An electric energy metering device capable of replacing transformers under power

Abstract

The present invention discloses an electric energy metering device capable of replacing a transformer under power, which relates to the technical field of electric energy metering devices, comprising: a first conductive part comprising two terminals arranged in parallel, and an arc-shaped slideway is provided on the two conductively connected terminals; a second conductive part comprising an arc-shaped sliding sleeve located on the same circular path as the two arc-shaped slideways; the arc-shaped conductive rod has the following process during its rotation along the arc-shaped sliding sleeve: a transition position, wherein the conductive rod is conductively plugged into and matched with the two arc-shaped slideways at the same time; two stable positions, wherein the conductive rod is conductively plugged into and matched with one of the arc-shaped slideways, and a channel for loading and unloading the transformer is formed between the conductive rod and the other arc-shaped slideway; a triggering member, which is fixedly connected to the conductive rod, and when the transformer is inserted into the corresponding terminal from the channel, the triggering member is squeezed to make the conductive rod rotate from the current stable position to the transition position, and the conductive rod continues to rotate to the other stable position under the elastic force of the elastic member, so that the transformer can be replaced conveniently and quickly, and the operation is simple.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy metering devices, in particular to an electric energy metering device capable of live-replacement of a transformer. Background Art

[0002] An electric energy metering device is a device used to measure and record electric energy data such as power generation, power supply or power consumption. It mainly consists of an electric energy meter, a metering transformer and a secondary circuit. The transformer has a ring structure and is installed on the measured conductor.

[0003] Currently, mainstream current transformers typically have an integrated ring structure. When an old current transformer is damaged or reaches its end of life, the conductor under test must be disconnected from the terminal block, the old current transformer removed from the conductor under test, and a new current transformer installed. This causes a temporary power outage on the conductor under test, negatively impacting production and daily electricity consumption. Patent Publication No. CN110474251B discloses a combined metering device with a cart for live current transformer replacement and its application. This device enables live current transformer replacement, but the current transformer cart, anti-error locking device, and replacement process are all complex and inconvenient. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric energy metering device with live current transformer replacement, so as to solve the problem of inconvenience in live current transformer replacement in existing electric energy metering devices.

[0005] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: an electric energy metering device capable of replacing a transformer under power, comprising: a first conductive member, which includes two terminals arranged in parallel, and an arc-shaped slide is provided on the two conductively connected terminals; a second conductive member, which includes an arc-shaped sliding sleeve located on the same circular path as the two arc-shaped slides; an arc-shaped conductive rod, which has the following features during its rotation along the arc-shaped sliding sleeve: a transition position, in which the conductive rod is conductively plugged into and matched with the two arc-shaped slides at the same time; two stable positions, in which the conductive rod is conductively plugged into and matched with one of the arc-shaped slides, and a channel for loading and unloading the transformer is formed between the conductive rod and the other arc-shaped slide; a triggering member, which is fixedly connected to the conductive rod, and in the process of the transformer being inserted into the corresponding terminal from the channel, the triggering member is squeezed to rotate the conductive rod from the current stable position to the transition position, and the conductive rod continues to rotate to another stable position under the elastic force of the elastic member.

[0006] Furthermore, the elastic member includes a tension spring, one end of which is connected to the middle of the conductive rod, and the other end is fixedly connected to the arc-shaped sliding sleeve and is located on a ray extended from the axis of the conductive rod, and the ray passes through the midpoint of the line connecting the two terminals.

[0007] Furthermore, the trigger member has two inclined guide portions that are symmetrical about a straight line passing through the midpoint of the conductive rod and the axis.

[0008] Furthermore, the trigger member includes an intermediate body fixedly connected to the conductive rod, and two inclined guide parts are elastically rotatably connected to the upper side of the intermediate body through elastic units. The elastic forces of the two elastic units respectively make the corresponding inclined guide parts abut against the intermediate body and be symmetrical about a straight line passing through the midpoint of the conductive rod and the axis.

