CN111694049A - Transverse wave excitation source device and using method thereof - Google Patents

Abstract

The invention proposes a shear wave excitation source device and a method for using the same. The device includes a telescopic support base, a guide wheel, a rigid rope, a rope take-up member, an electromagnet, a limit plate, a swing rod, an excitation hammer and a hammer. member. When the device is working, the electromagnet is energized to generate a magnetic force to adsorb the vibration hammer, and the rope-receiving member is actuated. The electromagnet and the vibration hammer move upward along a circular arc. The hammer member fixed on the ground is struck horizontally to complete a shear wave excitation. In the present invention, the vibration excitation hammer can be disassembled and assembled, the size can be selected, and the excitation energy can be controlled; the vibration excitation can be quickly realized by the electromagnet adsorbing and releasing the vibration excitation hammer; the whole device is easy to disassemble and assemble, and is suitable for field operations.

Description

A shear wave excitation source device and a method of using the same

technical field

The invention belongs to the technical field of geophysical exploration, and in particular relates to a shear wave excitation source device and a method for using the same.

Background technique

Seismic waves are classified into two major categories: longitudinal waves and shear waves. Longitudinal waves refer to compression waves, that is, the vibration direction of protons is consistent with the direction of propagation; shear waves are shear waves, that is, the vibration direction of protons is perpendicular to the direction of wave propagation. Shear wave velocity is an important parameter to study the dynamic characteristics of rock and soil, which is of great significance to future research.

However, in the prior art, the common seismic shear wave excitation source is mainly generated by two methods: artificial excitation or explosive detonator. However, the above methods have the following defects: 1) The artificial excitation method is to knock the source and the source vehicle with a hand-held sledgehammer. There are a series of problems such as unstable energy and uncontrollable energy generation. Although the excitation energy of the vibrator vehicle can meet the problem of exploration depth, there are a series of problems such as high requirements for working conditions, complicated operation and high cost. 2) The vibration excitation effect of explosives is good, but there are many restrictions on their use in cities. Therefore, there is an urgent need in the prior art for a new shear wave excitation source device that can be easily carried for field operations and has stable and controllable excitation energy.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a shear wave excitation source device and a method for using the same, which have the advantages of being convenient to carry, quickly realizing shear wave excitation, generating stable and controllable energy, and not being affected by fields under the premise of saving manpower. The device is widely used in technical fields such as geophysical exploration. To achieve the above object, the present invention adopts the following technical solutions:

A shear wave excitation source device, comprising:

a base, on which a guide wheel is rotatably arranged; a rigid rope is wound on the guide wheel; one end of the rigid rope is connected to a rope-receiving member, and the other end is connected to an electromagnet; the electromagnet and a power supply connected in series; a control switch is arranged between the electromagnet and the power supply;

a swinging rod for driving the vibration-exciting hammer to swing with the base as a base point, one end of the swinging rod is rotatably mounted on the base, and the other end is connected to the vibration-exciting hammer;

a limit plate, one end of the limit plate is fixed on the upper surface of the base; the limit plate is horizontally arranged and located above the swing rod; a section of the limit plate away from the base opens a limit The rigid rope passes through the limit hole; the electromagnet is located below the limit plate; when the swing rod rotates to a horizontal position, the swing rod is parallel to the limit plate and the limit hole is matched with the electromagnet;

a telescopic support for adjusting the height of the base, so that the vibration excitation hammer hammers a hammering member in a horizontal direction, and the upper end of the telescopic support is fixed on the bottom surface of the base; the hammer The striking member is located directly below the base.

Preferably, the base comprises a pair of bottom plates arranged symmetrically up and down;

Each of the bottom plates is provided with a vertical through groove for accommodating the swing rod and a hemispherical groove for limiting the swing rod; a pair of opposite sides of the bottom plate are respectively provided with a The hemispherical groove; wherein:

the vertical through slot extends to the edge of the bottom plate; the swing rod swings along the vertical through slot;

The hemispherical groove intersects with a section of the vertical through groove away from the edge; one end of the swing rod rotates in the space enclosed by a pair of the hemispherical grooves.

