Bypass device for replacing combined junction box without power cut and control method

Abstract

The invention discloses a bypass device capable of replacing a combined junction box without power cut and a control method, and mainly relates to the technical field of three-phase electric meter wiring control. Comprising a monitoring indication mechanism, a bare wire end insulation clamp mechanism, a secondary current temporary short circuit and measurement clamp mechanism and a working short circuit bridge mechanism, the monitoring indication mechanism comprises a data processing module, a data receiving module and a data display module, and the data processing module is in data connection with the data receiving module and the data display module. The data receiving module is in data connection with the bare wire end insulation clamp mechanism, the secondary current temporary short circuit and measurement clamp mechanism and the working short circuit bridge mechanism. The combined junction box has the beneficial effects that the combined junction box has the characteristics of process indication, state monitoring, reliable connection, high safety and the like, the combined junction box can be replaced without power failure, and the power utilization experience of power consumers is improved.

Description

Technical Field

[0001] The invention relates to the technical field of three-phase electric meter wiring control, in particular to a bypass device and a control method for replacing a combined junction box without power outage. Background Art

[0002] At present, when the electric energy meter connected to the transformer is used in the power grid for electric energy measurement, a joint (test) junction box is required to connect the electric energy meter and the transformer to achieve live replacement of the electric energy meter. During use, the junction box will gradually experience insulation aging, screw stripping, falling off and other faults, affecting its normal use and need to be replaced in time.

[0003] In order to ensure that the current transformer is not open-circuited and the voltage transformer is not short-circuited during the replacement process, under existing technical conditions, the power supply must be disconnected and the power must be cut off to replace the junction box. Although this can ensure safety, it is increasingly unable to meet the power users' demand for power quality.

[0004] Therefore, there is an urgent need for a bypass device and a control method for replacing a combined junction box without power outage to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a bypass device and control method for replacing a combined junction box without power outage. The device has the characteristics of process indication, status monitoring, reliable connection, high safety, etc. The combined junction box can be replaced without power outage, thereby improving the power consumption experience of power users.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] Provided is a bypass device for replacing a combined junction box without power outage, comprising a monitoring and indicating mechanism, a bare wire end insulation clamp mechanism, a secondary current temporary short-circuit and measurement clamp mechanism, and a working short-circuit bridge mechanism, wherein the monitoring and indicating mechanism comprises a data processing module, a data receiving module, and a data display module, wherein the data processing module is respectively data-connected to the data receiving module and the data display module, and the data receiving module is respectively data-connected to the bare wire end insulation clamp mechanism, the secondary current temporary short-circuit and measurement clamp mechanism, and the working short-circuit bridge mechanism.

[0008] Preferably, the main body of the bare wire end insulation clamp mechanism is a cylindrical clamp and is provided with a cable connected to a monitoring and indicating mechanism, and the cylindrical clamp is used for measuring and short-circuiting loops.

[0009] Preferably, the secondary current temporary short-circuiting and measuring fixture mechanism is specifically a clamp-shaped fixture structure, which is provided with an insulating layer and is used to short-circuit the secondary circuit current of each phase on the incoming line side of the junction box. The clamp-shaped fixture structure is also provided with a current measuring clamp for measuring the voltage and current of the current circuit.

[0010] Preferably, the working short-circuiting bridge mechanism includes two bare wire end insulation clamps and cables, which are used to short-circuit the secondary circuit current of each phase on the incoming line side of the junction box for a long time, and establish a stable short-circuit bypass by short-circuiting the bare wire ends.

[0011] A control method for a bypass device applied to the above-mentioned non-power-off replacement of a combined junction box is provided, comprising the following steps:

[0012] S1: The data receiving module of the monitoring indicator mechanism collects data information of the bare wire end insulation clamp mechanism, the secondary current temporary short-circuit and measurement clamp mechanism, and the working short-circuit bridge mechanism;

[0013] S2: The data receiving module sends the collected data new message to the data processing module for data analysis and processing;

[0014] S3: The data processing module sends the analysis and processing results to the data display module for data display.

[0015] Preferably, in step S1, data information of the bare wire end insulation clamp mechanism, the secondary current temporary short-circuit and measurement clamp mechanism, and the working short-circuit bridge mechanism are collected, specifically:

[0016] Collect the measurement results sent by the bare wire end insulation clamp mechanism and the information on whether the circuit is short-circuited;

[0017] Collect the voltage and current information of the current loop sent by the temporary short circuit of the secondary current and the measuring fixture mechanism;

[0018] A control method for collecting the secondary circuit current information of each phase on the incoming line side of the junction box sent by a working shorting bridge control mechanism.

[0019] Preferably, the step S2 is specifically as follows: analyzing the status of each process in establishing the loop bypass, providing a complete indication signal, recording the entire process as supporting evidence, process implementation and inspection, and stable establishment of the bypass loop, monitoring vital signs, short-circuiting the grounding loop when necessary to maintain the loop current so as not to generate current transformer short-circuit high voltage, and outputting vital sign signals or alarm signals.

