Photovoltaic transformer integrated with grounding transformer

Abstract

The invention discloses a photovoltaic transformer integrated with a grounding transformer, and relates to the technical field of transformers, the photovoltaic transformer comprises an outer protection box body, a grounding partition plate is installed in the outer protection box body, an installation space is arranged above the grounding partition plate, and the installation space facilitates installation of related working devices of the photovoltaic transformer; under the cooperation of a cable maintenance assembly and a winding assembly, a sliding supporting rod drives a reversing stress rod frame to perform sliding adjustment in a moving groove under the action of three groups of adjusting rods, so that the sliding supporting rod is matched with a return spring to enable the reversing stress rod frame to perform expansion adjustment at an angle of degree; and furthermore, the single cable placed on the cable rack and the elastic cable clamping tool can be displayed in front of a worker in a suspended manner, so that the worker can maintain and replace the damaged cable more quickly, automatic operation is formed during overall maintenance, problems generated by the cable can be displayed more accurately, and the maintenance time of the worker is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to a photovoltaic transformer with an integrated grounding transformer. Background Art

[0002] Photovoltaic transformer is a key component in photovoltaic system. It not only isolates DC and AC, but also protects solar cells. Transformer is the main component of various power supplies and electrical equipment.

[0003] In the prior art, the Chinese application number: 202121460049.7 in "A power transformer with an integrated grounding transformer" includes a grounding transformer and an arc suppression coil; the grounding transformer is connected to the low-voltage side of the power transformer to form a neutral point, the neutral point of the grounding transformer is connected to the arc suppression coil, and the arc suppression coil is grounded. Preferably, it also includes a mounting bracket, the mounting bracket is fixed on the side wall of the power transformer, and the grounding transformer is arranged on the mounting bracket. By connecting the grounding transformer to the power transformer on the low-voltage side, a neutral point is artificially established so that the arc suppression coil can be connected at the neutral point to reduce the grounding short-circuit breaking current, so that the grounding protection can be reliably operated and the power supply reliability of the system can be improved; at the same time, installing the grounding transformer on the power transformer can save the floor space of the grounding transformer, save the connection from the power transformer to the grounding transformer, save installation time, save substation space, and reduce investment

[0004] However, in the prior art, during the use of a photovoltaic transformer with an integrated grounding transformer, the integrated grounding transformer needs to simultaneously perform the functions of a transformer and a grounding transformer, so its internal structure and working principle are relatively complex. As for the placement of the grounding cable, when the outer sheath of the grounding cable is damaged, it is impossible to clearly know the placement of the grounding cable, and the use of the cable can only be known during regular inspections and maintenance. If the maintenance personnel find it troublesome and do not conduct a comprehensive inspection of the grounding cable, it is easy to cause a short circuit in the grounding cable during subsequent use, forming a fire source. In the absence of timely rescue operations, it is easy to cause damage to the overall transformer equipment and cause economic losses. Therefore, it is necessary to propose a photovoltaic transformer with an integrated grounding transformer. Summary of the invention

[0005] The purpose of the present invention is to provide a photovoltaic transformer with an integrated grounding transformer to solve the problem proposed in the above background technology that during the use of the photovoltaic transformer with an integrated grounding transformer, when the outer sheath of the grounding cable is damaged, it cannot be clearly known, and the use of the cable can only be known during regular inspection and maintenance. If the maintenance personnel find it troublesome and do not conduct a comprehensive inspection of the grounding cable, it is easy to cause a short circuit in the grounding cable during subsequent use, forming a fire source. In the absence of timely rescue operations, it is easy to cause damage to the entire transformer equipment and cause economic losses.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a photovoltaic transformer with an integrated grounding transformer, comprising an outer protective box, a grounding partition is installed inside the outer protective box, an installation space is provided above the grounding partition, and the installation space is convenient for installing relevant working devices of the photovoltaic transformer, a grounding cable chamber is provided below the grounding partition, cable maintenance components are symmetrically installed at the left and right ends of the grounding cable chamber, a winding component is provided on the side of the cable maintenance component, and a wear detection sensor group is installed at the bottom of the grounding cable chamber;

