A self-monitorable composite cross arm

Abstract

The application discloses a self-monitoring composite cross arm, which comprises a cross arm mechanism and a monitoring mechanism, wherein the cross arm mechanism comprises a core body, an optical fiber located at the periphery of the core body, a protective layer located at the outer side of the optical fiber, a sheath located at the outer side of the protective layer and a flange located at the end of the core body; the monitoring mechanism comprises a connecting piece arranged at the outer side of the flange, wherein the lower part of the connecting piece is provided with a control piece, the outer side of the control piece is provided with a clamping piece, the upper part of the control piece is provided with a driving ring, the inner wall of the driving ring is provided with a torsional spring piece, the inner side of the torsional spring piece is connected with a fixing table, and the outer side of the fixing table is provided with an optical fiber demodulator; the control piece, the driving ring and the clamping piece are matched and arranged, the user can realize the installation and dismounting of the optical fiber demodulator without any tool, and the optical fiber demodulator can be pushed out while being unlocked under the secondary rotation cooperation of the control piece.

Description

Technical Field

[0001] This invention relates to the field of power transmission equipment condition monitoring, and in particular to a self-monitoring composite crossarm. Background Technology

[0002] Composite crossarms are one of the most important components of overhead transmission lines. Under prolonged exposure to sunlight, rain, and the mechanical forces of the conductors, the silicone rubber material on the outer surface of the composite crossarm is prone to developing minute cracks. This allows moisture to penetrate the outer sheath and the interface between the silicone rubber and the core, causing the composite crossarm to overheat. In colder regions during winter, the surface of the composite crossarm is prone to icing. Icing increases the load on the composite crossarm, accelerates its aging, and affects the safe operation of the power grid. Typically, fiber optic sensors and fiber optic demodulators are used to monitor the temperature rise and stress changes on the crossarm surface. However, current technologies typically use bolted or welded connections between the fiber optic demodulator and the crossarm, which are inconvenient for users to disassemble for maintenance or data analysis. Therefore, a composite crossarm design that facilitates the assembly and disassembly of the fiber optic demodulator is proposed. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0005] Therefore, the present invention aims to solve the technical problem that existing composite crossarms are inconvenient for the assembly and disassembly of fiber optic demodulators.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a self-monitoring composite crossarm, comprising a crossarm mechanism including a core, an optical fiber located around the core, a protective layer located outside the optical fiber, a sheath located outside the protective layer, and a flange located at the end of the core.

[0007] The monitoring mechanism includes a connector disposed on the outside of the flange, a control component disposed at the lower part of the connector, a clamping component disposed on the outside of the control component, a drive ring disposed at the upper part of the control component, a torsion spring disposed on the inner wall of the drive ring, a fixed platform connected to the inner side of the torsion spring, and an optical fiber demodulator disposed on the outer side of the fixed platform.

[0008] As a preferred embodiment of the self-monitoring composite crossarm of the present invention, the optical fibers are distributed in a ring array on the outside of the core.

[0009] As a preferred embodiment of the self-monitoring composite crossarm of the present invention, a first sealing ring is provided at the connection between the flange and the sheath, and a second sealing ring is provided at the connection between the flange and the core.

[0010] As a preferred embodiment of the self-monitoring composite crossarm of the present invention, the connecting member includes a collar sleeved around the flange, the lower part of the collar is connected to a placement seat, and the side plate surface of the placement seat has a notch.

[0011] The control component includes a control base that extends through the placement seat, a push plate is provided at the front of the control base, a rotating tube is provided on the surface of the push plate, and a stop rod is provided on the surface of the rotating tube;

[0012] The clamping component includes a clamping rod disposed on the outside of the push plate, a stop plate disposed on the outside of the clamping rod, and a spring disposed on the outside of the stop plate.

[0013] As a preferred embodiment of the self-monitoring composite crossarm of the present invention, the push plate has recesses on both sides that can cooperate with the locking rod, and the locking rod abuts against the push plate.

[0014] The locking rod passes through the notch, and the locking rod and the notch form an elastic telescopic structure through a spring.

