A handcart-type high-voltage electric energy meter capable of being replaced with electricity and its application

Abstract

The invention discloses a trolley-type high-voltage electric energy meter that can be replaced with power and an application thereof, comprising a trolley-type single-phase high-voltage electric energy meter, wherein the trolley-type single-phase high-voltage electric energy meter comprises a trolley box, a power fixed contact, a load fixed contact and a voltage fixed contact connected to a high-voltage power grid are arranged on one wall of the trolley box, a trolley frame is arranged in the trolley box, a detachable single-phase high-voltage metering part is arranged in the trolley frame, a power terminal, a load terminal and a voltage terminal in the single-phase high-voltage metering part are respectively connected to the power fixed contact, the load fixed contact and the voltage fixed contact in a plug-in manner through the power moving contact, the load moving contact and the voltage moving contact, so that the high-voltage electric energy meter can be replaced without power outage, and uninterrupted metering replacement and error-prevention replacement under load can be further realized.

Description

[Technical field]

[0001] The invention relates to measuring instruments and meters, and in particular to a trolley-type high-voltage electric energy meter that can be replaced with electricity and application thereof. [Background Technology]

[0002] High-voltage electric energy meter is a new type of instrument that is directly connected to 6kV~35kV power lines to measure active and reactive electric energy. It consists of a high-voltage current and voltage sensor, a high-voltage power supply unit, an electric energy metering unit, a built-in meter display unit, a communication unit, etc., which are enclosed in the same shell. Since the voltage is much higher than the ordinary 220V mains, the safety distance is much larger, and the harm of electric shock to the human body is more serious. Therefore, the insulation level of the equipment is also much higher, and the safety distance between the human body and the live equipment is also much larger, such as the national electrical safety work regulations. It is stipulated that for 10kV equipment, the safe distance between the on-duty personnel and the non-stop power equipment is 0.7m. Therefore, the traditional high-voltage metering device uses high-voltage voltage transformer and high-voltage current transformer to convert the high voltage of the high-voltage power grid into low voltage. For example, the voltage is reduced to 100V, and one end must be grounded. The high-voltage electric energy meter is connected through the secondary circuit and the test junction box. The voltage and current connected to the electric energy meter are rated for ground and do not exceed 100V. When calibrating and replacing the electric energy meter connected to the secondary circuit in accordance with regulations, there is no need to shut down the high-voltage equipment, which can ensure the safety of personnel and equipment.

[0003] The high-voltage energy meter is directly connected to the 6kV~35kV power line (hereinafter referred to as the high-voltage power grid). The high-voltage sensor, current sensor, energy metering module and communication module are integrated and packaged in an insulating jacket to form a high-voltage metering unit, and then installed on the bench and other installation points through insulating supports. Therefore, the external structure is much simpler than that of traditional high-voltage metering devices. It has the advantages of high accuracy, small size, light weight, low power consumption, and anti-theft of electricity. It is the future development direction of high-voltage energy metering. However, ordinary high-voltage energy meters cannot be installed and disassembled under power when connected to the high-voltage power grid. In order to ensure personal safety, according to regulations, there are strict requirements and complex operating steps for replacement and calibration, which require power outage, power testing, and grounding, which affects its promotion and application.

[0004] To solve this problem, Chinese invention patents such as "A high-voltage electric energy meter with a metering unit that can be replaced with power on, application number CN201410286179.1" and "A configurable new high-voltage electric energy meter, application number CN201710353079.X" have made beneficial improvements. However, both can only replace the electric energy metering module of the high-voltage electric energy meter with power on, and both will destroy the structure of the voltage sensor, current sensor and electric energy metering module of the high-voltage electric energy meter as a whole. This will bring new problems to the error inspection and management of the high-voltage electric energy meter, such as the need to increase the error inspection of the voltage sensor, current sensor and electric energy metering module, which will increase the workload of error inspection and management. In addition, the voltage sensor and current sensor of the high-voltage electric energy meter cannot be replaced with power on, and the voltage sensor, current sensor and overall error inspection and replacement are still inconvenient.

[0005] To solve this problem, the Chinese invention patent "A high-voltage electric energy device with convenient disassembly and assembly" has a publication number of CN109100554A. Although the voltage sensor and current sensor can be replaced together, it is still not convenient to replace them when they are used in high-voltage electric energy metering cabinets or box-type transformers. [Summary of the invention]

[0006] The present invention overcomes the shortcomings of the above-mentioned technology and provides a trolley-type single-phase high-voltage electric energy meter that can be replaced under power and its application. The high-voltage electric energy meter can be replaced without power outage, and can further realize uninterrupted metering replacement under load and prevent mistaken replacement.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A trolley-type high-voltage electric energy meter that can be replaced with power includes a trolley-type single-phase high-voltage electric energy meter 100. The trolley-type single-phase high-voltage electric energy meter 100 includes a trolley box 1, and a power fixed contact 11, a load fixed contact 12, and a voltage fixed contact 13 connected to the high-voltage power grid are arranged on one wall of the trolley box 1. A trolley frame 2 is arranged in the trolley box 1, and a detachable single-phase high-voltage metering part 3 is arranged in the trolley frame 2. The power supply end, load end, and voltage end in the single-phase high-voltage metering part 3 are plug-in connected to the power supply fixed contact 11, the load fixed contact 12, and the voltage fixed contact 13 through a power supply moving contact 41, a load moving contact 42, and a voltage moving contact 43, respectively.