[0009] Furthermore, the elastic unit includes a torsion spring, which is sleeved on the rotating shaft between the corresponding inclined guide part and the intermediate body. One end of the torsion spring is fixedly connected to the corresponding inclined guide part, and the other end is fixedly connected to the intermediate body.

[0010] Furthermore, a first insulating rod is fixedly connected to the arc-shaped sliding sleeve, a second insulating rod is fixedly connected to the conductive rod, the first insulating rod and the second insulating rod are rotatably connected via a rotating shaft, and the rotating shaft is coaxial with the axis of the conductive rod.

[0011] Furthermore, the outer surfaces of the conductive rod, the arc-shaped sliding sleeve and the two terminals are all provided with an insulating layer, the conductive rod is provided with an exposed conductive groove along the circular path, and the inner walls of the arc-shaped sliding sleeve and the two arc-shaped slides are provided with exposed conductive edges along the circular path that are compatible with the conductive groove.

[0012] In the above technical solution, the present invention provides an electric energy metering device that can replace a transformer under power. The installation of the new transformer can be completed by simply inserting the new transformer into the corresponding terminal from the channel. During the installation of the new transformer, the triggering member is squeezed to enable the conductive rod to switch from the current steady-state position to another steady-state position, thereby realizing the connection of the primary winding of the new transformer and the disconnection of the primary winding of the old transformer. The old transformer can be taken out from the newly formed channel. The entire replacement process is convenient and fast, and the operation is simple. The measured conductor is powered on throughout the entire process and the current is monitored throughout the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0015] Figure 2 A schematic diagram of the structure provided by the embodiment of the present invention Figure I ;

[0016] Figure 3 A schematic diagram of the structure provided by the embodiment of the present invention Figure II ;

[0017] Figure 4 A schematic structural diagram of a trigger member provided in an embodiment of the present invention;

[0018] Figure 5 A schematic structural diagram of a conductive rod provided in an embodiment of the present invention when located in one of the stable working positions;

[0019] Figure 6 Schematic diagram of the structure of the conductive rod provided in the embodiment of the present invention when it is located at the transition position Figure I ;

[0020] Figure 7 Schematic diagram of the structure of the conductive rod provided in the embodiment of the present invention when it is located at the transition position Figure II ;

[0021] Figure 8 A schematic structural diagram of the conductive rod provided in an embodiment of the present invention when located at another stable working position.

[0022] Description of reference numerals:

[0023] 1. First conductive part; 1.1. First wire nose; 1.2. Terminal; 1.3. Arc-shaped slideway; 2. Second conductive part; 2.1. Second wire nose; 2.2. Arc-shaped sliding sleeve; 3. Conductive rod; 3.1. Conductive slot; 4. First insulating rod; 5. Second insulating rod; 6. Connecting rod; 7. Tension spring; 8. Trigger; 8.1. Inclined guide; 8.2. Intermediate body; 8.3. Torsion spring; 9. Channel; 10. Meter box; 11. Transformer. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] See also Figure 1-8An embodiment of the present invention provides an electric energy metering device capable of replacing a transformer 11 under power, comprising a meter box 10, an electric meter arranged in the meter box 10, a live replacement mechanism, and a transformer 11. The live replacement structure comprises a first conductive member 1, a second conductive member 2, a conductive rod 3, and a trigger member 8. The first conductive member 1 comprises a first wire nose 1.1 and two parallel terminals 1.2 fixedly connected to the first wire nose 1.1, and both terminals 1.2 are provided with an arc-shaped slide 1.3. The second conductive member 2 comprises a second wire nose 2.1 and an arc-shaped sleeve 2.2 fixedly connected to the second wire nose 2.1, and the arc-shaped sleeve 2.2 and the two arc-shaped slides 1.3 are located on the same circular path. The conductive rod 3 is in an arc-shaped structure, and the conductive rod 3 is rotatably arranged in the arc-shaped sleeve 2.2. The conductive rod 3 is located on the above-mentioned circular path.

