Internal temperature monitoring and early warning device for low-voltage frequency converter

Abstract

The invention belongs to the technical field of temperature monitoring, and discloses a low-voltage frequency converter internal temperature monitoring and early warning device. Comprising a front mounting shell, a rear mounting shell is mounted on the rear side of the front mounting shell, a driving plate is mounted in the rear mounting shell, a heat insulation structure is mounted on the driving plate, a detection structure corresponding to the heat insulation structure is mounted in the front mounting shell, and a heat dissipation structure is mounted on the lower side of the rear mounting shell; through cooperation of structures such as the temperature sensing air bag and the push-pull piston cavity, the temperature sensing air which expands when heated in the temperature sensing air bag senses the temperature in the corresponding heat insulation plate, and then the relative position of the sliding piston in the push-pull piston cavity is adjusted, so that the corresponding heat insulation plate matched with the sliding piston in a limiting mode slides on the cross-shaped mounting frame; and infrared heat radiation blocked by the heat insulation plates is adjusted, and along with temperature rise sensed by the temperature sensing air bag, the heat insulation plates distributed in the circumferential direction in an array mode gather towards the center position of the cross-shaped mounting frame, and a closed round pipe is formed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of temperature monitoring, and specifically relates to a low-voltage frequency converter internal temperature monitoring and early warning device. BACKGROUND

[0002] In power construction, low-voltage frequency converters are more applied in power plants, and the low-voltage frequency converter plays an important role in the auxiliary system of the plant, can realize variable frequency starting of electrical equipment, greatly reduces the starting instantaneous current of high-power motors, effectively reduces the dependence on security power capacity, and is a power control device for controlling AC motors by changing the frequency of motor working power supply.

[0003] However, in a general low-voltage frequency converter, the thermal radiation emitted by multiple heat-emitting electronic components will form superimposed infrared thermal radiation, which will affect the temperature monitored by the infrared temperature sensor, and the monitored temperature will be higher than the highest temperature of each electronic component, so that the temperature monitored by the infrared temperature sensor is not accurate enough, and the use of the equipment is affected. SUMMARY

[0004] To solve the problem that the infrared thermal radiation emitted by multiple electronic components will be superimposed, and the temperature monitored by the infrared temperature sensor is higher than the real-time temperature of the electronic components, the application provides a low-voltage frequency converter internal temperature monitoring and early warning device.

[0005] To achieve the above purpose, the application provides the following technical scheme: a low-voltage frequency converter internal temperature monitoring and early warning device, comprising a front mounting shell, a rear mounting shell is mounted on the rear side of the front mounting shell, a drive plate is mounted in the rear mounting shell, a heat insulation structure is mounted on the drive plate, a detection structure corresponding to the heat insulation structure is mounted in the front mounting shell, and a heat dissipation structure is mounted on the lower side of the rear mounting shell.

[0006] The heat insulation structure comprises mounting supports which are circumferentially arrayed on the drive plate, and a cross-shaped mounting frame is jointly mounted in the mounting supports, and the cross-shaped mounting frame is slidably connected with heat insulation plates which are circumferentially arrayed.

[0007] The heat dissipation structure comprises early warning assemblies which are circumferentially arrayed around a rotating shaft, the early warning assembly comprises an early warning shell mounted on the rotating shaft, a sliding block is slidably connected in the early warning shell, an early warning air bag is mounted in the sliding block, and an early warning pipe is mounted at one end of the rotating shaft.

[0008] Preferably, an inductance coil is mounted on the driving plate, symmetrically distributed driving chips are mounted on the driving plate, and the heat insulation structure is located at the center position of the inductance coil and the driving chips.

[0009] Preferably, the detection structure comprises a mounting threaded rod mounted in the front mounting shell, a sliding mounting frame is slidably connected to the mounting threaded rod, symmetrically distributed fastening nuts are threadedly connected to the mounting threaded rod and distributed on both sides of the sliding mounting frame, an infrared temperature sensor is mounted on the sliding mounting frame, and the axis of the infrared temperature sensor corresponds to the axis of the circumferentially arrayed heat insulation plate.

[0010] Preferably, the cross mounting frame is provided with circumferentially arrayed push-pull piston cavities corresponding to the heat insulation plates, a sliding piston is slidably connected in the push-pull piston cavities, a pressure spring is arranged between the push-pull piston cavities and the end of the sliding piston away from the heat insulation plates, the sliding piston is slidably connected to the cross mounting frame, and the sliding piston is limitedly matched with the corresponding heat insulation plate.

