Remote intelligent current monitoring system for power distribution system

Abstract

The invention discloses a current monitoring system for a remote intelligent power distribution system, and relates to the technical field of current monitoring. The device comprises two mounting side plates, a supporting plate is fixedly mounted between the two mounting side plates, two parallel conductive sliding rails and two parallel guide sliding rods are fixedly mounted on the supporting plate, a sliding frame is slidably mounted between the two guide sliding rods, and a conductive shaft is rotatably mounted on the sliding frame; a conductive disc is fixedly mounted on the conductive shaft; wherein a supporting conductive plate is slidably installed between the two conductive sliding rails, the conductive disc is rotatably installed on the supporting conductive plate, and the circle center of the conductive disc and the gravity center of the supporting conductive plate are arranged in an overlapped mode. The two long edges of the supporting conductive plate are in sliding conductive fit with the two conductive sliding rails. The center positions of the two short edges of the supporting current-conducting plate are fixedly provided with electricity leading contacts, the center position of one long edge of the supporting current-conducting plate is fixedly provided with an electric brush, and the electric brush is in sliding conductive fit with the circumferential surface of the current-conducting disc.

Description

Technical Field

[0001] The present invention relates to the technical field of current monitoring, and in particular to a current monitoring system for a remote intelligent power distribution system. Background Art

[0002] In existing current monitoring systems, most use a single detection structure and only include one sensing path in the design. Once the sensing element ages, becomes dislocated, or its sensitivity decreases due to environmental interference, the overall current measurement of the system will be inaccurate or even fail completely, seriously affecting the monitoring stability of the distribution system.

[0003] Especially in remote or complex deployment environments, such as unmanned sites, underground cable tunnels, or long-distance distribution networks, the reliability of the monitoring system itself becomes a primary concern. Existing single-path current monitoring technology cannot achieve self-replacement. If the primary path fails, the entire system must be shut down for maintenance, which fails to meet the fundamental requirements of modern intelligent power distribution systems for redundancy, remoteness, stability, and continuous operation.

[0004] In summary, existing technologies have serious defects in redundant path design, switching control mechanism, remote response capability, etc. There is an urgent need for a new current monitoring system with high structural integration, multi-mode sensing paths, and remote dynamic switching. Summary of the Invention

[0005] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: a current monitoring system for a remote intelligent power distribution system, comprising two mounting side plates, a support plate fixedly mounted between the two mounting side plates, two parallel conductive slide rails and two parallel guide slide bars fixedly mounted on the support plate, wherein a sliding frame is slidably mounted between the two guide slide bars, a conductive shaft is rotatably mounted on the sliding frame, and a conductive disk is fixedly mounted on the conductive shaft; wherein a supporting conductive plate is slidably mounted between the two conductive slide rails, the conductive disk is rotatably mounted on the supporting conductive plate, and the center of the conductive disk is overlapped with the center of gravity of the supporting conductive plate; the two long sides of the supporting conductive plate are in sliding and conductive cooperation with the two conductive slide rails; the center positions of the two short sides of the supporting conductive plate are fixedly mounted with power leads, and the center position of one of the long sides of the supporting conductive plate is fixedly mounted with a brush, and the brush is in sliding and conductive cooperation with the circumferential surface of the conductive disk.

[0006] Preferably, a protective cover is buckled and installed on the mounting side plate, and a rubber pad is fixed on the side of the protective cover facing the cable to be tested, and the rubber pad is in contact and friction fit with the surface of the cable to be tested; the two mounting side plates are fixedly sleeved on the cable surface through corresponding fixing rings (the fixing rings and the mounting side plates are fixed by screws).

[0007] Preferably, four pulleys are also rotatably mounted on the support plate, and every two pulleys are connected by a friction transmission belt. The length of the friction transmission belt is preferably, and a central friction wheel is also rotatably mounted on the sliding frame. The central friction wheel is fixedly matched with the conductive shaft, and the conductive disk and the central friction wheel are coaxially fixedly transmitted through the conductive shaft; wherein the central friction wheel is arranged between the two friction transmission belts, and the circumferential surface of the central friction wheel is frictionally and rollingly matched with the two friction transmission belts.

[0008] Preferably, a driving bracket is also fixedly mounted on the support plate, and an active gear ring and a passive gear ring are rotatably mounted on the driving bracket, and an active center gear and a passive center gear are respectively provided at the center positions of the active gear ring and the passive gear ring, wherein the active center gear and the passive center gear are both rotatably mounted on the support plate, and the passive center gear is fixedly connected to the corresponding pulley through a rotating shaft, and the active center gear and the corresponding pulley are fixedly connected to the output shaft of the driving motor (these two pulleys are symmetrically arranged and arranged on both sides of the two guide slides).

