Device for impulse superposition voltage test

Abstract

The utility model discloses a device for an impact superposition voltage test, which comprises a test vehicle, a carriage is arranged behind the test vehicle, and an impact generator body is arranged in the carriage; a hydraulic turnover mechanism is installed at the tail end of the carriage and fixedly connected with the impact generator body. The impact generator body comprises a fixed seat, the upper end of the fixed seat is provided with a voltage impact generation module, and the top end of the voltage impact generation module is provided with a grading ring. According to the utility model, the carriage and the hydraulic turnover mechanism integrated on the test vehicle are designed, so that the impact generator body can be conveniently transported to a test site along with the vehicle, and can be quickly turned over to a working position through the hydraulic turnover mechanism, thereby eliminating the dependence on heavy hoisting equipment in the traditional mode; the requirement on the technical level of assembling personnel is reduced; the convenience, efficiency, safety and stability of the equipment are remarkably improved, and a more efficient and reliable solution is provided for the lightning protection test of a power system.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage impact testing, in particular to a device for impact superimposed voltage testing. Background Art

[0002] In the complex environment of power systems, high-voltage electrical equipment must not only cope with the challenges of sustained, stable power frequency voltages, but also defend against sudden, temporary overvoltages and the highly dangerous effects of lightning overvoltages. When lightning strikes transmission lines or power equipment, it can trigger overvoltages with high amplitudes and steep waveforms, severely testing the insulation performance of the equipment. To effectively evaluate the lightning protection capabilities of power equipment, impulse voltage generators are widely used in engineering practice to simulate lightning strikes and ensure safe operation of equipment under extreme conditions.

[0003] However, in pursuit of uniform distribution of the cutting-edge electric field, traditional impulse voltage generator designs tend to adopt a layout with multiple large-sized grading rings arranged coaxially. Although this design strategy significantly enhances the uniformity of the electric field, it is also accompanied by the problem of a rapid expansion of the grading ring volume, which directly leads to an increase in the equipment's footprint and a decrease in space utilization. In practical operations, large-volume equipment not only increases the difficulty of safe transportation and loading and unloading, but also forces on-site assembly and disassembly processes to rely heavily on heavy lifting equipment and the cooperation of professional and skilled personnel, making the process cumbersome and time-consuming. What's more, each rearrangement or on-site relocation after the test requires the repetition of the above complex operations, which seriously affects the test efficiency and the rapid response capability of the equipment, thereby limiting the widespread application and convenience of impulse voltage generators in field tests. Therefore, it is particularly important to explore an impulse superposition voltage test device that can maintain electric field uniformity while being easy to carry, assemble, and maintain. Summary of the Invention

[0004] The purpose of the present utility model is to provide a device for impulse superposition voltage testing to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A device for an impulse superimposed voltage test comprises a test vehicle, wherein a carriage is provided at the rear of the test vehicle; a limit groove is provided in the carriage, wherein an impact generator body is provided in the limit groove; a hydraulic flipping mechanism is installed at the end of the carriage, wherein the hydraulic flipping mechanism is fixedly connected to the impact generator body; the hydraulic flipping mechanism comprises a flipping base, wherein a hinged seat is provided on the side of the flipping base close to the end of the carriage, and the flipping base is movably connected to the end of the carriage via a rotating shaft; the impact generator body comprises a fixed seat, wherein the lower end of the fixed seat is fixedly connected to the flipping base; a voltage impulse generating module is provided at the upper end of the fixed seat, and a voltage equalizing ring is installed at the top of the voltage impulse generating module.

[0007] Preferably, the voltage shock generating module includes a protective tube, wherein the lower end of the protective tube is connected to the fixing seat, and the upper end of the protective tube is connected to the equalizing ring; a mounting bracket is provided on one side of the protective tube, wherein a plurality of charging capacitors are provided on the mounting bracket; a plurality of charging resistors are provided along the axial direction of the outer wall of the protective tube, wherein each charging resistor is electrically connected to the charging capacitor to form a charging and discharging circuit.

[0008] Preferably, a plurality of synchronous ball gaps are provided in the protective tube, and each synchronous ball gap is electrically connected to the charging capacitor.

[0009] Preferably, the pressure-equalizing ring is made of a copper tube with a diameter of 200 mm, wherein the pressure-equalizing ring is a rectangular frame structure, and arc-shaped transition surfaces are provided at the corners of the pressure-equalizing ring.

[0010] Preferably, support rods are symmetrically installed on both sides of the flip base, wherein a hydraulic cylinder is provided in the limit groove; the bottom of the cylinder body of the hydraulic cylinder is movably connected to the bottom of the limit groove, wherein the top of the piston rod of the hydraulic cylinder is movably connected to the side wall of the support rod.

