Electromagnetic emission equipment applied to artificial source electromagnetic method

Abstract

The utility model discloses electromagnetic emission equipment applied to an artificial source electromagnetic method, which comprises a dummy load device, the dummy load device comprises an upper opening box body, a binding post group and a load device formed by connecting five resistors in series, and the load device is arranged in the upper opening box body and is connected with a generator set through the binding post group; the binding post group comprises a total binding post, a large-current emission gear binding post and a small-current emission gear binding post. The dummy load device is used for replacing no-load operation, that is, the dummy load device simulates an actual load during the power-off period of the electromagnetic transmitter, so that the load fluctuation amplitude is reduced, the stability of the generator is kept, and smooth operation of the generator set is guaranteed; the connection mode can be adjusted according to the electrical resistivity of coupling of the electromagnetic transmitter and the ground so as to adapt to actual load simulation requirements during transmission of different currents.

Description

Technical Field

[0001] The utility model relates to the technical field of geophysical exploration, in particular to an electromagnetic emission device applied to an artificial source electromagnetic method. Background Art

[0002] Artificial source electromagnetic method is a geophysical exploration technology that detects underground or seabed geological structures by artificially generating electromagnetic fields on the ground or in other water bodies. This method involves arranging electromagnetic transmitters on the ground. When electromagnetic waves encounter geological bodies with different electrical properties, their speed and direction will change. The receiving device can capture these changes and reconstruct the underground structure based on them.

[0003] When operating, electromagnetic transmitters send strong current pulses to the ground, and the high-voltage DC power supply used by such high-power transmitters is usually provided by large-capacity generator sets. This power supply system needs to respond quickly to instantaneous changes in power supply. Once the electromagnetic transmitter is powered off, the power will disappear in a short time, and the generator set will face a no-load condition, which may cause the generator to experience the so-called "flying car" phenomenon, which will damage the normal operation of the generator. Summary of the invention

[0004] To solve the above technical problems, the utility model provides an electromagnetic emission device applied to artificial source electromagnetic method. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0005] The utility model adopts the following technical solutions:

[0006] Provided is an electromagnetic transmitting device applied to an artificial source electromagnetic method, comprising: a dummy load device, an electromagnetic transmitter, and a generator set for providing power to the electromagnetic transmitter;

[0007] The dummy load device comprises: an upper opening box, a terminal group, and a load device consisting of five resistors connected in series, wherein the load device is arranged inside the upper opening box and connected to the generator set through the terminal group;

[0008] The terminal group includes: a main terminal, a large current emission gear terminal and a small current emission gear terminal; a wire is led out from one end of the load device and connected to the main terminal, and a wire is led out from the other end and connected to the large current emission gear terminal, and a wire is led out from a position point between two adjacent resistors in the load device and connected to the small current emission gear terminal.

[0009] Furthermore, the terminal group is arranged on the front wall of the upper opening box; the positive pole of the generator set is connected to the main terminal, and the negative pole of the generator set is connected to the large current transmission gear terminal or the small current transmission gear terminal.

[0010] Furthermore, five support rods with uniform intervals are arranged in parallel in the upper open box, and the support rods are spaced a certain distance from the bottom wall of the upper open box, and one resistor is arranged on each support rod.

[0011] Furthermore, two groups of heat dissipation grooves are provided on the two side walls of the upper opening box body, and each group of heat dissipation grooves is composed of a number of long hollow grooves evenly spaced apart; outwardly protruding baffle strips are also provided on the two side walls of the upper opening box body, and ventilation grooves are provided at the bottom of the baffle strips.

[0012] Furthermore, the tops of the front box wall and the rear box wall of the upper opening box body are bent and extended in directions away from each other to form a hanging platform, and a plurality of mounting holes are provided on the hanging platform.

[0013] Furthermore, the size of the upper opening box is 70cm×40cm×25cm.

[0014] Furthermore, the electromagnetic transmitting equipment applied to the artificial source electromagnetic method also includes: a heat dissipation device, which is arranged inside the upper opening box and is located below the load device; the heat dissipation device includes: a rectangular frame and a cooling fan arranged on the rectangular frame, and the rectangular frame is arranged on both side walls of the upper opening box at positions corresponding to the baffle strips.

[0015] Beneficial effects brought by the utility model:

[0016] 1. Use a dummy load device to replace no-load operation, that is, use the dummy load device to simulate the actual load during the power failure of the electromagnetic transmitter, so as to reduce the load fluctuation amplitude, thereby maintaining the stability of the generator and ensuring the smooth operation of the generator set;

[0017] 2. The dummy load device consists of an upper opening box, a terminal group and a load device. It has a simple structure and is easy to operate, install and maintain at any time.