[0009] Preferably, the driving gear ring and the driving central gear are meshed and driven by three driving planetary gears, the passive gear ring and the passive central gear are meshed and driven by three passive planetary gears, and the driving gear ring and the passive gear ring are connected by a same-direction transmission belt.

[0010] Preferably, a passive planetary disk coaxially arranged with the passive gear ring is fixedly mounted on the driving bracket, and a switching planetary disk coaxially arranged with the active gear ring is rotatably mounted on the driving bracket. All active planetary gears are rotatably mounted on the switching planetary disk, and all passive planetary gears are rotatably mounted on the passive planetary disk.

[0011] Preferably, a through hole is provided on the driving bracket, and an electromagnet is slidably installed in the through hole, and the electromagnet and the switching planetary disk are magnetically frictionally engaged. A driving motor is also fixedly installed on the driving bracket, and the output shaft of the driving motor is fixedly engaged with the active center gear and the pulley (the electromagnet slides in the through hole on the driving bracket, and a block is provided in the through hole to limit the electromagnet from sliding out of the through hole, wherein the rotational resistance of the passive center gear is greater than the rotational resistance of the switching planetary disk).

[0012] Preferably, two limit switches are fixedly mounted on the support plate, the two limit switches are in contact with the support conductive plate, and the two limit switches are used to control the forward and reverse rotation of the output shaft of the drive motor.

[0013] Compared with the prior art, the present invention has the following advantages: (1) The present invention integrates three current monitoring methods: static induction of the supporting conductive plate, rotational induction of the conductive disk, and reciprocating linear motion induction of the conductive plate. Each detection method can independently complete the current measurement and can also serve as a backup for each other. When the performance of any detection structure degrades due to the external environment or aging of the components, the system can enter other working modes by switching the electromagnet control structure to maintain continuous monitoring capabilities, significantly improving the stability and reliability of the current detection system. It is a structure with fault self-adaptation and redundant protection capabilities; (2) The present invention uses electromagnets and drive motors to cooperate, and can realize intelligent switching between different working states through remote control signals. For example, the static or reciprocating motion of the conductive plate and the start and stop rotation of the conductive disk can all be remotely automatically controlled and adjusted in mode. This capability makes the system suitable for remote deployment, remote diagnosis and remote management applications in large-scale distribution networks, greatly improving the practicality and response efficiency of the system in modern intelligent power distribution; (3) In the present invention, the conductive disk is driven to rotate by a drive motor, and the speed at which its rotation cuts the magnetic field is controllable. Combined with the potential difference measurement method between the conductive shaft and the brush, it can monitor small current cables by increasing the rotation speed, and can achieve a wider current monitoring range. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the rubber pad of the present invention.

[0016] Figure 3 This is a structural diagram of the support plate of the present invention.

[0017] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0018] Figure 5 This is a structural diagram of the driving bracket of the present invention.

[0019] Figure 6 This is a schematic diagram of the supporting conductive plate structure of the present invention.

[0020] Figure 7 It is a schematic diagram of the friction transmission belt structure of the present invention.

[0021] Figure 8 It is a structural schematic diagram of the electromagnet of the present invention.

[0022] Figure 9 It is a structural diagram of the active central gear of the present invention.

[0023] In the figure: 101-mounting side plate; 102-protective cover; 103-fixing ring; 104-support plate; 105-conductive slide rail; 106-support conductive plate; 107-conductive disk; 108-conductive shaft; 109-leading contact; 110-brush; 111-limit switch; 112-guide slide rod; 113-friction transmission belt; 114-sliding frame; 115-center friction wheel; 116-pulley; 117-drive bracket; 118-drive motor; 119-passive planetary disk; 120-electromagnet; 121-switching planetary disk; 122-driving planetary gear; 123-driving sun gear; 124-passive sun gear; 125-passive planetary gear; 126-driving gear ring; 127-co-directional transmission belt; 128-passive gear ring; 129-rubber pad. DETAILED DESCRIPTION

