A temperature measuring device for safe operation of generator sets

Abstract

The utility model relates to the technical field of generator sets, and is a temperature measuring device for safe operation of the generator set. The temperature measuring device comprises a cabinet body, and also comprises a temperature measuring mechanism arranged in the cabinet body for monitoring the temperature of a thyristor element. The temperature measuring mechanism comprises a temperature detector, an optical fiber is connected to a signal input interface of the temperature detector, one end of the optical fiber is fixedly connected to a temperature measuring probe, the temperature measuring probe is fixed at the center of the thyristor element, a communication interface line is connected to the signal input interface of the temperature detector, and one end of the communication interface line is signal-connected to a monitor, so as to solve the problem that the thyristor element of the power cabinet of the excitation system of the generator set is not equipped with a temperature monitoring element, and the thyristor element of the power cabinet often fails to overheat and break down due to poor heat dissipation in actual operation, which is particularly serious in summer, and there is no effective monitoring means during the operation of the unit, which seriously affects the safe operation of the generator set.

Description

Technical Field

[0001] The utility model relates to the technical field of generator sets, in particular to a temperature measuring device for the safe operation of generator sets. Background Art

[0002] With the rapid development of the power system and the growth of the single-machine capacity, the excitation power required by large synchronous generators has also increased significantly, and the design of power cabinets has also changed accordingly. In recent years, the research and development of high-power and high-parameter thyristor rectifier components in my country has reached the international advanced level. Therefore, there are rich choices for the selection of thyristor rectifier components when designing the power of the excitation device. The junction temperature of the thyristor is an important parameter that determines the rated current of the thyristor, and it is also a reference data for the maximum current value output by the power cabinet. The excitation system standard generally gives a temperature rise limit of 40°C at the junction of the thyristor and the heat sink. The thyristor manufacturer's information clearly stipulates that the temperature of the thyristor is not allowed to exceed 125°C when it is used, otherwise it will cause damage to the thyristor. Therefore, thyristor temperature monitoring is an important function of the excitation power cabinet.

[0003] The existing common temperature measuring components are not suitable for high-voltage and strong magnetic environments. The thyristor components in the power cabinet of the generator set excitation system are not equipped with temperature monitoring components. In actual operation, the thyristor components in the power cabinet often fail due to overheating and breakdown due to poor heat dissipation, which is particularly serious in summer. There is no effective monitoring method during the operation of the unit, which seriously affects the safe operation of the generator set. Since thyristors are high-voltage live equipment and are small in size, traditional contact temperature sensors cannot be installed. Therefore, the current excitation power cabinets all use indirect measurement methods, which have large insulation and electromagnetic interference, low measurement accuracy, and low safety factor. Utility Model Content

[0004] The purpose of the utility model is to provide a temperature measuring device for the safe operation of a generator set, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a temperature measuring device for safe operation of a generator set, comprising a cabinet body, and also comprising a cabinet door arranged on one side of the cabinet body, a thyristor element is arranged inside the cabinet body, one side of the thyristor element is fixedly connected to a radiator, the inner wall of the cabinet body is respectively fixedly connected to an electric heating plate and a driving motor, the output end of the driving motor is fixedly connected to a driving wheel, the outer side of the driving wheel is transmission-connected to a belt, the inner side of the belt is transmission-connected to a driven wheel, the bottom of the driven wheel is fixedly connected to a blowing fan, the top of the driven wheel is fixedly connected to a first rotating shaft rotating on the inner wall of the cabinet body, the bottom of the driving wheel is fixedly connected to a second rotating shaft, and the bottom end of the second rotating shaft is rotationally connected to a fan fixed to the inner wall of the cabinet body. A bearing at the top of the electric heating plate, a partition is fixedly connected to the inner wall of the cabinet, the inner wall of the partition is connected to an air suction duct, one end of the air suction duct is connected to a fan fixed to the inner wall of the cabinet, and one end of the fan is connected to an exhaust duct that runs through the cabinet; a temperature measuring mechanism is arranged in the cabinet for monitoring the temperature of the thyristor element, the temperature measuring mechanism includes a temperature detector fixed to one side of the cabinet door, an optical fiber is connected to the signal input interface of the temperature detector, one end of the optical fiber is fixedly connected to a temperature measuring probe, the temperature measuring probe is fixed at the center of the thyristor element, a communication interface line is connected to the signal input interface of the temperature detector, one end of the communication interface line is signal-connected to a monitor, and the monitor is fixed to one side of the cabinet door.

