Flame-retardant cable vertical combustion test device

Abstract

The utility model belongs to the technical field of coal mine flame-retardant cable tests, and particularly relates to a flame-retardant cable vertical combustion test device. Comprising a test box body which is internally divided into an upper layer and a lower layer, the upper layer is a combustion chamber, and the lower layer is an equipment chamber; a first clamp, a second clamp and a blow lamp are arranged in the combustion chamber, and the first clamp and the second clamp are used for clamping and fixing a tested cable; the blowtorch is arranged on the side of the first clamp and the second clamp, is mounted on an angle-adjustable bracket, and is connected with a fuel supply mechanism outside the test box body through a hose; a tension loading device is arranged in the equipment chamber, the traction end of the tension loading device is connected with a third clamp, the third clamp is used for clamping and connecting the tested cable, and the third clamp can apply vertical tension to the tested cable under the driving of the tension loading device; according to the flame-retardant cable vertical combustion test device, the angle of the blowtorch can be adjusted, the angle of the blowtorch can be rapidly and stably changed according to different sample requirements, and the test accuracy is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine flame-retardant cable testing, and particularly relates to a vertical combustion test device for flame-retardant cables. Background Art

[0002] During the use, replacement and detection of flame-retardant cables, it is necessary to test the non-combustion performance of flame-retardant cables under direct combustion of a specified fire source to judge the flame-retardant performance of the cable surface material. The diameter range of the flame-retardant cables used in coal mines is from a few millimeters to several hundred millimeters. Such a large measurement range results in the need to frequently replace the fixtures during the flame-retardant cable test, and at the same time, the angle of the blowtorch also needs to be frequently adjusted. The existing test devices cannot perform the stretching operation at the bottom of the specimen. Summary of the Utility Model

[0003] The utility model aims to solve the problem that the test device cannot test flame-retardant cables with various diameter specifications.

[0004] The utility model provides the following technical solution: a vertical combustion test device for flame-retardant cables, including a test box body, which is divided into upper and lower layers inside. The upper layer is a combustion chamber, and the lower layer is an equipment chamber;

[0005] A first fixture, a second fixture and a blowtorch are arranged in the combustion chamber. The first fixture and the second fixture are arranged vertically, and the first fixture and the second fixture are used for clamping and fixing the cable to be tested; the blowtorch is on the side of the first fixture and the second fixture, and the blowtorch is installed on a bracket capable of adjusting the angle. The blowtorch is connected to a fuel supply mechanism outside the test box body through a hose;

[0006] A tension loading device is arranged in the equipment chamber. The pulling end of the tension loading device is connected with a third fixture, and the third fixture is used for clamping and connecting the cable to be tested. The third fixture can apply a vertical tension to the cable to be tested under the drive of the tension loading device.

[0007] Further, the bracket includes a fixed vertical plate and a rotating arm. The fixed vertical plate is fixed in the combustion chamber. The lower end of the rotating arm is connected to the fixed vertical plate through a rotating joint. A plurality of jacks are opened on the fixed vertical plate, and the plurality of jacks are distributed on an arc centered on the rotation axis of the rotating joint. A plug pin is slidably connected to the rotating arm. After the rotating arm rotates to the target angle, the plug pin is inserted into the corresponding jack, and the angle of the rotating arm is fixed.

[0008] Further, the tension loading device is horizontally installed in the equipment chamber of the test box body. A redirecting wheel is arranged in the equipment chamber. The zipper on the tension loading device extends into the combustion chamber after bypassing the redirecting wheel, and the third fixture is installed at the end of the zipper.

[0009] Further, a tension sensor is connected to the section of the zipper in the equipment chamber after bypassing the redirecting wheel.

[0010] Further, the jacks on the fixed vertical plate are distributed at the positions of 0°, 30°, 45°, 60°, and 90°.

[0011] Further, a tension spring is connected between the bolt and the rotating arm.

[0012] Further, the first fixture and the second fixture are metal clamps. The hoop shell of the metal clamp is welded to the cushion block on the test box body, and a hand-tightening cap is welded to the end of the worm of the metal clamp.

[0013] Further, the test box body includes a box, a combustion chamber box door, and an equipment room box door. One side of the combustion chamber box door and the equipment room box door is connected to the box by hinges, and the other side is connected to the box by buckles. The equipment room box door is a transparent door panel, and the combustion chamber box door is a metal door panel. An observation window is opened on the combustion chamber box door, and a refractory glass is installed in the observation window; a notch allowing the free movement of the zipper is opened on the partition between the combustion chamber and the equipment room.

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] 1. The angle of the blowtorch of the vertical combustion test device for flame-retardant cables can be adjusted, and it can quickly and stably change the angle of the blowtorch according to different requirements of the test specimens, improving the test accuracy.

[0016] 2. The fixture of the vertical combustion test device for flame-retardant cables has a large movement range, and it can change the length of the clamping steel belt of the fixture according to different cable diameters, playing a stable fixing role.

