Short-wave multipurpose antenna capable of automatically adjusting pitch angle

Abstract

The invention relates to the technical field of antennas, in particular to a short-wave multipurpose antenna with an automatic pitch angle adjusting function, which comprises an antenna branch pipe, an adjusting worm arranged in the antenna branch pipe, an adjusting worm gear meshed with the adjusting worm and an antenna part, and is characterized in that the adjusting worm gear is fixedly connected with the antenna part, and the adjusting worm rotates to adjust the pitch angle of the antenna part. The adjusting worm gear is driven to drive the antenna part to perform pitch angle adjustment; according to the short-wave multipurpose antenna with the pitch angle automatic adjustment function, detection and automatic compensation can be carried out on the problem that the pitch angle of the antenna is changed due to the fact that the antenna branch pipe is bent due to wind power in a strong wind environment when the antenna branch pipe is long, and the directionality of the antenna under wind power interference is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and particularly to a short-wave multi-purpose antenna with automatic elevation angle adjustment. Background Art

[0002] A short-wave antenna is a transmitting or receiving antenna operating in the short-wave band of 1 to 30 MHz. There are many types of short-wave antennas. Among them, the short-wave antenna with logarithmic-periodic arrangement can maintain good performance in a very wide frequency range due to the structure of the logarithmic-periodic antenna, and has relatively stable directivity, and signals can be concentrated in a specific direction for transmission and reception. However, in practical applications, the longer the support rod of the antenna is, the more likely it is to generate an arc under the influence of wind, which in turn increases the elevation angle on the windward side, resulting in a certain deviation in direction and affecting the antenna performance. Summary of the Invention

[0003] The purpose of the present invention is to provide a short-wave multi-purpose antenna with automatic elevation angle adjustment to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A short-wave multi-purpose antenna with automatic elevation angle adjustment, including an antenna branch pipe, an adjustment worm provided in the antenna branch pipe, an adjustment worm gear meshing with the adjustment worm, and an antenna part. The adjustment worm gear and the antenna part are fixedly connected. By rotating the adjustment worm, the adjustment worm gear is driven to drive the antenna part to perform elevation angle adjustment. An integrated section, a base turntable, and a pressure sensor are also provided in the antenna branch pipe; The integrated section is arranged below the adjustment worm. The pressure sensor is fixedly arranged between the integrated section and the base turntable to detect the pressure change situation between the integrated section and the base turntable; Record the pressure value between the integrated section and the base turntable when the antenna is in a windless environment. When the pressure value between the integrated section and the base turntable changes beyond the set threshold range in a windy environment, the base turntable rotates to drive the integrated section and the adjustment worm to rotate, so that the antenna performs corresponding elevation angle adjustment.

[0005] An internal cavity is opened inside the integrated section. A partition convex ring is fixedly arranged on the inner wall of the internal cavity. A lock cover plug is arranged above the partition convex ring, and a lower push plate is arranged below the partition convex ring. Both the lock cover plug and the lower push plate are in airtight contact with the inner wall surface of the internal cavity.

[0006] A limiting square hole is vertically opened upward at the top of the internal cavity. A limiting square rod is inserted into the limiting square hole. The limiting square hole and the limiting square rod are in limiting cooperation, so that the limiting square rod can only stretch and move relative to the limiting square hole.

[0007] The upper part of the limiting square rod is fixedly installed coaxially with the adjusting worm, and the lower part of the limiting square rod is fixedly installed with the lock cover plug body.

[0008] A side wall cavity is provided in the integrated section, a locking clip is arranged in the side wall cavity, a locking outer groove is formed on the surface of the lock cover plug body, and a part of the locking clip is inserted into the locking outer groove to axially limit the lock cover plug body.

[0009] A clip elastic sheet is arranged in the side wall cavity, and the clip elastic sheet applies an elastic pressure to the locking clip, so that the locking clip has an elastic tendency to move into the locking outer groove.

[0010] A lifting spring is arranged below the push-down disc, and an upward elastic thrust is applied to the push-down disc through the lifting spring. A vent hole is provided through the bottom of the inner section cavity.

