A cable branch box incoming and outgoing line cable joint temperature on-line monitoring device

Abstract

This invention relates to the field of online temperature monitoring technology for cable joints at the inlet and outlet of cable distribution boxes, and discloses an online temperature monitoring device for cable joints at the inlet and outlet of cable distribution boxes. The device includes a main unit, an optical fiber sensor, and a display screen. A back plate is provided on the rear side of the main unit, and a fixing plate is disposed on the back of the back plate. An insert block and an insert plate are connected to the front side of the fixing plate. A connecting plate is connected to the back of the main unit, and an arc-shaped plate is movably sleeved on the outside of the connecting plate, with the top end of the arc-shaped plate movably engaged with the insert plate. This invention, by providing an auxiliary mounting plate with a hinged connection on the rear side of the main unit and utilizing a snap-fit ​​structure, can facilitate the replacement or connection of the optical fiber sensor while fixing the main unit, ensuring the stability of the main unit installation. Furthermore, the snap-fit ​​structure is retractable, facilitating the replacement or connection of the optical fiber sensor, avoiding damage to the optical fiber sensor, and improving the convenience of manual operation.

Description

Technical Field

[0001] This invention relates to the field of online temperature monitoring technology for cable joints at the inlet and outlet of cable branch boxes, specifically to an online temperature monitoring device for cable joints at the inlet and outlet of cable branch boxes. Background Technology

[0002] Online temperature monitoring of cable joints at cable distribution boxes is typically achieved through wireless temperature measurement devices or fluorescent fiber optic temperature measurement devices. The core component is a high-insulation, electromagnetic interference-resistant temperature sensor installed at the joint, such as a contact platinum resistance thermometer, surface acoustic wave sensor, or fluorescent fiber optic sensor. This sensor works in conjunction with a wireless / wired transmission module and a back-end monitoring system to complete real-time data acquisition and over-temperature alarms.

[0003] Current mainstream solutions favor passive wireless temperature measurement or fluorescent fiber optic temperature measurement, especially in outdoor cable distribution boxes with IP65 or higher protection. Fluorescent fiber optic temperature measurement is favored in high-end power distribution network projects due to its inherent safety advantages. The fluorescent fiber optic online monitoring device mainly consists of a temperature transmitter main unit, a display screen, and a fiber optic sensor. The main unit is installed in the instrument room of the cable distribution box, with one end of the fiber optic sensor connected to the main unit and the other end fixed at the temperature monitoring position. However, in actual operation, the fiber optic interface of the main unit is generally located at the bottom, and other instruments within the control cabinet can obstruct the view. Furthermore, the limited bending limit of the fiber optic sensor makes it difficult to replace or add sensors later, easily damaging the fiber optic cable, increasing operating costs, and affecting subsequent monitoring accuracy. Additionally, during actual installation, the distance between the main unit of the cable joint temperature online monitoring device and adjacent instruments is difficult to control. Too close a distance affects the fiber optic connection, while too far a distance wastes space and causes inconvenience to staff. Summary of the Invention

[0004] In view of the shortcomings of existing online cable joint temperature monitoring devices mentioned in the background art, the present invention provides an online monitoring device for the temperature of cable joints at the inlet and outlet of cable branch boxes, which has the advantages of being easy to use, convenient to maintain, and adaptable to the characteristics of fiber optic sensors, thus solving the technical problems mentioned in the background art.

[0005] The present invention provides the following technical solution: an online monitoring device for the temperature of cable joints at the inlet and outlet of a cable branch box, comprising a main unit, an optical fiber sensor and a display screen. A back plate is provided on the rear side of the main unit, and a fixing plate is disposed on the back of the back plate. An insert block and an insert plate are connected to the front side of the fixing plate. A connecting plate is connected to the back of the main unit. An arc-shaped plate is movably sleeved on the outside of the connecting plate, and the top end of the arc-shaped plate is movably engaged with the insert plate. A sleeve connected to the back plate is provided above the connecting plate, and the sleeve is movably inserted into the connecting plate. A limit plate is installed below the main unit.

