Generator set partial discharge on-line monitoring device with protection function

Abstract

The utility model belongs to the technical field of generator set partial discharge monitoring, and particularly relates to a generator set partial discharge on-line monitoring device with a protection function, which comprises a supporting leg, a power generation structure is mounted at the top of the supporting leg, and monitoring structures are mounted on the left and right sides of the middle of the bottom surface in the power generation structure. Noise reduction structures are installed on the front face and the back face in the power generation structure, the monitoring structure comprises a damping unit and a supporting and limiting unit, the supporting and limiting unit is arranged at the bottom of the damping unit, the damping unit comprises a UHF sensor, a mounting plate is connected to the bottom of the UHF sensor, and a buffer pad is connected to the middle of the bottom face of the mounting plate. Damping rods are connected to the bottom face, close to the four corners, of the mounting plate. According to the generator set partial discharge on-line monitoring device with the protection function, through installation of the damping rod and the buffer pad, when vibration is generated in the use process of the generator set, effective damping and buffering are carried out on the UHF sensor, and therefore the UHF sensor is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of partial discharge monitoring of generator sets, in particular to an online partial discharge monitoring device for generator sets with a protection function. Background Art

[0002] A generator is a mechanical device that converts other forms of energy into electrical energy. It is driven by a turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy and transmits it to the generator, which then converts it into electrical energy. Generators are widely used in industrial and agricultural production, national defense, science and technology, and daily life.

[0003] Partial discharge (PD) can occur during generator operation. Initially, this PD has minimal energy and does not affect equipment operation. However, if PD continues over a long period of time, these small discharges can accumulate, gradually deteriorating insulation performance and ultimately leading to insulation breakdown, potentially causing a major power outage. Existing PD monitoring equipment suffers from low accuracy and poor long-term reliability.

[0004] As disclosed in Chinese patent CN212031638U, an online monitoring device for partial discharge of a generator set is proposed. It includes a first UHF sensor, a second UHF sensor, a third UHF sensor, an industrial computer, an ultrasonic sensor, a pre-signal amplifier, a filter, a post-signal amplifier, a computer detection terminal, and a signal conditioner. The first UHF sensor, the second UHF sensor, and the third UHF sensor are respectively arranged at the three-phase outlet bus of the generator. The first UHF sensor, the second UHF sensor, and the third UHF sensor are all connected to the signal conditioner. The output end of the signal conditioner is connected to the input end of the industrial computer. The output end of the ultrasonic sensor is provided with a pre-signal amplifier. By combining the UHF sensor with the ultrasonic sensor, the inside of the generator is comprehensively monitored, the accuracy of partial discharge monitoring of the generator is improved, the anti-interference performance during the monitoring process is better, the equipment structure is simple, and the cost is low.

[0005] However, in the process of using the partial discharge online monitoring device used in the prior art, since the monitoring equipment is a precision instrument and the generator will vibrate during use, long-term use will cause the monitoring sensor to become insensitive, thereby affecting the detection effect.

[0006] Therefore, we urgently need to provide a generator set partial discharge online monitoring device with protection function. Utility Model Content

[0007] The purpose of the utility model is to provide an online monitoring device for partial discharge of a generator set with a protective function, so as to solve the problem that the online monitoring device for partial discharge used in the prior art proposed in the above background technology is used. Since the monitoring equipment is a precision instrument and the generator will vibrate during use, long-term use will cause the monitoring sensor to become insensitive, thereby affecting the detection effect.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an online monitoring device for partial discharge of a generator set with a protective function, comprising a support leg, a power generation structure installed on the top of the support leg, monitoring structures installed on the left and right sides of the middle of the bottom surface of the power generation structure, and noise reduction structures installed on the front and back of the power generation structure.

[0009] The monitoring structure includes a shock absorbing unit and a support and limiting unit, and the support and limiting unit is arranged at the bottom of the shock absorbing unit.

[0010] The shock absorption unit includes a UHF sensor, the bottom of the UHF sensor is connected to a mounting plate, the middle of the bottom surface of the mounting plate is connected to a buffer pad, and the bottom surface of the mounting plate is connected to damping rods near the four corners.

[0011] Preferably, the support and limiting unit includes a mounting pad, a guide rod is installed in the middle of the top surface of the mounting pad close to the front and back ends, and a slider is connected inside the guide rod.

[0012] Preferably, the top of the slider is fixedly connected to the bottom surface of the mounting plate, the outer surface of the slider is slidably connected to the inner wall of a convex groove provided in the guide rod, the buffer pad is fixedly mounted in the middle of the top surface of the mounting pad, and the bottom end of the damping rod is connected to the top surface of the mounting pad. The mounting pad is made of rubber, and the damping rod is a spring-type damping rod commonly used in the art.