[0011] Preferably, the push-pull piston cavities are provided with a connecting air pipe, the connecting air pipe is in communication with the push-pull piston cavities, the other end of the connecting air pipe is in communication with a temperature sensing air bag, and a temperature sensing gas that expands under heat is arranged in the temperature sensing air bag.

[0012] Preferably, a motor support is mounted on the lower side of the rear mounting shell, a rotating motor is mounted in the motor support, the output shaft of the rotating motor is fixedly connected with a rotating shaft, and a heat dissipation fan is mounted on the lower end of the rotating shaft.

[0013] Preferably, a limiting tension spring is arranged between the side of the early warning shell body close to the rotating shaft and the side of the sliding block close to the rotating shaft, a valve is arranged between the early warning air bag and the early warning pipe, upper and lower symmetrically distributed blocking plates are mounted on the early warning pipe, and the end of the blocking plate away from the early warning pipe is slidably connected with the inside of the early warning shell body.

[0014] Preferably, a through groove for mounting the early warning air bag is formed in the sliding block, and a communication groove between the early warning pipe and the sliding block is formed in the early warning shell body.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] The application sets the cooperation of the temperature sensing air bag and the push-pull piston cavity, the temperature sensing gas in the temperature sensing air bag senses the temperature in the corresponding heat insulation plate through the heat expansion, and then adjusts the relative position of the sliding piston in the push-pull piston cavity, so that the corresponding heat insulation plate matched with the sliding piston slides on the cross mounting frame, and then adjusts the infrared thermal radiation blocked by the heat insulation plate, and as the temperature sensed by the temperature sensing air bag increases, the circumferentially arrayed heat insulation plates gather to the center position of the cross mounting frame, forming a closed circular pipe, enhancing the blocking of the infrared thermal radiation emitted outward by the plurality of inductance coils and the driving chip, so that the temperature detected by the infrared temperature sensor approaches the highest temperature in the plurality of inductance coils and the driving chip; at the same time, the rotating motor electrically connected with the infrared temperature sensor receives the electric signal of the infrared temperature sensor, drives the cooling fan to rotate, cools the front mounting shell and the rear mounting shell, and drives the early warning assembly to rotate, when the rotating speed of the rotating shaft is too fast, the sliding block slides out of the early warning shell, and then drives the early warning air bag to slide synchronously, the early warning air bag is blocked by the blocking plate, so that the gas in the early warning air bag is sprayed into the early warning pipe, and then the early warning sound is emitted through the sound emitting structure in the early warning pipe, and the operator is warned. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the application;

[0018] Figure 2 It is a structural schematic diagram of the application;

[0019] Figure 3 It is a detection structure schematic diagram of the application;

[0020] Figure 4 It is a heat dissipation structure schematic diagram of the application;

[0021] Figure 5 It is a push-pull piston cavity structure sectional view of the application;

[0022] Figure 6 It is a temperature sensing air bag and push-pull piston cavity connection schematic diagram of the application;

[0023] Figure 7 It is a heat dissipation structure connection schematic diagram of the application;

[0024] Figure 8 It is a warning structure connection schematic diagram of the application;

[0025] Figure 9 It is a warning structure internal sectional view of the application.

[0026] In the figure: 1, front mounting shell; 2, rear mounting shell; 3, driving plate; 4, inductance coil; 5, driving chip;

[0027] 6. Detection structure; 61. Install threaded rod; 62. Tighten nut; 63. Sliding mounting bracket; 64. Infrared temperature sensor;

[0028] 7. Thermal insulation structure; 71. Mounting bracket; 72. Cross mounting bracket; 73. Thermal insulation board; 74. Push-pull piston chamber; 75. Sliding piston; 76. Pressure spring; 77. Temperature-sensing airbag; 78. Connecting air pipe;

[0029] 8. Heat dissipation structure; 81. Motor bracket; 82. Rotating motor; 83. Cooling fan; 84. Rotating shaft;

[0030] 85. Warning component; 851. Warning housing; 852. Sliding block; 853. Limiting spring; 854. Warning airbag; 855. Warning tube; 856. Stop plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 9 As shown, the present invention provides a low-voltage frequency converter internal temperature monitoring and early warning device, including a front mounting shell 1, a rear mounting shell 2 mounted on the rear side of the front mounting shell 1, a drive board 3 mounted inside the rear mounting shell 2, a heat insulation structure 7 mounted on the drive board 3, a detection structure 6 corresponding to the heat insulation structure 7 mounted inside the front mounting shell 1, and a heat dissipation structure 8 mounted on the lower side of the rear mounting shell 2.

