Transmission line drill-through tower and transmission line tower system

Abstract

The application discloses a power transmission line crossing tower and a power transmission line tower system, and relates to the technical field of power towers, which comprises a tower body, the top of the tower body is provided with a cross arm, the two sides of the top of the cross arm are provided with grounding racks, the middle and the ends of the cross arm are both provided with insulator strings through hangers, the ends of the insulator strings are provided with ball joint assemblies, the ends of the ball joint assemblies are provided with buffer assemblies, the ends of the buffer assemblies are provided with fixed fittings, the ball joint assembly comprises a spherical groove seat, a ball seat is rollingly matched in the spherical groove seat, the side surface of the ball seat is provided with a connecting rod, the buffer assembly comprises a fixed seat, the fixed seat is correspondingly provided with two, the two ends of each fixed seat are both hingedly connected with connecting rods, a movable seat is hingedly connected between the two opposite connecting rods, and connecting plates are staggered between the two movable seats, the application can timely intervene when the tension of the cable increases to a certain degree, prevents the tension from further increasing to damage the tower body and the cable fixing structure, and effectively suppresses the swing of the cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power towers, in particular to a power transmission line drilling tower and a power transmission line tower system. BACKGROUND

[0002] With the continuous development of urban power grids and regional power grids, new power transmission line corridors are increasingly strained, and new cable lines often need to be built to "drill" through the existing overhead power transmission lines from below. In addition, power transmission lines often need to pass through complex terrains or cross various obstacles, such as rivers, valleys, railways, highways, urban building groups, and ecological protection areas. Therefore, drilling towers are widely used.

[0003] A single-circuit power transmission line tower with patent number 202010628601.2 includes a tower body, a curved arm, a ground wire rack, a conductor cross arm, and an additional cross arm. The tower body is used to be buried in the ground, and the curved arm is connected to the tower body. The conductor cross arm includes a first conductor cross arm, a second conductor cross arm, and a third conductor cross arm connected in sequence, and the second conductor cross arm is connected to the curved arm. The ground wire rack includes at least one first ground wire rack and a second ground wire rack, the first ground wire rack is connected to the first conductor cross arm, and the second ground wire rack is connected to the third conductor cross arm. The additional cross arm is connected to the first conductor cross arm or the third conductor cross arm, and the additional cross arm on the drilling tower drilling tower is provided with a ground wire, and the additional cross arm on the non-drilling tower is not provided with a ground wire. However, in actual use, the cable and the insulator string are connected rigidly, and the tension of the cable is difficult to adjust automatically, which cannot adapt to the change of the tension of the cable.

[0004] In addition, due to the influence of external temperature, the conductor contracts and the length becomes shorter, which will cause the sag to decrease and the tension of the conductor to increase. When the tension of the cable increases to the limit, it will further increase the load of the tower structure and the cable fixing structure, causing damage to the tower structure and the cable fixing structure. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the existing defects and provide a power transmission line drilling tower and a power transmission line tower system. When the tension of the cable increases to a certain extent, it can be intervened in time to prevent the tension from further increasing and damaging the tower body and the cable fixing structure, which can effectively solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a power transmission line drilling tower, comprising a tower body, a cross arm provided at the top of the tower body, a ground wire rack provided at both sides of the top of the cross arm, an insulator string hung by a hanging piece at the middle and end of the cross arm, a ball joint assembly provided at the end of the insulator string, a buffer assembly provided at the end of the ball joint assembly, and a fixing fitting provided at the end of the buffer assembly.

[0007] The ball joint assembly comprises a spherical groove seat, a ball seat is rolling fitted in the spherical groove seat, and a connecting rod is arranged on the side surface of the ball seat;

[0008] The buffer assembly comprises a fixed seat, two fixed seats are correspondingly arranged, two ends of each fixed seat are hingedly connected with connecting rods, a movable seat is hingedly connected between the opposite two connecting rods, connecting plates are staggered between the movable seats on the two sides, and buffer springs are arranged between the two connecting plates;

[0009] A hinged seat is arranged on the fixed seat away from the ball joint assembly, and the end of the hinged seat is rotationally connected with the back side of the fixed fitting;

[0010] An auxiliary linkage protection mechanism is arranged between the ball joint assembly and the buffer assembly, and a main linkage protection mechanism is arranged between the buffer assembly and the fixed fitting.

