Vibration detection device for on-load tap-changer

Abstract

The utility model discloses an on-load tap-changer vibration detection device, which comprises a lower concentric-square-shaped seat and steel seats at the corners of the top end of the lower concentric-square-shaped seat, the top ends of the four steel seats are provided with an upper concentric-square-shaped seat, and the corners of the top end of the upper concentric-square-shaped seat are respectively provided with an auxiliary elastic supporting structure. A supporting table is installed at the movable end of the auxiliary elastic supporting structure, a protruding plate is fixed to the outer wall of one side of the auxiliary elastic supporting structure, a pressure sensor is installed on one side of the bottom end of the protruding plate, and sliding rods are slidably installed on the two sides of the top of the upper concentric-square-shaped base. Vibration detection in the vertical direction is introduced, a user is helped to judge the vertical jumping condition of the on-load tap-changer, vibration abnormities in the vertical direction, such as mechanical looseness, internal damage or stress concentration and the like, can be captured, and more comprehensive equipment health state evaluation is provided for the user.

Description

Technical Field

[0001] The utility model relates to the technical field of on-load tap changer detection, in particular to an on-load tap changer vibration detection device. Background Art

[0002] On-load tap changers play a key role in power systems. They have multiple functions such as tapping, disconnecting, overload protection and automatic switching. By switching different tap positions of the power supply, they allow the load to be connected to different voltage levels to adapt to different load requirements and improve the flexibility of the power system. Its internal structure principle includes main switches, tap changers, overload protection devices and control systems. During the operation of the on-load tap changer, the purpose of vibration detection of the on-load tap changer is to ensure the normal operation and safety performance of the switch. By monitoring the vibration of the switchgear, abnormal conditions can be discovered in advance, potential failure risks can be warned, and equipment availability and reliability can be maintained. The structure of this type of detection device includes a vibration sensor, a signal processing unit, a data acquisition system, a monitoring system and a user interface. The working principle is to measure vibration through a sensor, transmit data to a monitoring system, analyze the data and generate an alarm to help maintain the normal operation of the equipment. For example, the vibration detection device of the on-load tap changer disclosed in the authorization announcement number CN202793577U includes a column fixed to the ground, a lever support is arranged on the column, a lever is pivotally connected to the lever support, a probe foot is arranged on one side of one end of the lever, a spring is arranged on the other side of the probe foot relative to the lever, the other end of the spring is fixed on the column, and a vibration detector for converting vibration into an electrical signal is arranged on the other side of the lever. During use, this technical solution mainly detects the lateral vibration of the on-load tap changer during operation, and it is difficult to reflect the vibration of the on-load tap changer in the vertical direction, that is, the on-load tap changer is unstable in installation, mechanically loose, internally damaged or stress concentrated, etc., which may mainly manifest as vibration in the vertical direction. Only focusing on the horizontal vibration of the on-load tap changer is difficult to provide the staff with a comprehensive equipment health status. Utility Model Content

[0003] The utility model aims to provide an on-load tap changer vibration detection device, which can feedback the vibration of the on-load tap changer in the vertical direction, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a vibration detection device for an on-load tap changer, comprising a lower round-shaped seat and a steel seat at the top corner position of the lower round-shaped seat, an upper round-shaped seat is installed at the top of the four steel seats, and a secondary elastic support structure is installed at the corner position of the top of the upper round-shaped seat, and a support table is installed at the movable end of the secondary elastic support structure, a convex plate is fixed on the outer wall of one side of the secondary elastic support structure, and a pressure sensor is installed on one side of the bottom end of the convex plate, sliding rods are slidably installed on both sides of the top of the upper round-shaped seat, and the sliding rods are located directly below the pressure sensor, a main elastic support structure is installed at the top of the lower round-shaped seat, and a pressing table is installed on the movable end of the main elastic support structure, the top of the pressing table is fixedly connected to the bottom end of the supporting table, and a lever support structure is installed on both sides of the bottom of the lower round-shaped seat, and the two movable ends of the lever support structure are respectively in contact with the bottom end of the sliding rod and the bottom end of the pressing table.