[0009] As described above, a trolley-type high-voltage electric energy meter that can be replaced under power is provided with a spare trolley-type single-phase high-voltage electric energy meter 100 next to the trolley-type single-phase high-voltage electric energy meter 100, and the power supply fixed contacts 11, load fixed contacts 12, and voltage fixed contacts 13 of the two trolley carriages 1 are respectively connected.

[0010] As described above, a trolley-type high-voltage electric energy meter that can be replaced with power is provided with a detachable single-phase high-voltage metering part 3 on the trolley frame 2, and the single-phase high-voltage metering part 3 is provided with a power moving contact 41, a load moving contact 42, and a voltage moving contact 43 connected to the power end, the load end, and the voltage end in the single-phase high-voltage metering part 3.

[0011] As described above, a trolley-type high-voltage electric energy meter that can be replaced with power is provided on the trolley frame 2. A vehicle frame 4 is provided on one side of the vehicle frame 4. A power moving contact 41, a load moving contact 42, and a voltage moving contact 43 are respectively connected to the power fixed contact 11, the load fixed contact 12, and the voltage fixed contact 13. The single-phase high-voltage metering part 3 can be detachably installed on the vehicle frame 4. The power end, the load end, and the voltage end of the single-phase high-voltage metering part 3 are respectively connected to the other end of the power moving contact 41, the other end of the load moving contact 42, and the other end of the voltage moving contact 43 through a deformable connecting piece 44.

[0012] As described above, in the trolley-type high-voltage electric energy meter that can be replaced while powered, the two trolley carriages 1 are arranged side by side and are provided with an anti-mistake locking device 6.

[0013] As described above, a trolley-type high-voltage electric energy meter that can be replaced while powered, the anti-mistake locking device 6 includes a plurality of frame sliders 61 provided on the outward side of the trolley frame 2, a slide bar 62 for covering a hand-operated lever socket 53 is provided inside the frame slider 61, and a slide bar through hole 63 that penetrates the two side surfaces and allows the slide bar 62 to pass through is provided on the contact surface of the two trolley carriages 1.

[0014] As described above, a trolley-type high-voltage electric energy meter that can be replaced with electricity, the anti-mistake locking device 6 includes a plurality of frame slide buckles 61 on the outward side of the trolley frame 2, a slide bar 62 for covering a hand-operated lever socket 53 is provided in the frame slide buckle 61, a groove is provided on the inward side of the slide bar 62, a locking block 64 is provided in the middle of the groove, and movable locking links 65 are respectively provided on the parallel sides of the two trolley boxes 1, one end of the locking link 65 blocks the locking block 64 to limit the movement of the slide bar 62, and the other end of the locking link 65 is provided with a locking link reset spring 66 and a locking link connecting plate 67 extending into the trolley box 1, and a trolley frame connecting plate 68 is provided on the trolley frame 2, which pushes the locking link connecting plate 67 after movement to make the locking link 65 disengage from the locking block 64.

[0015] As described above, in the trolley-type high-voltage electric energy meter that can be replaced while powered, the trolley frame 2 is provided with an anti-aircraft vehicle moving device 8.

[0016] As described above, a trolley-type high-voltage electric energy meter that can be replaced with electricity, the anti-aircraft vehicle moving device 8 includes a two-section folding rod 81, one end of one section of the two-section folding rod 81 is a slider and contacts the single-phase high-voltage metering part 3, a folding rod slider 82 is fixed on one side of the trolley box 1, the two sections of the two-section folding rod 81 are arranged in the folding rod slider 82, and the other end of the two-section folding rod 81 is provided with a baffle 83 which opens or covers the hand crank socket 53 as the trolley frame 2 moves.

[0017] As described above, a trolley-type high-voltage electric energy meter that can be replaced with power is provided with a short-circuit trolley 9 next to the trolley box 1. The short-circuit trolley 9 includes a short-circuit box 91. A first fixed contact 92 and a second fixed contact 93 connected to the power fixed contact 11 and the load fixed contact 12 are provided on one wall of the short-circuit box 91. A short-circuit frame 94 is provided in the short-circuit box 91. The short-circuit frame 94 is provided with a first moving contact 95 and a second moving contact 96 that are short-circuited with each other and plugged and unplugged with the first fixed contact 92 and the second fixed contact 93 respectively.

[0018] A connection structure for realizing three-phase three-wire high-voltage electric energy metering by using two trolley-type high-voltage electric energy meters that can be replaced with power. The trolley-type single-phase high-voltage electric energy meter 100 as described above, wherein there are two trolley-type single-phase high-voltage electric energy meters 100, and the trolley-type single-phase high-voltage electric energy meter 100 comprises a trolley-type high-voltage electric energy meter trolley box 1, wherein the power supply fixed contact 11 and the load fixed contact 12 on the trolley-type high-voltage electric energy meter trolley box 1 are respectively connected between the power supply and the load of the A phase of the high-voltage power grid, and the voltage fixed contact 13 is connected to the B phase line of the high-voltage power grid, and the power supply fixed contact 11 and the load fixed contact 12 on the other trolley-type high-voltage electric energy meter trolley box 1 are respectively connected between the power supply and the load of the C phase of the high-voltage power grid, and the voltage fixed contact 13 is connected to the B phase line of the high-voltage power grid.