[0007] The cable repair component includes a DC motor, a driving gear is connected to the bottom output end of the DC motor, a toothed belt is meshed on the outer tooth angle end of the peripheral side of the driving gear, and a driven gear is meshed on the other end of the toothed belt. The bottom ends of the driving gear and the driven gear are connected to a side frame through a connecting shaft, a screw rod is connected to the bottom of the driving gear by a connecting shaft, and an upper limit piece and a lower limit piece are respectively opposedly sleeved and fastened at the upper and lower ends of the screw rod, and three sets of gear boxes are equally threaded on the outside of the screw rod, and the sides of the three sets of gear boxes are tightly A T-shaped connecting slide bar is fixedly connected, and a load-bearing mounting rail seat is arranged on the side of the T-shaped connecting slide bar. A limiting slide groove is provided on the inner wall surface of the load-bearing mounting rail seat. The limiting slide groove and the T-shaped connecting slide bar are slidably connected, and the opening distance of the limiting slide groove is an equal distance of three groups of gear boxes. The side of the load-bearing mounting rail seat and the inner wall surface of the outer protective box body are fastened together, and the other side of the gear box is fastened together with a cable rack, and an elastic cable clamp is installed on the bottom wall surface of the cable rack, and the side ends of the elastic cable clamp are electrically connected to the line and the ground resistance tester through the line.

[0008] Preferably, a mounting base is installed on the side of the load-bearing mounting rail seat, and a plurality of groups of optical fiber refractive index sensors are installed on the surface of the mounting base, and a transverse groove is provided on the other side surface of the mounting base, and a return spring is installed inside the transverse groove, and one end of the return spring is fastened to a sliding support rod, and a return force rod frame is provided on the side end of the sliding support rod, and three groups of adjusting rods are equally installed on the outer part of the rod body surface of the return force rod frame, and the side ends of the three groups of adjusting rods are connected to the cable rack, and the side wall of the cable rack is provided with a movable groove, and the side ends of the three groups of adjusting rods are slidably connected to the movable groove.

[0009] Preferably, the winding assembly includes an angle adjusting motor, the output end of the angle adjusting motor is connected to a rotating threaded shaft, an angle sensor is installed on the side of the rotating threaded shaft, the other side outer wall of the rotating threaded shaft is fastened to a load-bearing frame, the side of the load-bearing frame is fastened to a line connecting frame, the bottom of the line connecting frame is fastened to a winding tool, and a wire groove is opened on the side surface of the winding tool.

[0010] Preferably, a directional telescopic rod is fastened to the top side of the load-bearing frame, a rotation damping shaft sleeve is provided at the side end of the directional telescopic rod, a rotation shaft column is provided inside the rotation damping shaft sleeve, and the rotation shaft column is provided below the grounding partition.

[0011] Preferably, a line channel is provided through the central surface of the grounding partition, and a dust removal box is installed on the top of the outer protective box body, and the dust removal box is composed of a dust removal fan and a dust removal filter.

[0012] Preferably, a double groove is provided on the side of the cabinet door of the outer protective box body, and a double-opening self-locking rail door is arranged inside the double groove. A Hall motion sensor control group is installed on the side of the outer protective box body, and the Hall motion sensor control group consists of a Hall sensor, a motion displacement sensor, a transmission rod and a microprocessor.

[0013] Preferably, a reactor is provided at the bottom of the outer protection box body, and grounding arc suppression coils are symmetrically installed on the left and right sides of the bottom of the outer protection box body.

[0014] Preferably, a lightning protection frame rail is installed at the bottom of the outer protection box body, and heat dissipation fans are provided at both ends of the side of the outer protection box body.

[0015] Preferably, a heat dissipation fence end is provided on the back surface of the outer protective box body, and fixed installation points are installed on the surface of the outer protective box body.

[0016] Preferably, both ends of the side of the outer protective box are connected to emergency fire extinguishing gas cylinders, and the switch control valve of the emergency fire extinguishing gas cylinder is electrically connected to a smoke sensor provided on the top wall surface inside the outer protective box.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, when the double-open self-locking rail door is opened, the displacement signal generated is transmitted to the microprocessor in the Hall motion sensor control group in cooperation with the Hall sensor and the motion displacement sensor for analysis, identification and judgment, and new control instructions are respectively transmitted to the DC motor and the angle adjustment motor, so that when the coreless optical fiber in the multiple groups of optical fiber refractive index sensors changes the refractive index of the outer peripheral medium of the cable by refraction of the outer surface of the optical fiber, the DC motor is started, and the driving gear, the toothed belt and the driven gear are driven to rotate in turn, so that the wire The rod drives the three sets of gear boxes and the cable rack to adjust upward from the bottom of the limit slide slot simultaneously, and the load-bearing capacity of the cable rack is guaranteed with the cooperation of the T-shaped connecting slide rod, the load-bearing mounting rail seat and the limit slide slot. Then the sliding support rod drives the return force rod rack to slide and adjust inside the moving slot under the action of the three sets of adjustment rods, so that the sliding support rod cooperates with the return spring to make the return force rod rack expand and adjust at a 45° angle, which further facilitates the single cable placed on the cable rack and the elastic cable clamp to be suspended in the air and displayed in front of the staff, so that the staff can repair and replace the damaged cable faster.

