Photovoltaic box-type transformer with temperature monitoring function

Abstract

The utility model discloses a photovoltaic box-type transformer with a temperature monitoring function. The photovoltaic box-type transformer comprises a box body, a transformer body, an external shell, an inner cavity, a circuit board, a temperature sensor, a pressing and fixing component, a control panel, a power supply, a main control board, a display screen, a window, a first plugging terminal, a first plugging seat and a first via hole. The utility model has the following advantages and effects: the process of replacing the temperature sensor is very convenient, the mode of fixing the temperature sensor by using a bolt in the traditional structure is improved, and the operation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic box transformers, and particularly to a photovoltaic box transformer with a temperature monitoring function. Background Art

[0002] With the rapid development of photovoltaic power generation technology, as an important device connecting photovoltaic power stations and power grids, the performance and safety of photovoltaic box transformers have become increasingly important. Photovoltaic box transformers not only need to carry out the conversion function of high-voltage current, but also need to maintain long-term stable operation under various harsh environmental conditions. However, during long-term operation, the temperature of the equipment is likely to change. Especially in the case of overloading or poor heat dissipation, it may cause the equipment to overheat, and even lead to failures or safety accidents. Therefore, timely and accurate monitoring of the temperature inside the box has become an important measure to ensure the safe operation of photovoltaic box transformers.

[0003] Existing photovoltaic box transformers usually adopt simple temperature monitoring devices, or only alarm through the protection mechanism when the switch temperature is too high. However, most of these traditional temperature monitoring devices are temperature sensors concentrated inside the box. For example, in a new energy photovoltaic box transformer cooling device disclosed in a Chinese patent with the application number CN202410783068.5, the temperature sensor is arranged inside the cabinet. This assembly has the defect of complex installation and maintenance. Especially when it is necessary to check or replace the temperature sensor, it is often necessary to disassemble the transformer shell, which increases the difficulty and workload of maintenance. Moreover, this kind of structure usually relies on bolts for fixed installation. When it is necessary to check, maintain or replace the temperature sensor, it is necessary to use tools to disassemble multiple bolts. This is not only cumbersome to operate, but also may face high operation difficulty in some scenarios with limited installation space, affecting the maintenance efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a photovoltaic box transformer with a temperature monitoring function to solve the problems raised in the background art.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions:

[0006] A photovoltaic box-type transformer with temperature monitoring function includes a box body. A transformer body is disposed inside the box body. An external housing is fixedly arranged on the right side of the box body. The external housing has an inner cavity. A circuit board is detachably inserted into the inner cavity. A temperature sensor is welded on the front surface of the circuit board. A pressing member is arranged in the inner cavity. After the circuit board is vertically inserted laterally into the inner cavity, it can be positioned in cooperation with the pressing member. After the circuit board is positioned in cooperation with the pressing member, it can be pressed by the pressing member. After the circuit board is pressed by the pressing member, the temperature sensor will be in contact with the side wall of the box body, and the temperature inside the box body is monitored based on contact heat conduction.

[0007] A control panel is fixedly arranged on the front surface of the box body. A power supply, a main control board powered by the power supply, and a display screen are arranged inside the control panel. A single-chip microcomputer is configured on the main control board. An opening for the display screen to be exposed is opened on the front surface of the control panel. A first plug terminal is welded on the circuit board. A first socket is welded on the main control board. The first plug terminal can extend out of the external housing to form an insertion fit with the first socket, so that the temperature sensor is electrically connected to the single-chip microcomputer. A first through hole for the first plug terminal to extend out is opened at the bottom of the external housing.

[0008] A further setting is that a plurality of positioning columns having the same height as the temperature sensor are welded on the front surface of the circuit board.

[0009] A further setting is that the pressing member includes a support plate and a movable pressing plate. The support plate is fixed on the right inner wall of the inner cavity. A plurality of stroke sleeve rods are regularly arranged on the top of the support plate. A stroke inner groove is opened inside each stroke sleeve rod. A plurality of stroke insertion rods that can be respectively inserted into the inside of each stroke sleeve rod are regularly arranged on the bottom of the movable pressing plate. Each stroke insertion rod is movably matched with the corresponding stroke sleeve rod.

