A high voltage overhead steel structure for power transmission and transformation construction

Abstract

The present invention relates to the technical field of power transmission tower technology, and specifically to a high-voltage overhead steel structure used for power transmission and transformation construction, comprising a cross arm, a slide bar, a buffer spring and a gravity plate. The slide bar is horizontally and symmetrically slidably installed on the cross arm, one end of the slide bar is connected to the cross arm through a buffer spring, and the other end of the slide bar is sequentially connected to a power transmission line and an insulator through a rotating block. A limit groove is provided at the lower end of the slide bar, a cylinder is installed on the cross arm, a limit pin is coaxially slidably installed in the cylinder, the upper end of the limit pin is slidably connected to the limit groove, the lower end of the limit pin is connected to a gravity component, and the gravity component is connected to the gravity plate. The present invention controls the limit pin and the limit groove to separate or overlap by utilizing the change in the weight of the gravity plate in a low temperature environment, so that the buffer spring buffers the pulling force generated by the swing of the power transmission line, thereby ensuring the safety of the power transmission line.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission tower technology, and in particular to a high-voltage overhead steel structure used for power transmission and transformation construction. Background Art

[0002] The tension tower is a specially designed tower structure in the power line. It divides the straight section of the line into several tension sections. The tension tower bears the tension of the transmission line to ensure the stable operation of the line. Its structure includes a sturdy tower body, an insulator string, a tension clamp to connect the transmission line, connecting hardware, guy wires or a stable tower foundation. The transmission line is connected to the connecting frame at the top of the tower through an insulator string and connecting hardware. In windy weather, the transmission line will swing, causing the connecting hardware and the connecting frame to deviate and wear at an angle, and the connection strength will decrease, leading to the problem of breakage.

[0003] In view of the above problems, the prior art provides a solution. For example, patent application number CN202410302069.3 provides a tension-resistant transmission tower. The patent provides a solution including a support rod, a symmetrical connecting frame fixedly connected to the top of the support rod, a symmetrical sliding rod slidably connected to the connecting frame, a limiting plate is installed on the first end and the middle of the sliding rod, the limiting plate in the middle of the sliding rod is limited and matched with the adjacent connecting frame, the second end of the sliding rod is rotatably connected to a rotating member, a buffer spring is fixedly connected between the limiting plate at the first end of the sliding rod and the adjacent connecting frame, the rotating member is hinged with an insulator string, the insulator is hinged with a symmetrical connecting plate, and trapezoidal insulators are hinged together between the symmetrical connecting plates. The present invention detects the air flow velocity in the air environment through three hemispherical shells on the rotating shaft. When When the set wind speed is reached, the restriction of the first limit column on the mounting plate on the adjacent fixed rod is released, so that the tension generated by the swing of the transmission line is buffered by the buffer spring to prevent the tension generated by the transmission line from directly acting on the connecting frame, resulting in a break at the connection between the transmission line and the connecting frame or in the middle of the transmission line. However, frost will condense on the transmission line in a low temperature environment, and the frost will increase the weight of the transmission line and increase the inertia. Under the continuous action of the breeze, the tension generated by the swing of the transmission line increases. At this time, the wind speed cannot trigger the separation of the first limit block and the through hole of the fixed rod, the restriction of the mounting plate is not released, and the buffer spring cannot buffer the tension generated by the swing of the transmission line. The generated tension acts directly on the connecting frame. When the generated tension is greater than the bearing capacity of the connecting frame, it will still cause the connection between the transmission line and the connecting frame or the middle of the transmission line to be easily broken. Summary of the invention

[0004] The purpose of the present invention is to provide a high-voltage overhead steel structure for power transmission and transformation construction, so as to solve the problem in the prior art that frost condenses on the transmission lines in a low temperature environment and increases their weight, causing the transmission lines to swing under the action of a breeze and generate increased tension. At this time, the wind speed cannot release the restriction of the mounting plate, and the buffer spring cannot buffer the tension generated by the swing of the transmission line, resulting in the connection between the transmission line and the connecting frame or the middle of the transmission line being easily broken.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-voltage overhead steel structure used for power transmission and transformation construction, comprising a support frame, a cross arm, a slide bar, a buffer spring, a drive mechanism and a gravity plate, wherein the support frame is horizontally symmetrically provided with a cross arm, and the cross arm is horizontally symmetrically provided with a slide bar for sliding installation, one end of the slide bar is connected to the cross arm via a buffer spring, and the other end of the slide bar is connected to a transmission line and an insulator in sequence via a rotating block, and a drive mechanism is rotatably provided on the rotating block, and the drive mechanism uses gas flow as power to rotate and squeeze air, thereby providing high-pressure airflow to the outside.

[0007] Specifically, a limit groove is provided at the lower end of the slide rod, a cylinder is installed on the cross arm, a limit pin is coaxially slidably installed in the cylinder, the upper end of the limit pin is slidably connected to the limit groove, a valve ring is provided on the limit pin, the valve ring is located in the cylinder, the valve ring and the inner wall of the cylinder form a closed space, and the space is connected to the output end of the driving mechanism, the lower end of the limit pin is connected to a gravity component, the gravity component is connected to the gravity plate, and the gravity component drives the limit pin to separate from the limit groove through the gravity change on the gravity plate.