[0011] Preferably, outwardly extending support arms are provided at the four corners of the flip base, wherein each support arm is mounted with a hydraulic support leg.

[0012] Preferably, an avoidance groove adapted to the pressure equalizing ring is provided on the inner side of the limiting groove.

[0013] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention integrates a carriage and a hydraulic flipping mechanism on the test vehicle, so that the impact generator body can be conveniently transported to the test site with the vehicle, and can be quickly flipped to the working position through the hydraulic flipping mechanism, eliminating the reliance on heavy lifting equipment in the traditional method, reducing the technical requirements for the assembly personnel, and significantly improving the convenience of on-site use; the limit slot design in the carriage ensures the stability of the impact generator body during transportation, and the design of the hydraulic flipping mechanism enables the equipment to be compactly stored in the carriage when not in use, greatly saving space and facilitating storage and transportation; the coordinated use of the hydraulic flipping mechanism and the hydraulic support legs enables the impact generator body to be quickly and accurately positioned to the required position for the test, and stably supported by the hydraulic support legs, reducing the time for assembly and disassembly, improving the efficiency and response speed of the test, and significantly improving the convenience, efficiency, safety and stability of the equipment, providing a more efficient and reliable solution for lightning protection testing of power systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 yes Figure 1 An enlarged schematic diagram of the structure at point A is shown;

[0016] Figure 3 It is a structural diagram of the impact generator body of the utility model.

[0017] Among them: 1. Test vehicle; 2. Carriage; 3. Limiting groove; 4. Impact generator body; 401. Fixing seat; 402. Voltage impact generating module; 4021. Protective tube; 4022. Mounting bracket; 4023. Charging capacitor; 4024. Charging resistor; 403. Equalizing ring; 5. Hydraulic flipping mechanism; 501. Flipping base; 502. Articulated seat; 503. Rotating shaft; 6. Support rod; 7. Hydraulic cylinder; 8. Support arm; 9. Hydraulic support leg; 10. Avoidance groove. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] Please refer to Figures 1 to 3 To achieve the above objectives, the present invention provides the following technical solutions:

[0020] A device for an impulse superimposed voltage test comprises a test vehicle 1, wherein a carriage 2 is provided at the rear of the test vehicle 1; a limit groove 3 is provided in the carriage 2, wherein an impact generator body 4 is provided in the limit groove 3; a hydraulic flipping mechanism 5 is installed at the end of the carriage 2, wherein the hydraulic flipping mechanism 5 is fixedly connected to the impact generator body 4; the hydraulic flipping mechanism 5 comprises a flipping base 501, wherein a hinged seat 502 is provided on the side of the flipping base 501 close to the end of the carriage 2, and the flipping base 501 is movably connected to the end of the carriage 2 via a rotating shaft 503; the impact generator body 4 comprises a fixed seat 401, wherein the lower end of the fixed seat 401 is fixedly connected to the flipping base 501; a voltage impulse generating module 402 is provided at the upper end of the fixed seat 401, and a voltage equalizing ring 403 is installed at the top of the voltage impulse generating module 402.

[0021] The impact generator body 4 is cleverly designed and installed within the compartment 2 of the test vehicle 1. It is secured by means of retaining grooves 3 within the compartment 2, ensuring that the impact generator body 4 does not shake or become damaged during transportation. The impact generator body 4 is tightly coupled to the compartment 2 via the retaining grooves 3 and may also be equipped with additional securing devices, such as latches or straps, to enhance safety during transportation. Upon arrival at the designated test site, the test vehicle 1 first undergoes an environmental inspection to ensure that the site is flat, safe, and meets test requirements. The operator activates the hydraulic tilting mechanism 5, which is movably connected to the rotating shaft 503 at the end of the compartment 2 via an articulated seat 502 on the tilting base 501. Driven by the hydraulic system, the tilting base 501 slowly tilts the impact generator body 4 out of the compartment 2 until it reaches the predetermined test angle. During or after the tilting process, the hydraulic legs 9 on the tilting base 501 are automatically or manually deployed to ensure the stability of the impact generator body 4 during the test. The hydraulic legs 9 can be fine-tuned according to the terrain to achieve optimal support.

[0022] The voltage surge generating module 402, the core of the test, generates the required surge voltage through a charge-discharge circuit consisting of an internal charging capacitor 4023 and a charging resistor 4024. These voltage signals are precisely controlled and evenly distributed to the test object through a voltage grading ring 403. The voltage grading ring 403 is designed to improve the uniformity of the electric field distribution and reduce the occurrence of partial discharge. It is made of copper tubes with good conductivity and mechanical strength. The rectangular frame structure and the curved transition surfaces at the corners further enhance the voltage grading effect.

