Electromagnetic emission system for electromagnetic method exploration in well

Abstract

The utility model relates to the field of geophysical exploration, in particular to an electromagnetic emission system for borehole electromagnetic method exploration, which comprises a power supply arranged on the ground; the conductive frame is transversely telescopic; the conductor rod is longitudinally accommodated in the conductive frame, and the top end of the conductor rod is connected to the power supply through a power supply line; and, the conductive frame is configured to: in response to rotation of the conductor bar, extend laterally to self-fix in the well; the lower end of the steel wire rope is connected with the conductive frame, and the top end is wound on a twisted rope support located on the ground. According to the electromagnetic emission system, the problem that a traditional underground electromagnetic emission electrode has no quality guarantee is solved, the working efficiency is improved, the underground electromagnetic emission success rate is improved, the underground drilling condition is fully utilized, quantitative detection is carried out, and a reliable prospecting equipment hardware foundation is provided for a new round of prospecting action in China.

Description

Technical Field

[0001] The utility model relates to the field of geophysical exploration, in particular to an electromagnetic emission system used for electromagnetic exploration in wells. Background Art

[0002] Borehole electromagnetic method is a method of studying electromagnetic induction phenomena in the time domain or frequency domain in a borehole. With the development of electromagnetic exploration, in order to improve the electromagnetic wave emission intensity and underground radiation depth, the electromagnetic emission source is placed in the underground borehole. However, due to the large borehole depth and small aperture, it cannot be manually operated. The transmitting electrode in the well cannot be close to the well wall and cannot be completely fixed on the wellbore wall. This may cause the transmitting electrode to be empty in the well, affecting the electromagnetic emission effect, and thus failing to give full play to the advantages and characteristics of borehole electromagnetic detection. Therefore, a new type of borehole electromagnetic method transmitting device is urgently needed to change the above shortcomings. Utility Model Content

[0003] It is desirable to provide an electromagnetic launch system and method of using the same.

[0004] According to one embodiment, an electromagnetic transmitting system for electromagnetic exploration in a well includes: a power supply, which is arranged on the ground; a conductive frame, which is laterally retractable; a conductor rod, which is longitudinally accommodated in the conductive frame and the top end of which is connected to the power supply via a power supply line; and the conductive frame is configured to: respond to the rotation of the conductor rod, extend laterally to self-fix in the well; a steel wire cable, the lower end of which is connected to the conductive frame and the top end is wound around a rope support located on the ground.

[0005] Further, the conductive frame includes: an upper plate with a first hole in the center; a lower plate with a second hole in the center, the second hole being opposite to the center of the first hole; a left side portion pivotally connected by an upper left portion and a lower left portion, the pivoting portion protruding toward the well wall, wherein the top end of the upper left portion is hinged to the left side of the upper plate, and the bottom end of the lower left portion is hinged to the left side of the lower plate; a right side portion pivotally connected by an upper right portion and a lower right portion, the pivoting portion protruding toward the well wall, wherein the top end of the upper right portion is hinged to the right side of the upper plate, and the bottom end of the lower right portion is hinged to the right side of the lower plate; and also includes a lateral restraint mechanism, which is used to constrain the end distance from the left side portion to the right side portion to be less than the well diameter range, and release the end distance from the left side portion to the right side portion to be equal to the well diameter in response to the rotation of the conductor rod;

[0006] The second hole has an inner spiral; the conductor bar has an outer spiral, and is received in the conductive frame via the first hole and the second hole.

[0007] As a preferred embodiment, the electromagnetic launching system also includes a transmission device arranged on the lower plate, which includes: a ratchet with its center connected to the conductor rod; a pawl coupled to the ratchet, whose end is connected to an annular spring fixed to the lower plate, and whose head end is led out by a first pull rope; and a pulley set for leading out the first pull rope.

[0008] Specifically, the first hole of the upper plate is a through hole; the upper plate is provided with a limiting device for limiting the up and down movement of the conductor rod during the rotation process.

