An artificial seismic exploration source excitation device

Abstract

The invention discloses an artificial seismic exploration source excitation device, which relates to the field of seismic exploration technology, comprising a plurality of annularly distributed and interconnected weight guide tubes, wherein a group of weights are slidably inserted into two opposite weight guide tubes; after being fixed, driving shafts rotatably connected to a trolley are fixed on both sides of the axis of the plurality of weight guide tubes, and a firing mechanism and a weight pressing assembly are also fixed on the frame, wherein the firing mechanism comprises a firing rod that can elastically contract vertically; the weight is magnetically attracted in the weight guide tube by an electromagnetic plate, and the driving shaft is driven to rotate by the output shaft of a servo motor, and the extrusion plate of the weight pressing assembly presses the weight back into the weight guide tube, and the firing rod is elastically contracted by the weight guide tube during rotation, and after the weight rotates to the bottom of the firing rod, the uppermost electromagnetic plate is powered off and demagnetized by the power-off switch of the positioning and falling-off mechanism, and the firing rod fires the weight, thereby solving the problem that the traditional weight lifting link consumes a lot of time and affects the data quality when operating on uneven land.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic exploration, and in particular to an artificial seismic exploration source excitation device. Background Art

[0002] Artificial seismic exploration is a commonly used geophysical exploration method. It uses artificial methods to create "seismic waves" in the field, and then uses arrangement exploration methods to set up detectors at receiving points to receive seismic waves reflected from underground rock formations, thereby observing underground rock structures and structures. Among them, drop hammer seismic exploration is a seismic exploration method that uses a heavy hammer as a source to generate seismic waves, and explores underground geological structures by analyzing the propagation characteristics of these waves in the strata.

[0003] Traditional shallow drop-hammer seismic exploration equipment uses guide columns to guide and support the hammer. During operation, the hammer must be lifted upward along the guide columns. Once raised to a certain height, the falling hammer strikes the ground, generating seismic waves. Therefore, during the secondary ground impact to create the seismic source, the guide columns must remain vertically fixed to guide the hammer's trajectory. This rigid structure necessitates that the hammer be raised along a fixed path each time. In densely surveyed areas (e.g., requiring 30 hammer strikes per measurement point), and in a typical 2D survey project (500 physical points x 30 hammer strikes), the weight lifting process alone consumes a significant amount of time. Furthermore, when operating on uneven ground, the hammer's contact state and energy release vary with each drop, leading to instabilities in seismic wave parameters such as frequency and amplitude, hindering data comparison. Summary of the Invention

[0004] The purpose of the present invention is to propose an artificial seismic exploration source excitation device to solve the problem that the traditional weight lifting link consumes a lot of time and when operating on uneven land, the contact state and energy release of the weight each time it falls are different, resulting in instability of parameters such as seismic wave frequency and amplitude, which affects data comparison.

[0005] To achieve the above-mentioned object, the present invention adopts the following technology: an artificial seismic exploration source excitation device: comprising a cart, and also comprising a plurality of annularly distributed and interconnected weight guide tubes, wherein a group of weights are slidably inserted into two opposing weight guide tubes;

[0006] After being fixed, a plurality of the weight guide tubes are fixed with drive shafts rotatably connected to the trolley on both sides of the axis, and a servo motor is fixed on the frame of the trolley;

[0007] A firing mechanism and a heavy hammer pressing assembly are also fixed on the frame, wherein the firing mechanism includes a firing rod that can be elastically contracted vertically;

[0008] The inner wall of the weight guide tube is embedded with an electromagnetic plate that is magnetically attracted to the weight;

[0009] The heavy hammer is magnetically attracted to the heavy hammer guide tube by the electromagnetic plate, and the drive shaft is driven to rotate by the output shaft of the servo motor. The extrusion plate of the heavy hammer pressing assembly presses the heavy hammer back into the heavy hammer guide tube, and the firing rod is elastically squeezed and contracted by the heavy hammer guide tube during rotation. After the heavy hammer rotates to the bottom of the firing rod, the uppermost electromagnetic plate is powered off and demagnetized by the power-off switch of the positioning and falling mechanism, and the firing rod fires the heavy hammer.