[0019] 2. In the present invention, by cooperating with the winding assembly, when the double-open self-locking rail door is opened, the angle adjustment motor is started to drive the rotating threaded shaft to rotate, and the signal processing analysis and judgment of the angle sensor, multiple groups of optical fiber refractive index sensors and Hall action sensor control group are used to facilitate the control and adjustment of the rotation angle of the rotating threaded shaft, so that the rotating threaded shaft drives the load-bearing frame, line connection frame, winding tool and wire trough to rotate the angle, and synchronously drives the winding tool and the wire trough to adjust the angle of the cables installed and wound in a classified manner. When the threaded shaft rod rotates, it drives the directional telescopic rod to perform directional telescopic operations, and cooperates with the above-mentioned angle and azimuth adjustment to drive the line to perform up and down angle adjustments along the spatial X-axis. In addition, with the cooperation of the rotating damping shaft sleeve and the rotating shaft column, the rotating threaded shaft rod is convenient for rotating, and the rotating damping shaft sleeve is synchronously rotated at an angle outside the rotating shaft column during the rotation operation, so that the overall structure forms an automatic adjustment structure, and the overall rotation angle is limited by the bottom wall of the grounding partition and the back side of the outer protective box body, so that the rotation angle is less than a right angle, which is convenient for adjusting the cables placed on the winding tool and the cable trough.

[0020] 3. In the present invention, by cooperating with the Hall action sensor control group, DC motor, optical fiber refractive index sensor, angle adjustment motor, grounding arc suppression coil, grounding resistance tester, wear detection sensor group and angle sensor, the overall operation is automated during maintenance, and the problems caused by the cables can be displayed more accurately, reducing the maintenance time of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the main view of a photovoltaic transformer with an integrated grounding transformer according to the present invention;

[0022] Figure 2 It is a schematic structural diagram of a photovoltaic transformer with an integrated grounding transformer according to the present invention;

[0023] Figure 3 It is a schematic structural diagram of the back side of a photovoltaic transformer with an integrated grounding transformer according to the present invention;

[0024] Figure 4 It is a schematic diagram of the installation position structure of a cable maintenance component and a winding component in a photovoltaic transformer with an integrated grounding transformer according to the present invention;

[0025] Figure 5 It is a schematic structural diagram of an internal cross-section of a photovoltaic transformer with an integrated grounding transformer according to the present invention;

[0026] Figure 6 It is a structural schematic diagram of a winding assembly in a photovoltaic transformer with an integrated grounding transformer according to the present invention;

[0027] Figure 7 It is a structural schematic diagram of a cable maintenance assembly in a photovoltaic transformer with an integrated grounding transformer according to the present invention;

[0028] Figure 8 It is a schematic diagram of the separation structure of a cable maintenance component in a photovoltaic transformer with an integrated grounding transformer according to the present invention;

[0029] Fig. 9 It is a schematic diagram of the side separation structure of a cable maintenance assembly in a photovoltaic transformer with an integrated grounding transformer according to the present invention.