[0011] Solid gunpowder is arranged inside the lock cover plug body, and an electric pin is connected to the solid gunpowder; A power-receiving copper ring is embedded and installed on the outer surface of the integrated section. An elastic contact shaft is arranged on the inner wall of the antenna branch pipe. The elastic contact shaft is in elastic extrusion contact with the power-receiving copper ring, and the power-receiving copper ring is slidably powered through the elastic contact shaft. The power-receiving copper ring is connected to the electric pin, and when the power-receiving copper ring is powered on, the solid gunpowder can be detonated through the electric pin.

[0012] A return extraction hole is provided through the partition convex ring. An outer sealing sleeve is fixedly arranged on the inner wall surface of the antenna branch pipe. The outer sealing sleeve is sleeved outside the integrated section and is in airtight contact with the outer surface of the integrated section. The inner cavity of the inner section cavity is communicated with the outer sealing sleeve through the return extraction hole.

[0013] A normally closed air extraction pump is fixedly arranged in the antenna branch pipe. A pipe wall air path is provided in the side wall of the antenna branch pipe. The normally closed air extraction pump is communicated with the outer sealing sleeve through the pipe wall air path.

[0014] A positioning hole is provided through the base turntable. A positioning insertion shaft is fixedly arranged at the bottom of the integrated section. The positioning insertion shaft is inserted through the positioning hole in a limited manner.

[0015] A turntable bottom shaft is fixedly arranged at the bottom of the base turntable. A limiting wall ring is fixedly arranged on the inner wall surface of the antenna branch pipe. The limiting wall ring is sleeved outside the turntable bottom shaft. A blocking ring is fixedly arranged on the turntable bottom shaft. The blocking ring clamps the limiting wall ring, so that the turntable bottom shaft is axially limited relative to the limiting wall ring.

[0016] A servo motor is fixedly arranged inside the antenna branch pipe. The motor shaft of the servo motor is in transmission connection with the turntable bottom shaft, and the turntable bottom shaft and the base turntable are driven to rotate through the servo motor.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a short-wave multi-purpose antenna with automatic pitch angle adjustment. It can detect and automatically compensate for the problem of the pitch angle change of the antenna caused by the bending of the antenna branch pipe due to wind force in a strong wind environment when the antenna branch pipe is relatively long, thereby improving the directivity of the antenna under wind interference.

[0018] The present invention is applicable to the working conditions where the antenna branch pipe is relatively long. Since the long antenna branch pipe makes the antenna inconvenient to maintain, through the cooperation of structures such as the integrated section, the lock cover plug, the push-down disk and the normally closed air extraction pump, when there are foreign matters such as dust accumulation or snow covering on the antenna, the adjusting worm can be driven to protrude a certain distance relative to the integrated section impactively to vibrate the antenna, shake off the surface attachments, and then reset to make the adjusting worm and the integrated section relatively fixed, which can effectively reduce the maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of a three-dimensional semi-section of the present invention.

[0021] Figure 3 It is Figure 2 An enlarged schematic diagram of area A in

[0022] Figure 4 It is Figure 3 An enlarged schematic diagram of area B in

[0023] Figure 5 It is Figure 3 An enlarged schematic diagram of area C in

[0024] Figure 6 It is a front view of a three-dimensional semi-section of the present invention.

[0025] Figure 7 It is Figure 6 An enlarged schematic diagram of area D in

[0026] Figure 8 It is Figure 7 An enlarged schematic diagram of area E in

[0027] Figure 9 It is a schematic diagram of a three-dimensional semi-section of the present invention from another angle.

[0028] Figure 10 It is Figure 9 An enlarged schematic diagram of area F in

[0029] Figure 11 It is Figure 10 An enlarged schematic diagram of area G in

[0030] In the figure: 1, antenna branch pipe; 2, adjusting worm; 3, adjusting worm gear; 4, antenna part; 5, integrated section; 6, base turntable; 7, pressure sensor; 501, internal section cavity; 502, separating convex ring; 503, lock cover plug body; 504, push-down plate; 505, limiting square hole; 506, limiting square rod; 507, side wall cavity; 508, locking clip; 509, locking outer groove; 510, clip spring; 511, lifting spring; 512, air vent hole; 513, solid gunpowder; 514, electrical pin; 515, power receiving copper ring; 516, elastic contact shaft; 517, return extraction hole; 518, outer sealing sleeve; 519, pipe wall air path; 520, normally closed air pump; 601, positioning hole; 602, positioning insertion shaft; 603, turntable bottom shaft; 604, limiting wall ring; 605, blocking ring; 606, servo motor; 301, pitching support arm; 302, clamping assembly; 303, worm gear main shaft; 304, outer side shaft plate. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1 to 11 , the present invention provides a technical solution: a short-wave multi-purpose antenna with automatic pitch angle adjustment, as shown in Figure 2 and Figure 3 , including an antenna branch pipe 1, an adjusting worm 2 arranged in the antenna branch pipe 1, an adjusting worm gear 3 meshing with the adjusting worm 2, and an antenna part 4. The adjusting worm gear 3 and the antenna part 4 are fixedly connected. By rotating the adjusting worm 2, the adjusting worm gear 3 is driven to drive the antenna part 4 to adjust the pitch angle.

