Wireless oil state monitoring device for low-oil power equipment

Abstract

The utility model provides a wireless oil state monitoring device for low-oil power equipment. According to the monitoring device, an opening is formed in the bottom end of a protective shell; the sensor base is detachably arranged at the open end of the protective shell, and a protective cavity is defined between the sensor base and the protective shell; the monitoring assembly is arranged on the side, opposite to the protective shell, of the sensor base, and one end of the monitoring assembly is arranged on the sensor base. According to the utility model, the internal PCB is protected through the protective housing and the sensor base, and the external monitoring assembly is inserted into the low-oil electrical equipment, so that data acquisition is carried out on the state of an oil region or a gas region in the low-oil electrical equipment, and then data processing is carried out through the PCB; key parameters of a top oil region of the low-oil power equipment are monitored, and oil gas in operation of the low-oil power equipment without an oil taking port in the middle or with a narrow oil taking port is monitored.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment oil state monitoring technical field, specifically, relate to a kind of little oil class power equipment wireless oil state monitoring device. BACKGROUND

[0002] Little oil class equipment such as oil-paper insulation bushing, mutual inductor, coupling capacitor carries out internal insulation by filling insulating oil, the operation condition of this kind of equipment is harsh under the influence of multiple factors such as heat, and once internal gas generation occurs, it develops rapidly, and is easy to cause equipment failure, and seriously leads to explosion, so it is necessary to monitor the oil state of little oil class equipment in real time, and find latent fault in time to ensure the safe and stable operation of equipment.

[0003] At present, oil state monitoring device is installed in the middle oil outlet of equipment, and wired mode is used to monitor H2, pressure and other parameters in oil, but there is a certain proportion of little oil class equipment, and there is no oil outlet or the oil outlet is narrow in the middle, to realize gas generation monitoring during the operation of this kind of equipment, sensor can be installed in the external hole position of high-voltage side of equipment, and the state of top oil domain or gas domain is monitored, when overheating and insulation fault occur in equipment, hydrogen is generated in oil, and oil state parameters can be perceived in upper oil domain, and small molecules overflow after discharge in oil, reach the upper gas cavity, and the pressure of upper gas cavity changes, so the operation condition can also be monitored by installing sensing device on the top of equipment, the top of equipment is a high-voltage strong magnetic field area, and high requirements are required for the strong electromagnetic interference of sensor and structural design, and cable cannot be introduced from high-voltage side, so wireless structure must be used, and currently, there is no relevant technical research on wireless sensing device design suitable for strong electromagnetic field area at home and abroad, and there is no effective monitoring device product that can meet engineering application. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a little oil class power equipment wireless oil state monitoring device, to solve the problem that the middle of existing little oil class equipment has no oil outlet or the oil outlet is narrow, leading to monitoring difficulty.

[0005] The utility model provides a little oil class power equipment wireless oil state monitoring device, the monitoring device includes: protective shell, its bottom end has opening;Sensor base is set in the opening end of protective shell in a detachable mode, and the protective cavity is formed between the sensor base and the protective shell;Monitoring assembly is set on the side of the sensor base away from the protective shell, and one end is set on the sensor base, and the other end is used to extend to the inside of little oil class power equipment, to collect data of oil domain or gas domain in little oil class power equipment;PCB board is set in the protective cavity, and it is connected with the sensor.

[0006] Further, the wireless oil state monitoring device for the low-oil power equipment, the monitoring assembly comprises a monitoring probe rod arranged on one side of the sensor base, a connecting end of the monitoring probe rod is arranged on the sensor base, and a communicating end is used to extend to the inside of the low-oil power equipment to communicate with the low-oil power equipment; a sealing joint is arranged in the inside of the monitoring probe rod, and the sealing joint divides the monitoring probe rod into a monitoring area and a sealing protection area which are independent of each other and correspond to the communicating end and the connecting end of the monitoring probe rod respectively to seal the sealing protection area of the monitoring probe rod; and a sensor is arranged in the inside of the monitoring area to collect data of the oil area or gas area in the low-oil power equipment.