[0010] As a further description of the above-mentioned technology, an artificial seismic exploration source excitation device is provided: a gantry is fixed on the frame, a sleeve is fixed on the lower surface of the crossbeam of the gantry, a firing rod is slidably inserted into the sleeve, and a spring is fixed between the firing rod and the sleeve;

[0011] A relief opening is provided on one side of the weight guide tube;

[0012] The power-off switch includes a contact tube sleeved on one end of the drive shaft. Multiple insulating plates are distributed on the contact tube, each insulating plate corresponding to a weight guide tube. The contact tube is sleeved with an insulating sleeve fixed to the vehicle frame. A contact spring is fixed to the inner wall of the insulating sleeve and is in contact with the contact tube.

[0013] The power-off switch also includes an electric slip ring with a stator fixed on the vehicle frame and a rotor coaxially fixed to the drive shaft. The contact tube is electrically connected to the electromagnetic plate and the rotor, and the stator of the electric slip ring is electrically connected to the contact spring.

[0014] As a further description of the above technology, an artificial seismic exploration source excitation device is provided: a pad is fixed to the lower end of the firing rod, a guide rod parallel to the firing rod is fixed to the pad, a guide tube is sleeved on the guide rod, and the guide tube is fixed to the frame.

[0015] As a further description of the above technology, an artificial seismic exploration source excitation device is as follows: the casing is an external threaded tube, an adjusting nut is threadedly connected to the casing, the spring is sleeved on the casing, and the upper end of the spring is fixed to the adjusting nut.

[0016] As a further description of the artificial seismic exploration source excitation device of the above technology: the opening size of the avoidance is smaller than the outer diameter of the heavy hammer.

[0017] As a further description of the above technology, an artificial seismic exploration source excitation device is as follows: the extrusion plate is an arc-shaped structure coaxial with the driving shaft, and a guide plate is fixed to the lower edge of the extrusion plate, and the guide plate is inclined toward the side away from the heavy hammer.

[0018] As a further description of the above-mentioned technology, an artificial seismic exploration source excitation device: the side of the heavy hammer guide tube away from the avoidance opening is a curved surface structure.

[0019] As a further description of the above technology, an artificial seismic exploration source excitation device is provided: a channel is formed between the two weight guide tubes, and the weight is longer than the length of the channel.

[0020] As a further description of the artificial seismic exploration source excitation device of the above technology: a plurality of rollers are rotatably provided on the lower surface of the pad.

[0021] In summary, due to the use of the above-mentioned technology in an artificial seismic exploration source excitation device, the beneficial effects of the present invention are:

[0022] 1. The present application uses multiple groups of weights that are slidably inserted into multiple cyclically rotating weight guide tubes. When the weight guide tubes rotate, they squeeze the firing rods to generate a force that impacts the weights. When the weights fall freely, the firing rods impact the weights, increasing the impact force of the weights on the ground, thereby shortening the lifting height of the weights. In addition, through the cyclical rotation of the multiple groups of weights to excite the source, the time consumed in the weight lifting link is ultimately shortened.

[0023] 2. The rotation radius of the cyclically rotating hammer guide tube is close to but not in contact with the ground. Therefore, when the ground becomes uneven, the ground can be scraped and leveled by rotating the hammer guide tube, thereby ensuring that the area where the hammer is struck each time can remain relatively flat, solving the problem of unstable seismic wave parameters caused by uneven ground.