Preferably, the hammer member is a steel plate.

Preferably, the rope take-up member includes a gear reduction box; the input end of the gear reduction box is connected to a hand wheel; the output end of the gear reduction box is connected to a wheel; the outer edge of the wheel is wound around the Rigid rope.

Preferably, the gear reduction box includes a first gear and a second gear meshed with the first gear; the diameter of the first gear is smaller than the diameter of the second gear; the gear shaft of the first gear is on the Install the handwheel.

Preferably, the telescopic bracket includes three brackets; the bottom of the bracket is provided with a fixed roller; the length of the bracket ranges from 1.1m to 1.9m.

Preferably, the inside of the swing rod is hollow.

Preferably, the maximum suction force of the electromagnet is 100kg.

The present invention also proposes a method for using the shear wave excitation source device, which includes the following steps based on the shear wave excitation source device:

(1) At the point of shear wave excitation, fix the hammer member;

(2) Adjusting the length of the adjustable bracket, so that when the swing rod rotates to a vertical position, the vibration excitation hammer hammers the hammering member in a horizontal direction;

(3) Actuating the control switch to connect the power supply and the electromagnet; the exciter hammer is adsorbed to the bottom of the electromagnet;

(4) Actuating the rope-receiving member, the rope-receiving member drives the rigid rope to move, the rigid rope drives the guide wheel to rotate, and the swing rod rotates upward along a circular arc with the base as the base point;

(5) When the electromagnet is matched with the limit hole, the control switch is actuated again, the electromagnet releases the excitation hammer, and the vibration excitation hammer and the swing rod move along the arc Rotate downward, when the swing rod rotates to a vertical position, the vibration excitation hammer horizontally hammers the hammer member, and thus, a shear wave excitation is achieved.

Compared with the prior art, the advantages of the present invention are:

(1) When the device is working, the electromagnet is used to generate a magnetic force to provide upward movement force for the exciter hammer, the electromagnet is powered off to release the exciter hammer, and the action of gravity is used to make the exciter hammer strike in the horizontal direction when it is in a vertical position. The steel plate fixed on the ground completes the shear wave excitation. Therefore, the shear wave excitation can be realized quickly and stably.

(2) The vibration excitation hammer can be disassembled and assembled, and the size is optional, which can meet the seismic wave energy excitation of the current seismic exploration, and can realize the controllable excitation energy.

(3) The device is easy to disassemble, easy to transport, and has a wide range of work applications and small limitations.

(4) During a hammering process, the weight of the excitation hammer is fixed and the height of the landing point is fixed, which can effectively solve the problem of uneven energy signals in the artificial excitation process.

(5) The use of a gear reducer can reduce the working strength of manual hammering of steel plates.

Description of drawings

1 is a structural diagram of a shear wave excitation source device according to an embodiment of the present invention;

Fig. 2 is the structural representation of the swing rod and the vibration excitation hammer in Fig. 1;

Fig. 3 is the top view of the limit plate in Fig. 1;

FIG. 4 is a perspective view of the bottom plate in FIG. 1 .

Among them, 1-electromagnet, 2-exciting hammer, 3-swing rod, 4-limiting plate, 5-rigid rope, 6-guide wheel, 7-base, 71-bottom plate, 710-hemispherical groove, 711 -Vertical channel, 8- retractable bracket, 9-adjusting bolt, 10-fixable roller, 11-hammering member, 12-gear reduction box, 13-handwheel.

Detailed ways

The present invention will be described in more detail below with reference to the schematic diagrams, wherein preferred embodiments of the present invention are shown, and it should be understood that those skilled in the art can modify the present invention described herein and still achieve the advantageous effects of the present invention. Therefore, the following description should be construed as widely known to those skilled in the art and not as a limitation of the present invention.