[0007] Further, the wireless oil state monitoring device for the low-oil power equipment, the sensor is one or any combination of a hydrogen sensor, a temperature and pressure sensor, and a humidity / micro water sensor.

[0008] Further, the wireless oil state monitoring device for the low-oil power equipment, a flexible guide belt is arranged in the monitoring area of the monitoring probe rod to support the sensor.

[0009] Further, the wireless oil state monitoring device for the low-oil power equipment, a lateral communicating hole communicating with the monitoring area is arranged on the side wall of the monitoring probe rod; the connecting end and the communicating end of the monitoring probe rod are both arranged in an open manner, and the communicating end of the monitoring probe rod is provided with a cap for bottom sealing.

[0010] Further, the wireless oil state monitoring device for the low-oil power equipment, a shielding plate is arranged on the sensor base, a shielding cavity is formed between the shielding plate and the sensor base, and the PCB board is arranged in the shielding cavity.

[0011] Further, the wireless oil state monitoring device for the low-oil power equipment, gaps are arranged between the PCB board and the sensor base and between the PCB board and the shielding plate.

[0012] Further, the wireless oil state monitoring device for the low-oil power equipment, support columns are arranged between the PCB board and the sensor base and between the PCB board and the shielding plate to support the PCB board and the shielding plate.

[0013] Further, the wireless oil state monitoring device for the low-oil power equipment, a power supply module is further arranged in the protection cavity to supply power to the PCB board; and an antenna is arranged on the PCB board, penetrates through the shielding plate and extends to the side of the shielding plate away from the sensor base.

[0014] Further, the wireless oil state monitoring device for the low-oil power equipment has the ABS plastic shell as the protective shell; and a sealing ring is arranged between the protective shell and the sensor base.

[0015] The wireless oil state monitoring device for the low-oil power equipment protects the internal PCB through the protective shell and the sensor base, inserts the external monitoring assembly into the internal part of the low-oil power equipment to collect data of the oil area or the gas area in the low-oil power equipment, and then processes the data through the PCB to monitor the key parameters of the oil area at the top of the low-oil power equipment, so as to monitor the oil and gas in the running of the low-oil power equipment without the oil outlet or with a narrow oil outlet in the middle part, especially when the device is installed in the external hole position of the high-voltage side of the equipment to monitor the gas state of the oil area at the top, so that the key parameters of all points of the low-oil power equipment are monitored, the equipment has the oil state monitoring means, the safe and stable operation of the equipment is guaranteed, and the problem of difficult monitoring caused by the lack of oil outlet or the narrow oil outlet in the middle part of the existing low-oil equipment is solved. In addition, the device has a compact structure and avoids interference with the installation and use of other parts.

[0016] Further, the monitoring parameter threshold value can be determined to provide the low-oil equipment without the oil state monitoring condition in the middle part with the monitoring means, the wireless hydrogen, temperature, pressure and humidity sensing technology without external power supply and with anti-electromagnetic interference is researched, the wireless oil state monitoring device for the low-oil power equipment has the characteristics of low power consumption, strong signal and anti-electromagnetic interference, can monitor the key parameters of the oil area at the top of the low-oil equipment, and can be wirelessly monitored without external power supply, so as to facilitate the installation and use of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to be limiting in any respect. In the drawings, like reference numerals refer to like structures throughout the several views, and in which:

[0018] Figure 1 A structure schematic view of the wireless oil state monitoring device for the low-oil power equipment provided by the embodiments of the present application is shown in the figure;

[0019] Figure 2 A structure schematic view of the low-oil power equipment provided by the embodiments of the present application is shown in the figure. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] See also Figure 1 , which is a schematic diagram of the structure of the wireless oil status monitoring device for oil-poor power equipment provided by the embodiment of the utility model. As shown in the figure, the monitoring device 100 includes: a protective housing 1, a sensor base 2, a monitoring component 3 and a PCB board 4; wherein,

[0022] The bottom end of the protective housing 1 has an opening to facilitate the removal and assembly of internal components. Specifically, the protective housing 1 can be a plastic housing to ensure that wireless communication is not blocked and has a certain hardness for protection. In this embodiment, the protective housing 1 is made of ABS plastic.