[0026] In order to improve the stability of the movement of the conductive rod 3 relative to the arc-shaped sliding sleeve 2.2, a first insulating rod 4 is fixedly connected to the arc-shaped sliding sleeve 2.2, and a second insulating rod 5 is fixedly connected to the conductive rod 3. The first insulating rod 4 and the second insulating rod 5 are rotatably connected via a rotating shaft, and the rotating shaft is coaxial with the axis of the conductive rod 3. A limiting structure is provided between the first insulating rod 4 and the second insulating rod 5, which can limit the rotation stroke of the conductive rod 3 and prevent the conductive rod 3 from excessive rotation. For example, in this embodiment, the rotating shaft is fixedly connected to the first insulating rod 4 and rotatably connected to the second insulating rod 5. An arc-shaped groove coaxial with the rotating shaft is provided on the second insulating rod 5, and a limit block is fixedly connected to the rotating shaft. The limit block is located in the arc-shaped groove. When the limit block is located in the middle of the arc-shaped groove, the conductive rod 3 is in a transition position. When the limit blocks respectively abut against the two ends of the arc-shaped groove, the conductive rod 3 is respectively in two stable positions.

[0027] During the rotation of the conductive rod 3 along the arc-shaped sliding sleeve 2.2, there is a transition position and two stable positions. The two stable positions are distributed on both sides of the transition position and are symmetrical about the transition position. In the transition position, the conductive rod 3 and the two arc-shaped slides 1.3 are simultaneously electrically connected and plugged into each other. At this time, there are two parallel branches between the first wire nose 1.1 and the second wire nose 2.1: the first branch formed by the first wire nose 1.1-one of the terminals 1.2-conductive rod 3-second wire nose 2.1, and the second branch formed by the first wire nose 1.1-the other terminal 1.2-conductive rod 3-second wire nose 2.1. If the old transformer 11 expires and is scrapped, the new and old transformers 11 will operate simultaneously, and the current of the measured conductor is the sum of the currents measured by the new and old transformers 11. In any stable position, the conductive rod 3 is electrically plugged into one of the curved slideways 1.3, forming a single path between the first and second lugs 1.1 and 2.1. A channel 9 is formed between the end of the conductive rod 3 and the other curved slideway 1.3, through which the mutual inductor 11 is installed and removed. A trigger member 8 is fixedly connected to the conductive rod 3, specifically to the first insulating rod 4. As the mutual inductor 11 slides from the channel 9 into the corresponding terminal 1.2, it compresses the trigger member 8, causing the conductive rod 3 to rotate from the current stable position to the transition position. The conductive rod 3 then immediately continues to rotate to the next stable position under the elastic force of the elastic member.

[0028] As a preferred technical solution, the elastic member includes a tension spring 7, one end of which is connected to the middle portion of the conductive rod 3, specifically hooked on a first protrusion on the first insulating rod 4 located in the middle portion of the conductive rod 3. The other end of the tension spring 7 is fixedly connected to the arc-shaped sliding sleeve 2.2 and located on a ray extending from the axis of the conductive rod 3, which passes through the midpoint of the line connecting the two terminals 1.2. Specifically, a second protrusion is fixedly connected to the first insulating rod 4 via a connecting rod 6, and the end of the tension spring 7 is hooked on the second protrusion. In this way, when the conductive rod 3 is in the transition position, the extension of the tension spring 7 reaches its maximum. At this time, regardless of whether the conductive rod 3 rotates clockwise or counterclockwise, the tension spring 7 releases its elastic potential energy. In other words, the tension spring 7 has a tendency to rotate the conductive rod 3 to any stable position. When the conductive rod 3 rotates to one of the stable positions, the extension of the tension spring 7 reaches its minimum. At this time, the tension spring 7 is still in a stretched and deformed state and still has elastic force, thereby maintaining the conductive rod 3 in the current stable position.

