Low-power-consumption high-frequency partial discharge sensor device

Abstract

The invention discloses a low-power-consumption high-frequency partial discharge sensor device, and belongs to the field of natural gas generator monitoring. A low-power-consumption high-frequency partial discharge sensor device comprises a transparent cover, the upper end of the exterior of the transparent cover is wrapped with a heat dissipation frame, first transmission tubes are arranged on one side of the lower end of a second grounding metal strip and one side of the upper end of the wrapping frame, and second transmission tubes are arranged on the lower ends of the first transmission tubes and one side of the wrapping frame. The problems that an existing partial discharge sensor device is located at the upper end of a gas turbine generator set in the monitoring process, heat can cause continuous high temperature of an execution circuit connected to the upper end of the partial discharge sensor device and an internal signal processing unit, and the continuous high temperature affects the monitoring precision are solved. The extracted gas is transmitted through the first transmission pipe, the temperature of the gas is reduced through the low temperature of the refrigeration pipe, the low-temperature gas can enter the heat dissipation frame, and the transparent cover and the signal processing unit in the transparent cover are actively cooled.

Description

Technical Field

[0001] The invention relates to the field of natural gas generator monitoring, and in particular to a low-power consumption and high-frequency partial discharge sensor device. Background Art

[0002] The low-power high-frequency partial discharge sensor device for gas turbine generator sets is an advanced device dedicated to monitoring partial discharge phenomena in gas turbine generator sets. It uses high-frequency detection technology to capture and analyze the ultra-high frequency electromagnetic signals generated by partial discharge inside the equipment in real time, realize accurate monitoring of the insulation status of the equipment, and provide important data support for the maintenance and repair of power equipment.

[0003] A Chinese patent with publication number CN219871476U discloses a low-power ultra-high frequency partial discharge sensor device and monitoring system, including a base, a protective cover, a fixing rod, and a sensor. The upper surface of the base is screwed to the fixing rod, which overcomes the problem that the ultra-high frequency partial discharge sensor device in the prior art cannot monitor and detect faults and alarms in real time. The sensor also has an excellent monitoring angle and monitoring range, is easy to install, does not need to damage the conductor, and can be widely used in the construction of distribution stations and switchgear.

[0004] The partial discharge sensor device of the above patent is located at the upper end of the gas turbine generator set during the monitoring process. When the gas turbine generator set is started and running, it will quickly generate a large amount of heat. The heat will cause the execution circuit connected to the upper end of the partial discharge sensor device and the internal signal processing unit to maintain high temperature, and the continuous high temperature will affect the accuracy of monitoring. Summary of the invention

[0005] The purpose of the present invention is to provide a low-power high-frequency partial discharge sensor device, which transmits the extracted gas through a first transmission tube, and the low temperature of the refrigeration tube reduces the temperature of the gas. The low-temperature gas can enter the heat dissipation frame, actively cool the transparent cover and the internal signal processing unit, and the gas will be discharged from the second transmission tube. The gas will not be discharged at will and affect the accuracy of partial discharge sensing monitoring, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a low-power high-frequency partial discharge sensor device, comprising a transparent cover, the upper end of the outside of the transparent cover is wrapped with a heat dissipation frame, a second grounding metal strip is arranged on one side of the outside of the heat dissipation frame, a first grounding metal strip is arranged on the lower end of one side of the second grounding metal strip, the connection between the first grounding metal strip and the second grounding metal strip can be grounded to avoid affecting the monitoring accuracy of the partial discharge sensor device, a wrapping frame is arranged on the outside of the first grounding metal strip, a first transmission tube is arranged on the lower end of the second grounding metal strip and one side of the upper end of the wrapping frame, a second transmission tube is arranged on the lower end of the first transmission tube and one side of the wrapping frame, the first transmission tube can guide the gas extracted from the outside and transmit the extracted gas to the inside of the heat dissipation frame, and the heat and gas inside the heat dissipation frame will be discharged from the second transmission tube.