[0009] The upper plate includes a channel extending from the edge to the center, and the limiting device includes a spring steel nail, which is fastened to the conductor rod in the center of the upper plate under the force of a tension spring; the end of the spring steel top is led out from the second pull rope via a pulley.

[0010] Preferably, the power supply line, the first pull rope and the second pull rope are gathered together and wrapped around the steel cable and led out to the ground as a whole.

[0011] Preferably, the electromagnetic transmitting system further comprises a steel frame with a circular ring connected to the upper part of the conductive frame, and the steel wire cable is bundled from the steel frame with a circular ring and then led out to the ground.

[0012] Specifically, the lateral restraint mechanism includes a left restraint portion and a right restraint portion that are symmetrical about the center of the conductor rod; wherein,

[0013] The left side restraining part comprises: a left extension part, whose left end is connected to the left side part pivoting part, and whose right end is configured to be detachably connected to the left end of the left restriction part while being restricted by the left compression spring; a left restriction part, whose right end is connected to the conductor bar, and whose left end is detachably connected to the right end of the left extension part;

[0014] The right side restraining part comprises: a right extension part, whose right end is connected to the right side part pivoting part, and whose left end is configured to be detachably connected to the right end of the right restriction part while being restricted by the right compression spring; a right restriction part, whose left end is connected to the conductor bar, and whose right end is detachably connected to the left end of the right extension part;

[0015] The left limiting portion and the right limiting portion are configured to respond to the rotation of the conductor bar while the connection with the left stretching portion or the right stretching portion fails.

[0016] Specifically, the conductor rod includes an upper half and a lower half; wherein the lower half has an external spiral; the upper half is a stepped structure that is arranged sequentially or gradually, with the upper portion being smaller and the lower portion being larger, and the maximum value of the stepped cross-section is equal to the inner diameter of the first hole.

[0017] Preferably, conductor nails are provided at both side ends of the conductive frame.

[0018] Beneficial effects of the utility model:

[0019] The electromagnetic transmitting system provided by the utility model has changed the difficult problem of the lack of quality assurance of the traditional underground electromagnetic transmitting electrodes, improved the work efficiency, and increased the success rate of underground electromagnetic transmitting, making full use of the underground drilling conditions to carry out quantitative detection, thus improving the reliable hardware foundation of prospecting equipment for the country's new round of prospecting operations.

[0020] According to the electromagnetic transmitting system provided in each embodiment of the utility model, a new well electrode type of a conductor rod combined with a conductive frame is adopted. The conductive frame is driven to extend horizontally by the rotation of the conductor rod to realize the self-fixation of the electrode in the well, so that the electromagnetic detection operation has a better transmitting effect, and the problem of poor power supply effect caused by unstable transmitting electrodes is reduced, which provides a basic guarantee for the quality of original data collected by magnetotelluric data.

[0021] In addition, the ground operation is transmitted to the well device through the pull rope-pulley method, and all the functional ropes are bundled and wrapped in the steel wire cable, which is led out from the only steel frame with a ring to the cable gantry on the ground, realizing low-cost and high-quality ground-well transmission and significantly improving the efficiency of well operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a half-section diagram of the electrode in the well of the electromagnetic launch system;

[0023] Figure 2 Front view of the empty rectangular body in the conductive frame

[0024] Figure 3 It is a front view of the upper disk of the conductive frame;

[0025] Figure 4 It is a front view of the lower disc of the conductive frame;

[0026] Figure 5 The state diagram of the electrode opening in the well of the electromagnetic launch system;

[0027] Figure 6 This is a half-section diagram of the electromagnetic launch system when it is placed underground and not opened;

[0028] Figure 7 A half-section diagram of the electromagnetic launch system in the open state when placed underground;

[0029] Figure 8 A flow chart of the method of using the electromagnetic launch system;

[0030] Markings in the figure: 1-conductive frame, 2-conductor rod, 3-rectangular aluminum bar, 4-L-shaped steel rod, 5-compression spring, 6-hollow rectangular body, 7-spring steel nail, 8-ratchet, 9-annular steel spring, 10-pulley, 11-steel frame with circular ring, 12-conductor nail, 13-pull rope, 14-steel cable.

