CN113721183B - Modular functional plug suitable for plug-in test junction box and how to use it - Google Patents

Abstract

A modular functional plug suitable for plug-in test junction boxes relates to the field of on-site operation and maintenance of electric energy metering devices using plug-in test junction boxes. The invention includes a wiring module, a closed module, a current module, a voltage module, a partition module and a medium The relay module, the current module, the voltage module and the partition module are connected through the plug and plug-in test junction box set on it. The current module, voltage module, partition module and relay module are equipped with plugs and sockets, and the wiring module is equipped with sockets. , a plug is provided on the closed module. The current module, voltage module, partition module and relay module can be selected according to actual needs, or at least one can be selected and arranged in order according to actual needs and then connected into one through plugs and sockets. The present invention adopts a separate design. Select the order of modules according to needs to meet the needs of different measurement scenarios, reduce plug maintenance costs, reduce the weight of equipment carried by staff, and improve plug scalability and replaceability.

Description

Modular functional plug suitable for plug-in test junction box and how to use it

Technical field

The invention relates to the technical field of on-site operation and maintenance of electric energy metering devices using plug-in test junction boxes, and specifically relates to a modular functional plug suitable for plug-in test junction boxes.

Background technique

Electric energy metering devices, especially those connected through transformers, are the direct basis for large and medium-sized power customers to conduct electric energy transactions. Their operating performance will contribute to customer production and operation, power grid investment and construction, orderly social energy use, and market fairness and justice. It has an impact on many aspects, so necessary on-site inspection and testing must be carried out to confirm its key performance, and expired metering devices must be rotated according to certain rules.

In order to avoid the impact of on-site testing and rotation work on customers' continuous and reliable power consumption, on-site inspections, voltage drop tests, energy meter rotation and other work are currently implemented in non-power outage methods. To achieve this requirement, the currently commonly used method is to install Test junction boxes include two types: crimping type and plug-in type. The crimping type is a traditional structure with complex operation and higher risks. The plug-in type has greater advantages in safety and convenience, and has gradually become widely recognized. However, the existing plug-in test junction box requires independent use of three functional plugs when performing on-site operation and maintenance work, thus causing the following problems or deficiencies:

①The existing on-site inspection plugs, meter replacement plugs, and voltage drop test plugs are relatively similar in appearance. On-site workers are easily confused, and may not work due to incorrect plugs. Carrying them all will greatly increase on-site operation and maintenance. equipment burden;

② Due to the characteristics of the structural design of the functional plug, the connecting piece lacks protection. There is an inevitable risk of bending or breaking due to external forces during transportation, loading and unloading. However, the existing functional plug adopts an integral design. Once it is If one connecting piece is damaged, the entire plug needs to be replaced, which increases the difficulty and cost of equipment maintenance;

③At present, electric energy metering devices are increasingly assuming non-metering functions, so their work requirements and on-site operation and maintenance work also tend to be diversified and expanded. Traditional integrated functional plugs use built-in curing circuits, which are difficult to adapt to new tests. The needs of projects and new operation and maintenance work have relatively low scalability and freedom, making it difficult to adapt to the new situation of electric energy metering and operation and maintenance.

To sum up, the integrated functional plug currently used in combination with the plug-in test junction box has certain deficiencies in terms of ease of use, convenience of maintenance, functional diversity, and scalability. In order to solve the above technical problems, this paper The invention provides a modular functional plug suitable for plug-in test junction boxes.

Contents of the invention

The purpose of the present invention is to: in order to solve the technical problems raised in the background art, the present invention provides a modular functional plug suitable for a plug-in test junction box.