[0030] In the figure: 1. outer protective box; 2. dust removal box; 3. emergency fire extinguisher; 4. double slot; 5. double self-locking rail door; 6. installation space; 7. grounding partition; 8. line channel; 9. cooling fan; 10. reactor; 11. lightning protection frame rail; 12. Hall action sensor control group; 13. cable maintenance assembly; 131. DC motor; 132. driving gear; 133. toothed belt; 134. driven gear; 135. side frame; 136. lead screw; 137. upper limit piece; 138. gear box; 139. lower limit piece; 1390. T-type connecting slide bar; 1391. limit slide groove; 1392. load-bearing mounting rail seat; 1393 , optical fiber refractive index sensor; 1394, mounting base; 1395, horizontal groove; 1396, return spring; 1397, sliding support rod; 1398, return force rod frame; 1399, adjusting rod; 1310, moving groove; 1311, cable rack; 1312, elastic cable clamp; 14, grounding arc suppression coil; 15, winding assembly; 151, adjusting angle motor; 152, rotating threaded shaft; 153, angle sensor; 154, load-bearing frame; 155, line connection frame; 156, winding tool; 157, wire trough; 158, directional telescopic rod; 159, rotating damping shaft sleeve; 16, heat dissipation fence end; 17, fixed installation point. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Reference Figure 1-Figure 9As shown: a photovoltaic transformer with an integrated grounding transformer, comprising an outer protective box body 1, a grounding partition 7 is arranged inside the outer protective box body 1, an installation space 6 is arranged above the grounding partition 7, the installation space 6 is convenient for installing relevant working devices of the photovoltaic transformer, a grounding cable room is arranged below the grounding partition 7, cable inspection components 13 are symmetrically installed at the left and right ends of the grounding cable room, a winding component 15 is arranged on the side of the cable inspection component 13, and a wear detection sensor group is installed at the bottom of the grounding cable room; the cable inspection component 13 comprises a DC motor 131, a driving gear 132 is connected to the bottom output end of the DC motor 131, a tooth belt 133 is meshedly connected to the outer tooth angle end of the peripheral side of the driving gear 132, and a driven gear 134 is meshedly connected to the other end of the tooth belt 133, the bottom ends of the driving gear 132 and the driven gear 134 are connected to the side frame 135 through a connecting shaft, and the bottom of the driving gear 132 is connected to the side frame 135 by the connecting shaft. A screw rod 136 is provided, and an upper limit piece 137 and a lower limit piece 139 are respectively opposed and fastened at the upper and lower ends of the screw rod 136. The outer part of the screw rod 136 is equally threaded with three sets of gear boxes 138. The sides of the three sets of gear boxes 138 are all fastened with T-shaped connecting slide bars 1390. The side of the T-shaped connecting slide bar 1390 is provided with a bearing mounting rail seat 1392. The inner wall surface of the bearing mounting rail seat 1392 is provided with a limit slide groove 1391. The limit slide groove 1391 is provided with a limit slide groove 1392. 91 is slidably connected to the T-shaped connecting slide bar 1390, and the opening distance of the limiting slide groove 1391 is equally divided by the distance of the three groups of gear boxes 138. The side of the supporting mounting rail seat 1392 is fastened to the inner wall surface of the outer protective box body 1, and the other side of the gear box 138 is fastened to the cable rack 1311. The bottom wall surface of the cable rack 1311 is installed with an elastic cable clamp 1312, and the side ends of the elastic cable clamp 1312 are electrically connected through the line and the ground resistance tester.

[0033] according to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 Fig. 9As shown, a mounting base 1394 is installed on the side of the supporting mounting rail seat 1392, and a plurality of groups of optical fiber refractive index sensors 1393 are installed on the surface of the mounting base 1394. A transverse groove 1395 is provided on the other side surface of the mounting base 1394, and a return spring 1396 is installed inside the transverse groove 1395. One end of the return spring 1396 is fastened to a sliding support rod 1397, and a return force rod frame 1398 is provided on the side end of the sliding support rod 1397. Three groups of adjusting rods 1399 are equally installed on the outside of the rod body surface of the return force rod frame 1398. The side ends of the three groups of adjusting rods 1399 are connected to the cable rack 1311. The side wall surface of the cable rack 1311 is provided with a moving groove 1310. The groove 1310 is slidably connected, and multiple groups of optical fiber refractive index sensors 1393 are installed on the surface of the mounting base 1394. When the coreless optical fiber in the multiple groups of optical fiber refractive index sensors 1393 uses the refraction of the outer surface of the optical fiber to change the refractive index of the external peripheral medium of the cable, the detection signal will be transmitted to the DC motor 131, which is convenient for transmission operation. The sliding support rod 1397 is used to drive the return force rod frame 1398 to slide and adjust inside the movable groove 1310 under the action of three groups of adjustment rods 1399, so that when the staff opens the double-opening self-locking rail door 5, the return force rod frame 1398 is synchronously expanded under the transmission action of the above-mentioned DC motor 131, and cooperates with the return spring 1396 to make the sliding support rod 1397 move and adjust.