[0031] The various aspects and features of various embodiments of the present invention are described with reference to the above drawings. The above drawings are merely illustrative and non-restrictive. Without departing from the subject matter of the present invention, the distribution, numbering, or appearance of the various units in the above drawings may be changed, and are not limited to those shown in the drawings of the specification. DETAILED DESCRIPTION

[0032] The utility model is described in detail below in conjunction with the accompanying drawings.

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. The up, down, left and right in the embodiments refer to the positional relationship of the utility model in the use state, and the horizontal and vertical directions refer to the movement directions of the utility model in the use state.

[0034] An electromagnetic transmitting system for electromagnetic exploration in wells is provided. Figure 7-8 As shown, it includes: a power supply, which is arranged on the ground; a conductive frame 1, which is laterally retractable; a conductor rod 2, which is longitudinally accommodated in the conductive frame, and the top end of which is connected to the power supply via a power supply line; and the conductive frame 1 is configured to: respond to the rotation of the conductor rod 2, extend laterally to self-fix in the well; a steel wire cable, the lower end of which is connected to the conductive frame 1, and the top end is wound around a rope bracket located on the ground.

[0035] The new electromagnetic transmitting system develops the electrode from a traditional pestle-shaped structure into a new composite structure of a conductive frame 1 + a conductor rod 2. On the one hand, the conductor rod 2 provides a connection interface with the power supply, and at the same time transmits the electrical signal to the surrounding well wall through the conductive frame; on the other hand, the conductor rod 2 serves as a lateral extension driving component of the conductive frame 1, thereby realizing the self-fixation of the electrode as a whole in the well, providing an effective solution to the pain points of poor electrode fixation in the well and high grounding resistance.

[0036] The conductive frame 1 includes: an upper plate with a first hole in the center; a lower plate with a second hole in the center, the second hole being opposite to the center of the first hole; a left side portion pivotally connected by an upper left portion and a lower left portion, the pivot protruding toward the well wall, wherein the top end of the upper left portion is hinged to the left side of the upper plate, and the bottom end of the lower left portion is hinged to the left side of the lower plate; a right side portion pivotally connected by an upper right portion and a lower right portion, the pivot protruding toward the well wall, wherein the top end of the upper right portion is hinged to the right side of the upper plate, and the bottom end of the lower right portion is hinged to the right side of the lower plate.

[0037] Depend on Figure 1It can be found that the cross-sectional structure of the conductive frame 1 is hexagonal, the upper side of which corresponds to the upper plate, and the lower side of which corresponds to the lower plate. The size of the upper plate and the lower plate can be smaller than the well diameter, and in engineering practice, it is usually designed as a disc structure. The left side corresponds to the two left sides of the hexagon, and the right side does not correspond to the two right sides of the hexagon. The left side and the right side can be plate-shaped or strip-shaped. From the above structure of the conductive frame 1, it can be known that the lateral extension movement of the conductive frame 1 is achieved by the vertical movement of the upper plate or the lower plate leading the left side and the right side to move in reverse, thereby realizing the lateral extension of the conductive frame 1 as a whole.

[0038] In a specific implementation, the upper plate is a circular copper plate, the first hole of which is a circular hole with a diameter of 2.5 cm in the center. The lower plate is a circular copper plate, the second hole of which is an inner spiral circular hole with a diameter of 4.5 cm in the center. The left side and the right side are respectively pivotally connected by two rectangular copper plates with a movable copper shaft.

[0039] The conductor rod 2 includes an upper half and a lower half, wherein the lower half has an external spiral; the upper half is a stepped structure that is arranged sequentially or gradually, with the upper portion being smaller and the lower portion being larger, and the maximum value of the stepped cross section is equal to the inner diameter of the first hole.

