Bunched cable combustion test device

Abstract

The utility model relates to the technical field of cable testing, in particular to a bunched cable combustion test device, which comprises a sample holder, a combustion chamber and a combustion chamber, the device further comprises at least one group of clamping mechanisms which are arranged on the sample holder and are used for clamping the cable. Each clamping mechanism comprises two movable plates which are oppositely arranged on the sample holder, and the clamping blocks are arranged on the surface of the movable plate at intervals in the length direction of the movable plate. According to the utility model, the movable plates which are matched in pairs are arranged on the sample holder, and the plurality of clamping blocks are arranged on the movable plates at intervals along the length direction of the movable plates, so that the two movable plates can be driven to move relatively by operating the driving structure, and the clamping blocks on the two movable plates are matched with each other to fix cables on the sample holder side by side; therefore, the cables can be clamped and positioned in batches, the efficiency is high, and the test period can be effectively shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable test technical field especially relates to a bunch of cable combustion test device. BACKGROUND

[0002] Since the bunch of cables are usually densely arranged in actual installation, once a single cable burns, it may ignite the surrounding cables, leading to rapid spread of flame, therefore, the bunch of cables are tested by combustion test, so as to evaluate the combustion characteristics, flame spreading ability and harmfulness of combustion products of the cable under fire conditions, which is of great significance for verifying the effectiveness of the flame retardant additives, sheaths or insulation layers of the cable material, such as Figure 1 and Figure 2 As shown, when the prior art tests the bunch of cables, a sample holder is used to fix the multiple bunch of cables side by side, then the sample holder is placed into a test box, a burning assembly is used to burn them, the harmful smoke generated by burning is discharged from the test box through an exhaust assembly and filtered in a filtering system, and finally discharged into the air.

[0003] Among them, the operation steps of the sample holder fixing the cable are: first, place the sample holder horizontally on the ground, then one worker puts the cable on the sample holder and keeps it still, another worker uses a steel wire to pass through the cable and the sample holder and enclose them, and finally uses a vise to clamp the two ends of the steel wire and rotates, so as to tighten the steel wire and fix the cable, a plurality of cables (usually 8-10) need to be fixed on the sample holder for one test, since each cable is fixed separately, when the number of cables is large, it usually takes 15-20 minutes, which is time-consuming and laborious, and the efficiency is low. SUMMARY

[0004] Therefore, the utility model aims at providing a bunch of cable combustion test device to solve the technical problem of low efficiency of the prior art when fixing a batch of cables.

[0005] In order to achieve the above purpose, the utility model provides a bunch of cable combustion test device, which comprises:

[0006] A sample holder, the sample holder has a bearing surface for supporting the cable;

[0007] The device further comprises at least one set of clamping mechanism arranged on the sample holder for clamping the cable, the clamping mechanism comprises:

[0008] Two movable plates arranged in an opposite manner on the sample holder;

[0009] A plurality of clamping blocks are arranged on the surface of the movable plate along the length direction of the movable plate, the clamping blocks are provided with clamping grooves matched with the outer contour of the cable cross section, and the clamping blocks on one movable plate can cooperate with the clamping blocks on the other movable plate to clamp the cables on the bearing surface.

[0010] A driving structure is arranged for driving the two movable plates to move towards or away from each other to clamp or release the cables on the bearing surface by the clamping blocks on the two movable plates.

[0011] As a preferred technical scheme of the utility model, the driving structure comprises:

[0012] A support fixedly connected with the sample holder;

[0013] A bidirectional threaded rod rotationally connected with the support, the two ends of the bidirectional threaded rod are threadedly matched with the threaded grooves arranged on the surface of the movable plate, and the two movable plates can be driven to move towards or away from each other by rotating the bidirectional threaded rod.

[0014] As a preferred technical scheme of the utility model, the bidirectional threaded rod is threadedly connected with a locking nut on the side close to the support.

[0015] As a preferred technical scheme of the utility model, at least one pre-positioning assembly for pre-positioning the cables on the bearing surface is further arranged on the sample holder.

[0016] As a preferred technical scheme of the utility model, the pre-positioning assembly comprises:

[0017] A positioning sleeve provided with a positioning groove, one end of the positioning sleeve is fixedly arranged on the sample holder;

[0018] A movable clamp movably arranged in the positioning groove;

[0019] A spring arranged in the positioning groove and fixedly connected with the movable clamp at one end, the spring is used for pushing the movable clamp to clamp the cables in cooperation with the inner wall of the positioning groove.

