A polyethylene cable flame retardant test apparatus

Abstract

The utility model relates to cable detection equipment technical field discloses a kind of polyethylene cable flame-retardant test equipment, including vertical combustion testing machine body, further including detachably installed in the vertical combustion testing machine body bottom wall slide bar, slide bar is slidably connected with the material receiving plate for collecting drippings, material receiving plate is mainly composed of inclined section and horizontal section, and inclined section is provided with the plug-in slot for adapting cable;The utility model is by being provided with the material receiving plate of being composed of inclined section and horizontal section, and cooperate with the sticking plate that idle plug-in slot can be closed, so that material receiving plate and sticking plate are located just below cable combustion area, inclined section can guide drippings to slide smoothly to horizontal section and be collected, effectively solve the problem that paper in prior art is fixed poorly and easily displaced, and high-temperature resistance is insufficient and easily broken, leading to drippings to leak to testing machine bottom wall, ensure that drippings are received completely, guarantee test data accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of cable testing equipment, specifically a flame retardant testing device for polyethylene cables. Background Technology

[0002] Polyethylene cables, with their excellent insulation properties, good flexibility, and economy, are widely used in key areas such as power transmission, building wiring, rail transportation, and communication engineering. Their flame-retardant properties are a core indicator for ensuring electrical safety and fire prevention. In a fire environment, substandard flame-retardant performance can cause the cable to melt and drip. These high-temperature drips can not only ignite surrounding flammable materials and exacerbate the spread of fire, but also damage adjacent electrical equipment, disrupt circuit integrity, and even cause serious safety accidents such as electric shock and secondary fires.

[0003] Currently, the mainstream equipment used for flame retardant testing of polyethylene cables is the vertical burning test machine. Its core function is to fix the cable sample with a special clamp, precisely control the flame height and burning time, and simulate a real combustion scenario to evaluate the flame retardant effect of the cable. Regarding the high-temperature molten drips generated during cable combustion in the test, the most common method in existing technology is to lay ordinary paper on the bottom wall of the vertical burning test machine body, directly below the clamp. The paper prevents the drips from directly contacting the bottom wall of the test machine and the clamp, reducing the impact of the drips on the equipment.

[0004] In conventional use, certain problems exist. Due to the poor stability of the paper, it is easily displaced, wrinkled, or even curled after being ignited by the flame airflow and impacted by high-temperature drips during the test. This results in some drips not being effectively caught and falling onto the clamping surface or the bottom wall of the testing machine. Furthermore, the paper's high-temperature resistance and structural strength are insufficient. The molten drips produced by the burning of polyethylene cables are at a high temperature. When these high-temperature drips come into contact with the paper, they can easily cause carbonization, burn-through, or damage to the paper. This allows the drips to directly penetrate the paper and contact the bottom wall of the testing machine, forming molten residues that are difficult to clean. Moreover, the long-term accumulation of high-temperature drips is not only difficult to clean but can also cause thermal damage or corrosion to the metal material of the bottom wall of the testing machine, shortening the service life of the equipment. Therefore, we urgently need a flame-retardant testing device for polyethylene cables to solve the above problems. Utility Model Content

[0005] This utility model provides a flame retardant testing device for polyethylene cables. By setting a receiving plate with a plug slot for the cable and sealing it with a bonding plate, it can collect drippings and solve the problems of easy damage to paper and difficulty in cleaning residue on the bottom wall of the testing machine in the prior art.

[0006] This utility model provides the following technical solution: A flame-retardant testing device for polyethylene cables includes a vertical combustion test machine body and a slide rod detachably installed on the bottom wall of the vertical combustion test machine body. A receiving plate for collecting dripping material is slidably connected to the slide rod. The receiving plate is mainly composed of an inclined section and a horizontal section, and the inclined section is provided with a plug groove for accommodating cables.

[0007] As a preferred embodiment of this utility model, the number of the insertion slots is at least four sets, and the inner diameter of the multiple sets of insertion slots decreases sequentially along the inclined path of the inclined section and toward the horizontal section.

[0008] As a preferred technical solution of this utility model, a limiting hole is provided in the inner wall of the insertion groove, and a fitting plate adapted to the insertion groove is provided in the insertion groove. When the connection of the fitting plate is inserted into the limiting hole, the fitting plate abuts against the inner wall of the insertion groove to form a closed area.

