Guide rail type electric energy meter voltage and current sampler

Abstract

A guide rail type electric energy meter voltage and current sampler disclosed by the present invention comprises a left hoop plate and a right hoop plate, one end of the left hoop plate is hinged to the right hoop plate, a locking mechanism is arranged between the other end of the left hoop plate and the right hoop plate, and current sampling mechanisms are arranged on the left hoop plate and the right hoop plate. The current sampling mechanism is provided with a first connector and a second connector which can be connected together at the position of the locking mechanism, a voltage sampling mechanism is arranged on the left hoop plate or the right hoop plate, the voltage sampling mechanism is provided with a pressing type voltage sampling piece, and the locking mechanism comprises a locking plate which is hinged to the right hoop plate and provided with first ratchets. The left hoop plate is provided with a clamping hole matched with the locking plate, and the clamping hole is provided with second ratchets matched with the first ratchets. Compared with the prior art, the device is simple in structure and can be conveniently operated by one hand in a narrow space. The locking plate arranged in a hinged mode facilitates angle adjustment in the clamping hole, the clamping hole and the ratchets are arranged, so that the clamping effect of the wire is good, and follow-up voltage sampling is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of voltage and current sampling, and in particular to a rail-type electric energy meter voltage and current sampler. Background Art

[0002] Currently, most of the non-on-board chargers (DC charging piles) for electric vehicles use a three-phase smart energy meter installed at the incoming line to calculate the AC power. The DC charging pile then has a built-in DC energy meter to measure the DC power output by each charging gun. The power consumption information collection system can only collect the power consumption information of the three-phase smart energy meter installed at the incoming line. Since the DC energy meter of each charging gun cannot be installed with a carrier communication module, it is impossible to collect the power consumption information of the DC energy meter.

[0003] In order to achieve the measurement and collection of the DC charging pile inlet, the DC energy meter of the charging gun, and the charging pile billing control unit at one time, some energy meter manufacturers have launched DC charging pile rail meters. However, there are some problems in the actual installation of the rail meter, such as unsuccessful voltage puncture sampling, difficulty in installing the voltage sampler due to the narrow space of the pile body, and easy detachment of the current sensor. Usually, the installation of the rail meter requires the entire DC charging pile to be powered off, and the power outage will cause the charging pile fault alarm, affecting the equipment availability index of the local unit. The local unit will put forward power outage time control requirements for the installation of the DC charging pile rail meter. The failure of the rail meter voltage and current sampling in the actual installation process will lead to repeated wiring processes, and the increased power outage time will affect the equipment availability index. The rail meter and the load control terminal mostly use carrier communication. If the voltage puncture sampling fails, it means that the rail meter voltage line is not effectively connected and contacted, and ultimately the carrier communication cannot be realized to upload the collected information. The existing rail meter voltage and current access methods are difficult to meet the actual needs of efficient and batch installation of DC charging pile rails.

[0004] Therefore, it is necessary to provide a rail-type electric energy meter voltage and current sampler to solve the above technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and disclose a rail-type electric energy meter voltage and current sampler to solve the problem of difficulty in voltage and current sampling in a narrow pile space.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a rail-type electric energy meter voltage and current sampler, including a left hoop plate and a right hoop plate, one end of the left hoop plate is hinged to the right hoop plate, and a locking mechanism is provided between the other end and the right hoop plate, the left hoop plate and the right hoop plate are provided with a current sampling mechanism, the current sampling mechanism is provided with a first joint and a second joint that can be connected together at the locking mechanism, the first joint and the second joint are respectively fixed on the left hoop plate and the right hoop plate, the left hoop plate or the right hoop plate is provided with a voltage sampling mechanism, the voltage sampling mechanism is provided with a press-type voltage sampling piece, the locking mechanism includes a locking plate with a first ratchet hinged on the right hoop plate, the left hoop plate is provided with a clamping hole matching the locking plate, and the clamping hole is provided with a second ratchet matching the first ratchet.

[0007] Preferably, a flexible first supporting plate is provided between the locking plate and the right hoop plate.

[0008] Preferably, a ratchet plate is slidably provided on the hole wall of the clamping hole, the second ratchet is provided on the ratchet plate, and the ratchet plate is connected to a first elastic member for resetting the ratchet plate.