[0010] Two positioning grooves are opened on the top of the movable pressing plate. Two positioning protrusions are fixedly arranged on the back surface of the circuit board. After the circuit board is vertically inserted laterally into the inner cavity, the two positioning protrusions can respectively dampingly extend into the two positioning grooves, so that the circuit board is positioned in cooperation with the pressing member.

[0011] A further setting is that two parallel tracks are fixedly arranged on the top of the support plate. Two sliders that can slide along the corresponding tracks are embedded on each track. The tops of the two sliders are fixed on the same movable seat. Two spaced force-applying contact blocks are fixedly arranged on the top of each movable seat. An inclined guide surface is arranged on the top of each force-applying contact block.

[0012] An extension arm is provided at the bottom of the movable pressure plate corresponding to the position of each force - applying contact block, and a roller is rotatably provided at the end of each extension arm. The rollers on each extension arm can respectively contact the inclined guide surfaces on the corresponding force - applying contact blocks.

[0013] A further setting is that the two movable seats are fixed by a fixed block, so that the two movable seats can move synchronously.

[0014] A further setting is that an electric cylinder is fixedly provided on the top of the support plate. The output shaft of the electric cylinder is fixed on the fixed block. The electric cylinder is provided with a second insertion terminal, and a second socket is welded on the main control board. The second insertion terminal can extend out of the external housing to form an insertion fit with the second socket, so that the electric cylinder is electrically connected to the single - chip microcomputer. A second through - hole for the second insertion terminal to extend out is opened at the bottom of the external housing.

[0015] A further setting is that a tension spring is provided in each stroke inner groove. One end of each tension spring is fixed at the bottom of the corresponding stroke inner groove, and the other end is fixed at the bottom of the corresponding stroke insertion rod.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. In the present utility model, an external housing is provided for inserting the circuit board. The pressing and fixing member can be matched and positioned with the circuit board inserted laterally into the cavity. After positioning, the circuit board is pressed and fixed, which has the advantages of convenient installation and disassembly of the circuit board. At the same time, without bolt fixation, the installation process is more convenient, improving the installation flexibility. After the circuit board is pressed and fixed by the pressing and fixing member, the temperature sensor will be in contact with the side wall of the box body, and the temperature inside the box body is monitored based on contact - type heat conduction, realizing more accurate temperature monitoring. In addition, the first socket on the circuit board can form an insertion fit with the first socket on the main control board, so that the temperature sensor is electrically connected to the single - chip microcomputer, and the connection method is convenient.

[0018] 2. In the present utility model, the positioning column can be in contact with the side wall of the box body to protect the temperature sensor.

[0019] 3. In the present utility model, each stroke insertion rod and the corresponding stroke sleeve rod are in movable cooperation, which can limit the moving direction of the stroke insertion rod. The two positioning convex blocks and the two positioning grooves are positioned by means of damping insertion, which can prevent the circuit board from falling and enable the movable pressure plate to smoothly press and fix the circuit board.

[0020] 4. In the present utility model, the movable seat can slide along the corresponding track, and the inclined guide surface on the force - applying contact block can contact the roller. As the force - applying contact block moves, it can drive the movable pressure block to approach or move away from the support plate.

[0021] 5. In the present utility model, two movable seats are fixed by fixing blocks, so that the two movable seats can move synchronously.

[0022] 6. In the present utility model, an electric cylinder is used to control the movement of the fixing block, and the second plugging terminal and the second plugging socket are plugged to realize the control of the electric cylinder by the single-chip microcomputer.

[0023] 7. In the present utility model, a tension spring is used to ensure that there is a space between the movable pressing plate and the side wall of the box body for the lateral insertion and extraction of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the embodiment;

[0025] Figure 2 is Figure 1 an enlarged view of part A in

[0026] Figure 3 It is a schematic internal structure diagram of the external housing in the embodiment;

[0027] Figure 4 It is a schematic structural diagram of the pressing and fixing member in the embodiment;

[0028] Figure 5 It is a schematic structural diagram of the stroke sleeve rod and the stroke plug rod in the embodiment;

[0029] Figure 6 It is a schematic structural diagram of the main control board in the embodiment.