[0020] As a preferred technical scheme of the utility model, the upper end of the sample holder is provided with a hook rod, the hook rod is used for cooperating with the lifting hook in the test box to lift the sample holder.

[0021] As a preferred technical scheme of the utility model, the sample holder is provided with a plurality of support rods at the end close to the inner wall of the test box, so that the support rods can abut against the inner wall of the test box in the lifted state of the sample holder, thereby maintaining the stability of the sample holder.

[0022] As a preferred technical scheme of the utility model, the clamping mechanism and the pre-positioning assembly are both provided with two groups to limit the two ends of the cables respectively.

[0023] The utility model discloses the beneficial effect has: the utility model discloses through setting up the movable plate of pair cooperation on the sample holder, and a plurality of clamping blocks are arranged on the movable plate along its length direction interval, can drive two movable plates relative movement through the operation drive structure, and then make the clamping block on two movable plates mutually cooperate and fix the cable side by side on the sample holder, can realize batch to the cable and hold positioning therefore, and the efficiency is higher, can effectively shorten the test cycle. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following will be further detailed to the utility model with specific examples.

[0025] Figure 1 It is the internal three-dimensional structure schematic diagram of the utility model;

[0026] Figure 2 It is the internal main view structure schematic diagram of the utility model;

[0027] Figure 3 It is the sample holder three-dimensional structure schematic diagram of the utility model;

[0028] Figure 4 It is the Figure 3 Enlarged structure schematic diagram of A place in the utility model;

[0029] Figure 5 It is the Figure 3 Enlarged structure schematic diagram of B place in the utility model.

[0030] Marked as in the drawing: 1, test box;2, combustion assembly;3, exhaust assembly;4, lifting hook;5, sample holder;6, hook rod;7, movable plate;8, clamping block;9, support;10, two-way threaded rod;11, threaded groove;12, cable;13, locking nut;14, positioning sleeve;15, positioning groove;16, movable clamp;17, spring;18, support rod. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following will be further detailed to the utility model with specific examples.

[0032] It should be noted that, unless otherwise defined, technical or scientific terms used in the present application should be understood as their common meanings to those skilled in the art to which the present application belongs. The terms "first", "second" and similar words used in the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "including" or "containing" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. The terms "connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0033] As shown in Figure 3 A bundled cable burning test device includes a sample holder 5 having a bearing surface for supporting cables 12. The device further includes at least one set of clamping mechanisms arranged on the sample holder 5 for clamping the cables 12. The clamping mechanisms include two movable plates 7 arranged in an opposite manner on the sample holder 5. A plurality of clamping blocks 8 are arranged on the surface of the movable plates 7 in the length direction of the movable plates 7. The clamping blocks 8 are provided with clamping grooves matched with the outer contour of the cross section of the cables 12. The clamping blocks 8 on one movable plate 7 can cooperate with the clamping blocks 8 on the other movable plate 7 to form a clamping on the cables 12. A driving structure is used to drive the two movable plates 7 to move towards or away from each other, so that the two movable plates 7 drive the clamping blocks 8 to clamp or release all the cables 12 on the bearing surface.

[0034] The above technical solution can batch fix the cables 12 on the sample holder 5. During use, the sample holder 5 is first placed horizontally. The driving structure is operated to drive the two movable plates 7 to move relative to each other, so that the two movable plates 7 drive the respective clamping blocks 8 to move synchronously. The space between the clamping grooves of the clamping blocks 8 on the two movable plates 7 is slightly larger than the outer diameter of the cables 12. The cables 12 are sequentially placed on the bearing surface of the sample holder 5 and pass through the clamping grooves of the clamping blocks 8. After all the cables 12 are operated according to the above steps, the driving structure is controlled to drive the two movable plates 7 to move towards each other, so that the clamping blocks 8 on the two movable plates 7 move towards each other, thereby clamping the cables 12. Subsequently, the sample holder 5 loaded with the cables 12 is placed in the test box 1 and vertically hung and fixed, and the burning test can be performed. Since a plurality of clamping blocks 8 are arranged on each movable plate 7, synchronous clamping of the batch of cables 12 can be achieved, and each cable 12 does not need to be fixed separately, so the efficiency is higher.