[0024] The following is combined with Figures 1-9 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0025] The present invention provides a current monitoring system for a remote intelligent power distribution system, comprising two mounting side plates 101, a support plate 104 fixedly mounted between the two mounting side plates 101, two parallel conductive slide rails 105 and two parallel guide slide bars 112 fixedly mounted on the support plate 104, wherein a sliding frame 114 is slidably mounted between the two guide slide bars 112, a conductive shaft 108 is rotatably mounted on the sliding frame 114, and a conductive disk 107 is fixedly mounted on the conductive shaft 108; wherein the sliding frame 114 is slidably mounted between the two conductive slide rails 105 and the conductive shaft 108 is rotatably mounted on the conductive shaft 108. A supporting conductive plate 106 is rotatably mounted, and a conductive disk 107 is rotatably mounted on the supporting conductive plate 106, with the center of the conductive disk 107 overlapping the center of gravity of the supporting conductive plate 106. The two long sides of the supporting conductive plate 106 slide and conduct with the two conductive slide rails 105. A power contact 109 is fixedly mounted at the center of each of the two short sides of the supporting conductive plate 106, and a brush 110 is fixedly mounted at the center of one of the long sides of the supporting conductive plate 106. The brush 110 slides and conducts with the circumferential surface of the conductive disk 107. A protective cover 102 is buckled and mounted on the mounting side plate 101. A rubber pad 129 is fixed on the side of the protective cover 102 facing the cable to be tested, and the rubber pad 129 contacts and frictionally engages with the surface of the cable to be tested. The two mounting side plates 101 are fixedly sleeved on the cable surface via corresponding fixing rings 103 (the fixing rings 103 and the mounting side plates 101 are fixed with screws). Four pulleys 116 are also rotatably mounted on the support plate 104. Each pair of pulleys 116 is connected by a friction belt 113. The length of the friction belt 113 is arranged parallel to the axis of the guide slide 112, and the two friction belts 113 are arranged symmetrically and in parallel. A central friction wheel 115 is also rotatably mounted on the slide frame 114. The central friction wheel 115 is fixedly engaged with the conductive shaft 108, and the conductive disc 107 and the central friction wheel 115 are coaxially fixedly engaged with the conductive shaft 108. The central friction wheel 115 is positioned between the two friction belts 113, and its circumferential surface engages in frictional rolling engagement with the two friction belts 113.

[0026] A drive bracket 117 is also fixedly mounted on the support plate 104. A driving ring gear 126 and a passive ring gear 128 are rotatably mounted on the drive bracket 117. A driving central gear 123 and a passive central gear 124 are respectively disposed at the center of the driving ring gear 126 and the passive ring gear 128. Both the driving central gear 123 and the passive central gear 124 are rotatably mounted on the support plate 104. The passive central gear 124 is fixedly connected to the corresponding pulley 116 via a rotating shaft. The driving central gear 123 and the corresponding pulley 116 are fixedly connected to each other via the output shaft of the drive motor 118 (these two pulleys 116 are symmetrically arranged and disposed on either side of the two guide slides 112). The driving ring gear 126 and the driving central gear 123 are meshed with each other via three driving planetary gears 122. The passive ring gear 128 and the passive central gear 124 are meshed with each other via three passive planetary gears 125. The driving ring gear 126 and the passive ring gear 128 are connected to each other via a co-directional transmission belt 127.

[0027] A passive planetary disc 119 coaxially arranged with the passive gear ring 128 is also fixedly mounted on the drive bracket 117. A switching planetary disc 121 coaxially arranged with the active gear ring 126 is also rotatably mounted on the drive bracket 117. All active planetary gears 122 are rotatably mounted on the switching planetary disc 121, and all passive planetary gears 125 are rotatably mounted on the passive planetary disc 119. A through-hole is provided on the drive bracket 117, in which an electromagnet 120 is slidably mounted. The electromagnet 120 and the switching planetary disc 121 are in magnetic friction engagement. A drive motor 118 is also fixedly mounted on the drive bracket 117, and the output shaft of the drive motor 118 is fixedly engaged with the active central gear 123 and the pulley 116 (the electromagnet 120 slides in the through-hole on the drive bracket 117, and a block is provided in the through-hole to limit the electromagnet 120 from sliding out of the through-hole, wherein the rotational resistance of the passive central gear 124 is greater than the rotational resistance of the switching planetary disc 121). Two limit switches 111 are fixedly mounted on the support plate 104 . The two limit switches 111 are in contact with the supporting conductive plate 106 . The two limit switches 111 are used to control the forward and reverse rotation of the output shaft of the drive motor 118 .