[0017] 3. The tensile loading device of the vertical combustion test device for flame-retardant cables adopts an electric drive mode, and at the same time, a tensile sensor is added to ensure the accuracy of the test force, applying a load to prevent specimens with too small diameters from being blown by the blowtorch during the detection process, affecting the test results.

[0018] 4. The vertical combustion test device for flame-retardant cables has been applied in the detection process of coal mine flame-retardant cables. At the same time, injection-molded products or flame-retardant parts in electrical appliances, telecommunications, lighting, lighting equipment, and televisions can also use this device for testing, with great potential for promotion. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic connection diagram of the rotating arm and the bolt;

[0021] Figure 3 is a schematic diagram of the combustion chamber box door and the equipment room box door;

[0022] Figure 4Schematic diagram of the fasteners on the combustion chamber door and the equipment chamber door.

[0023] In the figure: 1 - test box body; 1.1 - combustion chamber; 1.2 - equipment chamber; 1.3 - combustion chamber door; 1.4 - equipment chamber door; 2 - first fixture; 3 - second fixture; 4 - blowtorch; 5 - fixed vertical plate; 5.1 - jack; 6 - tensile loading device; 7 - third fixture; 8 - rotating arm; 9 - pin; 10 - redirecting wheel; 11 - zipper; 12 - tensile sensor; 13 - tension spring; 14 - cushion block; 15 - hand-tightening nut; 16 - hinge; 17 - fastener. Specific implementation mode

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] As Figure 1 shown: A vertical combustion test device for flame-retardant cables includes a test box body 1, which is divided into upper and lower layers inside. The upper layer is a combustion chamber 1.1, and the lower layer is an equipment chamber 1.2.

[0026] Inside the combustion chamber 1.1, there are a first fixture 2, a second fixture 3 and a blowtorch 4. The first fixture 2 and the second fixture 3 are arranged vertically. The first fixture 2 and the second fixture 3 are used to clamp and fix the cable to be tested; the blowtorch 4 is on the side of the first fixture 2 and the second fixture 3. The blowtorch 4 is installed on a bracket that can adjust the angle, and the blowtorch 4 is connected to a fuel supply mechanism outside the test box body 1 through a hose; the cable to be tested is burned by the blowtorch 4 to test the flame-retardant performance of the cable to be tested.

[0027] Inside the equipment chamber 1.2, there is a tensile loading device 6. The pulling end of the tensile loading device 6 is connected to a third fixture 7. The third fixture 7 is used to clamp and connect the cable to be tested. The third fixture 7 can apply a vertical tensile force to the cable to be tested under the drive of the tensile loading device 6.

[0028] The diameter range of the flame-retardant cables used in coal mines is from a few millimeters to several hundred millimeters. According to the different diameters of the flame-retardant cables, two clamping methods for the tested cables are designed in the combustion chamber 1.1. For the thick flame-retardant cables that can maintain a straight state by themselves, they are clamped and fixed by the first clamp 2 and the second clamp 3. For the thin flame-retardant cables that are in a bent state without external force, the upper end of the tested cable is clamped and fixed by the first clamp 2, and the lower end freely passes through the second clamp 3 and then connects to the third clamp 7. The tensile force loading device 6 applies a downward tensile force to the third clamp 7, and the magnitude of the tensile force matches the diameter of the tested cable to keep the tested cable in a straight state. During the test process, the tensile force of the tensile force loading device 6 remains unchanged.

[0029] As Figure 2 shown: The bracket includes a fixed vertical plate 5 and a rotating arm 8. The fixed vertical plate 5 is fixed in the combustion chamber 1.1. The lower end of the rotating arm 8 is connected to the fixed vertical plate 5 through a rotating joint. The rotating arm 8 swings with the rotating joint as the pivot point. A number of jacks 5.1 are opened on the fixed vertical plate 5, and the number of jacks 5.1 are distributed on an arc centered on the rotation axis of the rotating joint. The jacks 5.1 on the fixed vertical plate 5 are distributed at the positions of 0°, 30°, 45°, 60°, and 90°; A pin 9 is slidably connected to the rotating arm 8. After the rotating arm 8 rotates to the target angle, the pin 9 is inserted into the corresponding jack 5.1, and the angle of the rotating arm 8 is fixed.

[0030] A tension spring 13 is connected between the pin 9 and the rotating arm 8. When there is no human intervention, the pin 9 remains in the state of being inserted into the jack 5.1 of the fixed vertical plate 5 to prevent the angle of the rotating arm 8 from changing; when adjusting the angle of the rotating arm 8, the pin 9 is pulled out of the jack 5.1.

[0031] As Figure 1 shown: The tensile force loading device 6 is horizontally installed in the equipment room 1.2 of the test box 1. A redirecting wheel 10 is arranged in the equipment room 1.2. The zipper 11 on the tensile force loading device 6 bypasses the redirecting wheel 10 and then extends into the combustion chamber 1.1. The third clamp 7 is installed at the end of the zipper 11. The tensile force loading device 6 deviates from directly below the combustion area in the combustion chamber 1.1 to prevent the slag generated by combustion from falling onto the tensile force loading device 6.