[0013] Preferably, the power generation structure includes a protective box, with hanging rings installed on the left and right ends of the front and back of the protective box near the top, a generator set installed in the middle of the bottom surface of the protective box, and a mounting groove connected to the bottom of the outer surface of the generator set.

[0014] Preferably, the bottom surface of the protection box is fixedly connected to the top of the support leg, the bottom surface of the mounting groove is fixedly connected to the inner bottom surface of the protection box, and the left and right ends of the middle of the inner bottom surface of the protection box are fixedly connected to the bottom surface of the mounting pad. The mounting groove can limit the generator set.

[0015] Preferably, the noise reduction structure includes a mounting rod, a clamping rod is fixedly installed at one end of the mounting rod, a noise reduction plate is connected inside the clamping rod, a circular hole is opened on the front of the noise reduction plate, and a mounting tube is installed inside the hole, and a spring is installed inside the mounting tube.

[0016] Preferably, the mounting rod is fixedly connected to the front and back of the protective box at one end away from the clamping rod, and the left and right ends of the outer surface of the noise reduction plate are clamped into the rectangular grooves provided in the clamping rod. The noise reduction plate is made of a noise reduction foam board with a plurality of honeycomb holes on the surface, and the mounting tube is made of soft rubber.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This generator set partial discharge online monitoring device with protective function, through the setting of the monitoring structure and the installation of the damping rod and the buffer pad, can effectively reduce the shock and buffer the UHF sensor when the generator set vibrates during use, thereby protecting the UHF sensor.

[0019] 2. This generator set partial discharge online monitoring device with protective function, through the setting of the noise reduction structure, the installation of two noise reduction plates, and the spring installed inside the installation tube, can consume the kinetic energy of air vibration caused by noise by using the vibration of the spring, thereby effectively reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall appearance of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0022] Figure 3 This is an enlarged view of the internal structure of the power generation monitoring structure of the utility model;

[0023] Figure 4 This is an enlarged view of the shock absorbing structure of the present utility model;

[0024] Figure 5 This is an enlarged view of the noise reduction structure of the utility model.

[0025] In the figure: 1. Support leg; 101. Protective box; 102. Lifting ring; 103. Generator set; 104. Mounting slot; 201. Mounting pad; 202. Guide rod; 203. Slider; 204. Mounting plate; 205. UHF sensor; 206. Damping rod; 207. Buffer pad; 301. Mounting rod; 302. Clamping rod; 303. Noise reduction plate; 304. Mounting tube; 305. Spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0028] Example 1:

[0029] A generator set partial discharge online monitoring device with a protective function comprises a support leg 1, a power generation structure is mounted on the top of the support leg 1, monitoring structures are mounted on the left and right sides of the middle of the bottom surface inside the power generation structure, and noise reduction structures are mounted on the front and back of the power generation structure.

[0030] The monitoring structure includes a shock-absorbing unit and a support and limit unit. The support and limit unit is located at the bottom of the shock-absorbing unit and includes a UHF sensor 205. The bottom of the UHF sensor 205 is connected to a mounting plate 204. A buffer pad 207 is connected to the middle of the bottom surface of the mounting plate 204. Damping rods 206 are connected to the bottom surface of the mounting plate 204 near the four corners. The support and limit unit includes a mounting pad 201. A guide rod 202 is installed in the middle of the top surface of the mounting pad 201, near the front and back ends. A slider 203 is connected to the inside of the guide rod 202.

[0031] The top of the slider 203 is fixedly connected to the bottom of the mounting plate 204, the outer surface of the slider 203 is slidingly connected to the inner wall of the convex groove opened inside the guide rod 202, the buffer pad 207 is fixedly installed in the middle of the top surface of the mounting pad 201, and the bottom end of the damping rod 206 is connected to the top surface of the mounting pad 201.

[0032] By setting up the monitoring structure and utilizing the installation of the damping rod 206 and the buffer pad 207 , when the generator set 103 generates vibration during use, the UHF sensor 205 can be effectively damped and buffered, thereby protecting the UHF sensor 205 .

[0033] When the UHF sensor 205 is used to monitor the partial discharge generated by the generator set 103, since the generator set 103 will vibrate during use, the damping rod 206 is used to reduce the shock, and the rubber material of the buffer pad 207 is used to reduce the shock, and the slider 203 is used to slide within the guide rod 202 to ensure the stability of the UHF sensor 205 during use.

[0034] Example 2:

[0035] Based on the first embodiment, the power generation structure includes a protective box 101. Lifting rings 102 are installed on the left and right ends of the front and back of the protective box 101 near the top. A generator set 103 is installed in the middle of the bottom surface of the protective box 101. The bottom surface of the outer surface of the generator set 103 is connected to the bottom. The bottom surface of the protective box 101 is fixedly connected to the top of the support leg 1. The bottom surface of the mounting groove 104 is fixedly connected to the bottom surface of the protective box 101. The left and right ends of the middle of the bottom surface of the protective box 101 are fixedly connected to the bottom surface of the mounting pad 201.

