Photovoltaic power station anti-backflow device

Abstract

The utility model relates to the technical field of photovoltaic backflow prevention, and discloses a photovoltaic power station backflow prevention device, including a bidirectional ammeter, a bidirectional threaded rod is rotatably arranged on the housing of the bidirectional ammeter, and two sections of threads on the bidirectional threaded rod are each threadedly connected to a fixed plate; the bidirectional ammeter is located between the two fixed plates; a limit rod is fixedly arranged on the housing of the bidirectional ammeter, and the limit rod passes through the two fixed plates, and the two fixed plates are both slidably matched with the limit rod; a through hole is opened on the two fixed plates, and a monitoring hole is arranged on the bidirectional ammeter; a cable is passed through the monitoring hole, and the cable passes through the through holes on the two fixed plates; abutment components are installed in the two fixed plates, and each abutment component is in contact-limited cooperation with the cable. The utility model is provided with an abutment component, and when the position of the bidirectional ammeter is changed, the abutment component can be disengaged from the cable, and at this time the cable is not subjected to external force, thereby protecting the cable from damage and ensuring that the service life of the cable is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic backflow prevention, in particular to a backflow prevention device for a photovoltaic power station. Background Art

[0002] The anti-backflow monitoring device generally detects the current of the cable by installing a bidirectional ammeter. When a backflow occurs, the system can be informed in time to perform anti-backflow operations.

[0003] The Chinese patent announcement number is: CN220291985U, which discloses a photovoltaic power station backflow prevention monitoring device, including a bidirectional meter, a monitoring hole is installed on the bidirectional meter, a cable is inserted into the monitoring hole, one side of the bidirectional meter is a cable interface, and both ends of the bidirectional meter are fixedly connected with guide rods, the ends of the guide rods are connected to limit blocks, and the guide blocks are inserted on the guide rods. The guide blocks are part of the supporting structure, one side of the guide block is fixedly connected with a threading groove, and the other side of the threading groove is fixedly connected with a transmission block, and the bottom end of the transmission block is fixedly connected with a first ear, and the first ear is rotatably connected to the movable end of an electric push rod, and the driving end of the electric push rod is rotatably connected to a second ear, and the second ear is fixedly installed on the end face of the bidirectional meter.

[0004] Based on the above technical features, the problem that arises is that in the prior art, when the position of the bidirectional ammeter is changed, sliding friction occurs between the support mechanism and the cable, which easily causes wear on the outer sheath of the cable, thereby reducing the service life of the cable.

[0005] Therefore, it is necessary to solve the above problems through anti-backflow devices in photovoltaic power stations. Utility Model Content

[0006] The purpose of the utility model is to provide a backflow prevention device for a photovoltaic power station to solve the problem that "when changing the position of a bidirectional ammeter, sliding friction occurs between a supporting mechanism and a cable, which easily causes wear on the outer sheath of the cable, thereby reducing the service life of the cable".

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a photovoltaic power station backflow prevention device, comprising a bidirectional ammeter, a bidirectional threaded rod is rotatably arranged on the shell of the bidirectional ammeter, and the two sections of threads on the bidirectional threaded rod are each threadedly connected to a fixed plate; the bidirectional ammeter is located between the two fixed plates; a limit rod is fixedly arranged on the shell of the bidirectional ammeter, and the limit rod passes through the two fixed plates, and the two fixed plates are both slidably matched with the limit rod; a through hole is opened on the two fixed plates, and a monitoring hole is arranged on the bidirectional ammeter; a cable is passed through the monitoring hole, and the cable passes through the through holes on the two fixed plates; abutment components are installed in the two fixed plates, and each abutment component cooperates with the cable contact limit, so as to make the bidirectional ammeter and the cable relatively stationary.

[0008] Preferably, the abutment assembly includes a top plate and an adjusting threaded rod; a slide groove is provided in the fixed plate, and the slide groove is connected to the through hole in the fixed plate; the top plate is slidably arranged in the slide groove and cooperates with the cable contact abutment limiter; the adjusting threaded rod is inserted into the fixed plate and threadedly connected to the fixed plate, and the adjusting threaded rod extends into the slide groove of the fixed plate and is rotatably connected to the top plate in the slide groove.

