A pendulum impact source excitation device based on SH wave

Abstract

The present invention provides a pendulum impact source excitation device based on SH waves, comprising a mobile body and a striking module, a driving module and an anvil mounted on the mobile body; the striking module comprises a heavy hammer with a rotating shaft at the end; the driving module comprises an impact cylinder that strikes the heavy hammer to make it swing around the rotating shaft in a vertical plane, a clutch and a hydraulic motor connected to one end of the rotating shaft, and a brake connected to the other end of the rotating shaft; the anvil is arranged at the lowest point of the swing trajectory of the heavy hammer to receive the impact of the heavy hammer to generate an acceleration transverse wave, and the brake locks the rotating shaft after the heavy hammer hits the anvil. Beneficial effects of the present invention: the generated SH wave has large output energy, large detection depth, and high resolution, and can be applied to deep exploration of underground space.

Description

Technical Field

[0001] The invention relates to the technical field of underground space exploration equipment, and in particular to a pendulum impact source excitation device based on SH waves. Background Art

[0002] Seismic exploration sources are divided into explosive sources and non-explosive sources. Among them, explosive sources are dynamite sources. Non-explosive sources can be divided into controllable sources and impact sources. Controllable sources include: electric spark sources, electromagnetic controllable sources, hydraulic controllable sources, etc. Impact sources include: artificial heavy hammer sources, falling heavy hammer sources, impact tamping sources, and acceleration heavy hammer sources.

[0003] The acceleration hammer source is gradually improved and developed from the early drop weight source. The current acceleration hammer source reduces the weight mass and lifting height of the drop weight source, and increases its excitation speed through strong spiral springs, hydraulic pressure or air pressure and other driving methods to ensure the excitation energy.

[0004] Vibrator vehicles are very popular in the market, but there is no relatively complete and specific acceleration source excitation device on the market. The acceleration source excitation device can excite SH shear waves with deeper detection depth and higher resolution than the vibrator vehicle.

[0005] Therefore, with the rapid development of underground space exploration, the detection depth and resolution requirements of the required source excitation device are becoming higher and higher, and there is an urgent need to design and manufacture a complete and reliable acceleration source excitation device. Summary of the invention

[0006] In view of this, in order to solve the above problems, an embodiment of the present invention provides a pendulum impact source excitation device based on SH waves.

[0007] An embodiment of the present invention provides a pendulum impact source excitation device based on SH waves, comprising a mobile body and a striking module, a driving module and an anvil plate mounted on the mobile body;

[0008] The striking module comprises a heavy hammer with a rotating shaft at the end;

[0009] The driving module includes an impact cylinder for impacting the weight to make it swing around the rotating shaft in a vertical plane, a clutch and a hydraulic motor connected to one end of the rotating shaft, and a brake connected to the other end of the rotating shaft;

[0010] The anvil is arranged at the lowest point of the swing track of the weight to receive the impact of the weight to generate acceleration transverse waves, and the brake locks the rotating shaft after the weight hits the anvil.

[0011] Furthermore, the striking module and the driving module are installed on the mobile vehicle body through a top bracket, the top bracket is a right-angle trough structure, the upper part of which is provided with a horizontally arranged linear guide rail, and the lower part is passed through by the rotating shaft, the impact cylinder is fixed to the upper part of the top bracket and its output end is connected to the top block, and the top block is slidably set on the linear guide rail and aligned with the heavy hammer.

[0012] Furthermore, a motor seat is provided on one side of the top bracket, the clutch is arranged between the motor seat and the top bracket, the hydraulic motor is fixed on the motor seat, the brake is fixed on the other side of the top bracket and connected to the rotating shaft, the clutch is respectively connected to the rotating shaft and the hydraulic motor, and the clutch is separated when the weight swings downward and locked when the weight is lifted upward.

[0013] Furthermore, the cutting board is movably arranged on the movable vehicle body and can be raised and lowered in a vertical direction.

[0014] Furthermore, the anvil is fixed to the mobile body through a fixing plate, the anvil is arranged below the fixing plate, a plurality of constraint shafts extending vertically upward are provided on the anvil, a plurality of constraint holes are provided on the fixing plate, the constraint holes correspond one to one with the constraint shafts, each constraint shaft is inserted into a constraint hole and can move up and down, a vertically arranged hydraulic cylinder is also provided on the fixing plate, and an output end of the hydraulic cylinder is connected to the anvil.

[0015] Furthermore, the bottom of the cutting board is provided with nail teeth.

[0016] Furthermore, the clutch is a tooth clutch.

[0017] Furthermore, the movable vehicle body is a tracked vehicle.

