A seismic performance detection system for sliding fittings in a converter station and its usage method

Abstract

A seismic performance detection system for a sliding fitting of a converter station and its usage method. The sliding fitting includes: a horizontal connecting plate, a support plate, a sliding groove, a support shaft, and an arc-shaped busbar support seat. The system includes: a horizontally arranged actuator, and a fixing member vertically arranged at one end of the actuator. The fixing member includes a limiting member and a fixing bracket matching the limiting member. The limiting member includes clamping members located on both sides of the busbar support seat, and upper and lower connecting rods that penetrate the clamping members horizontally and are parallel to each other. The free ends of the connecting rods are connected to the actuator provided with a hydraulic member, and the other end of the actuator is connected to a reaction wall. The system provided by the present invention obtains accurate sliding friction coefficients and force-displacement curves, effectively evaluates the seismic performance of the sliding fitting, and greatly improves the accuracy of the test.

Description

Technical Field

[0001] The present invention relates to a seismic performance detection system for interconnected electrical equipment and a usage method thereof, and more particularly to a seismic performance detection system for sliding fittings in a converter station and a usage method thereof. Background Art

[0002] As an important part of lifeline projects, once the power system fails or is damaged during an earthquake disaster, it will cause immeasurable economic losses. Power outages not only seriously affect normal production, life and earthquake relief work, but also may trigger secondary disasters such as fires, seriously threatening people's lives and property safety.

[0003] The equipment in a substation is connected through tubular busbars or flexible busbars. The supported tubular busbars are mostly connected to insulators by sliding fittings. Such sliding fittings have good damping and energy dissipation effects, and they can reduce the seismic response at the top of the post insulators. When detecting the seismic performance of the interconnected electrical equipment loop with sliding fittings, usually a sliding friction coefficient and the equivalent spring stiffness when the sliding fitting reaches the sliding displacement limit are assumed, and then the sliding fitting is equivalent to a nonlinear spring. By releasing the restrictions on unidirectional displacement and unidirectional rotation to simulate the connection between the sliding fitting and the tubular bus in the actual electrical equipment loop. However, this method has low accuracy and is difficult to be applied to the detection of seismic performance in actual engineering. How to determine the sliding friction coefficient and sliding displacement of the sliding fitting becomes the difficulty of the detection. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a seismic performance detection system for sliding fittings in a converter station and a usage method thereof.

[0005] The technical solution provided by the present invention is as follows:

[0006] A seismic performance detection system for sliding fittings in a converter station, the sliding fitting includes: a horizontal connecting plate, a support plate, a sliding groove, a support shaft and an arc-shaped tubular bus support seat; the system includes: a horizontally arranged actuator, and a fixing member vertically arranged at one end of the actuator; the fixing member includes a limiting member and a fixing frame matching the limiting member; the limiting member includes clamping members located on both sides of the tubular bus support seat, and upper and lower connecting rods horizontally penetrating through the clamping members and parallel to each other; the free ends of the connecting rods are connected to the actuator provided with a hydraulic member, and the other end of the actuator is connected to a reaction wall.

[0007] Further, vertical support legs perpendicular to the arc surface are provided at the lower sides of both ends of the arc-shaped tubular bus support seat. The support legs are provided with a transverse support shaft horizontally perpendicular to and penetrating through the support legs; an ear-shaped connecting member is provided outside the support legs, one end of which is connected to the support leg and the other end is fixedly connected to the connecting plate; the support legs are provided with a sliding groove for the longitudinal sliding of the support shaft.

[0008] Further, the sliding groove is made of a material composed of the following components by mass percentage: Si 0.2 - 0.65, Fe 0.35 - 0.4, Cu 0.1 - 0.12, Mn 0.1 - 0.12, Mg 0.4 - 0.9, Cr 0.1 - 0.12, Zn 0.1 - 0.12, Ti 0.1 - 0.15, and the balance Al.

[0009] Further, the sliding groove is made of a material composed of the following components by mass percentage: Si 0.2 - 0.6, Fe 0.35, Cu 0.1, Mn 0.1, Mg 0.45 - 0.9, Cr 0.1, Zn 0.1, Ti 0.1, and the balance Al.