[0020] Preferably, the step S3 specifically includes: transmitting the indication signal, vital sign and alarm signal to the data display module for data display.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. It has the characteristics of process indication, status monitoring, reliable connection, high safety, etc. The joint junction box can be replaced without power outage (keeping the current transformer from open circuit and the voltage transformer from short circuit), improving the power consumption experience of power users;

[0023] 2. The insulation sheath of the secondary circuit conductor is hardly damaged, which greatly increases the life of the insulation layer of the secondary circuit conductor. The spare bridge greatly improves the reliability of bypass construction, ensuring that no breakdown or sudden increase in voltage occurs during the operation process, ensuring the safety of equipment and personnel;

[0024] 3. The self-sealing insulating clamp is used. When removing and connecting the bare wire end under power, it will not touch the conductive dangerous positions such as the human body or the metal box. The whole work is in an insulating state, which further ensures personal safety.

[0025] 4. The wide-aperture self-locking insulation clamp can adapt to various wire diameters and meet the needs of various energy metering access sites;

[0026] 5. The whole process is under system detection and recording (wave recording). The voltage, current, time, vital signs, etc. of each circuit and endpoint are monitored throughout the process, and data is retained, which can be used for process and procedure analysis, and as relevant data evidence;

[0027] 6. It is highly expandable. Other devices can be inserted into the monitoring indicator. For example, it can be connected to an electric energy meter. When the electric energy meter is replaced, the power grid can still measure the power, and the power grid does not lose statistical power. For example, it can be connected to a high-voltage negative control tripping circuit or an alarm device. When an abnormal electric shock occurs to a human body, an alarm can be sounded and the power can be immediately tripped and cut off.

[0028] 7. The bridging equipment can be extended to meet other operational requirements of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a wiring diagram of an electric energy meter of the present invention.

[0030] Figure 2 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0032] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0033] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meanings of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0034] Example:

[0035] This embodiment provides a bypass device for replacing a combined junction box without power outage, such as Figure 1 As shown, it includes a monitoring and indicating mechanism, a bare wire end insulation clamp mechanism, a secondary current temporary short-circuit and measurement clamp mechanism, and a working short-circuit bridge mechanism. The monitoring and indicating mechanism includes a data processing module, a data receiving module, and a data display module. The data processing module is respectively data-connected to the data receiving module and the data display module. The data receiving module is respectively data-connected to the bare wire end insulation clamp mechanism, the secondary current temporary short-circuit and measurement clamp mechanism, and the working short-circuit bridge mechanism.

[0036] Among them, the monitoring and indicating mechanism is specifically a detection indicator, which is used to be connected to various types of fixtures and short-circuit bridges, accept inputs from fixtures and short-circuit bridges, analyze the status of each process in the establishment of the loop bypass, provide complete indication signals, and record the entire process as supporting data, process implementation and inspection, and stable establishment of the bypass loop, monitor vital signs, short-circuit the grounding loop when necessary to maintain the loop current so as not to generate current transformer short-circuit high voltage, and output vital sign signals or alarm signals. In particular, it is highly scalable and other devices can be inserted, such as an electric energy meter. When replacing the electric energy meter, the electricity can still be measured without losing the statistical electricity. Another example is a high-voltage negative control tripping circuit or alarm device, which can alarm and immediately trip and cut off the power when an abnormal human electric shock occurs;

[0037] The bare wire end insulation clamp mechanism has a cylindrical clamp as the main body and a cable connected to the monitoring indicator. The exterior is insulated, with an insulation level of 6kV, and has a built-in metal electrode for 1-6mm2 wires that can be adaptively clamped for measurement and short-circuit loops. The planes at both ends of the clamp can be automatically blocked (not completely blocked at one time, but can be opened again), and there are anti-slip measures during automatic blocking to prevent the bare end from being pulled out of the insulation clamp by a small amount of external force. When in use, when removing the secondary circuit line from the old junction box, first use the clamp to clamp the insulating outer skin of the secondary circuit, remove the crimping screws of the junction box, pull the secondary circuit line out of the junction box, gradually pull it into the clamp, and automatically block the bare conductor end of the secondary circuit line just as it completely enters the clamp, forming a sheath that completely isolates the bare conductor end from the outside world, and connects the measured signal to the monitoring indicator through the cable. The signal obtained by the indicator determines whether the access is reliable, normal or abnormal, and serves as a reference for further adjustments and operations. When connecting the secondary circuit line from the fixture to the new junction box, gradually push the secondary circuit line out of the wire clamp with force, starting with the blocked end, and the exposed wire end is pushed into the wire entry hole at the corresponding position of the junction box. When it enters the wire entry hole of the junction box to an appropriate distance, tighten the junction box screws, the conductor end of the secondary circuit line is stably connected to the new junction box, and the fixture is removed;