[0034] according to Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the winding assembly 15 includes an angle adjustment motor 151, the output end of the angle adjustment motor 151 is connected to a rotating threaded shaft 152, the side of the rotating threaded shaft 152 is installed with an angle sensor 153, the other side outer wall of the rotating threaded shaft 152 is fastened to a load-bearing frame 154, the side of the load-bearing frame 154 is fastened to a line frame 155, the bottom of the line frame 155 is fastened to a winding tool 156, and the side surface of the winding tool 156 is provided with a wire groove 157. When the staff opens the double-opening self-locking rail door 5, the angle adjustment motor 151 is started to drive the rotating threaded shaft 152 to rotate, and the angle sensor 153 is used to adjust the angle of rotation of the rotating threaded shaft 152. With the cooperation of the signal processing, analysis and judgment of the sensor 153, multiple groups of optical fiber refractive index sensors 1393 and the Hall motion sensor control group 12, it is convenient to control and adjust the rotation angle of the rotating threaded shaft 152, so that the rotating threaded shaft 152 drives the load-bearing frame 154, the line frame 155, the winding tool 156 and the cable trough 157 to rotate the angle, and simultaneously drives the cables that are classified, installed and wound on the winding tool 156 and the cable trough 157 to adjust the angle and orientation. With the cooperation of the line frame 155, the winding tool 156 and the cable trough 157, it is convenient to place the cable in the air in a single horizontal S-shaped winding manner when the cable is initially installed.

[0035] according to Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the top side of the load-bearing frame 154 is fastened with a directional telescopic rod 158, and the side end of the directional telescopic rod 158 is provided with a rotating damping shaft sleeve 159. The interior of the rotating damping shaft sleeve 159 is provided with a rotating shaft column, and the rotating shaft column is arranged below the grounding partition 7. When the rotating threaded shaft 152 is rotated, it drives the directional telescopic rod 158 to perform directional telescopic operation, and cooperates with the above-mentioned angle and azimuth adjustment to drive the line to perform up and down angle adjustment along the spatial X-axis. In addition, with the cooperation of the rotating damping shaft sleeve 159 and the rotating shaft column, it is convenient for the rotating threaded shaft 152 to rotate during the rotation operation, and synchronously makes the rotating damping shaft sleeve 159 rotate at an angle outside the rotating shaft column, so that the overall structure forms an automatic adjustment structure, and the overall rotation angle is limited by the bottom wall of the grounding partition 7 and the back side of the outer protective box body 1, so that the rotation angle is less than a right angle.

[0036] according to Figure 1-Figure 5As shown, a line channel 8 is provided on the central surface of the grounding partition 7, and a dust removal box 2 is installed on the top of the outer protective box body 1. The dust removal box 2 is composed of a dust removal fan and a dust removal filter. The line channel 8 is used to facilitate the grounding cable to pass through and place it inside the grounding cable room. Under the cable arrangement and classification of the staff, the cable is installed and placed. Under the action of the dust removal box 2, the dust removal fan is used to suction the dust accumulation inside the outer protective box body 1 upward, and the dust removal filter is used to reduce the entry of external dust.

[0037] according to Figure 1 As shown, a double slot 4 is provided on the side of the cabinet door of the outer protection box body 1, and a double self-locking rail door 5 is arranged inside the double slot 4. A Hall motion sensor control group 12 is installed on the side of the outer protection box body 1. The Hall motion sensor control group 12 is composed of a Hall sensor, a motion displacement sensor, a transmission rod and a microprocessor. With the cooperation of the double slot 4 and the double self-locking rail door 5, the staff can open the double self-locking rail door 5 during the later maintenance and care operations, and expand it outward under the action of the double slot 4. When the double self-locking rail door 5 is expanded, the displacement signal generated is transmitted to the microprocessor in the Hall motion sensor control group 12 in cooperation with the Hall sensor and the motion displacement sensor for analysis, identification and judgment, and new control instructions are respectively transmitted to the DC motor 131 and the angle adjustment motor 151, so that the DC motor 131 and the angle adjustment motor 151 can perform self-starting operations.

[0038] according to Figure 1 , Figure 2 and Figure 5 As shown, a reactor 10 is provided at the bottom of the outer protection box 1, and grounding arc suppression coils 14 are symmetrically installed on the left and right sides of the bottom of the outer protection box 1. Under the action of the reactor 10 and the grounding arc suppression coil 14, it is convenient to limit the current, stabilize the voltage and compensate for the reactive power of the installed grounding cable, and the grounding arc suppression coil 14 is installed at the neutral point of the overall device, so that when a grounding fault occurs in the overall device, the grounding arc suppression coil 14 can limit the fault current and extinguish the arc, thereby protecting the system equipment and personnel safety.