[0033] As shown in Figure 4 and Figure 5 , an integrated section 5, a base turntable 6 and a pressure sensor 7 are further arranged in the antenna branch pipe 1; the pressure sensor 7 is a pressure sensing element in the prior art and can perform two-way sensing of pressure and tension. Under the action of pressure or tension, the pressure sensor 7 only produces a microscopic axial deformation and will not cause obvious up and down movement of the adjusting worm 2, thereby avoiding antenna instability.

[0034] The integrated section 5 is arranged at the lower part of the adjusting worm 2, and the pressure sensor 7 is fixedly arranged between the integrated section 5 and the base turntable 6. The pressure change between the integrated section 5 and the base turntable 6 is detected by the pressure sensor 7; the pressure value between the integrated section 5 and the base turntable 6 is recorded in a windless environment; when the pressure value between the integrated section 5 and the base turntable 6 changes beyond the set threshold range in a windy environment, the base turntable 6 rotates to drive the integrated section 5 and the adjusting worm 2 to rotate, so that the antenna makes corresponding pitch angle adjustment.

[0035] As Figure 4 shown in, an internal cavity 501 is formed inside the integrated section 5. A partition convex ring 502 is fixedly arranged on the inner wall of the internal cavity 501. A locking cover plug 503 is arranged above the partition convex ring 502, and a lower push plate 504 is arranged below the partition convex ring 502. Both the locking cover plug 503 and the lower push plate 504 are in airtight contact with the inner wall surface of the internal cavity 501.

[0036] A limiting square hole 505 is formed through the top of the internal cavity 501 upwards. A limiting square rod 506 is inserted into the limiting square hole 505. The limiting square hole 505 and the limiting square rod 506 are in limiting cooperation, so that the limiting square rod 506 can only move telescopically relative to the limiting square hole 505. The upper part of the limiting square rod 506 is fixedly installed coaxially with the adjusting worm 2, and the lower part of the limiting square rod 506 is fixedly installed with the locking cover plug 503.

[0037] A side wall cavity 507 is formed in the integrated section 5. A locking member 508 is arranged in the side wall cavity 507. A locking outer groove 509 is formed on the surface of the locking cover plug 503. A part of the locking member 508 is inserted into the locking outer groove 509 to axially limit the locking cover plug 503.

[0038] A clip spring 510 is arranged in the side wall cavity 507. The clip spring 510 applies an elastic pressure to the locking member 508, so that the locking member 508 has an elastic tendency to move into the locking outer groove 509.

[0039] A lifting spring 511 is arranged below the lower push plate 504. An upward elastic thrust is applied to the lower push plate 504 through the lifting spring 511. An air vent hole 512 is formed through the bottom of the internal cavity 501 to the outside. As Figure 4 shown in, when the lower push plate 504 moves down rapidly under the drive of the explosion pressure, the gas below the lower push plate 504 is discharged to the outside atmosphere through the air vent hole 512, so as to avoid affecting the downward movement of the lower push plate 504.

[0040] Solid gunpowder 513 is arranged inside the locking cover plug 503, and electric pins 514 are connected to the solid gunpowder 513; On the outer surface of the integrated section 5, a power-receiving copper ring 515 is embedded and installed. An elastic contact shaft 516 is provided on the inner wall of the antenna branch pipe 1. The elastic contact shaft 516 is in elastic extrusion contact with the power-receiving copper ring 515, and the power-receiving copper ring 515 is slidably powered through the elastic contact shaft 516. The power-receiving copper ring 515 is connected to the electrical pin 514. When the power-receiving copper ring 515 is energized, the solid gunpowder 513 can be detonated through the electrical pin 514.