[0015] As a preferred embodiment of the self-monitoring composite crossarm of the present invention, the side wall of the rotating tube is provided with a recess arranged counterclockwise along its radial direction, and the rotating tube is engaged with the drive ring.

[0016] As a preferred embodiment of the self-monitoring composite crossarm of the present invention, the push plate and the drive ring form a linkage structure through a rotating tube, and the drive ring and the fixed platform form an elastic rotation structure through a torsion spring.

[0017] As a preferred embodiment of the self-monitoring composite crossarm of the present invention, the surface of the drive ring is provided with a connecting groove, and the surface of the drive ring away from the connecting groove is provided with a bayonet.

[0018] As a preferred embodiment of the self-monitoring composite crossarm of the present invention, the fiber optic demodulator is provided with a connecting block on its outer side that mates with the connecting slot, and the connecting block and the connecting slot form a sliding structure.

[0019] As a preferred embodiment of the self-monitoring composite crossarm described in this invention, the outer side of the fiber optic demodulator is further provided with a spring piece that engages with a bayonet.

[0020] The beneficial effects of this invention are as follows: By combining the fiber optic demodulator with the optical fiber, the temperature and stress changes on the core surface are monitored by the optical fiber, thereby enabling the monitoring of state variables such as temperature rise and icing degree during composite crossarm failures, reducing the failure risk of composite crossarms and improving the reliability of power grid operation.

[0021] Through the coordinated design of the control components, drive ring, and locking components, users can install and disassemble the fiber optic demodulator without any tools. Furthermore, with the secondary rotation of the control components, the fiber optic demodulator can be unlocked and ejected, further improving the convenience of installation and removal, meeting users' daily needs, and reducing their workload. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0023] Figure 1 A schematic diagram of the overall structure of a self-monitoring composite crossarm according to an embodiment of the present invention;

[0024] Figure 2 A three-dimensional cross-sectional structural diagram of the self-monitoring composite crossarm mechanism provided in one embodiment of the present invention;

[0025] Figure 3 A front cross-sectional view of the crossarm mechanism in a self-monitoring composite crossarm according to an embodiment of the present invention is provided.

[0026] Figure 4 An exploded view of the monitoring mechanism in a self-monitoring composite crossarm according to an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the connection structure between the drive ring and the control component in a self-monitoring composite crossarm according to an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of the connection structure between the connecting groove and the connecting block in a self-monitoring composite crossarm according to an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of the back structure of the fiber optic demodulator in a self-monitoring composite crossarm according to an embodiment of the present invention;

[0030] Figure 8This is a schematic diagram of the connection structure between the spring clip and the bayonet in a self-monitoring composite crossarm according to an embodiment of the present invention. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0034] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0035] Example 1

[0036] Reference Figure 1-3 This embodiment provides a self-monitoring composite crossarm.

[0037] The self-monitoring composite crossarm includes a crossarm mechanism 100.

[0038] Specifically, the crossarm mechanism 100 includes a core 101, with several optical fibers 102 distributed at equal angles around the core 101. The outer side of the optical fibers 102 is coated with a protective layer 103, and the outer side of the protective layer 103 is also coated with a sheath 104. Flanges 105 are provided at both ends of the core 101. A first sealing ring 106 is provided at the connection between the flange 105 and the sheath 104, and a second sealing ring 107 is provided at the connection between the flange 105 and the core 101.

[0039] Preferably, the optical fibers 102 are arranged around the core 101 at 30° circumferential angles and fixed to the surface of the core 101 by a protective layer 103 formed of room-temperature vulcanized silicone rubber. This arrangement ensures that the optical fibers 102 can cover the main fault areas and icing areas (i.e., the sides) of the entire composite crossarm when monitoring temperature and stress changes. When a fault temperature rise or stress change occurs between two adjacent optical fibers, the specific location and approximate state change value can be inferred by observing the different or identical center wavelength offsets caused by the two state variables reaching the two fibers after traveling different or the same distances. If the circumferential angle is too small, a larger number of optical fibers will be drawn out, increasing the risk of fiber damage; if the circumferential angle is too large, the spacing between adjacent optical fibers will be too large, making it difficult to determine the location and approximate state change value when a fault temperature rise or icing occurs between adjacent optical fibers.