[0019] A connection structure for realizing three-phase four-wire high-voltage electric energy metering by using three trolley-type high-voltage electric energy meters that can be replaced with electricity, the trolley-type single-phase high-voltage electric energy meter 100 as described above, wherein there are three trolley-type single-phase high-voltage electric energy meters 100, and the trolley-type single-phase high-voltage electric energy meter 100 comprises a trolley-type high-voltage electric energy meter trolley box 1, the power supply fixed contact 11 and the load fixed contact 12 on the first trolley-type high-voltage electric energy meter are respectively connected between the power supply and the load of the A phase of the high-voltage power grid, and the voltage fixed contact 13 is grounded, the power supply fixed contact 11 and the load fixed contact 12 on the second trolley-type high-voltage electric energy meter are respectively connected between the power supply and the load of the B phase of the high-voltage power grid, and the voltage fixed contact 13 is grounded, and the power supply fixed contact 11 and the load fixed contact 12 on the third trolley-type high-voltage electric energy meter are respectively connected between the power supply and the load of the C phase of the high-voltage power grid, and the voltage fixed contact 13 is grounded.

[0020] The beneficial effects of the present invention are:

[0021] 1. When there is only one handcart for each phase, as long as the load is powered off, the single-phase high-voltage metering part can be replaced with power on, because after the load is powered off, the current in the plug is very small and can be disconnected without an arc extinguishing device, so it can be replaced with power on. However, if the load cannot be powered off during operation, it cannot be replaced. When each phase is a double-hand car that can be short-circuited, it can not only be powered on, but also replaced with load, but the metering will be interrupted. When each phase is a double-hand car, it can not only be powered on, but also replaced with load without interrupting the metering.

[0022] 2. When an anti-aircraft vehicle device is installed, it can prevent the moving contact from connecting with the fixed contact when the vehicle is empty.

[0023] 3. When an anti-mistake locking device is installed, it can also prevent the single-phase high-voltage metering part from being replaced by mistake under load, ensuring the safety of live replacement operations. [Drawings]

[0024] Figure 1 This is the structural connection diagram of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power on;

[0025] Figure 2 This is a structural connection diagram of a trolley-type single-phase high-voltage electric energy meter that can be replaced under power and has a spare trolley;

[0026] Figure 3 This is a structural connection diagram of a trolley-type single-phase high-voltage electric energy meter with a short-circuit trolley that can be replaced under power;

[0027] Figure 4 This is the structural connection diagram of a trolley-type three-phase three-wire high-voltage electric energy meter that can be replaced under power;

[0028] Figure 5 It is a structural connection diagram of a trolley-type three-phase three-wire high-voltage electric energy meter that can be replaced under power and has a spare trolley;

[0029] Figure 6 It is a structural connection diagram of a trolley-type three-phase three-wire high-voltage electric energy meter with a short-circuit trolley that can be replaced under power;

[0030] Figure 7 This is the structural connection diagram of a trolley-type three-phase four-wire high-voltage electric energy meter that can be replaced under power;

[0031] Figure 8 It is a structural connection diagram of a trolley-type three-phase four-wire high-voltage electric energy meter that can be replaced under power and has a spare trolley;

[0032] Fig. 9 It is a structural connection diagram of a trolley-type three-phase four-wire high-voltage electric energy meter with a short-circuit trolley that can be replaced under power;

[0033] Fig.10 It is a structural schematic diagram of a first embodiment of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power;

[0034] Fig.11 It is a structural schematic diagram of a first embodiment of an anti-mistake locking device for a trolley-type single-phase high-voltage electric energy meter with a spare trolley or a trolley-type single-phase high-voltage electric energy meter with a short-circuit trolley that can be replaced under power;

[0035] Fig.12 This is a structural schematic diagram of a second embodiment of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power;

[0036] Fig.13 It is a structural schematic diagram of a second embodiment of an anti-mistake locking device for a trolley-type single-phase high-voltage electric energy meter with a spare trolley or a trolley-type single-phase high-voltage electric energy meter with a short-circuit trolley that can be replaced under power;

[0037] Fig.14 This is a structural schematic diagram of a third embodiment of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power;

[0038] Fig.15 It is a structural schematic diagram of a fourth embodiment of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power;

[0039] Fig.16 This is a schematic diagram of the structure of a short-circuit trolley structure embodiment 1;

[0040] Fig.17 It is a structural schematic diagram of a second embodiment of the short-circuited trolley structure. [Specific implementation method]

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not limited to the present invention.

[0042] like Figure 1 As shown, a trolley-type single-phase high-voltage electric energy meter that can be replaced with electricity includes a trolley-type single-phase high-voltage electric energy meter 100, the trolley-type single-phase high-voltage electric energy meter 100 includes a trolley box 1, an inner wall of the trolley box 1 is provided with a power supply fixed contact 11, a load fixed contact 12, and a voltage fixed contact 13 respectively connected to the high-voltage power grid, a trolley frame 2 is provided in the trolley box 1, and a detachable single-phase high-voltage metering part 3 is provided in the trolley frame 2, and the power supply end, load end, and voltage end of the single-phase high-voltage metering part 3 are respectively The power moving contact 41, the load moving contact 42, the voltage moving contact 43 are plug-in connected to the three fixed contacts of the power supply 11, the load fixed contact 12, and the voltage fixed contact 13, wherein the other ends of the three fixed contacts on the trolley box 1 are connected to the high-voltage power grid through the box bushing, the power supply fixed contact 11 is connected to the power supply, the load fixed contact 12 is connected to the load, the voltage fixed contact 13 is connected to the phase line or ground of a different phase from the power supply fixed contact 11, and the power supply connected to the power supply fixed contact 11 and the load connected to the load fixed contact 12 are of the same phase line.

[0043] The single-phase high-voltage metering unit 3 is equipped with a high-voltage sensor, a current sensor, an electric energy metering module, a communication module and a storage module. One end of the primary side of the current sensor is connected to one end of the primary side of the high-voltage sensor to form a power supply terminal, the other end of the primary side of the current sensor is a load terminal, and the other end of the primary side of the high-voltage sensor is a voltage terminal. The storage module can store the electric quantity value measured by the electric energy metering module. When a clock is provided, time-sharing metering can also be performed. The electric quantity value in the storage module can be transmitted to the meter reading receiving device via optical fiber or wireless communication.