In order to achieve the above object, the present invention specifically adopts the following technical solutions:

The modular functional plug suitable for plug-in test junction boxes includes a wiring module, a closed module, a current module, a voltage module, a partition module and a relay module. The current module, voltage module and partition module are respectively provided with and plug-in plugs. The plug-in test junction box is equipped with a current module connection plug, a voltage module connection plug and a partition module connection plug. The current module, voltage module, partition module and relay module are all equipped with plugs for detachable connection with other modules. Socket, the wiring module is provided with a socket for detachable connection with other modules, the closed module is provided with a plug for detachable connection with other modules, the current module, voltage module, isolation module and relay module You can select none or select at least one according to actual needs and arrange them in order according to actual needs and then connect them into one through plugs and sockets.

Further, the wiring module includes a hollow support shell made of flame-retardant insulating material. A socket is provided on the right side of the wiring module. A layered wiring strip is provided in the wiring module shell. The layered wiring One end of the row is connected to the socket, and the other end of the layered wiring row is fixedly connected with a connecting wire, and the connecting wire passes through the shell of the wiring module and extends out.

Further, the current module, voltage module, relay module and partition module all include a hollow support shell. The left and right sides of the support shell are respectively provided with plugs and sockets. The support shell is provided with layered Wiring strip, the left and right ends of the hierarchical wiring strip are connected to plugs and sockets respectively, and the current module connecting plug, voltage module connecting plug and partition module connecting plug are all fixed on the outer surface of each corresponding module support shell and are not Coplanar with the outer surface provided with a plug or socket, the current module connection plug includes an upper metal sheet and a lower metal sheet, and also includes a middle insulating layer for connecting the upper metal sheet and the lower metal sheet. The voltage module connection plug The whole part is made of conductive material, and the whole part of the partition module connection plug is made of insulating material.

Further, the socket includes an upper spring piece and a lower spring piece.

Further, the plug includes a voltage plug and a current plug, the current plug includes an upper metal sheet of the current plug and a lower metal sheet of the current plug, and also includes a current plug for connecting the upper metal sheet of the current plug and the lower metal sheet of the current plug. Insulation.

Further, the hierarchical wiring strip includes a voltage wiring strip and a current wiring strip.

Further, the current connection bar includes an upper metal sheet and a lower metal sheet, and an insulating layer disposed between the upper metal sheet and the lower metal sheet of the current connection bar.

Further, the closed module includes a hollow support shell, a plug is provided on the left side of the support shell, and the plug is made of insulating material.

Further, the functional plug is used for on-site inspection of electric energy meters, in the order of wiring module, current module, voltage module, relay module, current module, voltage module, relay module, current module, voltage module, relay module and closed module. Connected by plugs and sockets.

Further, the functional plug is used for secondary voltage drop test, according to wiring module, relay module, voltage module, relay module, relay module, voltage module, relay module, relay module, voltage module, relay module and The sequence of closed modules is connected via plugs and sockets.

Furthermore, the functional plug is used to change the meter without power interruption. The plug and The sockets are connected.

Further, the wiring modules, current modules, voltage modules, relay modules, partition modules and closing modules are provided with different colors and logos.

Working principle and beneficial effects of the present invention:

(1) The present invention innovatively designs six types of module plugs: wiring module, current module, voltage module, relay module, partition module and closed module through module design, hierarchical layout, functional refinement, etc., and rationally formulates the module plugs. Function implementation solutions between modules, between modules and on-site operation and maintenance equipment, and between modules and plug-in test wiring. By reasonably configuring and connecting functional modules, we can quickly and accurately target the plug-in test junction box. Perform signal export or blocking operations on each wiring, and customize functional plugs suitable for on-site inspection of electric energy meters, secondary voltage drop tests, replacement of electric energy meters without power outage, and other operation and maintenance scenarios that may occur in the future according to on-site operation and maintenance needs. , the shells of wiring modules, closed modules and other modules can play a good role in isolation and insulation, and are marked through colors, characters, etc. Among them, colors are used to mark different information, characters are used to mark module types, and on-site operation Maintenance personnel only need to assemble it according to the configuration plan according to the test project requirements and then it can be used quickly. It has the technical advantages of safety, convenience, flexibility, universality and scalability.