[0006] Preferably, a vertical plate is fixedly connected to the inner wall of the cabinet, and three mounting frames for mounting the thyristor elements are arranged on one side of the vertical plate.

[0007] Preferably, threaded holes are provided on the inner walls of the vertical plate and the mounting frame, and bolts are threadedly connected to the inner walls of the threaded holes.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0009] The utility model transforms the power optical fiber temperature measurement system of the excitation system of the generator set, effectively avoiding the failure of the excitation system caused by the overtemperature of the thyristor element. When a certain thyristor is found to be hot, intervention measures can be taken in advance, thereby reducing the failure of the thyristor element to break down due to excessive temperature, reducing the non-stop accidents of the generator set, and bringing economic benefits to the power generation industry. It solves the problem that the thyristor element of the power cabinet of the excitation system of the generator set is not equipped with a temperature monitoring element, and the thyristor element of the power cabinet often fails to heat up and breaks down due to poor heat dissipation in actual operation, which is particularly serious in summer. There is no effective monitoring method during the operation of the unit, which seriously affects the safe operation of the generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1A schematic structural diagram of a preferred embodiment of a temperature measuring device for safe operation of a generator set provided by the utility model;

[0011] Figure 2 A schematic diagram of the structure of the temperature measuring mechanism provided by the utility model;

[0012] Figure 3 A schematic diagram of the structure of the connection between the vertical plate and the mounting frame provided by the utility model;

[0013] Figure 4 The utility model is a schematic diagram of the structure of the blowing fan rotation.

[0014] In the figure: 1. cabinet; 2. cabinet door; 3. thyristor element; 4. radiator; 5. temperature measuring mechanism; 51. temperature detector; 52. optical fiber; 53. temperature measuring probe; 54. communication interface line; 55. monitor; 6. vertical plate; 7. mounting frame; 8. threaded hole; 9. bolt; 10. electric heating plate; 11. driving motor; 12. driving wheel; 13. belt; 14. driven wheel; 15. blowing fan; 16. first rotating shaft; 17. second rotating shaft; 18. bearing; 19. partition; 20. suction pipe; 21. fan; 22. exhaust pipe. DETAILED DESCRIPTION