[0018] 3. Through the setting of the main terminal, the large current transmission gear terminal and the small current transmission gear terminal, the connection method can be adjusted according to the resistivity of the coupling between the electromagnetic transmitter and the earth to adapt to the actual load simulation requirements during different current transmissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of an electromagnetic transmitting device applied to the artificial source electromagnetic method of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the dummy load device of the utility model;

[0022] Figure 3 This is a connection diagram of the load device of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the heat dissipation device of the utility model. DETAILED DESCRIPTION

[0024] The following is a detailed description of the embodiments of the utility model in conjunction with the accompanying drawings. It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-4 As shown, in some illustrative embodiments, an electromagnetic transmitting device applied to an artificial source electromagnetic method is provided, comprising: an electromagnetic transmitter 1, a generator set 2 for providing power to the electromagnetic transmitter 1, and a dummy load device 3 for simulating an actual load.

[0026] In geological surveys, electromagnetic transmitters 1 are usually used in artificial source electromagnetic detection technology, which detects the structure and properties of underground materials by emitting electromagnetic waves. Electromagnetic detection is a non-destructive detection method.

[0027] It infers the underground geological structure based on the changes in the speed and path of electromagnetic waves when they propagate in the underground medium. The electromagnetic transmitter 1 inverts the DC power provided by the generator set 2 into the AC power of the required waveform and sends it out through the transmitting coil, samples the current signal through the A / D and controls the peripheral circuit to record, store and display the waveform. The dummy load device 3 can provide a stable load for the generator set 2 when the electromagnetic transmitter 1 stops working, avoid the generator from running at no load, reduce the runaway phenomenon, and protect the normal operation of the generator set.

[0028] The dummy load device 3 includes: an upper open box 4, a terminal group and a load device 5 composed of five resistors connected in series, wherein the terminal group is arranged on the front box wall 401 of the upper open box 4, and the load device 5 is arranged inside the upper open box 4.

[0029] The upper open box 4 is specifically a rectangular shell structure with an upper opening, which serves as the outer shell of the dummy load device and is designed as an open box to facilitate the installation, maintenance or replacement of the load device 5 inside.

[0030] The size of the upper opening box 4 is 70cm×40cm×25cm. This size design can provide a balanced solution for the dummy load device, that is, the size can provide sufficient space for internal components while maintaining a moderate overall size, which is convenient to carry and operate, and easy to carry manually. This is an important consideration for field testing.

[0031] The load device 5 is the core part of the dummy load device 3, and is composed of five resistors connected in series, which are respectively denoted as resistor R1, resistor R2, resistor R3, resistor R4, and resistor R5. The resistors R1-R5 are connected in series to form a series circuit. The series circuit has three electrical connection points, such as Figure 2 As shown, they are respectively the two end positions of the load device 5 and the position point between the resistor R3 and the resistor R4.

[0032] The terminal group includes: a main terminal 6, a large current transmission gear terminal 7 and a small current transmission gear terminal 8. The two end positions of the load device 5 are respectively connected to the main terminal 6 and the large current transmission gear terminal 7, that is, one end of the load device 5 leads out a wire connected to the main terminal 6, and the other end leads out a wire connected to the large current transmission gear terminal 7. The position point between two adjacent resistors in the load device 5 is selected to lead out a wire connected to the small current transmission gear terminal 8, that is, the position point between the resistor R3 and the resistor R4 is used as the electrical connection point connected to the small current gear output terminal terminal 8.

[0033] The load device 5 is connected to the generator set 2 through a terminal group, specifically, it is connected to the output end of the generator set 2 through a high temperature and high pressure resistant cable. When connected, the positive pole of the generator set 2 is connected to the main terminal 6, and the negative pole of the generator set 2 is connected to the large current transmission gear terminal 7 or the small current transmission gear terminal 8. Specifically, the connection method can be adjusted according to the resistivity of the coupling between the electric transmission system and the earth: Under normal circumstances, when large current is transmitted (above 20A), five resistors are connected, that is, the negative pole of the generator set 2 is connected to the large current transmission gear terminal 7; when small current is transmitted (10A), three resistors are connected, that is, the negative pole of the generator set 2 is connected to the small current transmission gear terminal 8.

[0034] By selecting a position point between two adjacent resistors in the load device and leading out a wire to connect to the small current emission gear terminal 8, flexible adjustment of the load is achieved to meet the actual load simulation requirements during different current emissions, which has the advantages of strong adaptability and flexible adjustment.

[0035] Five support rods 9 are arranged in parallel in the upper opening box 4 at even intervals, and the support rods 9 are spaced a certain distance from the bottom wall of the upper opening box 4, and a resistor is arranged on each support rod 9. The arrangement of the support rods 9 increases the structural stability of the box, especially in the upper opening design, the support rods 9 can effectively disperse and bear the internal pressure or external load, and prevent the box from being deformed or damaged. In the above structural design, by distributing the resistors on multiple support rods 9, the heat source can be effectively dispersed, local overheating can be avoided, and the heat dissipation efficiency can be improved.