[0024] 3. The extrusion plate of the heavy hammer pressing assembly is used to press the heavy hammer that has hit the ground below back into the heavy hammer guide tube. At the same time, the extrusion plate is used to block the heavy hammer from moving outward under the action of centrifugal force when it rotates rapidly. The heavy hammer is positioned through the extrusion and contraction of the extrusion plate, so that the height of the heavy hammer's descent is the same each time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It shows a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0026] Figure 2 It shows a schematic diagram of the overall front structure provided according to an embodiment of the present invention;

[0027] Figure 3 A schematic structural diagram of a heavy hammer pressing assembly according to an embodiment of the present invention is shown;

[0028] Figure 4 A schematic structural diagram of a weight guide tube and a power-off switch provided in an embodiment of the present invention is shown;

[0029] Figure 5 The embodiment of the present invention provides Figure 4 The enlarged structural diagram at B in the middle;

[0030] Figure 6 A schematic diagram of a cross-sectional structure of a weight guide tube according to an embodiment of the present invention is shown;

[0031] Figure 7 A schematic diagram of the structure of a contact spring inside an insulating sleeve according to an embodiment of the present invention is shown;

[0032] Figure 8 The embodiment of the present invention provides Figure 1 A in the middle is an enlarged structural diagram;

[0033] Figure 9 A schematic structural diagram of a firing mechanism provided according to an embodiment of the present invention is shown.

[0034] Legend:

[0035] 10. Cart; 11. Carriage frame; 12. Gantry; 13. Handrail; 20. Hammer guide tube; 21. Drive shaft; 22. Avoidance; 30. Hammer; 40. Servo motor; 50. Trigger mechanism; 51. Sleeve; 511. Pressure relief hole; 52. Trigger rod; 53. Spring; 54. Adjusting nut; 55. Pad; 551. Roller; 56. Conduit; 57. Guide rod; 60. Hammer pressing assembly; 61 , extrusion plate; 62, guide plate; 70, positioning and falling mechanism; 71, electric slip ring; 72, contact tube; 721, first insulating plate; 722, second insulating plate; 723, third insulating plate; 73, insulating sleeve; 731, first contact spring; 732, second contact spring; 733, third contact spring; 74, first electromagnetic plate; 75, second electromagnetic plate; 76, third electromagnetic plate; 77, control switch. DETAILED DESCRIPTION

[0036] The following will provide a clear and complete description of the technology in the embodiments of the present invention, an artificial seismic exploration source excitation device, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] like Figure 1 - Figure 9 As shown, the present invention provides: an artificial seismic exploration source excitation device, including a cart 10, and also including a plurality of annularly distributed and interconnected weight guide tubes 20, a group of weights 30 slidingly inserted into two opposing weight guide tubes 20, and the weights 30 sliding inside are guided by the two opposing and interconnected weight guide tubes 20;

[0038] A driving shaft 21 rotatably connected to the trolley 10 is fixed on both sides of the axis of the multiple hammer guide tubes 20, and the multiple hammer guide tubes 20 are distributed in a ring with the driving shaft 21 as the axis. Then, the driving shaft 21 drives the hammer guide tube 20 to rotate, thereby driving the hammer 30 in the hammer guide tube 20 to rotate accordingly, and the servo motor 40 fixed on the frame 11 of the trolley 10 drives the driving shaft 21 through the output shaft of the servo motor 40 to achieve high-precision fixed-angle rotation (such as Figure 1 、 Figure 4 shown);

[0039] By fixing the weight pressing assembly 60 on the frame 11, the weight 30 in the weight guide tube 20 is prevented from moving outward due to centrifugal force during rotation, and the weight 30 is pressed back into the weight guide tube 20 to ensure that the height of the weight 30 is the same each time it lands.

[0040] At the same time, when the weight 30 and the falling height remain unchanged, the trigger rod 52 of the trigger mechanism 50 fixed on the frame 11 elastically contracts to generate an elastic rebound force to trigger the freely falling weight 30, thereby increasing the impact force of the weight 30 on the ground when it falls;

[0041] In order to pick up the weight 30 after it falls and hits the ground, an electromagnetic plate is embedded in the inner wall of the weight guide tube 20 and is magnetically attracted to the weight 30. The electromagnetic plate magnetically attracts the weight 30 and fixes the weight 30 in the weight guide tube 20. When the electromagnetic plate is powered off and loses its magnetism, the weight 30 can slide down the weight guide tube 20.

