Intelligent cable joint device of 110kV cable branch box with temperature measurement function

Abstract

This invention relates to an intelligent cable connector device for a 110kV cable branch box with temperature measurement function, belonging to the technical field of cable branch boxes. It includes a cable branch box body, with multiple assembly cylinders fixedly inserted at the bottom. Each assembly cylinder has a sealed cooling cylinder fixedly embedded in its center. A thick cable is inserted through the bottom of each sealed cooling cylinder. Through the arrangement of a drive component and a conductive component, rotating the crank handle drives the rotating shaft, which in turn drives the active bevel gear. The active bevel gear meshes with the external gear ring, causing the ring to drive the internal gear ring to mesh with each driven bevel gear. The driven bevel gear drives the threaded drive screw. Since the limiting strip can only slide within the guide groove, the clamping plate can be simultaneously pushed to clamp the wire core. The clamping plate can lead electricity from the lead wire to the electrical equipment. The enclosed clamping structure increases the conductive contact area, and the threaded structure has a self-locking effect in its guiding direction, preventing the threaded structure from loosening.

Description

Technical Field

[0001] This invention relates to the field of cable branch box technology, and specifically to an intelligent cable joint device for a 110kV cable branch box with temperature measurement function. Background Technology

[0002] With the rapid development of my country's economy and the ever-changing urban construction, the use of cables has become quite widespread in the central business districts, main streets, and development zones of large cities due to the limitations of overhead line channels and the government's requirements for improving the environment and beautifying the city. 110kV cable branch boxes have effectively solved the technical problems of 110kV high-voltage cable branch power supply. Their main function is to split or transfer cables, primarily serving as cable splitting and transfer functions. Currently, my country produces a wide variety of 10kV outdoor cable branch boxes. Therefore, the installation and construction of 10kV cable branch boxes have become very important. Whether the operation method of the cable branch box and cable joint installation and connection process is correct, whether the cable head installation process is familiar, the order of assembling the internal components of the cable branch box and the cable joint components, and whether the operation is carried out in accordance with the installation specifications provided by the manufacturer, etc., will all directly affect the service life and normal operation of the cable branch box.

[0003] Cable branching and transfer technologies place very high demands on the connection process of cable joints. When the cable branch box is in operation, high temperatures are easily generated at the cable joints. This is because there is a contact section at the connection of the cable joint. If the clamping force is loose, it will increase the effect of the section. In addition, the existing double-sided clamping structure will also result in a limited connection area at the cable joint, which increases the resistance. Maintenance personnel need to frequently check the temperature of the cable joint to prevent melting, which causes considerable trouble and makes it easy to miss the best time to eliminate dangerous accidents. Therefore, it is very meaningful to design an intelligent cable joint device for 110kV cable branch boxes with temperature measurement function. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] The purpose of this invention is to solve the problem that existing cable splicing and transfer technologies have very high requirements for the connection process at the cable joint. When the cable branch box is in operation, the cable joint is prone to high temperature. This is because there is a contact section at the connection of the cable joint. If the clamping force is loose, it will increase the effect of the section. In addition, the existing double-sided clamping structure will also result in a limited connection area at the cable joint, which increases the resistance. Maintenance personnel need to frequently check the temperature of the cable joint to prevent melting, which causes considerable trouble and makes it easy to miss the best time to eliminate dangerous accidents.

[0006] (2) Technical solution

[0007] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0008] A smart cable connector device for a 110kV cable branch box with temperature measurement function includes a cable branch box body. Multiple assembly cylinders are fixedly inserted into the bottom of the cable branch box body. A sealing and cooling cylinder is fixedly embedded in the middle of each assembly cylinder. A thick cable is inserted through the bottom of the sealing and cooling cylinder. Multiple conductive components are arranged at equal intervals between the sealing and cooling cylinders. A driving component is connected between the conductive components. The driving component is used to drive the multiple conductive components to synchronously approach and clamp the core of the thick cable. One of the conductive components is connected to a temperature measurement circuit.

[0009] Preferably, the conductive component includes a guide cylinder, which is fixedly disposed on the outside of the assembly cylinder. Multiple guide grooves are equidistantly arranged on the inner wall of the guide cylinder. A slider is slidably embedded in the guide cylinder. The outer wall of the slider is provided with the same number of limiting strips corresponding to the guide grooves. A lead screw is fixedly connected to one side of the slider. The lead screw passes through the assembly cylinder and the sealing cooling cylinder in sequence and is connected to a clamping plate.