[0011] Preferably, a cable is fixed on the fixed fitting, the fixed fitting has a "┌" shaped structure, an arc-shaped groove matched with the cable is formed in the inner side of the fixed fitting, and a U-shaped fastener for fixing the cable is arranged on the fixed fitting.

[0012] Preferably, the connecting rod penetrates through the opening formed in the side surface of the spherical groove seat, and an elastic pad is arranged on the opening;

[0013] The ball seat has a hollow structure, and the connecting rod has a hollow structure in communication with the ball seat.

[0014] Preferably, uniform through holes are formed in the inner wall of the ball seat, a pin column is slidingly fitted in the through hole, and a limiting groove is uniformly formed in the inner wall of the spherical groove seat.

[0015] Preferably, the fixed seat near the ball joint assembly is arranged at the end of the connecting rod, the connecting rods on the two fixed seats are oppositely arranged, and the connecting plate has an L-shaped structure.

[0016] Preferably, the auxiliary linkage protection mechanism comprises a limiting column, the limiting column is arranged on the side surface of the connecting plate near the ball joint assembly, a limiting seat is movably sleeved on the limiting column, the limiting seat is provided with a guide rod through an end seat, the guide rod extends into the connecting rod through the fixed seat on one side, the end of the guide rod is provided with a piston slidingly fitted with the inner wall of the connecting rod, and a stretching spring is sleeved on the outer portion of the guide rod.

[0017] Preferably, the main linkage protection mechanism comprises a sliding seat and a positioning seat, the sliding seat slidingly penetrates through the surface of the hinged seat, a pressing seat is arranged on the side surface of the sliding seat, an elastic piece is arranged between the pressing seat and the surface of the hinged seat, the positioning seat is arranged on the back side of the fixed fitting, and the end of the positioning seat abuts against the side surface of the sliding seat.

[0018] Preferably, the surface of the hinged seat is provided with a support, the side surface of the support is slid through a sliding rod, the sliding rod penetrates the side surface of the sliding seat, the sliding rod is provided with a baffle, and the sliding rod is sleeved with a limiting spring at the position between the baffle and the support, and the main linkage protection mechanism further comprises a blocking seat arranged on the movable seat, and the blocking seat is in abutment with the end of the sliding rod.

[0019] The application further discloses a power transmission line tower system, which comprises at least one above-mentioned drilling tower and a plurality of conventional power transmission towers, and the drilling tower and the conventional power transmission towers are connected through cables.

[0020] Compared with the prior art, the application has the following beneficial effects:

[0021] 1、The buffering assembly is arranged, when the tension of the cable changes, the two fixed seats are away from each other under the action of tension, the movable seat is folded, and the connecting plate compresses the buffering spring, so that the tension change is adaptively absorbed, the direct load of the cable tension fluctuation on the tower body structure, the insulator string and the cable fixing structure is effectively offset, the structure damage caused by the continuous increase of the tension is prevented, and the reliability and service life of the overall system are improved.

[0022] 2、When the tension of the cable increases to a preset value, the blocking seat on the movable seat is separated from the end of the sliding rod, the limiting spring in the compressed state is quickly stretched, the sliding rod is separated from the sliding seat to release the limiting, the elastic member is stretched to push the sliding seat away from the positioning seat, the fixed fitting is rotated around the end of the hinged seat, the cable tensioning allowance is effectively increased, the cable tension is quickly reduced, and the cable fixing structure, the insulator string and the tower body are prevented from being damaged due to the tension breaking through the bearing limit.

[0023] 3、When the main linkage protection mechanism acts, the limiting column on the connecting plate is separated from the limiting seat, the tensile spring in the stretched state is contracted and reset, the end seat drives the guide rod and the piston to move towards the inside of the ball seat, the pressure in the ball seat is increased to push the pin column to extend through the through hole, and the pin column is inserted into the limiting groove in the inner wall of the spherical groove seat, so that the rolling between the ball seat and the spherical groove seat is limited, the swing amplitude of the cable is inhibited, the stability of the tower body, the insulator string and the cable fixing structure is ensured, and the structure instability problem caused by the increase of sag is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the application;

[0025] Figure 2 It is a structural schematic diagram of the buffering assembly of the application;

[0026] Figure 3 It is a partial sectional view structural schematic diagram of the application;