[0006] Furthermore, the bottom of the main unit is equipped with several fiber optic sensor interfaces, and the top of the main unit is movably connected to the back panel via a hinge, which facilitates the deflection of the main unit and provides convenience for subsequent connection or replacement of fiber optic sensors.

[0007] Furthermore, the fixing plate is provided with countersunk holes for fixing, which makes fasteners such as bolts invisible and facilitates the installation of the back plate. The front side of the fixing plate is connected to a plug block, and the front side of the plug block is connected to a plug plate. The plug block and the plug plate are the same height, and their top and bottom ends are located on the same horizontal plane, which makes it easy for the slot to fit into the outside of the plug block. The plug plate has an inclined structure, and its inclination angle corresponds to the deflection path of the host, which allows the buckle to fit in perfectly. The plug plate also has a slot in the middle.

[0008] Furthermore, a slot is provided on the side of the back plate that contacts the fixing plate. The slot is fitted onto the outside of the plug block to define the overall position of the main unit.

[0009] Furthermore, the connecting plate is fixedly connected to the back of the main unit, and the connecting plate is an arc-shaped structure with the same center as the top hinge of the main unit, which can ensure the smooth deflection of the main unit and avoid motion interference. The connecting plate is provided with a limiting hole that runs through the top and bottom.

[0010] Furthermore, the arc-shaped plate is movably sleeved on the outside of the connecting plate, and the arc-shaped plate is an arc-shaped structure concentric with the connecting plate. A through hole is provided on the arc-shaped plate. When the overall length of the arc-shaped plate and the connecting plate is at its shortest position, the through hole coincides with the limiting hole. Both the arc-shaped plate and the connecting plate are made of non-magnetic insulating material, which can ensure the cooperative action of the limiting hole and the magnetic block.

[0011] Furthermore, the front end of the curved plate is connected to a buckle with a symmetrical "S" shaped structure. The buckle is elastic and can be moved and engaged in the slot to fix the main unit and ensure the stability of the main unit during operation. A slot is opened in the middle of the curved plate to facilitate the movement of the buckle.

[0012] Furthermore, the sleeve is located above the arc-shaped plate and the connecting plate, and a limiting post is movably inserted inside the sleeve. The limiting post is also connected to the inside of the sleeve through a spring. In its natural state, the spring causes the bottom end of the limiting post to be inserted into the limiting hole, and the bottom end of the limiting post is magnetic.

[0013] Furthermore, the limiting plate is movably inserted into the bottom of the back of the main unit. A magnetic block is provided on the top of the limiting plate, located directly below the sleeve. The magnetic block is magnetic, and the polarity of the magnetic block and the limiting post are the same on the opposite side. The magnetic block can move up to the bottom of the connecting plate. When the magnetic block and the limiting post are close together, the magnetic repulsion force is greater than the sum of the weight of the limiting post itself and the elastic force required for the deformation of its connecting spring. This allows the limiting plate to move up and, under the action of magnetic repulsion, cause the limiting post to leave the connecting plate and the arc plate. At this time, the main unit can be deflected to realize the connection or replacement of the fiber optic sensor.

[0014] The present invention has the following beneficial effects: 1. This invention provides an auxiliary mounting plate with a hinged connection on the rear side of the main unit of the device. By using a snap-fit ​​structure, the main unit can be fixed while facilitating the replacement or connection of the fiber optic sensor in the future, ensuring the stability of the main unit installation. At the same time, the snap-fit ​​is designed to be retractable, which facilitates the replacement or connection of the fiber optic sensor in the future, avoids damage to the fiber optic sensor, and improves the convenience of manual operation.