[0005] Preferably, the auxiliary elastic support structure includes an outer column fixed at the top corner of the upper round seat, and an inner column slidably installed inside the outer column, the top of the inner column is fixedly connected to the bottom end of the support platform, and a secondary support spring is installed at the bottom of the outer column, the top of the secondary support spring is fixedly connected to the bottom end of the inner column, and the convex plate is fixed on the outer wall of one side of the outer column.

[0006] Preferably, guide pillars are installed on both sides of the bottom end of the support platform, and the bottom ends of the guide pillars pass through the outside of the upper circular seat and are fixedly connected to the top end of the press platform.

[0007] Preferably, the main elastic support structure is a guide column fixed on both sides of the top of the lower round seat, the top of the guide column is fixedly connected to the bottom of the upper round seat, the press platform is slidably mounted on the two guide columns, and the surface of the guide column below the press platform is covered with a main support spring.

[0008] Preferably, the lever support structure is a vertical plate fixed on both sides of the top of the lower circular seat, and a main shaft rotatably mounted on the surface of the vertical plate, a turntable is fixed on the surface of the main shaft, and permanent magnets are fixed on both side outer walls of the turntable.

[0009] Preferably, a first boss is fixed to one end of the slide rod close to the permanent magnet, and a second boss is installed on the outer wall of the press platform close to the permanent magnet, and the lower surfaces of the first boss and the second boss are magnetically attracted to the upper surfaces of the two permanent magnets respectively.

[0010] Compared with the prior art, the beneficial effect of the utility model is that the vibration detection device of the on-load tap changer introduces vibration detection in the vertical direction, which helps equipment operators and maintenance personnel to obtain comprehensive vibration data, helps to capture vibration anomalies in the vertical direction, such as mechanical looseness, internal damage or stress concentration, and provides users with a more comprehensive equipment health status assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the main cross-sectional structure of the auxiliary elastic support structure of the utility model;

[0013] Figure 3 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 4 It is a three-dimensional structural schematic diagram of the utility model;

[0015] In the figure: 1. lower circular seat; 101. vertical plate; 102. main shaft; 103. turntable; 104. permanent magnet; 2. upper circular seat; 201. guide column; 202. main support spring; 3. steel seat; 4. auxiliary elastic support structure; 401. outer column; 402. inner column; 403. auxiliary support spring; 5. support platform; 6. convex plate; 7. pressure sensor; 8. sliding rod; 9. first convex column; 10. guide column; 11. press table; 12. second convex column. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-4 , the utility model provides an embodiment: a vibration detection device for an on-load tap changer, comprising a lower round-shaped seat 1 and a steel seat 3 at the top corner position of the lower round-shaped seat 1, an upper round-shaped seat 2 is installed on the top of the four steel seats 3, a secondary elastic support structure 4 is installed at the top corner position of the upper round-shaped seat 2, and a support platform 5 is installed at the movable end of the secondary elastic support structure 4, a convex plate 6 is fixed on the outer wall of one side of the secondary elastic support structure 4, and a pressure sensor 7 is installed on one side of the bottom end of the convex plate 6, a slide bar 8 is slidably installed on both sides of the top of the upper round-shaped seat 2, and the slide bar 8 is located directly below the pressure sensor 7, a main elastic support structure is installed on the top of the lower round-shaped seat 1, and a press table 11 is installed on the movable end of the main elastic support structure, and the on-load tap changer to be detected is installed on the top of the support platform 5, at this time, the upward supporting elastic force of the main elastic support structure and the secondary elastic support structure 4 is equal to the gravity of the on-load tap changer;

[0018] The top of the pressing platform 11 is fixedly connected to the bottom of the supporting platform 5, and guide pillars 10 are installed on both sides of the bottom of the supporting platform 5. The bottom ends of the guide pillars 10 penetrate the outside of the upper round seat 2 and are fixedly connected to the top of the pressing platform 11. The on-load tap changer forces the supporting platform 5 and the guide pillars 10 to move downward due to the vertical vibration. Then, the pressing platform 11 presses the main elastic support structure under the vertical vibration of the on-load tap changer, the supporting platform 5, the guide pillars 10 and other components, so that the main elastic support structure is in a compressed state.