[0028] The working principle of the current monitoring system for a remote intelligent power distribution system disclosed in the present invention is as follows: the mounting side plate 101 is fixed to the surface of the cable to be tested (a cable with an insulation layer) through the fixing ring 103, so that the rubber pad 129 contacts and rubs against the cable surface to prevent the mounting side plate 101 from shaking on the cable. When in use, a stable DC power supply is applied to the two power-inducing contacts 109, and electrons will move from one of the power-inducing contacts 109 along the supporting conductive plate 106 and the conductive disk 107 to the other power-inducing contact 109. When current passes through the cable (single battery cell), a magnetic field is generated around it. The magnetic field passes vertically through the supporting conductive plate 106 and the conductive disk 107, so that the electrons moving inside the supporting conductive plate 106 and the conductive disk 107 are offset by the Lorentz force, which will cause a potential difference between the two long sides of the supporting conductive plate 106, so there will be a flow of electrons. The potential difference between the two conductive rails 105 can be measured because the potential difference between the two long sides of the supporting conductive plate 106 is related to the Lorentz force on the electrons, and the Lorentz force on the electrons is related to the magnetic field strength, and the magnetic field strength is related to the current in the cable. Therefore, the greater the current in the cable to be tested, the greater the potential difference between the two conductive rails 105.In addition, the user can also start the drive motor 118 and the electromagnet 120. The electromagnet 120 and the drive motor 118 are started at the same time. The electromagnet 120 generates magnetic force and attracts friction with the switching planetary disk 121, so that the switching planetary disk 121 cannot rotate on the drive bracket 117. At this time, the output shaft of the drive motor 118 drives the active center gear 123 and the corresponding pulley 116 to rotate (the output shaft of the drive motor 118 rotates through the switching planetary disk 121 and rotates in coordination with the switching planetary disk 121). The rotation of the pulley 116 drives the corresponding friction transmission belt 113 to rotate. At the same time, the rotation of the active center gear 123 will drive the active gear ring 126 to rotate through the active planetary gear 122. The rotation of the active gear ring 126 drives the passive gear ring 128 to rotate through the same-direction transmission belt 127. The rotation of the passive gear ring 128 drives the passive center gear 124 to rotate through the passive planetary gear 125. The passive center gear 124 drives the corresponding pulley 116 to rotate, and then drives another friction transmission belt 113 to rotate. At this time, the two friction transmission belts 113 rotate in the same direction, and because the central friction wheel 115 is disposed between the two friction transmission belts 113, the transmission directions of the contact points between the two friction transmission belts 113 and the central friction wheel 115 are opposite. At this time, the central friction wheel 115 rotates in place between the two friction transmission belts 113. The rotation of the central friction wheel 115 drives the conductive shaft 108 to rotate, and the rotation of the conductive shaft 108 drives the conductive disk 107 to rotate. The rotation of the conductive disk 107 cuts the magnetic field around the cable, resulting in a potential difference between the edge and the center of the conductive disk 107. By measuring the potential difference between the conductive shaft 108 and the brush 110, the magnitude of the current in the cable under test can be determined (the conductive disk 107 is driven by the drive motor 118, so the rotation speed of the conductive disk 107 is known, and the potential difference between the conductive shaft 108 and the brush 110 is only proportional to the magnitude of the current in the cable; it should be noted that the conductive shaft 108 and the conductive disk 107 are electrically fixed). In addition, the electromagnet 120 can also be powered off. The electromagnet 120 will exert magnetic force and will not hinder the rotation of the switching planetary plate 121. At this time, the output shaft of the drive motor 118 drives the active center gear 123 to rotate. The rotation of the active center gear 123 will drive the active planetary gear 122 to revolve. This is because the active planetary gear 122 cannot drive the active gear ring 126, the co-directional transmission belt 127, the passive planetary gear 125, and the passive center gear 124 to rotate. There is transmission resistance. At this time, the active planetary gear 122 will idle and drive the switching planetary plate 121 to rotate together.At this point, only one set of pulleys 116 rotates, and thus only one friction belt 113 rotates. The friction belt 113 then drives the central friction wheel 115 to roll on the other friction belt 113. This causes the central friction wheel 115 to move axially along the guide rail 112, causing the sliding frame 114 to slide against the guide rail 112, and the supporting conductive plate 106 to follow suit. (When the supporting conductive plate 106 contacts the limit switch 111, the output shaft of the drive motor 118 is controlled to rotate in the opposite direction, driving the supporting conductive plate 106 toward the other limit switch 111, thereby achieving reciprocating periodic motion of the supporting conductive plate 106.) At this point, the supporting conductive plate 106 cuts through the magnetic field surrounding the cable in a linear motion, causing a potential difference between the two conductive rails 105. By measuring this potential difference between the two conductive rails 105, the current in the cable can be determined. Three redundant current monitoring systems ensure the stability and reliability of the current monitoring system.