A transverse wave excitation source device, comprising: a retractable bracket 8, a base 7, a guide wheel 6, a rigid rope 5, a rope retracting member, an electromagnet 1, a limit plate 4, a swing rod 3, an excitation hammer 2 and a hammer Member 11.

In this device, the hammering member 11, the retractable bracket 8, the base 7, and the guide wheel 6 are arranged in order from bottom to top; the rigid rope 5 is used to connect the rope-receiving member and the electromagnet 1; the swing rod 3 is used to drive the excitation hammer 2 swings; the limit plate 4 is used to limit the swing range of the swing rod 3; the electromagnet 1 is used to adsorb or release the exciter hammer 2 by changing the power-on state; the exciter hammer 2 is used to hammer the hammer member 11 in the horizontal direction to generate transverse waves. The specific structure of the device is shown in Figure 1:

A guide wheel 6 for changing the direction of the rigid rope 5 is rotatably arranged on the base 7 ; a rigid rope 5 is wound on the guide wheel 6 ; Preferably, the rigid rope 5 is a steel rope.

The electromagnet 1 is connected in series with the DC power supply; a control switch is arranged between the electromagnet 1 and the DC power supply. The power-on or power-off of the electromagnet 1 is realized by manually operating the control switch. The electromagnet 1 is energized to attract the vibration hammer 2; the electromagnet 1 is powered off to release the vibration hammer 2. Among them, the electromagnet 1 is a disc type electromagnet, and the maximum suction force is 100kg.

The swing rod 3 is used to drive the exciter hammer 2 to swing with the base 7 as the base point. In this embodiment, the length of the swing rod 3 should satisfy: when the swing rod 3 rotates to the vertical direction, there is a gap between the swing rod 3 and the supporting surface on which the hammering member 11 is placed, and the swing rod 3 can be hammered in the horizontal direction Hammer member 11 .

In this embodiment, the mass of the exciter hammer 2 is 5KG-75KG; the exciter hammer 2 and the swing rod 3 are provided with corresponding threaded holes, and the exciter hammer 2 and the swing rod 3 are fixed by bolts.

In this embodiment, the swing rod 3 is a hollow rod, and the mass of the swing rod 3 is small and meets the strength conditions for supporting the exciter hammer 2; one end of the limit plate 4 is fixed on the upper surface of the base 7 by a fastener, For example, it is fixed by bolts; the limit plate 4 is arranged horizontally and is located above the swing rod 3; a section of the limit plate 4 away from the base 7 is provided with a limit hole, and the function of the limit hole is: when the electromagnet 1 loses power, the electromagnet 1 will not swing freely with the wire rope, and ensure that the wire rope will not be separated from the guide wheel 6, and the rigid rope 5 will pass through the limit hole; as shown in Figure 3 and Figure 1; the electromagnet 1 is located below the limit plate 4. When the rigid rope 5 drives the permanent magnet to move up to the position where the permanent magnet is clamped into the limit hole (that is, when the limit hole is matched with the electromagnet 1 ), the permanent magnet is attached to the lower end surface of the limit plate 4 and swings The lever 3 is rotated to a horizontal position and the swing lever 3 is parallel to the limiting plate 4 .

In this embodiment, the fixed end of the limit plate 4 is flush with the end of the swing rod 3 connected to the base 7; the distance between the limit hole and the base 7 is equal to the length of the swing rod 3 to ensure that when the swing rod 3 rotates to the horizontal position , the swing rod 3 is parallel to the limit plate 4 and the magnet is clamped into the limit hole.

The telescopic bracket 8 is used to adjust the height of the base 7, so that the exciter hammer 2 hammers a hammering member 11 in the horizontal direction, and the upper end surface of the telescopic bracket 8 is fixed on the bottom surface of the base 7 by bolts; the hammering member 11 is located below the base 7. Preferably, the retractable bracket 8 includes three brackets; the bottom of the bracket is provided with a fixable roller 10, after the length adjustment process of the adjustable bracket is completed, the fixable roller 10 is fixed to ensure the stability of the retractable bracket 8; the length of the bracket The range is 1.1m~1.9m.