[0010] Further, fixing rods for fixing the pipe bus support seat are respectively provided on the upper and lower sides of the arc surface of the pipe bus support seat, and the number thereof is at least 6.

[0011] Further, the fixing frame includes an upper fixing frame located on the upper and lower sides of the sliding fitting and a lower fixing frame located below the connecting plate, and holes for the rod to pass through are provided on the fixing frame.

[0012] Further, the lower fixing frame is provided with a longitudinal connecting rod and a connecting rod horizontally passing through the fixing frame.

[0013] Further, the actuator is provided with a force sensor, a displacement sensor, and a data processing module, and the module is connected to a display.

[0014] Further, a washer and a shaft sleeve are successively provided on the end face of the support shaft.

[0015] A method for using a seismic performance detection system for a sliding fitting, the method includes,

[0016] 1) Fix the left and right sides of the pipe bus support seat with vertically arranged clamping members;

[0017] 2) Install the connecting rod horizontally passing through the clamping member and the connecting rod under the pipe bus support seat on the fixing frame;

[0018] 3) Install fixing rods on the upper and lower sides of the arc surface of the pipe bus support seat;

[0019] 4) Connect the free end of the connecting rod to the telescopic rod of the actuator;

[0020] 5) Start the power supply, and the telescopic rod applies a horizontal thrust to the connecting rod;

[0021] 6) The sensor transmits the data to the data processing module, and the processing result is displayed on the display.

[0022] Compared with the closest prior art, the technical solution provided by the present invention has the following beneficial effects:

[0023] (1) An earthquake resistance performance detection system provided by the present invention can perform a low-cycle repeated loading test on the sliding fitting by selecting the accuracy and sampling frequency of the force sensor, and can obtain accurate ultimate bearing capacity and displacement curves of the fitting. The sliding friction coefficient can be accurately calculated from the obtained data, so as to accurately evaluate the earthquake resistance performance of the sliding fitting in the interconnected electrical equipment circuit.

[0024] (2) The usage method provided by the present invention is simple and fast, highly operable, and the experimental results can be transmitted to the display through the data processing module, which is intuitive and reliable, and is suitable for practical engineering applications.

[0025] (3) The earthquake resistance performance detection system provided by the present invention stabilizes the position of the sliding fitting by using a fixing part in cooperation to achieve an accurate limiting function, with small test errors and high accuracy.

[0026] (4) The sliding fitting provided by the present invention has good wear resistance, has little influence on the test, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of a sliding fitting for a converter station provided by the present invention;

[0028] Figure 2 Schematic diagram of an earthquake resistance performance detection system for a sliding fitting of a converter station provided by the present invention;

[0029] Figure 3 Enlarged view of the earthquake resistance performance detection system provided by the present invention;

[0030] Figure 4 Low-cycle repeated loading test provided by the present invention;

[0031] Figure 5 Force-displacement curve when the sliding displacement provided by the present invention is 30 mm;

[0032] Figure 6 Force-displacement curve when the sliding displacement provided by the present invention is 70 mm,

[0033] 0 Ear-shaped connecting piece; 1 Busbar support seat; 2 Support shaft; 3 Support leg; 4 Sliding groove; 5 Connecting plate; 6 Reaction wall; 7 Actuator; 7-1 Telescopic rod; 8 Fixed frame; 9 Sliding fitting; 10 Connecting rod; 11 Clamping space; 12 Fixed rod. DETAILED DESCRIPTION OF THE INVENTION

[0034] The technical solution provided by the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the present invention, rather than all of it.

[0035] To solve the above problems existing in the prior art, the present invention provides a seismic performance test system for a sliding fitting of a converter station and a method for using the same.

[0036] The sliding fitting provided by the present invention is as Figure 1 shown, and includes: a connecting plate 1, a support plate 5, a sliding groove 4, a support shaft 3, and an arc-shaped busbar support seat 1. The axial direction of the busbar support seat 1 is fixedly connected to the busbar; the lower sides of the arc-shaped two ends of the busbar support seat 1 are provided with support legs 3 perpendicular to the arc surface. The support legs 3 are provided with a horizontal transverse support shaft 2 that vertically penetrates the support legs 3; the outer side of the support legs 3 is provided with an ear-shaped connecting member 0 with one end connected to the support legs 3 and the other end fixedly connected to the connecting plate 5; the support legs 3 are provided with a sliding groove 4 for the longitudinal sliding of the support shaft 2.

