprises an adjusting bolt, a limiting locking plate, a limiting lower pressure plate and a limiting block; the limiting locking plate is fixedly connected to the flat plate assembly by means of a limiting bolt, one side surface of the limiting block is located in the limiting locking plate, and the other side surface is in contact with the hammer body, one end of the adjusting bolt passes through a screw hole on the limiting locking plate and contacts with the limiting lower pressure plate, the limiting lower pressure plate is located in the limiting locking plate and between the limiting block and the adjusting bolt, and a locking nut is also provided on the adjusting bolt.

[0011] Furthermore, the elastic connecting members are in four groups, evenly distributed on the hammer body.

[0012] Furthermore, the position limiting and straightening devices are in four groups, evenly distributed on the hammer body.

[0013] The beneficial effects obtained by the present invention are:

[0014] 1. The centering and aligning structure is a purely mechanical structure, and its structure is simpler than the prior art. The prior art is a centering airbag, which requires an external air path to be realized. 2. The closed box-type structure design has strong torsional resistance and sufficient rigidity, making the overall performance of the vibrator assembly more stable, while saving space, greatly reducing the length and width of the vehicle, which is beneficial for urban exploration. 3. The mechanical structure is more stable and stronger, and has longer wear resistance and service life compared to airbags. 4. The prior art only centers on one side, and the present invention adopts bilateral two-way centering, which has more stable performance. 5. The centering and aligning structure can improve the deviation problem during the vibration of the heavy hammer assembly, and ensure that the hammer body reciprocates along the normal track at the center of the piston rod.

[0015] The basic functions of the present invention are as follows: 1. During normal operation, the weight assembly performs orderly reciprocating piston motion in the flat plate assembly. At this time, the centering and centering structure plays a vibration isolation role and reduces energy loss. 2. Since the vibration of the weight assembly belongs to variable frequency motion, the force curve is symmetrical and the displacement curve is asymmetrical, so the shear wave source often has a tendency to vibrate to one side. This structural component can effectively prevent the weight from vibrating to one side and ensure that the weight vibrates back and forth in the center position, making the signal more stable, more simulated, and the acquisition effect more accurate. 3. During the calibration process, the centering and centering structure can make the weight assembly move slowly during the rightward movement, reduce the instantaneous violent impact of the piston ring groove on the copper sleeve, effectively prevent and reduce damage to the copper sleeve, and ensure the life of the copper sleeve. 4. Keep the hammer body in the weight assembly symmetrically in the center under no pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall cross-sectional structure of the present invention is shown in FIG. Figure 1 ;

[0017] Figure 2 The overall cross-sectional structure of the present invention is shown in FIG. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the connection of the flat panel assembly of the present invention;

[0019] Figure 4 For the present invention Figure 3 Enlarged view of part A in the middle;

[0020] Figure 5 It is a schematic diagram of the side structure of the end cover of the present invention;

[0021] Figure 6 For the present invention Figure 5 Schematic diagram of the cross-section structure at DD in the middle;

[0022] Figure 7 It is a schematic diagram of the side structure of the elastic connecting member of the present invention;

[0023] Figure 8 The elastic connector of the present invention Figure 7 Sectional view at EE;

[0024] Fig. 9 This is a schematic diagram of the bottom plate assembly structure of the present invention;

[0025] Fig.10 It is a side view of the bottom plate assembly of the present invention;

[0026] Fig.11 It is a schematic diagram of the structure of the position limiting and righting device of the present invention;

[0027] Fig.12 For the present invention Fig.11 Enlarged view of middle part B;

[0028] Fig.13 It is a schematic diagram of the hammer assembly structure of the present invention;

[0029] Fig.14 For the present invention Fig.13 Enlarged view of middle C;

[0030] Fig.15 The oil circuit of the hammer body of the present invention is Figure 1 ;

[0031] Fig.16 The oil circuit of the hammer body of the present invention is Figure 2 .