[0044] like Figure 2 As shown, a spare trolley-type single-phase high-voltage electric energy meter 100 is provided next to the trolley-type single-phase high-voltage electric energy meter 100. The three fixed contacts on the trolley carriage 1 are respectively a power fixed contact 11, a load fixed contact 12, and a voltage fixed contact 13. The power fixed contacts 11, the load fixed contacts 12, and the voltage fixed contacts 13 of the two trolley carriages 1 are respectively connected. During operation, the single-phase high-voltage metering part 3 of the spare trolley-type single-phase high-voltage electric energy meter is as shown by the dotted line, which is standby and not connected, that is, it is in an empty car state. The other parts of the spare trolley-type single-phase high-voltage electric energy meter are the same as the trolley-type single-phase high-voltage electric energy meter 100.

[0045] When replacing the single-phase high-voltage metering unit 3, first install the new single-phase high-voltage metering unit 3 into the Figure 2 The right side of the trolley is empty, and the right side trolley frame is moved in the trolley box so that the moving contact on the single-phase high-voltage electric energy meter on the right side trolley frame is connected with the fixed contact on the trolley box, and then the left side trolley frame is moved out and the old single-phase high-voltage metering part is taken out to complete the replacement.

[0046] The trolley frame 2 is provided with an anti-empty trolley movement device 8 to prevent the moving contact of the trolley frame from being connected to the fixed contact of the trolley box in an empty state when the single-phase high-voltage metering unit 3 is not installed on the trolley frame.

[0047] An anti-mistake locking device 6 is provided between the two trolley carriages 1 to prevent the trolley frame 2 to which only one trolley-type single-phase high-voltage electric energy meter 10 is connected from being accidentally pulled out.

[0048] like Figure 3As shown, a short-circuit trolley 9 is provided next to the trolley box 1 of the trolley type single-phase high-voltage electric energy meter 100, and the short-circuit trolley 9 includes a short-circuit box 91, and a first fixed contact 92 and a second fixed contact 93 are provided on an inner wall of the short-circuit box 91. The power supply fixed contact 11 and the load fixed contact 12 of the trolley box 1 of the trolley type single-phase high-voltage electric energy meter 100 are respectively connected to the first fixed contact 92 and the second fixed contact 93 of the short-circuit box 91, and a short-circuit frame 94 is provided in the short-circuit box 91. The short-circuit frame 94 is provided with a first moving contact 95 and a second moving contact 96 that are short-circuited with each other and are plug-in connected to the first fixed contact 92 and the second fixed contact 93, respectively. The short-circuit frame 94 does not need to be provided with a single-phase high-voltage metering part 3 and an anti-aircraft vehicle moving device 8, and other parts of the short-circuit trolley are the same as those of the trolley type single-phase high-voltage electric energy meter 100.

[0049] During operation, the single-phase high-voltage metering unit 3 of the trolley-type single-phase high-voltage energy meter 100 is connected to the high-voltage power grid, and the first moving contact 95 and the second moving contact 96 of the short-circuiting trolley 9 are disconnected from the first fixed contact 92 and the second fixed contact 93 on the short-circuiting trolley box 91 respectively; when replacing, first Figure 3 The short-circuit frame 94 on the right is moved in to connect the moving contact and the fixed contact on the short-circuit box 91. After replacing the single-phase high-voltage metering part 3 of the left trolley frame 2 in the figure, it is connected to the power grid, and then the connection of the short-circuit frame 94 on the right is disconnected to complete the replacement.

[0050] like Figure 4 As shown, it is a connection structure for realizing three-phase three-wire high-voltage electric energy metering by using two trolley-type single-phase high-voltage electric energy meters, wherein the power supply fixed contact 11 and the load fixed contact 12 on the trolley car box 1 of one trolley-type single-phase high-voltage electric energy meter are respectively connected between the power supply of phase A of the high-voltage grid and the load, and the voltage fixed contact 13 is connected to the phase B line of the high-voltage grid, and the power supply fixed contact 11 and the load fixed contact 12 on the trolley car box 1 of the other trolley-type single-phase high-voltage electric energy meter are respectively connected between the power supply of phase C of the high-voltage grid and the load, and the voltage fixed contact 13 is connected to the phase B line of the high-voltage grid.

[0051] like Figure 5 As shown, in Figure 4 A spare trolley-type single-phase high-voltage electric energy meter is respectively arranged next to the two trolley-type single-phase high-voltage electric energy meters, and the power fixed contact 11, the load fixed contact 12, and the voltage fixed contact 13 of the two trolley carriages 1 connected to the same box body are respectively connected.

[0052] like Figure 6 As shown, in Figure 4 A short-circuit trolley is respectively arranged next to the two trolley-type single-phase high-voltage electric energy meters, and the power fixed contact 11 connected to the same phase line is connected to the first fixed contact 92, and the load fixed contact 12 is connected to the second fixed contact 93.

[0053] like Figure 7 As shown, a connection structure for realizing three-phase four-wire high-voltage electric energy metering using three trolley-type single-phase high-voltage electric energy meters is shown, wherein the power supply fixed contact 11 and the load fixed contact 12 on the first trolley-type single-phase high-voltage electric energy meter are respectively connected between the power supply and the load of phase A of the high-voltage power grid, and the voltage fixed contact 13 is grounded, the power supply fixed contact 11 and the load fixed contact 12 on the second trolley-type single-phase high-voltage electric energy meter are respectively connected between the power supply and the load of phase B of the high-voltage power grid, and the voltage fixed contact 13 is grounded, and the power supply fixed contact 11 and the load fixed contact 12 on the third trolley-type single-phase high-voltage electric energy meter are respectively connected between the power supply and the load of phase C of the high-voltage power grid, and the voltage fixed contact 13 is grounded.