[0010] Preferably, a sealing gasket is embedded between the lead screw and the side wall of the sealing cooling cylinder, a plug is fixedly connected to one side of the clamping plate, and an insulating sleeve is glued and fixed to one end of the plug. The insulating sleeve is fixedly embedded in the center of the end face of the lead screw, and a lead wire is fixedly embedded in the inner wall of the guide cylinder. After the lead wire passes through the lead screw and the insulating sleeve, its core is in contact with the plug.

[0011] Preferably, all the clamps are designed with an arc shape, and several of the clamps can be enclosed to form a near-circular structure. One of the clamps has an insulated thermistor built in, which is connected in parallel with the voltage detection circuit through a lead wire.

[0012] Preferably, the drive assembly includes a ring, and an internal gear ring is provided on the upper inner wall of the ring. The internal gear ring is meshed with a plurality of driven bevel gears. Each driven bevel gear has a threaded sleeve fixedly fitted at its center. One end of each threaded sleeve is rotatably embedded in the inner wall of the assembly cylinder, and each threaded sleeve is threaded with a lead screw.

[0013] Preferably, the ring is rotatably embedded in the inner wall of the assembly cylinder, and an external toothed ring is provided on the lower outer wall of the ring. The external toothed ring is meshed with a driving bevel gear, and a rotating shaft is fixedly connected to one side of the driving bevel gear. The other end of the rotating shaft passes through the assembly cylinder and is fixedly connected to a rocker handle.

[0014] Preferably, the sealed cooling cylinder has a hollow columnar structure design, with an air inlet fixedly embedded on the top outer wall and an air outlet fixedly embedded on the bottom outer wall. The air guiding directions of the air inlet and air outlet are both tangent to the inner wall of the sealed cooling cylinder.

[0015] Preferably, a guide cover is provided on the bottom wall of the sealed cooling cylinder, and the guide cover is gradually narrowed from bottom to top.

[0016] Beneficial effects:

[0017] A. The intelligent cable joint device of the 110kV cable branch box with temperature measurement function, through the setting of drive components and conductive components, rotates the handle, the handle drives the rotating shaft to rotate, the rotating shaft drives the active bevel gear to rotate, the active bevel gear meshes with the external gear ring, so that the ring drives the internal gear ring to mesh with each driven bevel gear, and the driven bevel gear drives the threaded drive screw. Since the limit bar can only slide in the guide groove, the clamp can be pushed to clamp the wire core at the same time. The clamp can lead the power from the lead wire to the electrical equipment. The enclosed clamping structure increases the conductive contact area, and the thread structure has a self-locking effect in its guiding direction, which can prevent the thread structure from loosening, maintain the clamping force, and thus prevent the connection from loosening and reduce heat generation.

[0018] B. By setting up a sealed cooling cylinder, the exposed wire core is inserted into the sealed cooling cylinder from the guide cover. The thick cable sheath is squeezed against the inner wall of the guide cover, which plays a sealing role. The blower blows dry cold air into the air inlet. After the cold air enters the sealed cooling cylinder, it can form a cyclone, which increases the residence time of the cold air and can fully exchange heat with the wire core and clamp, and remove the high temperature at the connection. The physical cooling method can ensure electrical safety.

[0019] C. Through the setting of the insulation thermistor and control terminal, the thermistor is connected to an external temperature measuring circuit, which can monitor the temperature of the wiring part in real time. If the temperature of the wire core is abnormal, the temperature data information will be sent to the user terminal by the control terminal, so as to notify the staff to come for maintenance. Before the maintenance personnel arrive, the control terminal can control the start and stop of the blower according to the temperature to maintain the temperature at the connection point from not exceeding the safe value, with a high safety factor. Attached Figure Description

[0020] Figure 1 This is a side sectional view of an intelligent cable connector device for a 110kV cable branch box with temperature measurement function according to the present invention.

[0021] Figure 2 This is a side sectional view of the assembly cylinder and the sealed cooling cylinder in the intelligent cable joint device of a 110kV cable branch box with temperature measurement function according to the present invention.

[0022] Figure 3 This is a top cross-sectional view of an intelligent cable joint device for a 110kV cable branch box with temperature measurement function according to the present invention.

[0023] Figure 4 This invention relates to an intelligent cable connector device for a 110kV cable branch box with temperature measurement function. Figure 2 Enlarged view of the structure at point A in the image;

[0024] Figure 5 This invention relates to an intelligent cable connector device for a 110kV cable branch box with temperature measurement function. Figure 2 A cross-sectional view of the structure along the BB direction.