[0008] It is easy to understand that the transmission line, insulator, rotating block and sliding rod are connected in sequence, the sliding rod is slidably installed on the cross arm, the sliding rod and the cross arm are connected by a buffer spring, and the cross arm is fixedly installed on the support frame. When the transmission line is in a low temperature environment, frost will condense, and the continuous breeze will increase the tension generated by the swing of the transmission line. At this time, the tension pulls the sliding rod through the insulator and the rotating block, and the sliding rod slides on the cross arm. The elastic force of the buffer spring is used to buffer the tension generated by the swing of the transmission line to prevent the tension generated by the transmission line from directly acting on the connecting frame. When the wind speed is low, the tension generated by the transmission line is not enough to compress the buffer spring, but the tension generated by the transmission line acts on the buffer spring for a long time, causing the buffer spring to fatigue. At this time, the limit pin cooperates with the limit groove on the slide rod to prevent the tension generated by the transmission line from acting on the buffer spring for a long time, causing fatigue of the buffer spring, and at the same time increasing the stability of the slide rod and reducing the relative displacement between the slide rod and the adjacent connecting frame. When the wind speed increases to reach the set value, the driving mechanism uses the gas flow in the air as power to rotate and squeeze the air, thereby providing high-pressure airflow to the outside. At this time, the high-pressure airflow is connected to the cylinder. At this time, the high-pressure airflow in the cylinder pushes the valve ring to move, and the valve ring drives the limit pin to disengage from the limit groove. At this time, the restriction of the slide rod is released, and the elastic force of the buffer spring buffers the tension generated by the swing of the transmission line, preventing the tension generated by the transmission line from directly acting on the connecting frame.

[0009] Furthermore, when the transmission line is in a low temperature environment, frost will condense on the transmission line and its weight will increase. Under the action of a breeze, the tension generated by the swinging of the transmission line will increase. At the same time, the wind speed cannot release the restriction of the sliding rod, and the buffer spring cannot buffer the tension generated by the swinging of the transmission line. At this time, frost will condense on the surface of the gravity plate due to its low temperature environment, and its weight will increase. The gravity assembly separates the limit pin and the limit groove through the increase in the weight of the gravity plate, thereby avoiding the increase in tension generated by the swinging of the frosted transmission line under the action of a breeze. At the same time, the wind speed cannot release the restriction of the sliding rod, and the buffer spring cannot buffer the tension generated by the swinging of the transmission line, thereby ensuring the safety of the transmission line.

[0010] Preferably, the gravity assembly includes a sliding pin, a retaining ring, a No. 1 spring and a No. 2 spring, the sliding pin is coaxially arranged in the cylinder, the sliding pin is located below the valve ring, the sliding pin includes a sliding part and a supporting part, the supporting part is located at the upper end of the sliding part, the sliding part is slidably connected to the limit pin, the limit pin passes through the sliding part, one end of the sliding part passes through the cylinder and is slidably connected to the gravity plate, the gravity plate is fixed to the lower end surface of the cylinder by the sliding pin, the gravity plate is horizontally arranged, a No. 2 spring is coaxially mounted on the sliding part, two ends of the No. 2 spring are respectively connected to the supporting part and the inner wall of the lower end of the cylinder, the retaining ring is coaxially mounted in the cylinder, the retaining ring is located below the supporting part, the inner diameter of the retaining ring is smaller than the outer diameter of the supporting part, the retaining ring is made of elastic material, a No. 1 spring is coaxially arranged in the cylinder, and two ends of the No. 1 spring are respectively connected to the valve ring and the inner wall of the upper end of the cylinder.

[0011] When the weight of the gravity plate increases due to frost condensing on the surface of the gravity plate in a low temperature environment, the gravity plate drives the sliding pin to slide downward on the limit pin under the action of gravity. At this time, the support part on the sliding pin compresses the No. 2 spring downward. As it continues to move downward, when the lower end face of the support part contacts the upper end face of the clamping ring, the clamping ring prevents the sliding pin and the gravity plate from moving downward. Since the clamping ring is made of styrene-butadiene rubber, it has good elasticity, strong elastic recovery ability, and is wear-resistant and aging-resistant. When the frost condensed on the gravity plate reaches a certain weight, the clamping ring undergoes elastic deformation. At this time, the restriction on the sliding pin is released, and the gravity plate and the sliding pin continue to descend. In the process, the limit pin is driven downward, and then the limit pin is driven to separate from the sliding rod. By utilizing the gravity change of the gravity plate to release the restriction on the sliding rod, the elastic force of the buffer spring buffers the tension generated by the swing of the transmission line, thereby preventing the tension generated by the transmission line from directly acting on the connecting frame, thereby ensuring the safety of the transmission line.

[0012] Furthermore, since the No. 2 spring is compressed and the No. 1 spring is stretched by the valve ring during the downward sliding process of the limit pin, when the frost on the gravity plate melts or is cleaned, the elastic potential energy of the No. 2 spring is released to push the gravity plate and the sliding pin to reset. When the frost on the gravity plate melts or is cleaned and the driving mechanism is not triggered, the elastic potential energy of the No. 1 spring is released to pull the limit pin to reset. The limit pin, gravity plate and sliding pin are reset by releasing the elastic potential energy of the No. 1 and No. 2 springs.

[0013] Furthermore, since the limit pin is slidably connected to the gravity plate and the sliding pin, the limit pin can move freely under the drive of the driving mechanism when there is wind but no frost condensation. Through the cooperation of the gravity plate and the gravity assembly and the drive of the driving mechanism, it can adapt to a variety of different environments and improve the reliability of the equipment.

[0014] Preferably, the cylinder is connected to the cross arm through a connecting rod, and the connecting rod includes a connecting part, an impact part and a vibrating part. One side of the connecting part is connected to the cross arm, and the other side of the connecting part is connected to multiple vibrating parts and the cylinder. The vibrating part is evenly distributed in an annular shape on the end surface of the connecting part, and the vibrating part is clearance-matched with the connecting part in the radial direction. An impact part is provided on the far end of the vibrating part, and the impact part is located between the connecting part and the vibrating part.