[0054] like Figure 8 As shown, in Figure 7 A spare trolley-type single-phase high-voltage electric energy meter is respectively arranged next to the three trolley-type single-phase high-voltage electric energy meters, and the power fixed contact 11, the load fixed contact 12, and the voltage fixed contact 13 of the two trolley carriages 1 connected to the same phase line are respectively connected.

[0055] like Fig. 9 As shown, in Figure 7 A short-circuited trolley is respectively arranged next to the three trolley-type single-phase high-voltage electric energy meters; the power fixed contact 11 connected to the same phase line is connected to the first fixed contact 92 , and the load fixed contact 12 is connected to the second fixed contact 93 .

[0056] like Figure 1-9 The trolley box shown can be installed in the cavity of a high-voltage electric energy metering cabinet or a box-type transformer, and can be integrated into one or become a part thereof. The connected boxes can be combined into a large box, or the boxes can be combined in phases, and the trolleys do not need to be separated by intervals.

[0057] Embodiment 1 of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power:

[0058] like Figure 10-11 As shown, a trolley frame 2 is provided in the trolley box 1, and a detachable single-phase high-voltage metering part 3 is provided on the trolley frame 2. The single-phase high-voltage metering part 3 is provided with a power moving contact 41, a load moving contact 42, and a voltage moving contact 43 connected to the power end, the load end, and the voltage end in the single-phase high-voltage metering part 3.

[0059] The trolley frame 2 is provided with wheels and a driving device 5 for driving the trolley frame 2 to move in the trolley box 1. The driving device 5 includes a cross bar 54 arranged on the open end of the trolley box 1, and a rotatable driving screw 52 is arranged on the cross bar 54. The trolley frame 2 is provided with a driving nut 51 threadedly connected with the driving screw 52, ​​and a hand crank socket 53 is provided on the driving screw 52. The driving screw 52 is driven to rotate by rotating the hand crank, so that the driving nut 51 moves on the driving screw 52, ​​thereby realizing the movement of the trolley frame 2 in the trolley box 1. The power moving contact 41, load moving contact 42, and voltage moving contact 43 of the single-phase high-voltage metering part 3 on the trolley frame are respectively connected to the power fixed contact 11, load fixed contact 12, and voltage fixed contact 13 arranged on an inner wall of the trolley box 1 in a plug-in manner.

[0060] Among them, a cross bar locking device 7 is provided between the cross bar 54 and the trolley box 1, and cavities are respectively provided at both ends of the cross bar 54, in which a cross bar spring 71 and a locking rod 72 are sequentially provided. The locking rod 72 extends out of the cavity under the action of elastic force and is inserted into the locking hole of the trolley box 1 to realize the clamping connection between the cross bar 54 and the trolley box 1. A locking rod handle 73 is provided on the locking rod 72 for pushing the locking rod 72 to compress the cross bar spring 71. When releasing the clamping connection between the cross bar 54 and the trolley box 1, it is only necessary to push the locking rod handle 73 inward to compress the cross bar spring 71, and retract the locking rod 72 into the cavity of the cross bar 54 to release the clamping connection between the cross bar 54 and the trolley box 1. At this time, the trolley frame 2 can be taken out from the trolley box 1, and the single-phase high-voltage metering part 3 on the trolley frame can be replaced.

[0061] The fixed contact on the trolley box 1 passes through the trolley box and is connected to the high-voltage power grid through an insulating sleeve with a conductive core. In order to increase the creepage distance and the discharge path, an insulating cover is provided on the insulating sleeve.

[0062] The trolley frame 2 is provided with an anti-aircraft vehicle moving device 8, which includes a two-section folding rod 81, one end of one section of the two-section folding rod 81 is a slider and contacts the single-phase high-voltage metering part 3, a folding rod slider 82 is fixed on one side of the trolley box 1, the two sections of the two-section folding rod 81 are arranged in the folding rod slider 82, and the other end of the two-section folding rod 81 is provided with a baffle 83 which opens or covers the hand crank socket 53 as the trolley frame 2 moves.

[0063] When a single-phase high-voltage metering unit 3 is installed on the trolley frame, the single-phase high-voltage metering unit 3 pushes and lifts the first section rod of the two-section folding rod 81, and at the same time drives the second section rod to move upward to lift the baffle 83, thereby opening the hand crank jack 53 blocked by the baffle 83. When the single-phase high-voltage metering unit 3 is not installed, the sliding head of the first section rod of the two-section folding rod 81 loses the thrust. Under the action of gravity, it drives the second section rod of the two-section folding rod 81 to fall, so that the baffle 83 covers the hand crank jack 53, and the hand crank cannot be inserted to rotate the drive screw 52, thereby preventing the empty trolley without the single-phase high-voltage metering unit 3 from moving and causing the moving contact to misconnect with the fixed contact of the trolley box.