[0040] In a specific implementation, pure copper material with good conductivity is selected to process and manufacture a copper rod with a total length of 120 cm, wherein the upper 70 cm length of the copper rod is a cylindrical copper rod with a diameter of 2 cm. In order to limit the downward movement of the upper part of the copper rod during the opening process of the hexagonal frame, the upper part of the copper rod is processed into a stepped copper rod with a cylindrical diameter of 2.0-2.5 cm every 2.5 cm, and the lower 50 cm length is a spiral copper rod with a diameter of 4 cm that matches the second hole.

[0041] It should be noted that it is feasible to set the inner spiral on the upper disk or the lower disk, and it is feasible to set the corresponding spiral part of the conductor rod 2 on the upper part or the lower part. In addition, in a specific embodiment, the rotation of the conductor rod 2 hardly produces vertical movement, and its first rotation realizes the release of the restraint of the lateral restraint mechanism, thereby realizing the first lateral extension of the conductive frame 1; its second rotation is based on the screw transmission through the rotation of the conductor rod 2 to drive the lower disk to move upward or the upper disk to move downward to realize the second lateral extension of the conductive frame 1. Therefore, the setting position and spiral direction of the outer spiral of the conductor rod 2 and the inner spiral of the upper disk or the lower disk are adjustable according to the above-mentioned movement relationship.

[0042] The conductive frame 1 further comprises a lateral restraining mechanism for constraining the end distance from the left side portion to the right side portion to be smaller than the well diameter range, and releasing the end distance from the left side portion to the right side portion to be equal to the well diameter in response to the rotation of the conductor rod.

[0043] The lateral restraint mechanism comprises a left restraint portion and a right restraint portion which are symmetrical about the center of the conductor bar; wherein,

[0044] The left side restraining part comprises: a left extension part, whose left end is connected to the left side part pivoting part, and whose right end is configured to be detachably connected to the left end of the left restriction part while being restricted by the left compression spring 5; a left restriction part, whose right end is connected to the conductor bar, and whose left end is detachably connected to the right end of the left extension part;

[0045] The right side restraining part comprises: a right extension part, whose right end is connected to the right side part pivoting part, and whose left end is configured to be detachably connected to the right end of the right restriction part while being restricted by the right compression spring 5; a right restriction part, whose left end is connected to the conductor bar, and whose right end is detachably connected to the left end of the right extension part;

[0046] The left limiting portion and the right limiting portion are configured to respond to the rotation of the conductor bar 2 while the connection with the left stretching portion or the right stretching portion fails.

[0047] For a specific implementation of the lateral restraint mechanism, see the top view of the cross-sectional view. Figure 2 , two L-shaped steel bars 4 (i.e., left and right limiting parts) are welded to the midpoint of the conductor bar 2. In order to make the left and right extension parts fall off from their limiting parts at the same time when the conductor bar 2 rotates, the welding directions of the L-shaped steel bars 4 should be opposite; two compression springs 5 ​​are used to weld the steel inner hollow rectangular body 6 put on the conductor bar 2 to the left and right pivotal parts of the hexagonal frame, and rectangular holes with a height of 2.5 cm and a width of 1 cm are opened on both sides of the inner hollow rectangular body 6 connecting the springs; two rectangular aluminum bars 3 are connected to the left and right pivotal parts of the hexagonal frame by movable shafts, and a 0.5 cm diameter circular hole is opened at a position 0.5 cm away from the end of each rectangular aluminum bar 3; the spring is compressed by external force, and the two L-shaped steel bars 4 are hooked and placed in the circular holes of the rectangular aluminum bars 3 on both sides, so that the entire hexagonal conductive frame 1 is contracted and fixed. That is, the connection mode between the left and right extensions and the left and right restrictions is complex, on the one hand, the rectangular aluminum strip 3 and the L-shaped steel bar 4 are detachably connected, and at the same time they are restricted by the compression springs 5 ​​on their respective sides. Figure 1 and Figure 5 It can be seen that, through the clockwise rotation of the conductor rod 2, the L-shaped steel rods 4 on both sides are driven to fall off from the ends of the rectangular aluminum bar 3, the compression springs 5 ​​on both sides are released, the extension parts on both sides will lose their constraints at the same time, and the conductive frame 1 will achieve the first lateral expansion.