[0023] The sensor base 2 is detachably mounted on the open end of the protective housing 1, and a protective cavity is formed between the sensor base 2 and the protective housing 1. Specifically, the sensor base 2 is adapted to the opening of the protective housing 1 and is mounted on the open end of the protective housing 1 to seal the open end of the protective housing 1. The two are arranged to form a protective cavity, so that the PCB board 4 can be sealed within the protective cavity. In this embodiment, a sealing ring 5 may be provided between the sensor base 2 and the protective housing 1 to seal the gap between them, thereby further ensuring the sealing of the protective cavity. The sealing ring 5 may be an O-ring.

[0024] The monitoring component 3 is arranged on the side of the sensor base 2 facing away from the protective housing 1 (eg Figure 1 right side as shown), and one end (as Figure 1 The left end shown in FIG) is arranged on the sensor base 2, and the other end (as shown in FIG) is arranged on the sensor base 2. Figure 1 The right end as shown in the figure) is used to extend into the interior of the oil-poor power equipment to collect data on the oil or gas domain status in the oil-poor power equipment. Specifically, the monitoring component 3 is arranged outside the protective cavity, and the fixed end of the monitoring component 3 (as shown in the figure) is used to extend into the interior of the oil-poor power equipment to collect data on the oil or gas domain status in the oil-poor power equipment. Figure 1The left end of the monitoring assembly 3 is fixedly connected with the sensor base 2, and the other end can extend from the top hole of the oil-based power equipment to the inside of the oil-based power equipment to collect data of the oil or gas state in the oil-based power equipment, for example, to collect data of one or more combinations of hydrogen content, temperature and pressure, humidity / micro water, etc., to realize monitoring of the monitoring device 100. In this embodiment, the fixed end of the monitoring assembly 3 and the sensor base 2 can be connected through a mounting adapter, wherein the monitoring assembly 3 and the mounting adapter can be connected as a whole structure and are integrally installed on the sensor base 2.

[0025] The PCB board 4 is arranged in the protection cavity and is connected with the monitoring assembly 3, for data processing of the data collected by the monitoring assembly 3, to realize monitoring of the oil or gas state in the oil-based power equipment. Specifically, the PCB board 4 is arranged in the protection cavity and is connected with the monitoring assembly 3, and the two can be connected through a cable 31 to realize signal transmission between the two, and then the data collected by the monitoring assembly 3 is processed by the PCB board 4. In this embodiment, the PCB board 4 can be a wireless PCB board, that is, the signal can be transmitted to the terminal through wireless transmission.

