Insulator aging test environment adjusting device in power supply system

Abstract

The utility model discloses an insulator aging test environment adjusting device in a power supply system, which belongs to the field of electrical detection devices and is used for simulating different outdoor use environments of insulators. The aging test box is divided into a first chamber, a second chamber and a third chamber, an insulator to be tested is fixed through a first clamp and a second clamp in the second chamber, and a high-voltage wire and a low-voltage wire are respectively connected with the first clamp and the second clamp in the first chamber and the third chamber. The side face of the second cavity is connected with a fan. An air outlet of the fan is connected with a wind adjusting mechanism. A water tank and a sand box are arranged in the first cavity and communicated with the top of the second cavity, and speed regulating valves are arranged at outlets of the first cavity and the second cavity. A to-be-tested insulator is installed in the second chamber, the fan is started, the wind speed and the wind direction of wind power of the fan are adjusted, the flow speed of water and the flow speed of sand are adjusted through the speed adjusting valves respectively, and then different test environments are simulated.

Description

Technical Field

[0001] The utility model relates to an electrical detection device, in particular to an insulator aging test environment regulating device in a power supply system. Background Art

[0002] The power supply system of the high-speed railway contact network provides a stable high-voltage power supply for the safe operation of the EMU, so ensuring the stability of the power supply system is crucial to the safe operation of the EMU. The transmission network has the widest coverage in the power supply system. The transmission network transmits electricity through high-voltage wires, which are laid with the help of a large number of poles. Due to the high voltage electricity transmitted, insulators need to be installed on the poles to prevent leakage. Therefore, the state of the insulators is directly related to the power transmission safety of the transmission network.

[0003] Insulators have a service life. Insulators at different times have different performances. Maintenance personnel will replace new insulators when they are near the end of their service life to ensure the safe operation of the power grid. The service life of insulators is usually evaluated through aging tests, that is, the use environment of the insulators is simulated before they are put into service, and accelerated aging tests are performed on the insulators. The performance of the insulators after the test is tested to evaluate their service life and related performance parameters in the corresponding test environment.

[0004] However, most of the current aging tests only consider the withstand voltage performance of insulators, that is, the aging test mainly applies high voltage to the insulators, and evaluates their withstand voltage performance and service life under high voltage by breakdown voltage, and does not take into account the environment in which the insulators are used in the high-speed railway transmission network. In the high-speed railway transmission network, insulators are mostly located in the field environment and are eroded by rain and sand for a long time, which will also seriously affect the performance of the insulators. Therefore, it is necessary to design aging tests for the application scenarios of high-speed railway transmission networks. However, my country's high-speed railway network covers a wide area, and the erosion factors suffered by insulators in different regions are also quite different. If the same test standards are used, the service life of insulators in different regions will be wrongly evaluated. Utility Model Content

[0005] The purpose of the utility model is to provide an insulator aging test environment adjustment device for a power supply system in order to solve the above-mentioned problems, so as to simulate different outdoor use environments of insulators in the same device, so as to improve the pertinence of insulator aging tests in different regions.

[0006] The technical solution adopted by the utility model is as follows:

[0007] An insulator aging test environment regulating device in a power supply system comprises an aging test box, wherein the aging test box is divided into a first chamber, a second chamber and a third chamber from top to bottom;

[0008] A first clamp is installed at the center of the top of the second chamber, and the first clamp passes through the top of the second chamber to the bottom of the first chamber; a second clamp is installed at the center of the bottom of the second chamber, and the second clamp passes through the bottom of the second chamber to the top of the third chamber; the first clamp is used to clamp the high-voltage end hardware of the insulator to be tested, and the second clamp is used to clamp the low-voltage end hardware of the insulator to be tested; a fan is connected to the side of the second chamber, and the fan is connected to the second chamber; the air outlet of the fan is connected to a wind force adjustment mechanism;

[0009] A water tank and a sand box are provided in the first chamber, the bottom of the water tank and the bottom of the sand box are both connected to the top of the second chamber, and the connecting positions are both located between the fan and the first fixture; a speed regulating valve is provided at the bottom of the water tank and the bottom of the sand box; a high-voltage wire is inserted into the first chamber and connected to the first fixture;

[0010] A low voltage wire is passed into the third chamber and connected to the second fixture.

[0011] Furthermore, the arrangement direction of the communication positions of the water tank and the sand box with the second chamber is the same as the direction from the fan to the first fixture.