As shown in Figure 1, each bracket includes two adjusting rods and a sleeve; one end of one adjusting rod is sleeved in the other adjusting rod; the sleeve is sleeved on the overlapping part of the adjusting rod, the two adjusting rods and the sleeve Corresponding threaded holes are arranged on both; the sleeve is fixed on the two adjusting rods by an adjusting bolt 9 . The steps of adjusting the length of the telescopic bracket 8 are as follows: loosen the adjusting bolt 9 installed on the sleeve, then pull out the adjusting rod with a smaller diameter or retract it into a section of the adjusting rod with a larger diameter, and then tighten the adjusting bolt 9. Can.

In this embodiment, as shown in FIG. 1 , FIG. 2 and FIG. 4 , the preferred structural design of the base 7 is as follows: the base 7 includes a pair of bottom plates 71 arranged symmetrically up and down; the cross section of the bottom plate 71 is a circle; The base 7 is formed by being fixedly arranged between them. Each bottom plate 71 is provided with a vertical through groove 711 for accommodating the swing rod 3 and a hemispherical groove 710 for limiting the swing rod 3; the opposite sides of the pair of bottom plates 71 are respectively provided with hemispherical grooves Slot 710; wherein: the vertical through groove 711 extends to the edge of the bottom plate 71; the swing rod 3 swings along the vertical through groove 711; the hemispherical groove 710 intersects with a section of the vertical through groove 711 away from the edge, that is, the hemispherical groove The part where the slot 710 and the vertical through slot 711 intersect is a hollow structure to ensure that the swing rod 3 can smoothly swing along the vertical through slot 711 within a range of 90 degrees (rotated from a horizontal position to a vertical position); one end of the swing rod 3 It rotates in the space enclosed by a pair of hemispherical grooves 710 .

In view of the above structural design of the bottom plate 71, the structural design of the swing rod 3 is as follows: one end of the swing rod 3 is a spherical part, and the spherical part is limited in the space enclosed by a pair of hemispherical grooves 710; The rod part swings along the vertical through groove 711;

In this embodiment, the rope-receiving member includes a gear reduction box 12; the input end of the gear reduction box 12 is connected to a hand wheel 13; the output end of the gear reduction box 12 is connected to a wheel; the outer edge of the wheel is wound with a rigid rope 5 . The gear reduction box 12 includes a first gear and a second gear meshing with the first gear; the diameter of the first gear is smaller than the diameter of the second gear; the handwheel 13 is installed on the gear shaft of the first gear, which can save manpower and reduce manual work strength.

This embodiment also proposes a method for using the shear wave excitation source device, including steps (1) to (5), as follows:

(1) At the point of shear wave excitation, fix the steel plate;

(2) The length adjustment of the adjustable bracket is completed by moving the adjusting bolt 9 and the two adjusting rods, so that when the swing rod 3 rotates to the vertical position, the vibration excitation hammer 2 hammers the steel plate in the horizontal direction;

(3) The action control switch connects the power supply and the electromagnet 1; the electromagnet 1 is energized, and the excitation hammer 2 is adsorbed to the bottom of the electromagnet 1;

(4) Actuating the hand wheel 13, the wheel disc at the gear reduction box 12 drives the wire rope to move, the wire rope drives the guide wheel 6 to rotate, and the swing rod 3 rotates upward along a circular arc with the base 7 as the base point;

(5) When the electromagnet 1 is clamped in the limit hole, actuate the control switch again, the electromagnet 1 loses power, the electromagnet 1 releases the excitation hammer 2, and the excitation hammer 2 and the swing rod 3 rotate downward along the arc , when the swing rod 3 rotates to the vertical position, the vibration-exciting hammer 2 hammers the steel plate horizontally in the horizontal direction. So far, a shear wave excitation is achieved.