[0042] The weight 30 is magnetically attracted to the weight guide tube 20 by the electromagnetic plate, and the drive shaft 21 is driven to rotate by the output shaft of the servo motor 40. The extrusion plate 61 of the weight pressing assembly 60 presses the weight 30 that has hit the ground below back into the weight guide tube 20. The shielding of the extrusion plate 61 also prevents the weight 30 from moving outward under the action of centrifugal force when it rotates rapidly. In the process of multiple weight guide tubes 20 rotating with the drive shaft 21 as the axis, the firing rod 52 is elastically squeezed and contracted by the outer wall of the weight guide tube 20 during rotation. After the weight 30 rotates to the bottom of the firing rod 52, the weight 30 The electromagnetic plate is in a vertical state, and at the same time, the electromagnetic plate at that location is de-energized and demagnetized by the power-off switch of the positioning and falling mechanism 70, and the weight 30 falls freely along the two weight guide tubes 20 in the vertical state. At the same time, the elastic potential energy of the firing rod 52 is converted into kinetic energy of the weight 30, thereby firing the weight 30 through the firing rod 52, thereby increasing the impact force of the weight 30 on the ground. With the cooperation of the firing rod 52, the kinetic energy of the weight 30 is increased, and the lifting height of the weight 30 is shortened. In addition, through the rotation cycle of multiple groups of weights 30, the vibration source excitation, the time consumed in the lifting link of the weight 30 is finally shortened.

[0043] At the same time, the rotation radius of the circulating hammer guide tube 20 is close to but does not touch the ground. Therefore, when the ground becomes uneven, the ground can be scraped and leveled by the rotation of the hammer guide tube 20, thereby ensuring that the area where the hammer 30 is fired each time can maintain a relatively flat state, reducing the problem of unstable seismic wave parameters caused by uneven ground.

[0044] like Figure 2 、 Figure 9 As shown, a gantry 12 is fixed on the vehicle frame 11, and a vertically arranged sleeve 51 with multiple pressure relief holes 511 on the top is fixed on the lower surface of the crossbeam of the gantry 12. A firing rod 52 is vertically slidably inserted into the sleeve 51, and a spring 53 is fixed between the firing rod 52 and the sleeve 51. The firing rod 52 is guided by the sleeve 51 so that the firing rod 52 can be vertically extended and retracted. When the firing rod 52 is squeezed into the sleeve 51 by the weight guide tube 20 and retracted, the spring 53 is elastically compressed to generate an elastic rebound force. When the firing rod 52 is separated from the weight guide tube 20, the spring 53 elastically rebounds to fire the weight 30 in the weight guide tube 20.

[0045] like Figure 4 As shown, a relief opening 22 is provided on the side of the weight guide tube 20 away from the side where the firing rod 52 is pressed. The opening diameter of the relief opening 22 is larger than the size of the firing rod 52, the spring 53, and the sleeve 51. Therefore, when the firing rod 52 elastically rebounds due to the spring 53 to fire the weight 30, a portion of the firing rod 52 is inserted into the interior of the weight guide tube 20. Under the action of the relief opening 22, the rotating weight guide tube 20 can avoid the firing rod 52, the spring 53, and the sleeve 51 from getting stuck in the weight guide tube 20.

[0046] like Figure 5 、 Figure 7 As shown, the power-off switch includes a contact tube 72 sleeved on one end of the drive shaft 21. The surface of the drive shaft 21 is coated with a rubber insulating layer. The contact tube 72 sleeves on the insulating layer of the drive shaft 21. A plurality of insulating plates are distributed on the contact tube 72. In this embodiment, two first insulating plates 721, two second insulating plates 722, and two third insulating plates 723 are symmetrically attached to the outer wall of the contact tube 72. Each of the first insulating plates 721, the second insulating plates 722, and the third insulating plates 723 corresponds to a weight guide tube 20, and the first insulating plates 721, the second insulating plates 722, and the third insulating plates 723 are spaced apart.

[0047] In this embodiment, the contact tube 72 is sleeved with an insulating sleeve 73 fixed to the vehicle frame 11. A first contact spring 731, a second contact spring 732, and a third contact spring 733 are fixed to the inner wall of the insulating sleeve 73 and are symmetrically arranged in contact with the contact tube 72. The first contact spring 731 is located on the first insulating plate 721, the second contact spring 732 is located on the second insulating plate 722, and the third contact spring 733 is located on the third insulating plate 723.