(2) The traditional solution usually uses a set of three plugs. In order to avoid operation and maintenance difficulties caused by mistaking the plugs, the method of carrying them all is often adopted. The three sets of plugs include connecting wires and corresponding entire plug-in test wiring. The plug part and internal wiring of the box. Compared with the traditional solution, the solution of this patent can compress the volume of the required portable equipment to about half of the existing solution without reducing the on-site operation and maintenance capabilities. The invention has the weight The advantages of being lighter and easier to carry.

(3) Compared with the existing solution, that is, the integrated functional plug, the design solution of the present invention is simpler to store and has a longer service life. The functional plug of the present invention is assembled at the operation and maintenance site and can be stored scattered at ordinary times. This greatly reduces the space required for storage and carrying, and also reduces the risk of damage such as breakage and bending of the connecting plug due to bumps, pulls and other factors during transportation and access. In addition, even if some parts are found at the operation and maintenance site If a functional module is damaged, it can be easily replaced with functional modules of the same type or spare parts.

(4) Compared with the existing solution, that is, the integrated functional plug, the design solution of the present invention is more scalable and more flexible in operation. The functional plug of the present invention adopts a structural module design, and can be customized according to needs through a few simple operations. Freely assemble functional plugs that have intrinsic safety capabilities and can realize the access and removal of operation and maintenance equipment in one unplugging operation. Compared with the existing solution, which is oriented to a small number of operation and maintenance scenarios and solidifies the internal wiring method, although it will increase the number of on-site operation, but can greatly increase the flexibility of operation and maintenance work. The granularity of operation and maintenance work is greatly refined from dividing by work type to phase-separated and signal-separated operations. By applying the design scheme of the present invention, on-site operation and maintenance personnel On the basis of ensuring that the voltage is not short-circuited and the current is not open-circuited, you can completely decide to export, block or not operate any wiring in the plug-in test junction box, which has obvious implications for new on-site operation and maintenance work or complex operation and maintenance requirements. Technical advantages and adaptability.

Description of the drawings

Figure 1 is a schematic structural diagram of one of the functional plugs obtained by the combination of the present invention;

Figure 2 is a left side view of the wiring module of the present invention;

Figure 3 is a right side view of the wiring module of the present invention;

Figure 4 is an enlarged view of part A of Figure 3 of the present invention;

Figure 5 is a cross-sectional view of the wiring module of the present invention;

Figure 6 is a right side view of the current module of the present invention;

Figure 7 is an enlarged view of part B of Figure 6;

Figure 8 is a left side view of the current module of the present invention;

Figure 9 is a cross-sectional view of the current module of the present invention;

Figure 10 is an enlarged view of part C of Figure 9;

Figure 11 is a left side view of the voltage isolation module of the present invention;

Figure 12 is a right side view of the voltage isolation module of the present invention;

Figure 13 is a left side view of the relay module of the present invention;

Figure 14 is a right side view of the relay module of the present invention;

Figure 15 is a cross-sectional view of the relay module of the present invention;

Figure 16 is a left side view of the closed module of the present invention;

Figure 17 is a right side view of the closed module of the present invention;

Figure 18 is a left side view of the partition module of the present invention;

Figure 19 is a right side view of the partition module of the invention;

Reference signs:

1-Wiring module, 1.1-Connecting line, 2-Current module, 2.1-Current module connection plug, 3-Voltage module, 3.1-Voltage module connection plug, 4-Relay module, 5-Closed module, 6-Layered wiring row, 6.1-voltage terminal block, 6.2-current terminal block, 6.2.1-metal sheet on the current terminal block, 6.2.2-insulation layer in the current terminal block, 6.2.3-metal sheet under the current terminal block, 7-voltage Plug, 8-current plug, 8.1-metal sheet on the current plug, 8.2-insulation layer in the current plug, 8.3-metal sheet under the current plug, 9-socket, 9.1-socket upper spring piece, 9.2-socket lower spring piece, 10-partition Module, 10.1-partition module connection plug, 11-support shell.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters represent similar items in the following figures, therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures. In addition, the terms "first", "second", etc. are only used to differentiate descriptions and are not to be understood as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the drawings, or the product of the invention Orientations or positional relationships that are customarily placed during use are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood. are limitations of the present invention.