[0018] The technical solution provided by the embodiments of the present invention has the following beneficial effects: a pendulum impact source excitation device based on SH waves of the present invention adopts an impact cylinder as the power drive for source excitation, which can enable the heavy hammer to obtain a faster initial speed and a larger acceleration, and the SH waves excited by the impact with the anvil plate have a large output energy, a large detection depth, and a high resolution, and can be suitable for deep exploration of underground space; after the heavy hammer hits and generates SH waves, the brake immediately locks the heavy hammer to avoid secondary impact and reduce interference; the clutch and the hydraulic motor cooperate to realize the automatic lifting of the heavy hammer without affecting the swing of the heavy hammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a pendulum impact type earthquake source excitation device based on SH wave of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle frame 5;

[0021] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle drive module 3;

[0022] Figure 4 yes Figure 1 A schematic diagram of the structure of the middle knocking module 2;

[0023] Figure 5 yes Figure 1 A schematic structural diagram of the middle chopping board 4.

[0024] In the figure: 1-mobile body, 2-strike module, 201-weight, 202-rotating shaft, 203-fixed block, 3-drive module, 301-impact cylinder, 302-clutch, 303-hydraulic motor, 305-top block, 4-anvil, 401-fixed plate, 402-hydraulic cylinder, 403-constraint shaft, 404-spike teeth, 5-frame, 501-top bracket, 502-base, 503-upper bracket, 504-bottom plate, 505-motor seat, 506-linear guide, 507-cylinder support plate, 508-opening groove. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0026] Please refer to Figure 1 An embodiment of the present invention provides a pendulum impact source excitation device based on SH waves, including a mobile body 1 and a striking module 2, a driving module 3 and an anvil 4 mounted on the mobile body 1.

[0027] Specifically, the mobile vehicle body 1 enables the seismic source excitation device to have a mobile function, which facilitates the transfer and transportation of the seismic source excitation device. In this embodiment, the mobile vehicle body 1 is a tracked vehicle, which can adapt to complex and harsh driving environments.

[0028] Please refer to Figure 2, the mobile body 1 is provided with a frame 5, the frame 5 is fixedly supported on the mobile body 1, and the frame 5 is used to support and fix the knocking module 2, the driving module 3 and the cutting board 4. Here, the frame 5 includes a base 502, an upper bracket 503, a bottom plate 504 and a top bracket 501. The base 502 is directly fixed on the mobile body 1 and has a large bearing area. The upper bracket 503 is a rectangular frame and is fixed to the upper surface of the base 502. The bottom plate 504 is fixed to the upper part of the upper bracket 503 and remains horizontal. The top bracket 501 is fixed on the bottom plate 504, and the knocking module 2 and the driving module 3 are installed on the mobile body 1 through the top bracket 501.

[0029] Please refer to Figure 3 and 4 The knocking module 2 includes a weight 201 with a rotating shaft 202 at the end. Here, a fixing block 203 is provided at the end of the weight 201, and the fixing block 203 is fixed to the middle of the rotating shaft 202. The top bracket 501 is a right-angled slot structure, and a linear guide rail 506 is horizontally arranged and extends along the front-to-back direction at the upper part thereof. The linear guide rail 506 is distributed on two opposite sides of the upper part of the top bracket 501. The rotating shaft 202 of the weight 201 is vertically arranged relative to the top bracket 501, and opening grooves 508 are provided on two opposite sides of the front side of the lower end of the top bracket 501. The rotating shaft 202 passes through the two opening grooves 508 and is rotatable.

[0030] The driving module 3 includes an impact cylinder 301 for impacting the heavy hammer 201 to make it swing around the rotating shaft in a vertical plane, a clutch 302 and a hydraulic motor 303 connected to one end of the rotating shaft 202, and a brake 304 connected to the other end of the rotating shaft 202.

[0031] The impact cylinder 301 is fixed to the upper part of the top bracket 501, and a cylinder support plate 507 is provided at the rear end of the upper part of the top bracket 501. The impact cylinder 301 is fixed to the cylinder support plate 507. The output end of the impact cylinder 301 passes through the cylinder support plate 507 and is connected to the top block 305. The top block 305 is slidably arranged on the linear guide rail 506 and aligned with the weight 201. When the impact cylinder 301 is working, it drives the top block 305 to slide along the linear guide rail 506 to give the weight 201 a large initial velocity and a large acceleration, so that the weight 201 swings around the rotating shaft 202.

[0032] The clutch 302 and the brake 304 are respectively arranged on both sides of the top bracket 501. A motor seat 505 is also arranged on one side of the top bracket 501. The clutch 302 is arranged between the motor seat 505 and the top bracket 501. The hydraulic motor 303 is fixed on the motor seat 505. The brake 304 is fixed on the other side of the top bracket 501 and connected to the rotating shaft 202. The hydraulic motor 505 is connected to the rotating shaft 202 through the clutch 302, and the brake 304 is directly connected to the rotating shaft 202. The clutch 302 is separated when the weight 201 swings downward and is locked when the weight 201 is lifted upward. Preferably, the clutch 302 is a tooth clutch.