[0026] In this embodiment, the PCB board 4 can be installed with a wireless communication module, a power module and a data processing module, which are main components susceptible to strong electromagnetic interference and must be completely shielded while ensuring normal operation. To avoid interference signals from interfering with the electromagnetic interference of the PCB board 4, preferably, the sensor base 2 is provided with a shielding plate 21, and a shielding cavity is formed between the shielding plate 21 and the sensor base 2. The PCB board 4 is arranged in the shielding cavity to be electromagnetically shielded by the shielding plate 21 and the sensor base 2. Specifically, the sensor base 2 is a seat structure with one end open and hollow, and the open end of the protection shell 1 is closed by the closed end. The PCB board 4 is embedded in the sensor base 2, and the sensor base 2 is made of 316L steel, which can well realize electromagnetic shielding of the lower end surface of the PCB board 4. The side of the PCB board 4 away from the sensor base 2 (e.g. Figure 1The left side as shown) is also provided with a shielding plate 21 made of 316L steel material for electromagnetic shielding of the upper end surface of the PCB 4. In this embodiment, in order to avoid damage or short circuit of the components on the PCB 4, preferably, the PCB 4 has a gap between the sensor base 2 and the shielding plate 21 respectively, to avoid damage of the PCB 4 by the sensor base 2 and the shielding plate 21. Among them, the PCB 4 is provided with a support column 22 between the sensor base 2 and the shielding plate 21 respectively, for supporting the PCB 4 and the shielding plate 21, that is, the bottom plate of the sensor base 2 is provided with a support column 22, the PCB 4 is supported on the support column 22 on the bottom plate of the sensor base 2, and the upper side of the PCB 4 is also provided with a support column 22, the shielding plate 21 is supported on the support column 22 on the upper side of the PCB 4, thereby ensuring that the PCB 4 has a gap between the sensor base 2 and the shielding plate 21 respectively; of course, the PCB 4 and the shielding plate 21 can also be connected with the support column 22 to realize the fixation of the position. Among them, the support column 22 can be a copper stud, or other support column, which is not limited in this embodiment.

[0027] In this embodiment, the PCB 4 can be connected with an antenna 41 to realize wireless transmission, of course, wireless transmission can also be realized by other means, which is not limited in this embodiment. In order to ensure that the antenna 41 realizes wireless transmission, preferably, the antenna 41 can pass through the shielding plate 21 or pass through the gap between the shielding plate 21 and the sensor base 2, and extend to the outside of the shielding cavity, that is, extend to the upper side of the shielding plate 21 (such as Figure 1 the left side as shown).

[0028] Referring to Figure 1 , the protection cavity is also provided with a power supply module 6 for supplying power to the PCB 4. Specifically, the power supply module 6 can be clamped on the sensor base 2 by the fixing clamp 7 to realize the fixation of the power supply module 6. Among them, the fixing clamp 7 is two arc-shaped clamps which are butted, one end can be fixed on the shielding plate 21, and the other end is connected by a connecting bolt to clamp the power supply module 6 between the two arc-shaped clamps to ensure the fixation of the power supply module 6; the fixing clamp 7 and the shielding plate 21 can be an integral structure, or can be connected and fixed by other means, which is not limited in this embodiment. In this embodiment, the power supply module 6 can be a low-power supply battery, a solar power supply module or an induction power module.

[0029] Referring to Figure 1 , the monitoring assembly 3 comprises a monitoring probe 32, a sensor 33 and a sealing joint 34; wherein the monitoring probe 32 is placed on one side of the sensor base 2 (such as Figure 1 the right side as shown), and the connecting end (such as Figure 1 the left end as shown) of the monitoring probe 32 is arranged on the sensor base 2, and the communication end (such asFigure 1 The right end of the monitoring probe 32 is used to extend to the inside of the low-oil power equipment to communicate with the low-oil power equipment; a sealing joint 34 is arranged in the inside of the monitoring probe 32, and the sealing joint 34 divides the monitoring probe 32 into a monitoring area and a sealing protection area which correspond to the communication end and the connection end of the monitoring probe 32 respectively to seal the sealing protection area of the monitoring probe 32; and a sensor 33 is arranged in the inside of the monitoring area to collect data of the oil or gas state in the low-oil power equipment.