[0048] When the contact spring contacts the contact tube 72, the electromagnetic plate and the battery are in a loop magnetization state. When the drive shaft 21 drives the contact spring and the insulating plate on the surface to rotate, and when the two weight guide tubes 20 are in a vertical state, the insulating plate rotates to the position of the contact spring, the electromagnetic plate is powered off and demagnetized, and the weight 30 can fall freely from the weight guide tube 20. After the contact spring separates from the insulating plate and then makes electrical contact with the contact tube 72, the electromagnetic plate is powered on and magnetized, and then the weight 30 is magnetically attracted.

[0049] It is worth noting that in order to prevent rainwater from entering through the opening of the insulating sleeve 73 and causing a short circuit, sealing rings are embedded at both ends of the insulating sleeve 73 to fit tightly against the drive shaft 21;

[0050] like Figure 5 As shown, in order to ensure that the rotating electromagnetic plate can be energized and avoid the problem of torsional fracture of the wire connection, the power switch also includes an electric slip ring 71 with a stator fixed to the frame 11 and a rotor coaxially fixed to the drive shaft 21. The contact tube 72 is electrically connected to the electromagnetic plate and the rotor. The stator of the electric slip ring 71 is electrically connected to the contact spring. The rotating electromagnetic plate is electrically connected to the battery through the electric slip ring 71.

[0051] like Figure 9 As shown, a pad 55 is fixed to the lower end of the firing rod 52, and a guide rod 57 parallel to the firing rod 52 is fixed to the upper surface of the pad 55. A guide tube 56 is sleeved on the guide rod 57. The guide tube 56 is fixed to the frame 11 and parallel to the sleeve 51. Then, the guide rod 57 and the guide tube 56 cooperate to improve the torsional strength of the firing rod 52, thereby avoiding the problem of bending of the firing rod 52 during the process of being squeezed and contracted by the heavy hammer guide tube 20.

[0052] like Figure 9 As shown, the sleeve 51 is an external threaded tube, and an adjusting nut 54 is threadedly connected to the sleeve 51. The spring 53 is sleeved on the sleeve 51, and the upper end of the spring 53 is fixed to the adjusting nut 54. By adjusting the thread of the adjusting nut 54 on the sleeve 51, the height of the lower end of the firing rod 52 is adjusted, and the compression stroke of the spring 53 when compressed is changed, so that the firing strength of the firing rod 52 on the hammer 30 can be adjusted.

[0053] like Figure 5As shown, the avoidance opening 22 satisfies the passage of the firing mechanism 50 while the opening size of the avoidance opening 22 is smaller than the outer diameter of the weight 30. Thus, when the weight guide tube 20 rotates counterclockwise and the avoidance opening 22 is opened toward the side, the weight 30 is prevented from falling from the avoidance opening 22 opened on one side of the weight guide tube 20.

[0054] like Figure 2 、 Figure 3 As shown, the extrusion plate 61 is an arc-shaped structure coaxial with the drive shaft 21, and a guide plate 62 is fixed to the lower edge of the extrusion plate 61. At the same time, the guide plate 62 is inclined to the side away from the weight 30. Therefore, when the weight 30 falls and hits the soft ground, the weight 30 will partially protrude from the weight guide tube 20. At this time, the protruding part is gradually retracted into the weight guide tube 20 after being squeezed by the slope of the guide plate 62. At the same time, when it reaches the position of the extrusion plate 61, the weight 30 is squeezed and contracted by the extrusion plate 61 to complete the positioning, so that the height of the weight 30 is the same each time it descends. At the same time, the extrusion plate 61 blocks the open end of the weight guide tube 20. When the weight 30 rotates, it can be prevented from moving outward due to centrifugal force by the shielding of the extrusion plate 61.