[0012] Furthermore, the communication position between the water tank and the second chamber is farther from the fan than the communication position between the sand box and the second chamber.

[0013] Furthermore, the wind force regulating mechanism includes at least two side-by-side air ducts, the outlets of the air ducts have different sizes, and the inlets of the air ducts are respectively provided with switch valves.

[0014] Furthermore, the outlet of each air duct faces the insulator to be tested.

[0015] Furthermore, the bottom of the water tank and the bottom of the sand box are both rectangular prisms that are larger at the top and smaller at the bottom, and the speed regulating valves are both located at the lower ends of the rectangular prisms.

[0016] Furthermore, a first insulator is connected to the top of the first chamber, and a free end of the first insulator is connected to the high-voltage wire through a first traction line; a second insulator is connected to the bottom of the third chamber, and a free end of the second insulator is connected to the low-voltage wire through a second traction line.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] The insulator aging test environment regulating device in the power supply system of the present invention simulates the basic use environment of the insulator by installing the insulator to be tested on the first clamp and the second clamp, applying high voltage to it through the high-voltage wire, and grounding it through the low-voltage wire. The wind force is applied to the insulator to be tested by the fan, thereby affecting its bow force condition, simulating the force condition of the insulator to be tested in the field, and the wind force regulating mechanism simulates different wind force magnitudes and force directions, which can improve the authenticity of the wind force test. In addition, the water in the water tank and the sand in the sand box enter the second chamber under the action of gravity, and act on the insulator to be tested under the action of wind force to simulate the effect of wind sand and rain on the insulator to be tested. The flow rate of water and sand can be adjusted by the corresponding speed regulating valve, thereby adjusting the size of the simulated wind sand and rain, and in conjunction with the adjustment of the wind force and wind direction of the fan, a combination of multiple test environments can be obtained, thereby realizing the simulation of the insulator to be tested in multiple use environments, so as to improve its authenticity in use in different environments and improve the accuracy of its service life evaluation in the corresponding use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the environmental conditioning device for insulator aging test.

[0020] Figure 2 is a structural diagram of a first clamp and a second clamp in one embodiment.

[0021] Figure 3 It is a structural diagram of a wind force regulating mechanism in one embodiment.

[0022] Figure 4 is a diagram of the structure of a sandbox in one embodiment.

[0023] In the figure, 1 is an aging test box, 2, 3, 4 are the first chamber, the second chamber and the third chamber respectively; 23 is a first partition, 34 is a second partition, 5 is a first fixture, 51 is a first connecting portion, 52 is a mounting portion, 53 is a second connecting portion, 6 is a second fixture, 7 is an insulator to be tested, 8 is a fan, 9 is a wind force regulating mechanism, 91 is a first air duct, 92 is a second air duct, 93 is a third air duct, 10 is a sand box, 11 is a water tank, 12 is a rectangular prism, 13 is a first insulator, 14 is a second insulator, 15 is a high-voltage wire, 16 is a low-voltage wire, 17 is a first traction line, and 18 is a second traction line. DETAILED DESCRIPTION

[0024] The utility model is described in detail below in conjunction with the accompanying drawings.

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] like Figure 1 As shown, the insulator aging test environment conditioning device in the power supply system includes an aging test box 1, which is a rectangular parallelepiped as a whole and is made of insulating material. The aging test box 1 is divided from top to bottom into a first chamber 2, a second chamber 3 and a third chamber 4 by a first partition 23 and a second partition 34, wherein the second chamber 3 is used as the main place for the test, and the first chamber 2 provides some influencing factors required for the test.

[0027] A first clamp 5 is installed in the center of the top of the second chamber 3 (i.e., the bottom of the first partition 23). The first clamp 5 is used to clamp the high-voltage end hardware of the insulator 7 to be tested. It can be a hook type, a snap type, a lock type, or a clamp type structure, which is not specifically limited here. The basic requirement is that it can fix the insulator 7 to be tested. The first clamp 5 passes through the top of the second chamber 3 to the bottom of the first chamber 2, that is, through the first partition 23. A second clamp 6 is installed in the center of the bottom of the second chamber 3 (i.e., the top of the second partition 34). The second clamp 6 passes through the bottom of the second chamber 3 to the top of the third chamber 4, that is, through the second partition 34. The second clamp 6 is used to clamp the low-voltage end hardware of the insulator 7 to be tested.