[0007] Preferably, a clamping bar is provided on one side of the first grounding metal bar, one end of the clamping bar and the second grounding metal bar are penetrated by a bidirectional threaded rod, and the outer portion of the bidirectional threaded rod is respectively threadedly matched with the second transmission tube and one end of the clamping bar, and the other end of the clamping bar and the second grounding metal bar is penetrated by a limiting rod, and the rotation of the bidirectional threaded rod can push the clamping bar and the second grounding metal bar, so as to push and clamp the clamping bar and the second grounding metal bar.

[0008] Preferably, the second grounding metal strip and the clamping strip are wrapped with a transmission frame on the outside, and the two sides inside the transmission frame are respectively rotatably connected to the first grounding metal strip with the bidirectional threaded rod and the limiting rod to fix the angle of the second grounding metal strip. The bidirectional threaded rod and the limiting rod are fixed by the transmission frame, thereby fixing and facilitating the fixing of the clamping strip and the second grounding metal strip.

[0009] Preferably, the two first transmission tubes and the two second transmission tubes are sealed and connected by a hose, the lower end of the transmission frame is clamped on one side of the hose, and a first motor is provided on the other side of the middle of the front end of the transmission frame. The pleated position of the hose can extend and contract due to stretching, so as to adapt to the push generated by the rotation of the bidirectional threaded rod.

[0010] Preferably, fixed barrels welded and fixed to the first grounding metal bar are provided on both sides of the lower end of one of the second transmission tubes near the wrapping frame, and fan blades are provided inside the fixed barrel. The rotation of the fan blades can extract external gas from the fixed barrel position and transmit the gas from the wrapping frame position to the inside of the first transmission tube.

[0011] Preferably, a filter is provided inside the fixed barrel, which can filter the extracted gas to prevent foreign matter from clogging the inside of the wrapping frame. The filter wraps and protects the blades, so that the blades can rotate continuously for a long time under the drive, and will not be directly contacted or collided with external foreign matter, thereby reducing damage to the blades and increasing the service life of the blades. This allows the blades to extract gas stably for a long time, realizes continuous supply of gas to the heat dissipation frame position and completes efficient heat dissipation, thereby ensuring the accuracy of discharge monitoring.

[0012] Preferably, a refrigeration pipe is longitudinally arranged in the middle of the wrapping frame, and a condenser welded and fixed to the refrigeration pipe is arranged at the front end of the wrapping frame. The activation of the condenser can actively reduce the temperature of the refrigeration pipe, and the refrigeration pipe can actively cool the gas flowing around it.

[0013] Preferably, the clamping bar and the second grounding metal bar are both welded with a bonding sheet on one side facing the first grounding metal bar, and the bonding sheet can expand the contact area between the clamping bar, the second grounding metal bar and the first grounding metal bar. The bonding sheet expands the contact area and thus improves the stability after clamping, which facilitates fixing the angle after the first motor is started and the second grounding metal bar is made perpendicular to the first grounding metal bar. The fixed and adjusted angle facilitates the stable operation of the signal processing unit in the transparent cover, and also directly improves the grounding conduction effect and the stability of the operation of the signal processing unit in the transparent cover.

[0014] Preferably, a transmission ring is arranged around the upper end of the interior of the heat dissipation frame, and a shunt pipe facing the transparent cover is arranged around the lower end of the transmission ring, and the shunt pipe, the transmission ring and the first transmission pipe are sealed and connected in sequence. Through the transmission of the transmission ring and the shunt of the shunt pipe, the low-temperature gas can be fully in contact with the transparent cover and the internal signal processing unit, thereby improving the cooling effect, and the gas is wrapped by the heat dissipation frame, which will not cause the air flow speed between the transparent cover and the monitoring position to be too fast due to heat dissipation, thereby avoiding the influence of excessive air flow speed on the monitoring accuracy.