[0015] 2. By setting a limiting plate at the bottom of the main unit of the device, the present invention can facilitate the positioning of adjacent instruments and avoid the problem of affecting the operation of the fiber optic sensor due to excessive distance. At the same time, it can make reasonable use of space. Furthermore, by setting a magnetic block at the top of the limiting plate, the limiting block of the buckle can move upward when it moves upward, thereby enabling the buckle to extend and retract normally, facilitating the deflection of the main unit of the device, and thus providing convenience for the replacement and connection of the fiber optic sensor. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the invention; Figure 2 This is a schematic diagram of the structure on the back of the present invention; Figure 3 This is a partial cross-sectional structural diagram of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the structure of the fixing plate in this invention; Figure 6 This is a schematic diagram of the back plate structure in this invention.

[0017] In the diagram: 1. Main unit; 2. Back panel; 21. Slot; 3. Fixing plate; 31. Insert block; 32. Insert plate; 321. Card slot; 4. Arc plate; 41. Buckle; 5. Connecting plate; 51. Limiting hole; 6. Sleeve; 61. Limiting post; 7. Limiting plate; 71. Magnetic block. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1An online temperature monitoring device for cable joints at the inlet and outlet of a cable branch box includes a main unit 1, fiber optic sensors, and a display screen. The bottom of the main unit 1 has interfaces for several fiber optic sensors, and the top of the main unit 1 is movably connected to a back plate 2 via a hinge, facilitating the deflection of the main unit 1 for convenient connection or replacement of subsequent fiber optic sensors. The back plate 2 is located on the rear side of the main unit 1. (See reference...) Figure 2 The back of the back plate 2 is equipped with a fixing plate 3. The front of the fixing plate 3 is connected to the insert block 31 and the insert plate 32. The back of the main unit 1 is connected to a connecting plate 5. An arc plate 4 is movably sleeved on the outside of the connecting plate 5, and the top of the arc plate 4 is movably snapped onto the insert plate 32. A sleeve 6 connected to the back plate 2 is provided above the connecting plate 5, and the sleeve 6 is movably inserted into the connecting plate 5. A limit plate 7 is installed below the main unit 1.

[0020] Please see Figure 5 The fixing plate 3 has countersunk holes for fixing, which makes bolts and other fasteners concealed, facilitating the installation of the back plate 2. A plug block 31 is connected to the front of the fixing plate 3, and a plug plate 32 is connected to the front of the plug block 31. The plug block 31 and the plug plate 32 are the same height, and their top and bottom ends are on the same horizontal plane, facilitating the insertion of the slot 21 onto the outside of the plug block 31. The plug plate 32 has an inclined structure, and its inclination angle corresponds to the deflection path of the main unit 1, allowing the latch 41 to snap into place. A slot 321 is provided in the middle of the plug plate 32. (See reference...) Figure 6 The back plate 2 has a slot 21 on the side that contacts the fixing plate 3. The slot 21 is fitted onto the outside of the plug 31 to limit the overall position of the host 1.

[0021] Please see Figure 3-4The connecting plate 5 is fixedly connected to the back of the main unit 1. The connecting plate 5 is an arc-shaped structure concentric with the top hinge of the main unit 1, which can ensure the smooth deflection of the main unit 1 and avoid motion interference. The connecting plate 5 has a vertically penetrating limiting hole 51. The arc-shaped plate 4 is movably sleeved on the outside of the connecting plate 5. The arc-shaped plate 4 is an arc-shaped structure concentric with the connecting plate 5. The arc-shaped plate 4 has a through hole. When the overall length of the arc-shaped plate 4 and the connecting plate 5 is at its shortest position, the through hole coincides with the limiting hole 51. The arc-shaped plate 4 and the connecting plate 5 are both made of non-magnetic insulating material, which can ensure the cooperation between the limiting hole 51 and the magnetic block 71. The front end of the arc-shaped plate 4 is connected to a buckle 41, which is a symmetrical "S" shape. The structure features a flexible buckle 41 that is movably engaged within the slot 321 to secure the main unit 1 and ensure its stability during operation. A slot is provided in the center of the arc-shaped plate 4 to facilitate the movement of the buckle 41. The cooperation between the back plate 2 and the fixing plate 3 facilitates the installation of the main unit 1. Furthermore, the cooperation between the arc-shaped plate 4, the connecting plate 5, and the sleeve 6 secures the main unit 1, ensuring its stability and facilitating manual operation. The sleeve 6, in conjunction with the limiting plate 7, movably connects the main unit 1 and the back plate 2, allowing for easy outward rotation of the main unit 1 later. This facilitates the connection and replacement of the fiber optic sensor, significantly improving the ease of installation, use, and maintenance of the device.