[0048] In order to further improve the stability of the electrode fixed to the well wall, conductor nails 12 are provided at the ends of the left side and the right side.

[0049] like Figure 3As shown, the upper plate is provided with a limiting device for limiting the up and down movement of the conductor bar during the rotation process. Specifically, the upper plate of the conductive frame 1 includes a channel extending from the edge to the center, and the limiting device includes a spring steel nail 7, which is fastened to the conductor bar 2 at the center of the upper plate under the force of the tension spring; the end of the spring steel top is led out by the pulley (B) 13 after passing through the pulley 10. The limiting effect of the spring steel nail 7 and the stepped structure of the upper part of the conductor bar 2 jointly limit the up and down movement of the conductor bar 2 during the rotation process, ensuring that the rotation of the conductor bar 2 drives the conductive frame 1 to extend again.

[0050] Since the use scenario of the well electrode is in the well rather than on the ground, how to realize the rotation of the conductor rod 2 becomes important and difficult. The innovation of using pulley transmission to transmit the rotation driving force of the conductor rod 2 from the ground to the well can have the advantages of low cost and high reliability. The transmission device of the electromagnetic transmitting system is set on the lower plate of the conductive frame 1, such as Figure 4 As shown, it includes: a ratchet 8 whose center is connected to the conductor rod 2; a pawl coupled to the ratchet 8, whose end is connected to an annular steel spring 9 fixed to the lower plate, and whose head end is led out by a pull rope 13; and a pulley 13 for leading out the pull rope (A) 13.

[0051] The electromagnetic transmitting system also includes a steel wire cable 14 with a length of about 100m, which is used to carry the electrode itself. At the same time, the power supply line, the pull rope (A) 13 and the pull rope (B) 13 can be gathered and wrapped on the steel wire cable 14 to extend to the ground as a whole; and a steel frame 11 with a circular ring made of steel wire with a diameter of 1cm, the steel frame is about 40cm long, and is sleeved on the upper part of the conductive frame 1. The power supply line, the pull rope (B) 13 led out from the upper plate of the conductive frame 1, and the pull rope (A) 13 led out from the lower plate are accommodated in the steel wire cable 14, which are bundled by the steel frame 11 with a circular ring and then led to the ground, providing convenience for the use of the electrode.

[0052] The method of using the electromagnetic launch system is as follows: Figure 6 As shown, including:

[0053] The top of the conductor rod is connected to the power supply through the power supply line, and the electrode is lowered to the specified depth in the well. Figure 7 The device is placed in the underground well by using the steel wire rope 14 to the required depth for the work. It is applicable to the borehole diameter greater than 40 cm and less than 100 cm. The maximum placement depth of the device is 100 meters underground. The length of the cable can be customized according to the required depth of the work.

[0054] After pulling the pull rope (A) 13 for a specified distance and then releasing it, the conductor rod 2 is driven to rotate for the first time; the conductive frame 1 responds to the rotation of the conductive rod 2 and stretches horizontally to fix itself in the well. After placing the launch device at the specified depth of the borehole, the ground will be stretched upward by 5 cm through the pull rope (A) 13, and then the pull rope (A) 13 is released. The transmission process at the lower plate of the conductive frame 1 is as follows: Figure 4 The top view of the cross section is shown as follows: Its initial state is Figure 4 left; Figure 4 The pull rope (A) 13 is pulled, firstly driving the ratchet wheel to rotate counterclockwise, and at the same time the bottom annular steel spring 9 is stretched; then the pull rope (A) 13 is released, as shown in FIG. Figure 4 The right pull rope (A) 13 is retracted, and the ratchet wheel 8 at the bottom of the device rotates clockwise, thereby driving the conductor rod 2 in the middle of the device to rotate clockwise, and then the L-shaped steel rod 4 and the rectangular aluminum bar 3 in the device are automatically separated, and the device is opened due to the elastic force of the compression spring 5, and the conductor nails 12 on both sides are in contact with the well wall. It should be understood that the L-facing ends of the two L-shaped steel rods 4 in opposite directions are related to the desired rotation direction of the conductor rod 2. In this embodiment, Figure 2 and 4 As shown, the ratchet 8 drives the conductor rod 2 to rotate clockwise, while releasing the detachable connection between the L-shaped steel rods 4 and the rectangular aluminum bars 3 on both sides.