[0023] See also Figure 3 As an embodiment of the present invention, the voltage surge generating module 402 includes a protective tube 4021, wherein the lower end of the protective tube 4021 is connected to the fixing base 401, and the upper end of the protective tube 4021 is connected to the voltage grading ring 403; a mounting bracket 4022 is provided on one side of the protective tube 4021, wherein the mounting bracket 4022 is provided with a plurality of charging capacitors 4023; a plurality of charging resistors 4024 are provided along the axial direction of the outer wall of the protective tube 4021, wherein each charging resistor 4024 is electrically connected to the charging capacitor 4023 to form a charging and discharging circuit; a plurality of synchronization ball gaps (not shown) are provided in the protective tube 4021, and each synchronization ball gap is electrically connected to the charging capacitor 4023.

[0024] In the above-mentioned scheme, the protective tube 4021 serves as the outer shell of the voltage impulse generating module 402, and mainly plays the role of protecting the internal circuit from external environmental influences (such as dust, moisture, mechanical shock, etc.); the lower end of the protective tube 4021 is tightly connected to the fixing seat 401 to ensure the stable installation of the entire module; the upper end is connected to the equalizing ring 403, and the generated impulse voltage is evenly distributed to the test object through the equalizing ring 403; the mounting bracket 4022 is located on one side of the protective tube 4021, and is used to support and fix a plurality of groups of charging capacitors 4023, wherein the charging capacitors 4023 are one of the key components for generating impulse voltage. The charging capacitors 4023 are neatly arranged by the mounting bracket 4022. They can store a large amount of electrical energy and release it quickly when needed to generate the required impulse voltage waveform; the outer wall of the protective tube 4021 is provided with a plurality of groups of charging resistors 4024 along its axial direction, wherein The charging resistor 4024 corresponds to the charging capacitor 4023 and is electrically connected to each other, forming the basic part of the charging and discharging circuit; in the charging stage, the external power supply charges the charging capacitor 4023 through the charging resistor 4024, so that the capacitor stores electrical energy; in the discharging stage, the charging capacitor 4023 is rapidly discharged through components such as the synchronous ball gap to generate an impulse voltage; a number of synchronous ball gaps are provided in the protective tube 4021, among which the synchronous ball gap is a key component for controlling the time when the impulse voltage is generated. The synchronous ball gap can realize simultaneous or sequential discharge of multiple capacitors by precisely controlling its gap distance and trigger voltage; each synchronous ball gap is electrically connected to a group of charging capacitors 4023, ensuring that the electrical energy stored in the capacitor can be quickly released during discharge to form the required impulse voltage waveform; in this process, the precise control of the charging and discharging circuit and the synchronous ball gap ensures that the waveform and amplitude of the impulse voltage meet the test requirements.

[0025] See also Figure 3 As an embodiment of the present invention, the equalizing ring 403 is made of a copper tube with a diameter of 200 mm, wherein the equalizing ring 403 is a rectangular frame structure, and an arc-shaped transition surface is provided at the corner position of the equalizing ring 403.

[0026] In the above-mentioned scheme, the equalizing ring 403 is made of a copper tube with a diameter of 200 mm. Copper is an excellent conductive material with high conductivity and good mechanical properties, which can ensure that the equalizing ring 403 has low resistance and high stability when transmitting impulse voltage; the equalizing ring 403 is designed as a rectangular frame structure, which helps to achieve a wider coverage on a two-dimensional plane, so that the impulse voltage can be more evenly distributed on the surface of the test object. The rectangular structure is also easy to install and fix, and matches the shape of most electrical equipment; an arc-shaped transition surface is provided at the corner position of the equalizing ring 403. This design aims to reduce the electric field concentration phenomenon at the corner, because right-angle or sharp-angle structures are prone to cause local discharge or breakdown in the electric field. The arc-shaped transition surface can smoothly transition the electric field, making the electric field distribution on the entire equalizing ring 403 more uniform.