[0033] Among them, the heat insulation structure 7 includes a mounting bracket 71 mounted on the drive plate 3 in a circumferential array, a cross mounting bracket 72 is mounted in the mounting bracket 71, and heat insulation plates 73 distributed in a circumferential array are slidably connected on the cross mounting bracket 72 respectively.

[0034] The heat dissipation structure 8 includes a circumferential array of hunger warning components 85 around the rotation axis 84. Each warning component 85 includes a warning housing 851 mounted on the rotation axis 84. A sliding block 852 is slidably connected inside the warning housing 851. A warning airbag 854 is installed inside the sliding block 852. A warning tube 855 is installed at one end of the warning airbag 854 along the rotation axis 84.

[0035] In the above manner: since the internal drive board 3 has multiple heat-emitting components during use of the general low-voltage frequency converter, the multiple heat-emitting components will emit infrared radiation, which will further cause superposition of the infrared radiation, causing the real-time temperature monitored by the detection structure 6 to be too high, which will further affect the monitoring result. By arranging the circumferentially arrayed heat insulation plates 73 near the detection structure 6, the influence of the infrared radiation on the detection structure 6 is adjusted by adjusting the position of the heat insulation plates 73 on the cross-shaped mounting frame 72. When the temperature in the rear mounting shell 2 increases, the heat insulation plates 73 slide to the center position of the cross-shaped mounting frame 72 until the heat insulation plates 73 are tightly attached to each other, thereby forming a closed loop pipe, so that the influence of the heat radiation reaches the highest, to ensure that the temperature detected by the detection structure 6 is appropriate.

[0036] By the electrical connection between the detection structure 6 and the heat dissipation structure 8, when the temperature detected by the detection structure 6 is high, an electrical signal is output to the heat dissipation structure 8, so that the heat dissipation structure 8 rotates to dissipate heat in the rear mounting shell 2. When the temperature in the rear mounting shell 2 is higher than the preset value, the rotation speed of the heat dissipation structure 8 is increased, thereby causing the sliding block 852 in the early warning shell 851 to slide outward due to centrifugal force, thereby driving the early warning air bag 854 to slide synchronously, thereby extruding the early warning air bag 854, so that the gas in the early warning air bag 854 flows into the early warning pipe 855, and the sound emitting structure in the early warning pipe 855 emits a sound, thereby issuing a warning.

[0037] As shown in Figure 1 and Figure 2 , the drive board 3 is provided with an inductor coil 4, and the drive board 3 is provided with symmetrically distributed drive chips 5, and the heat insulation structure 7 is located at the common center position of the inductor coil 4 and the drive chip 5.

[0038] In the above manner: since the drive board 3 is provided with the inductor coil 4 and the multiple drive chips 5, and the inductor coil 4 and the drive chip 5 will emit infrared radiation during use of the device, thereby causing superposition of the heat radiation at the common center position of the inductor coil 4 and the drive chip 5, causing the temperature monitored by the detection structure 6 to be the real-time corresponding temperature of the inductor coil 4 and the drive chip 5, thereby causing the monitoring result of the detection structure 6 to be inaccurate. By arranging the detection structure 6 and the heat insulation structure 7 at the center position of the inductor coil 4 and the drive chip 5, the influence of the heat radiation on the detection result of the detection structure 6 is adjusted by the heat insulation structure 7.

[0039] As shown in Figure 3As shown, the detection structure 6 comprises a mounting threaded rod 61 mounted in the front mounting shell 1, a sliding mounting frame 63 is slidably connected on the mounting threaded rod 61, and symmetrically distributed fastening nuts 62 are threadedly connected on the mounting threaded rod 61 and distributed on both sides of the sliding mounting frame 63, and an infrared temperature sensor 64 is mounted on the sliding mounting frame 63, and the axis of the infrared temperature sensor 64 corresponds to the axis of the circumferentially arrayed heat insulation plate 73.

[0040] With the above structure: through the mounting threaded rod 61 mounted in the front mounting shell 1, the fastening nuts 62 and the sliding mounting frame 63 sliding on the mounting threaded rod 61, the sliding mounting frame 63 is slid by the operator to align the center position of the inductance coil 4 and the driving chip 5, and then the sliding mounting frame 63 is fixed on the mounting threaded rod 61 by rotating the fastening nuts 62 on both sides, and then the infrared temperature sensor 64 is aligned with the axis of the heat insulation plate 73, so as to ensure that the temperature monitored by the infrared temperature sensor 64 approaches the real-time highest temperature of the inductance coil 4 and the driving chip 5 with the assistance of the heat insulation plate 73.