[0027] Figure 4 It is a partial sectional view structural schematic diagram of the application Figure 3Enlarged structural schematic view at A;

[0028] Figure 5 For the invention Figure 3 Enlarged structural schematic view at B;

[0029] In the figure: 1, tower body; 101, cross arm; 102, grounding rack; 103, hanging piece; 104, insulator string; 2, ball joint assembly; 201, spherical groove seat; 202, ball seat; 203, connecting rod; 204, through hole; 205, pin column; 206, limiting groove; 3, buffer assembly; 301, fixed seat; 302, connecting rod; 303, movable seat; 304, connecting plate; 305, buffer spring; 306, limiting column; 307, limiting seat; 308, end seat; 309, guide rod; 310, piston; 311, tension spring; 312, hinged seat; 313, sliding seat; 314, pressing seat; 315, elastic piece; 316, positioning seat; 317, support; 318, sliding rod; 319, baffle; 320, limiting spring; 321, blocking seat; 4, fixed fitting; 401, cable. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] Please refer to Figures 1-5 The present application discloses a power transmission line drilling tower, comprising a tower body 1, the top of the tower body 1 is provided with a cross arm 101, the top of the cross arm 101 is provided with grounding racks 102 on both sides, and the middle and end of the cross arm 101 are both provided with insulator strings 104 through hanging pieces 103.

[0032] Specifically, the tower body 1 adopts an angle steel structure, has good wind resistance, ice resistance and shock resistance, the bottom of the tower body 1 is fixed on a preset tower foundation, the cross arm 101 is made of high-strength steel material, the grounding racks 102 are used for lightning protection and grounding, and the insulator strings 104 are arranged close to the horizontal to realize electrical insulation between the tower body 1 and the cable 401.

[0033] The end of the buffer assembly 3 is provided with a fixed fitting 4, the fixed fitting 4 is fixed with the cable 401, the fixed fitting 4 has a “┌” shape structure, an arc-shaped groove matched with the cable 401 is formed in the inner side of the fixed fitting 4, and the fixed fitting 4 is provided with a U-shaped fastener for fixing the cable 401.

[0034] Specifically, the design of the "┌" shaped structure facilitates the bending and turning of the cable 401, and increases the friction force. The anti-skid pad is arranged in the arc-shaped groove to enhance the friction force. The arc-shaped section of the U-shaped fastener and the arc-shaped groove on the inner side of the fixing fitting 4 are combined into a circular structure to better wrap and fix the cable 401.

[0035] The end of the insulator string 104 is provided with a ball joint assembly 2, which includes a spherical groove seat 201, a ball seat 202 is rollingly fitted in the spherical groove seat 201, the side surface of the ball seat 202 is provided with a connecting rod 203, the connecting rod 203 penetrates an opening formed in the side surface of the spherical groove seat 201, and an elastic pad is arranged on the opening.

[0036] Specifically, when the cable 401 swings, the connecting rod 203 is driven to swing by the fixing fitting 4 and the buffer assembly 3. The opening provides a swing space for multi-angle swinging of the cable 401, and the elastic pad provides elastic buffering for the swinging of the connecting rod 203, thereby reducing wear.

[0037] The end of the ball joint assembly 2 is provided with a buffer assembly 3, which includes two fixed seats 301. The fixed seat 301 close to the ball joint assembly 2 is arranged at the end of the connecting rod 203. The two ends of each fixed seat 301 are hingedly connected with a connecting rod 302. The connecting rods 302 on the two fixed seats 301 are oppositely arranged. An activity seat 303 is hingedly connected between the two opposite connecting rods 302. The two activity seats 303 are staggered with a connecting plate 304 therebetween. The connecting plate 304 is in an L-shaped structure. A buffer spring 305 is arranged between the two connecting plates 304. A hinged seat 312 is arranged on the fixed seat 301 away from the ball joint assembly 2. The end of the hinged seat 312 is rotationally connected with the back side of the fixing fitting 4.