[0015] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0016] See also Figure 1-4As shown, a temperature measuring device for safe operation of a generator set comprises a cabinet 1, and also comprises a cabinet door 2 arranged on one side of the cabinet 1, a thyristor element 3 is arranged inside the cabinet 1, a radiator 4 is fixedly connected to one side of the thyristor element 3, an electric heating plate 10 and a driving motor 11 are fixedly connected to the inner wall of the cabinet 1, and a driving wheel 12 is fixedly connected to the output end of the driving motor 11; a belt 13 is connected to the outer side of the driving wheel 12 for transmission, and a driven wheel 14 is connected to the inner side of the belt 13 for transmission, and a blowing fan 15 is fixedly connected to the bottom of the driven wheel 14; a first rotating shaft 16 rotating on the inner wall of the cabinet 1 is fixedly connected to the top of the driven wheel 14, and a second rotating shaft 17 is fixedly connected to the bottom of the driving wheel 12, and the bottom end of the second rotating shaft 17 rotates A bearing 18 fixed to the top of the electric heating plate 10 is connected; a partition 19 is fixedly connected to the inner wall of the cabinet 1, and an air suction pipe 20 is connected to the inner wall of the partition 19; one end of the air suction pipe 20 is connected to a fan 21 fixed to the inner wall of the cabinet 1, and one end of the fan 21 is connected to an exhaust pipe 22 that runs through the cabinet 1; a temperature measuring mechanism 5 for monitoring the temperature of the thyristor element 3 is arranged in the cabinet 1, and the temperature measuring mechanism 5 includes a temperature detector 51 fixed to one side of the cabinet door 2, an optical fiber 52 is connected to the signal input interface of the temperature detector 51, one end of the optical fiber 52 is fixedly connected to a temperature measuring probe 53, and the temperature measuring probe 53 is fixed at the center of the thyristor element 3, and the signal input interface of the temperature detector 51 is connected to a communication interface line 54, which is connected to the temperature of the thyristor element 3. One end of the signal interface line 54 is connected to a monitor 55, and the monitor 55 is fixed to one side of the cabinet door 2; the generator set can be installed by setting the cabinet 1, and the cabinet 1 can be sealed by setting the cabinet door 2. The center of the temperature probe 53 is fixed to the center of the thyristor element 3, so the temperature probe 53 can directly measure the temperature of each thyristor element 3. Each thyristor element 3 has a temperature probe 53 to measure the temperature of the thyristor element 3 in real time. The temperature probe 53 is connected to the signal input interface of the temperature detector 51 through the ST connector of the optical fiber 52. There are several thyristor elements 3, and there will be several corresponding input interfaces in the temperature detector 51 for collecting the temperature of each thyristor element 3. The temperature detector 51 is installed on the cabinet door 2. The temperature detector 51 is equipped with a real-time on-site display and setting device, and can be connected to the monitor 55 through the communication interface line 54. The temperature detector 51 can display the temperature of multiple thyristor components 3 in real time online and cyclically, and has the functions of temperature limit setting and temperature over-limit alarm. When the equipment is running, the temperature probe 53 converts the temperature signal of the thyristor component 3 into an optical signal, and transmits it to the temperature detector 51 through the optical fiber 52. The temperature detector 51 converts the optical signal into a digital quantity for processing and display, and sends an alarm signal according to the set temperature limit. It can also send the temperature signal of the thyristor component 3 to the monitor 55 through the communication interface line 54. The temperature probe 53 can directly contact the surface of the thyristor component 3 with high precision, with a resolution of 0.1℃, the measurement error is less than ±1℃, so that the cabinet 1 can maintain the online monitoring of the temperature of the thyristor element 3 at a certain accuracy level, by setting the electric heating plate 10 to generate heat energy through electric energy, by setting the driving motor 11 to drive the driving wheel 12 to rotate, by setting the driving wheel 12 to drive the belt 13 to rotate, by setting the belt 13 to drive the driven wheel 14 to rotate, by setting the driven wheel 14 to drive the blowing fan 15 to rotate, by setting the blowing fan 15 to blow the heat generated by the electric heating plate 10 to the inside of the cabinet 1 to dry the internal moisture By setting the first rotating shaft 16, the rotation stability of the driven wheel 14 can be improved; by setting the second rotating shaft 17, the rotation stability of the driving wheel 12 can be improved; by setting the bearing 18, the rotation stability of the second rotating shaft 17 can be improved; by setting the partition 19, the space inside the cabinet 1 can be divided; by setting the fan 21, the gas inside the cabinet 1 can be extracted through the suction pipe 20 and discharged to the outside of the cabinet 1 through the exhaust pipe 22, so that the air inside the cabinet 1 can be circulated; the suction pipe 20 and the exhaust pipe 22 are both provided with filters to prevent large dust from entering the cabinet 1. .

[0017] See also Figure 1 , Figure 3 and Figure 4 As shown, the inner wall of the cabinet 1 is fixedly connected with a vertical plate 6, and three mounting frames 7 for mounting the thyristor element 3 are arranged on one side of the vertical plate 6; the inner walls of the vertical plate 6 and the mounting frame 7 are provided with threaded holes 8, and the inner walls of the threaded holes 8 are threadedly connected with bolts 9; the mounting frame 7 can be connected by setting the vertical plate 6, and the thyristor element 3 can be installed by setting the mounting frame 7, and the mounting frame 7 and the vertical plate 6 can be easily installed and disassembled by setting the threaded holes 8 and the bolts 9.

