Heating device suitable for thermal power consumption test of low-voltage switchgear assembly

Abstract

The utility model discloses a heating device suitable for a thermal power consumption test of a low-voltage switchgear assembly, which comprises a plurality of mounting plates mounted on a telescopic parallel connecting rod mechanism, and two ends of the upper surface of each mounting plate are respectively provided with a connecting column. The two ends of the heating resistor are assembled on the two connecting columns at the two ends of the same mounting plate, the two adjacent connecting columns on the same side are connected with each other through an insulated wire, and the two connecting columns of the mounting plate at the leftmost end are connected with a test power supply through a connecting wire. According to the utility model, the heating resistors are assembled on the connecting columns at the two ends of the mounting plate, the mounting plate is mounted on the parallel connecting rod mechanism, and the heating resistors can be uniformly distributed in the cabinet body of the switch equipment through the extension and retraction of the parallel connecting rod mechanism, so that each part of the cabinet body is uniformly heated in the heating process; and the accuracy of the thermal power consumption test of the cabinet shell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switch equipment detection, in particular to a heating device suitable for thermal power consumption test of low-voltage complete switch equipment. Background Art

[0002] According to the requirements of clause 10.10.4.2.2 of standard GB / T7251.1-2023 "Low-voltage complete switchgear and control equipment": The power loss of the enclosure is determined by testing, and the power loss of the enclosure can be simulated using a heating resistor that generates the same amount of heat. The heating resistor is evenly distributed on the top of the enclosure and installed in an appropriate position inside the enclosure. The cross-section of the lead connected to the heating resistor should not transfer significant heat out of the enclosure. In actual operation, due to the size limitations of the switchgear cabinet, larger heating resistors cannot be installed in the cabinet; after a heating resistor is installed in the cabinet and powered on, the cabinet enclosure near the heating resistor and the cabinet enclosure far away from the heating resistor are heated unevenly, resulting in inaccurate test measurement results. Utility Model Content

[0003] The utility model aims to provide a heating device suitable for thermal power consumption test of low-voltage complete switchgear, which utilizes a plurality of heating resistors installed on a parallel connecting rod mechanism to simulate the thermal power consumption of the test product to meet the requirements of the standard.

[0004] In order to solve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0005] A heating device suitable for thermal power consumption test of low-voltage complete switchgear comprises several mounting plates mounted on a retractable parallel linkage mechanism, a connecting column is respectively mounted on both ends of the upper surface of each mounting plate, both ends of a heating resistor are assembled on two connecting columns at both ends of the same mounting plate, two adjacent connecting columns on the same side are connected to each other through an insulated wire, and the two connecting columns of the leftmost mounting plate are connected to a test power supply through a connecting wire.

[0006] Preferably, a glass fiber sleeve is installed on the outer wall of the insulated wire.

[0007] Preferably, the parallel linkage mechanism includes several mutually parallel horizontal links, several upper oblique links and several lower oblique links, each horizontal link is placed between two adjacent mounting plates, and several hinge holes are opened on the mounting plates. The front and rear ends of each horizontal link are respectively hinged to one end of the two upper oblique links and the other end of the two lower oblique links, the other end of the two upper oblique links is hinged to the adjacent mounting plate located on the left side of the horizontal link through a pin, and the other end of the two lower oblique links is hinged to the adjacent mounting plate located on the right side of the horizontal link through a pin, and the pin passes through the hinge hole on the mounting plate.

[0008] Preferably, an L-shaped mounting seat is installed at the bottom of the front and rear ends of the mounting plates at the left and right ends, respectively, and a plurality of hooks are installed on the outer side walls of the mounting seat, and the hooks are adapted to the connection holes on the inner side of the switchgear cabinet.

[0009] Preferably, the connecting column is made of ceramic material.

[0010] Preferably, the insulated wire is a flame retardant insulated wire.

[0011] When the utility model is in use, according to the test requirements, the operator assembles the experimental heating resistor onto the connecting column, connects the adjacent connecting columns on the same side through the insulated wire, and then hangs the utility model into the switchgear cabinet through the hook on the outer wall of the mounting seat. The heating resistor is evenly distributed in the cabinet. The utility model is connected to the test power supply through the connecting wire, and the thermal power consumption test of the low-voltage complete switchgear can be carried out.

[0012] The beneficial effects of the utility model are as follows:

[0013] (1) The utility model installs the heating resistors on the connecting columns at both ends of the mounting plate, and the mounting plate is installed on the parallel linkage mechanism. Through the extension and retraction of the parallel linkage mechanism, the heating resistors can be evenly distributed in the cabinet of the switchgear, ensuring that each shell part of the cabinet is evenly heated during the heating process, thereby improving the accuracy of the heat power consumption test of the cabinet shell;

[0014] (2) In the utility model, multiple heating resistors are connected in parallel using insulated wires, and a glass fiber sleeve is set on the outer wall of the insulated wire, which further enhances the insulation performance of the heating resistor and improves the reliability of the experimental equipment;

[0015] (3) In the present invention, mounting seats with hooks are installed at the bottom of the front and rear ends of the two mounting plates on the left and right sides. The present invention can be quickly installed on the connecting holes in the cabinet through the hooks, which not only ensures the uniform arrangement of the heating resistors, but also improves the convenience and reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 Structural diagram of the parallel linkage mechanism;

[0018] Figure 3 It is the circuit principle diagram used in the utility model;

[0019] In the figure: 1. mounting base, 2. connecting column, 3. heating resistor, 4. parallel linkage mechanism, 5. connecting wire, 6. insulated wire, 7. mounting plate, 8. horizontal connecting rod, 9. upper oblique connecting rod, 10. lower oblique connecting rod, 11. hinge hole, 12. hook. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] like Figures 1 to 3 A heating device suitable for thermal power consumption test of low-voltage complete switchgear shown in the figure comprises several mounting plates 7 mounted on a retractable parallel linkage mechanism 4, a connecting column 2 is respectively mounted at both ends of the upper surface of each mounting plate 7, both ends of a heating resistor 3 are mounted on two connecting columns 2 at both ends of the same mounting plate 7, two adjacent connecting columns 2 on the same side are connected to each other through an insulated wire 6, and the two connecting columns 2 of the leftmost mounting plate 7 are connected to the test power supply through a connecting wire 5.