[0015] Preferably, the calibers of the first transmission tube, transmission ring and diverter tube are gradually reduced. The air flow rate at the diverter tube outlet can be increased by gradually reducing the caliber. When the overall transmission volume of the gas inside the diverter tube remains unchanged, the heat dissipation effect can be improved by compressing the area of ​​the outlet, so that the low-temperature gas can quickly surround and contact the transparent cover area inside the heat dissipation frame, thereby avoiding the connection position between the heat dissipation frame and the first transmission tube being fixed, resulting in the low-temperature gas only being able to unilaterally contact a certain area of ​​the transparent cover inside the heat dissipation frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The heat generated during the monitoring process of the present invention will be wrapped by the heat dissipation frame, and the startup of the fixed barrel can extract external gas and actively transmit the gas from the first transmission tube to the heat dissipation frame, pushing the heat inside the heat dissipation frame to be discharged from the second transmission tube. During the entire heat dissipation process, no faster air flow will be generated at the lower end of the transparent cover, avoiding the impact of air flow on discharge monitoring. On the other hand, when the room temperature is high, the startup of the condenser can reduce the temperature at the position of the refrigeration tube, actively reduce the temperature transmitted to the inside of the heat dissipation frame, and improve the heat dissipation effect. Finally, when the first transmission tube transmits to the inside of the heat dissipation frame, the first transmission tube will transmit the gas through the transmission ring and be diverted by the shunt tube. The gas is fully transported to the surrounding area of ​​the upper end of the transparent cover through the surrounding shunt tube, and the temperature is fully reduced. The shunt tube with a diameter smaller than the first transmission tube increases the air flow rate, which will improve the heat exchange efficiency between the air and the surrounding environment, thereby further affecting the air temperature.

[0018] 2. When the signal processing unit inside the transparent cover of the present invention monitors the discharge of the lower end gas turbine generator set, the transmission and support of the bidirectional threaded rod can make the clamping bar and the second grounding metal bar move relative to each other, clamp and fix, wherein the lower end of the first grounding metal bar extends to the lower end of the ground, and the first grounding metal bar, the bonding sheet and the second grounding metal bar are all made of metal conductive materials, in order to establish a common reference potential, ensure that the sensor can accurately detect the local discharge signal, and reduce the error caused by the potential difference, so as to reduce the grounding impedance and potential electromagnetic interference. During the maintenance process, after the two bonding sheets lose their clamping of the first grounding metal bar through the rotation of the bidirectional threaded rod, the entire second grounding metal bar, the transparent cover and the signal processing unit inside the transparent cover can be driven by the first motor to flip and face the ground, which is convenient for maintenance and debugging by maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a stereoscopic diagram of the overall external structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A area;

[0021] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle B area;

[0022] Figure 4 It is a cross-sectional view of the internal structure of the heat dissipation frame of the present invention;

[0023] Figure 5 A schematic diagram of air flow trajectories inside the first transmission tube and the second transmission tube of the present invention;

[0024] Figure 6 For the present invention Figure 5 A partial enlarged view of the middle C area;

[0025] Figure 7 A cross-sectional view of the internal structure of the transmission frame of the present invention;

[0026] Figure 8 It is a schematic diagram of the second grounding metal strip after rotation of the present invention;

[0027] Fig. 9 It is a cross-sectional view of the internal structure of the fixed barrel of the present invention.

[0028] In the figure: 1. first grounding metal strip; 2. wrapping frame; 3. condenser; 4. transmission frame; 5. second grounding metal strip; 6. transparent cover; 7. heat dissipation frame; 8. first transmission pipe; 9. second transmission pipe; 10. fixed barrel; 11. filter screen; 12. hose; 13. first motor; 14. second motor; 15. transmission ring; 16. shunt pipe; 17. refrigeration pipe; 18. bidirectional threaded rod; 19. clamping strip; 20. bonding sheet; 21. limiting rod. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with specific embodiments.