[0027] The main function of the grading ring 403 is to uniformize the electric field generated by the impulse voltage through its conductive properties and structural design. When the impulse voltage is generated by the voltage impulse generating module 402 and transmitted to the grading ring 403, the grading ring 403 will distribute the electric field to its entire surface and ensure the uniformity of the electric field through its rectangular frame structure and arc-shaped transition surface. By uniformly distributing the electric field, the grading ring 403 can reduce the local discharge or breakdown phenomenon caused by the concentration of the electric field on the surface of the test object, which is very important for protecting the insulation performance of the test object, especially when conducting high voltage tests. During the impact test, the uniform electric field distribution of the equalizing ring 403 helps to improve the accuracy of the impact voltage test. Since the electric field is evenly distributed, the voltage distribution on the test object is also more consistent, so that the insulation strength and tolerance of the test object can be evaluated more accurately. Although the equalizing ring 403 itself is a rectangular frame structure, its design has a certain degree of flexibility and can adapt to test objects of different shapes by adjusting its size and shape. At the same time, the design of the arc-shaped transition surface also enables the equalizing ring 403 to better fit the surface contour of the test object, further improving the uniformity of the electric field.

[0028] Please refer to Figure 1 、 Figure 2 As an embodiment of the present invention, support rods 6 are symmetrically installed on both sides of the flip base 501, wherein a hydraulic cylinder 7 is provided in the limiting groove 3; the bottom of the cylinder body of the hydraulic cylinder 7 is movably connected to the bottom of the limiting groove 3, wherein the top of the piston rod of the hydraulic cylinder 7 is movably connected to the side wall of the support rod 6.

[0029] In the above-mentioned scheme, the flip base 501 serves as the basic part of the hydraulic flip mechanism 5. The flip base 501 is responsible for supporting the entire impact generator body 4 and allows the impact generator body 4 to perform flipping motion through its design. Support rods 6 are symmetrically installed on both sides of the flip base 501. These support rods 6 not only enhance the stability of the flip base 501, but also provide connection points for the hydraulic cylinder 7; the support rods 6 are installed on both sides of the flip base 501, and the side walls thereof are movably connected to the top of the piston rod of the hydraulic cylinder 7. This design enables the hydraulic cylinder 7 to drive the flip base 501 and the impact generator body 4 thereon to perform flipping motion when it is extended and retracted; the hydraulic cylinder 7 is installed It is installed in the limit groove 3, and the bottom of its cylinder body is movably connected to the bottom of the limit groove 3. This installation method ensures that the hydraulic cylinder 7 can stably push the flip base 501 to flip during operation; when the hydraulic cylinder 7 receives a working instruction, the hydraulic oil inside it is compressed and pushes the piston rod forward. Since the top end of the piston rod is movably connected to the side wall of the support rod 6, the extension of the piston rod will drive the support rod 6 and the flip base 501 to flip around the rotating shaft 503; when reset is required, the hydraulic oil in the hydraulic cylinder 7 is released, and the piston rod retracts under the action of a spring or other reset mechanism, thereby driving the flip base 501 and the impact generator body 4 back to their initial positions.

[0030] Preparation stage: Before the test begins, the hydraulic tilting mechanism 5 is in the initial position, the impact generator body 4 is fixed on the tilting base 501 and located in the vehicle compartment 2; at this time, the hydraulic cylinder 7 is in an inoperative state, and the tilting base 501 and the support rod 6 remain stable;

[0031] Turnover stage: When a test is required, the hydraulic turning mechanism 5 starts to work. After receiving the working instruction, the hydraulic cylinder 7 pushes the piston rod to extend, driving the support rod 6 and the turning base 501 to turn around the rotation axis 503. As the turning movement proceeds, the impact generator body 4 gradually turns out from the carriage 2 and reaches the predetermined test angle;

[0032] Stabilization stage: When the impact generator body 4 is flipped to a predetermined angle, the hydraulic cylinder 7 stops working and maintains the current state; at this time, the flip base 501 and the impact generator body 4 are kept in a stable position by the locking mechanism of the support rod 6 and the hydraulic cylinder 7, ready for the subsequent voltage impact test;

[0033] Reset phase: After the test, the hydraulic tilting mechanism 5 performs a reset operation. The hydraulic cylinder 7 releases the internal hydraulic oil and drives the piston rod to retract, thereby causing the tilting base 501 and the impact generator body 4 to flip around the rotation axis 503 and return to the initial position. The impact generator body 4 is then re-secured in the carriage 2 and prepared for the next transportation or test.

[0034] See also Figure 2 As an embodiment of the present invention, outwardly extending support arms 8 are provided at the four corners of the flip base 501, wherein each support arm 8 is mounted with a hydraulic support leg 9.