[0015] In low temperature environments, workers will regularly knock and remove frost from the transmission lines and equipment in the transmission lines to avoid dangerous situations caused by the accumulation of rain and snow on the transmission lines. In low temperature environments, frost will also condense between the gravity plates, limit pins and the surfaces and connections of the gravity components. The frost will affect the operation of the above-mentioned components, making it impossible to reset the limit pins, and then the restrictions on the slide bars cannot be released and reset in time. The tension generated by the restricted transmission lines acts on the buffer springs for a long time, causing fatigue damage to the buffer springs. Therefore, during manual regular cleaning, the crossarms are knocked to transmit the vibration of the crossarms to the equipment through the connecting rods, and the frost on the surface of the equipment is removed by vibration. When the vibration is transmitted to the connecting rods, part of the vibration of the crossarms is transmitted to the vibration part when passing through the connection part, and the vibration part swings. Since the radial cross-sectional area of ​​the vibrating part is smaller than that of the connecting part, the vibration amplitude of the vibrating part is larger at this time, and the swing of the vibrating part drives the impact part at the end to impact the adjacent connecting part. Under the action of the same vibration source, the frequency of the vibrating part is the same as the frequency of the connecting part. At this time, resonance occurs in the equipment, and the vibration of the worker knocking on the crossarm is directly transmitted to the connecting part and the knocking of the knocking part by the vibrating part is driven to achieve resonance cleaning of condensed frost on the surface of the upper gravity plate, the limit pin and the gravity component and the connection, so as to prevent frost from affecting the operation of the above-mentioned components, making the limit pin unable to be reset, and the sliding rod unable to be reset and restricted in time. The tension generated by the transmission line acts on the buffer spring for a long time, causing fatigue damage to the buffer spring, thereby ensuring the service life of the buffer spring.

[0016] Preferably, the gravity plate and the sliding pin are loosely matched, the gravity plate includes a supporting section and a connecting section, the lower end face of the connecting section where the sliding pin is matched is provided with a rectangular groove, the supporting section is fan-shaped, the small diameter end of the supporting part is connected to the connecting section, the lower end face of the sliding part is connected with a sliding block, the rectangular groove and the sliding block are loosely matched, and the inner wall of the rectangular groove and the side wall of the sliding block are staggered with multiple arc-shaped bosses along the radial direction of the connecting rod.

[0017] When cleaning the condensed frost on the gravity plate, limit pin and the surface and connection between the gravity component, although the condensed frost on the gravity plate is separated from the plate surface, due to the horizontal arrangement of the gravity plate and the small vibration amplitude on the gravity plate, the frost in the center of the gravity plate cannot be removed in time. When the worker knocks and cleans the frost on the transmission line, the limit pin needs to be reset to limit the sliding rod to prevent the tension generated by the transmission line from acting on the buffer spring for a long time. The presence of frost makes it impossible for the No. 2 spring to push the limit pin to reset, causing fatigue of the buffer spring and shortening its service life. Therefore, the gravity plate and the sliding pin are matched with each other, the rectangular groove and the slider are matched with each other, and a plurality of arc bosses are staggered along the axial direction of the connecting rod on the inner wall of the rectangular groove and the side wall of the slider. When the vibration generated by the worker knocking on the crossarm is transmitted to the connecting rod, the vertical vibration of the connecting rod presents a left and right reciprocating motion, which transmits the vibration to the sliding pin through the cylinder and the limit pin, thereby driving the slider in the rectangular groove. The movement of the connecting rod transmits the vibration to the gravity plate through the cylinder, the sliding pin and the limit pin. The fan-shaped design of the support section, the small diameter end of the support part is connected to the connecting section, and the gravity plate support part swings up and down under the action of the up and down vibration and inertia of the gravity plate, and the frost in the center of the gravity plate is thrown away. The vibration generated by the collision between the sliding block and the rectangular groove and the bosses driven by the vibration of the connecting rod acts on the gravity plate, thereby improving the separation of the gravity plate and the condensed frost. At the same time, the vertical movement of the connecting rod is combined with the fan-shaped design of the gravity plate. Under the action of the up and down vibration and inertia of the gravity plate, the gravity plate support part swings up and down to throw away the frost in the center of the gravity plate, thereby avoiding the problem that the frost in the center of the gravity plate affects the reset of the limit pin, causing fatigue of the buffer spring and shortening its service life.

[0018] Preferably, a bending groove is provided on the outer wall of the vibration part, a fixing groove is provided on the lower end surface of the cylinder, the fixing groove is slidably connected to the gravity plate, and the side wall of the fixing groove and the vibration part are made of memory metal.

[0019] When the external environment is at room temperature and there is no frost condensation, the clearance fit between the gravity plate and the sliding pin will vibrate due to the effect of ambient airflow, which will shorten its service life. Therefore, a fixing groove is provided on the lower end face of the cylinder, and the fixing groove is used to cooperate with the side wall of the gravity plate. The side wall of the fixing groove is made of memory metal. When the external environment is in a low temperature environment, the memory metal contracts and forms a clearance fit with the gravity plate, thereby not affecting the activity of the gravity plate. When the external environment is at room temperature, the gravity plate cooperates with the fixing groove under the action of the No. 2 spring and the sliding pin. At this time, the memory metal expands due to heat, squeezes the side wall of the gravity plate, increases the friction between them through pressure, and then locks the gravity plate, thereby avoiding the problem of vibration of the gravity plate due to the effect of ambient airflow, which leads to a shortened service life, thereby improving its service life.

[0020] At the same time, the crossarm will vibrate due to the action of ambient airflow, and the vibration will be transmitted to the gravity plate, limit pin and gravity assembly. Long-term vibration will reduce the service life of the gravity plate, limit pin and gravity assembly. The vibration part is made of memory metal, which expands at room temperature, and the radial length of the vibration part increases. At this time, the two ends of the vibration part are in contact with the connecting part and the outer wall of the cylinder respectively. At this time, the vibration part itself expands and is restricted at both ends, and compressive stress is generated in the vibration part itself. The bending groove will change the stress distribution in the vibration part, and the vibration part bends and deforms from the bending groove, and the bent outer wall of the vibration part fits with the connecting part. By setting the material of the vibration part and supporting the cylinder and the connecting part at both ends, the vibration transmission of the crossarm to the gravity plate, limit pin and gravity assembly is reduced. At the same time, the fit of the vibration part and the connecting part compensates for the axial size of the connecting rod, increases the radial vibration resistance of the connecting rod, reduces the amplitude and duration of vibration, and thus improves the service life of the force plate, limit pin and gravity assembly.