[0041] A return extraction hole 517 is penetrated through the partition convex ring 502. An outer sealing sleeve 518 is fixedly provided on the inner wall surface of the antenna branch pipe 1. The outer sealing sleeve 518 is sleeved outside the integrated section 5 and is in airtight contact with the outer surface of the integrated section 5. The inner cavity of the inner section cavity 501 is communicated with the outer sealing sleeve 518 through the return extraction hole 517.

[0042] A normally closed air extraction pump 520 is fixedly provided in the antenna branch pipe 1. A pipe wall air path 519 is opened in the side wall of the antenna branch pipe 1. The normally closed air extraction pump 520 is communicated with the outer sealing sleeve 518 through the pipe wall air path 519. The normally closed air extraction pump 520 is in a normally closed state in the non-working state, that is, gas cannot flow in and out through the normally closed air extraction pump 520, so that the pressure generated by the solid gunpowder 513 will not leak out through the return extraction hole 517.

[0043] A positioning hole 601 is penetrated through the base turntable 6. A positioning insertion shaft 602 is fixedly provided at the bottom of the integrated section 5. The positioning insertion shaft 602 is limited and inserted through the positioning hole 601. A turntable bottom shaft 603 is fixedly provided at the bottom of the base turntable 6. A limiting wall ring 604 is fixedly provided on the inner wall surface of the antenna branch pipe 1. The limiting wall ring 604 is sleeved outside the turntable bottom shaft 603. A blocking ring 605 is fixedly provided on the turntable bottom shaft 603. The blocking ring 605 clamps the limiting wall ring 604, so that the turntable bottom shaft 603 is axially limited relative to the limiting wall ring 604. A servo motor 606 is fixedly provided inside the antenna branch pipe 1. The motor shaft of the servo motor 606 is in transmission connection with the turntable bottom shaft 603, and the turntable bottom shaft 603 and the base turntable 6 are driven to rotate through the servo motor 606.

[0044] As Figure 2 and Figure 3 As shown in

[0045] On the outside of the antenna branch pipe 1, an outer shaft plate 304 is fixedly provided. A worm wheel main shaft 303 is fixedly provided in the outer shaft plate 304. As Figure 3 shown in

[0046] When the present invention is in use, first, the pressure value detected by the pressure sensor 7 under the condition of no wind after the antenna is installed is recorded.

[0047] When strong wind acts on the antenna part 4, it will cause a certain bending of the antenna branch pipe 1. Since the signals emitted by the antenna part 4 are distributed in a fan shape in a directional manner, when the wind force perpendicular to the length direction of the clamping assembly 302 on the horizontal plane causes the antenna branch pipe 1 to bend, it will not cause an obvious impact on the signals of the antenna part 4.

[0048] On the horizontal plane, when the wind force parallel to the length direction of the clamping assembly 302 causes the antenna branch pipe 1 to bend, it will cause a large change in the pitch angle of the antenna part 4, and the influence of the pitch angle change on the signals is relatively large. Combining Figure 2 and Figure 3 as shown, when the antenna part 4 is subjected to the wind force parallel to the length direction of the clamping assembly 302 on the horizontal plane, it will cause a rotational driving force to be generated on the adjusting worm gear 3. Since the adjusting worm gear 3 and the adjusting worm 2 are self-locked and matched with each other, the rotational driving force of the adjusting worm gear 3 acts on the adjusting worm 2, causing the adjusting worm 2 to generate an axial lifting driving force.

[0049] Further combining Figure 4 and Figure 5 as shown, for the sake of convenience of understanding temporarily, the adjusting worm 2 and the integrated section 5 can be regarded as an integrally fixed structure. The lifting pressure conducted by the adjusting worm 2 will directly act on the pressure sensor 7 through the integrated section 5. Since the base turntable 6 can only rotate and cannot move axially, the change situation of the lifting pressure received by the adjusting worm 2 can be detected through the pressure sensor 7 and compared with the pressure value recorded under the condition of no wind. Taking Figure 2 as shown as an example, assuming that the wind blows horizontally from the right to the left, at this time, the pressure generated by the wind force acting on the antenna part 4 will cause the top of the antenna branch pipe 1 to bend towards the left, and at this time, the right side of the antenna part 4 tilts up. Further referring to Figure 3 , at this time, the adjusting worm gear 3 has a driving force to rotate counterclockwise, causing the adjusting worm 2 to have an upward moving pressure. Through conduction by the integrated section 5, the pressure value detected by the pressure sensor 7 decreases. After exceeding the set threshold, the base turntable 6 is driven to rotate by the servo motor 606, driving the integrated section 5 and the adjusting worm 2 to rotate, causing the adjusting worm gear 3 to rotate clockwise, and pulling back the pitch angle of the antenna part 4.