[0019] Lever support structures are installed on both sides of the bottom of the lower circular seat 1. The two movable ends of the lever support structure are in contact with the bottom ends of the slide bar 8 and the bottom ends of the press table 11 respectively. The lever support structure is a vertical plate 101 fixed on both sides of the top of the lower circular seat 1, and a main shaft 102 rotatably installed on the surface of the vertical plate 101. A turntable 103 is fixed on the surface of the main shaft 102. Permanent magnets 104 are fixed on the outer walls of both sides of the turntable 103.

[0020] A first protrusion 9 is fixed to one end of the slide bar 8 close to the permanent magnet 104, and a second protrusion 12 is installed on the outer wall of the side of the press platform 11 close to the permanent magnet 104. The lower surfaces of the first protrusion 9 and the second protrusion 12 are magnetically attracted to the upper surfaces of the two permanent magnets 104 respectively. The press platform 11 rotates the turntable 103 through the second protrusion 12, and the permanent magnet 104 on the outer wall of one side of the turntable 103 tilts upward, and the permanent magnet 104 pushes the first protrusion 9 and the slide bar 8 upward until the slide bar 8 pushes the pressure sensor 7, and the pressure sensor 7 senses the pressure value, and the pressure sensor 7 converts the detected vibration signal into an electrical signal, and transmits it to an external vibration detection system;

[0021] The main elastic support structure is the guide columns 201 fixed on both sides of the top of the lower round seat 1. The top of the guide column 201 is fixedly connected to the bottom of the upper round seat 2. The press table 11 is slidably mounted on the two guide columns 201. The surface of the guide column 201 below the press table 11 is covered with a main support spring 202. During the vibration of the on-load tap changer, the support table 5 and the guide column 10 force the press table 11 to move downward, and the guide column 201 is used to improve the lifting stability of the press table 11. At this time, the main support spring 202 is in a compressed state.

[0022] The secondary elastic support structure 4 includes an outer column 401 fixed at the top corner of the upper round seat 2, and an inner column 402 slidably installed inside the outer column 401, the top of the inner column 402 is fixedly connected to the bottom end of the support platform 5, and a secondary support spring 403 is installed at the bottom of the outer column 401, the top of the secondary support spring 403 is fixedly connected to the bottom end of the inner column 402, and the convex plate 6 is fixed on the outer wall of one side of the outer column 401. Since the bottom end of the support platform 5 slides with the outer column 401 through the inner column 402, and the secondary support spring 403 is also in a compressed state at this time; when the vibration of the on-load tap changer disappears, the secondary support spring 403 and the main support spring 202 force the components to reset, and the pressure sensor 7 is also unable to detect the pressure value information.

[0023] When the embodiment of the present application is in use, the staff first installs the on-load tap changer to be detected on the top of the support platform 5. At this time, the upward supporting elastic force of the main elastic supporting structure and the auxiliary elastic supporting structure 4 is equal to the gravity of the on-load tap changer, that is, the slide bar 8 is located below the pressure sensor 7, and the top of the slide bar 8 does not contact the pressure sensor 7. For the vertical vibration generated during the normal operation of the on-load tap changer, the on-load tap changer forces the support platform 5 and the guide column 10 to move downward due to the vertical vibration. Then, the press table 11 presses the main elastic supporting structure under the vertical vibration of the on-load tap changer, the support platform 5, the guide column 10 and other components, so that the main elastic supporting structure is in a compressed state. Then, the press table 11 rotates the turntable 103 through the second convex column 12, and the permanent magnet 104 on the outer wall of one side of the turntable 103 tilts upward, and the permanent magnet 104 pushes the first convex column 9 and the slide bar 8 upward until the slide bar 8 moves upward. Pressure sensor 7, then pressure sensor 7 senses the pressure value, and pressure sensor 7 converts the detected vibration signal into an electrical signal and transmits it to an external vibration detection system. The vibration detection system will analyze and process the signal to determine whether the vibration of the equipment is normal. If abnormal vibration or noise is detected, the system will issue an alarm so that repair or maintenance measures can be taken in time to avoid equipment failure and accidents. In this process, the vertical vibration intensity of the on-load tap changer is proportional to the pressure sensing value of the pressure sensor 7, so as to help users determine the vertical jump of the on-load tap changer. The device introduces vibration detection in the vertical direction to help equipment operators and maintenance personnel obtain comprehensive vibration data, which helps to capture vibration anomalies in the vertical direction, such as mechanical looseness, internal damage or stress concentration, and provide users with a more comprehensive equipment health status assessment.