[0009] As a preferred technical solution of this utility model, a placement plate for supporting the receiving plate is fixedly connected to the slide rod, and a placement area is formed when the bottom of the horizontal section abuts against the placement plate.

[0010] As a preferred technical solution of this utility model, the included angle between the inclined segment and the horizontal segment is in the range of 45°-60°.

[0011] As a preferred embodiment of this utility model, a handle for hand-held use is fixedly installed on the side wall of the horizontal section.

[0012] Compared with the prior art, this utility model provides a flame retardant testing device for polyethylene cables, which has the following beneficial effects: 1. In this polyethylene cable flame retardant testing equipment, by setting up a receiving plate composed of an inclined section and a horizontal section, and cooperating with a bonding plate that can close unused insertion slots, the receiving plate and the bonding plate are located directly below the cable combustion area. The inclined section can guide the dripping material to slide smoothly to the horizontal section for centralized collection, which effectively solves the problems of poor paper fixation and easy displacement, insufficient high temperature resistance and easy damage in the existing technology, which cause the dripping material to fall onto the bottom wall of the testing machine, ensuring that the dripping material is completely collected and ensuring the accuracy of the test data.

[0013] 2. In this polyethylene cable flame retardant testing equipment, the receiving plate and bonding plate are made of high-temperature resistant materials, which can withstand repeated impacts from high-temperature drips without damage, replacing the disposable paper used in the prior art and reducing the cost of test consumables. At the same time, the detachable design of the slide bar facilitates cleaning of the bottom wall of the testing machine, avoiding direct contact between drips and the bottom wall to form residues that are difficult to clean, preventing corrosion and heat damage to the metal material of the bottom wall, solving the problem of shortened equipment life due to paper damage in the prior art, and extending the service life of the equipment.

[0014] 3. In this polyethylene cable flame retardant testing equipment, by setting a handle with a high-temperature resistant rubber sleeve on the side wall of the horizontal section of the receiving plate, the operator can safely hold the handle to slide or pick up and put down the receiving plate, avoiding direct contact with the high-temperature receiving plate and causing burns, effectively improving the safety and convenience of operation.

[0015] The parts of this device not covered are the same as or can be implemented using existing technologies. This utility model solves the problems in the existing technology of poor paper fixation and easy displacement, insufficient high temperature resistance and easy damage, which cause the dripping material to fall onto the bottom wall of the testing machine. It ensures that the dripping material is completely collected, guarantees the accuracy of test data, and avoids the situation where the dripping material falls directly onto the bottom wall and is difficult to clean. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial cross-sectional view of the present invention. Figure 3 This is a first-state diagram of the receiving plate of this utility model; Figure 4 This is a second state diagram of the receiving plate of this utility model; Figure 5 This is a schematic diagram of the bonding plate structure of this utility model.

[0018] In the diagram: 1. Vertical combustion test machine body; 2. Slide bar; 3. Receiving plate; 4. Insertion groove; 5. Limiting hole; 6. Adhesive plate; 7. Placement plate; 8. Handle. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Reference Figures 1-5A flame-retardant testing device for polyethylene cables includes a vertical combustion testing machine body 1. The vertical combustion testing machine body 1 includes a frame, on which a sample clamping mechanism, a flame-spraying mechanism, a flame height measuring component, and a timing component are integrated. The sample clamping mechanism is an adjustable-height clamp 9 used to fix polyethylene cable samples. The flame-spraying mechanism includes a flame head, a gas conduit, a gas canister, and a flow regulating valve. The flame head is located directly below the clamp and is connected to the gas canister via the gas conduit. The flow regulating valve controls the flame size. The flame height measuring component is a scale vertically fixed to the frame for reading the flame height. The timing component is a timer installed on the control panel, electrically connected to the flame-spraying mechanism, and records the combustion and afterflame time. It should be noted that some structural diagrams are not shown; this is a direct reference to conventional technical solutions and will not be elaborated upon further here.

[0021] It also includes a slide bar 2 that can be detachably installed on the bottom wall of the vertical combustion test machine body 1. A placement plate 7 for supporting the receiving plate 3 is fixedly connected to the slide bar 2. When the bottom of the horizontal section abuts against the placement plate 7, a placement area is formed.