[0036] The noise reduction structure includes a mounting rod 301, with a clamping rod 302 fixedly mounted on one end. A noise reduction plate 303 is connected to the inside of the clamping rod 302. The front of the noise reduction plate 303 has a circular hole, inside which a mounting tube 304 is mounted. A spring 305 is installed inside the mounting tube 304. The end of the mounting rod 301, away from the clamping rod 302, is fixedly connected to the front and back of the protective box 101. The left and right ends of the outer surface of the noise reduction plate 303 engage with the rectangular grooves in the clamping rod 302.

[0037] By setting up the noise reduction structure, utilizing the installation of two noise reduction plates 303 and the spring 305 installed inside the mounting tube 304, the kinetic energy of the air vibration caused by the noise can be consumed by utilizing the vibration of the spring 305, thereby effectively reducing the noise.

[0038] During the use of the generator set 103, the installation groove 104 is used to limit the bottom of the generator set 103 to prevent the generator set 103 from sliding due to vibration during use. At the same time, since the generator set 103 will generate noise during use, thereby causing air vibration, the noise reduction plate 303 is installed to reduce the noise. At the same time, the spring 305 vibrates due to the energy generated by the noise and air vibration, thereby consuming the energy generated by the air vibration, thereby effectively reducing the noise generated during the use of the generator set 103.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. An online monitoring device for partial discharge of a generator set with a protective function, comprising a support leg (1), characterized in that: A power generation structure is installed on the top of the support leg (1), monitoring structures are installed on the left and right sides of the middle of the bottom surface of the power generation structure, and noise reduction structures are installed on the front and back of the power generation structure; The monitoring structure includes a shock absorbing unit and a support and limiting unit, and the support and limiting unit is arranged at the bottom of the shock absorbing unit; The shock absorption unit comprises a UHF sensor (205), the bottom of the UHF sensor (205) is connected to a mounting plate (204), the middle of the bottom surface of the mounting plate (204) is connected to a buffer pad (207), and the bottom surface of the mounting plate (204) is connected to damping rods (206) near the four corners.

2. The on-line monitoring device for partial discharge of a generator set with a protective function according to claim 1, characterized in that: The support and limiting unit comprises a mounting pad (201), a guide rod (202) is mounted on the middle of the top surface of the mounting pad (201) close to the front and back ends, and a slider (203) is connected inside the guide rod (202).

3. The on-line monitoring device for partial discharge of a generator set with a protective function according to claim 2, characterized in that: The top of the slider (203) is fixedly connected to the bottom surface of the mounting plate (204), the outer surface of the slider (203) is slidably connected to the inner wall of the convex sliding groove provided inside the guide rod (202), the buffer pad (207) is fixedly installed in the middle of the top surface of the mounting pad (201), and the bottom end of the damping rod (206) is connected to the top surface of the mounting pad (201).

4. The on-line monitoring device for partial discharge of a generator set with a protective function according to claim 1, characterized in that: The power generation structure comprises a protection box (101), wherein the front and back sides of the protection box (101) are provided with lifting rings (102) near the top and left and right ends thereof, a generator set (103) is provided in the middle of the bottom surface of the protection box (101), and the bottom of the outer surface of the generator set (103) is connected with a mounting groove (104).

5. The on-line monitoring device for partial discharge of a generator set with a protective function according to claim 4, characterized in that: The bottom surface of the protection box (101) is fixedly connected to the top of the support leg (1), the bottom surface of the installation groove (104) is fixedly connected to the inner bottom surface of the protection box (101), and the left and right ends of the middle of the inner bottom surface of the protection box (101) are fixedly connected to the bottom surface of the installation pad (201).

6. The on-line monitoring device for partial discharge of a generator set with a protective function according to claim 1, characterized in that: The noise reduction structure comprises a mounting rod (301), a clamping rod (302) is fixedly mounted on one end of the mounting rod (301), a noise reduction plate (303) is connected inside the clamping rod (302), a mounting tube (304) is mounted inside a circular hole provided on the front of the noise reduction plate (303), and a spring (305) is mounted inside the mounting tube (304).

7. The on-line monitoring device for partial discharge of a generator set with a protective function according to claim 6, characterized in that: The end of the mounting rod (301) away from the clamping rod (302) is fixedly connected to the front and back of the interior of the protection box (101), and the left and right ends of the outer surface of the noise reduction plate (303) are clamped inside the rectangular grooves of the clamping rod (302).

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