[0022] A glass fiber sleeve is installed on the outer wall of the insulated conductor 6.

[0023] The parallel linkage mechanism 4 includes several mutually parallel horizontal links 8, several upper oblique links 9 and several lower oblique links 10. Each horizontal link 8 is placed between two adjacent mounting plates 7. Several hinge holes 11 are opened on the mounting plate 7. The front and rear ends of each horizontal link 8 are respectively hinged to one end of the two upper oblique links 9 and the other end of the two lower oblique links 10. The other end of the two upper oblique links 9 is hinged to the adjacent mounting plate 7 located on the left side of the horizontal link 8 through a pin, and the other end of the two lower oblique links 10 is hinged to the adjacent mounting plate 7 located on the right side of the horizontal link 8 through a pin, and the pin passes through the hinge hole 11 on the mounting plate 7.

[0024] An L-shaped mounting seat 1 is respectively installed at the bottom of the front and rear ends of the mounting plates 7 at the left and right ends. A plurality of hooks 12 are installed on the outer wall of the mounting seat 1. The hooks 12 are adapted to the connection holes on the inner side of the switch cabinet.

[0025] The connecting column 2 is made of ceramic material.

[0026] The insulated wire 6 is a flame retardant insulated wire.

[0027] When the utility model is in use, according to the test requirements, the operator assembles the experimental heating resistor 3 onto the connecting column 2, connects the adjacent connecting columns 2 on the same side through the insulated wire 6, and then hangs the utility model into the switchgear cabinet through the hook 12 on the outer wall of the mounting base 1. The heating resistor 3 is evenly distributed in the cabinet. The utility model is connected to the test power supply through the connecting wire 5, and the thermal power consumption test of the low-voltage complete switchgear can be carried out.

[0028] The utility model assembles heating resistors on connecting columns at both ends of a mounting plate, and the mounting plate is mounted on a parallel connecting rod mechanism. Through the expansion and contraction of the parallel connecting rod mechanism, the heating resistors can be evenly distributed in the cabinet of the switch device, thereby ensuring that all parts of the cabinet are evenly heated during the heating process, and improving the accuracy of the thermal power consumption test of the cabinet shell.

[0029] The above are only preferred examples of the present invention. It should be noted that for ordinary technicians in this field, under the technical enlightenment provided by the present invention, other equivalent deformations and improvements can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A heating device suitable for thermal power consumption test of low voltage complete switchgear, characterized in that: The invention comprises a plurality of mounting plates (7) mounted on a retractable parallel linkage mechanism (4), wherein a connecting column (2) is respectively mounted at both ends of the upper surface of each mounting plate (7), and both ends of the heating resistor (3) are mounted on two connecting columns (2) at both ends of the same mounting plate (7), and two adjacent connecting columns (2) on the same side are connected to each other through an insulated wire (6), and the two connecting columns (2) of the leftmost mounting plate (7) are connected to a test power supply through a connecting wire (5).

2. The heating device suitable for thermal power consumption test of low-voltage complete switchgear according to claim 1 is characterized in that: A glass fiber sleeve is installed on the outer wall of the insulated wire (6).

3. The heating device suitable for thermal power consumption test of low-voltage complete switchgear according to claim 1 or 2, characterized in that: The parallel link mechanism (4) comprises a plurality of mutually parallel horizontal links (8), a plurality of upper oblique links (9) and a plurality of lower oblique links (10), each horizontal link (8) being disposed between two adjacent mounting plates (7), the mounting plates (7) being provided with a plurality of hinge holes (11), the front and rear ends of each horizontal link (8) being hinged to one end of the two upper oblique links (9) and the other ends of the two lower oblique links (10) respectively, the other ends of the two upper oblique links (9) being hinged to the adjacent mounting plate (7) located on the left side of the horizontal link (8) via a pin, the other ends of the two lower oblique links (10) being hinged to the adjacent mounting plate (7) located on the right side of the horizontal link (8) via a pin, and the pin passing through the hinge hole (11) on the mounting plate (7).

4. The heating device suitable for thermal power consumption test of low-voltage complete switchgear according to claim 3 is characterized in that: An L-shaped mounting seat (1) is respectively installed at the bottom of the front and rear ends of the mounting plates (7) at the left and right ends, and a plurality of hooks (12) are installed on the outer wall of the mounting seat (1), and the hooks (12) are adapted to the connection holes on the inner side of the switchgear cabinet.

5. The heating device suitable for thermal power consumption test of low-voltage complete switchgear according to claim 4 is characterized in that: The connecting column (2) is made of ceramic material.

6. The heating device suitable for thermal power consumption test of low-voltage complete switchgear according to claim 5 is characterized in that: The insulated wire (6) is a flame-retardant insulated wire.

Images