Auxiliary device for flame spread prevention test of bus duct

Abstract

The utility model discloses an auxiliary device for a bus duct flame spread prevention test. The support comprises a rectangular frame and supporting beam structures distributed inside the rectangular frame at equal intervals in the longitudinal direction. A plurality of inverted U-shaped crosspieces are welded on the rectangular frame at equal intervals, symmetrical bracket holes are formed in two long sides, and symmetrical crosspiece holes are formed in each crosspiece, so that a screw rod penetrates through the crosspiece holes, the crosspiece holes are matched with a cover plate, and a bus duct sample is fixed. And one end of the cable is connected with the hanging ring, and the other end of the cable is connected with a motor in the test box body, so that the device is driven by the motor to move along the track, and a bus duct sample enters the test box along with the device and is kept at a vertical position. The utility model has the advantages that through the support holes and the crosspiece holes at different intervals, under the cooperation of the screw rod and the cover plate, the 1T bus duct can be fixed and ensured to smoothly enter the test box for testing in different postures, and various requirements of tests for preventing flame spread are met.

Description

Technical Field

[0001] The utility model relates to an auxiliary device for experiments, specifically an auxiliary device for preventing flame spread test of bus ducts. Background Art

[0002] According to the GB / T 7251.6-2015 standard, the definition of the performance of preventing flame spread is that when the ignition source is removed, the non-flame-spreading busbar trunking system should not be ignited, or if ignited, it should not continue to burn. The test of preventing flame spread of bus ducts is applicable to all models and sizes of busbar trunking units to characterize their performance of no flame spread during actual installation and assembly. The test is carried out in a self-standing box with a width of (1000±100) mm, a depth of (2000±100) mm and a height of (4000±100) mm. The box should be raised above the ground, and the sample should be fixed on a bracket, and then a vertical combustion test should be carried out in the box to verify its performance of preventing flame spread. The sample needs to be tested on three sides.

[0003] However, the specifications of bus duct samples vary from 250A to 6300A, and when the weight is large, it can reach 1T, resulting in it being difficult to place the sample and the steel ladder into the test box by manpower alone, which is time-consuming, laborious and inefficient. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide an auxiliary device that is efficient, reliable and convenient for vertically pulling a bus duct sample into a test box for a combustion test.

[0005] To solve the above technical problem, the auxiliary device for preventing flame spread test of bus ducts of the present invention includes a bracket and wheels. The bracket includes a rectangular frame and a support beam structure evenly distributed longitudinally inside it. Several crossbars are welded at equal intervals on the rectangular frame. Symmetric bracket holes are opened on the two long sides of the rectangular frame, and symmetric crossbar holes are opened on each crossbar. The bracket holes and the crossbar holes are circular for a screw to pass through. The screw cooperates with a cover plate to play a fixing role.

[0006] A baffle is welded at the rear end of the bracket.

[0007] A hanging ring is welded on the outer side of the baffle.

[0008] A cable is pulled out from the motor inside the test box, passes through the gap formed between the lower part of the bracket and the track, and is hung on the hanging ring through a hook.

[0009] The crossbar is in an inverted U shape and the number is three.

[0010] The baffle is a steel plate.

[0011] The hanging ring is a steel ring.

[0012] The advantages of the present utility model are as follows: It can fix and ensure that the busbar trunking with a capacity of 1T smoothly enters the test chamber in different postures for testing, meeting various requirements of the busbar trunking for preventing flame spread test. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of the present utility model;

[0014] Figure 2 is a top view of the present utility model;

[0015] Figure 3 is a plan view of the crossbar of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further elaborates in detail on the mobile device for preventing flame spread test of the busbar trunking of the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0017] As Figure 1 shown, the mobile device for preventing flame spread test of the busbar trunking of the present utility model includes a bracket 1 and two pairs of wheels 2 at the front and rear ends. The bracket 1 includes a rectangular frame and a support beam structure evenly distributed longitudinally inside it. Several crossbars 4 are welded at equal intervals on the rectangular frame. The crossbar 4 is in an inverted U shape composed of two legs and a crossbar. Its function is to enable the busbar trunking sample to have a larger contact area with air compared to being directly placed on the support beam, which is more conducive to ensuring the test effect. Symmetric bracket holes 3 are opened on the two long sides of the rectangular frame, and symmetric crossbar holes 5 are opened on each crossbar 4 for a screw 6 to pass through. The screw 6 cooperates with a cover plate 9 to fix the busbar trunking sample. A baffle 7 is welded at the rear end of the bracket 1, and a hanging ring 8 is welded at the outer end of the baffle 7.

[0018] During use, the auxiliary device is erected on the test track. Subsequently, the busbar trunking sample is horizontally placed in the middle or laterally placed on the crossbar 4 according to the test requirements. After adjusting the position, the screw 6 is passed through the bracket hole 3 or the crossbar hole 5, and then the cover plate 9 is passed through the other end of the screw 6 to clamp and fix the busbar trunking sample. Then, the cable is pulled out from the motor inside the test chamber, passed through the gap formed between the lower part of the bracket 1 and the track, and hung on the hanging ring 8 through a hook. Driven by the motor, the cable will pull the device to move along the track, enabling the busbar trunking sample to enter the test chamber accordingly. After arriving and using the motor at the top of the test device to lift the other end of the auxiliary device, the two work together to enable the busbar trunking sample to be fixed and maintain a vertical position therein.

[0019] Certainly, the above description is not a limitation to the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the essence of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An auxiliary device for a busbar trunking flame spread prevention test, comprising a bracket (1) and wheels (2), characterized in that: The bracket (1) includes a rectangular frame and a support beam structure evenly distributed longitudinally inside it. Several crossbars (4) are welded at equal intervals on the rectangular frame, and symmetrical bracket holes (3) are opened on both long sides. Symmetrical crossbar holes (5) are opened on each crossbar (4). The bracket holes (3) and the crossbar holes (5) are circular for a screw rod (6) to pass through. The screw rod (6) cooperates with a cover plate (9) to fix the busbar sample.

2. The auxiliary device for the busbar flame spread prevention test according to claim 1, characterized in that: A baffle (7) is welded at the rear end of the bracket (1).

3. The auxiliary device for the busbar trunking flame spread prevention test according to claim 2, wherein: A hanging ring (8) is welded on the outer side of the baffle (7).

4. The auxiliary device for the busbar trunking flame spread prevention test according to claim 3, wherein: The cable is pulled out from the motor in the test box body, passes through the gap formed between the lower part of the bracket (1) and the track, and is hung on the hanging ring (8) through a hook.

5. The auxiliary device for the busbar trunking flame spread prevention test according to claim 1, characterized in that: The crossbar (4) is in an inverted U shape composed of two legs and a crossbar, and the number is three.

6. The auxiliary device for the busbar trunking flame spread prevention test according to claim 2, characterized in that: The baffle (7) is made of steel plate.

7. The auxiliary device for the busbar trunking flame spread prevention test according to claim 3, wherein: The hanging ring (8) is made of steel ring.

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