[0030] Example 1

[0031] like Figure 1 As shown, a low-power high-frequency partial discharge sensor device of this embodiment includes a transparent cover 6, and a signal processing unit is provided at the upper end of the transparent cover 6. The signal processing unit is used to detect partial discharge phenomena in power equipment. This phenomenon is usually an early sign of insulation aging or damage. Partial discharge will generate high-frequency electromagnetic waves, which can be captured by the signal processing unit and converted into electrical signals;

[0032] Among them, the upper end of the outside of the transparent cover 6 is wrapped with a heat dissipation frame 7, and the heat dissipation frame 7 is connected to the middle position slot of the outside of the transparent cover 6. The heat can also be wrapped by the wrapping of the heat dissipation frame 7, which is convenient for efficient heat dissipation. A second grounding metal strip 5 is provided on one side of the outside of the heat dissipation frame 7, and a first grounding metal strip 1 is provided on the lower end of one side of the second grounding metal strip 5. The lower end of the first grounding metal strip 1 needs to be embedded in the soil at the lower end of the installation position during installation. The heat dissipation frame 7, the second grounding metal strip 5 and the first grounding metal strip 1 made of metal conductive materials are used to achieve support and grounding at the same time. Grounding can effectively suppress capacitive coupling, inductive coupling and resistive coupling, reduce or weaken interference, and improve the monitoring accuracy and anti-interference ability of the partial discharge sensor device:

[0033] In order to facilitate supporting the second grounding metal strip 5 and the heat dissipation frame 7 at one end, as shown in FIG. Figure 6 and Figure 7As shown, a clamping bar 19 is provided on one side of the first grounding metal strip 1, one end of the clamping bar 19 and the second grounding metal strip 5 is penetrated by a bidirectional threaded rod 18, and the other end of the clamping bar 19 and the second grounding metal strip 5 is penetrated by a limiting rod 21, and the outer portion of the bidirectional threaded rod 18 is respectively threadedly matched with the second transmission tube 9 and one end of the clamping bar 19, and a second motor 14 is provided on one end of the bidirectional threaded rod 18. After the second motor 14 is started and drives the bidirectional threaded rod 18 to rotate, the second grounding metal strip 5 and the clamping bar 19 are restricted by the limiting rod 21, so that the clamping bar 19 and the second grounding metal strip 5 move relative to each other, and the relative movement can clamp the first grounding metal strip 1, and after the clamping bar 19 and the second grounding metal strip 5 are separated, the second grounding metal strip 5 can be rotated;

[0034] like Figure 5 and Figure 7 As shown, the second grounding metal strip 5 and the clamping strip 19 are wrapped with a transmission frame 4, and the two sides of the transmission frame 4 are rotatably connected to the bidirectional threaded rod 18 and the limiting rod 21 respectively, and the support of the transmission frame 4 facilitates subsequent transmission and support for the second grounding metal strip 5;

[0035] like Figure 7 As shown, a first motor 13 is provided on the other side of the middle of the front end of the transmission frame 4. After the clamping strip 19 and the second grounding metal strip 5 are separated and lose clamping, the first motor 13 can drive the second grounding metal strip 5 and the heat dissipation frame 7 to rotate under the support of the wrapping frame 2, and the rotation facilitates the maintenance of the partial discharge sensor device;

[0036] Among them, the clamping strip 19 and the second grounding metal strip 5 are welded with a bonding sheet 20 on one side facing the first grounding metal strip 1. The bonding sheet 20 can expand the contact area with the first grounding metal strip 1 during the clamping process, and can improve the stability of clamping and fixing the second grounding metal strip 5;

[0037] In order to wrap and protect the first grounding metal strip 1 to prevent the first grounding metal strip 1 from being accidentally touched externally after conducting electricity, such as Figure 1 , Figure 5 and Figure 8 As shown, a wrapping frame 2 is provided on the outside of the first grounding metal strip 1, and one side of the wrapping frame 2 is fixedly connected to the lower end of the outer wall of the first motor 13 by bolts;

[0038] In order to avoid faster air flow at the lower end of the transparent cover 6 during heat dissipation, a first transmission tube 8 is provided at the lower end of the second grounding metal strip 5 and one side of the upper end of the wrapping frame 2, and a second transmission tube 9 is provided at the lower end of the first transmission tube 8 and one side of the wrapping frame 2. The gas inside the wrapping frame 2 is transmitted to the inside of the heat dissipation frame 7 through the first transmission tube 8, and the gas inside the heat dissipation frame 7 is discharged from the second transmission tube 9.