[0025] The attached figures are labeled as follows:

[0026] 1. Cable branch box body; 2. Assembly cylinder; 3. Sealed cooling cylinder; 4. Thick cable; 5. Conductive components; 6. Drive components; 31. Air inlet duct; 32. Air outlet duct; 33. Guide cover; 51. Guide cylinder; 52. Guide groove; 53. Slider; 54. Limiting strip; 55. Lead screw; 56. Clamping plate; 57. Sealing gasket; 58. Insulating sleeve; 59. Lead wire; 61. Ring; 62. Internal gear ring; 63. External gear ring; 64. Driving bevel gear; 65. Rotating shaft; 66. Handle; 67. Driven bevel gear; 68. Threaded sleeve. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] The following is in conjunction with the appendix Figure 1-5 The present invention is further illustrated by the embodiments:

[0029] Reference Figure 1-5 A smart cable connector device for a 110kV cable branch box with temperature measurement function includes a cable branch box body 1. Multiple assembly cylinders 2 are fixedly inserted at the bottom of the cable branch box body 1. A sealing cooling cylinder 3 is fixedly embedded in the middle of each assembly cylinder 2. A thick cable 4 is inserted through the bottom of the sealing cooling cylinder 3. Multiple conductive components 5 are arranged equidistantly between the sealing cooling cylinders 3, and a driving component 6 is connected between the conductive components 5. The driving component 6 is used to drive the multiple conductive components 5 to synchronously approach and clamp the core of the thick cable 4. One of the conductive components 5 is connected to a temperature measurement circuit.

[0030] In this embodiment, the intelligent cable connector device of the 110kV cable branch box with temperature measurement function drives multiple conductive components 5 to clamp the cable core through the drive component 6. Compared with the traditional bidirectional clamping method, the cable core will not undergo excessive deformation, the contact area can be maintained at a large size, reducing the resistance to conduction. Moreover, the temperature measurement circuit can monitor the temperature change at the connection point in real time, eliminating the need for frequent manual inspections. When overheating is detected or during peak electricity consumption periods, cold air can be introduced into the sealed cooling cylinder 3 to cool the cable connector, preventing melting due to excessive temperature and ensuring electrical safety.

[0031] Furthermore, the conductive component 5 includes a guide cylinder 51, which is fixedly disposed on the outside of the assembly cylinder 2. Multiple guide grooves 52 are equidistantly arranged on the inner wall of the guide cylinder 51. A slider 53 is slidably embedded in the guide cylinder 51. The outer wall of the slider 53 is provided with the same number of limiting strips 54 corresponding to the guide grooves 52. A lead screw 55 is fixedly connected to one side of the slider 53. The lead screw 55 passes through the assembly cylinder 2 and the sealing cooling cylinder 3 in sequence and is connected to a clamping plate 56.

[0032] In this embodiment, the driven bevel gear 67 drives the threaded sleeve 68 to drive the screw 55. Since the limiting strip 54 can only slide in the guide groove 52, the clamping plate 56 can be pushed to clamp the wire core at the same time. It is worth noting that the lead wire 59 is set in excess in the guide cylinder 51 to meet the requirements of the screw 55 moving back and forth.

[0033] Furthermore, a sealing gasket 57 is embedded between the lead screw 55 and the side wall of the sealing cooling cylinder 3. A plug is fixedly connected to one side of the clamping plate 56, and an insulating sleeve 58 is glued and fixed to one end of the plug. The insulating sleeve 58 is fixedly embedded in the center of the end face of the lead screw 55. A lead wire 59 is fixedly embedded in the inner wall of the guide cylinder 51. After the lead wire 59 passes through the lead screw 55 and the insulating sleeve 58, its core contacts the plug.

[0034] In this embodiment, the insert is inserted into one end face of the insulating sleeve 58, and the other end of the insulating sleeve 58 is provided with a boss. The boss is embedded in the center groove of the end face of the lead screw 55. The clamp 56 can lead the power from the lead wire 59 to the electrical equipment. The insulating sleeve 58 and the lead screw 55 are bonded with insulating glue, which can prevent the power from being guided to the assembly cylinder 2 and ensure operational safety.

[0035] Furthermore, all of the clamping plates 56 are designed with an arc shape, and several of the clamping plates 56 can be enclosed to form a near-circular structure. One of the clamping plates 56 has an insulated thermistor built in, which is connected in parallel with the voltage detection circuit through a lead 59.