[0040] Furthermore, after the room-temperature vulcanized silicone rubber coated on the surface of the core 101 solidifies, the sheath 104 is cast. During this process, the optical fiber at the high-voltage side of the crossarm is completely buried under the sheath 104, while the low-voltage side end is led out from the interface between the sheath 104 and the core 101. The optical fiber 102 is routed out from the bottom of the sheath 104 without contacting the inner wall of the flange 105. Then, the first sealing ring 106, the second sealing ring 107, and the flange 105 are installed. The gap between the flange 105, the second sealing ring 107, and the sheath 104 is filled with room-temperature vulcanized silicone rubber. Finally, flange glue is injected to bond the flange 105 and the core 101, making the composite crossarm shape and interface complete and avoiding a decrease in the sealing performance of the composite crossarm due to the addition of optical fibers.

[0041] When the composite crossarm performs self-monitoring, optical fiber 102 is connected to optical fiber demodulator 207. During normal operation, incident light waves are emitted from optical fiber demodulator 207, enter optical fiber 102, and are reflected back. When the composite crossarm experiences abnormal heating or icing due to a fault, the center wavelength of the reflected light wave shifts. This shift is proportional to the temperature change or the stress change of the optical fiber. This principle can be used to calculate the temperature change and surface icing degree of the composite crossarm, and to roughly infer the location of the fault or icing on the composite crossarm. Through the coordinated setup of optical fiber demodulator 207 and optical fiber 102, optical fiber 102 monitors the temperature and stress changes on the surface of core 101. When a fault temperature rise or stress change occurs between two adjacent optical fibers, the different or the same center wavelength shift caused by the two state variables reaching the two optical fibers after traveling different or the same distances can be used to infer the specific location of the fault or icing and the approximate state change value. This achieves the monitoring of state variable changes such as fault temperature rise and icing degree of the composite crossarm, reducing the fault risk of the composite crossarm and improving the reliability of power grid operation.

[0042] Example 2

[0043] Reference Figure 1-8 This is the second embodiment of the present invention, which is based on the previous embodiment and differs from the previous embodiment in that:

[0044] The self-monitoring composite crossarm also includes a monitoring agency 200.

[0045] Specifically, the monitoring mechanism 200 includes a connector 201 disposed on the outside of the flange 105. The connector 201 consists of a circular collar 201a sleeved around the flange 105 and a placement seat 201b fixed to the lower part of the collar 201a. The placement seat 201b is connected to the crossbeam mechanism 100 through the collar 201a. The side wall of the placement seat 201b also has a notch 201c. A control component 202 is installed on the back plate of the placement seat 201b. The control component 202 includes a rotatably mounted irregularly shaped push plate 202b at the bottom center of the placement seat 201b. A rotating tube 202c is fixedly connected to the center of the surface of the push plate 202b, and a stop rod 202d is fixedly disposed on the front surface of the rotating tube 202c. Clamping components 203 are movably connected to both the upper and lower sides of the push plate 202b. The clamping components 203 include components penetrating through the notch 201a. The lever 203a of 01c has a stop plate 203b integrally provided on the lower periphery of the lever 203a. A spring 203c is provided on the outer side of the stop plate 203b and is located between the stop plate 203b and the placement seat 201b. The upper and lower sides of the push plate 202b are also provided with recesses that can cooperate with the lever 203a. The lever 203a and the push plate 202b can always abut against each other. The upper part of the rotating tube 202c is also movably fitted with a drive ring 204. The surface of the drive ring 204 has two connecting grooves 204a arranged in a ring array. At the same time, the surface of the drive ring 204 away from the connecting grooves 204a has a bayonet 204b. The inner wall of the drive ring 204 is fixedly connected to a torsion spring 205. The inner end of the torsion spring 205 is fixedly connected to a fixed platform 206. The outer surface of the fixed platform 206 is also fixed with an optical fiber demodulator 207.

[0046] Furthermore, a connecting block 207a that mates with the connecting groove 204a is fixedly installed on the side surface of the fiber optic demodulator 207 connected to the fixed platform 206. The connecting block 207a is movably embedded in the connecting groove 204a. The drive ring 204 can achieve connection with the fiber optic demodulator 207 through the cooperation of the connecting block 207a and the connecting groove 204a. At the same time, it can ensure that the drive ring 204 can rotate flexibly under the drive of the torsion spring 205.