[0009] Preferably, the two sections of threads on the bidirectional threaded rod have opposite rotation directions.

[0010] Preferably, the bidirectional ammeter is electrically connected to the monitoring instrument via a cable.

[0011] Preferably, the two fixing plates are symmetrically arranged with respect to the bidirectional ammeter.

[0012] Preferably, the through hole on the fixing plate is a circular hole, and the adjusting threaded rod is arranged along the radial direction of the through hole.

[0013] The technical effects and advantages of the utility model are as follows: the utility model is provided with an abutment component, and when the position of the bidirectional ammeter is changed, the abutment component can be out of contact with the cable. At this time, the cable is not subjected to external force, thereby protecting the cable from damage and ensuring that the service life of the cable is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the fixing plate of the utility model;

[0016] Figure 3 This is an enlarged schematic diagram of point A of the utility model;

[0017] Figure 4 This is a schematic diagram of the monitoring device of the utility model;

[0018] Figure 5 It is a partial three-dimensional schematic diagram of the utility model.

[0019] In the figure: 1. Bidirectional ammeter; 2. Monitoring hole; 3. Fixed plate; 4. Limit rod; 5. Cable; 6. Bidirectional threaded rod; 7. Adjustment threaded rod; 8. Cable; 9. Monitor; 10. Display screen; 11. Button; 12. Slide; 13. Top plate; 14. Wire threading connector. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] The utility model provides a photovoltaic power station backflow prevention device, including a bidirectional ammeter 1. Figure 1 As shown, the bidirectional ammeter 1 is electrically connected to the monitoring instrument 9 via a cable 8. Figure 4 As shown, a threading connector 14 is fixedly mounted on the bottom of the monitor 9, and the threading connector 14 is fixedly connected to the cable 8. A display screen 10 and a button 11 are mounted on the monitor 9.

[0022] like Figure 1 As shown, a monitoring hole 2 is drilled on the bidirectional ammeter 1, and a cable 5 is connected in the monitoring hole 2. Figure 5 As shown, the housing of the bidirectional ammeter 1 is rotatably connected to a bidirectional threaded rod 6, and the bidirectional threaded rod 6 penetrates the housing of the bidirectional ammeter 1 along the axial direction of the monitoring hole 2. A limit rod 4 is welded and fixed on the housing of the bidirectional ammeter 1, and the limit rod 4 penetrates the housing of the bidirectional ammeter 1 along the axial direction of the monitoring hole 2. The bidirectional threaded rod 6 and the limit rod 4 are symmetrically arranged with respect to the monitoring hole 2.

[0023] like Figure 1 As shown, the two sections of the two-way threaded rod 6 have opposite rotation directions and each thread is connected to a fixed plate 3, which is used to drive the two fixed plates 3 to slide closer or farther. The limit rod 4 runs through the two fixed plates 3, and the two fixed plates 3 and the limit rod 4 are limited and slidably matched to ensure that the two fixed plates 3 slide along the limit rod 4 without rotating with the two-way threaded rod 6. The two-way ammeter 1 is located between the two fixed plates 3, and the two fixed plates 3 are symmetrically arranged about the two-way ammeter 1.

[0024] A circular through hole is drilled in each of the two fixing plates 3, and the through holes on the two fixing plates 3 are coaxial with the monitoring hole 2 on the bidirectional ammeter 1. The cable 5 passes through the through holes of the two fixing plates 3, and the diameter of the through hole is greater than or equal to the diameter of the cable 5. It is ensured that the two fixing plates 3 do not rub the cable 5 when sliding along the cable 5.

[0025] like Figure 2 As shown, the two fixing plates 3 are equipped with abutment components, and the two abutment components are in contact with the cable 5 to limit the position, so as to make the bidirectional ammeter 1 and the cable 5 relatively static. Figure 3As shown, a slide groove 12 is chiseled in each of the two fixed plates 3, each slide groove 12 is connected to the through hole of the fixed plate 3, and the notch is arranged along the radial direction of the connected through hole. A top plate 13 is slidably mounted in each slide groove 12, and each top plate 13 is in contact with the cable 5. An adjusting threaded rod 7 is threadedly connected to each fixed plate 3. Each adjusting threaded rod 7 is arranged along the radial direction of the through hole of the fixed plate 3, and each adjusting threaded rod 7 extends into the slide groove 12 of the fixed plate 3 and is rotatably connected to the top plate 13 in the slide groove 12. It is used to push the top plate 13 to slide along the radial direction of the through hole of the fixed plate 3 to approach or move away from the cable 5.