The above are only preferred embodiments of the present invention, and do not have any limiting effect on the present invention. Any person skilled in the art, within the scope of not departing from the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, all belong to the technical solution of the present invention. content still falls within the protection scope of the present invention.

Claims (9)

1. A transverse wave excitation source device, comprising:

the base is rotatably provided with a guide wheel; a rigid rope is wound on the guide wheel; one end of the rigid rope is connected with a rope retracting component, and the other end of the rigid rope is connected with an electromagnet; the electromagnet is connected with a power supply in series; a control switch is arranged between the electromagnet and the power supply;

the swinging rod is used for driving the vibration hammer to swing by taking the base as a base point, one end of the swinging rod is rotatably installed on the base, and the other end of the swinging rod is connected with the vibration hammer;

one end of the limiting plate is fixed on the upper surface of the base; the limiting plate is horizontally arranged and is positioned above the oscillating rod; a section of the limiting plate, which is far away from the base, is provided with a limiting hole; the rigid rope penetrates through the limiting hole; the electromagnet is positioned below the limiting plate; when the swinging rod rotates to the horizontal position, the swinging rod is parallel to the limiting plate, and the limiting hole is matched with the electromagnet;

the telescopic support is used for adjusting the height of the base so that the vibration exciter can horizontally hammer a hammering component, and the upper end of the telescopic support is fixed on the bottom surface of the base; the hammering member is located directly below the base.

2. The shear wave excitation source device of claim 1, wherein the base includes a pair of bottom plates disposed symmetrically up and down;

each bottom plate is provided with a vertical through groove for accommodating the swing rod and a hemispherical groove for limiting the swing rod; the two opposite side surfaces of the pair of bottom plates are respectively provided with the hemispherical grooves; wherein:

the vertical through groove extends to the edge of the bottom plate; the swinging rod swings along the vertical through groove;

the hemispherical groove is intersected with a section of the vertical through groove far away from the edge; one end of the swinging rod rotates in a space defined by the pair of hemispherical grooves.

3. The shear wave excitation source apparatus of claim 1, wherein said hammering member is a steel plate.

4. The shear wave excitation source device of claim 1, wherein said take-up means comprises a gear reduction box; the input end of the gear reduction box is connected with a hand wheel; the output end of the gear reduction box is connected with a wheel disc; the outer edge of the sheave is wrapped around the rigid cord.

5. The shear wave excitation source device of claim 4, wherein the gear reduction box comprises a first gear and a second gear meshed with the first gear; the diameter of the first gear is smaller than that of the second gear; the handwheel is arranged on the gear shaft of the first gear.

6. The shear wave excitation source device of claim 1, wherein said telescopic support comprises three supports; the bottom of the bracket is provided with a fixable roller; the length range of the support is 1.1 m-1.9 m.

7. The shear wave excitation source device of claim 1, wherein said oscillating rod is hollow inside.

8. The shear wave excitation source device of claim 1, wherein the maximum value of the attraction force of the electromagnet is 100 kg.

9. A method for using a shear wave excitation source device according to any one of claims 1 to 8, comprising the steps of:

(1) fixing the hammering member at a transverse wave excitation point;

(2) adjusting the length of the adjustable bracket so that the hammer member is hammered in a horizontal direction by the hammer when the swing lever is rotated to a vertical position;

(3) actuating the control switch to communicate the power source and the electromagnet; the vibration hammer is adsorbed to the bottom of the electromagnet;

(4) the rope retracting component is actuated, the rope retracting component drives the rigid rope to move, the rigid rope drives the guide wheel to rotate, and the swinging rod upwards rotates along an arc by taking the base as a base point;

(5) when the electromagnet and the limiting hole are matched, the control switch is actuated again to disconnect the power supply and the electromagnet, the electromagnet releases the vibration hammer, the vibration hammer and the swinging rod rotate downwards along the circular arc, and when the swinging rod rotates to a vertical position, the vibration hammer hammers the hammering component along the horizontal direction, so that one-time transverse wave vibration excitation is realized.

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