[0022] Please see Figure 4 The sleeve 6 is located above the arc-shaped plate 4 and the connecting plate 5, and a limiting post 61 is movably inserted inside the sleeve 6. The limiting post 61 is also connected to the inside of the sleeve 6 via a spring. In its natural state, the spring causes the bottom end of the limiting post 61 to be inserted into the limiting hole 51, and the bottom end of the limiting post 61 is magnetic. (See reference...) Figure 3 The limiting plate 7 is movably inserted into the bottom of the back of the main unit 1, which can reserve the slack for fiber optic wiring and facilitate the installation of other instruments in the electrical control cabinet, thereby improving space utilization. The top of the limiting plate 7 is provided with a magnetic block 71 located directly below the sleeve 6. The magnetic block 71 is magnetic, and the polarity of the side opposite to the limiting post 61 is the same. The magnetic block 71 can move up to the bottom of the connecting plate 5. When the magnetic block 71 and the limiting post 61 are close, the magnetic repulsion force is greater than the sum of the weight of the limiting post 61 and the elastic force required for the deformation of its connecting spring. This allows the limiting plate 7 to move up and cause the limiting post 61 to leave the connecting plate 5 and the arc plate 4 under the action of magnetic repulsion. At this time, the main unit 1 can be deflected to realize the connection or replacement of the fiber optic sensor.

[0023] The working principle of the method of use of this invention is as follows: The fixing plate 3 is fixedly connected to a designated position such as an electrical control cabinet using bolts, etc. The piston at the bottom interface of the main unit 1 is removed and connected to the fiber optic sensor. Then, the back plate 2 is inserted into the fixing plate 3, so that the slot 21 is fitted onto the outside of the insert block 31. The sleeve 6 is deflected, causing the buckle 41 to deform under force and engage in the slot 321, thus fixing the position of the main unit 1. At this time, the limiting post 61 is inserted into the limiting hole 51 under the action of the spring, and the main unit 1 cannot be deflected. Other instruments below the fiber optic interface at the bottom of the main unit 1 are installed below the limiting plate 7 to ensure that the bending of the fiber optic sensor does not affect its operation. Then, the other end of the fiber optic sensor is fixed to the corresponding detection position inside the cable branch box, and the fiber optic sensor is fixed to the corresponding path using straps, etc. After connecting the power supply, display, and other lines, and putting it into use, the fiber optic sensor monitors the temperature of the corresponding detection point in the cable branch box. The data is transmitted to the host 1 for processing and displayed on the screen. The background monitoring system collects data and issues over-temperature alarms. When it is necessary to add or replace the fiber optic sensor, move the limit plate 7 upward and bring the magnetic block 71 close to the limit post 61. The limit post 61 moves upward and away from the limit hole 51 due to the repulsive force. At this time, the host 1 can be deflected outward so that the fiber optic sensor interface at the bottom of the host 1 faces outward. Then, the replacement or connection can be performed. After the operation is completed, deflect the host 1 and align the limit hole 51 with the limit post 61. At the same time, move the limit plate 7 downward. The limit post 61 is inserted into the limit hole 51 under the action of the spring, thus fixing the position of the host 1.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A kind of cable branch box incoming / outgoing line cable joint temperature on-line monitoring device, including host computer (1), optical fiber sensor and display screen, it is characterized in that: The host (1) has a back plate (2) on its rear side, a fixing plate (3) on the back side of the back plate (2), a plug (31) and a plug (32) connected to the front side of the fixing plate (3), a connecting plate (5) connected to the back side of the host (1), an arc plate (4) movably sleeved on the outside of the connecting plate (5), and the top of the arc plate (4) movably snapped onto the plug (32), a sleeve (6) connected to the back plate (2) is provided above the connecting plate (5), and the sleeve (6) movably inserts into the connecting plate (5), and a limit plate (7) is installed below the host (1).