[0030] Specifically, the monitoring probe 32 is a rod-shaped structure with both ends open and the inside hollow, which can be made of 316L steel. The connection end of the monitoring probe 32 can be inserted and fixed on the sensor base 2, so that the cable 31 in the inside of the monitoring probe 32 can extend from the connection end to the shielding cavity in the sensor base 2 and be connected with the PCB 4. The inside of the monitoring probe 32 is provided with the sealing joint 34 to divide the inside of the monitoring probe 32 into two independent areas, i.e., the monitoring area and the sealing protection area which correspond to the communication end and the connection end of the monitoring probe 32 respectively. That is, the monitoring area communicates with the low-oil power equipment, and the sealing protection area is sealed and isolated from the monitoring area by the sealing joint 34. The sealing protection area of the monitoring probe 32 is sealed by the sealing joint 34, so as to prevent the gas or oil in the low-oil power equipment from entering the sealing protection area and the shielding cavity and realize the sealing of the oil layer. The sensor 33 is arranged in the monitoring area, and the side wall of the monitoring probe 32 is provided with a lateral communication hole 321 which communicates with the monitoring area. The gas or oil in the low-oil power equipment enters the monitoring area from the communication hole 321, and then the sensor 33 in the monitoring area collects data of the oil or gas state in the low-oil power equipment. In this embodiment, the sensor 33 can be one or any combination of a hydrogen sensor, a temperature and pressure sensor, and a humidity / micro-water sensor. In this embodiment, the communication end of the monitoring probe 32 is provided with a cap 35 for bottom sealing to protect the sensor 33. The monitoring probe 32 can be integrally inserted into the low-oil power equipment and top-sealed by the sealing joint 34. The monitoring probe 32 and the mounting adapter can be connected as an integral structure and integrally mounted on the sensor base 2.

[0031] Continuing to refer to Figure 1A flexible guide belt 36 is provided within the monitoring area of ​​the monitoring probe 32 to support the sensor 33. Specifically, the flexible guide belt 36 can be connected to the inner wall of the monitoring probe 32 via a support plate 37. For example, the support plate 37 is supported and fixed to the inner wall of the monitoring probe 32. Both ends of the flexible guide belt 36 can be fixedly mounted on the support plate 37 to support and fix the flexible guide belt 36 via the support plate 37. The sensor 33 can be fixed to the flexible guide belt 36 by bonding or by other means. Of course, the flexible guide belt 36 can also be fixedly mounted on the sealing joint 34. In this embodiment, there is no limitation on the fixing method of the flexible guide belt 36.

[0032] See also Figure 2 , which is a structural schematic diagram of the transformer bushing provided by an embodiment of the present utility model. As shown in the figure, the transformer bushing 200 may be provided with an oil filling port 201, and the wireless oil status monitoring device for oil-poor power equipment is detachably mounted at the oil filling port 201. The transformer bushing 200 may be a ±66kV oil-immersed transformer bushing, or other bushings, and is not limited in this embodiment. The middle flange of this type of bushing does not have an oil extraction port, and the top of the bushing is provided with an oil filling port 201, which is sealed with an M6 threaded cover. The wireless oil status monitoring device for oil-poor power equipment can be installed at the oil filling port 201 using an integrated adapter. The power supply module 6 can use a high-efficiency lithium battery, and the sensor 33 uses a hydrogen and temperature and pressure sensor according to the requirements of the on-site application. The monitoring probe 32 penetrates into the gas space at the top of the bushing to collect, transmit, process and analyze the hydrogen, temperature and pressure data of the top gas space.

[0033] In summary, the wireless oil status monitoring device for low-oil power equipment provided in this embodiment protects the internal PCB board through a protective shell and a sensor base, and is inserted into the interior of the low-oil power equipment through an external monitoring component to collect data on the status of the oil or gas domain in the low-oil power equipment, and then processes the data through the PCB board to monitor the key parameters of the top oil domain of the low-oil power equipment, and realize the monitoring of oil and gas in the operation of low-oil power equipment with no oil extraction port in the middle or a narrow oil extraction port. In particular, the device is installed at the external hole position on the high-voltage side of the equipment to monitor the gas status of the top oil domain, and realize the monitoring of key parameters of all points of the low-oil power equipment, so that this type of equipment has an oil status monitoring means, and realizes the escort for the safe and stable operation of this type of equipment, and solves the problem of monitoring difficulties caused by the lack of oil extraction port or narrow oil extraction port in the middle of existing low-oil equipment. In addition, the device has a compact structure and avoids interference with the installation and use of other components.