[0021] Preferably, a guide rod No. 1 is connected between the cross arms, and the limit pin includes a stroke part and a limit part. The limit pin is in a horn shape, and the upper part of the limit pin is the limit part, which cooperates with the limit groove. The limit part is located directly above the guide rod No. 1, and the stroke part is slidably installed in the cylinder. A matching groove is provided on the lower end surface of the stroke part. A ring sleeve is connected to the power transmission line, and a guide pin is provided on the ring sleeve. The guide pin is vertically upward, and the axis is colinear with the center of the matching groove.

[0022] In some plateau environments, it is dangerous to manually knock away frost. In the prior art, the high voltage in the transmission line is turned off, a direct current is input into the transmission line, and a short circuit is performed to generate heat. The transmission line is used to generate heat to melt the frost to avoid damage to the transmission line. However, in the prior art, only the transmission line is cleaned, and the frost on the gravity plate is not cleaned. At this time, the limit pin and the slide bar are in a separated state. The tension generated by the transmission line acts on the buffer spring for a long time, causing fatigue of the buffer spring and shortening its service life. Therefore, a No. 1 guide rod is connected between the cross arms, and the transmission line is fixed to the guide pin by a ring. When the weight of the gravity plate increases, the limit pin is separated from the slide bar, and the limit pin slides downward at the same time. At this time, the lower end face of the limit part of the limit pin contacts the No. 1 guide rod. When the slide bar restriction is released, the transmission line is stretched to both ends. At this time, under the cross arm The corresponding part of the transmission line is tightened from the original relaxation. At this time, this part of the transmission line moves upward as a whole, thereby driving the guide pin to move upward and contacting with the matching groove on the lower end face of the stroke part. At this time, the high voltage in the transmission line is turned off, and DC current is input into the transmission line. The current will flow to the limit pin through the guide pin, and then pass through the No. 1 guide rod to the limit pin on the adjacent side and then return to the transmission line through the guide pin. When short-circuiting, the limit pin generates heat, and the heat is conducted to the gravity plate, and the frost on the gravity plate is heated and removed. The frost on the gravity plate is removed by powering on and short-circuiting, so as to avoid the frost on the gravity plate not being cleaned during heat treatment, and the limit pin cannot be reset, so that the tension generated by the transmission line acts on the buffer spring for a long time, causing fatigue of the buffer spring and shortening its service life, thereby ensuring the service life of the buffer spring.

[0023] Further, when the frost on the gravity plate is cleared, the No. 2 spring drives the gravity plate to reset. At this time, the No. 1 guide rod is separated from the limit pin. At this time, the current flows through the corresponding transmission line under the crossarm and heats and cleans the condensed frost.

[0024] Preferably, the guide pin includes a ejector pin, a hinge and a support ring, the upper end of the support ring is annularly connected with a plurality of hinges, an ejector pin is coaxially slidably installed in the support ring, the top of the ejector pin is conical, the lower end of the support ring is connected to the ring sleeve, the lower end of the ejector pin is slidably connected to the power transmission line, the hinge is made of elastic material, and the sides of adjacent hinges fit together.

[0025] Since the guide pin is pointing upward vertically, frost will condense on the upper end surface of the guide pin, and frost will also condense in the matching groove on the lower end surface of the limit pin, which will hinder the docking of the guide pin and the matching groove, and thus the frost on the gravity plate cannot be cleaned. Therefore, a plurality of hinges are connected in an annular manner at the upper end of the support ring, and a ejector pin is coaxially slidably installed in the support ring. When the power transmission line corresponding to the guide pin installation position is tightened, the guide pin is tightened from a bent state. During the process, the motion trajectory of the power transmission line corresponding to the guide pin installation position moves from bottom to top. At the same time, since the guide pin is located above the power transmission line, the ejector pin and the power transmission line are closely connected. The wires are connected. At this time, the transmission line pushes the ejector pin to move upward in the support ring. The ejector pin pushes open the hinge, and the frost on the hinge is pushed open. At this time, the ejector pin continues to move upward to dock with the matching groove. The conical design of the upper part of the ejector pin breaks the frost in the matching groove, and the frost is separated from the matching groove under the action of gravity. Then, the transmission line is electrically connected to the limit pin through the ejector pin. The frost in the guide pin and the matching groove is cleaned by utilizing the position edge when the transmission line is stretched and tightened, so as to avoid the frost hindering the docking of the guide pin and the matching groove, and thus the frost on the gravity plate cannot be cleaned.

[0026] Preferably, fixing plates are evenly distributed vertically in the cylinder, the radial spacing of the fixing plates is greater than the outer diameter of the supporting portion, the lower end surface of the fixing plate is in contact with the retaining ring, a deformation groove is provided on the inner side of the fixing plate, the fixing plate is made of a flexible material, and the deformation groove is located between the upper end surface of the retaining ring and the lower end surface of the supporting portion.

[0027] When the ambient temperature is at room temperature and there is airflow in the air, the driving assembly drives the limit pin to separate from the slide rod. When the slide rod moves downward, the valve ring is driven downward. During the process, the lower end face of the valve ring squeezes the upper end face of the fixed plate. Since the fixed plate is made of rubber, it has elasticity and good wear resistance. At the same time, since a deformation groove is opened on the inner side of the fixed plate, the stress in the fixed plate is destroyed by the deformation groove during the extrusion process. The fixed plate is deformed at the deformation groove. Due to the limitation of the inner wall of the cylinder, the deformation direction is guided to the cylinder axis. At this time, the inner ring size of the fixed ring is reduced. The spacing between the inner walls of the fixed plate is smaller than the outer diameter of the supporting part, and the deformation groove is located between the upper end face of the clamping ring and the lower end face of the supporting part. At this time, the fixed plate at the deformed position fits with the lower end face of the supporting part of the sliding pin, thereby fixing the sliding pin, thereby restricting the gravity plate, and deforming the fixed plate by utilizing the downward force of the limit pin, thereby fixing the gravity plate, avoiding accidental contact of the gravity plate and the gravity assembly under normal temperature environment, and at the same time, fixing the gravity plate and the gravity assembly to avoid vibration caused by the influence of external airflow, thereby ensuring the service life of the gravity plate and the gravity assembly.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention cooperates with the gravity assembly and the gravity plate. In a low temperature environment, frost will condense on the gravity plate, and the weight of the gravity plate will change. The gravity assembly controls the separation or overlap of the limit pin and the limit groove through the change of the weight of the gravity plate, and avoids the increase of tension caused by the swing of the frosted transmission line under the action of breeze. At the same time, the wind speed cannot release the limitation of the sliding rod, and the buffer spring cannot buffer the tension caused by the swing of the transmission line, thereby ensuring the safety of the transmission line.