Example 1

As shown in Figure 1-19, the modular functional plug suitable for plug-in test junction boxes includes wiring modules, closed modules, current modules, voltage modules, isolation modules and relay modules. The current modules, voltage modules and The partition module is respectively provided with a current module connection plug, a voltage module connection plug and a partition module connection plug that cooperate with the plug-in test junction box. The current module, voltage module, partition module and relay module are all equipped with Plugs and sockets for detachable connection to other modules, the wiring module is provided with sockets for detachable connection to other modules, the closed module is provided with plugs for detachable connection to other modules, the current module, voltage module Modules, partition modules and relay modules can be selected according to actual needs, or at least one can be selected and arranged in order according to actual needs and then connected into one through plugs and sockets.

Preferably, the wiring module includes a hollow supporting shell made of flame-retardant insulating material. A socket is provided on the right side of the wiring module. A layered wiring strip is provided in the housing of the wiring module. The layered wiring One end of the row is connected to the socket, and the other end of the layered wiring row is fixedly connected with a connecting wire, and the connecting wire passes through the shell of the wiring module and extends out.

Preferably, the current module, voltage module, relay module and partition module all include a hollow support shell, with plugs and sockets respectively provided on the left and right sides of the support shell, and layered inside the support shell. Wiring strip, the left and right ends of the hierarchical wiring strip are connected to plugs and sockets respectively, and the current module connecting plug, voltage module connecting plug and partition module connecting plug are all fixed on the outer surface of each corresponding module support shell and are not Coplanar with the outer surface provided with a plug or socket, the current module connection plug includes an upper metal sheet and a lower metal sheet, and also includes a middle insulating layer for connecting the upper metal sheet and the lower metal sheet. The voltage module connection plug The whole part is made of conductive material, and the whole part of the partition module connection plug is made of insulating material.

Preferably, the socket includes an upper elastic piece and a lower elastic piece.

Preferably, the plug includes a voltage plug and a current plug, the current plug includes an upper metal sheet of the current plug and a lower metal sheet of the current plug, and further includes a current plug for connecting the upper metal sheet of the current plug and the lower metal sheet of the current plug. Insulation.

Preferably, the layered wiring strip includes a voltage wiring strip and a current wiring strip.

Preferably, the current connection bar includes an upper metal sheet and a lower metal sheet, and an insulating layer disposed between the upper metal sheet and the lower metal sheet of the current connection bar.

Preferably, the closed module includes a hollow support shell, a plug is provided on the left side of the support shell, and the plug is made of insulating material.

The current module has the function of exporting current signals. Specifically, the current module connecting plug of the current module is inserted into the corresponding position of the plug-in test junction box. The current signal to be exported flows into the lower end of the plug-in test junction box through the current module connecting plug. The lower metal sheet enters the current module and is connected to the lower metal sheet of the current wiring strip in the layered wiring strip in the current module. The lower metal sheet of the current wiring strip is further connected to the lower metal sheet of the current plug of the current plug on the left side of the current module. The other modules on the left are finally connected through the connecting cable of the wiring module, and then enter the operation and maintenance equipment. The current flowing out of the operation and maintenance equipment passes through the other modules on the left through the connecting cable, flows into the metal piece on the current plug of the current module plug, and passes through the current wiring strip. The metal sheet is connected to the upper metal sheet of the current module connection plug, and finally flows into the upper end of the plug-in test junction box, so that the current loop can be changed conveniently and quickly, and the series connection of the operation and maintenance equipment can be completed, thereby realizing the current signal. Export function.

