Large-current temperature rise test device for inflatable switch cabinet

Abstract

The utility model discloses a large-current temperature rise test device for an inflatable switch cabinet, and solves the technical problems of high cost and complex installation or large calorific value and high loss during large-current transmission caused by the fact that a temperature rise test method often adopts an insulating tube bus or a cable to perform a connection test. The connector comprises a T2 copper conductor tube, a connecting terminal, a contact assembly, two aluminum check rings and an insulating flange plate, one end of the T2 copper conductor tube is crimped into a terminal form, the other end of the T2 copper conductor tube is connected with the contact assembly, a center hole is formed in the insulating flange plate, and the T2 copper conductor tube penetrates through the center hole of the insulating flange plate; the two aluminum check rings are fixedly connected to the outer wall of the T2 copper conductor tube in a sleeving mode, large current flows into the inflatable switch cabinet from a power source through the connecting terminal, the T2 copper conductor tube and the contact assembly, and temperature rise data of the inflatable switch cabinet can be obtained by detecting temperature changes of the T2 copper conductor tube, the contact assembly and other parts in the test process. And the heat dissipation performance and the heating condition are evaluated.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical test equipment, concretely relates to a kind of large current temperature rise test device for inflatable switch cabinet. BACKGROUND

[0002] In the research and development and quality detection process of electrical equipment, temperature rise test is the key link to evaluate its heat generation and heat dissipation performance when running.For inflatable switch cabinet, the traditional temperature rise test method often uses insulated tube or cable for connection test, but these ways have many drawbacks.When using insulated tube for testing, the cost is high and the installation is complex;When using cable for testing, there are problems such as high heat generation, high loss and high requirement for test environment during large current transmission, resulting in high test cost and low test efficiency.

[0003] Therefore, a new large current temperature rise test device is needed to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the technical problems that the traditional temperature rise test method often uses insulated tube or cable for connection test, resulting in high cost and complex installation or high heat generation and high loss during large current transmission, and provides a large current temperature rise test device for inflatable switch cabinet.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A large current temperature rise test device for inflatable switch cabinet, characterized by comprising T2 copper conductor pipe, connecting terminal, contact assembly, two aluminum check rings and insulation flange plate;

[0007] One end of the T2 copper conductor pipe is crimped with the connecting terminal, which is connected with the large current test power supply or load device through the connecting terminal, and the other end is connected with the contact assembly through sliding connection, the contact assembly is used for transmitting current, and the T2 copper conductor pipe is used for transmitting current and conducting heat;Select appropriate size of copper pipe, its length is determined according to test requirements, and connect large current test power supply or load device through connecting terminal.

[0008] The other end of the T2 copper conductor pipe is connected with the contact assembly through sliding connection, which is convenient for installation and disassembly of the contact assembly.

[0009] A central hole is formed in the insulation flange plate, and the T2 copper conductor pipe passes through the central hole of the insulation flange plate.

[0010] Two aluminum check rings are respectively fixed on the outer wall of the T2 copper conductor pipe and tightly attached to the two sides of the insulation flange plate, which is used for fixing and clamping the insulation flange plate.

[0011] The insulating flange plate is used for connecting the inner conical sleeve mounting surface of the gas-filled switch cabinet.

[0012] In the temperature rise test of the gas-filled switch cabinet, a large current flows into the interior of the gas-filled switch cabinet from a power supply through a soft connection, a T2 copper conductor pipe and a contact assembly, and the temperature change of the T2 copper conductor pipe and the contact assembly in the test process is detected, so that the temperature rise data of the gas-filled switch cabinet are obtained, and the heat dissipation performance and heating condition of the gas-filled switch cabinet are evaluated.

[0013] Further, n threaded holes are formed in the radial direction of the T2 copper conductor pipe on each aluminum retaining ring, wherein n is greater than or equal to 3, one fastening screw is connected in each threaded hole on each aluminum retaining ring, and each fastening screw is used to abut against the outer wall of the T2 copper conductor pipe.

[0014] Further, the surface of the T2 copper conductor pipe is covered with an oxidation-resistant layer, which has good electrical conductivity and corrosion resistance.

[0015] Further, the oxidation-resistant layer is a silver layer or a tin layer.

[0016] Further, the thickness of the silver layer is not less than 8 um, or the thickness of the tin layer is not less than 20 um.

[0017] Further, the contact assembly comprises a plurality of layers of copper alloy watchbands, adjacent two layers of the copper alloy watchbands are welded, and an inner layer of the copper alloy watchbands is slidably connected to the T2 copper conductor pipe as a watchband contact finger.

[0018] Further, the contact assembly comprises a plurality of layers of copper alloy watchbands, adjacent two layers of the copper alloy watchbands are riveted, and an inner layer of the copper alloy watchbands is slidably connected to the T2 copper conductor pipe as a watchband contact finger.