[0055] Repeatedly pull the pull rope (A) 13 to drive the conductor rod 2 to rotate again, so that the conductive frame 1 further extends laterally. After the device is opened and stabilized, the ground will be repeatedly stretched and retracted through the pull rope (A) 13, turning the bottom ratchet 8, and then the conductor rod 1 rotates in the clockwise direction. Because the upper part of the conductor rod 2 is stepped, the conductor rod 2 can only slide upwards but not downwards relative to the upper disc (the upper disc can only slide downwards relative to the conductor rod), and the downward direction can only be locked due to the spring steel nail 7. Therefore, while the conductor rod 2 rotates clockwise (screws downward), the lower part of the hexagonal conductive frame 1 gradually opens upward again, so that the conductor nails 12 on both sides of the device are in more stable contact with the well wall until it is completely fixed. Figure 8 .

[0056] When the conductor frame 1 is stretched horizontally for the first time, the ratchet 8 does not rotate, and the upper part of the conductor frame 2 moves freely downward. It should be understood that the ratchet 8 does not need to rotate during the first horizontal stretch; even if the ratchet 8 rotates slightly, it is feasible because the ratchet 8 rotates a certain distance clockwise due to the inherent elasticity of the annular steel spring 9.

[0057] When the conductor frame 1 is extended laterally again, the pulling rope (A) 13 is pulled to drive the conductor rod 2 to rotate based on the elastic force of the annular steel spring 9, and the elastic force recovery effect will bring a slightly larger step distance than the initial state, thereby driving the conductor rod 2 to rotate clockwise. After use, the second pulling rope is pulled to loosen the spring steel nail, so that the conductive frame shrinks laterally. After the power supply work is completed, the upper disk spring steel nail 7 of the device is pulled upward on the ground through the pulling rope (B) 13. After the steel nail shrinks, the conductor rod 2 in the middle of the upper disk of the device will become loose due to unlimited position, and the device and the well wall will loosen accordingly, and finally the device will be recovered.

[0058] The device of the present invention is described above with reference to various embodiments, wherein the embodiments mentioned may include specific features, structures or characteristics, but not every embodiment necessarily includes the specific features, structures or characteristics. In addition, some embodiments may have some or all of the features described for other embodiments or none of the features described for other embodiments.

[0059] As used in the claims, unless otherwise indicated, the use of ordinal adjectives "first," "second," "third," etc. to describe common elements merely indicates that different instances of similar elements are mentioned, and is not intended to imply that the elements so described must be in a given order, whether in time, space, ranking, or any other manner.

[0060] The various features of different embodiments or examples can be combined in a variety of ways with some of the features included and other features excluded to adapt to a variety of different applications. The accompanying drawings and the foregoing description provide examples of embodiments. It will be appreciated by those skilled in the art that one or more of the elements described can be combined into a single functional element. Alternatively, some elements can be divided into multiple functional elements. Elements from one embodiment can be added to another embodiment. The scope of the embodiments is by no means limited by these specific examples. Whether or not clearly provided in the specification, many variations such as differences in product composition and structure are possible.

Claims

1. An electromagnetic transmitting system for electromagnetic exploration in wells, characterized in that: include: A power supply is provided on the ground; A conductive frame, which is laterally retractable; A conductor rod is longitudinally accommodated in the conductive frame, and a top end is connected to the power supply via a power supply line; and the conductive frame is configured to: in response to the rotation of the conductor rod, extend laterally to self-fix in the well; The lower end of the steel wire cable is connected to the conductive frame, and the top end is wound around a twisted rope support located on the ground.