[0055] like Figure 4 As shown, the side of the weight guide tube 20 away from the avoidance opening 22 is an arc surface structure. When the weight guide tube 20 rotates counterclockwise, the arc slope of the weight guide tube 20 gradually changes the direction of movement through a smooth curve, avoiding a sudden increase in local pressure on the firing rod 52, and making the resistance distribution during the squeezing and contraction of the firing rod 52 more uniform.

[0056] like Figure 6 As shown, when the weight 30 falls freely and is fired by the firing rod 52, the weight 30 is larger than the length of the channel formed between the two relative weight guide tubes 20. Therefore, during the falling process of the weight 30, the upper end of the weight 30 is partially placed inside the upper weight guide tube 20, and the lower end is partially placed inside the lower weight guide tube 20. Furthermore, during the falling process of the weight 30, the weight 30 is guided by the weight guide tubes 20 at both ends to prevent the lower end of the weight 30 from hitting the channel opening at the connection between the two weight guide tubes 20.

[0057] like Figure 9 As shown, a plurality of rollers 551 are rotatably provided on the lower surface of the pad 55 , thereby reducing the friction force when the pad 55 contacts the weight guide tube 20 .

[0058] Working Principle: In this embodiment, six weight guide tubes 20 are provided, two opposing weight guide tubes 20 form a group, and three groups of weights 30 are provided. The inner walls of the three groups are symmetrically fixed with a first electromagnetic plate 74, a second electromagnetic plate 75, and a third electromagnetic plate 76.

[0059] by Figure 4For example, the trolley 10 is pushed to the measuring point position by the handrail 13 on the frame 11, and the start and stop of the servo motor 40 is controlled by the control switch 77. Then, the output shaft of the servo motor 40 drives the drive shaft 21 to rotate counterclockwise. The arc slope of the counterclockwise rotating weight guide tube 20 presses the firing rod 52 upward, and causes the spring 53 to be elastically compressed. The contact spring and the contact tube 72 are electrically contacted and the electromagnetic plate is energized and magnetized. When the weight guide tube 20 with the first electromagnetic plate 74 rotates to a vertical state, the edge of the pad 55 is tangent to the inner wall of the weight guide tube 20, and at the same time, the first insulating plate 721 rotates to the bottom of the first contact spring 731.

[0060] Then the first electromagnetic plate 74 is powered off and demagnetized, and the vertical weight 30 falls freely. At the same time, the pad 55 at the lower end of the firing rod 52 does not contact the weight guide tube 20. The compressed spring 53 elastically rebounds, and the weight 30 is impacted downward through the firing rod 52, completing the source excitation action. Then the servo motor 40 drives the drive shaft 21 to continue rotating. After the first contact spring 731 contacts the contact tube 72, the weight 30 is magnetically attracted to the first electromagnetic plate 74 on the inner wall of the lower weight guide tube 20, and rotates to the position of the guide plate 62 and the extrusion plate 61, squeezing the protruding part into the weight guide tube 20.

[0061] Then, when the next weight guide tube 20 with the second electromagnetic plate 75 is rotated to a vertical state, the second contact spring 732 is placed on the second insulating plate 722, the second electromagnetic plate 75 is de-energized and demagnetized, the weight 30 falls freely and passes through the firing rod 52 to be fired, and after the second contact spring 732 contacts the contact tube 72, the second electromagnetic plate 75 is energized and magnetized;

[0062] Finally, the weight guide tube 20 with the third electromagnetic plate 76 is rotated to a vertical position, and the third contact spring 733 is placed on the third insulating plate 723. At this time, the third electromagnetic plate 76 is de-energized and demagnetized, and the weight 30 falls freely through the firing rod 52 to be fired. After the third contact spring 733 contacts the contact tube 72, the third electromagnetic plate 76 is energized and magnetized.

[0063] Finally, the above-mentioned actions are repeated to complete the source excitation of three sets of heavy hammers 30 cycles.