[0050] Since factors such as the different lengths of the antenna branch pipe 1 and the different elastic coefficients of the materials will affect the adjustment coefficient of the pitch angle, in specific applications, it needs to be determined in combination with the actual test according to factors such as the elastic coefficient of the material adopted by the antenna branch pipe 1 and the set length.

[0051] The antenna in the present invention mainly faces the working conditions where the antenna branch pipe 1 is relatively long and the antenna is arranged at a relatively high position. In such working conditions, it is inconvenient to clean and maintain the antenna part 4. When the surface of the antenna part 4 is covered with dust or snow, it is equivalent to adding a layer of medium between the antenna radiator and the surrounding space. This layer of medium will scatter and absorb the electromagnetic waves emitted by the antenna, increasing the energy loss during the transmission of electromagnetic waves, thereby reducing the radiation efficiency of the antenna.

[0052] The present invention can achieve automatic cleaning, specifically as Figure 4 and Figure 8 shown in, through the sliding contact between the elastic contact shaft 516 and the current-receiving copper ring 515, power is supplied to the electrical pin 514 to detonate the solid gunpowder 513; the pressure generated by the explosion of the solid gunpowder 513 acts in the sealed cavity formed by the cooperation of the lock cover plug body 503, the partition convex ring 502, and the push-down disk 504. Since the lock cover plug body 503 is locked, the pressure first drives the push-down disk 504 to move downward. When the push-down disk 504 moves downward, by squeezing and contacting the locking member 508, the locking member 508 moves to both sides. At this time, the locking member 508 moves out of the locking outer groove 509 to unlock the lock cover plug body 503. After the lock cover plug body 503 is unlocked, the pressure continues to act on the lock cover plug body 503, causing the lock cover plug body 503 to move upward, driving the adjusting worm 2 to move upward quickly through the limiting square rod 506, as Figure 3 shown in. When the adjusting worm 2 moves upward impulsively for a short distance, the adjusting worm gear 3 will be impacted and rotated for a certain period. Manifested on the antenna part 4, the antenna part 4 will vibrate strongly and deflect by a certain angle, thereby vibrating and removing the coverings on the antenna part 4. Since the antenna part 4 will deflect by a certain angle, it will affect the signal. When removing the coverings, an idle period needs to be selected. In the above process, the solid gunpowder 513 realizes two-stage driving through explosion, so the solid gunpowder 513 uses a relatively mild gunpowder to extend the explosion pressure release time.

[0053] After the above is completed, the normally closed air pump 520 is started. Through the pipe wall air path 519 and the outer sealing sleeve 518, the return suction hole 517 performs negative pressure suction. When the push-down disk 504 moves upward in place, the negative pressure acts on the lock cover plug body 503, causing the lock cover plug body 503 to slowly move downward and reset. Due to the elastic pressure of the locking member 508 under the elastic pressure of the clip spring 510, it has an elastic tendency to move towards the locking outer groove 509. When the locking outer groove 509 resets to the initial height, the locking member 508 will re-insert into the locking outer groove 509, locking the lock cover plug body 503 relative to the integrated section 5. At this time, the adjusting worm 2 and the integrated section 5 can be regarded as an integral fixed structure. After the structure resets, the deflection of the antenna part 4 will also be completed synchronously.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shortwave multi-purpose antenna with automatic pitch angle adjustment, comprising an antenna branch tube, an adjustment worm arranged in the antenna branch tube, an adjustment worm wheel meshing with the adjustment worm wheel, and an antenna part, wherein the adjustment worm wheel and the antenna part are fixedly connected, and the adjustment worm wheel is driven to drive the antenna part to adjust the pitch angle by rotating the adjustment worm wheel, and the antenna part is characterized in that: The antenna branch pipe is also provided with an integrated node, a base turntable and a pressure sensor; The integrated joint is arranged at the lower part of the adjusting worm, and the pressure sensor is fixedly arranged between the integrated joint and the base turntable, and the pressure change between the integrated joint and the base turntable is detected by the pressure sensor; The pressure value between the integrated node and the base turntable of the antenna in a windless environment is recorded; when the pressure value between the integrated node and the base turntable changes beyond the set threshold range in a windy environment, the base turntable rotates to drive the integrated node and the adjustment worm to rotate, so that the antenna can adjust the corresponding pitch angle.