[0030] In the figure: 11, box body; 12, transformer body; 21, external housing; 211, cabinet door; 22, inner cavity; 31, circuit board; 311, temperature sensor; 32, positioning column; 33, positioning convex block; 41, control panel; 42, main control board; 421, single-chip microcomputer; 43, display screen; 511, first plugging terminal; 512, first plugging socket; 513, first through hole; 521, second plugging terminal; 522, second plugging socket; 523, second through hole; 61, support plate; 611, bottom column; 62, movable pressing plate; 621, positioning groove; 63, stroke sleeve rod; 631, inner stroke groove; 64, stroke plug rod; 71, track; 72, slider; 73, movable seat; 74, force-applying contact block; 741, inclined guide surface; 75, fixing block; 76, electric cylinder; 81, extension arm; 82, roller; 91, tension spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0032] As shown in the Figures 1 to 6 accompanying drawings;

[0033] This embodiment discloses a photovoltaic box-type transformer with a temperature monitoring function, which includes a box body 11. A transformer body 12 is built in the box body 11. An external shell 21 is fixedly arranged on the right side of the box body 11. An inner cavity 22 is provided in the external shell 21. A cabinet door 211 is hingedly arranged on the external shell 21; a circuit board 31 is detachably inserted in the inner cavity 22. A temperature sensor 311 is welded on the front of the circuit board 31; a pressing member is arranged in the inner cavity 22. After the circuit board 31 is vertically inserted laterally into the inner cavity 22, it can be positioned in cooperation with the pressing member; after the circuit board 31 is positioned in cooperation with the pressing member, it can be pressed by the pressing member; after the circuit board 31 is pressed by the pressing member, the temperature sensor 311 will be in contact with the side wall of the box body 11, and the temperature inside the box body 11 is monitored based on contact heat conduction;

[0034] A control panel 41 is fixedly arranged on the front of the box body 11. A power supply, a main control board 42 powered by the power supply, and a display screen 43 are arranged in the control panel 41. A single-chip microcomputer 421 is configured on the main control board 42. An opening window for the display screen 43 to be exposed is opened on the front of the control panel 41; a first plug terminal 511 is welded on the circuit board 31, and a first socket 512 is welded on the main control board 42. The first plug terminal 511 can extend out of the external shell 21 to form an insertion fit with the first socket 512, so that the temperature sensor 311 and the single-chip microcomputer 421 are electrically connected. A first through hole 513 for the first plug terminal 511 to extend out is opened at the bottom of the external shell 21.

[0035] It should be noted that in this embodiment, the model of the temperature sensor 311 is DS18B20, the model of the single-chip microcomputer 421 is STM8, and the display screen 43 is a touchable TFT touch screen, which is convenient for controlling the electric cylinder 76.

[0036] Among them, a plurality of positioning posts 32 with the same height as the temperature sensor 311 are welded on the front of the circuit board 31. The positioning posts 32 can be in contact with the side wall of the box body 11 to protect the temperature sensor 311.

[0037] Among them, the pressing member includes a support plate 61 and a movable pressing plate 62. The support plate 61 is fixed on the right inner wall of the inner cavity 22. Four bottom posts 611 are regularly arranged at the bottom of the support plate 61. The four bottom posts 611 are fixed on the right inner wall of the inner cavity 22. A plurality of stroke sleeve rods 63 are regularly arranged at the top of the support plate 61. A stroke inner groove 631 is opened inside each stroke sleeve rod 63; a plurality of stroke insertion rods 64 that can be respectively inserted into the inside of each stroke sleeve rod 63 are regularly arranged at the bottom of the movable pressing plate 62. Each stroke insertion rod 64 is movably matched with the corresponding stroke sleeve rod 63;

[0038] Two positioning grooves 621 are formed at the top of the movable pressure plate 62. Two positioning bumps 33 are fixedly arranged on the back of the circuit board 31. After the circuit board 31 is vertically inserted into the inner cavity 22 laterally, the two positioning bumps 33 can respectively extend into the two positioning grooves 621 with damping, so that the circuit board 31 is positioned in cooperation with the pressing member.