2. The electromagnetic launch system according to claim 1, characterized in that: The conductive frame comprises: an upper plate, the center of which is provided with a first hole; A lower plate, the center of which is provided with a second hole, the second hole being opposite to the center of the first hole; The left side portion is formed by pivoting the left upper portion and the left lower portion, the pivoting portion protruding toward the well wall, wherein the top end of the left upper portion is hinged to the left side of the upper plate, and the bottom end of the left lower portion is hinged to the left side of the lower plate; The right side portion is formed by pivoting the right upper portion and the right lower portion, the pivoting portion protrudes toward the well wall, wherein the top end of the right upper portion is hinged to the right side of the upper plate, and the bottom end of the right lower portion is hinged to the right side of the lower plate; and further includes, A lateral restraint mechanism, which is used to constrain the end distance from the left side portion to the right side portion to be smaller than the well diameter range, and release the end distance from the left side portion to the right side portion to be equal to the well diameter in response to the rotation of the conductor rod; The second hole has an inner spiral; the conductor bar has an outer spiral, and is received in the conductive frame via the first hole and the second hole.

3. The electromagnetic launch system according to claim 2, characterized in that: Also included is a transmission device arranged on the lower plate, which includes: a ratchet centrally connected to the conductor rod; A pawl coupled to the ratchet wheel, a distal end of which is connected to an annular spring fixed to the lower plate, a head end of which is led out by a first pull rope; The pulley block is used for leading out the first pull rope.

4. The electromagnetic launch system according to claim 3, characterized in that: The first hole of the upper plate is a through hole; the upper plate is provided with a limiting device for limiting the up and down movement of the conductor rod during the rotation process.

5. The electromagnetic launch system according to claim 4, characterized in that: The upper plate includes a passage extending from the edge to the center, and the limiting device includes a spring steel nail, and the steel nail is fastened to the conductor rod at the center of the upper plate under the force of a tension spring; The end of the spring steel nail is led out from the second pull rope via a pulley.

6. The electromagnetic launch system according to claim 4, characterized in that: The power supply line, the first pull rope and the second pull rope are gathered together and wrapped around the steel cable and led out to the ground as a whole.

7. The electromagnetic launch system according to claim 5, characterized in that: It also includes a steel frame with a circular ring connected to the upper part of the conductive frame, and the steel wire cable is bundled from the steel frame with a circular ring and then led out to the ground.

8. The electromagnetic launch system according to claim 2, characterized in that: The lateral restraint mechanism comprises a left restraint portion and a right restraint portion which are symmetrical about the center of the conductor rod; wherein the left restraint portion comprises: A left extension portion, the left end of which is connected to the left side portion pivoting, and the right end of which is configured to be detachably connected to the left end of the left restriction portion while being restrained by a left compression spring; A left limiting portion, whose right end is connected to the conductor bar and whose left end is detachably connected to the right end of the left extending portion; The right side restraint includes: a right extension portion, the right end of which is connected to the right side portion pivoting position, and the left end of which is configured to be detachably connected to the right end of the right restriction portion while being restrained by a right compression spring; a right limiting portion, whose left end is connected to the conductor bar and whose right end is detachably connected to the left end of the right extending portion; The left and right limiting portions are configured to respond to the rotation of the conductor bar while failing to connect with the left or right stretching portion.

9. The electromagnetic launch system according to claim 2, characterized in that: The conductor bar comprises an upper half and a lower half; wherein, The lower half has an external spiral; The upper part is a stepped structure that is arranged sequentially or gradually, with the upper part being smaller and the lower part being larger, and the maximum value of the stepped cross section is equal to the inner diameter of the first hole.

10. The electromagnetic launch system according to claim 1, characterized in that: Conductor nails are arranged on both side ends of the conductive frame.

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