[0009] Preferably, the first elastic member is a spring or a flexible second supporting plate, and the first elastic member is arranged between the ratchet plate and the fixing plate on the left hoop plate.

[0010] Preferably, the clamping hole is provided with a rounded corner structure or a chamfered right-angle structure.

[0011] Preferably, a guide portion for guiding the first joint is provided above the second joint, and an avoidance groove matched with the guide portion is provided above the first joint.

[0012] Preferably, a support is fixed on the left hoop plate, a slide groove matching with the voltage sampling piece is provided between the support and the left hoop plate, and a support seat corresponding to the support is fixed on the right hoop plate.

[0013] Preferably, third ratchets are respectively provided on both sides of the voltage sampling piece, a blocking plate is slidably provided on the support, a fourth ratchet matching the third ratchet is provided on the blocking plate, and a second elastic member for resetting the blocking plate is connected to the blocking plate.

[0014] Preferably, the second elastic member is a spring, the tail of the blocking plate is a guide rod, the guide rod is slidably connected to the support, and the spring is arranged between the nut on the guide rod and the support.

[0015] Preferably, a reinforcing plate is fixed on the voltage sampling piece, the reinforcing plate is slidably connected to the support, and the voltage sampling piece and the reinforcing plate are distributed in a T shape.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The voltage and current sampler of the present invention is small in size and suitable for use in the narrow space of the DC charging pile. It is easy to operate and does not require carrying additional operating tools. You only need to find the appropriate position of the corresponding phase line at the bottom of the DC charging pile, and hold the left and right hoop plates tightly to clamp them on the phase line.

[0018] 2. During the installation process, there is no need to remove the connecting components at the inlet of the DC charging pile, and the original wiring structure of the DC charging pile is not changed. The Rogowski coil used adopts a semi-fixed structure, which is automatically connected as the left hoop plate and the right hoop plate are closed, and has the advantages of simple installation and saving installation time.

[0019] 3. The voltage sampling method is simple to operate and does not require the use of operating tools. When using it, you only need to press the voltage sampling piece. The voltage sampling piece can penetrate the insulation of the sampled wire and contact the metal part of the wire to smoothly sample the voltage, playing the role of transmitting the carrier signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0021] Figure 2 A top view of an embodiment of the present invention;

[0022] Figure 3 for Figure 2 A schematic cross-sectional view along line AA;

[0023] Figure 4 for Figure 2 The schematic cross-sectional view along line BB;

[0024] Figure 5 for Figure 3 A magnified schematic diagram of the structure at center C.

[0025] Description of reference numerals:

[0026] 1. Left hoop plate, 2. Right hoop plate, 3. Locking mechanism, 4. Current sampling mechanism, 5. Voltage sampling mechanism, 6. Support seat, 31. First ratchet, 32. Locking plate, 33. Clamping hole, 34. Second ratchet, 35. First support plate, 36. Ratchet plate, 37. First elastic member, 38. Fixing plate, 41. Guide part, 42. Rogowski coil, 51. Voltage sampling sheet, 52. Support, 53. Third ratchet, 54. Blocking plate, 55. Fourth ratchet, 56. Second elastic member, 57. Guide rod, 58. Nut, 59. Reinforcement plate, 100. Receiving groove. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0028] The following is combined with Figure 1 and attached Figure 5 To further illustrate the present invention, a rail-type electric energy meter voltage and current sampler includes a left hoop plate 1 and a right hoop plate 2, one end of the left hoop plate 1 is hinged to the right hoop plate 2, and a locking mechanism 3 is provided between the other end and the right hoop plate 2, a current sampling mechanism 4 is provided on the left hoop plate 1 and the right hoop plate 2, the current sampling mechanism 4 is provided with a first joint and a second joint that can be connected together at the locking mechanism 3, the first joint and the second joint are respectively fixed on the left hoop plate 1 and the right hoop plate 2, a voltage sampling mechanism 5 is provided on the left hoop plate 1 or the right hoop plate 2, the voltage sampling mechanism 5 is provided with a press-type voltage sampling piece 51, the locking mechanism 3 includes a locking plate 32 with a first ratchet 31 hinged on the right hoop plate 2, a clamping hole 33 matching with the locking plate 32 is provided on the left hoop plate 1, and a second ratchet 34 matching with the first ratchet 31 is provided on the clamping hole 33. The left hoop plate 1 and the right hoop plate 2 are closed on the measured wire. During the closing process, the locking plate 32 passes through the clamping hole 33, and the first ratchet 31 and the second ratchet 34 form an interlocking state to prevent the locking plate 32 from coming out of the clamping hole 33. The space enclosed by the left hoop plate 1 and the right hoop plate 2 is gradually tightened, so that the left hoop plate 1 and the right hoop plate 2 clamp the wire and maintain this state. Specifically, the diameter of the circular hole formed by the left hoop plate 1 and the right hoop plate 2 is slightly smaller than the diameter of the wire. In the process of closing the left hoop plate 1 and the right hoop plate 2 until the wire is clamped, the first connector is connected to the second connector to achieve the current measurement of the measured wire. After clamping the wire, the voltage sampling piece 51 is pressed to penetrate the copper wire inside the insulation to achieve the voltage measurement of the measured wire. This structural design is convenient for one-handed operation in a narrow space. Furthermore, during the closing process, the hinged locking plate 32 is conducive to adjusting the angle in the clamping hole 33 to avoid interference between the two. The setting of the clamping hole 33 and the setting of the ratchet enable the locking plate 32 to move only forward, and other directions are limited, so that the wire is clamped effectively, which is conducive to subsequent voltage sampling, and can also keep the first connector and the second connector in a good connection state, ensuring the success of current sampling.