Claims

1. A vibration detection device for an on-load tap changer, characterized in that: The invention comprises a lower circular seat (1) and a steel seat (3) at a corner position of the top end of the lower circular seat (1), an upper circular seat (2) being installed at the top end of the four steel seats (3), a secondary elastic support structure (4) being installed at the corner position of the top end of the upper circular seat (2), and a support platform (5) being installed at the movable end of the secondary elastic support structure (4), a convex plate (6) being fixed on the outer wall of one side of the secondary elastic support structure (4), and a pressure sensor (7) being installed on one side of the bottom end of the convex plate (6), and the upper circular seat (2) Both sides of the top are slidably mounted with slide bars (8), the slide bars (8) are located directly below the pressure sensor (7), the top of the lower circular seat (1) is mounted with a main elastic support structure, the movable end of the main elastic support structure is mounted with a press table (11), the top of the press table (11) is fixedly connected to the bottom of the support table (5), and both sides of the bottom of the lower circular seat (1) are mounted with lever support structures, the two movable ends of the lever support structures are in contact with the bottom of the slide bar (8) and the bottom of the press table (11) respectively.

2. The on-load tap changer vibration detection device according to claim 1, characterized in that: The auxiliary elastic support structure (4) comprises an outer column (401) fixed at the top corner position of the upper round seat (2), and an inner column (402) slidably installed inside the outer column (401), the top end of the inner column (402) is fixedly connected to the bottom end of the support platform (5), and an auxiliary support spring (403) is installed at the bottom of the outer column (401), the top end of the auxiliary support spring (403) is fixedly connected to the bottom end of the inner column (402), and the convex plate (6) is fixed on the outer wall of one side of the outer column (401).

3. The on-load tap changer vibration detection device according to claim 1, characterized in that: Guide pillars (10) are installed on both sides of the bottom end of the support platform (5), and the bottom ends of the guide pillars (10) penetrate the outside of the upper circular seat (2) and are fixedly connected to the top end of the pressing platform (11).

4. The on-load tap changer vibration detection device according to claim 1, characterized in that: The main elastic support structure is a guide column (201) fixed on both sides of the top of the lower round seat (1), the top of the guide column (201) is fixedly connected to the bottom of the upper round seat (2), the pressing platform (11) is slidably mounted on the two guide columns (201), and the surface of the guide column (201) below the pressing platform (11) is sleeved with a main support spring (202).

5. The on-load tap changer vibration detection device according to claim 1, characterized in that: The lever support structure comprises a vertical plate (101) fixed on both sides of the top of the lower circular seat (1), and a main shaft (102) rotatably mounted on the surface of the vertical plate (101), a rotating disk (103) being fixed on the surface of the main shaft (102), and permanent magnets (104) being fixed on both side outer walls of the rotating disk (103).

6. The on-load tap changer vibration detection device according to claim 5, characterized in that: A first convex column (9) is fixed to one end of the slide bar (8) close to the permanent magnet (104), and a second convex column (12) is installed on the outer wall of one side of the press platform (11) close to the permanent magnet (104), and the lower surfaces of the first convex column (9) and the second convex column (12) are magnetically attracted to the upper surfaces of the two permanent magnets (104) respectively.

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