[0032] A tensile force sensor 12 is connected to the section of the zipper 11 in the equipment room 1.2 after bypassing the redirecting wheel 10, and the torque of the tensile force loading device 6 is monitored through the tensile force sensor 12. The tensile force loading device 6 uses an electric pull rod to facilitate precise control of the torque.

[0033] The first fixture 2 and the second fixture 3 are metal clamps. The shell of the metal clamp is welded to the cushion block 14 on the test box body 1, and a hand-tightening cap 15 is welded to the end of the worm of the metal clamp. The clamping steel belts of the first fixture 2 and the second fixture 3 can be tightened or loosened by directly hand-tightening operation. The third fixture 7 is also a metal clamp, and the shell of the metal clamp is connected to the zipper 11.

[0034] As Figure 3 , Figure 4 shown: The test box body 1 includes a box, a combustion chamber box door 1.3 and an equipment room box door 1.4. One side of the combustion chamber box door 1.3 and the equipment room box door 1.4 is connected to the box through a hinge 16, and the other side is connected to the box through a buckle 17. The equipment room box door 1.4 is a transparent door panel, and the combustion chamber box door 1.3 is a metal door panel. An observation window is opened on the combustion chamber box door 1.3, and a refractory glass is installed in the observation window to observe the burning state of the cable under test through the observation window. A notch allowing the free movement of the zipper 11 is opened on the partition between the combustion chamber 1.1 and the equipment room 1.2.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flame retardant cable vertical combustion test device, characterized in that: The test box (1) comprises a test box body (1), wherein the interior of the test box body (1) is divided into two layers, the upper layer is a combustion chamber (1.1), and the lower layer is an equipment room (1.2); A first clamp (2), a second clamp (3) and a blowtorch (4) are arranged in the combustion chamber (1.1); the first clamp (2) and the second clamp (3) are arranged in a vertical direction; the first clamp (2) and the second clamp (3) are used to clamp and fix the tested cable; the blowtorch (4) is located on the side of the first clamp (2) and the second clamp (3); the blowtorch (4) is mounted on a bracket capable of adjusting an angle; the blowtorch (4) is connected to a fuel supply mechanism outside the test chamber (1) through a hose; A tension loading device (6) is provided in the equipment room (1.2); a pulling end of the tension loading device (6) is connected to a third clamp (7); the third clamp (7) is used to clamp and connect the cable under test; and the third clamp (7) can apply a vertical tension to the cable under test under the drive of the tension loading device (6).

2. A flame retardant cable vertical combustion test device according to claim 1, characterized in that: The bracket comprises a fixed vertical plate (5) and a rotating arm (8), the fixed vertical plate (5) being fixed in the combustion chamber (1.1), the lower end of the rotating arm (8) being connected to the fixed vertical plate (5) via a rotating joint, a plurality of plug holes (5.1) being provided on the fixed vertical plate (5), the plurality of plug holes (5.1) being distributed on an arc line with a rotating axis of the rotating joint as the center, a latch (9) being slidably connected to the rotating arm (8), the latch (9) being inserted into the corresponding plug hole (5.1) after the rotating arm (8) is rotated to a target angle, and the angle of the rotating arm (8) is fixed.

3. A flame retardant cable vertical combustion test device according to claim 1 or 2, characterized in that: The tension loading device (6) is installed horizontally in the equipment room (1.2) of the test box (1), and a redirecting wheel (10) is provided in the equipment room (1.2). The zipper (11) on the tension loading device (6) bypasses the redirecting wheel (10) and extends into the combustion chamber (1.1), and the third clamp (7) is installed at the end of the zipper (11).

4. A flame retardant cable vertical combustion test device according to claim 3, characterized in that: A tension sensor (12) is connected to the section of the zipper (11) located in the equipment room (1.2) after the zipper (11) passes around the redirecting wheel (10).

5. A flame retardant cable vertical combustion test device according to claim 2, characterized in that: The sockets (5.1) on the fixed vertical plate (5) are distributed at positions of 0°, 30°, 45°, 60°, and 90°.

6. A flame retardant cable vertical combustion test device according to claim 2, characterized in that: A tension spring (13) is connected between the latch pin (9) and the rotating arm (8).

7. A flame retardant cable vertical combustion test device according to claim 1, characterized in that: The first clamp (2) and the second clamp (3) are metal clamps, the clamp shells of the metal clamps are welded to the cushion blocks (14) on the test box (1), and the ends of the worms of the metal clamps are welded with hand-tightened caps (15).

8. A flame retardant cable vertical combustion test device according to claim 3, characterized in that: The test box (1) comprises a box, a combustion chamber door (1.3) and an equipment room door (1.4); one side of the combustion chamber door (1.3) and the equipment room door (1.4) are connected to the box via a hinge (16) and the other side is connected to the box via a buckle (17); the equipment room door (1.4) is a transparent door panel, and the combustion chamber door (1.3) is a metal door panel; an observation window is provided on the combustion chamber door (1.3), and fire-resistant glass is installed in the observation window; a notch is provided on the partition between the combustion chamber (1.1) and the equipment room (1.2) to allow the zipper (11) to move freely.

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