[0064] Embodiment 1 of the anti-misoperation locking device for a trolley-type single-phase high-voltage energy meter with a replaceable live spare trolley or a trolley-type single-phase high-voltage energy meter with a short-circuiting trolley:

[0065] As Fig.11 shown, a spare trolley-type single-phase high-voltage energy meter 100 is provided beside the trolley-type single-phase high-voltage energy meter 100. The two trolley boxes 1 are arranged side by side, and an anti-misoperation locking device 6 is provided between the two trolley boxes 1. The anti-misoperation locking device 6 includes a plurality of frame sliding buckles 61 provided on the outer side surface of the trolley frame 2. A sliding bar 62 for blocking a hand crank jack 53 is provided in the frame sliding buckle 61, and a locking block 64 is provided in the middle. Movable locking connecting rods 65 are respectively provided on the side where the two trolley boxes 1 are connected. One end of the locking connecting rod 65 blocks the locking block 64 to limit the movement of the sliding bar 62. The other end of the locking connecting rod 65 is provided with a locking connecting rod return spring 66 and a locking connecting rod connecting plate 67 extending into the trolley box 1. A trolley frame connecting plate 68 for pushing the locking connecting rod connecting plate 67 on the trolley frame 2 to make the locking connecting rod 65 disengage from the locking block 64 after moving is provided on the trolley frame 2. The cross-section of the sliding bar 62 is in a "C" shape, and the opening of the "C" shape faces the insertion direction of the lower end of the locking connecting rod 65. A locking block 64 is provided in the middle inside. In the figure, the left trolley frame is in the position where the moving contact of the single-phase high-voltage metering unit 3 is connected to the fixed contact of the trolley box. At this time, the trolley frame connecting plate 68 on the left trolley frame pushes the locking connecting rod connecting plate 67 at the top of the locking connecting rod 65, compressing the locking connecting rod return spring 66, so that the lower end of the locking connecting rod 65 disengages from the locking block 64 on the sliding bar 62, and the left locking device is unlocked. The right trolley frame is in the non-moved-in position. Under the action of the locking connecting rod return spring 66, the right locking connecting rod 65 inserts into the groove of the sliding bar 62 to block the locking block 64, and the right locking device is locked. At this time, the sliding bar 62 can only move to the left while blocking the left hand crank jack 53 to achieve locking.

[0066] If the left single-phase high-voltage metering part 3 needs to be replaced, if the right side is a spare trolley, the single-phase high-voltage metering part 3 needs to be installed on the right trolley frame, and the right trolley frame 2 needs to be moved so that the moving contact is inserted into the fixed contact. The two trolleys are unlocked at the same time, and the locking links 65 of the two trolleys are disengaged from the locking block 64 at the same time. The slide bar 62 can be moved to the right to expose the left hand crank lever jack 53 blocked on the left side, and the left trolley frame 2 is moved out by rotating the inserted hand crank lever, and then the cross bar spring 71 is compressed by pushing the locking rod handle 73 inward, and the locking rod 72 is retracted into the cavity of the cross bar 54, so that the cross bar 54 and the left trolley frame 2 can be taken out from the trolley box 1 together, and the single-phase high-voltage metering part 3 on the trolley frame 2 is replaced. The principle is the same when replacing the single-phase high-voltage metering part 3 on the right side; if the right side is a short-circuited trolley, the right trolley frame 2 is directly moved in, so that the moving contact is inserted into the fixed contact, unlocking is achieved, and the single-phase high-voltage metering part 3 is replaced.

[0067] Similarly, a short-circuit trolley 9 is provided next to the trolley-type single-phase high-voltage electric energy meter 100, and the two trolley carriages are arranged side by side and are provided with an anti-mistake locking device 6, and the structure of the anti-mistake locking device is the same as above.

[0068] Embodiment 2 of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power:

[0069] like Fig.12 , Fig.13 As shown, what is different from the first embodiment of the trolley-type single-phase high-voltage electric energy meter that can be replaced with power is that the trolley frame 2 is provided with a driving device 5 for driving the trolley frame 2 to move in the trolley box 1, and the driving device 5 includes a driving nut 51 fixed on the trolley box 1, and the trolley frame 2 is provided with a driving screw 52 that can rotate on the trolley frame 2, and the driving screw 52 is threadedly connected with the driving nut 51 to drive the trolley frame 2 to move, and a hand crank insertion hole 53 is provided on the connecting end of the driving screw 52 and the trolley frame 2, and a hand crank is inserted to rotate the driving screw.

[0070] Embodiment 2 of the anti-mistake locking device of a trolley-type single-phase high-voltage electric energy meter with a spare trolley or a trolley-type single-phase high-voltage electric energy meter with a short-circuit trolley that can be replaced under power:

[0071] like Fig.13As shown, a spare trolley-type single-phase high-voltage electric energy meter 100 is provided next to the trolley-type single-phase high-voltage electric energy meter 100, and the two trolley carriages 1 are arranged side by side and are provided with an anti-error locking device 6, which includes a plurality of frame slide buckles 61 on the outward side of the trolley frame 2, and a slide bar 62 for blocking the hand crank lever socket 53 is provided in the frame slide buckle 61. The two trolley carriages 1 are connected on the side provided with a slide bar through hole 63 that penetrates the two side surfaces and allows the slide bar 62 to pass through. In the figure, the left trolley frame is in a position where the moving contact of the single-phase high-voltage metering part 3 is connected to the fixed contact of the trolley carriage, while the right trolley frame is not moved into the position, blocking the slide bar 62 from continuing to move after passing through the slide bar through hole 63, so the slide bar 62 blocks the hand crank lever socket 53 on the left trolley frame to achieve the locking of the left trolley.