[0035] In the above-mentioned scheme, the flip base 501 serves as the basic supporting structure of the entire test device. The flip base 501 is responsible for carrying the impact generator body 4 and its related components. Its design needs to take into account stability, load-bearing capacity and flipping flexibility; support arms 8 extend outward from the four corners of the flip base 501, wherein the support arms 8 are conducive to enhancing the support strength of the flip base 501; each support arm 8 is installed with a hydraulic support leg 9, wherein the support arm 8 is usually made of sturdy and durable materials to withstand various forces and moments during the test; the hydraulic support legs 9 are key components for supporting and stabilizing the test device, and they can adjust the height and angle according to the terrain and work requirements; the hydraulic support legs 9 realize telescopic and rotational movements through the hydraulic system. When the height or angle of the test device needs to be adjusted, the hydraulic system will inject or release hydraulic oil into the hydraulic support legs 9, thereby driving the legs to perform corresponding movements. This design enables the test device to adapt to different work sites and test requirements.

[0036] See also Figure 1 As an embodiment of the present invention, an avoidance groove 10 adapted to the pressure equalizing ring 403 is opened on the inner side of the limiting groove 3.

[0037] In the above-described scheme, the purpose of designing the avoidance groove 10 is to ensure that the pressure-equalizing ring 403 is accurately installed, wherein the shape and size of the avoidance groove 10 match the pressure-equalizing ring 403, so that the pressure-equalizing ring 403 can be accurately and stably installed in the limiting groove 3, avoiding dislocation or offset during the installation process; the design of the avoidance groove 10 helps to reduce the mechanical stress on the pressure-equalizing ring 403 during operation, prevent equipment damage or failure caused by stress concentration, and improve the safety and reliability of the equipment; during the operation of the equipment, due to changes in environmental factors such as temperature and pressure, the pressure-equalizing ring 403 may undergo slight deformation. The design of the avoidance groove 10 has a certain elasticity or adaptability, which can accommodate such slight deformation, ensuring that the contact between the pressure-equalizing ring 403 and the limiting groove 3 is tight and stable.

[0038] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A device for an impulse superposition voltage test, comprising a test vehicle (1), wherein a carriage (2) is provided at the rear of the test vehicle (1); characterized in that: A limiting groove (3) is provided in the carriage (2), wherein an impact generator body (4) is provided in the limiting groove (3); a hydraulic turning mechanism (5) is installed at the end of the carriage (2), wherein the hydraulic turning mechanism (5) is fixedly connected to the impact generator body (4); the hydraulic turning mechanism (5) comprises a turning base (501), wherein a hinged seat (502) is provided on a side of the turning base (501) close to the end of the carriage (2), and the turning base (501) is movably connected to the end of the carriage (2) via a rotating shaft (503); the impact generator body (4) comprises a fixing base (401), wherein the lower end of the fixing base (401) is fixedly connected to the turning base (501); a voltage impact generating module (402) is provided at the upper end of the fixing base (401), and a pressure equalizing ring (403) is installed at the top of the voltage impact generating module (402).

2. The device for impulse superposition voltage test according to claim 1, characterized in that: The voltage impulse generating module (402) comprises a protective tube (4021), wherein the lower end of the protective tube (4021) is connected to the fixing seat (401), and the upper end of the protective tube (4021) is connected to the voltage equalizing ring (403); a mounting bracket (4022) is provided on one side of the protective tube (4021), wherein a plurality of charging capacitors (4023) are provided on the mounting bracket (4022); and a plurality of charging resistors (4024) are provided along the axial direction of the outer wall of the protective tube (4021), wherein each charging resistor (4024) is electrically connected to a charging capacitor (4023) to form a charging and discharging circuit.

3. The device for impulse superposition voltage test according to claim 2, characterized in that: A plurality of synchronous ball gaps are provided in the protective tube (4021), and each synchronous ball gap is electrically connected to the charging capacitor (4023).

4. The device for impulse superposition voltage test according to claim 1, characterized in that: The pressure equalizing ring (403) is made of a copper tube with a diameter of 200 mm, wherein the pressure equalizing ring (403) is a rectangular frame structure, and an arc-shaped transition surface is provided at the corner position of the pressure equalizing ring (403).

5. The device for impulse superposition voltage test according to claim 1, characterized in that: Support rods (6) are symmetrically installed on both sides of the flip base (501), wherein a hydraulic cylinder (7) is provided in the limiting groove (3); the bottom of the cylinder body of the hydraulic cylinder (7) is movably connected to the bottom of the limiting groove (3), wherein the top end of the piston rod of the hydraulic cylinder (7) is movably connected to the side wall of the support rod (6).

6. The device for impulse superposition voltage test according to claim 5, characterized in that: The four corners of the flip base (501) are provided with outwardly extending support arms (8), wherein each support arm (8) is installed with a hydraulic support leg (9).

7. The device for impulse superposition voltage test according to claim 1, characterized in that: An avoidance groove (10) adapted to the pressure equalizing ring (403) is provided on the inner side of the limiting groove (3).

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