[0029] When replacing a transformer 11 according to the present invention, the new transformer 11 is inserted through the channel 9 onto the corresponding terminal 1.2, squeezing the adjacent inclined guide 8.1 to rotate the first insulating rod 4 and the conductive rod 3. As the conductive rod rotates from its current steady-state position to the transition position, the elastic member continues to accumulate energy. When the conductive rod 3 reaches the transition position, the housing of the new transformer 11 remains in sliding contact with the adjacent inclined guide 8.1. As the new transformer 11 continues to be inserted onto the corresponding terminal 1.2, it continues to squeeze the inclined guide 8.1 until the conductive rod 3 passes the transition position. At this point, the accumulated elastic force of the elastic member is immediately released, causing the conductive rod 3 to rotate to the steady-state position corresponding to the new transformer 11. A channel 9 is formed between the terminal 1.2 corresponding to the old transformer 11 and the conductive rod 3 for removing the old transformer 11. The entire replacement process is convenient, fast, and simple to operate. The tested conductor remains powered and its current is monitored throughout the entire process.

[0030] In one embodiment of the present invention, the trigger member 8 has an integrated structure with two inclined guide portions 8.1. The two inclined guide portions 8.1 are symmetrical about a line passing through the midpoint of the conductive rod 3 and the axis. In this embodiment, when the conductive rod 3 rotates to the vicinity of the transition position, the old mutual inductor 11 needs to be moved from the corresponding terminal 1.2 to the conductive rod 3, such as Figure 7 , and then the conductive rod 3 continues to rotate to complete the position switching. At this time, the old mutual inductor 11 is located at the newly formed channel 9, and the old mutual inductor 11 can be taken out.

[0031] In another embodiment provided by the present invention, refer to Figure 4 The trigger member 8 includes an intermediate body 8.2 fixedly connected to the conductive rod 3. Specifically, the intermediate body 8.2 is fixedly connected to the first insulating rod 4. The intermediate body 8.2 is rotatably connected to two inclined guides 8.1. Elastic units are respectively disposed between the two inclined guides 8.1 and the intermediate body 8.2. The elastic force of the two elastic units causes the corresponding inclined guides 8.1 to abut against the intermediate body 8.2 and be symmetrical about a line passing through the midpoint of the conductive rod 3 and the axis. Specifically, the elastic unit includes a torsion spring 8.3, which is mounted on the rotating shaft between the corresponding inclined guide 8.1 and the intermediate body 8.2. One end of the torsion spring 8.3 is fixedly connected to the corresponding inclined guide 8.1, and the other end is fixedly connected to the intermediate body 8.2.

[0032] In this embodiment, Figure 5When the new mutual inductor 11 is inserted into the corresponding terminal 1.2 from the channel 9, it squeezes the adjacent inclined guide part 8.1. The inclined guide part 8.1 abuts against the intermediate body 8.2 to rotate the first insulating rod 4 and the conductive rod 3. The elastic member gradually accumulates energy. When the conductive rod 3 rotates to the vicinity of the transition position, there is no need to immediately remove the old mutual inductor 11 from the corresponding terminal 1.2. Instead, continue to insert the new mutual inductor 11 into the corresponding terminal 1.2. When the conductive rod 3 reaches the transition position, Figure 6 , the housing of the new transformer 11 is still in a state of sliding contact with the adjacent inclined guide part 8.1. As the new transformer 11 continues to be installed on the corresponding terminal 1.2, the new transformer 11 will continue to squeeze the inclined guide part 8.1 until the conductive rod 3 passes the transition position. At this time, the elastic force accumulated in the elastic member is immediately released, causing the conductive rod 3 to rotate to the stable position corresponding to the new transformer 11. A channel 9 is formed between the terminal 1.2 corresponding to the old transformer 11 and the conductive rod 3. Figure 8 Then, the new transformer 11 is released, and the old transformer 11 is moved from the corresponding terminal 1.2 to the channel 9 for removal. Thus, in this embodiment, the live replacement of the new and old transformers 11 can be completed by simply operating the new transformer 11 and the old transformer 11 in sequence, without having to operate both simultaneously. In other words, the operator can operate the transformer 11 with one hand using an insulating tool, without having to use two hands or multiple people to operate.