[0072] If the left single-phase high-voltage metering part 3 needs to be replaced, if the right side is a spare trolley, the single-phase high-voltage metering part 3 needs to be installed on the right trolley frame, and the right trolley frame needs to be moved in so that the moving contact is inserted into the fixed contact. At this time, the two trolleys are in the insertion position at the same time, and the slide bar 62 can pass through the slide bar through hole 63 and move to the right into the right frame slide buckle 61, insert the hand crank into the socket 53, turn the hand crank to move the left trolley frame 2 out of the trolley box 1, replace the single-phase high-voltage metering part 3 on the trolley frame, and the principle of replacing the single-phase high-voltage metering part 3 on the right trolley frame is the same; if the right side is a short-circuited trolley, directly move the right trolley frame in so that the moving contact is inserted into the fixed contact to achieve unlocking and replace the single-phase high-voltage metering part 3.

[0073] Similarly, a short-circuit trolley 9 is provided next to the trolley-type single-phase high-voltage electric energy meter 100, and the two trolley carriages are arranged side by side and are provided with an anti-mistake locking device 6, and the structure of the anti-mistake locking device is the same as above.

[0074] Embodiment 3 of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power:

[0075] like Fig.14 As shown, a vehicle frame 4 is added on the basis of the trolley frame 2 of the first embodiment, and a power moving contact 41, a load moving contact 42, and a voltage moving contact 43 are respectively connected to the power fixed contact 11, the load fixed contact 12, and the voltage fixed contact 13 on one side of the vehicle frame 4. The single-phase high-voltage metering part 3 can be detachably installed on the vehicle frame 4, and the power end, the load end, and the voltage end of the single-phase high-voltage metering part 3 are respectively connected to the other end of the power moving contact 41, the other end of the load moving contact 42, and the other end of the voltage moving contact 43 through a deformable connecting piece 44. Through the vehicle frame 4, there is no need to require the single-phase high-voltage metering part 3 to have a moving contact of a specific length, which can increase the versatility of the single-phase high-voltage metering part 3.

[0076] In order to increase the creepage distance and the discharge path, an insulating partition is provided in the vehicle frame 4 to separate the deformable connecting pieces 44 that are not connected in the same phase.

[0077] Embodiment 4 of a trolley-type single-phase high-voltage electric energy meter that can be replaced with power;

[0078] like Fig.15 As shown, the vehicle-mounted frame 4 in the third embodiment is added on the basis of the second embodiment.

[0079] Short-connector trolley embodiment 1:

[0080] like Fig.16 As shown, the short-circuiting trolley 9 includes a short-circuiting trolley box 91, and a first fixed contact 92 and a second fixed contact 93 are provided on an inner wall of the short-circuiting trolley box 91. A short-circuiting frame 94 is provided in the short-circuiting trolley box 91, and a first moving contact 95 and a second moving contact 96 are provided on the short-circuiting frame 94, which are short-circuited with each other and are respectively connected to the first fixed contact 92 and the second fixed contact 93 in a plug-in manner. The short-circuiting frame 94 does not need to be provided with a single-phase high-voltage metering part 3 and an anti-aircraft trolley sliding device 8. Other parts of the short-circuiting trolley 9 are the same as the embodiment 1 of the trolley-type single-phase high-voltage electric energy meter that can be replaced with power.

[0081] Short-connection trolley embodiment 2:

[0082] like Fig.17 As shown, the short-circuit trolley 9 includes a short-circuit trolley box 91, and a first fixed contact 92 and a second fixed contact 93 are arranged on an inner wall of the short-circuit trolley box 91. A short-circuit frame 94 is arranged in the short-circuit trolley box 91, and a first moving contact 95 and a second moving contact 96 are arranged on the short-circuit frame 94, which are short-circuited with each other and plug-in connected to the first fixed contact 92 and the second fixed contact 93, respectively. The short-circuit frame 94 does not need to be provided with a single-phase high-voltage metering part 3 and an anti-aircraft trolley sliding device 8. The other parts of the short-circuit trolley 9 are the same as the second embodiment of the trolley-type single-phase high-voltage electric energy meter that can be replaced with electricity. The difference between the two embodiments of the short-circuit trolley is mainly the different driving device.

[0083] The combination of the trolley-type single-phase high-voltage electric energy meter and the short-circuit trolley will interrupt the measurement when the single-phase high-voltage metering part 3 is replaced under power, but has the advantages of simplified structure and reduced equipment cost.