[0039] according to Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a lightning protection frame rail 11 is installed at the bottom of the outer protective box 1, and heat dissipation fans 9 are arranged at both ends of the side of the outer protective box 1. The lightning protection frame rail 11 is used to facilitate the installation of the whole, and the lightning protection frame rail 11 provides lightning protection for the outer protective box 1, so as to prevent the overall device from being damaged by lightning when the overall device is installed outdoors.

[0040] according to Figure 3As shown, a heat dissipation fence end 16 is provided on the back surface of the outer protective box body 1, and a fixed installation point 17 is installed on the surface of the outer protective box body 1. Under the action of the heat dissipation fence end 16, the overall heat dissipation operation is convenient, and with the cooperation of the fixed installation point 17, the deflection angle motor 151 is convenient to adjust and install.

[0041] according to Figure 1 and Figure 3 As shown, both ends of the side of the outer protective box body 1 are connected to an emergency fire extinguishing gas cylinder 3, and a smoke sensor is provided on the switch control valve of the emergency fire extinguishing gas cylinder 3 and the inner top wall surface of the outer protective box body 1 to be electrically connected. By utilizing the switch control valve of the emergency fire extinguishing gas cylinder 3 and the inner top wall surface of the outer protective box body 1 to be electrically connected, when a fire source is generated inside the overall device, the smoke sensor detects smoke particles, so that the switch control valve of the emergency fire extinguishing gas cylinder 3 is started, so that the fire extinguishing gas inside the emergency fire extinguishing gas cylinder 3 can extinguish the fire inside the overall device.

[0042] The wiring diagram of the dust removal box 2, emergency fire extinguishing gas cylinder 3, reactor 10, Hall action sensor control group 12, DC motor 131, optical fiber refractive index sensor 1393, angle adjustment motor 151, grounding arc suppression coil 14, grounding resistance tester, wear detection sensor group and angle sensor 153 in the present invention is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use. Therefore, the control method and wiring layout of the dust removal box 2, emergency fire extinguishing gas cylinder 3, reactor 10, Hall action sensor control group 12, DC motor 131, optical fiber refractive index sensor 1393, angle adjustment motor 151, grounding arc suppression coil 14, grounding resistance tester, wear detection sensor group and angle sensor 153 are no longer explained in detail.