[0029] As another embodiment of the present invention: Figure 5A flexible first support plate 35 is provided between the locking plate 32 and the right hoop plate 2. In the absence of external force, the first support plate 35 can keep the state of the locking plate 32 stable, so that the front section of the locking plate 32 can accurately enter the clamping hole 33, and then be constrained by the clamping hole 33, driving the locking plate 32 to rotate around the hinge axis, and the first support plate 35 will be squeezed during the rotation of the locking plate 32. Specifically, the first support plate 35 is fixed to the locking plate 32 and the right hoop plate 2 respectively by bonding. This setting is because there is an angle between the locking plate 32 and the right hoop plate 2, and the spring is not convenient to install. The flexible first support plate 35 is easy to install, which is conducive to the compact structure of the locking mechanism and reduces the volume of the device.

[0030] An implementation of the second ratchet 34 cooperating with the first ratchet 31: a ratchet plate 36 is slidably provided on the hole wall of the clamping hole 33, the second ratchet 34 is provided on the ratchet plate 36, and a first elastic member 37 for resetting the ratchet plate 36 is connected to the ratchet plate 36. When the locking plate 32 moves forward along the clamping hole 33, the second ratchet 34 is pushed open, and when the left hoop plate 1 and the right hoop plate 2 clamp the wire, the first elastic member 37 drives the second ratchet 34 to move toward the first ratchet 31, completing the interlocking.

[0031] As another embodiment of the present invention: the first elastic member 37 is a spring or a flexible second support plate, and the first elastic member 37 is disposed between the ratchet plate 36 and the fixing plate 38 on the left hoop plate 1. In this embodiment, the first elastic member 37 is a spring.

[0032] As another embodiment of the present invention: a chamfered structure or a chamfered right-angle structure is provided at one end of the locking hole 33 facing the locking plate 32, and the structural design facilitates guiding the locking plate 32 into the locking hole 33. Furthermore, a chamfered structure is provided at the front end of the locking plate 32.

[0033] As another embodiment of the present invention: Figure 2 A guide portion 41 for guiding the first joint is provided above the second joint. The first joint and the second joint are fixed to the left hoop plate 1 and the right hoop plate 2 respectively through the first fixing block and the second fixing block. The guide portion 41 is fixed to the first fixing block. An avoidance groove adapted to the guide portion 41 is provided above the first joint. The avoidance groove is provided on the second fixing block. When the left hoop plate 1 and the right hoop plate 2 are closed, the guide portion 41 guides the first joint to move toward the direction of the second joint so that the two can be accurately connected.

[0034] As another embodiment of the present invention: Figure 3 The guide portion 41 is provided with an arc groove adapted to the first joint. The design of the arc groove can effectively prevent the first joint from being offset during the forward movement, so that the two can be connected more accurately.

[0035] As another implementation of the present invention: the voltage sampling mechanism 5 is located outside the locking mechanism 3 .