[0030] 2. The present invention uses the cooperation between the connecting rod, the gravity plate and the sliding pin. A worker knocks on the crossarm to make it vibrate. Vibration is generated by direct vibration transmission and the knocking of the knocking part driven by the vibrating part, and the collision between the slider and the rectangular groove and between the bosses, thereby resonating and cleaning the condensed frost on the surface and connection of the gravity plate, the limit pin and the gravity component. At the same time, the vertical movement of the connecting rod is combined with the fan-shaped design of the gravity plate to throw away the frost in the center of the gravity plate, so as to prevent the frost in the center of the gravity plate from affecting the resetting of the limit pin and causing fatigue of the buffer spring.

[0031] 3. The present invention cooperates with the limit pin, the No. 1 guide rod and the guide needle, and utilizes the displacement of the power transmission line when the slide bar is unlocked, so that the limit pin, the No. 1 guide rod and the guide needle are electrically connected, and energized to short-circuit to remove frost on the gravity plate, thereby avoiding the situation in which the frost on the gravity plate is not cleaned during heat treatment, the limit pin cannot be reset, and the tension generated by the power transmission line acts on the buffer spring for a long time, causing fatigue of the buffer spring and shortening its service life, thereby ensuring the service life of the buffer spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the high-voltage overhead steel structure used for power transmission and transformation construction of the present invention;

[0033] Figure 2 For the present invention Figure 1 A partial enlarged view of the state where the limit pin at A in the middle releases the restriction on the slide rod;

[0034] Figure 3 For the present invention Figure 1 A partial enlarged view of the limit pin at A in the middle restricting the slide bar;

[0035] Figure 4 It is a structural cross-sectional view of the cylinder and the gravity assembly in the present invention;

[0036] Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle;

[0037] Figure 6 For the present invention Figure 4 A partial enlarged view of point C in the middle;

[0038] Figure 7 For the present invention Figure 4 A partial enlarged view of point D in the middle;

[0039] Figure 8 is an axial cross-sectional view of the guide needle of the present invention;

[0040] Fig. 9 It is an axial view of the gravity plate in the present invention.

[0041] In the figure: 1, support frame; 11, cross arm; 12, slide bar; 121, limit groove; 13, buffer spring; 14, rotating block; 15, transmission line; 16, insulator; 17, driving mechanism; 2, cylinder; 21, valve ring; 22, sliding pin; 221, sliding part; 222, supporting part; 224, slider; 2241, boss; 23, snap ring; 24, fixing groove; 25, fixing plate; 251, deformation groove; 3. Limit pin; 31. Travel part; 32. Limit part; 33. Matching groove; 4. Gravity plate; 41. Support section; 42. Connecting section; 421. Rectangular groove; 5. Spring No. 2; 6. Spring No. 1; 7. Connecting rod; 71. Connecting part; 72. Impact part; 73. Vibrating part; 731. Bending groove; 8. Guide rod No. 1; 9. Ring sleeve; 91. Guide pin; 911. Ejector pin; 912. Hinge; 913. Support ring. DETAILED DESCRIPTION

[0042] See also Figures 1 to 9 The present invention provides a high-voltage overhead steel structure for power transmission and transformation construction, and the technical solution is as follows:

[0043] A high-voltage overhead steel structure for power transmission and transformation construction includes a support frame 1, a cross arm 11, a slide bar 12, a buffer spring 13, a drive mechanism 17 and a gravity plate 4. The support frame 1 is horizontally symmetrically installed with a cross arm 11, and the slide bar 12 is horizontally symmetrically slidably installed on the cross arm 11. One end of the slide bar 12 is connected to the cross arm 11 through a buffer spring 13, and the other end of the slide bar 12 is connected to a transmission line 15 and an insulator 16 in sequence through a rotating block 14. A drive mechanism 17 is rotatably installed on the rotating block 14. The drive mechanism 17 uses gas flow as power to rotate to squeeze the air, thereby It provides high-pressure airflow to the outside, and is characterized in that a limit groove 121 is provided at the lower end of the slide rod 12, a cylinder 2 is installed on the cross arm 11, a limit pin 3 is coaxially slidably installed in the cylinder 2, the upper end of the limit pin 3 is slidably connected to the limit groove 121, a valve ring 21 is provided on the limit pin 3, the valve ring 21 is located in the cylinder 2, the valve ring 21 and the inner wall of the cylinder 2 form a closed space, and are connected to the output end of the driving mechanism 17, a gravity component is connected to the lower end of the limit pin 3, the gravity component is connected to the gravity plate 4, and the gravity component drives the limit pin 3 to separate from the limit groove 121 through the gravity change on the gravity plate 4.