[0019] The width, thickness and number of layers of the copper alloy watchbands are designed according to the size of the large current to be borne, so as to ensure that the contact resistance of the contact assembly is minimized and the structure is stable when a large current passes through.

[0020] Further, the contact assembly is a spring contact finger, and the spring contact finger is slidably connected to the T2 copper conductor pipe.

[0021] Further, the connecting terminal is a flat terminal, which is used for connecting a large current test power supply or a load device through a soft connection to realize close lapping and ensure good electrical connection.

[0022] The utility model discloses beneficial effects:

[0023] 1. The utility model discloses a kind of large-current temperature rise test devices for inflatable switch cabinet, adopt T2 copper conductor tube as conductor, compared with the temperature rise test of traditional adoption insulated pipe or cable, the device significantly reduces test cost, improves the versatility and installation convenience of test device.

[0024] 2, the utility model discloses a kind of large-current temperature rise test devices for inflatable switch cabinet, the surface of T2 copper conductor tube is covered with antioxidant layer, with good conductivity and corrosion resistance.

[0025] 3, the utility model discloses a kind of large-current temperature rise test devices for inflatable switch cabinet, simple structure, reasonable in design, effectively solve the problems, such as high temperature rise test cost of inflatable switch cabinet, complex operation, with broad application prospect. DRAWINGS

[0026] Figure 1 It is the sectional view of the utility model for the large-current temperature rise test device for inflatable switch cabinet embodiment one;

[0027] Figure 2 It is the structural schematic diagram of aluminium baffle ring in the utility model for the large-current temperature rise test device for inflatable switch cabinet embodiment one;

[0028] Figure 3 It is the structural schematic diagram of the utility model for the large-current temperature rise test device for inflatable switch cabinet embodiment two installation on inflatable switch cabinet.

[0029] In the figure, 1-T2 copper conductor tube, 2-connection terminal, 3-contact assembly, 4-aluminium baffle ring, 5-insulating flange. DETAILED DESCRIPTION

[0030] The technical scheme of the utility model will be described clearly and completely in connection with the drawings and embodiments, obviously, the described embodiment is only a part of the embodiment of the utility model, not all embodiments. Based on the embodiment of the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of the utility model protection.

[0031] Embodiment one

[0032] The utility model discloses a kind of large-current temperature rise test devices for inflatable switch cabinet, as shown in Figure 1 It includes T2 copper conductor tube 1, connection terminal 2, contact assembly 3, two aluminium baffle rings 4 and insulating flange 5;

[0033] The T2 copper conductor pipe 1, as a main current transmission component, has good electrical conductivity and heat conduction, can withstand the passing of large current and effectively conduct heat; the copper pipe of appropriate specification (the diameter of the copper pipe changes with the size of the current) is selected, the length thereof is determined according to the test requirement, the surface is covered with an anti-oxidation layer, the anti-oxidation layer is a tin layer / silver layer, and can be covered on the surface of the T2 copper conductor pipe 1 by electroplating; when the anti-oxidation layer is a silver layer, the thickness is not less than 8 um, and when the anti-oxidation layer is a tin layer, the thickness is not less than 20 um, so as to reduce the increase of the resistance and the aggravation of the heating due to oxidation when the large current passes, and has good electrical conductivity and corrosion resistance.

[0034] The connecting terminal 2 is crimped at one end of the T2 copper conductor pipe 1, and the end is made into a terminal shape by a flattening process, so as to be soft-connected with an external large-current test power supply or load device, thereby realizing reliable connection with the external large-current test power supply or load device.

[0035] The contact assembly 3 is connected at the other end of the T2 copper conductor pipe 1, and is designed in a multi-layer copper alloy watchband manner, the adjacent two layers of copper alloy watchbands are welded or riveted, and the inner layer of copper alloy watchband is used for sliding connection of the T2 copper conductor pipe 1 by the watchband contact finger. The watchband type contact can keep low contact resistance when a large current contacts, reduce heating, and at the same time ensure stable transmission of the current.

[0036] The two aluminum retaining rings 4 are respectively fixedly sleeved on the outer wall of the T2 copper conductor pipe 1 and tightly attached to the two sides of the insulating flange plate 5, and are used for fixing and clamping the insulating flange plate 5; the aluminum retaining ring 4 plays a supporting and positioning role on the T2 copper conductor pipe 1, so that the whole test device can be conveniently installed at the test interface of the inflatable switch cabinet.

[0037] The insulating flange plate 5 is made of epoxy resin material and has high strength and good insulation performance, and the two sides are tightly clamped by the two aluminum retaining rings 4 and the aluminum retaining rings 4 are fixed by bolts.

[0038] The T2 copper conductor pipe 1 is used for transmitting current and conducting heat.