[0041] As shown in Figure 4 and Figure 5 , the cross mounting frame 72 is provided with a circumferentially arrayed push-pull piston cavity 74 corresponding to the heat insulation plate 73, the push-pull piston cavity 74 is slidably connected with a sliding piston 75, and a compression spring 76 is arranged between the push-pull piston cavity 74 and the end of the sliding piston 75 away from the heat insulation plate 73, the sliding piston 75 is slidably connected with the cross mounting frame 72, and the sliding piston 75 is limitedly matched with the corresponding heat insulation plate 73.

[0042] In the above manner: through the push-pull piston cavity 74 mounted on the cross mounting frame 72, the sliding piston 75 slides on the cross mounting frame 72, and then drives the heat insulation plate 73 in contact with the sliding piston 75 to slide synchronously, and then adjusts the position of the heat insulation plate 73 on the cross mounting frame 72, so as to block the influence of the heat radiation of the inductance coil 4 and the driving chip 5 on the temperature monitored by the infrared temperature sensor 64, when the inductance coil 4 and the driving chip 5 generate more heat, the sliding piston 75 slides towards the center of the cross mounting frame 72, and then the circumferentially distributed heat insulation plates 73 gather towards the center line position of the cross mounting frame 72, until a closed circular tube structure is formed, through the material of the heat insulation plate 73, the superposition of infrared heat radiation of the inductance coil 4 and the driving chip 5 is avoided, and then the infrared temperature monitored by the infrared temperature sensor 64 is as far as possible to avoid the influence of the superposition of infrared heat radiation.

[0043] As shown in Figure 5 and Figure 6As shown, the push-pull piston cavity 74 is provided with a connecting air pipe 78, which is in communication with the push-pull piston cavity 74, and the other end of the connecting air pipe 78 is in communication with the temperature sensing air bag 77, and the temperature sensing air bag 77 is provided with a temperature sensing gas that expands when heated.

[0044] In the above manner, the temperature sensing gas in the temperature sensing air bag 77 expands when the temperature sensing air bag 77 is heated, thereby increasing the air pressure in the push-pull piston cavity 74 connected by the connecting air pipe 78, thereby pushing the sliding piston 75 to slide to the center of the cross mounting frame 72, thereby pressing the pressure spring 76 to contract, and simultaneously driving the heat insulation plate 73 to slide synchronously, thereby avoiding the influence of the superimposed infrared thermal radiation on the infrared temperature sensor 64.

[0045] As shown in Figure 7 The rear mounting shell 2 is provided with a motor support 81 on the lower side, and the motor support 81 is provided with a rotating motor 82, and the output shaft of the rotating motor 82 is fixedly connected with a rotating shaft 84, and the lower end of the rotating shaft 84 is provided with a cooling fan 83.

[0046] In the above manner, when the temperature monitored by the infrared temperature sensor 64 is higher than the preset value, the rotating motor 82 drives the cooling fan 83 to rotate through the rotating shaft 84, thereby cooling the inside of the front mounting shell 1 and the rear mounting shell 2.

[0047] As shown in Figure 8 and Figure 9 The limiting tension spring 853 is arranged between the side of the rotating shaft 84 close to the sliding block 852 and the side of the sliding block 852 close to the rotating shaft 84, and the valve is arranged between the warning air bag 854 and the warning pipe 855, and the blocking plate 856 is symmetrically arranged on the warning pipe 855, and the end of the blocking plate 856 away from the warning pipe 855 is slidingly connected with the inside of the warning shell 851.

[0048] In the above manner, when the rotating speed of the rotating shaft 84 is high, the sliding block 852 slides out of the warning shell 851, and the blocking plate 856 is hindered by the warning shell 851, so that the warning air bag 854 is squeezed, and the gas in the warning air bag 854 is sprayed outwards through the warning pipe 855, and the sound is emitted by the generating structure in the warning pipe 855, and the warning is transmitted outwards, so that the operator can adjust the device in time.

[0049] As shown in Figure 9 The sliding block 852 is provided with a through slot for installing the warning air bag 854, and the warning shell 851 is provided with a communication groove between the warning pipe 855 and the sliding block 852.

[0050] In the above manner: by opening the communication groove on the early warning shell 851, and then making the sound of the gas emitted by the early warning air bag 854 to the gas in the early warning pipe 855 emit outward through the communication groove on the early warning shell 851, by opening the communication groove upward and downward, the early warning sound can be better transmitted outward.