[0036] Two groups of heat dissipation slots are provided on both sides of the upper opening box 4, and each group of heat dissipation slots is composed of a number of long hollow slots 4021 evenly spaced. By providing multiple groups of heat dissipation slots on the box wall, the temperature inside and outside the box can be balanced, local overheating can be avoided, and the overall working stability of the equipment can be improved. The design of the hollow slot is conducive to air circulation, which helps to discharge heat, and also helps to let in fresh air, further optimizing the heat dissipation effect.

[0037] The box walls 402 on both sides of the upper opening box 4 are also provided with baffle strips 4022 protruding outwards, and ventilation slots 4023 are provided at the bottom of the baffle strips 4022. The baffle strips 4022 protruding outwards can provide additional protection to prevent external objects (such as dust, moisture, small animals, etc.) from entering the box, thereby protecting the safety of the internal equipment. The ventilation slots 4023 provided at the bottom of the baffle strips 4022 can realize ventilation inside the box, help dissipate heat and maintain the internal air quality, and prevent moisture or odor problems caused by long-term closure.

[0038] The tops of the front side box wall 401 and the rear side box wall 403 of the upper open box body are bent and extended in a direction away from each other to form a hanging platform 4031, and a plurality of mounting holes 4032 are provided on the hanging platform 4031. The design of the hanging platform 4031 can create additional space, which is convenient for fixing the dummy load device 3 on other structures. The position and number of the mounting holes 4032 can be designed according to the installation requirements of the equipment, and can flexibly adapt to the installation of equipment of different types and sizes.

[0039] The electromagnetic transmitting device applied to the artificial source electromagnetic method of the present application also includes: a heat dissipation device,

[0040] The heat dissipation device is arranged inside the upper opening box 4 and below the load device 5. The heat dissipation device comprises: a rectangular parallelepiped frame 10 and a heat dissipation fan 11 arranged on the rectangular parallelepiped frame 10. The rectangular parallelepiped frame 10 is arranged at the positions of the two side walls 402 of the upper opening box corresponding to the baffle strips 4022.

[0041] Placing it inside the box, especially below the load device 5, can maximize the use of space without affecting the layout of other components outside the box. The heat dissipation device is correspondingly arranged at the position of the baffle strip 4022, which can promote air flow, improve the heat dissipation efficiency, ensure that the load device works at a suitable temperature, and avoid performance degradation or damage caused by overheating.

[0042] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An electromagnetic transmitting device used in artificial source electromagnetic method, characterized in that: include: A dummy load device, an electromagnetic transmitter, and a generator set for providing power to the electromagnetic transmitter; The dummy load device comprises: an upper opening box, a terminal group, and a load device consisting of five resistors connected in series, wherein the load device is arranged inside the upper opening box and connected to the generator set through the terminal group; The terminal group includes: a main terminal, a large current emission gear terminal and a small current emission gear terminal; a wire is led out from one end of the load device and connected to the main terminal, and a wire is led out from the other end and connected to the large current emission gear terminal, and a wire is led out from a position point between two adjacent resistors in the load device and connected to the small current emission gear terminal.

2. The electromagnetic transmitting device used in artificial source electromagnetic method according to claim 1, characterized in that: The terminal group is arranged on the front wall of the upper opening box; the positive pole of the generator set is connected to the main terminal, and the negative pole of the generator set is connected to the large current transmission gear terminal or the small current transmission gear terminal.

3. The electromagnetic transmitting device used in artificial source electromagnetic method according to claim 2, characterized in that: Five support rods with uniform intervals are arranged in parallel in the upper open box, and the support rods are spaced a certain distance from the inner bottom wall of the upper open box, and one resistor is arranged on each support rod.

4. The electromagnetic transmitting device used in artificial source electromagnetic method according to claim 3, characterized in that: Two groups of heat dissipation grooves are provided on the box walls on both sides of the upper opening box body, and each group of heat dissipation grooves is composed of a number of long hollow grooves evenly spaced apart; outwardly protruding baffle strips are also provided on the box walls on both sides of the upper opening box body, and ventilation grooves are provided at the bottom of the baffle strips.

5. The electromagnetic transmitting device used in artificial source electromagnetic method according to claim 4, characterized in that: The tops of the front box wall and the rear box wall of the upper opening box body are bent and extended in directions away from each other to form a hanging platform, and a plurality of mounting holes are provided on the hanging platform.

6. The electromagnetic transmitting device used in artificial source electromagnetic method according to claim 5, characterized in that: The size of the upper opening box is 70cm×40cm×25cm.

7. The electromagnetic transmitting device used in artificial source electromagnetic method according to claim 6, characterized in that: Also includes: A heat dissipation device is arranged inside the upper opening box and below the load device; the heat dissipation device includes: a rectangular frame and a cooling fan arranged on the rectangular frame, and the rectangular frame is arranged on the two side walls of the upper opening box at positions corresponding to the baffle strips.

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