Claims

1. A current monitoring system for a remote intelligent power distribution system, characterized by: The invention comprises two mounting side plates (101), a support plate (104) fixedly mounted between the two mounting side plates (101), two parallel conductive slide rails (105) and two parallel guide slide bars (112) fixedly mounted on the support plate (104), a sliding frame (114) slidably mounted between the two guide slide bars (112), a conductive shaft (108) rotatably mounted on the sliding frame (114), and a conductive disk (107) fixedly mounted on the conductive shaft (108); A supporting conductive plate (106) is slidably mounted between the two conductive slide rails (105), a conductive disk (107) is rotatably mounted on the supporting conductive plate (106), and the center of the conductive disk (107) is arranged to overlap with the center of gravity of the supporting conductive plate (106); The two long sides of the supporting conductive plate (106) are in sliding and conductive cooperation with the two conductive slide rails (105); the center positions of the two short sides of the supporting conductive plate (106) are fixedly mounted with power-leading contacts (109); the center position of one of the long sides of the supporting conductive plate (106) is fixedly mounted with a brush (110); the brush (110) is in sliding and conductive cooperation with the circumferential surface of the conductive disk (107).

2. A remote intelligent current monitoring system for power distribution system according to claim 1, characterized in that: A protective cover (102) is buckled and mounted on the mounting side plate (101); a rubber pad (129) is fixed on the side of the protective cover (102) facing the cable to be tested; the rubber pad (129) is in contact with and frictionally engaged with the surface of the cable to be tested; and the two mounting side plates (101) are fixedly sleeved on the cable surface via corresponding fixing rings (103).

3. A remote intelligent power distribution system current monitoring system according to claim 2, characterized in that: Four pulleys (116) are also rotatably mounted on the support plate (104), and each two pulleys (116) are connected to each other via a friction transmission belt (113). The length arrangement direction of the friction transmission belt (113) is arranged parallel to the axis of the guide slide bar (112), and the two friction transmission belts (113) are symmetrically and parallelly arranged.

4. A current monitoring system for a remote intelligent power distribution system according to claim 3, characterized in that: A central friction wheel (115) is also rotatably mounted on the sliding frame (114). The central friction wheel (115) is fixedly engaged with the conductive shaft (108). The conductive disk (107) and the central friction wheel (115) are coaxially fixedly driven via the conductive shaft (108). The central friction wheel (115) is arranged between two friction transmission belts (113). The circumferential surface of the central friction wheel (115) is frictionally engaged with the two friction transmission belts (113).

5. A current monitoring system for a remote intelligent power distribution system according to claim 4, characterized in that: A driving bracket (117) is also fixedly mounted on the support plate (104), and a driving gear ring (126) and a passive gear ring (128) are rotatably mounted on the driving bracket (117). A driving center gear (123) and a passive center gear (124) are respectively provided at the center positions of the driving gear ring (126) and the passive gear ring (128), wherein the driving center gear (123) and the passive center gear (124) are both rotatably mounted on the support plate (104), and the passive center gear (124) is fixedly connected to the corresponding pulley (116) via a rotating shaft, and the driving center gear (123) and the corresponding pulley (116) are fixedly connected to each other via an output shaft of the drive motor (118).

6. A current monitoring system for a remote intelligent power distribution system according to claim 5, characterized in that: The driving gear ring (126) and the driving central gear (123) are meshed and driven by three driving planetary gears (122), the passive gear ring (128) and the passive central gear (124) are meshed and driven by three passive planetary gears (125), and the driving gear ring (126) and the passive gear ring (128) are connected to each other through a unidirectional transmission belt (127).

7. A current monitoring system for a remote intelligent power distribution system according to claim 6, characterized in that: A passive planetary disc (119) coaxially arranged with the passive gear ring (128) is fixedly mounted on the driving bracket (117). A switching planetary disc (121) coaxially arranged with the active gear ring (126) is rotatably mounted on the driving bracket (117). All active planetary gears (122) are rotatably mounted on the switching planetary disc (121), and all passive planetary gears (125) are rotatably mounted on the passive planetary disc (119).

8. The current monitoring system for a remote intelligent power distribution system according to claim 7, characterized in that: A through hole is provided on the driving bracket (117), and an electromagnet (120) is slidably mounted in the through hole. The electromagnet (120) and the switching planetary disc (121) are magnetically attracted and frictionally matched. A driving motor (118) is also fixedly mounted on the driving bracket (117), and an output shaft of the driving motor (118) is fixedly matched with the driving central gear (123) and the pulley (116).

9. A current monitoring system for a remote intelligent power distribution system according to claim 8, characterized in that: Two limit switches (111) are fixedly mounted on the support plate (104), and the two limit switches (111) are in contact with the supporting conductive plate (106). The two limit switches (111) are used to control the forward and reverse rotation of the output shaft of the drive motor (118).

Images