[0022] Here, the end of the slide bar 2 can be installed on the body 1 of the vertical combustion test machine by means of plugging, bolts or other locking methods. The placement plate 7 is fixed on the slide bar 2 and abuts against the bottom of the horizontal section of the receiving plate 3 to form a stable placement area, which can counteract the force of airflow disturbance and drip impact, ensuring that the receiving plate 3 is kept in the preset position throughout the process, and avoiding drip leakage caused by the displacement of the receiving plate 3.

[0023] It should be noted that the position of the placement plate 7 corresponds directly below the combustion zone. When the operator installs the receiving plate 3, he only needs to align the bottom of the horizontal section with the placement plate 7 to quickly determine the precise position of the receiving plate 3 without repeated measurement and adjustment, thus improving the efficiency of test preparation.

[0024] Furthermore, the vertical combustion test machine body 1 has multiple sets of plug-in holes for adapting to the installation of the slide bar 2. The multiple sets of plug-in holes are used to adjust the position of the slide bar 2. The adjustment of the slide bar 2 can make the plug-in groove 4 on the receiving plate 3 adapt to the cable position.

[0025] A receiving plate 3 for collecting dripping materials is slidably connected to the slide rod 2. The receiving plate 3 is mainly composed of an inclined section and a horizontal section, and the inclined section is provided with a plug groove 4 for adapting the cable. The included angle between the inclined section and the horizontal section is 45°-60°.

[0026] Here, the angle between the inclined section and the horizontal section is preferably 60°. At this angle, the molten drips generated by the burning cable fall along the cable to the inclined section and then slide smoothly down the slope to the horizontal section due to gravity, avoiding the accumulation and solidification of the drips in the inclined section, which would be difficult to clean. The horizontal section, on the other hand, allows for the centralized collection of the drips, eliminating the need to go deep into the equipment for subsequent cleaning, making the operation more convenient.

[0027] It should be noted that the receiving plate 3 is made of high-temperature resistant metal material, such as stainless steel. Compared with paper, which is easily carbonized and burned through, the receiving plate 3 can withstand the impact of high-temperature drips without being damaged. At the same time, the receiving plate 3 and the bonding plate 6 are located directly below the combustion zone, ensuring that all drips can fall into the receiving structure, thus completely solving the problem of drip leakage caused by paper displacement or damage.

[0028] Furthermore, the receiving plate 3 completely covers the area on the bottom wall of the vertical combustion test machine body 1 where dripping material may come into contact, which can prevent dripping material from directly contacting the bottom wall. This avoids the formation of difficult-to-clean molten residue on the bottom wall after the traditional paper is damaged. At the same time, it prevents long-term corrosion and heat damage to the metal material of the bottom wall by high-temperature dripping material, thus extending the service life of the equipment.

[0029] The number of insertion slots 4 is at least four sets, and the inner diameter of multiple sets of insertion slots 4 decreases sequentially along the inclined path of the inclined section and toward the horizontal section.

[0030] Here, there are at least four sets of insertion slots 4, and the inner diameter decreases sequentially along the inclined path of the inclined section, for example from 10mm to 2mm, which can cover various polyethylene cable diameter specifications on the market. When testing thick cables, insert the large inner diameter slot, and when testing thin cables, insert the small inner diameter slot. There is no need to replace the splice plate 3 separately for different specifications of cables. Compared with the situation where traditional paper cannot be adapted to different cables and the paper position needs to be adjusted frequently, the test preparation time is greatly shortened and the test efficiency is improved. It should be noted that the insertion slot 4 with the largest diameter is located in the inclined section and is far away from the horizontal section. Starting from this, the inner diameter of the insertion slot 4 decreases sequentially towards the horizontal section.

[0031] A limiting hole 5 is provided on the inner wall of the insertion groove 4. A fitting plate 6 adapted to the insertion groove 4 is provided inside the insertion groove 4. When the connection of the fitting plate 6 is inserted into the limiting hole 5, the fitting plate 6 abuts against the inner wall of the insertion groove 4 to form a closed area.

[0032] Here, the limiting hole 5 is opened on the inner wall of the insertion groove 4. The connection of the bonding plate 6 can be precisely inserted into the limiting hole 5 to ensure that the bonding plate 6 can completely abut against the inner wall of the insertion groove 4 after installation, without any gap.