[0047] The fiber optic demodulator 207 also has a spring piece 207b on its outer side that engages with a bayonet 204b. The spring piece 207b is made of a deformable material and is tilted. Its lowest point is fixed to the back of the fiber optic demodulator 207, while its highest point has a protrusion on its upper surface that engages with the bayonet 204b. Initially, the torsion spring 205 is in a compressed state. At this time, the top protrusion of the spring piece 207b is located at the bayonet 204b, that is, the spring piece 207b and the bayonet 204b are engaged, thereby ensuring the stable working state of the torsion spring 205. At the same time, the bayonet 204b can also engage with the abutment rod 202d. That is, when the abutment rod 202d is inserted into the bayonet 204b, the spring piece 207b can be pushed out of the bayonet 204b, thereby releasing the lock on the torsion spring 205.

[0048] The sidewall of the rotating tube 202c has two recesses arranged in a ring array, tilted counterclockwise upwards along its radial direction. At the same time, the sidewall of the drive ring 204 has a protrusion that matches the recesses. That is, when the drive ring 204 moves down and contacts the rotating tube 202c, the two can fit tightly together. Meanwhile, the abutment rod 202d can push the spring piece 207b out of the bayonet 204b, so that the restriction on the torsion spring piece 205 is eliminated. Then, under the elastic force of the torsion spring piece 205 and the cooperation of the protrusion and the recess, the drive ring 204 and the rotating tube 202c can be rotated, and the push plate 202b can be rotated.

[0049] The lever 203a is C-shaped, with its lower end passing through the notch 201c and extending to the outside of the placement seat 201b. At the same time, the front part of its lower end abuts against the outer edge of the push plate 202b. When the push plate 202b rotates, the contact point between the push plate 202b and the lever 203a changes, and the lever 203a moves telescopically under the elastic action of the spring 203d, thereby completing the fixing and unlocking action of the lever 203a and the fiber optic demodulator 207.

[0050] Specifically, during the installation of the fiber optic demodulator 207, it is first aligned with the placement base 201b and then gradually placed into the placement base 201b. At this time, the top of the rotating tube 202c gradually contacts and engages with the bottom of the drive ring 204. Simultaneously, the push rod 202d is inserted into the bayonet 204b, pushing the spring piece 207b down and out of the bayonet 204b. At this time, the limiting force from the spring piece 207b on the torsion spring 205 disappears, allowing it to elastically recover and drive the push plate 202b to rotate counterclockwise, causing the locking rod 203a to engage with the push plate 202b. When the contact point between 2b changes, the front end of the locking lever 203a falls into the recessed areas at both ends of the push plate 202b under the elastic force of the spring 203c. At this time, the locking lever 203a retracts, and its upper part moves to the upper part of the fiber optic demodulator 207. The installation of the fiber optic demodulator 207 is then completed. Through the cooperation between the drive ring 204, the rotating tube 202c, and the push plate 202b, the installation of the fiber optic demodulator 207 can be completed simply by placing it in the placement seat 201b. The operation is convenient and the stability is high, which meets the user's needs.

[0051] Example 3

[0052] Reference Figure 1-8 This is the third embodiment of the present invention, which is based on the previous embodiment and differs from the previous embodiment in that:

[0053] The control unit 202 also includes a control base 202a.

[0054] Specifically, the control seat 202a passes through the placement seat 201b and can be rotatably connected to the placement seat 201b via a connecting shaft or the like. Its end is fixed to the push plate 202b, so the movement of the push plate 202b and the rotating tube 202c can be controlled by rotating the control seat 202a.