[0036] In this embodiment, the thermistor is connected to an external temperature measuring circuit. The temperature measuring circuit senses temperature changes by detecting changes in voltage or current in the detection circuit. If the temperature at the core is abnormal, the temperature data will be sent to the user terminal by the control terminal, so that staff can be notified to come for maintenance. The arc-shaped clamp 56 can increase the contact area with the core.

[0037] Furthermore, the drive assembly 6 includes a ring 61, and an internal gear ring 62 is provided on the upper inner wall of the ring 61. The internal gear ring 62 is meshed with a plurality of driven bevel gears 67. Each driven bevel gear 67 is fixedly fitted with a threaded sleeve 68 at its center. One end of each threaded sleeve 68 is rotatably embedded in the inner wall of the assembly cylinder 2, and each threaded sleeve 68 is threaded with a lead screw 55.

[0038] In this embodiment, the driven bevel gear 67 drives the threaded sleeve 68 and the threaded drive screw 55. Since the limiting strip 54 can only slide in the guide groove 52, the clamping plate 56 can be pushed to clamp the wire core at the same time. Moreover, the threaded structure has a self-locking function in its guiding direction, which can prevent the threaded structure from loosening and maintain the clamping force.

[0039] Furthermore, the ring 61 is rotatably embedded in the inner wall of the assembly cylinder 2, and an external toothed ring 63 is provided on the lower outer wall of the ring 61. The external toothed ring 63 is meshed with a drive bevel gear 64. A rotating shaft 65 is fixedly connected to one side of the drive bevel gear 64, and a rocker handle 66 is fixedly connected to the other end of the rotating shaft 65 through the assembly cylinder 2.

[0040] In this embodiment, rotating the crank 66 causes the rotating shaft 65 to rotate, which in turn causes the driving bevel gear 64 to rotate. The driving bevel gear 64 meshes with the external gear ring 63, which in turn causes the ring 61 to drive the internal gear ring 62 to mesh with each driven bevel gear 67. The driven bevel gear 67 then drive the threaded sleeve 68 to drive the threaded screw 55, thus enabling one drive to drive multiple transmissions.

[0041] Furthermore, the sealed cooling cylinder 3 is designed as a hollow column structure. An air inlet duct 31 is fixedly embedded on the top outer wall of the sealed cooling cylinder 3, and an air outlet duct 32 is fixedly embedded on the bottom outer wall of the sealed cooling cylinder 3. The air guiding directions of the air inlet duct 31 and the air outlet duct 32 are both tangent to the inner wall of the sealed cooling cylinder 3.

[0042] In this embodiment, the blower blows dry cold air into the air inlet duct 31. After entering the sealed cooling cylinder 3, the cold air can flow along the arc-shaped inner wall of the sealed cooling cylinder 3, thereby forming a cyclone, which increases the residence time of the cold air and allows it to fully exchange heat with the wire core and clamp 56, carrying away the high temperature at the connection.

[0043] Furthermore, a guide cover 33 is provided on the bottom wall of the sealed cooling cylinder 3, and the guide cover 33 is gradually narrowed from bottom to top.

[0044] In this embodiment, the exposed wire core is inserted into the guide cover 33. The end of the wire core can be deformed by pressure to correct its direction. Specifically, the radius of the narrowest part of the guide cover 33 is the same as the radius of the wire core. When the wire core is inserted to a certain depth, the outer sheath of the thick cable 4 is squeezed against the inner wall of the guide cover 33, which can play a sealing role.

[0045] Working principle: In use, first strip the insulation from the ends of the thick cable 4, and insert the exposed core into the sealed cooling cylinder 3 through the guide cover 33. The outer sheath of the thick cable 4 is pressed against the inner wall of the guide cover 33, which acts as a seal. Then, turn the crank handle 66, which drives the rotating shaft 65 to rotate. The rotating shaft 65 drives the driving bevel gear 64 to rotate. The driving bevel gear 64 meshes with the external gear ring 63, which causes the ring 61 to drive the internal gear ring 62 to mesh with each driven bevel gear 67. The driven bevel gear 67 drives the threaded sleeve 68 and the threaded drive screw 55. Since the limiting strip 54 can only slide within the guide groove 52, the clamping plate 56 can be pushed to clamp the core simultaneously. The clamping plate 56 can lead the power from the lead wire 59 to the electrical equipment, and the threaded... The structure has a self-locking function in its guiding direction, which can prevent the threaded structure from loosening, maintain clamping force, thereby increasing the conductive contact area and reducing heat generation. One of the clamping plates 56 has an insulated thermistor built in, and the thermistor is connected to an external temperature measuring circuit. If the temperature at the core is abnormal, the temperature data information will be sent to the user terminal by the control terminal, so that the staff can be notified to come for maintenance. At the same time, the control terminal controls the blower to blow dry cold air into the air inlet duct 31. After the cold air enters the sealed cooling duct 3, it can form a cyclone, which increases the residence time of the cold air and can fully exchange heat with the core and clamping plate 56, carrying away the high temperature at the connection. Before the maintenance personnel arrive, the temperature at the connection can be maintained below the safe value.