[0044] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 The gravity assembly includes a sliding pin 22, a retaining ring 23, a No. 1 spring 6 and a No. 2 spring 5. The sliding pin 22 is coaxially arranged in the cylinder 2. The sliding pin 22 is located below the valve ring 21. The sliding pin 22 includes a sliding portion 221 and a supporting portion 222. The supporting portion 222 is located at the upper end of the sliding portion 221. The sliding portion 221 is slidably connected to the limit pin 3. The limit pin 3 passes through the sliding portion 221. One end of the sliding portion 221 passes through the cylinder 2 and is slidably connected to the gravity plate 4. The gravity plate 4 is fixed to the lower end surface of the cylinder 2 by the sliding pin 22. The gravity plate 4 is arranged horizontally. A second spring 5 is coaxially installed on the sliding part 221. The two ends of the second spring 5 are respectively connected to the support part 222 and the inner wall of the lower end of the cylinder 2. The snap ring 23 is coaxially installed in the cylinder 2. The snap ring 23 is located below the support part 222. The inner diameter of the snap ring 23 is smaller than the outer diameter of the support part 222. The snap ring 23 is made of elastic material. The cylinder 2 is vertically and evenly distributed with fixed plates 2 5. The radial spacing of the fixing plate 25 is greater than the outer diameter of the support portion 222. The lower end surface of the fixing plate 25 is in contact with the clamping ring 23. A deformation groove 251 is provided on the inner side of the fixing plate 25. The fixing plate 25 is made of rubber. The deformation groove 251 is located between the upper end surface of the clamping ring 23 and the lower end surface of the support portion 222. A spring 6 is coaxially arranged in the cylinder 2. The two ends of the spring 6 are respectively connected to the valve ring 21 and the inner wall of the upper end of the cylinder 2. The gravity plate 4 and the sliding pin 22 are in clearance. The gravity plate 4 includes a supporting section 41 and a connecting section 42. A rectangular groove 421 is provided on the lower end surface of the connecting section 42 where it cooperates with the sliding pin 22. The supporting section 41 is fan-shaped. The small diameter end of the supporting portion 222 is connected to the connecting section 42. A sliding block 224 is connected to the lower end surface of the sliding portion 221. The rectangular groove 421 and the sliding block 224 are clearance-matched. A plurality of arc-shaped bosses 2241 are alternately arranged on the inner wall of the rectangular groove 421 and the side wall of the sliding block 224 along the radial direction of the connecting rod 7.

[0045] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 The cylinder 2 is connected to the cross arm 11 through the connecting rod 7. The connecting rod 7 includes a connecting portion 71, an impact portion 72 and a vibrating portion 73. One side of the connecting portion 71 is connected to the cross arm 11, and the other side of the connecting portion 71 is connected to multiple vibrating portions 73 and the cylinder 2. The vibrating portions 73 are evenly distributed on the end surface of the connecting portion 71 in an annular manner. The vibrating portions 73 are clearance-matched with the connecting portion 71 in the radial direction. An impact portion 72 is provided on the far end of the vibrating portion 73. The impact portion 72 is located between the connecting portion 71 and the vibrating portion 73. A bending groove 731 is provided on the outer wall of the vibrating portion 73. A fixing groove 24 is opened on the lower end surface of the cylinder 2. The fixing groove 24 is slidably connected to the gravity plate 4. The side wall of the fixing groove 24 and the vibrating portion 73 are made of memory metal.

[0046] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 A guide rod 8 is connected between the cross arm 11, and the limit pin 3 includes a travel portion 31 and a limit portion 32. The limit pin 3 is in a horn shape. The upper part of the limit pin 3 is the limit portion 32, and the limit portion 32 cooperates with the limit groove 121. The limit portion 32 is located directly above the guide rod 8. The travel portion 31 is slidably installed in the cylinder 2, and a matching groove 33 is provided on the lower end surface of the travel portion 31. A ring sleeve 9 is connected to the transmission line 15, and a guide pin 91 is provided on the ring sleeve 9. The guide pin 91 is vertically upward. , and the axis is colinear with the center of the matching groove 33; the guide pin 91 includes a pin 911, a hinge 912 and a support ring 913, the upper end of the support ring 913 is annularly connected with multiple hinges 912, and the pin 911 is coaxially slidably installed in the support ring 913. The top of the pin 911 is conical, the lower end of the support ring 913 is connected to the ring sleeve 9, and the lower end of the pin 911 is slidably connected to the power transmission line 15. The hinge 912 is made of elastic material, and the sides of adjacent hinges 912 fit together.

[0047] Working principle: the transmission line 15, the insulator 16, the rotating block 14 and the slide bar 12 are connected in sequence, the slide bar 12 is slidably installed on the cross arm 11, the slide bar 12 and the cross arm 11 are connected by the buffer spring 13, and the cross arm 11 is fixedly installed on the support frame 1. When the external environment is at room temperature, the gas in the air flows, and the wind speed is low, the limit pin 3 cooperates with the limit groove 121 on the slide bar 12, thereby preventing the tension generated by the transmission line 15 from acting on the buffer spring 13 for a long time, causing the buffer spring 13 to produce Fatigue, when the wind speed increases and reaches the set value, the driving mechanism 17 uses the gas flow in the air as power to rotate and squeeze the air, thereby providing high-pressure airflow outward. At this time, the high-pressure airflow is connected to the cylinder 2, and the high-pressure airflow in the cylinder 2 pushes the valve ring 21 to move downward. During the downward movement of the valve ring 21, the No. 1 spring 6 is stretched. During the movement of the valve ring 21, the limit pin 3 is driven to disengage from the limit groove 121. At this time, the restriction of the slide rod 12 is released, and the elastic force of the buffer spring 13 buffers the tension generated by the swing of the transmission line 15 to prevent the tension generated by the transmission line 15 from directly acting on the connecting frame. When the external ambient air stops flowing, the elastic potential energy of the No. 1 spring 6 is released to reset the sliding pin 22. When the external environment is at room temperature, the gravity plate 4 cooperates with the fixed groove 24 under the action of the No. 2 spring 5 and the sliding pin 22. At this time, the memory metal expands due to heat and squeezes the side wall of the gravity plate 4. The friction between them is increased by pressure, and then the gravity plate 4 is locked to prevent the gravity plate 4 from being affected by the ambient airflow. Vibration, at the same time, the vibration part 73 is made of memory metal. When the external ambient temperature is greater than 0 degrees Celsius, the memory metal expands, and the radial length of the vibration part 73 increases. At this time, the two ends of the vibration part 73 are respectively in contact with the connecting part 71 and the outer wall of the cylinder 2. At this time, the vibration part 73 expands itself and is restricted at both ends. The vibration part 73 itself generates compressive stress, and the bending groove 731 changes the stress distribution in the vibration part 73. The vibration part 73 bends and deforms from the bending groove 731, and the bent outer wall of the vibration part 73 fits with the connecting part 71.