[0036] As another embodiment of the present invention: a support 52 is fixed on the left hoop plate 1, a slide groove matching the voltage sampling piece 51 is provided between the support 52 and the left hoop plate 1, and a support seat 6 corresponding to the support 52 is fixed on the right hoop plate 2. This structural design avoids interference between the current sampling mechanism 4 and the voltage sampling mechanism 5; secondly, the voltage sampling piece 51 is made as close to the left hoop plate 1 as possible, which is conducive to ensuring successful sampling. Furthermore, the support seat 6 and the support seat 52 clamp the wire in the middle. When the voltage sampling piece 51 is pressed, the support seat 6 can resist the wire, effectively ensuring successful sampling.

[0037] An implementation method of pressing the voltage sampling piece 51: Figure 4 , third ratchet teeth 53 are respectively provided on both sides of the voltage sampling piece 51, a blocking plate 54 is slidably provided on the support 52, a fourth ratchet tooth 55 matching with the third ratchet tooth 53 is provided on the blocking plate 54, and a second elastic member 56 for resetting the blocking plate 54 is connected to the blocking plate 54. When the voltage sampling piece 51 is pressed, the fourth ratchet tooth 55 is pushed away when the voltage sampling piece 51 moves toward the wire, and when the voltage sampling piece 51 passes through the insulating layer of the wire and contacts the copper wire inside, the second elastic member 56 drives the fourth ratchet tooth 55 to reset so that it interlocks with the third ratchet tooth 53 again, preventing the voltage sampling piece 51 from moving backward, so that the voltage sampling piece 51 can stably keep in contact with the copper wire inside the wire.

[0038] An implementation of the second elastic member 56: the second elastic member 56 is a spring, the tail of the blocking plate 54 is a guide rod 57, the guide rod 57 is slidably connected to the support 52, and the spring is arranged between the nut 58 on the guide rod 57 and the support 52. Specifically, a gantry is provided on the support 52, and the spring sleeved on the guide rod 57 is arranged between the gantry and the nut 58. When the fourth ratchet 55 is pushed open, the spring is compressed, and the spring drives the fourth ratchet 55 to move toward the third ratchet 53 to complete the interlocking.

[0039] As another embodiment of the present invention: a reinforcing plate 59 is fixed on the voltage sampling piece 51, and the reinforcing plate 59 is slidably connected to the support 52. The voltage sampling piece 51 and the reinforcing plate 59 are distributed in a T shape, and the T-shaped structure is beneficial to improving the structural strength of the voltage sampling piece 51.

[0040] As another embodiment of the present invention: a pressing portion is provided at the rear end of the voltage sampling piece 51, and the pressing portion is fixedly connected to the reinforcing plate 59. The pressing portion is made of insulating material, and the area of ​​the upper end of the pressing portion is relatively large, which is convenient for operators to press.

[0041] Specifically, the side of the support 52 close to the wire is an arc surface.

[0042] As another embodiment of the present invention: a receiving groove 100 is provided on the outer side of the left hoop plate 1 and the right hoop plate 2, and the current sampling mechanism 4 and the locking mechanism 3 are both located in the receiving groove 100, and the receiving groove 100 can effectively protect the current sampling mechanism 4. Specifically, the current sampling mechanism 4 is provided with a Rogowski coil 42.

[0043] As another embodiment of the present invention: a lead hole is provided on the left hoop plate 1, and the sampling line on the voltage sampling plate passes through the lead hole into the receiving groove 100, and then is connected to the guide rail surface together with the sampling line on the Rogowski coil 42.

[0044] As another embodiment of the present invention, a grip plate is provided at the middle position of the left hoop plate 1 and the middle position of the right hoop plate 2, and the grip plate is fixed at the notch of the receiving groove 100. The left hoop plate 1 and the right hoop plate 2 are closed by holding the grip plate, and the design of the grip plate can prevent the receiving groove 100 from hurting fingers.

[0045] The end of the front end of the voltage sampling piece 51 is in a concave shape. The voltage sampling piece 51 penetrates the insulation of the sampled wire and contacts the metal part of the wire. The front end of the voltage sampling piece 51 is concave in the middle and convex on both sides, which further plays a fixing role. Specifically, the front ends of the convex parts on both sides are needle-shaped, and the concave parts are relatively blunt to better resist the wire. When the needle-shaped protrusions on both sides penetrate the sampled wire and contact the metal part of the wire, the concave parts resist the wire to form a stable fixed structure.