The voltage module has a voltage signal export function, which is as follows: the voltage module connection plug of the voltage module is inserted into the corresponding position of the plug-in test junction box. The voltage signal to be exported enters from the lower end of the plug-in test junction box and is connected to the voltage module via the voltage module connection plug. The upper end of the plug-in test junction box is connected, the rear end of the voltage module connection plug is connected to the voltage wiring strip of the layered wiring strip, and then connected to the left module through the voltage plug, and finally connected to the connection line through the wiring module to enter the operation and maintenance equipment , thereby completing the parallel connection of operation and maintenance equipment and realizing the export function of voltage signals.

The partition module has the voltage signal isolation function, which is as follows: the partition module connecting plug of the partition module is inserted into the corresponding position of the plug-in test junction box. Since the partition module connection plug is made of insulating materials, this operation can realize the plug-in test junction box. The upper and lower end voltage signals are blocked to realize the function of disconnecting the voltage signal from the energy meter.

Preferably, the functional plug is used for on-site inspection of electric energy meters in the order of wiring module, current module, voltage module, relay module, current module, voltage module, relay module, current module, voltage module, relay module and closed module. It is connected through plugs and sockets. The on-site inspection of the electric energy meter needs to export voltage and current signals at the same time, and the current signal needs to be exported from the front of the electric energy meter. Therefore, for each phase, it is necessary to follow the order of current module, voltage module and relay module. Connect the functional modules and use the wiring module on the far left and the closed module on the right. Specifically, the current module is responsible for deriving the current signal from the current loop in front of the meter, the voltage module is responsible for deriving the voltage signal, and the relay module is responsible for connecting the right The electrical signal sent from the functional module to the module socket is connected to the hierarchical wiring strip, and is transmitted to the left module via the module plug, thus achieving the role of signal relay and structural stability. The wiring module is responsible for connecting the electrical signals in the hierarchical wiring strip. The closed module is responsible for realizing the overall external insulation of the functional plug and maintaining the structural integrity of the functional plug.

Preferably, the functional plug is used for the secondary voltage drop test, according to wiring module, relay module, voltage module, relay module, relay module, voltage module, relay module, relay module, voltage module, relay module and The sequence of closed modules is connected through plugs and sockets. The secondary voltage drop test only needs to derive the voltage signals of each phase. Therefore, for each phase, the relay module, voltage module, and relay module can be used to connect the functional modules in sequence, and The wiring module is used on the far left, and the closed module is used on the right. Specifically, the voltage module is responsible for exporting the voltage signal, and the relay module is responsible for connecting the electrical signal sent from the right functional module to the module socket to the hierarchical wiring strip, and via The module plug is passed to the left module to achieve signal relay and structural stabilization. The wiring module is responsible for connecting the electrical signals in the layered wiring strip to the connecting line. The closed module is responsible for achieving the overall external insulation of the functional plug and maintaining the functional plug. Structurally complete.

Preferably, the functional plug is used for non-stop power meter replacement, and the plug and It is connected with sockets. There is no need to export voltage and current signals when changing the meter without power outage. However, it is necessary to short-circuit the current loop in front of the meter and the current loop behind the meter at the plug-in test junction box, and disconnect the voltage line in front of the meter, so as to achieve complete The goal is to block voltage and current signals from entering the energy meter. Therefore, for each phase, the functional modules can be connected in the order of current module, blocking module, and current module, and a wiring module or a closed module with a module socket can be used on the far left , a closed module is used on the far right. Specifically, the two current modules of each phase connect the current loop in front of the meter and the current loop behind the meter to the same current wiring strip, thereby completing the short circuit in front of the meter for the current signal of the phase. Each phase The phase blocking module completes the isolation of the phase voltage signal, thereby completing the separation of the phase electrical signal from the electric energy meter. The wiring module on the left or the closed module with a module socket and the closed module on the right are responsible for realizing the overall external function of the plug. Insulate and maintain functional plug structural integrity.