[0028] like Figure 2 As shown, in some embodiments, the structure of the clamp is described by taking the first clamp 5 as an example, and the second clamp 6 and the first clamp 5 can be designed to have the same structure. The first clamp 5 includes a first connecting portion 51, a mounting portion 52, and a second connecting portion 53. The first connecting portion 51 is mounted to the bottom of the first partition 23 (i.e., the top of the second chamber 3) through the mounting portion 52, and one end of the second connecting portion 53 is connected to the first connecting portion 51, and the other end passes through the first partition 23 and extends to the bottom of the first chamber 2. The second connecting portion 53 is used to connect to the high-voltage wire 15. For the second clamp 6, the second connecting portion 53 is used to connect to the low-voltage wire 16.

[0029] A fan 8 is connected to the side of the second chamber 3, and the fan 8 is connected to the second chamber 3. The fan 8 is usually floor-standing and connected to the second chamber 3 through a bent pipe. In order to achieve speed and / or direction adjustment of wind force, a wind force adjustment mechanism 9 is connected to the air outlet of the fan 8.

[0030] In some embodiments, the wind force adjustment mechanism 9 includes at least two side-by-side wind ducts. Figure 33 examples of air ducts are given in FIG. 9 , which are the first air duct 91, the second air duct 92 and the third air duct 93 from top to bottom. The outlets of the air ducts are different in size, and the inlets of the air ducts are respectively provided with switch valves. By opening or closing the corresponding switch valves, the corresponding air ducts can be opened or closed. Under the same power, the wind force and the air outlet position can be adjusted. In addition, the outlets of the air ducts are all directed toward the insulator 7 to be tested, for example, Figure 3 As shown, the outlet of the air duct arranged in the non-central part is designed to be wedge-shaped, and the outlet wind direction is aligned with the insulator to be tested 7 by designing the angle of the wedge. Then, by opening or closing the corresponding switch valve, the force direction of the insulator to be tested 7 can also be adjusted. The switch valve is usually controlled by PLC.

[0031] A water tank 11 and a sand box 10 are provided in the first chamber 2. The water tank 11 is filled with water, and the sand box 10 is filled with sand. Of course, other boxes can also be provided to provide corresponding test elements to the second chamber 3. The bottom of the water tank 11 and the bottom of the sand box 10 are both connected to the top of the second chamber 3, and the bottom of the water tank 11 and the bottom of the sand box 10 both penetrate the first partition 23. The bottom of the water tank 11 and the bottom of the sand box 10 are both provided with speed regulating valves, for example, the bottom of the water tank 11 is provided with a first speed regulating valve, and the bottom of the sand box 10 is provided with a second speed regulating valve, which are used to adjust the speed of water and sand entering the second chamber 3, thereby controlling the mass of water and sand acting on the insulator 7 to be tested per unit time.

[0032] like Figure 4 As shown, in some embodiments, the bottom of the water tank and the bottom of the sand box 10 are both rectangular prisms 12 (also called rectangular prisms, i.e., four-sided prisms with two rectangular bottom surfaces), which are larger at the top and smaller at the bottom. The speed regulating valves are all located at the lower end of the rectangular prism 12 (i.e., one end of the smaller bottom surface). The speed regulating valves are usually controlled by PLC or the like.

[0033] Water and sand particles are both applied to the insulator 7 to be tested under the action of wind force. Therefore, for a more efficient test, the arrangement direction of the connection position of the water tank 11 and the sand box 10 with the second chamber 3 is the same as the direction from the fan 8 to the first fixture 5, that is, the four are arranged in sequence, rather than the water tank 11 and the sand box 10 side by side. For example, the first fixture 5 is located on the axis of the air outlet of the fan 8, and the connection position (or its center) of the water tank 11 and the sand box 10 with the second chamber 3 is also set on the axis. In some embodiments, in order to prevent the outlet of the sand box 10 from being damp and blocking the outlet, the connection position of the water tank 11 with the second chamber 3 is farther from the fan 8 than the connection position of the sand box 10 with the second chamber 3, that is, the fan 8, the outlet of the sand box 10, the outlet of the water tank 11, and the insulator 7 to be tested are arranged in sequence. Sand particles can obtain a greater acceleration under the action of wind than water, so before the water is blown onto the insulator 7 to be tested, most of the sand particles have been dissolved in the water, thereby simulating the effect of rainy weather on the insulator 7 to be tested.