[0018] Working principle: The worker fixes the center of the temperature probe 53 with the center of the thyristor element 3. The temperature probe 53 can directly measure the temperature of each thyristor element 3. Each thyristor element 3 has a temperature probe 53 to measure the temperature of the thyristor element 3 in real time. The temperature probe 53 is connected to the signal input interface of the temperature detector 51 through the ST connector of the optical fiber 52. There are several thyristor elements 3, and there will be several corresponding input interfaces in the temperature detector 51 to collect the temperature of each thyristor element 3. The temperature detector 51 is installed on the cabinet door 2. The temperature detector 51 has a real-time on-site display and setting device, and can be connected to the monitor 55 through the communication interface line 54. The temperature detector 51 can It can display the temperature of multiple thyristor components 3 in real time online and in a loop, and has the functions of temperature limit setting and temperature over-limit alarm. When the equipment is running, the temperature probe 53 converts the temperature signal of the thyristor component 3 into an optical signal, and transmits it to the temperature detector 51 through the optical fiber 52. The temperature detector 51 converts the optical signal into a digital quantity for processing and display, and sends an alarm signal according to the set temperature limit. It can also send the temperature signal of the thyristor component 3 to the monitor 55 through the communication interface line 54. The temperature probe 53 can directly contact the surface of the thyristor component 3 with high precision, with a resolution of 0.1°C and a measurement error of less than ±1°C. This can keep the cabinet 1's online monitoring of the temperature of the thyristor component 3 at a certain level of accuracy.

[0019] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A temperature measuring device for safe operation of a generator set, comprising a cabinet (1), characterized in that: Also includes: A cabinet door (2) is arranged on one side of the cabinet body (1); a thyristor element (3) is arranged inside the cabinet body (1); a radiator (4) is fixedly connected to one side of the thyristor element (3); an electric heating plate (10) and a drive motor (11) are respectively fixedly connected to the inner wall of the cabinet body (1); an output end of the drive motor (11) is fixedly connected to a driving wheel (12); an outer side of the driving wheel (12) is transmission-connected to a belt (13); an inner side of the belt (13) is transmission-connected to a driven wheel (14); a bottom of the driven wheel (14) is fixedly connected to a blower fan (15); the driven wheel (1 The top of the cabinet (4) is fixedly connected to a first rotating shaft (16) which rotates on the inner wall of the cabinet (1), the bottom of the driving wheel (12) is fixedly connected to a second rotating shaft (17), the bottom end of the second rotating shaft (17) is rotatably connected to a bearing (18) fixed to the top of the electric heating plate (10), the inner wall of the cabinet (1) is fixedly connected to a partition (19), the inner wall of the partition (19) is connected to an air suction pipe (20), one end of the air suction pipe (20) is connected to a fan (21) fixed to the inner wall of the cabinet (1), and one end of the fan (21) is connected to an exhaust pipe (22) which runs through the cabinet (1); A temperature measuring mechanism (5) is arranged in the cabinet (1) for monitoring the temperature of the thyristor element (3), the temperature measuring mechanism (5) comprising a temperature detector (51) fixed to one side of the cabinet door (2), an optical fiber (52) being connected to a signal input interface of the temperature detector (51), one end of the optical fiber (52) being fixedly connected to a temperature measuring probe (53), the temperature measuring probe (53) being fixed at the center of the thyristor element (3), a communication interface line (54) being connected to the signal input interface of the temperature detector (51), one end of the communication interface line (54) being signal-connected to a monitor (55), the monitor (55) being fixed to one side of the cabinet door (2).

2. A temperature measuring device for safe operation of a generator set according to claim 1, characterized in that: A vertical plate (6) is fixedly connected to the inner wall of the cabinet (1), and three mounting frames (7) for mounting the thyristor elements (3) are arranged on one side of the vertical plate (6).

3. A temperature measuring device for safe operation of a generator set according to claim 2, characterized in that: The inner walls of the vertical plate (6) and the mounting frame (7) are both provided with threaded holes (8), and the inner walls of the threaded holes (8) are threadedly connected with bolts (9).

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