[0039] Among them, two parallel tracks 71 are fixedly arranged on the top of the support plate 61. Two sliders 72 capable of sliding along the corresponding tracks 71 are embedded on each track 71. The tops of the two sliders 72 are fixed on the same movable seat 73. Two spaced force-applying contact blocks 74 are fixedly arranged on the top of each movable seat 73. An inclined guide surface 741 is arranged on the top of each force-applying contact block 74.

[0040] Extension arms 81 are arranged at the bottom of the movable pressure plate 62 corresponding to the position of each force-applying contact block 74. Rollers 82 are rotatably arranged at the ends of each extension arm 81. The rollers 82 on each extension arm 81 can respectively contact the inclined guide surfaces 741 on the corresponding force-applying contact blocks 74.

[0041] Among them, the two movable seats 73 are fixed by a fixing block 75, so that the two movable seats 73 can move synchronously.

[0042] Among them, an electric cylinder 76 is fixedly arranged on the top of the support plate 61. The output shaft of the electric cylinder 76 is fixed on the fixing block 75. The electric cylinder 76 is provided with a second plug terminal 521. A second socket 522 is welded on the main control board 42. The second plug terminal 521 can extend out of the external housing 21 to form an insertion fit with the second socket 522, so that the electric cylinder 76 is electrically connected to the single-chip microcomputer 421. A second through hole 523 for the second plug terminal 521 to extend out is formed at the bottom of the external housing 21.

[0043] Among them, a tension spring 91 is arranged in each stroke inner groove 631. One end of each tension spring 91 is fixed at the bottom of the corresponding stroke inner groove 631, and the other end is fixed at the bottom of the corresponding stroke insertion rod 64.

[0044] The working principle of this embodiment is as follows:

[0045] When installing the circuit board 31, face the front side of the circuit board 31 to the left and insert it vertically and laterally into the inner cavity 22. Then, respectively insert the two positioning bumps 33 into the two positioning slots 621 in a damped manner, so that the circuit board 31 is positioned in cooperation with the pressing member to prevent the circuit board 31 from falling. Next, control the electric cylinder 76 to act. The electric cylinder 76 will drive the two movable seats 73 to move, and the rollers 82 will move along the inclined guide surface 741 on the force-applying contact block 74, thereby causing the movable pressing plate 62 to move leftward and driving the circuit board 31 to move leftward until the two positioning posts 32 on the circuit board 31 are in contact with the side wall of the box body 11. At this time, the temperature sensor 311 will be in contact with the side wall of the box body 11, and the temperature inside the box body 11 will be monitored based on contact heat conduction. Finally, form an insertion fit between the first insertion terminal 511 on the circuit board 31 and the first socket 512, so that the power supply supplies power to the temperature sensor 311. The temperature sensor 311 can feedback the monitored temperature value to the single-chip microcomputer 421 and display it on the display screen 43. Additionally, the temperature value can also be remotely transmitted to the terminal.

[0046] When disassembling the circuit board 31, control the electric cylinder 76 to act, so that the movable pressing plate 62 moves rightward and drives the circuit board 31 to move rightward at the same time. A gap is generated between the movable pressing plate 62 and the side wall of the box body 11 for the hand to reach in. Then, pull the circuit board 31 to the left. After the two positioning bumps 33 are separated from the two positioning slots 621, the circuit board 31 can be taken out.