[0064] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes to an artificial seismic exploration source excitation device and its inventive concept according to the technology of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. An artificial seismic exploration source excitation device, comprising a cart (10), characterized in that: It also includes a plurality of weight guide tubes (20) distributed in an annular manner and communicating with each other, and a group of weights (30) are slidably inserted into two opposing weight guide tubes (20); After being fixed, a plurality of the weight guide tubes (20) are fixed with drive shafts (21) rotatably connected to the trolley (10) on both sides of the axis, and a servo motor (40) is fixed on the frame (11) of the trolley (10); A firing mechanism (50) and a heavy hammer pressing assembly (60) are also fixed to the vehicle frame (11), wherein the firing mechanism (50) includes a firing rod (52) that can be elastically contracted vertically. An electromagnetic plate that is magnetically attracted to the weight (30) is embedded in the inner wall of the weight guide tube (20); The heavy hammer (30) is magnetically attracted in the heavy hammer guide tube (20) through the electromagnetic plate, and the drive shaft (21) is driven to rotate by the output shaft of the servo motor (40). The extrusion plate (61) of the heavy hammer pressing assembly (60) presses the heavy hammer (30) back into the heavy hammer guide tube (20), and the firing rod (52) is elastically contracted by the heavy hammer guide tube (20) during rotation. After the heavy hammer (30) rotates to the bottom of the firing rod (52), the uppermost electromagnetic plate is de-energized and demagnetized by the power-off switch of the positioning and falling mechanism (70), and the firing rod (52) fires the heavy hammer (30).

2. The artificial seismic exploration source excitation device according to claim 1, characterized in that: A gantry (12) is fixed on the vehicle frame (11), a sleeve (51) is fixed on the lower surface of the crossbeam of the gantry (12), a firing rod (52) is slidably inserted into the sleeve (51), and a spring (53) is fixed between the firing rod (52) and the sleeve (51); A relief opening (22) is provided on one side of the weight guide tube (20); The power-off switch includes a contact tube (72) sleeved on one end of a drive shaft (21), a plurality of insulating plates distributed on the contact tube (72), each insulating plate corresponding to a heavy hammer guide tube (20), an insulating sleeve (73) fixed on the vehicle frame (11) being sleeved on the contact tube (72), and a contact spring fitted to the contact tube (72) being fixed on the inner wall of the insulating sleeve (73); The power-off switch also includes an electric slip ring (71) whose stator is fixed on the vehicle frame (11) and whose rotor is coaxially fixed with the drive shaft (21); the contact tube (72) is electrically connected to the electromagnetic plate and the rotor; and the stator of the electric slip ring (71) is electrically connected to the contact spring.

3. The artificial seismic exploration source excitation device according to claim 1, characterized in that: A backing plate (55) is fixed to the lower end of the firing rod (52), and a guide rod (57) parallel to the firing rod (52) is fixed to the backing plate (55). A guide tube (56) is sleeved on the guide rod (57), and the guide tube (56) is fixed to the vehicle frame (11).

4. The artificial seismic exploration source excitation device according to claim 2, characterized in that: The sleeve (51) is an externally threaded tube. An adjusting nut (54) is threadedly connected to the sleeve (51). The spring (53) is sleeved on the sleeve (51). The upper end of the spring (53) is fixed to the adjusting nut (54).

5. The artificial seismic exploration source excitation device according to claim 2, characterized in that: The opening size of the avoidance opening (22) is smaller than the outer diameter of the weight (30).

6. The artificial seismic exploration source excitation device according to claim 1, characterized in that: The extrusion plate (61) is an arc-shaped structure coaxial with the drive shaft (21), and a guide plate (62) is fixed to the lower edge of the extrusion plate (61), and the guide plate (62) is inclined toward a side away from the heavy hammer (30).

7. The artificial seismic exploration source excitation device according to claim 2, characterized in that: The side of the heavy hammer guide tube (20) away from the avoidance opening (22) is a curved surface structure.

8. The artificial seismic exploration source excitation device according to claim 1, characterized in that: A channel is formed between the two weight guide tubes (20), and the weight (30) is longer than the length of the channel.

9. The artificial seismic exploration source excitation device according to claim 3, characterized in that: A plurality of rollers (551) are rotatably provided on the lower surface of the pad (55).

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