[0084] The above descriptions are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A trolley-type high-voltage electric energy meter that can be replaced with power, characterized in that: The invention comprises a trolley-type single-phase high-voltage electric energy meter (100), the trolley-type single-phase high-voltage electric energy meter (100) comprising a trolley box (1), a power supply fixed contact (11), a load fixed contact (12), and a voltage fixed contact (13) connected to a high-voltage power grid being provided on one wall of the trolley box (1), a trolley frame (2) being provided in the trolley box (1), a detachable single-phase high-voltage metering unit (3) being provided in the trolley frame (2), and a voltage fixed contact (13) being provided in the single-phase high-voltage metering unit (3). The source end, the load end and the voltage end are respectively connected to the power supply fixed contact (11), the load fixed contact (12) and the voltage fixed contact (13) in a plug-in manner via the power supply moving contact (41), the load moving contact (42) and the voltage moving contact (43); a spare trolley-type single-phase high-voltage electric energy meter (100) is provided next to the trolley-type single-phase high-voltage electric energy meter (100); the power supply fixed contact (11), the load fixed contact (12) and the voltage fixed contact (13) of the two trolley carriages (1) are respectively connected; The trolley frame (2) is provided with an anti-aircraft vehicle moving device (8), the anti-aircraft vehicle moving device (8) comprising a two-section folding rod (81), one end of one section of the two-section folding rod (81) being a slider and contacting the single-phase high-voltage metering unit (3), a folding rod slide buckle (82) being fixed on one side of the trolley box (1), the two sections of the two-section folding rod (81) being arranged in the folding rod slide buckle (82), the other end of the two-section folding rod (81) being provided with a baffle (83) which opens or covers the hand crank lever jack (53) as the trolley frame (2) moves, and the trolley frame (2) is provided with a baffle (83) which opens or covers the hand crank lever jack (53) as the hand crank frame (2) moves. A short-circuit trolley (9) is provided next to the box (1), the short-circuit trolley (9) comprising a short-circuit trolley box (91), a first fixed contact (92) and a second fixed contact (93) respectively connected to a power supply fixed contact (11) and a load fixed contact (12) are provided on one wall of the short-circuit trolley box (91), a short-circuit trolley frame (94) is provided in the short-circuit trolley box (91), and a first movable contact (95) and a second movable contact (96) are provided on the short-circuit trolley frame (94) which are short-circuited with each other and are pluggably connected to the first fixed contact (92) and the second fixed contact (93), respectively. Two trolley boxes (1) are provided and arranged side by side, and an anti-mistaken locking device (6) is provided between the two trolley boxes (1), the anti-mistaken locking device (6) comprising a plurality of frame slide buckles (61) provided on the outward side of the trolley frame (2), a slide bar (62) for covering a hand crank insertion hole (53) is provided in the frame slide buckle (61), and a slide bar through hole (63) penetrating the two side surfaces and allowing the slide bar (62) to pass through is provided on the contact surface of the two trolley boxes (1); or the anti-mistaken locking device (6) comprises a plurality of frame slide buckles (61) provided on the outward side of the trolley frame (2), a slide bar (62) for covering a hand crank insertion hole (53) is provided in the frame slide buckle (61). A slide bar (62) of the hand crank socket (53) is provided with a groove on the inner side of the slide bar (62), and a locking block (64) is provided in the middle of the groove. A movable locking link (65) is provided on the parallel sides of the two trolley boxes (1), one end of the locking link (65) blocks the locking block (64) to limit the movement of the slide bar (62), and the other end of the locking link (65) is provided with a locking link return spring (66) and a locking link connecting plate (67) extending into the trolley box (1). A trolley frame connecting plate (68) is provided on the trolley frame (2) for pushing the locking link connecting plate (67) after movement to make the locking link (65) disengage from the locking block (64).

2. A trolley-type high-voltage electric energy meter that can be replaced with power on according to claim 1, characterized in that: The trolley frame (2) is provided with a detachable single-phase high-voltage metering unit (3), and the single-phase high-voltage metering unit (3) is provided with a power supply moving contact (41), a load moving contact (42), and a voltage moving contact (43) connected to a power supply end, a load end, and a voltage end in the single-phase high-voltage metering unit (3).

3. The trolley-type high-voltage electric energy meter that can be replaced with power on according to claim 1 is characterized in that: The trolley frame (2) is provided with a vehicle frame (4), and a power moving contact (41), a load moving contact (42), and a voltage moving contact (43) are provided on one side surface of the vehicle frame (4), which are respectively connected to the power fixed contact (11), the load fixed contact (12), and the voltage fixed contact (13). The single-phase high-voltage metering unit (3) is detachably mounted on the vehicle frame (4), and the power end, the load end, and the voltage end of the single-phase high-voltage metering unit (3) are respectively connected to the other end of the power moving contact (41), the other end of the load moving contact (42), and the other end of the voltage moving contact (43) through a deformable connecting piece (44).

4. A connection structure for realizing three-phase three-wire high-voltage electric energy metering by using two handcart-type high-voltage electric energy meters that can be replaced with electricity, characterized in that: The invention comprises a trolley-type single-phase high-voltage electric energy meter (100) as claimed in any one of claims 1 to 3, wherein there are two trolley-type single-phase high-voltage electric energy meters (100), and the trolley-type single-phase high-voltage electric energy meters (100) comprise a trolley-type high-voltage electric energy meter trolley box (1), wherein the power supply fixed contact (11) and the load fixed contact (12) on the trolley-type high-voltage electric energy meter trolley box (1) are respectively connected between the power supply of the A phase of the high-voltage power grid and the load, and the voltage fixed contact (13) is connected to the B phase line of the high-voltage power grid, and the power supply fixed contact (11) and the load fixed contact (12) on the trolley-type high-voltage electric energy meter trolley box (1) are respectively connected between the power supply of the C phase of the high-voltage power grid and the load, and the voltage fixed contact (13) is connected to the B phase line of the high-voltage power grid.

5. A connection structure for realizing three-phase four-wire high-voltage electric energy metering by using three handcart-type high-voltage electric energy meters that can be replaced with electricity, characterized in that: The invention comprises three trolley-type single-phase high-voltage electric energy meters (100) as described in any one of claims 1 to 3, wherein there are three trolley-type single-phase high-voltage electric energy meters (100), each trolley-type single-phase high-voltage electric energy meter (100) comprising a trolley-type high-voltage electric energy meter trolley box (1), wherein the power supply fixed contact (11) and the load fixed contact (12) on the first trolley-type high-voltage electric energy meter are respectively connected between the power supply of phase A of the high-voltage power grid and the load, and the voltage fixed contact (13) is grounded, the power supply fixed contact (11) and the load fixed contact (12) on the second trolley-type high-voltage electric energy meter are respectively connected between the power supply of phase B of the high-voltage power grid and the load, and the voltage fixed contact (13) is grounded, and the power supply fixed contact (11) and the load fixed contact (12) on the third trolley-type high-voltage electric energy meter are respectively connected between the power supply of phase C of the high-voltage power grid and the load, and the voltage fixed contact (13) is grounded.

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