[0043] The use method and working principle of the device: First, when the line is initially arranged, the staff can place the grounding cable inside the grounding cable room through the line channel 8. Under the arrangement and classification of the staff, the cable is suspended in the air in a single horizontal S-shaped winding manner on the line connection frame 155, the winding tool 156, the cable trough 157, the cable rack 1311 and the elastic cable clamp 1312. After that, when the cable is detected to be broken, worn, cracked and grounded unstably on the outer sheath of the placed cable in cooperation with the ground resistance tester, multiple groups of optical fiber refractive index sensors 1393 and the wear detection sensor group, the detected data will be converted into information through the microprocessor and sent to the intelligent terminal and remote control terminal of the maintenance staff. When the maintenance staff is performing maintenance, the whole is powered on to close, and after the double-open self-locking rail door 5 is opened, it is expanded outward under the action of the double slots 4, and when the double-open self-locking rail door 5 is expanded, the displacement signal generated is transmitted to the microprocessor in the Hall motion sensor control group 12 under the cooperation of the Hall sensor and the motion displacement sensor for analysis, identification and judgment, and new control instructions are respectively transmitted to the DC motor 131 and the deflection angle adjustment motor 151, so that the DC motor 131 and the deflection angle adjustment motor 151 are self-starting, so that the deflection angle adjustment motor 151 is started, driving the rotating threaded shaft 152 to rotate, and using the angle sensor 153, multiple groups of optical fiber refractive index sensors 1393 and Hall motion sensors With the cooperation of the signal processing, analysis and judgment of the control group 12, it is convenient to control and adjust the rotation angle of the rotating threaded shaft 152, so that the rotating threaded shaft 152 drives the load-bearing frame 154, the line frame 155, the winding tool 156 and the wire groove 157 to rotate the angle, and synchronously drives the cables that are classified, installed and wound on the winding tool 156 and the wire groove 157 to adjust the angle and orientation. When the rotating threaded shaft 152 rotates, it drives the directional telescopic rod 158 to perform directional telescopic operation, and cooperates with the above-mentioned angle and orientation adjustment to drive the line to adjust the up and down angle and orientation along the spatial X-axis. In addition, with the cooperation of the rotating damping shaft sleeve 159 and the rotating shaft column, it is convenient for the rotating threaded shaft 152 to synchronously make the rotating damping shaft 158 ​​rotate during the rotation operation. The shaft sleeve 159 is rotated at an angle outside the rotating shaft column, so that the overall structure forms an automatic adjustment structure, and the overall rotation angle is limited by the bottom wall of the grounding partition 7 and the back side of the outer protective box body 1, so that the rotation angle is less than a right angle, which is convenient for adjusting the cables placed on the winding device 156 and the wire groove 157. At the same time, when the coreless optical fiber in the multiple groups of optical fiber refractive index sensors 1393 uses the refraction of the outer surface of the optical fiber to change the refractive index of the external peripheral medium of the cable, the DC motor 131 is started, and the driving gear 132, the toothed belt 133 and the driven gear 134 are rotated in turn, so that the screw rod 136 drives the three groups of gear boxes 138 and the cable rack 1311 to adjust upward from the bottom end of the limiting slide groove 1391 synchronously.Synchronously, with the cooperation of the T-shaped connecting slide bar 1390, the load-bearing mounting rail seat 1392 and the limiting slide groove 1391, the load-bearing capacity of the cable rack 1311 is guaranteed. Then, the sliding support rod 1397 drives the return force rod rack 1398 to slide and adjust inside the movable groove 1310 through the action of the three sets of adjustment rods 1399, so that the sliding support rod 1397 cooperates with the return spring 1396 to make the return force rod rack 1398 expand and adjust at a 45° angle, so that the single cable placed on the cable rack 1311 and the elastic cable clamp 1312 can be suspended in the air and displayed in front of the staff, so as to facilitate faster repair and replacement of the damaged cable, and then the grounding arc suppression coil 14 is installed on the neutral point of the overall device. , so that when a ground fault occurs in the overall device, the grounding arc suppression coil 14 can limit the fault current and extinguish the arc, protecting the system equipment and personnel safety. After that, the switch control valve of the emergency fire extinguishing gas cylinder 3 and the smoke sensor on the top wall surface of the outer protective box 1 are electrically connected, so that when a fire source is generated inside the overall device, the smoke particles detected by the smoke sensor can start the switch control valve of the emergency fire extinguishing gas cylinder 3, so that the fire extinguishing gas inside the emergency fire extinguishing gas cylinder 3 can extinguish the fire inside the overall device. When the maintenance is completed and the double-opening self-locking rail door 5 is closed, the above structure will be stored through the opposite operation to stabilize the cable and ensure that the subsequent cables will not be dragged due to their own weight, affecting the grounding effect. ,

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to 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 transformer with an integrated grounding transformer, characterized in that: The invention comprises an outer protective box (1), wherein a grounding partition (7) is arranged inside the outer protective box (1), an installation space (6) is arranged above the grounding partition (7), and the installation space (6) is convenient for installing relevant working devices of the photovoltaic transformer, a grounding cable chamber is arranged below the grounding partition (7), and cable inspection components (13) are symmetrically arranged at the left and right ends of the grounding cable chamber, a winding component (15) is arranged on the side of the cable inspection component (13), and a wear detection sensor group is installed at the bottom of the grounding cable chamber; The cable repair component (13) comprises a DC motor (131), the bottom output end of the DC motor (131) is connected to a driving gear (132), the peripheral external tooth angle end of the driving gear (132) is meshedly connected to a toothed belt (133), the other internal end of the toothed belt (133) is meshedly connected to a driven gear (134), the bottom ends of the driving gear (132) and the driven gear (134) are both connected to a side frame (135) via a connecting shaft, the bottom of the driving gear (132) is connected to a screw rod (136) via a connecting shaft, the upper and lower ends of the screw rod (136) are respectively opposedly sleeved with an upper limit piece (137) and a lower limit piece (139), the outer part of the screw rod (136) is equally threadedly connected to three sets of gear boxes (138), the sides of the three sets of gear boxes (138) are connected to the side frames (135) via a connecting shaft, They are all fastened with a T-shaped connecting slide bar (1390), and a load-bearing mounting rail seat (1392) is arranged on the side of the T-shaped connecting slide bar (1390). A limiting slide groove (1391) is provided on the inner wall surface of the load-bearing mounting rail seat (1392). The limiting slide groove (1391) and the T-shaped connecting slide bar (1390) are slidably connected, and the opening distance of the limiting slide groove (1391) is equal to the distance of three sets of gear boxes (138). The side of the load-bearing mounting rail seat (1392) is fastened with the inner wall surface of the outer protective box body (1), and the other side of the gear box (138) is fastened with a cable rack (1311), and an elastic cable clamp (1312) is installed on the bottom wall surface of the cable rack (1311), and the side ends of the elastic cable clamp (1312) are electrically connected through the line and the ground resistance tester.