[0038] Specifically, under the action of the tension of the cable 401, the fixed seat 301 away from the ball joint assembly 2 is pulled, so that the two fixed seats 301 move away from each other, and the two activity seats 303 move towards each other. The bending sections of the two staggered connecting plates 304 move close to each other, so that the buffer spring 305 is compressed. When the tension of the cable 401 increases, the buffer spring 305 is adaptively compressed. When the tension of the cable 401 decreases, the buffer spring 305 is adaptively stretched and reset. Thus, the influence of the change of the tension of the cable 401 on the structure of the tower body 1, the structure of the insulator string 104 and the fixing structure of the cable 401 is offset, so that the change of the tension of the cable 401 does not directly act on the structure of the tower body 1, the structure of the insulator string 104 and the fixing structure of the cable 401, thereby effectively protecting the overall structure.

[0039] However, in actual use, especially under the low-temperature contraction of the cable 401 and the external wind force, the tension of the cable 401 will greatly increase, and when the tension increases to exceed the bearing limit of the structural design, the cable 401 fixing structure, the insulator string 104 structure and the tower body 1 structure are easily damaged, so the following improvements are made:

[0040] The hinged seat 312 is provided with a main linkage protection mechanism, which includes a sliding seat 313, a positioning seat 316 and a blocking seat 321. The sliding seat 313 slides through the surface of the hinged seat 312, and the side surface of the sliding seat 313 is provided with a pressing seat 314. The pressing seat 314 and the surface of the hinged seat 312 are provided with an elastic element 315. The positioning seat 316 is arranged at the back side of the bottom of the fixed fitting 4, and the end of the positioning seat 316 abuts against the side surface of the sliding seat 313. The surface of the hinged seat 312 is provided with a support 317, and the side surface of the support 317 is slidably penetrated by a sliding rod 318. The sliding rod 318 penetrates the side surface of the sliding seat 313, and the sliding rod 318 is provided with a baffle 319. The sliding rod 318 is sleeved with a limiting spring 320 at the position between the baffle 319 and the support 317. The blocking seat 321 is arranged on the movable seat 303, and the blocking seat 321 abuts against the end of the sliding rod 318.

[0041] Specifically, in the initial state, the limiting spring 320 and the elastic element 315 are in a compressed state. The elastic element 315 is preferably a spring, and the fixed fitting 4 cannot rotate around the end of the hinged seat 312 due to the abutment of the positioning seat 316 and the sliding seat 313. The sliding rod 318 penetrates the sliding seat 313 to limit the sliding seat 313. Under normal tension, the up-down movement of the blocking seat 321 will not be separated from the sliding rod 318.

[0042] In use, as the cable 401 is gradually tensioned, the distance between the two movable seats 303 gradually decreases, and the end of the sliding rod 318 slides along the side surface of the blocking seat 321. When the tension of the cable 401 increases to a preset value, the blocking seat 321 is completely separated from the end of the sliding rod 318. At the same time, the compressed limiting spring 320 quickly extends and resets, and drives the sliding rod 318 to slide away from the sliding seat 313 by pushing the baffle 319, so that the end of the sliding rod 318 is separated from the sliding seat 313, and the limiting of the sliding rod 318 to the sliding seat 313 is released. At the same time, the elastic element 315 quickly extends and resets, and drives the sliding seat 313 to slide away from the positioning seat 316 by the pressing seat 314, as Figure 3As shown, after the side of the sliding seat 313 completely separates from the positioning seat 316, since the end of the hinged seat 312 is rotationally connected with the middle part of the back side of the fixed fitting 4, and the rotation position does not correspond to the cable 401, under the pulling force of the cable 401, the top of the fixed fitting 4 is pulled to rotate, thereby effectively increasing the tensioning allowance of the cable 401, reducing the tensioning force of the cable 401, and preventing the tensioning force of the cable 401 from breaking the limit to cause damage to the cable 401 fixed structure, the insulator string 104 structure and the tower body 1 structure.

[0043] However, when the main linkage protection mechanism is in action to increase the tensioning allowance of the cable 401, the sag will increase, the swing amplitude of the cable 401 will increase, and the stability of the overall structure will be affected, so the following improvement is made:

[0044] The ball seat 202 is a hollow structure, the connecting rod 203 is a hollow structure in communication with the ball seat 202, the inner wall of the ball seat 202 is uniformly provided with through holes 204, the inside of the through hole 204 is slidably fitted with a pin column 205, and the inner wall of the spherical groove seat 201 is uniformly provided with limiting grooves 206.