[0032] 1 represents the left plate, 2 represents the right plate, 3 represents the centering spring, 4 represents the centering spring seat, 5 represents the centering spring seat limit seat, 6 represents the piston rod, 7 represents the end cover, 8 represents the hammer body, 9 represents the limit straightening device, 10 represents the bottom plate assembly, 21 represents the fixing bolt, 22 represents the self-locking nut, 23 represents the flat washer, 24 represents the positioning pin, 31 represents the installation stop, 32 represents the first screw hole, 33 represents the second screw hole, 34 represents the ejector pin hole, 41 represents the working chamber A, 42 represents the working chamber B, 43 represents the servo valve manifold, 44 represents Table servo valve assembly, 45 represents cylinder liner, 46 represents large copper sleeve, 47 represents small copper sleeve, 48 represents hammer end cover, 49 represents piston ring, 61 represents base plate mounting hole, 62 represents lifting process hole, 63 represents fixing tooth, 71 represents adjusting bolt, 72 represents limit locking plate, 73 represents limit lower pressure plate, 74 represents limit block, 75 represents locking nut, 411 represents first dustproof ring, 412 represents double-lip PTFE dustproof ring, 413 represents oil seal, 414 represents O-ring, 81 represents servo valve manifold oil channel hole, 82 represents hammer oil channel hole. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] like Figure 1-12As shown, a vibrator assembly with a centering and centering structure includes a plate assembly and a weight assembly, wherein the hammer body 8 of the weight assembly is connected to the plate assembly by means of an elastic connecting piece, and the two ends of the piston rod 6 of the weight assembly are fixedly connected to the plate assembly by means of end covers 7; the elastic connecting piece includes a centering spring 3, a centering spring seat 4 and a centering spring seat limiting seat 5, a centering spring mounting hole is provided in the hammer body 8, the centering spring 3 is tightly matched with the centering spring mounting hole of the hammer body 8 by tolerance fit, an annular groove is provided on the centering spring seat 4, the centering spring 3 forms an integral structure with the centering spring seat 4 by means of the annular groove, the centering spring seat 4 is connected to the centering spring seat limiting seat 5 by clearance fit, and the centering spring seat limiting seat 5 is threadedly connected to the plate assembly.

[0035] The end cover 7 is engaged on the center hole of the flat plate assembly and is fixedly connected to the flat plate assembly by means of the first screw hole 32 and the screw. The piston rod 6 is engaged on the inner side of the end cover 7 and is fixed with the screw by means of the second screw hole 33. The end cover 7 is provided with a mounting stop 31, and the second screw hole 33 is located in the mounting stop 31. The end cover 7 is also provided with a pin hole 34.

[0036] The plate assembly includes a left plate 1 and a right plate 2, which are fixedly connected by means of fixing bolts 21 and self-locking nuts 22. Fixing holes are provided on the left plate 1 and the right plate 2. One end of the fixing bolt 21 passes through the fixing holes of the left plate 1 and the right plate 2 and is fixed by the self-locking nut 22. A flat washer 23 is also provided on the fixing bolt 21. Positioning pin mounting holes are provided on the contact surfaces of the left plate 1 and the right plate 2, and positioning pins 24 are provided in the positioning pin mounting holes.

[0037] The bottom of the flat plate assembly is connected to a base plate assembly 10, the bottom surface of the base plate assembly 10 has fixing teeth 63, the base plate assembly 10 is provided with base plate mounting holes 61 and lifting process holes 62, and the base plate assembly 10 is fixedly connected to the flat plate assembly by means of base plate bolts and base plate mounting holes 61.

[0038] The side of the hammer body 8 is connected to the flat plate assembly by means of a limiting and straightening device 9, and the limiting and straightening device 9 includes an adjusting bolt 71, a limiting locking disk 72, a limiting lower pressure plate 73 and a limiting block 74; the limiting locking disk 72 is fixedly connected to the flat plate assembly by means of a limiting bolt, one side of the limiting block 74 is located in the limiting locking disk 72, and the other side is in contact with the hammer body 8, one end of the adjusting bolt 71 passes through the screw hole on the limiting locking disk 72 and contacts with the limiting lower pressure plate 73, the limiting lower pressure plate 73 is located in the limiting locking disk 72, and between the limiting block 74 and the adjusting bolt 71, and a locking nut 75 is also provided on the adjusting bolt 71.

[0039] The elastic connecting members are four groups, evenly distributed on the hammer body 8. The position limiting and straightening devices 9 are four groups, evenly distributed on the hammer body 8.