[0033] Please refer to Figure 1 and 5 The anvil plate 4 is arranged at the lowest point of the swing trajectory of the weight 201. The function of the anvil plate 4 is to receive the impact of the weight 201 to generate acceleration transverse waves. The brake 304 locks the rotating shaft 202 after the weight 201 hits the anvil plate 4 to avoid secondary impact and reduce interference with the acceleration transverse wave.

[0034] The position of the anvil 4 can be adjusted to better cooperate with the weight 201 to generate SH waves. The anvil 4 is movably arranged on the mobile body 1 and can be raised and lowered in the vertical direction. Here, the anvil 4 is fixed to the frame 5 by a fixing plate 401, and the anvil 4 is arranged below the fixing plate 401. The anvil 4 is provided with a plurality of constraint shafts 403 extending vertically upward, and the fixing plate 401 is provided with a plurality of constraint holes, and the constraint holes correspond to the constraint shafts 403 one by one. Each constraint shaft 403 is inserted into a constraint hole and can move up and down. The fixing plate 401 is also provided with a vertically arranged hydraulic cylinder 402, and the output end of the hydraulic cylinder 402 is connected to the anvil 4.

[0035] The output end of the hydraulic cylinder 402 is lifted and lowered to drive the anvil 4 to lift and lower, and adjust the position of the anvil 4. In addition, spikes 404 can be set at the bottom of the anvil 4, and the spikes 404 can be embedded in the ground during actual work to increase the coupling degree with the ground and better generate SH waves.

[0036] The working process of the above-mentioned pendulum impact source excitation device based on SH wave is as follows: at the initial moment, the clutch 302 is locked, the hydraulic motor 303 drives the rotating shaft 202 to rotate so that the weight 201 is lifted to a high place, and the impact cylinder 301 drives the top block 305 to slide along the linear guide rail 506 until the top block 305 hits the weight 201, and the weight 201 obtains speed and acceleration and swings downward. At this time, the clutch 302 is in a separated state, and after the weight 201 hits the anvil 4, the brake 304 stops the movement of the weight 201 by locking the rotating shaft 202, and the weight 201 hits the anvil 4 to generate SH waves.

[0037] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0038] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pendulum impact source excitation device based on SH waves, characterized in that: It includes a mobile body and a striking module, a driving module and a cutting board mounted on the mobile body; The striking module comprises a heavy hammer with a rotating shaft at the end; The driving module includes an impact cylinder for impacting the weight to make it swing around the rotating shaft in a vertical plane, a clutch and a hydraulic motor connected to one end of the rotating shaft, and a brake connected to the other end of the rotating shaft; The anvil is arranged at the lowest point of the swing track of the weight to receive the impact of the weight to generate acceleration transverse waves, and the brake locks the rotating shaft after the weight hits the anvil; The knocking module and the driving module are installed on the mobile vehicle body through a top bracket, the top bracket is a right-angle trough structure, the upper part of which is provided with a horizontally arranged linear guide rail, and the lower part is passed through by the rotating shaft, the impact cylinder is fixed to the upper part of the top bracket and its output end is connected to the top block, and the top block is slidably arranged on the linear guide rail and aligned with the heavy hammer; A motor seat is also provided on one side of the top bracket, the clutch is provided between the motor seat and the top bracket, the hydraulic motor is fixed on the motor seat, the brake is fixed on the other side of the top bracket and connected to the rotating shaft, the clutch is respectively connected to the rotating shaft and the hydraulic motor, the clutch is separated when the weight swings downward and locked when the weight is lifted upward; The cutting board is movably arranged on the movable vehicle body and can be lifted and lowered along the vertical direction.

2. The SH wave-based pendulum impact source excitation device according to claim 1, characterized in that: The anvil is fixed to the mobile vehicle body via a fixing plate, the anvil is disposed below the fixing plate, a plurality of constraint shafts extending vertically upward are provided on the anvil, a plurality of constraint holes are provided on the fixing plate, the constraint holes correspond one to one with the constraint shafts, each constraint shaft is inserted into a constraint hole and can move up and down, a vertically arranged hydraulic cylinder is also provided on the fixing plate, and an output end of the hydraulic cylinder is connected to the anvil.

3. The SH wave-based pendulum impact source excitation device according to claim 1, characterized in that: The bottom of the cutting board is provided with nail teeth.

4. The SH wave-based pendulum impact source excitation device according to claim 1, characterized in that: The clutch is a dog clutch.

5. The SH wave-based pendulum impact source excitation device according to claim 1, characterized in that: The movable vehicle body is a tracked vehicle.

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