2. The photovoltaic transformer with integrated grounding transformer according to claim 1, characterized in that: The side of the bearing mounting rail seat (1392) is provided with a mounting base (1394), and a plurality of groups of optical fiber refractive index sensors (1393) are mounted on the surface of the mounting base (1394). The other side surface of the mounting base (1394) is provided with a transverse groove (1395), and a return spring (1396) is installed inside the transverse groove (1395), and one end of the return spring (1396) is fastened to a sliding support rod (1397). ), a reversing force-bearing rod frame (1398) is provided at the side end of the sliding support rod (1397), three groups of adjusting rods (1399) are equally installed on the outside of the rod body surface of the reversing force-bearing rod frame (1398), the side ends of the three groups of adjusting rods (1399) are connected to the cable rack (1311), and a movable groove (1310) is provided on the side wall surface of the cable rack (1311), and the side ends of the three groups of adjusting rods (1399) are slidably connected to the movable groove (1310).

3. The photovoltaic transformer with integrated grounding transformer according to claim 1, characterized in that: The winding assembly (15) comprises an angle adjustment motor (151), the output end of the angle adjustment motor (151) is connected to a rotating threaded shaft (152), an angle sensor (153) is installed on the side of the rotating threaded shaft (152), a load-bearing frame (154) is fastened to the outer wall of the other side of the rotating threaded shaft (152), a line connecting frame (155) is fastened to the side of the load-bearing frame (154), a winding tool (156) is fastened to the bottom of the line connecting frame (155), and a wire groove (157) is provided on the side surface of the winding tool (156).

4. The photovoltaic transformer with integrated grounding transformer according to claim 3, characterized in that: The top side of the load-bearing frame (154) is fastened with a directional telescopic rod (158), the side end of the directional telescopic rod (158) is provided with a rotation damping shaft sleeve (159), the interior of the rotation damping shaft sleeve (159) is provided with a rotation shaft column, and the rotation shaft column is arranged below the grounding partition (7).

5. The photovoltaic transformer with integrated grounding transformer according to claim 1, characterized in that: A line channel (8) is provided through the central surface of the grounding partition (7), and a dust removal box (2) is installed on the top of the outer protective box body (1), and the dust removal box (2) is composed of a dust removal fan and a dust removal filter.

6. The photovoltaic transformer with integrated grounding transformer according to claim 1, characterized in that: The cabinet door side of the outer protection box (1) is provided with a double slot (4), and a double-opening self-locking rail door (5) is arranged inside the double slot (4). A Hall action sensor control group (12) is installed on the side of the outer protection box (1), and the Hall action sensor control group (12) is composed of a Hall sensor, a motion displacement sensor, a transmission rod and a microprocessor.

7. The photovoltaic transformer with integrated grounding transformer according to claim 1, characterized in that: A reactor (10) is arranged at the bottom of the outer protection box (1), and grounding arc suppression coils (14) are symmetrically installed on the left and right sides of the bottom of the outer protection box (1).

8. The photovoltaic transformer with integrated grounding transformer according to claim 1, characterized in that: A lightning protection frame rail (11) is installed at the bottom of the outer protection box body (1), and heat dissipation fans (9) are provided at both ends of the side of the outer protection box body (1).

9. The photovoltaic transformer with integrated grounding transformer according to claim 1, characterized in that: A heat dissipation fence end (16) is provided on the back surface of the outer protection box body (1), and a fixed installation point (17) is installed on the surface of the outer protection box body (1).

10. The photovoltaic transformer with integrated grounding transformer according to claim 1, characterized in that: Both ends of the side of the outer protective box (1) are connected to emergency fire extinguishing gas cylinders (3), and the switch control valve of the emergency fire extinguishing gas cylinder (3) is electrically connected to a smoke sensor provided on the top wall surface of the outer protective box (1).

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