[0035] As shown in Figure 3 and Figure 4As shown, in this embodiment, the driving structure includes: a bracket 9 fixedly connected to the sample holder 5; a bidirectional threaded rod 10 rotatably connected to the bracket 9, the two ends of the bidirectional threaded rod 10 being threadedly engaged with threaded grooves 11 formed on the surface of the movable plate 7, and the two movable plates 7 can be moved towards each other or away from each other by rotating the bidirectional threaded rod 10; preferably, one end of the bidirectional threaded rod 10 is provided with a handle.

[0036] The above technical solution can drive the two movable plates 7 to move relative to each other. In use, by rotating the handle at one end of the bidirectional threaded rod 10, the bidirectional threaded rod 10 is driven to rotate. The bidirectional threaded rod 10 cooperates with the threaded groove 11 on the surface of the movable plate 7, thereby driving the two movable plates 7 to move synchronously. When the two movable plates 7 move towards each other, the clamping blocks 8 on the movable plates 7 will move closer to each other to tighten the cable 12 and achieve clamping of the cable 12. Conversely, when the two movable plates 7 move away from each other, the clamping blocks 8 on the movable plates 7 will move away from each other to release the cable 12 and achieve release of the cable 12.

[0037] like Figure 4 As shown, in this embodiment, the bidirectional threaded rod 10 is threaded with a locking nut 13 on the side near the bracket 9;

[0038] The above technical solution can prevent the cable 12 from being accidentally loosened due to misoperation. When the bidirectional threaded rod 10 is rotated to the required position, the locking nut 13 is tightened so that one end of it applies pressure to the bracket 9, thereby preventing the bidirectional threaded rod 10 from rotating relative to the bracket 9 through frictional resistance.

[0039] like Figure 3 and Figure 5 As shown, in this embodiment, the sample holder 5 is further provided with at least one set of prepositioning components for prepositioning the cable 12 on the bearing surface; specifically, the prepositioning components include: a positioning sleeve 14 with a positioning groove 15, one end of which is fixedly mounted on the sample holder 5; a movable clamp 16 movably disposed in the positioning groove 15; and a spring 17 disposed in the positioning groove 15 and fixedly connected at one end to the movable clamp 16, the spring 17 being used to push the movable clamp 16 to clamp the cable 12 in cooperation with the inner wall of the positioning groove 15; preferably, the surface of the movable clamp 16 is provided with an angle.

[0040] The above technical solution can achieve the pre-positioning of the cable 12. When the sample holder 5 is placed horizontally, the cable 12 is passed through the positioning groove 15 of the positioning sleeve 14. The cable 12 abuts against the oblique angle of the movable clamp 16, thereby compressing the spring 17. The spring 17 is in a compressed state, thereby pushing the movable clamp 16 to perform preliminary positioning of the cable 12. The elastic force of the spring 17 should be sufficient to not affect the sliding adjustment of the cable 12 along the positioning groove 15, while also preventing the cable 12 from shaking in the positioning groove 15.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, a hook rod 6 is provided at the upper end of the sample holder 5. The hook rod 6 is used to cooperate with the hook 4 in the test chamber 1 to lift the sample holder 5.

[0042] The above technical solution allows the sample holder 5 to be vertically suspended in the test chamber 1.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the sample holder 5 is provided with several support rods 18 at one end near the inner wall of the test chamber 1;

[0044] The above technical solution enables the support rod 18 to contact the inner wall of the test chamber 1 when the sample holder 5 is suspended, thereby maintaining the stability of the sample holder 5. At the same time, when the sample holder 5 is placed horizontally, the support rod 18 can also act as a support leg to isolate the sample holder 5 from the ground, making it convenient to fix the cable 12.

[0045] like Figure 1 and Figure 3 As shown, in this embodiment, both the clamping mechanism and the pre-positioning component are provided in two sets to limit the two ends of the cable 12 respectively.

[0046] The above technical solution can improve the positioning stability of cable 12 and prevent cable 12 from loosening during the experiment.