[0033] When the outer surfaces of the conductive rod 3 and the arc-shaped sliding sleeve 2.2 are both exposed and conductive, an insulating box with a cover should be provided outside the live replacement mechanism. The cover of the insulating box is only allowed to be opened when replacing the mutual inductor 11.

[0034] Preferably, the outer surfaces of the conductive rod 3, the curved sleeve 2.2, and the two terminals 1.2 are all provided with an insulating layer. An exposed conductive groove 3.1 is formed on the conductive rod 3 along the aforementioned circular path. The inner walls of the curved sleeve 2.2 and the two curved guideways 1.3 are also provided with exposed conductive ridges along the circular path, matching the conductive grooves 3.1. This prevents the conductive ridges from being exposed, and the conductive areas of the conductive grooves 3.1 are also concave, thereby improving safety. In this case, the insulating housing outside the live-swap mechanism can be omitted.

[0035] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. An electric energy metering device capable of hot-swap transformer replacement, characterized in that: include: The first conductive member includes two terminals arranged in parallel, and the two conductively connected terminals are both provided with an arc-shaped slideway; a second conductive member comprising an arc-shaped sliding sleeve located on the same circular path as the two arc-shaped slideways; The arc-shaped conductive rod has the following characteristics during its rotation along the arc-shaped sliding sleeve: At the transition station, the conductive rod and the two arc-shaped slides are simultaneously electrically connected and plugged in; Two stable working positions, the conductive rod is conductively plugged into one of the arc-shaped slideways, and forms a channel for loading and unloading the mutual inductor with the other arc-shaped slideway; a triggering member fixedly connected to the conductive rod, and when the mutual inductor is inserted into the corresponding terminal from the channel, the triggering member is squeezed to rotate the conductive rod from the current stable position to the transition position, and the conductive rod continues to rotate to another stable position under the elastic force of the elastic member; The elastic member includes a tension spring, one end of which is connected to the middle of the conductive rod, and the other end of which is fixedly connected to the arc-shaped sliding sleeve and located on a ray extending from the axis of the conductive rod, the ray passing through the midpoint of the line connecting the two terminals; The trigger member includes an intermediate body fixedly connected to the conductive rod, and two inclined guide parts are elastically rotatably connected to the intermediate body via elastic units. The elastic force of the two elastic units causes the corresponding inclined guide parts to abut against the intermediate body and be symmetrical about a line passing through the midpoint of the conductive rod and the axis. The installation of the new transformer can be completed by simply inserting the new transformer into the corresponding terminal from the channel. During the installation of the new transformer, the trigger piece is squeezed to enable the conductive rod to switch from the current steady-state position to another steady-state position, thereby connecting the primary winding of the new transformer and disconnecting the primary winding of the old transformer. The old transformer can then be taken out from the newly formed channel.

2. The electric energy metering device capable of hot-swap transformer replacement according to claim 1, characterized in that: The triggering member has two inclined guide parts that are symmetrical about a straight line passing through the midpoint of the conductive rod and the axis.

3. The electric energy metering device capable of hot-swap transformer replacement according to claim 1, characterized in that: The elastic unit includes a torsion spring, which is sleeved on the rotating shaft between the corresponding inclined guide part and the intermediate body. One end of the torsion spring is fixedly connected to the corresponding inclined guide part, and the other end is fixedly connected to the intermediate body.

4. The electric energy metering device capable of hot-swap transformer replacement according to claim 1, characterized in that: The arc-shaped sliding sleeve is fixedly connected to a first insulating rod, the conductive rod is fixedly connected to a second insulating rod, the first insulating rod and the second insulating rod are rotatably connected via a rotating shaft, and the rotating shaft is coaxial with the axis of the conductive rod.

5. The electric energy metering device capable of live-replacement of a transformer according to claim 1, characterized in that: The outer surfaces of the conductive rod, the arc-shaped sliding sleeve and the two terminals are all provided with an insulating layer. The conductive rod is provided with an exposed conductive groove along the circular path. The arc-shaped sliding sleeve and the inner walls of the two arc-shaped slides are provided with exposed conductive edges along the circular path that are compatible with the conductive groove.

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