2. The cable access cable joint temperature on-line monitoring device of the cable branch box according to claim 1, characterized in that: The bottom of the host (1) is provided with interfaces for several fiber optic sensors, and the top of the host (1) is movably connected to the back plate (2) via a hinge.

3. The cable access cable joint temperature on-line monitoring device of the cable branch box according to claim 1, characterized in that: The fixing plate (3) is provided with countersunk holes for fixing. The front side of the fixing plate (3) is connected to the insert block (31), and the front side of the insert block (31) is connected to the insert plate (32). The insert block (31) and the insert plate (32) are at the same height, and their top and bottom ends are located on the same horizontal plane. The insert plate (32) is an inclined structure, and a slot (321) is opened in the middle of the insert plate (32).

4. The cable access cable joint temperature on-line monitoring device of a cable branch box according to claim 3, characterized in that: The back plate (2) has a slot (21) on the side that contacts the fixing plate (3), and the slot (21) is fitted onto the outside of the plug (31).

5. The cable access cable joint temperature on-line monitoring device of a cable branch box according to claim 3, characterized in that: The connecting plate (5) is fixedly connected to the back of the host (1), and the connecting plate (5) is an arc-shaped structure with the same center as the top hinge of the host (1). A limiting hole (51) is provided on the connecting plate (5) that runs through the top and bottom.

6. The online monitoring device for the temperature of the cable joints at the inlet and outlet of a cable branch box according to claim 5, characterized in that: The arc plate (4) is movably sleeved on the outside of the connecting plate (5), and the arc plate (4) is an arc structure concentric with the connecting plate (5). A through hole is provided on the arc plate (4). The through hole coincides with the limiting hole (51) when the overall length of the arc plate (4) and the connecting plate (5) is at its shortest position. The arc plate (4) and the connecting plate (5) are both made of non-magnetic insulating material.

7. The cable access cable joint temperature on-line monitoring device of a cable branch box according to claim 6, characterized in that: The front end of the arc plate (4) is connected to a buckle (41). The buckle (41) is a symmetrical "S" shaped structure. The buckle (41) is movably engaged in the slot (321). The arc plate (4) has a slot in the middle.

8. The cable access cable joint temperature on-line monitoring device of a cable branch box according to claim 6, characterized in that: The sleeve (6) is located above the arc plate (4) and the connecting plate (5), and a limiting post (61) is movably inserted inside the sleeve (6). The limiting post (61) is connected to the inside of the sleeve (6) through a spring. In its natural state, the bottom end of the limiting post (61) is inserted into the limiting hole (51), and the bottom end of the limiting post (61) is magnetic.

9. The cable access cable joint temperature on-line monitoring device of a cable branch box according to claim 6, characterized in that: The limiting plate (7) is movably inserted into the bottom of the back of the main unit (1). The top of the limiting plate (7) is provided with a magnetic block (71) located directly below the sleeve (6). The magnetic block (71) is magnetic. The magnetic block (71) and the limiting post (61) have the same polarity on the opposite side. The magnetic block (71) can move up to the bottom of the connecting plate (5). When the magnetic block (71) and the limiting post (61) are close, the magnetic repulsion force is greater than the sum of the weight of the limiting post (61) itself and the elastic force required for the deformation of its connecting spring.

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