[0046] Specifically, the first support plate 35 is made of an elastic material, such as a sponge rod.

[0047] When the present invention is actually used, the incoming line of the DC charging pile is generally three-phase four-wire, and the rail meter needs to collect three-phase electricity, that is, three sets of voltage and current samplers are used, and the neutral line only needs to sample the voltage.

[0048] The voltage and current sampler of the present invention is small in size and suitable for use in the narrow space of the DC charging pile body. It is easy to operate and does not require the use of additional operating tools. It is only necessary to find the appropriate position of the corresponding phase line at the bottom of the DC charging pile, and hold the left hoop plate 1 and the right hoop plate 2 tightly to clamp them on the phase line. Secondly, there is no need to remove the connecting components at the DC charging pile inlet during the installation process, and the original wiring structure of the DC charging pile is not changed. The Rogowski coil 42 used adopts a semi-fixed structure, which is automatically connected as the left hoop plate 1 and the right hoop plate 2 are closed, and has the advantages of simple installation and saving installation time. Third, the voltage sampling method is simple to operate and does not require the aid of operating tools. When using it, you only need to press the voltage sampling piece 51. The voltage sampling piece 51 can penetrate the insulation of the sampled wire and contact the metal part of the wire to smoothly sample the voltage, thereby transmitting the carrier signal.

[0049] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rail-type electric energy meter voltage and current sampler, It is characterized in that It includes a left hoop plate and a right hoop plate, one end of the left hoop plate is hinged to the right hoop plate, and a locking mechanism is provided between the other end and the right hoop plate, the left hoop plate and the right hoop plate are provided with a current sampling mechanism, the current sampling mechanism is provided with a first joint and a second joint that can be connected together at the locking mechanism, the first joint and the second joint are respectively fixed on the left hoop plate and the right hoop plate, the left hoop plate or the right hoop plate is provided with a voltage sampling mechanism, the voltage sampling mechanism is provided with a press-type voltage sampling piece, the locking mechanism includes a locking plate with a first ratchet hinged on the right hoop plate, the left hoop plate is provided with a clamping hole matching the locking plate, and the clamping hole is provided with a second ratchet matching the first ratchet.

2. The rail-type electric energy meter voltage and current sampler according to claim 1, It is characterized in that A flexible first supporting plate is provided between the locking plate and the right hoop plate.

3. The rail-type electric energy meter voltage and current sampler according to claim 2, It is characterized in that A ratchet plate is slidably arranged on the hole wall of the clamping hole, the second ratchet is arranged on the ratchet plate, and the ratchet plate is connected with a first elastic member for resetting the ratchet plate.

4. The rail-type electric energy meter voltage and current sampler according to claim 3, It is characterized in that The first elastic member is a spring or a flexible second supporting plate, and the first elastic member is arranged between the ratchet plate and the fixing plate on the left hoop plate.

5. The rail-type electric energy meter voltage and current sampler according to claim 4, It is characterized in that The clamping hole is provided with a rounded corner structure or a chamfered right-angle structure.

6. The rail-type electric energy meter voltage and current sampler according to claim 1, It is characterized in that A guiding portion for guiding the first joint is provided above the second joint, and an avoidance groove matched with the guiding portion is provided above the first joint.

7. The rail-type electric energy meter voltage and current sampler according to claim 1, It is characterized in that A support is fixed on the left hoop plate, a slide groove matched with the voltage sampling piece is arranged between the support and the left hoop plate, and a support seat corresponding to the support is fixed on the right hoop plate.

8. The rail-type electric energy meter voltage and current sampler according to claim 7, It is characterized in that The voltage sampling piece is provided with third ratchets on both sides respectively, a blocking plate is slidably provided on the support, a fourth ratchets matching with the third ratchets are provided on the blocking plate, and a second elastic member for resetting the blocking plate is connected to the blocking plate.

9. The rail-type electric energy meter voltage and current sampler according to claim 8, It is characterized in that The second elastic member is a spring, the tail of the blocking plate is a guide rod, the guide rod is slidably connected to the support, and the spring is arranged between the nut on the guide rod and the support.

10. The rail-type electric energy meter voltage and current sampler according to claim 9, It is characterized in that A reinforcing plate is fixed on the voltage sampling piece, the reinforcing plate is slidably connected to the support, and the voltage sampling piece and the reinforcing plate are distributed in a T shape.

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