[0034] Further, the monitoring parameter threshold can be determined, so that the little-oil type equipment without oil state monitoring condition has monitoring means, and the wireless hydrogen, temperature, pressure and humidity sensing technology resistant to electromagnetic interference is researched, the wireless oil state monitoring device of the little-oil type power equipment has the characteristics of low power consumption, strong signal and resistance to electromagnetic interference, and the key parameter monitoring of the top oil domain of the little-oil type equipment can be realized, and the device can be wirelessly monitored without external power supply, so that the device is convenient to use and install.

[0035] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore cannot be understood as a limitation of the present application.

[0036] In addition, it should be further pointed out that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Therefore, if these modifications and variations of the present application fall within the scope of the claims of the present application and the equivalent technology, the present application also intends to include these modifications and variations.

Claims

1. A wireless oil condition monitoring device for low oil class electrical equipment, characterized by, The utility model relates to a kind of wireless oil state monitoring device for low-oil power equipment, including: Protective shell, the bottom end has opening; Sensor base is detachably arranged in the opening end of protective shell, and the protective cavity is formed between the sensor base and the protective shell; Monitoring assembly is arranged on the side of the sensor base away from the protective shell, and one end is arranged on the sensor base, and the other end is used to extend to the inside of the low-oil power equipment to collect data in oil domain or gas domain state in low-oil power equipment; PCB board is arranged in the protective cavity, which is connected with the sensor.

2. The wireless oil condition monitoring device for low oil-filled electrical equipment according to claim 1, characterized by, The monitoring assembly includes: Monitoring probe rod is placed on the side of the sensor base, and the connecting end of the monitoring probe rod is arranged on the sensor base, and the communication end is used to extend to the inside of the low-oil power equipment to communicate with the low-oil power equipment; Sealing joint is arranged in the monitoring probe rod, and the sealing joint divides the monitoring probe rod into independent monitoring area and sealing protection area, which corresponds to the communication end and the connecting end of the monitoring probe rod respectively, to seal the sealing protection area of the monitoring probe rod; Sensor is arranged in the monitoring area, which is used to collect data in oil domain or gas domain state in low-oil power equipment.

3. The wireless oil condition monitoring device for low oil-filled electric equipment according to claim 2, characterized by The sensor is one or any combination of hydrogen sensor, temperature and pressure sensor, humidity / micro water sensor.

4. The wireless oil state monitoring device for low-oil power equipment according to claim 2, wherein: A flexible guide strip is arranged in the monitoring area of the monitoring probe rod to support the sensor.

5. The wireless oil state monitoring device for low-oil power equipment according to claim 2, wherein: A lateral communication hole is arranged on the side wall of the monitoring probe rod to communicate with the monitoring area; The connecting end and the communication end of the monitoring probe rod are both arranged in an open manner, and the communication end of the monitoring probe rod is provided with a cap to seal the bottom.

6. The wireless oil state monitoring device for low-oil power equipment according to any one of claims 1 to 5, wherein: A shielding plate is arranged on the sensor base, and a shielding cavity is formed between the shielding plate and the sensor base, and the PCB board is arranged in the shielding cavity.

7. The wireless oil state monitoring device for low-oil power equipment according to claim 6, wherein: The PCB board has a gap between the sensor base and the shielding plate.

8. The wireless oil state monitoring device for low-oil power equipment according to claim 6, wherein: Supporting columns are arranged between the PCB board and the shielding plate to support the PCB board and the shielding plate.

9. The wireless oil state monitoring device for low-oil power equipment according to claim 6, wherein: A power supply module is further arranged in the protective cavity to supply power to the PCB board; An antenna is arranged on the PCB board, which penetrates through the shielding plate and extends to the side of the shielding plate away from the sensor base.

10. The wireless oil condition monitoring device for low-oil power equipment according to any one of claims 1 to 5, characterized in that, the protective shell is an ABS type plastic shell; a sealing ring is arranged between the protective shell and the sensor base.

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