[0045] Specifically, the connecting rod 203 and the ball seat 202 are both hollow to form a continuous sealed chamber, the through holes 204 and the limiting grooves 206 are densely distributed on the ball seat 202 and the spherical groove seat 201 respectively, in the normal state, the pin column 205 does not protrude out of the through hole 204, and the ball seat 202 can rotate freely, in the locking state, the end of the pin column 205 protrudes out of the through hole 204 and is inserted into the limiting groove 206, at this time, the two ends of the pin column 205 are fitted with the through hole 204 and the limiting groove 206 respectively, thereby limiting the rolling between the spherical groove seat 201 and the ball seat 202.

[0046] The side of the connecting plate 304 is provided with an auxiliary linkage protection mechanism, the auxiliary linkage protection mechanism includes a limiting column 306, the limiting column 306 is arranged on the side of the connecting plate 304 close to the ball joint assembly 2, a limiting seat 307 is movably sleeved on the limiting column 306, the limiting seat 307 is provided with a guide rod 309 through an end seat 308, the guide rod 309 extends into the connecting rod 203 through the fixed seat 301 on one side, the end of the guide rod 309 is provided with a piston 310 which is slidably fitted with the inner wall of the connecting rod 203, and the outer part of the guide rod 309 is sleeved with a stretching spring 311.

[0047] Specifically, in the initial state, the stretching spring 311 is stretched to be in the energy storage state, the limiting seat 307 positions the end of the guide rod 309 by being sleeved on the limiting column 306, and under the normal tension, the up and down movement of the limiting column 306 will not separate from the limiting seat 307.

[0048] In use, the two movable seats 303 move towards each other due to the increase of the tension force, causing the end of the sliding rod 318 to be separated from the hinged seat 312, and the limiting column 306 to move downwards and be separated from the limiting seat 307 at the same time, at this time, the stretched extension spring 311 quickly contracts and resets, and drives the end seat 308 to move towards the ball seat 202, so that the guide rod 309 drives the piston 310 to quickly move towards the inside of the ball seat 202, the sliding of the piston 310 pushes the gas into the ball seat 202, so that the pressure in the ball seat 202 increases, thereby pushing the pin column 205 in the through hole 204 to slide towards the outside of the ball seat 202, so that the end of the pin column 205 extends out of the through hole 204 and is inserted into the limiting groove 206, thereby limiting the ball seat 202 and the spherical groove seat 201, further limiting the rolling between the ball seat 202 and the spherical groove seat 201, thereby effectively inhibiting the swinging of the cable 401, and ensuring the stability of the tower body 1 structure, the insulator string 104 structure and the cable 401 fixing structure.

[0049] The application further discloses a power transmission line tower system, which comprises at least one above-mentioned drilling tower and a plurality of conventional power transmission towers, and the drilling tower and the conventional power transmission towers are connected through the cable 401.

[0050] In addition, the above-mentioned tower foundation adopts multi-head water mill drill for drilling construction in construction, and in construction, the multi-head water mill drill adopts a pit support or a crawler type chassis, three 120mm caliber water mill drill heads are fixed on a rotatable integrated support at the same horizontal plane, each water mill drill head is assisted by a water supply port, power supply is adopted, the three water mill drills work simultaneously to drill holes, the drilling depth is about 700mm, after the drilling is completed, the operation rotates the rotatable integrated support clockwise to perform drilling of the next group, until the outer diameter drilling is completed.

[0051] After the outer diameter drilling is completed, a construction worker takes out the outer diameter rock core through a special pliers, a foundation pit forms an outer diameter concentric circle with a width of about 200mm, a hydraulic core breaker is placed on one side of the concentric circle, and the central rock mass is expanded to integral fracture through the transverse expansion force of the hydraulic core breaker, the central rock mass is about 900mm in diameter and 700mm in height after the fracture, and the weight of the central rock mass is about 1.5-2 tons according to different lithology.

[0052] After the hydraulic core breaker is withdrawn, a hoisting device is a sling with an expansion quick-release buckle structure, the sling is placed into the central hole, and the device hoists the central rock mass to the outside of the pit.

[0053] A worker goes down into the pit to level the pit bottom, after the pit bottom is leveled, drilling and coring of the central hole are performed at the pit opening, and thus the foundation pit excavation work of a section with a depth of about 400mm is completed, the water mill drill array is recycled to perform construction on the next section, until the design depth.

[0054] The above merely illustrates the embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, which is made according to the content of the present application, shall be included in the patent protection scope of the present application.