Preferably, the wiring module, current module, voltage module, relay module, partition module and closing module are provided with different colors and logos.

It is known from common technical knowledge that the present invention can be implemented by other embodiments without departing from its spirit or essential characteristics. Therefore, the above-disclosed embodiments are in all respects illustrative and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims (7)

1. A modular functional plug suitable for plug-in test junction boxes, characterized in that it includes a wiring module, a closed module, a current module, a voltage module, a partition module and a relay module. The current module, voltage module and partition module There are current module connection plugs, voltage module connection plugs and isolation module connection plugs that match the plug-in test junction box. The current module, voltage module, isolation module and relay module are all equipped with other modules. Detachably connected plugs and sockets, the wiring module is provided with sockets for detachable connection with other modules, the closed module is provided with plugs for detachable connection with other modules, the current module, voltage module, The partition module and relay module can be selected according to actual needs, or at least one can be selected and arranged in order according to actual needs and then connected as a whole through plugs and sockets; The current module, voltage module, relay module and partition module all include a hollow support shell. The left and right sides of the support shell are respectively provided with plugs and sockets. The support shell is provided with layered wiring strips. The left and right ends of the layered wiring strip are connected to plugs and sockets respectively. The current module connection plug, voltage module connection plug and partition module connection plug are all fixed on the outer surface of each corresponding module support shell and are not connected with the The outer surfaces of the plug or socket are coplanar. The current module connection plug includes an upper metal sheet and a lower metal sheet, and also includes a middle insulation layer for connecting the upper metal sheet and the lower metal sheet. The voltage module connection plug is a conductor as a whole. Material, the entire partition module connection plug is made of insulating material; The plug includes a voltage plug and a current plug, the current plug includes an upper metal sheet of the current plug and a lower metal sheet of the current plug, and also includes an insulating layer in the current plug for connecting the upper metal sheet of the current plug and the lower metal sheet of the current plug; The layered terminal block includes a voltage terminal block and a current terminal block. The current terminal block includes an upper metal sheet and a lower metal sheet. It also includes a metal sheet arranged on the upper current terminal block and under the current terminal block. Insulating layer in current wiring strip between metal sheets. 2. The modular functional plug suitable for plug-in test junction boxes according to claim 1, characterized in that the wiring module includes a hollow support shell made of flame-retardant insulating material, and the wiring module There is a socket on the right side, and a layered wiring strip is provided in the wiring module shell. One end of the layered wiring strip is connected to the socket, and the other end of the layered wiring strip is fixedly connected with a connecting wire. The connecting wire Pass through the housing of the wiring module and extend out. 3. The modular functional plug suitable for plug-in test junction box according to any one of claims 1-2, characterized in that the socket includes an upper spring piece and a lower spring piece. 4. The modular functional plug suitable for plug-in test junction boxes according to claim 1, characterized in that the closed module includes a hollow support shell, and the use method of the plug is provided on the left side of the support shell. , the plug is made of insulating material. 5. The functional plug according to any one of claims 1, 2, and 4, characterized in that the functional plug is used for on-site inspection of electric energy meters, according to wiring module, current module, voltage module, relay module, current module, The sequence of voltage modules, relay modules, current modules, voltage modules, relay modules and closed modules are connected via plugs and sockets. 6. The method of using the functional plug according to any one of claims 1, 2, and 4, characterized in that the functional plug is used for secondary voltage drop testing, according to wiring module, relay module, voltage module, relay The sequence of modules, relay modules, voltage modules, relay modules, relay modules, voltage modules, relay modules and closed modules are connected via plugs and sockets. 7. The method of using the functional plug according to any one of claims 1, 2, and 4, characterized in that the functional plug is used for changing meters without power interruption, and is divided into wiring module, current module, isolation module, current module, and current module. The sequence of modules, partition module, current module, current module, partition module, current module and closing module is connected by plugs and sockets.