[0037] The seismic performance detection system provided by the present invention is as Figures 2-3 shown, and includes: an actuator 7 arranged horizontally, and a fixing member perpendicularly arranged at one end of the actuator 7; the fixing member includes a limiting member and a fixing frame 8 that cooperates with the limiting member for fixing; the limiting member includes clamping members 11 located on both sides of the busbar support seat 1, and upper and lower connecting rods 10 that horizontally penetrate the clamping members 11 and are parallel to each other; the upper and lower sides of the busbar support seat 1 along its arc surface are respectively provided with fixing rods 12 for fixing the seat, and the number thereof is at least 6. The fixing frame 8 includes an upper fixing frame located outside the sliding fitting 9 and a lower fixing frame located below the connecting plate 5. The lower fixing frame is provided with a longitudinal connecting rod 10 and a connecting rod 10 that horizontally passes through the fixing frame 8. The fixing frame 8 is provided with holes through which the rods pass; the free end of the connecting rod 10 is connected to the actuator 7 provided with a telescopic rod 7-1, and the other end of the actuator 7 is connected to a reaction wall 6; washers and bushings are sequentially arranged on the end face of the support shaft 2; the actuator 7 is provided with a force sensor, a displacement sensor, and a data processing module connected to a display;

[0038] The sliding groove is made of a material composed of the following components by mass percentage: Si 0.2-0.65, Fe 0.35-0.4, Cu 0.1-0.12, Mn 0.1-0.12, Mg 0.4-0.9, Cr 0.1-0.12, Zn 0.1-0.12, Ti 0.1-0.15, and the balance is Al.

[0039] In the actual project, the connection between the pipe busbar and the pipe bus support base 1 of the sliding fitting provided by the present invention is welded. The support shaft 2 is installed in the support leg sliding groove 4. The pipe bus support base 1 can rotate along the support shaft 2, and the support shaft 2 can slide along the sliding groove 4. The length of the sliding groove 4 is 16 cm. The middle position of the sliding groove 4 is taken as the starting position of the low-cycle repeated loading test. The connecting plate 5 is used to connect with electrical equipment. The lower connecting plate 5 of the fitting 9 is clamped and fixed on the fixing frame 8 through the connecting rod 10. The upper part of the pipe bus support base 1 is fixed by the clamping piece 11 and fixed on the actuator 7 through the horizontally passing connecting rod 10. The acting direction of the actuator 7 forms a 90° angle with the plane of the pipe bus support base. The acting direction of the actuator 7 is consistent with the direction of the sliding groove. The weight of the pipe bus is close to the mass of the pipe busbar on the sliding fitting in the actual process, and its value is about 150 kg. By selecting the accuracy and sampling frequency of the force sensor, the actuator 7 can accurately record the ultimate bearing capacity and displacement curve of the fitting and directly display them through the data processing module connected to the display, which is convenient and fast.

[0040] The usage method of the seismic performance detection system provided by the present invention:

[0041] Place the pipe bus support base 1 in the vertical clamping piece 11. Install the connecting rod 10 horizontally passing through the clamping piece 11 and the connecting rod 10 under the pipe bus support base 1 on the fixing frame 8. Install the fixing rods 12 on the upper and lower arc surfaces of the pipe bus support base 1. Connect the free end of the connecting rod 10 to the telescopic rod 7-1 of the actuator 7. After the installation is completed, start the actuator 7. The telescopic rod 7-1 applies a horizontal thrust to the connecting rod 10. The sensor transmits the data to the data processing module, and the processing result is displayed on the display.

[0042] As Figure 4 shown, the test adopts a displacement-controlled loading system. Loading starts from 0 mm (i.e., the middle position of the sliding groove), the displacement increment is 1 mm, eight cycles are set for each level, and the loading frequency is 0.5 Hz.

[0043] When the sliding displacements of the sliding fitting are 30 mm and 70 mm, the force-displacement curves are respectively as Figure 5 and Figure 6 shown. As Figure 5 shown, taking the restoring forces at the moment of displacement 0 as 0.73 kN and -0.75 kN respectively, taking the sliding friction force of the sliding fitting as 0.74 kN, and the pipe bus weight as 150 kg, according to formula (1), the sliding friction coefficient of the sliding fitting can be obtained as 0.5.