Claims

1. A transmission line tunnel tower, comprising a tower body (1), wherein a crossarm (101) is provided at the top of the tower body (1), and grounding frames (102) are provided on both sides of the top of the crossarm (101), characterized in that, The crossarm (101) has insulator strings (104) attached to its middle and end via hangers (103). The end of the insulator string (104) is provided with a ball joint assembly (2), the end of the ball joint assembly (2) is provided with a buffer assembly (3), and the end of the buffer assembly (3) is provided with a fixing hardware (4). The ball joint assembly (2) includes a spherical groove seat (201), a ball seat (202) is rolled in the spherical groove seat (201), and a connecting rod (203) is provided on the side of the ball seat (202). The buffer assembly (3) includes a fixed seat (301), two fixed seats (301) are provided, and each fixed seat (301) has a connecting rod (302) hinged at both ends. A movable seat (303) is hinged between the two opposite connecting rods (302). A connecting plate (304) is provided alternately between the movable seats (303) on both sides, and a buffer spring (305) is provided between the two connecting plates (304). A hinge seat (312) is provided on the fixed seat (301) away from the ball joint assembly (2), and the end of the hinge seat (312) is rotatably connected to the back side of the fixed hardware (4). An auxiliary linkage protection mechanism is provided between the ball receiving assembly (2) and the buffer assembly (3), and a main linkage protection mechanism is provided between the buffer assembly (3) and the fixing hardware (4); The auxiliary linkage protection mechanism includes a limiting post (306), which is located on the side of the connecting plate (304) near the ball joint assembly (2). A limiting seat (307) is movably sleeved on the limiting post (306). The limiting seat (307) is provided with a guide rod (309) through the end seat (308). The guide rod (309) extends through the fixed seat (301) on one side and into the connecting rod (203). The end of the guide rod (309) is provided with a piston (310) that slides with the inner wall of the connecting rod (203). A tension spring (311) is sleeved on the outside of the guide rod (309). The main linkage protection mechanism includes a slide (313) and a positioning seat (316). The slide (313) slides through the surface of the hinge seat (312). A pressure seat (314) is provided on the side of the slide (313). An elastic element (315) is provided between the pressure seat (314) and the surface of the hinge seat (312). The positioning seat (316) is located at the bottom back of the fixing hardware (4). The end of the positioning seat (316) abuts against the side of the slide (313).

2. The transmission line tunneling tower according to claim 1, characterized in that: The fixing hardware (4) has a cable (401) fixed on it. The fixing hardware (4) has a "┌" shaped structure. The inner side of the fixing hardware (4) has an arc-shaped groove that matches the cable (401). The fixing hardware (4) has a U-shaped fastener for fixing the cable (401).

3. The transmission line tunneling tower according to claim 1, characterized in that: The connecting rod (203) passes through the opening on the side of the spherical groove seat (201), and an elastic pad is provided on the opening; The ball seat (202) is a hollow structure, and the connecting rod (203) is a hollow structure that communicates with the ball seat (202).

4. The transmission line tunneling tower according to claim 3, characterized in that: The inner wall of the ball seat (202) is uniformly provided with through holes (204), and a pin (205) is slidably fitted inside the through hole (204). The inner wall of the spherical groove seat (201) is uniformly provided with limiting grooves (206).

5. The transmission line tunneling tower according to claim 1, characterized in that: A fixing seat (301) near the ball joint assembly (2) is located at the end of the connecting rod (203), and connecting rods (302) on both fixing seats (301) are arranged opposite to each other. The connecting plate (304) has an L-shaped structure.

6. The transmission line tunneling tower according to claim 1, characterized in that: The surface of the hinge seat (312) is provided with a support (317), and a slide rod (318) slides through the side of the support (317). The slide rod (318) passes through the side of the slide seat (313). A baffle (319) is provided on the slide rod (318). A limiting spring (320) is sleeved on the slide rod (318) between the baffle (319) and the support (317). The main linkage protection mechanism also includes a stop (321). The stop (321) is provided on the movable seat (303), and the stop (321) abuts against the end of the slide rod (318).

7. A transmission line tower system, characterized in that, The transmission line tower system includes a transmission line tunnel tower as described in any one of claims 1-6, and also includes several conventional transmission towers, with the tunnel tower and the conventional transmission towers connected by a cable (401).

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