[0040] When implementing: Figure 1 , 7 As shown in , 8, the elastic connector includes a centering spring 3, a centering spring seat 4 and a centering spring seat limit seat 5. The hammer body 8 is provided with a centering spring installation hole. The centering spring 3 is tightly matched with the centering spring installation hole of the hammer body 8 through tolerance fit. The centering spring seat 4 is provided with an annular groove. The centering spring 3 and the centering spring seat 4 form an integral structure with the annular groove. The centering spring seat 4 is connected to the centering spring seat limit seat 5 through clearance fit. The centering spring seat limit seat 5 is threadedly connected to the plate assembly. There are four groups of elastic connectors, which are evenly and symmetrically installed on both sides of the plate.

[0041] like Figure 3-4 As shown, the plate assembly includes a left plate 1 and a right plate 2, which are fixedly connected by means of fixing bolts 21 and self-locking nuts 22. Fixing holes are provided on the left plate 1 and the right plate 2. One end of the fixing bolt 21 passes through the fixing holes of the left plate 1 and the right plate 2 and is fixed by the self-locking nut 22. A flat washer 23 is also provided on the fixing bolt 21. Positioning pin mounting holes are provided on the contact surfaces of the left plate 1 and the right plate 2. Positioning pins 24 are provided in the positioning pin mounting holes. The positioning pins 24 limit the relative movement between the left plate 1 and the right plate 2 to ensure the internal size range.

[0042] like Figure 5-6 As shown, the end cover 7 is engaged on the center hole of the flat plate assembly, and is fixedly connected to the flat plate assembly by means of the first screw hole 32 and the screw, the piston rod 6 is engaged on the inner side of the end cover 7, and is fixed with the screw by means of the second screw hole 33; the end cover 7 is provided with a mounting stop 31, the second screw hole 33 is located in the mounting stop 31, and there is a threaded process pin hole 34 for easy disassembly.

[0043] like Figure 9-10 As shown, the bottom plate assembly 10 has a mounting hole 61, which is connected to the mounting holes on the left and right side plates by bolts; the hoisting process hole 62 is used during the hoisting process of the bottom plate assembly. When working, the fixing teeth 63 are embedded in the ground, so that the coupling effect between the plate assembly and the ground is better.

[0044] like Figure 11-12As shown, the limiting and straightening device 9 is composed of an adjusting bolt 71, a limiting locking plate 72, a limiting lower pressure plate 73, a limiting block 74 and a locking nut 75. The limiting block 74 is made to fit tightly against the hammer body 8 in the heavy hammer assembly by adjusting the bolt 71, and the adjusting bolt 71 is locked with the nut 75 after adjustment. There are four limiting and straightening devices 9 in the left and right side plate structures of the vibration, which can effectively prevent the hammer body 8 from swinging around the axis during the vibration process. Among them, the locking plate 72 is connected to the left and right side plates by bolts, and the function of the limiting lower pressure plate 73 is to prevent the limiting block 74 from being damaged when the adjusting bolt 71 is pressed down. The limiting block 74 is made of a wear-resistant material.