[0039] like Figure 1 , Figure 3 and Figure 8 As shown, the two first transmission tubes 8 and the two second transmission tubes 9 are sealedly connected by a hose 12, and the lower end of the transmission frame 4 is clamped on one side of the hose 12. The contraction of the hose 12 can facilitate the position adjustment of the second grounding metal strip 5 caused by the rotation of the bidirectional threaded rod 18, and the bending of the hose 12 can also cope with the bending caused by the start-up of the first motor 13;

[0040] A fixed barrel 10 is provided on both sides of the lower end of one of the second transmission tubes 9 close to the wrapping frame 2, and the fixed barrel 10 is welded and fixed to the first grounding metal strip 1. A fan blade is provided inside the fixed barrel 10. The rotation of the fan blade can extract external gas and actively transmit the gas to the fixed barrel 10 and the connected first grounding metal strip 1, so as to facilitate the subsequent cooling of the inside of the heat dissipation frame 7;

[0041] Among them, a refrigeration pipe 17 is longitudinally arranged in the middle of the wrapping frame 2, and a condenser 3 is arranged at the front end of the wrapping frame 2, and the condenser 3 is welded and fixed to the refrigeration pipe 17. The temperature of the refrigeration pipe 17 can be actively reduced by starting the condenser 3, and the low-temperature refrigeration pipe 17 can cool the gas flowing around, and the cooling is convenient to improve the heat dissipation speed of the heat dissipation frame 7;

[0042] Example 2

[0043] like Figure 2 As shown, in order to prevent foreign matter in the extracted gas from clogging the wrapping frame 2, a filter screen 11 is provided inside the fixed barrel 10, and the extracted gas is actively filtered by the filter screen 11 to prevent the inflow of foreign matter;

[0044] Example 3

[0045] In order to increase the flow rate of the exhaust gas from the first transmission pipe 8, Figure 4 As shown, a transmission ring 15 is arranged around the upper end of the interior of the heat dissipation frame 7, and a shunt pipe 16 facing the transparent cover 6 is arranged around the lower end of the transmission ring 15, and the shunt pipe 16, the transmission ring 15 and the first transmission pipe 8 are sealed and connected in sequence. The transmission from the first transmission pipe 8 to the transmission ring 15 and then to the shunt pipe 16 can gradually reduce the diameter during transmission, increase the air outlet speed of the lower end of the shunt pipe 16, and improve the heat dissipation capacity.

[0046] Working principle: When the device is erected and the partial discharge sensor device monitors the discharge of the gas turbine generator set at the lower end, the lower end of the first grounding metal strip 1 extends and is embedded in the soil on the ground, and the bolts penetrate the four corners of the lower end of the wrapping frame 2 and are embedded in the installation position, so that the wrapping frame 2 is wrapped and fixed to the outside of the first grounding metal strip 1, and the uppermost end of the first grounding metal strip 1 is clamped by the clamping strip 19 and the second grounding metal strip 5 to realize the suspension and fixation of the transparent cover 6 at one end of the second grounding metal strip 5. During the continuous operation, the signal processing unit inside the transparent cover 6 will continue to heat up due to external influences and its own operation, and the condenser 3 will be started. The condenser 3 transmits the low temperature to the inside of the wrapping frame 2 through the refrigeration pipe 17, and the fan blades inside the fixed barrel 10 rotate under the drive of electricity. The rotation of the fan blades can extract gas and make the gas The gas is filtered by the filter 11 and then transmitted to the surrounding of the refrigeration pipe 17 for cooling. The cooled gas is continuously transmitted and transmitted from the first transmission pipe 8 to the transmission ring 15. The transmission ring 15 diverts the internal gas through the diversion pipe 16 at the lower end and actively blows it around the signal processing unit at the upper end of the partial discharge sensor device. The blown gas will not flow and affect the monitoring of the partial discharge sensor device, but will be transmitted from the second transmission pipe 9 after being restricted by the heat dissipation frame 7 and discharged around the fixed barrel 10. When inspecting the transparent cover 6, the maintenance personnel do not need to climb up with the help of a ladder. After the second motor 14 is started and the two bonding sheets 20 are separated, the first motor 13 is started and drives the transparent cover 6 and the internal signal processing unit to rotate, and rotates with the output shaft of the first motor 13 as the center of the circle, and can actively approach the ground for maintenance personnel to inspect.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A low-power high-frequency partial discharge sensor device, comprising a transparent cover (6), characterized in that: The upper end of the outside of the transparent cover (6) is wrapped with a heat dissipation frame (7), a second grounding metal strip (5) is arranged on one side of the outside of the heat dissipation frame (7), a first grounding metal strip (1) is arranged on the lower end of one side of the second grounding metal strip (5), a wrapping frame (2) is arranged on the outside of the first grounding metal strip (1), a first transmission tube (8) is arranged on the lower end of the second grounding metal strip (5) and one side of the upper end of the wrapping frame (2), and a second transmission tube (9) is arranged on the lower end of the first transmission tube (8) and one side of the wrapping frame (2).