[0047] Working principle: When in use, first place the support rod 18 of the sample holder 5 in contact with the ground so that the sample holder 5 is placed horizontally on the ground. Pass the cable 12 through the positioning groove 15 of the positioning sleeve 14. The cable 12 abuts against the angle of the movable clamp 16, thereby compressing the spring 17. The spring 17 is in a compressed state, thereby pushing the movable clamp 16 to initially position the cable 12.

[0048] The position of the cable 12 is adjusted to a limited extent so that it slides along the bearing surface of the sample holder 5 through the clamping groove of the clamping block 8. After all the cables 12 are operated in accordance with the above steps, the handle at one end of the bidirectional threaded rod 10 is rotated to drive the bidirectional threaded rod 10 to rotate. The bidirectional threaded rod 10 cooperates with the threaded groove 11 on the surface of the movable plate 7 to drive the two movable plates 7 to move synchronously. When the two movable plates 7 move towards each other, the clamping blocks 8 on the movable plates 7 will come together to tighten the cable 12 and achieve clamping of the cable 12.

[0049] The sample holder 5 carrying the cable 12 is then placed into the test chamber 1. The sample holder 5 is connected to the hook 4 on the inner wall of the test chamber 1 via the hook rod 6 at the upper end of the sample holder 5. The sample holder 5 is vertically suspended and fixed in the test chamber 1. When the sample holder 5 is suspended, the support rod 18 can touch the inner wall of the test chamber 1, thereby maintaining the stability of the sample holder 5. Then the test chamber 1 can be closed and the combustion assembly 2 can be started to conduct a combustion test on the cable 12.

[0050] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0051] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A kind of bundled cable combustion test device, comprising: Sample holder (5), the sample holder (5) has the load-bearing surface for supporting cable (12); Characterized in that, the device further comprises at least one set of clamping mechanism for clamping cable (12) on sample holder (5), the clamping mechanism includes: Two movable plates (7) are oppositely arranged on the sample holder (5); Several clamping blocks (8) are arranged on the surface of the movable plate (7) along the length direction, the clamping block (8) is provided with clamping groove matched with the cross-sectional contour of cable (12), and the clamping block (8) on one of the movable plates (7) can cooperate with the clamping block (8) on the other movable plate (7) to form clamping on cable (12); Driving structure is used to drive two movable plates (7) to move towards each other or move away from each other, so that all cables (12) on the load-bearing surface are clamped or released by the clamping block (8) driven by two movable plates (7).

2. The bundled cable burn test apparatus of claim 1, wherein, The driving structure includes: Support (9) fixedly connected with the sample holder (5); Two-way threaded rod (10) rotationally connected with the support (9), both ends of the two-way threaded rod (10) are threadedly matched with threaded groove (11) provided on the surface of movable plate (7), and by rotating the two-way threaded rod (10), two movable plates (7) can be moved towards each other or moved away from each other.

3. The bundled cable burn test apparatus of claim 2, wherein, The two-way threaded rod (10) is threadedly connected with lock nut (13) on the side close to support (9).

4. A bundled cable burn test apparatus according to any one of claims 1-3, wherein, At least one set of pre-positioning assembly for pre-positioning cable (12) on the load-bearing surface is further provided on the sample holder (5).

5. The bundled cable burn test apparatus of claim 4, wherein, The pre-positioning assembly includes: Positioning sleeve (14) provided with positioning groove (15), one end of the positioning sleeve (14) is fixedly provided on the sample holder (5); Movable clamp (16) movably arranged in the positioning groove (15); Spring (17) arranged in the positioning groove (15) and fixedly connected with movable clamp (16) at one end, the spring (17) is used to push movable clamp (16) to clamp cable (12) with the inner wall of positioning groove (15).

6. The bundled cable burn test apparatus of claim 5, wherein, The upper end of the sample holder (5) is provided with hook rod (6), and the hook rod (6) is used to cooperate with the lifting hook (4) in the test box (1) to lift the sample holder (5).

7. A bundled cable burn test apparatus as defined in claim 6, wherein, The sample holder (5) is provided with several support rods (18) at the end close to the inner wall of the test box (1), so that the support rods (18) can abut against the inner wall of the test box (1) when the sample holder (5) is lifted, thereby maintaining the stability of the sample holder (5).

8. The bundled cable burn test apparatus of claim 5, wherein, The clamping mechanism and the pre-positioning assembly are both provided with two sets to position the two ends of the cable (12) respectively.

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