[0034] In addition, since rainwater is simulated in the second chamber 3, the top surface of the second partition 34 can be designed to be an inclined surface, which is higher on the side close to the fan 8, and a sewage outlet is designed on the other opposite side to discharge water and sand.

[0035] The high-voltage wire 15 is inserted into the first chamber 2 and connected to the first fixture 5; the low-voltage wire 16 is inserted into the third chamber 4 and connected to the second fixture 6. The high-voltage wire 15 is connected to the high-voltage potential, and the low-voltage wire 16 is grounded. Since high voltage is applied to the device, the wire is likely to induce electromagnetic induction to the object it contacts. In order to minimize the contact between the wire and the aging test box 1, a first insulator 13 is provided in the first chamber 2, and a second insulator 14 is provided in the third chamber 4. One end of the first insulator 13 is connected to the top of the first chamber 2, and the other end is connected to the high-voltage wire 15 as a free end through the first traction line 17 to suspend the high-voltage wire 15. One end of the second insulator 14 is connected to the bottom of the third chamber 4, and the other end of the second insulator 14 is connected to the low-voltage wire 16 as a free end through the second traction line 18 to suspend the low-voltage wire 16.

[0036] During the test, the two ends of the insulator 7 to be tested are respectively mounted on the first fixture 5 and the second fixture 6, high voltage electricity is applied to the first fixture 5 through the high-voltage wire 15, the fan 8 is turned on, and the power of the fan 8 is adjusted according to the environment to be simulated, the sand box 10 and the water tank 11 are turned on, and the flow rate of the two is adjusted as needed. During the test, the wind speed and wind direction can be adjusted by selecting the air duct to be opened or closed; similarly, the flow rate of the sand box 10 and the water tank 11 can also be adjusted as needed to adjust the size of the simulated wind, sand and rain. After the test, the insulator 7 to be tested is removed, its performance indicators are tested, and its service life under the corresponding test environment is estimated based on these performance indicators.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmental conditioning device for insulator aging test in a power supply system, characterized in that: The aging test chamber is divided into a first chamber, a second chamber and a third chamber from top to bottom; A first clamp is installed at the center of the top of the second chamber, and the first clamp passes through the top of the second chamber to the bottom of the first chamber; a second clamp is installed at the center of the bottom of the second chamber, and the second clamp passes through the bottom of the second chamber to the top of the third chamber; the first clamp is used to clamp the high-voltage end hardware of the insulator to be tested, and the second clamp is used to clamp the low-voltage end hardware of the insulator to be tested; a fan is connected to the side of the second chamber, and the fan is connected to the second chamber; the air outlet of the fan is connected to a wind force adjustment mechanism; A water tank and a sand box are provided in the first chamber, the bottom of the water tank and the bottom of the sand box are both connected to the top of the second chamber, and the connecting positions are both located between the fan and the first fixture; a speed regulating valve is provided at the bottom of the water tank and the bottom of the sand box; a high-voltage wire is inserted into the first chamber and connected to the first fixture; A low voltage wire is passed into the third chamber and connected to the second fixture.

2. The insulator aging test environment adjustment device in the power supply system according to claim 1, characterized in that: The arrangement direction of the communication positions of the water tank and the sand box with the second chamber is the same as the direction from the fan to the first fixture.

3. The insulator aging test environment adjustment device in the power supply system according to claim 2, characterized in that: The communication position between the water tank and the second chamber is farther from the fan than the communication position between the sand box and the second chamber.

4. The insulator aging test environment adjustment device in the power supply system according to claim 1, characterized in that: The wind force regulating mechanism comprises at least two side-by-side air ducts, the outlets of the air ducts have different sizes, and the inlets of the air ducts are respectively provided with switch valves.

5. The insulator aging test environment adjustment device in the power supply system according to claim 4, characterized in that: The outlet of each air duct faces the insulator to be tested.

6. The insulator aging test environment adjustment device in the power supply system according to claim 1, characterized in that: The bottom of the water tank and the bottom of the sand box are both rectangular prisms that are larger at the top and smaller at the bottom, and the speed regulating valves are all located at the lower ends of the rectangular prisms.

7. The insulator aging test environment adjustment device in the power supply system according to claim 1, characterized in that: A first insulator is connected to the top of the first chamber, and a free end of the first insulator is connected to the high-voltage wire through a first traction line; a second insulator is connected to the bottom of the third chamber, and a free end of the second insulator is connected to the low-voltage wire through a second traction line.

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