[0038] The secondary current temporary short-circuit and measurement fixture mechanism is clamp-shaped, insulated, and is used to short-circuit the secondary circuit current of each phase on the incoming line side of the junction box. It is equipped with a current measuring clamp to measure the voltage and current of the current circuit. There is a probe in the clamp with a knob. When the knob is tightened, the probe penetrates the insulation of the secondary circuit wire and clamps the metal conductor. Each group consists of 2 such clamps and clamp connecting wires, and output cables. Each group short-circuits one phase of the secondary circuit current, totaling 3 groups, and is connected to the monitoring indicator. When in use, clamp the current of each phase, tighten the knob to penetrate the wire, and the detection indicator detects the current voltage and bridge line voltage and current at the position of the clamped secondary circuit to determine whether the temporary bypass circuit is reliably established or disconnected. A spare temporary bridge is also provided: the composition and function are the same as the secondary current temporary short-circuit and measurement fixture, and the operation is also the same. Since the temporary bypass may be unstable during operation, a set of spare bridges is set to improve reliability in consideration of the need for operational safety. This acts on the circuit as a safety backup, and the access point is separated from the main temporary bridge, and can be accessed at a location far away from the main temporary bridge, or other secondary circuit locations. When the circuit is abnormally disconnected during operation, the circuit can be connected urgently to avoid high voltage injury;

[0039] The working short-circuit bridge mechanism is used to short-circuit the secondary circuit current of each phase on the incoming side of the junction box for a long time, and establish a stable short-circuit bypass by short-circuiting the bare wire end. It consists of 2 bare wire end insulation clamps and cables, and a connected monitoring indicator. When in use, first use the secondary current to temporarily short-circuit and measure the clamp to establish a temporary short-circuit loop, then clamp the short-circuit bridge clamp into the corresponding current loop end, remove the secondary current loop line from the junction box, pull the loop line out of the junction box and then pull it into the short-circuit bridge clamp, automatically block it, and the metal electrode clamps the bare wire end of the loop. The short-circuit bridge is connected to the detector, and the short-circuit bridge end voltage and the current signal flowing through the short-circuit bridge are input into the monitor to determine whether the long-term short-circuit bypass of the short-circuit bridge is reliably established or disconnected.

[0040] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A bypass device for replacing a joint junction box without power outage, characterized in that: It includes a monitoring and indicating mechanism, a bare wire end insulation clamp mechanism, a secondary current temporary short-circuit and measurement clamp mechanism, and a working short-circuit bridge mechanism. The monitoring and indicating mechanism includes a data processing module, a data receiving module, and a data display module. The data processing module is respectively connected to the data receiving module and the data display module, and the data receiving module is respectively connected to the bare wire end insulation clamp mechanism, the secondary current temporary short-circuit and measurement clamp mechanism, and the working short-circuit bridge mechanism.

2. According to claim 1, a bypass device for replacing a combined junction box without power outage is characterized in that: The main body of the bare wire end insulation clamp mechanism is a cylindrical clamp and is provided with a cable connected to a monitoring indicating mechanism. The cylindrical clamp is used for measuring and short-circuiting loops.

3. The bypass device for replacing a combined junction box without power outage according to claim 1, characterized in that: The secondary current temporary short-circuiting and measuring fixture mechanism is specifically a clamp-shaped fixture structure, which is provided with an insulating layer and is used to short-circuit the secondary circuit current of each phase on the incoming line side of the junction box. The clamp-shaped fixture structure is also provided with a current measuring clamp for measuring the voltage and current of the current circuit.

4. The bypass device for replacing a combined junction box without power outage according to claim 1, characterized in that: The working short-circuit bridge mechanism includes two bare wire end insulation clamps and cables, which are used to short-circuit the secondary circuit current of each phase on the incoming line side of the junction box for a long time, and establish a stable short-circuit bypass by short-circuiting the bare wire ends.

5. A control method for a bypass device for replacing a combined junction box without power outage as claimed in claim 1, characterized in that: The following steps are involved: S1: The data receiving module of the monitoring indicator mechanism collects data information of the bare wire end insulation clamp mechanism, the secondary current temporary short-circuit and measurement clamp mechanism, and the working short-circuit bridge mechanism; S2: The data receiving module sends the collected data new message to the data processing module for data analysis and processing; S3: The data processing module sends the analysis and processing results to the data display module for data display.

6. A control method according to claim 5, characterized in that: In the step S1, data information of the bare wire end insulation clamp mechanism, the secondary current temporary short-circuit and measurement clamp mechanism, and the working short-circuit bridge mechanism are collected, specifically: Collect the measurement results sent by the bare wire end insulation clamp mechanism and the information on whether the circuit is short-circuited; Collect the voltage and current information of the current loop sent by the temporary short circuit of the secondary current and the measuring fixture mechanism; A control method for collecting the secondary circuit current information of each phase on the incoming line side of the junction box sent by a working shorting bridge control mechanism.

7. A control method according to claim 6, characterized in that: The step S2 is specifically as follows: analyzing the status of each process in establishing the loop bypass, providing a complete indication signal, recording the entire process as supporting evidence, implementing and checking the process, and stably establishing the bypass loop, monitoring vital signs, short-circuiting the grounding loop when necessary to maintain the loop current so as not to generate a current transformer short-circuit high voltage, and outputting a vital sign signal or an alarm signal.

8. A control method according to claim 7, characterized in that: The step S3 specifically includes: transmitting the indication signal, vital signs and alarm signal to the data display module for data display.

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