[0044]

[0045] When the fitting slides by 70 mm, the bearing of the sliding fitting has come into contact with the support plate. At this time, the sliding fitting plays a role of limiting position and energy dissipation in the interconnected electrical equipment loop. The restoring force curve is asFigure 6 As shown, it can be seen from the restoring force curve that in the seismic performance calculation of the interconnected electrical equipment loop with sliding fittings, a relatively large spring stiffness can be defined to equivalently represent the limiting function of the sliding fittings.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still modify the specific implementation manners of the present invention or make equivalent substitutions. Any such modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the scope of the claims of the present invention pending approval.

Claims

1. A seismic performance detection system for sliding fittings in a converter station, the sliding fittings comprising: Horizontal connecting plate, support plate, sliding groove, support shaft and arc-shaped tube bus support seat; characterized in that the system includes: a horizontally arranged actuator, a fixing member vertically arranged at one end of the actuator; the fixing member includes a limiting member and a fixing bracket matching the limiting member; the limiting member includes clamping members located on both sides of the tube bus support seat, upper and lower connecting rods horizontally penetrating the clamping members and parallel to each other; the free ends of the connecting rods are connected to the actuator provided with a hydraulic member, and the other end of the actuator is connected to the reaction wall; The fixing bracket includes an upper fixing bracket located on the upper and lower sides of the sliding fitting and a lower fixing bracket located below the connecting plate, and the fixing bracket is provided with holes for the connecting rods to pass through; The actuator is provided with a force sensor, a displacement sensor and a data processing module, and the module is connected to a display; 2. The seismic performance detection system of the sliding fitting according to claim 1, characterized in that, Vertical support legs perpendicular to the arc surface are provided on the lower sides of both ends of the arc-shaped tube bus support seat, and a transverse support shaft horizontally perpendicular and penetrating the support legs is provided on the support legs; an ear-shaped connecting member is provided on the outer side of the support legs, one end of which is connected to the support legs and the other end is fixedly connected to the connecting plate; the support legs are provided with sliding grooves for the longitudinal sliding of the support shaft; 3. The seismic performance detection system for sliding fittings according to claim 1, characterized in that, The sliding groove is made of a material composed of the following components by mass percentage: Si 0.2 -0.65, Fe 0.35-0.4, Cu0.1-0.12, Mn0.1-0.12, Mg0.4-0.9, Cr0.1-0.12, Zn0.1-0.12, Ti0.1-0.15 and the balance Al.

4. The anti-seismic performance detection system for sliding fittings according to claim 3, characterized in that, The sliding groove is made of a material composed of the following components by mass percentage: Si0.2-0.6, Fe 0.35, Cu0.1, Mn0.1, Mg0.45-0.9, Cr0.1, Zn0.1, Ti0.1 and the balance Al.

5. The seismic performance detection system for sliding fittings according to claim 1, characterized in that, Fixing rods for fixing the seat are respectively provided on the upper and lower sides of the arc surface of the tube bus support seat, and the number thereof is at least 6; 6. The seismic performance detection system for sliding fittings according to claim 1, characterized in that The lower fixing bracket is provided with a longitudinal connecting rod and a connecting rod horizontally passing through the fixing bracket; 7. The seismic performance detection system for sliding fittings according to claim 1, characterized in that A washer and a bushing are sequentially provided on the end face of the support shaft; 8. The method for using the seismic performance detection system of the sliding fitting according to claims 1-7, characterized in that, The method includes, 1) Fix the left and right sides of the tube bus support seat with vertically arranged clamping members; 2) Install the connecting rods horizontally passing through the clamping members and the connecting rods under the tube bus support seat on the fixing bracket; 3) Install fixing rods on the upper and lower sides of the arc surface of the tube bus support seat; 4) Connect the free end of the connecting rod to the telescopic rod of the actuator; 5) Start the power supply, and the telescopic rod applies a horizontal thrust to the connecting rod; 6) The sensor transmits the data to the data processing module, and the processing result is displayed on the display.

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