[0048] When the external environment is below 0 degrees Celsius, the memory metal contracts and forms a gap with the gravity plate 4, thereby not affecting the movement of the gravity plate 4. Frost will condense on the transmission line 15 in a low-temperature environment and its weight will increase. At this time, frost will condense on the surface of the gravity plate 4 due to its low-temperature environment and its weight will increase. Under the action of gravity, the gravity plate 4 drives the sliding pin 22 to slide downward on the limit pin 3. At this time, the support part 222 on the sliding pin 22 compresses the second spring 5 downward. As it continues to move downward, when the lower end face of the support part 222 contacts the upper end face of the snap ring 23, the snap ring 23 prevents the sliding pin 22 and the gravity plate 4 from moving downward. When it reaches a certain weight, the retaining ring 23 undergoes elastic deformation. At this time, the restriction on the sliding pin 22 is released, and the gravity plate 4 and the sliding pin 22 continue to descend. In the process, the limit pin 3 is driven to move downward, and then the limit pin 3 is driven to separate from the slide bar 12, thereby avoiding the increase in tension caused by the swinging of the transmission line 15 with condensation of frost under the action of breeze. At the same time, the wind speed cannot release the restriction of the slide bar 12, and the buffer spring 13 cannot buffer the tension caused by the swing of the transmission line 15. When the ice and snow melt or are cleared, the elastic potential energy of the No. 2 spring 5 is released to push the sliding pin 22 to reset, thereby driving the gravity plate 4 to overlap with the fixed groove 24 on the lower end face of the cylinder 2 again.

[0049] Workers will regularly knock on the transmission lines 15 and equipment in the transmission line 15 to remove frost, so as to avoid dangerous situations caused by rain and snow accumulation on the transmission line 15. By knocking on the cross arm 11, the vibration of the cross arm 11 is transmitted to the equipment through the connecting rod 7, and the frost on the surface of the equipment is removed by vibration. When the vibration is transmitted to the connecting rod 7, part of the vibration of the cross arm 11 is transmitted to the vibration part 73 after passing through the connecting part 71, and the vibration part 73 swings. The swing of the vibration part 73 drives the impact part 72 at the end to hit the adjacent connecting part 71. Under the action of the same vibration source, the frequency of the vibration part 73 is the same as the frequency of the connecting part 71. At this time, the equipment resonates. At the same time, the vibration generated by the workers knocking on the cross arm 11 is transmitted to the connecting rod 7. The vertical vibration of the connecting rod 7 presents a left-right reciprocating motion through the air. The cylinder 2 and the limit pin 3 transmit the vibration to the sliding pin 22, thereby driving the slider 224 to move left and right in the rectangular groove 421. During the movement, the staggered bosses 2241 collide, and at the same time, the two ends of the slider 224 collide with the side walls of the rectangular groove 421, causing the gravity plate 4 to vibrate through the collision. At the same time, the vertical vibration of the connecting rod 7 presents an up and down reciprocating motion. The movement of the connecting rod 7 transmits the vibration to the gravity plate 4 through the cylinder 2, the sliding pin 22 and the limit pin 3. The fan-shaped design of the support section 41, the small diameter end of the support part 222 is connected to the connecting section 42. Under the action of the up and down vibration and inertia of the gravity plate 4, the support part 222 of the gravity plate 4 swings up and down, and the frost in the center of the gravity plate 4 is thrown away, thereby realizing the resonance cleaning of the condensed frost between the upper gravity plate 4, the limit pin 3 and the surface and connection of the gravity component.

[0050] When the power transmission system is short-circuited and heated for cleaning, the weight of the gravity plate 4 increases, the limit pin 3 separates from the slide bar 12, and the limit pin 3 slides downward. At this time, the lower end surface of the limit portion 32 of the limit pin 3 contacts the No. 1 guide rod 8. When the restriction of the slide bar 12 is released, the power transmission line 15 is stretched to both ends. At this time, the corresponding part of the power transmission line 15 below the cross arm 11 is tightened from the original relaxation. When the power transmission line 15 corresponding to the installation position of the guide pin 91 is tightened, the guide pin 91 is tightened from the bent state. During the process, the movement trajectory of the power transmission line 15 corresponding to the installation position of the guide pin 91 moves from bottom to top. At the same time, because the guide pin 91 is located above the power transmission line 15, the ejector pin 911 is connected to the power transmission line 15. At this time, the power transmission line 15 pushes the ejector pin 911 in the support ring 913. Moving upward, the ejector pin 911 pushes open the hinge 912, and the frost on the hinge 912 is pushed open. At this time, the ejector pin 911 continues to move upward to dock with the matching groove 33. At this time, the high voltage in the transmission line 15 is turned off, and a direct current is input into the transmission line 15. The current will flow to the limit pin 3 through the guide pin 91, and then pass through the No. 1 guide rod 8 to the limit pin 3 on the adjacent side and then return to the transmission line 15 through the guide pin 91. When a short circuit is performed, the limit pin 3 generates heat, and the heat is conducted to the components associated with it, and the frost is heated and removed. When the frost on the gravity plate 4 is removed, the No. 2 spring 5 drives the gravity plate 4 to reset. At this time, the No. 1 guide rod 8 is separated from the limit pin 3. At this time, the current flows through the corresponding transmission line 15 under the cross arm 11, and heats and cleans the condensed frost thereon.