[0055] When the user needs to remove the fiber optic demodulator 207, first rotate the control base 202a clockwise by 45°. This causes the contact point between the latch 203a and the push plate 202b to change again. The latch 203a moves outward under the push of the push plate 202b, releasing its upper end from locking the fiber optic demodulator 207. At this time, the torsion spring 205 tightens again, and the spring 207b resets and springs back up to engage with the bayonet 204b, restricting the drive ring 204. When the control base 202a rotates, the connecting block 207a and the connecting groove 204a slide relative to each other. The movement allows the drive ring 204 to rotate synchronously with the rotating drum 202c within a 45° range. After the latch 203a completes its outward movement, it continues to rotate clockwise. With the cooperation of the inclined surfaces of the rotating drum 202c and the drive ring 204, the drive ring 204 can be pushed out as the rotating drum 202c rotates, thereby completing the removal of the fiber optic demodulator 207. By controlling the secondary rotation of the base 202a, the fiber optic demodulator 207 can be unlocked and smoothly pushed out of the placement base 201b, making the disassembly and retrieval of the fiber optic demodulator 207 convenient and efficient.

[0056] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0057] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0058] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A self-monitoring composite crossarm, characterized in that: include, The crossarm mechanism (100) includes a core (101), an optical fiber (102) located around the core (101), a protective layer (103) located outside the optical fiber (102), a sheath (104) located outside the protective layer (103), and a flange (105) located at the end of the core (101). The monitoring mechanism (200) includes a connector (201) disposed on the outside of the flange (105), a control component (202) disposed at the lower part of the connector (201), a clamping component (203) disposed on the outside of the control component (202), a drive ring (204) disposed at the upper part of the control component (202), a torsion spring (205) disposed on the inner wall of the drive ring (204), a fixed platform (206) connected to the inner side of the torsion spring (205), and an optical fiber demodulator (207) disposed on the outside of the fixed platform (206). The connector (201) includes a collar (201a) sleeved around the flange (105), and a placement seat (201b) is connected to the lower part of the collar (201a). A notch (201c) is left on the side plate surface of the placement seat (201b). The control component (202) includes a control seat (202a) that extends through the placement seat (201b), a push plate (202b) is provided at the front of the control seat (202a), a rotating tube (202c) is provided on the surface of the push plate (202b), and a stop rod (202d) is provided on the surface of the rotating tube (202c). The clamping member (203) includes clamping rods (203a) disposed on both sides of the push plate (202b), a stop plate (203b) is disposed on the outer side of the clamping rods (203a), a spring (203c) is disposed on the outer side of the stop plate (203b), and the spring (203c) is located between the stop plate (203b) and the placement seat (201b); The push plate (202b) has recesses on both sides that cooperate with the locking rod (203a), and the locking rod (203a) abuts against the push plate (202b); The lever (203a) passes through the notch (201c), and the lever (203a) and the notch (201c) are connected by a spring (203c) to form an elastic telescopic structure.

2. The self-monitoring composite crossarm according to claim 1, characterized in that: The optical fibers (102) are arranged in a ring array on the outside of the core (101).

3. The self-monitoring composite crossarm according to claim 1 or 2, characterized in that: A first sealing ring (106) is provided at the connection between the flange (105) and the sleeve (104), and a second sealing ring (107) is provided at the connection between the flange (105) and the core (101).

4. The self-monitoring composite crossarm according to claim 3, characterized in that: The side wall of the rotating tube (202c) has a recess arranged counterclockwise along its radial direction, and the rotating tube (202c) cooperates with the drive ring (204).

5. The self-monitoring composite crossarm according to claim 4, characterized in that: The push plate (202b) and the drive ring (204) form a linkage structure through the rotating tube (202c), and the drive ring (204) and the fixed platform (206) form an elastic rotation structure through the torsion spring (205).

6. The self-monitoring composite crossarm according to claim 5, characterized in that: The surface of the drive ring (204) is provided with a connecting groove (204a), and the surface of the drive ring (204) away from the connecting groove (204a) is provided with a bayonet (204b).

7. The self-monitoring composite crossarm according to claim 6, characterized in that: The fiber optic demodulator (207) has a connecting block (207a) on its outer side that cooperates with the connecting groove (204a), and the connecting block (207a) and the connecting groove (204a) form a sliding structure.

8. The self-monitoring composite crossarm according to claim 6 or 7, characterized in that: The outer side of the fiber optic demodulator (207) is also provided with a spring (207b) that cooperates with the bayonet (204b).

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