[0051] It should be noted that in this text, relational terms such as first and second and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying that there is any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A low-voltage frequency converter internal temperature monitoring and early warning device, comprising a front mounting shell (1), a rear mounting shell (2) is mounted on the rear side of the front mounting shell (1), a drive board (3) is mounted in the rear mounting shell (2), a heat insulation structure (7) is mounted on the drive board (3), a detection structure (6) corresponding to the heat insulation structure (7) is mounted in the front mounting shell (1), and a heat dissipation structure (8) is mounted on the lower side of the rear mounting shell (2), characterized in that: wherein the heat insulation structure (7) comprises mounting brackets (71) arranged in a circumferential array on the drive board (3), and a cross mounting frame (72) is jointly mounted in the mounting bracket (71); and a circumferential array of heat insulation plates (73) are respectively and slidably connected to the cross mounting frame (72); the heat dissipation structure (8) comprises a plurality of early warning assemblies (85) arranged in a circumferential array around a rotating shaft (84); each early warning assembly (85) comprises an early warning shell (851) mounted on the rotating shaft (84); a sliding block (852) is slidably connected in the early warning shell (851); and an early warning air bag (854) is mounted in the sliding block (852); and an early warning pipe (855) is mounted on one end of the early warning air bag (854) away from the rotating shaft (84).

2. The low-voltage variable frequency drive internal temperature monitoring and early warning device according to claim 1, characterized in that: an inductance coil (4) is mounted on the drive board (3); symmetrically distributed drive chips (5) are mounted on the drive board (3); and the heat insulation structure (7) is located at the common center position of the inductance coil (4) and the drive chips (5).

3. The low-voltage variable frequency drive internal temperature monitoring and early warning device of claim 1, wherein: the detection structure (6) comprises a mounting threaded rod (61) mounted in the front mounting shell (1); a sliding mounting frame (63) is slidably connected to the mounting threaded rod (61); symmetrically distributed fastening nuts (62) are threadedly connected to the mounting threaded rod (61) on both sides of the sliding mounting frame (63); and an infrared temperature sensor (64) is mounted on the sliding mounting frame (63); the axis of the infrared temperature sensor (64) corresponds to the axis of the circumferentially arrayed heat insulation plates (73).

4. The low-voltage variable frequency drive internal temperature monitoring and early warning device of claim 1, wherein: the cross mounting frame (72) is provided with a circumferential array of push-pull piston cavities (74) corresponding to the heat insulation plates (73); a sliding piston (75) is slidably connected in the push-pull piston cavity (74); a pressure spring (76) is arranged between the push-pull piston cavity (74) and the end of the sliding piston (75) away from the heat insulation plate (73); the sliding piston (75) is slidably connected to the cross mounting frame (72); and the sliding piston (75) is limitingly matched with the corresponding heat insulation plate (73).

5. The low-voltage variable frequency drive internal temperature monitoring and early warning device according to claim 4, characterized in that: a connecting air pipe (78) is mounted on the push-pull piston cavity (74); the connecting air pipe (78) is in communication with the push-pull piston cavity (74); the other end of the connecting air pipe (78) is in communication with a temperature sensing air bag (77); and a temperature sensing gas that expands under heat is arranged in the temperature sensing air bag (77).

6. The low voltage variable frequency drive internal temperature monitoring and warning device of claim 1, wherein: The rear mounting shell (2) is internally mounted with a motor support (81), the motor support (81) is internally mounted with a rotating motor (82), the output shaft of the rotating motor (82) is fixedly connected with a rotating shaft (84), and the lower end of the rotating shaft (84) is mounted with a heat dissipation fan (83).

7. The low voltage variable frequency drive internal temperature monitoring and warning device of claim 6, wherein: A limiting tension spring (853) is arranged between the side, close to the rotating shaft (84), of the early warning shell (851) and the side, close to the rotating shaft (84), of the sliding block (852), a valve is arranged between the early warning air bag (854) and the early warning pipe (855), the early warning pipe (855) is mounted with up-and-down symmetrically distributed blocking plates (856), and the end, away from the early warning pipe (855), of the blocking plates (856) is slidably connected with the inside of the early warning shell (851).

8. The low-voltage variable frequency drive internal temperature monitoring and early warning device of claim 7, wherein: A through groove for mounting the early warning air bag (854) is formed in the sliding block (852), and a communication groove is formed in the early warning shell (851) between the early warning pipe (855) and the sliding block (852).

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