[0046] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of the present invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An intelligent cable joint device of 110 kV cable branch box with temperature measurement function, comprising a cable branch box body (1), characterized in that, The bottom of the cable branch box body (1) is fixedly inserted with multiple assembly cylinders (2), and each assembly cylinder (2) is fixedly embedded with a sealing cooling cylinder (3). A thick cable (4) is inserted through the bottom of the sealing cooling cylinder (3). Multiple conductive components are arranged equidistantly on the sealing cooling cylinder (3), and a driving component is connected between the conductive components (5). The driving component is used to drive the multiple conductive components to synchronously approach and clamp the core of the thick cable (4). One of the conductive components is connected to a temperature measuring circuit. The conductive component includes a guide cylinder (51). 1) Fixedly installed on the outside of the assembly cylinder (2), the inner wall of the guide cylinder (51) is provided with multiple guide grooves (52) at equal intervals, a slider (53) is slidably embedded in the guide cylinder (51), the outer wall of the slider (53) is provided with the same number of limiting strips (54) corresponding to the guide grooves (52), a lead screw (55) is fixedly connected to one side of the slider (53), the lead screw (55) passes through the assembly cylinder (2) and the sealing cooling cylinder (3) in sequence and is connected to a clamping plate (56); a sealing gasket (57) is embedded between the lead screw (55) and the side wall of the sealing cooling cylinder (3), the A plug is fixedly connected to one side of the clamp (56), and an insulating sleeve (58) is glued and fixed to one end of the plug. The insulating sleeve (58) is fixedly embedded in the center of the end face of the lead screw (55). A lead wire (59) is fixedly embedded in the inner wall of the guide cylinder (51). After the lead wire (59) passes through the lead screw (55) and the insulating sleeve (58), its core contacts the plug. The drive assembly includes a ring (61). An internal gear ring (62) is provided on the upper inner wall of the ring (61). The internal gear ring (62) is meshed with multiple driven bevel gears (67). The driven bevel gears (67) are connected to the drive assembly. The center of each part is fixedly fitted with a threaded sleeve (68), one end of which is rotatably embedded in the inner wall of the assembly cylinder (2), and a screw (55) is threadedly connected inside the threaded sleeve (68); the ring (61) is rotatably embedded in the inner wall of the assembly cylinder (2), and an external toothed ring (63) is provided on the lower outer wall of the ring (61). The external toothed ring (63) is meshed with a drive bevel gear (64), and a rotating shaft (65) is fixedly connected to one side of the drive bevel gear (64). The other end of the rotating shaft (65) passes through the assembly cylinder (2) and is fixedly connected to a rocker handle (66).

2. The intelligent cable joint device with temperature measurement function for 110kV cable branch box according to claim 1, characterized in that: The clamps (56) are all designed with an arc shape, and several clamps (56) can be enclosed to form a near-circular structure. One of the clamps (56) has an insulated thermistor built in, which is connected in parallel with the voltage detection circuit through a lead (59).

3. The intelligent cable joint device with temperature measurement function for 110 kV cable branch box according to claim 1, characterized in that: The sealed cooling cylinder (3) is designed as a hollow column structure. An air inlet cylinder (31) is fixedly embedded on the top outer wall of the sealed cooling cylinder (3), and an air outlet cylinder (32) is fixedly embedded on the bottom outer wall of the sealed cooling cylinder (3). The air guiding directions of the air inlet cylinder (31) and the air outlet cylinder (32) are tangent to the inner wall of the sealed cooling cylinder (3).

4. The intelligent cable joint device with temperature measurement function for 110 kV cable branch box according to claim 3, characterized in that: The bottom wall of the sealing cooling cylinder (3) is provided with a guide cover (33), which is gradually narrowed from bottom to top.

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