2. A shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 1, characterized in that: An internal node cavity is opened inside the integrated node, a separation convex ring is fixedly provided on the inner wall of the internal node cavity, a lock cover plug body is provided on the upper part of the separation convex ring, and a lower push plate is provided on the lower part of the separation convex ring, and the lock cover plug body and the lower push plate are both in airtight contact with the inner wall surface of the internal node cavity.

3. A shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 2, characterized in that: A limiting square hole is formed through the top of the internal section cavity, and a limiting square rod is inserted in the limiting square hole. The limiting square hole and the limiting square rod are limitedly matched so that the limiting square rod can only be telescopically movable relative to the limiting square hole.

4. The shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 3, characterized in that: The upper part of the limiting square rod is coaxially fixedly installed with the adjusting worm, and the lower part of the limiting square rod is fixedly installed with the lock cover plug body.

5. The shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 3, characterized in that: A side wall cavity is provided in the integrated joint, a locking card is arranged in the side wall cavity, a locking outer groove is provided on the surface of the lock cover plug body, and a part of the locking card is inserted into the locking outer groove to axially limit the lock cover plug body.

6. A shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 5, characterized in that: A card spring piece is arranged in the side wall cavity, and the card spring piece applies elastic pressure to the locking card, so that the locking card has an elastic tendency to move toward the locking outer groove.

7. The shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 2, characterized in that: A lifting spring is arranged below the lower push plate, and an upward elastic thrust is applied to the lower push plate by the lifting spring. An air vent hole is opened through the bottom of the internal section cavity to the outside.

8. The shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 6, characterized in that: Solid gunpowder is arranged inside the lock cover plug body, and an electric pin is connected to the solid gunpowder; A power-receiving copper ring is embedded and installed on the outer surface of the integrated node, and an elastic contact shaft is arranged on the inner wall of the antenna branch pipe. The elastic contact shaft is in elastic compression contact with the power-receiving copper ring, and the power-receiving copper ring is slidably powered by the elastic contact shaft. The power-receiving copper ring is connected to the electric pin, and when the power-receiving copper ring is energized, the solid gunpowder can be detonated through the electric pin.

9. The shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 8, characterized in that: A return hole is provided through the separating convex ring, an outer sealing sleeve is fixedly provided on the inner wall surface of the antenna branch pipe, the outer sealing sleeve is sleeved on the outside of the integrated joint and is in airtight contact with the outer surface of the integrated joint, and the inner cavity of the internal node cavity is connected with the outer sealing sleeve through the return hole.

10. The shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 9, characterized in that: A normally closed air pump is fixedly arranged in the antenna branch pipe, a pipe wall air path is opened in the side wall of the antenna branch pipe, and the normally closed air pump is communicated with the outer sealing sleeve through the pipe wall air path.

11. The shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 1, characterized in that: A positioning hole is formed through the base turntable, and a positioning plug shaft is fixedly provided at the bottom of the integrated joint, and the positioning plug shaft is limitedly inserted through the positioning hole.

12. The shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 1, characterized in that: A turntable bottom shaft is fixedly arranged at the bottom of the base turntable, a limiting wall ring is fixedly arranged on the inner wall surface of the antenna branch pipe, the limiting wall ring is sleeved on the outside of the turntable bottom shaft, and a blocking ring is fixedly arranged on the turntable bottom shaft, the blocking ring clamps the limiting wall ring, so that the turntable bottom shaft is axially limited relative to the limiting wall ring.

13. A shortwave multi-purpose antenna with automatic pitch angle adjustment according to claim 12, characterized in that: A servo motor is fixedly arranged inside the antenna branch pipe, and the motor shaft of the servo motor is drivingly connected with the turntable bottom shaft, and the turntable bottom shaft and the base turntable are driven to rotate by the servo motor.

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