[0039] A center hole is formed in the insulating flange plate 5, the T2 copper conductor pipe 1 passes through the center hole of the insulating flange plate 5, and the T2 copper conductor pipe 1 is connected to the inner cone sleeve pipe mounting surface of the inflatable switch cabinet through the insulating flange plate 5.

[0040] In the embodiment, as shown in Figure 2 Each aluminum retaining ring 4 is provided with four threaded holes in the radial direction of the T2 copper conductor pipe 1, each aluminum retaining ring 4 is connected with a fastening screw in each threaded hole, and each fastening screw is used for abutting against the outer wall of the T2 copper conductor pipe 1; the aluminum retaining ring 4 is fixedly connected with the T2 copper conductor pipe 1 by adjusting the fastening screws.

[0041] Example two

[0042] The difference between example two and example one is that the contact assembly 3 adopts spring contact fingers, the spring contact fingers are slidingly connected with the T2 copper conductor pipe 1, and the rest structure is the same as that of example one.

[0043] As shown in Fig. 1, the T2 copper conductor pipe 1 is connected with the inner cone sleeve pipe mounting surface of the gas-filled switch cabinet through the insulating flange 5. Figure 3

[0044] When the temperature rise test of the gas-filled switch cabinet is carried out, the large current flows into the interior of the gas-filled switch cabinet from the external large current test power supply or load equipment through the connecting terminal 2, the T2 copper conductor pipe 1 and the contact assembly 3, and the temperature change of the T2 copper conductor pipe 1 and the contact assembly 3 and other parts in the test process is detected, so that the temperature rise data of the gas-filled switch cabinet can be obtained, and the heat dissipation performance and heating condition of the gas-filled switch cabinet can be evaluated.

[0045] The above is only a specific embodiment of the present application, and the effect of the related specific embodiment and the comparative example is compared, but the protection scope of the present application is not limited to this, any change or replacement within the technical range disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.​

Claims

1. A large current temperature rise test device for an air-insulated switchgear, characterized by: The T2 copper conductor pipe (1), the connecting terminal (2), the contact assembly (3), two aluminum check rings (4) and the insulating flange (5) are included. One end of the T2 copper conductor pipe (1) is crimped with the connecting terminal (2), and the other end is slidably connected with the contact assembly (3), and the T2 copper conductor pipe (1) is used for transmitting current and conducting heat. A central hole is formed in the insulating flange (5), and the T2 copper conductor pipe (1) passes through the central hole of the insulating flange (5). Two aluminum check rings (4) are respectively fixedly sleeved on the outer wall of the T2 copper conductor pipe (1) and are respectively attached to the two sides of the insulating flange (5) for fixing and clamping the insulating flange (5). The insulating flange (5) is used for connecting the inner cone sleeve pipe mounting surface of the gas-filled switch cabinet.

2. The large current temperature rise test device for the inflatable switchgear cabinet according to claim 1, characterized in that: n threaded holes are formed in each aluminum check ring (4) along the radial direction of the T2 copper conductor pipe (1), wherein n is greater than or equal to 3, one fastening screw is connected in each threaded hole of each aluminum check ring (4), and each fastening screw is used to push against the outer wall of the T2 copper conductor pipe (1).

3. The large current temperature rise test device for the inflatable switchgear cabinet according to claim 1, characterized in that: The surface of the T2 copper conductor pipe (1) is covered with an anti-oxidation layer.

4. The large current temperature rise test device for the inflatable switchgear cabinet according to claim 3, characterized in that: The anti-oxidation layer is a silver layer or a tin layer.

5. The high current temperature rise test device for the gaseous switchgear according to claim 3 or 4, characterized in that: The anti-oxidation layer is a silver layer with a thickness of not less than 8um, or the anti-oxidation layer is a tin layer with a thickness of not less than 20um.

6. The large current temperature rise test device for the inflatable switchgear cabinet according to claim 1, characterized in that: The contact assembly (3) includes a plurality of layers of copper alloy watchbands, and adjacent two layers of the copper alloy watchbands are welded, and the inner layer of the copper alloy watchband is slidably connected with the T2 copper conductor pipe (1) as a watchband contact finger.

7. The device for testing the temperature rise of a large current for an air-filled switchgear cabinet according to claim 1, characterized in that: The contact assembly (3) includes a plurality of layers of copper alloy watchbands, and adjacent two layers of the copper alloy watchbands are riveted, and the inner layer of the copper alloy watchband is slidably connected with the T2 copper conductor pipe (1) as a watchband contact finger.

8. The large current temperature rise test device for the inflatable switchgear cabinet according to claim 1, characterized in that: The contact assembly (3) is a spring contact finger, and the spring contact finger is slidably connected with the T2 copper conductor pipe (1).

9. The device for testing temperature rise of large current for air-insulated switchgear according to claim 1, characterized in that: The connecting terminal (2) is a flat terminal used for soft connection of a large current test power supply or a load device.

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