[0047] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A photovoltaic box-type transformer with a temperature monitoring function, comprising a box (11), wherein the box (11) has a transformer body (12) built therein, characterized in that: An external shell (21) is fixedly arranged on the right side of the box body (11), and an inner cavity (22) is provided in the external shell body (21), and a circuit board (31) is detachably inserted in the inner cavity (22), and a temperature sensor (311) is welded on the front of the circuit board (31); a pressing component is arranged in the inner cavity (22), and after the circuit board (31) is vertically inserted into the inner cavity (22), it can be positioned in coordination with the pressing component; after the circuit board (31) is positioned in coordination with the pressing component, it can be pressed by the pressing component; after the circuit board (31) is pressed by the pressing component, the temperature sensor (311) will be in contact with the side wall of the box body (11), and the temperature in the box body (11) is monitored based on contact heat conduction; A control panel (41) is fixedly arranged on the front of the box (11), a power supply and a main control board (42) and a display screen (43) powered by the power supply are arranged inside the control panel (41), a single-chip microcomputer (421) is arranged on the main control board (42), and a window is provided on the front of the control panel (41) for the display screen (43) to be exposed; a first plug-in terminal (511) is welded on the circuit board (31), a first plug-in socket (512) is welded on the main control board (42), the first plug-in terminal (511) can extend out of the external housing (21) to form a plug-in connection with the first plug-in socket (512), so that the temperature sensor (311) and the single-chip microcomputer (421) are electrically connected, and a first through hole (513) for the first plug-in terminal (511) to be led out is provided at the bottom of the external housing (21).

2. The photovoltaic box-type transformer with temperature monitoring function according to claim 1 is characterized in that: A plurality of positioning posts (32) having the same height as the temperature sensor (311) are welded on the front side of the circuit board (31).

3. The photovoltaic box-type transformer with temperature monitoring function according to claim 1 is characterized in that: The pressing component comprises a support plate (61) and a movable pressure plate (62), wherein the support plate (61) is fixed on the right inner wall of the inner cavity (22), and a plurality of travel sleeve rods (63) are regularly arranged on the top of the support plate (61), and a travel inner groove (631) is provided inside each of the travel sleeve rods (63); a plurality of travel plug rods (64) which can be respectively inserted into each of the travel sleeve rods (63) are regularly arranged on the bottom of the movable pressure plate (62), and each of the travel plug rods (64) is movably matched with the corresponding travel sleeve rod (63); The movable pressure plate (62) has two positioning grooves (621) on its top, and the circuit board (31) has two positioning protrusions (33) fixedly disposed on its back. After the circuit board (31) is vertically and laterally inserted into the inner cavity (22), the two positioning protrusions (33) can respectively extend into the two positioning grooves (621) with damping, so that the circuit board (31) and the pressing component are positioned in coordination.

4. The photovoltaic box-type transformer with temperature monitoring function according to claim 3 is characterized in that: Two parallel rails (71) are fixedly arranged on the top of the support plate (61), and two sliders (72) capable of sliding along the corresponding rails (71) are embedded on each of the rails (71), and the tops of the two sliders (72) are fixed on the same movable seat (73); two spaced force contact blocks (74) are fixedly arranged on the top of each movable seat (73), and an inclined guide surface (741) is arranged on the top of each force contact block (74); An extension arm (81) is provided at the bottom of the movable pressure plate (62) corresponding to the position of each force contact block (74), and a roller (82) is rotatably provided at the end of each extension arm (81), and the roller (82) on each extension arm (81) can respectively contact the inclined guide surface (741) on the corresponding force contact block (74).

5. The photovoltaic box-type transformer with temperature monitoring function according to claim 4 is characterized in that: The two movable seats (73) are fixed by a fixing block (75) so that the two movable seats (73) can move synchronously.

6. The photovoltaic box-type transformer with temperature monitoring function according to claim 5 is characterized in that: An electric cylinder (76) is fixedly arranged on the top of the support plate (61); an output shaft of the electric cylinder (76) is fixed on a fixed block (75); a second plug-in terminal (521) is arranged on the electric cylinder (76); a second plug-in socket (522) is welded on the main control board (42); the second plug-in terminal (521) can extend out of the external housing (21) to form a plug-in connection with the second plug-in socket (522) so as to allow the electric cylinder (76) to be electrically connected to the single-chip computer (421); and a second through hole (523) for leading out the second plug-in terminal (521) is provided at the bottom of the external housing (21).

7. The photovoltaic box-type transformer with temperature monitoring function according to claim 3 is characterized in that: A tension spring (91) is provided in each of the travel inner grooves (631), and one end of each of the tension springs (91) is fixed to the bottom of the corresponding travel inner groove (631), and the other end is fixed to the bottom of the corresponding travel insertion rod (64).

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