2. A low-power high-frequency partial discharge sensor device according to claim 1, characterized in that: A clamping bar (19) is provided on one side of the first grounding metal bar (1), and the clamping bar (19) and one end of the second grounding metal bar (5) are penetrated by a bidirectional threaded rod (18), and the outside of the bidirectional threaded rod (18) is respectively threadedly matched with the second transmission tube (9) and one end of the clamping bar (19), and the other end of the clamping bar (19) and the second grounding metal bar (5) are penetrated by a limiting rod (21).

3. A low-power high-frequency partial discharge sensor device according to claim 2, characterized in that: The second grounding metal strip (5) and the clamping strip (19) are wrapped with a transmission frame (4) on the outside, and the two sides inside the transmission frame (4) are rotatably connected to the bidirectional threaded rod (18) and the limiting rod (21) respectively.

4. A low-power high-frequency partial discharge sensor device according to claim 3, characterized in that: The two first transmission tubes (8) and the two second transmission tubes (9) are sealedly connected via a hose (12), the lower end of the transmission frame (4) is clamped on one side of the hose (12), and a first motor (13) is provided on the other side of the middle of the front end of the transmission frame (4).

5. A low-power high-frequency partial discharge sensor device according to claim 1, characterized in that: A fixing barrel (10) welded and fixed to the first grounding metal strip (1) is provided on both sides of the lower end of one of the second transmission tubes (9) close to the wrapping frame (2), and a fan blade is provided inside the fixing barrel (10).

6. A low-power high-frequency partial discharge sensor device according to claim 5, characterized in that: A filter screen (11) is arranged inside the fixed barrel (10).

7. A low-power high-frequency partial discharge sensor device according to claim 1, characterized in that: A refrigeration pipe (17) is longitudinally arranged in the middle of the wrapping frame (2), and a condenser (3) is welded and fixed to the refrigeration pipe (17) at the front end of the wrapping frame (2).

8. A low-power high-frequency partial discharge sensor device according to claim 3, characterized in that: The clamping strip (19) and the second grounding metal strip (5) are both welded with a bonding sheet (20) on one side facing the first grounding metal strip (1).

9. A low-power high-frequency partial discharge sensor device according to claim 1, characterized in that: A transmission ring (15) is arranged around the upper end of the heat dissipation frame (7), a shunt pipe (16) facing the transparent cover (6) is arranged around the lower end of the transmission ring (15), and the shunt pipe (16), the transmission ring (15) and the first transmission pipe (8) are sealed and connected in sequence.

10. A low-power high-frequency partial discharge sensor device according to claim 9, characterized in that: The calibers of the first transmission pipe (8), the transmission ring (15) and the diverter pipe (16) are gradually reduced.

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