[0026] Working principle: When in use, the bidirectional ammeter 1 can perform bidirectional detection on the current of the cable 5 through the monitoring hole 2, detect the forward and reverse currents of the cable 5, and transmit the detected circuit data to the display screen 10 of the monitor 9 through the cable 8.

[0027] When the cable 5 needs to be fixed, the adjusting threaded rods 7 on the two fixing plates 3 are rotated manually or driven by a motor, and the two adjusting threaded rods 7 push the connected top plates 13 to move closer to the cable 5. When the two top plates 13 contact and abut against the cable 5, the cable 5 is clamped to ensure the stability of the connection between the cable 5 and the monitoring hole 2 on the bidirectional ammeter 1. At the same time, the two top plates 13 do not completely slide out of the slide grooves 12.

[0028] When the cable 5 needs to be straightened, the bidirectional threaded rod 6 is driven manually or by a motor, and the bidirectional threaded rod 6 pushes the two fixing plates 3 to slide away along the limit rod 4. The two fixing plates 3 pull the cable 5 by driving the internal top plate 13 to make the cable 5 straight.

[0029] When the bidirectional ammeter 1 needs to be moved, the two adjusting threaded rods 7 are rotated in the opposite direction, and the two adjusting threaded rods 7 drive the connected top plate 13 to be out of contact with the cable 5 in the direction away from the cable 5. At this time, the cable 5 is released from clamping. Then the bidirectional ammeter 1 can be moved. During the movement, the top plate 13 does not contact the cable 5, thereby reducing the wear on the surface of the cable 5, protecting the cable 5 from damage, and ensuring the service life of the cable 5.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic power station backflow prevention device, comprising a bidirectional ammeter (1), characterized in that: A bidirectional threaded rod (6) is rotatably arranged on the housing of the bidirectional ammeter (1), and two sections of threads on the bidirectional threaded rod (6) are each threadedly connected to a fixed plate (3); the bidirectional ammeter (1) is located between the two fixed plates (3); a limit rod (4) is fixedly arranged on the housing of the bidirectional ammeter, and the limit rod (4) passes through the two fixed plates (3), and the two fixed plates (3) are both slidably matched with the limit rod (4); a through hole is provided on each of the two fixed plates (3), and a monitoring hole (2) is provided on the bidirectional ammeter (1); a cable (5) is passed through the monitoring hole (2), and the cable (5) passes through the through holes on the two fixed plates (3); abutment components are installed in the two fixed plates (3), and each abutment component is contact-limitedly matched with the cable (5) to make the bidirectional ammeter (1) and the cable (5) relatively stationary.

2. The photovoltaic power station backflow prevention device according to claim 1, characterized in that: The abutment assembly comprises a top plate (13) and an adjusting threaded rod (7); a slide groove (12) is provided in the fixed plate (3), and the slide groove (12) is communicated with a through hole in the fixed plate (3); the top plate (13) is slidably arranged in the slide groove (12) and is contact-type abutted and limitedly matched with the cable (5); the adjusting threaded rod (7) is inserted into the fixed plate (3) and is threadedly connected to the fixed plate (3); the adjusting threaded rod (7) extends into the slide groove (12) of the fixed plate (3) and is rotatably connected to the top plate (13) in the slide groove (12).

3. The photovoltaic power station backflow prevention device according to claim 1, characterized in that: The two sections of threads on the bidirectional threaded rod (6) have opposite rotation directions.

4. The photovoltaic power station backflow prevention device according to claim 3, characterized in that: The bidirectional ammeter (1) is electrically connected to a monitoring instrument (9) via a cable (8).

5. The photovoltaic power station backflow prevention device according to claim 1, characterized in that: The two fixing plates (3) are symmetrically arranged with respect to the bidirectional ammeter (1).

6. The photovoltaic power station backflow prevention device according to claim 2, characterized in that: The through hole on the fixing plate (3) is a circular hole, and the adjusting threaded rod (7) is arranged along the radial direction of the through hole.

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