[0033] Furthermore, when using a certain set of insertion slots 4, if other unused insertion slots 4 are not sealed, dripping material may leak from the openings of the unused insertion slots 4 to the bottom wall; the bonding plate 6 is adapted to the insertion slots 4, and after being inserted into the limiting hole 5, it forms a closed area, which can completely block the openings of the unused insertion slots 4, ensuring that all dripping material is collected by the inclined and horizontal sections of the receiving plate 3, without the risk of leakage. The bonding plate 6 is made of the same high-temperature resistant material as the receiving plate 3, and can be repeatedly disassembled and installed. It can be flexibly matched according to the usage of the insertion slots 4 in different tests, without the need for additional consumables, thereby reducing the test cost.

[0034] A handle 8 for hand-held use is fixedly installed on the side wall of the horizontal section.

[0035] Here, the outer surface of the handle 8 is covered with a high-temperature resistant rubber sleeve, which can effectively insulate heat. When the operator holds the handle 8 to slide or pick up and put down the receiving plate 3, he / she will not be burned by the high temperature. When sliding the receiving plate 3, the direction of movement can be precisely controlled by the handle 8. When picking up and putting down the receiving plate 3, the handle 8 can be used to hold it stably, preventing the receiving plate 3 from slipping and causing dripping materials to spill out, thus improving the safety and convenience of operation.

[0036] In this invention, the sliding rod 2 is installed in the corresponding insertion hole on the bottom wall of the frame of the vertical combustion test machine body 1 by plugging in. The sliding sleeve at the bottom of the receiving plate 3 is fitted onto the sliding rod 2. The receiving plate 3 is slid up to above the placement plate 7 so that the bottom of the horizontal section abuts against the placement plate 7. At this time, the receiving plate 3 is located directly below the cable combustion zone. According to the diameter of the cable sample to be tested, a suitable insertion slot 4 is selected. The bonding plate 6 of the unused insertion slot 4 is inserted into the limiting hole 5 through the protrusion to form a closure of the unused insertion slot 4. The upper end of the polyethylene cable sample is then connected to the insertion slot. The cable is fixed by the fixing mechanism on the frame, and the lower end is inserted into the selected plug slot 4. The height of the fixing mechanism is adjusted to ensure that the cable burning area corresponds to the receiving plate 3. The vertical combustion test machine is turned on, and the combustion process is controlled to start the flame retardant test. During the test, the molten drips produced by the cable combustion fall along the cable and into the inclined section of the receiving plate 3. Then it slides to the horizontal section for collection. No drips fall to the bottom wall. After the test, the equipment is turned off and the receiving plate 3 is cooled. Hold the handle 8 and slide the receiving plate 3 along the slide bar 2 to the outside of the frame to clean up the drips in the horizontal section.

[0037] Components not described in detail in this article are existing technologies.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A flame retardant testing device for polyethylene cables, comprising a vertical combustion testing machine body (1), characterized in that, It also includes a slide bar (2) that can be detachably installed on the bottom wall of the vertical combustion test machine body (1). A receiving plate (3) for collecting drips is slidably connected on the slide bar (2). The receiving plate (3) is mainly composed of an inclined section and a horizontal section, and a plug groove (4) for adapting cables is provided on the inclined section.

2. The flame retardant testing equipment for polyethylene cables according to claim 1, characterized in that, The number of the plug slots (4) is at least four sets, and the inner diameter of the multiple sets of plug slots (4) decreases sequentially along the inclined path of the inclined section and toward the horizontal section.

3. The flame retardant testing equipment for polyethylene cables according to claim 2, characterized in that, The inner wall of the insertion groove (4) is provided with a limiting hole (5), and a fitting plate (6) adapted to the insertion groove (4) is provided in the insertion groove (4). When the connection of the fitting plate (6) is inserted into the limiting hole (5), the fitting plate (6) and the inner wall of the insertion groove (4) abut against each other to form a closed area.

4. The flame retardant testing equipment for polyethylene cables according to claim 1, characterized in that, The slide bar (2) is fixedly connected to a placement plate (7) for supporting the receiving plate (3), and a placement area is formed when the bottom of the horizontal section abuts against the placement plate (7).

5. The flame retardant testing equipment for polyethylene cables according to claim 1, characterized in that, The angle between the inclined segment and the horizontal segment ranges from 45° to 60°.

6. The flame retardant testing equipment for polyethylene cables according to claim 1, characterized in that, A handle (8) for hand grip is fixedly installed on the side wall of the horizontal section.

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