[0051] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A high-voltage overhead steel structure for power transmission and transformation construction, comprising a support frame (1), a cross arm (11), a slide bar (12), a buffer spring (13), a drive mechanism (17) and a gravity plate (4), wherein the support frame (1) is horizontally symmetrically mounted with a cross arm (11), the cross arm (11) is horizontally symmetrically slidably mounted with a slide bar (12), one end of the slide bar (12) is connected to the cross arm (11) through a buffer spring (13), the other end of the slide bar (12) is sequentially connected to a transmission line (15) and an insulator (16) through a rotating block (14), a drive mechanism (17) is rotatably mounted on the rotating block (14), the drive mechanism (17) uses gas flow as power to rotate and squeeze air, thereby providing high-pressure airflow to the outside, characterized in that A limit groove (121) is provided at the lower end of the slide rod (12); a cylinder (2) is installed on the cross arm (11); a limit pin (3) is coaxially slidably installed in the cylinder (2); the upper end of the limit pin (3) is slidably connected to the limit groove (121); a valve ring (21) is provided on the limit pin (3); the valve ring (21) is located in the cylinder (2); the valve ring (21) and the inner wall of the cylinder (2) form a closed space and are connected to the output end of the driving mechanism (17); a gravity component is connected to the lower end of the limit pin (3); the gravity component is connected to the gravity plate (4); the gravity component drives the limit pin (3) to separate from the limit groove (121) through the change of gravity on the gravity plate (4).

2. A high-voltage overhead steel structure for power transmission and transformation construction according to claim 1, characterized in that: The gravity assembly comprises a sliding pin (22), a retaining ring (23), a first spring (6) and a second spring (5); a sliding pin (22) is coaxially arranged in the cylinder (2); the sliding pin (22) is located below the valve ring (21); the sliding pin (22) comprises a sliding portion (221) and a supporting portion (222); the supporting portion (222) is located at the upper end of the sliding portion (221); the limiting pin (3) is slidably connected with the sliding portion (221); the limiting pin (3) passes through the sliding portion (221); one end of the sliding portion (221) passes through the cylinder (2) and is slidably connected to the gravity plate (4); the gravity plate (4) is fixed by the sliding pin (22) The gravity plate (4) is fixed on the lower end surface of the cylinder (2), and is arranged horizontally. A second spring (5) is coaxially mounted on the sliding portion (221), and the two ends of the second spring (5) are respectively connected to the support portion (222) and the inner wall of the lower end of the cylinder (2). The retaining ring (23) is coaxially mounted in the cylinder (2), and the retaining ring (23) is located below the support portion (222). The inner diameter of the retaining ring (23) is smaller than the outer diameter of the support portion (222). The retaining ring (23) is made of elastic material. A first spring (6) is coaxially arranged in the cylinder (2), and the two ends of the first spring (6) are respectively connected to the valve ring (21) and the inner wall of the upper end of the cylinder (2).

3. A high-voltage overhead steel structure for power transmission and transformation construction according to claim 2, characterized in that: The cylinder (2) is connected to the cross arm (11) via a connecting rod (7); the connecting rod (7) comprises a connecting portion (71), an impact portion (72) and a vibrating portion (73); one side of the connecting portion (71) is connected to the cross arm (11); the other side of the connecting portion (71) is connected to a plurality of vibrating portions (73) and the cylinder (2); the vibrating portions (73) are evenly distributed in an annular shape on the end surface of the connecting portion (71); the vibrating portions (73) are radially clearance-matched with the connecting portion (71); an impact portion (72) is provided at the far end of the vibrating portion (73); and the impact portion (72) is located between the connecting portion (71) and the vibrating portion (73).

4. A high-voltage overhead steel structure for power transmission and transformation construction according to claim 2, characterized in that: The gravity plate (4) and the sliding pin (22) are clearance-matched. The gravity plate (4) comprises a supporting section (41) and a connecting section (42). A rectangular groove (421) is provided on the lower end surface of the connecting section (42) where the sliding pin (22) is fitted. The supporting section (41) is fan-shaped. The small-diameter end of the supporting portion (222) is connected to the connecting section (42). A sliding block (224) is connected to the lower end surface of the sliding portion (221). The rectangular groove (421) and the sliding block (224) are clearance-matched. A plurality of arc-shaped bosses (2241) are alternately arranged on the inner wall of the rectangular groove (421) and the side wall of the sliding block (224) along the radial direction of the connecting rod (7).

5. A high-voltage overhead steel structure for power transmission and transformation construction according to claim 3, characterized in that: The outer wall of the vibration part (73) is provided with a bending groove (731), the lower end surface of the cylinder (2) is provided with a fixing groove (24), the fixing groove (24) is slidably connected to the gravity plate (4), and the side wall of the fixing groove (24) and the vibration part (73) are made of memory metal.

6. A high-voltage overhead steel structure for power transmission and transformation construction according to claim 1, characterized in that: A guide rod (8) is connected between the cross arms (11). The limit pin (3) comprises a travel portion (31) and a limit portion (32). The limit pin (3) is in a horn shape. The upper portion of the limit pin (3) is the limit portion (32). The limit portion (32) cooperates with the limit groove (121). The limit portion (32) is located directly above the guide rod (8). The travel portion (31) is slidably installed in the cylinder (2). A matching groove (33) is provided on the lower end surface of the travel portion (31). A ring sleeve (9) is connected to the transmission line (15). A guide pin (91) is provided on the ring sleeve (9). The guide pin (91) is vertically upward, and its axis is colinear with the center of the matching groove (33).

7. A high-voltage overhead steel structure for power transmission and transformation construction according to claim 6, characterized in that: The guide pin (91) comprises a pin (911), a hinge (912) and a support ring (913); the upper end of the support ring (913) is annularly connected with a plurality of hinges (912); a pin (911) is coaxially slidably installed in the support ring (913); the top of the pin (911) is conical; the lower end of the support ring (913) is connected to the ring sleeve (9); the lower end of the pin (911) is slidably connected to the power transmission line (15); the hinge (912) is made of elastic material; and the sides of adjacent hinges (912) fit together.

8. A high-voltage overhead steel structure for power transmission and transformation construction according to claim 2, characterized in that: The cylinder (2) is vertically and evenly distributed with fixing plates (25), the radial spacing of the fixing plates (25) is greater than the outer diameter of the support portion (222), the lower end surface of the fixing plate (25) is in contact with the clamping ring (23), the inner side of the fixing plate (25) is provided with a deformation groove (251), the fixing plate (25) is made of a flexible material, and the deformation groove (251) is located between the upper end surface of the clamping ring (23) and the lower end surface of the support portion (222).

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