[0045] like Figure 13-16 As shown, the heavy hammer assembly consists of a hammer body 8 with a hammer body oil passage hole 82, a piston rod 6, a servo valve manifold 43, a servo valve assembly 44, a cylinder sleeve 45, a large copper sleeve 46 with an oil inlet, a small copper sleeve 47, a cover 48, a piston ring 49, an oil seal 413, a first dust ring 411, a double-lip PTFE dust ring 412, an O-ring 414 and other seals. The large copper sleeve 46, the small copper sleeve 47 and the cylinder sleeve 45 are installed into the hammer body 8 by means of clearance fit. The piston ring 49 and the piston rod 6 are assembled in advance and installed into the large copper sleeve 46, the small copper sleeve 47 and the cylinder sleeve 45 by means of clearance fit. The two ends of the hammer body 8 are installed by means of bolt connection with the hammer body end cover 48. The tolerance fit and seal selection involved are all carried out in accordance with the mechanical manual and the seal manual standards. After the vibrator assembly is assembled, the piston rod 6 is connected to the plate assembly. When working normally, the piston rod 6 is stationary, and the hydraulic system enters the hammer body oil passage hole 82 through the servo valve assembly 44 and the servo valve manifold 43, and then enters the large copper sleeve 46 with an oil inlet, and then enters the working chamber A41 of the cylinder sleeve 45. After the hydraulic oil enters the working chamber A41, it pushes the hammer body 8 to move along the oil inlet direction of the piston rod 6. At this time, the servo valve assembly 44 is reversed, and the hydraulic oil enters the other side of the working chamber B42, and the hammer body 8 moves to the other side along the piston rod 6. In this way, the servo valve assembly 44 is constantly reversed, and the working chamber A41 and the working chamber B42 are alternately fed and returned, and the heavy hammer assembly forms a regular reciprocating motion. The seal and O-ring 414 play a sealing role to prevent hydraulic oil leakage. The first dust ring 411 and the double-lip PTFE dust ring 412 play a dustproof role to prevent dust from entering the hydraulic system and polluting the hydraulic system.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibrator assembly with a centering structure, comprising a plate assembly and a weight assembly, characterized in that: The hammer body (8) of the heavy hammer assembly is connected to the plate assembly by means of an elastic connecting piece, and the two ends of the piston rod (6) of the heavy hammer assembly are respectively fixedly connected to the plate assembly by means of end covers (7); the elastic connecting piece comprises a centering spring (3), a centering spring seat (4) and a centering spring seat limiting seat (5); a centering spring mounting hole is provided in the hammer body (8); the centering spring (3) is tightly matched with the centering spring mounting hole of the hammer body (8) by tolerance fitting; an annular groove is provided on the centering spring seat (4); the centering spring (3) and the centering spring seat (4) form an integral structure by means of the annular groove; the centering spring seat (4) is connected to the centering spring seat limiting seat (5) by clearance fitting; the centering spring seat limiting seat (5) is threadedly connected to the plate assembly; The end cover (7) is engaged with the center hole of the plate assembly and is fixedly connected with the plate assembly by means of a first screw hole (32) and a screw; the piston rod (6) is engaged with the inner side of the end cover (7) and is fixed with the screw by means of a second screw hole (33); The plate assembly comprises a left plate (1) and a right plate (2), wherein the left plate (1) and the right plate (2) are fixedly connected by means of fixing bolts (21) and self-locking nuts (22), the left plate (1) and the right plate (2) are provided with fixing holes, one end of the fixing bolt (21) passes through the fixing holes of the left plate (1) and the right plate (2) and is fixed by means of the self-locking nut (22), and a flat washer (23) is also provided on the fixing bolt (21).

2. The vibrator assembly of the centering structure according to claim 1, characterized in that: The end cover (7) is provided with a mounting stopper (31), the second screw hole (33) is located in the mounting stopper (31), and the end cover (7) is also provided with an ejector hole (34).

3. The vibrator assembly with a centering structure according to claim 1, characterized in that: Positioning pin installation holes are provided on the contact surfaces of the left plate (1) and the right plate (2), and positioning pins (24) are provided in the positioning pin installation holes.

4. The vibrator assembly with a centering structure according to claim 1, characterized in that: The bottom of the flat plate assembly is connected to a base plate assembly (10), the bottom surface of the base plate assembly (10) is provided with fixing teeth (63), the base plate assembly (10) is provided with a base plate mounting hole (61) and a lifting process hole (62), and the base plate assembly (10) is fixedly connected to the flat plate assembly by means of base plate bolts and the base plate mounting holes (61).

5. The vibrator assembly with a centering structure according to claim 1, characterized in that: The side of the hammer body (8) is connected to the plate assembly by means of a limiting and straightening device (9), and the limiting and straightening device (9) comprises an adjusting bolt (71), a limiting locking plate (72), a limiting lower pressure plate (73) and a limiting block (74); the limiting locking plate (72) is fixedly connected to the plate assembly by means of a limiting bolt, one side of the limiting block (74) is located in the limiting locking plate (72), and the other side is in contact with the hammer body (8), one end of the adjusting bolt (71) passes through a screw hole on the limiting locking plate (72) and contacts with the limiting lower pressure plate (73), the limiting lower pressure plate (73) is located in the limiting locking plate (72) and between the limiting block (74) and the adjusting bolt (71), and a locking nut (75) is also provided on the adjusting bolt (71).

6. The vibrator assembly with a centering structure according to claim 1, characterized in that: The elastic connecting members are in four groups and are evenly distributed on the hammer body (8).

7. The vibrator assembly with a centering structure according to claim 5, characterized in that: The position limiting and straightening devices (9) are four groups, evenly distributed on the hammer body (8).

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