Cable insulation layer pyrolysis product sampling device

Abstract

A cable insulation layer pyrolysis product sampling device relates to the technical field of cable insulation layer pyrolysis analysis and comprises a box body, a cover body and a clamping device, the top of the box body is open, and a cover body correspondingly matched with the top of the box body is arranged at the position corresponding to the opening. Clamping devices for clamping cables are arranged on the left side and the right side in the box body; electric heating devices are arranged on the front side and the rear side in the box body; the bottom of the box body is connected with a drawer used for collecting cable insulation layer pyrolysis products in a drawing mode. One side of the top of the box body is provided with a vent hole, and the other side is communicated with an air pump; due to the design of the cover body, the box body can be effectively sealed, so that the formation of an internal high-temperature environment is accelerated, flue gas generated in a pyrolysis process can be intensively collected and treated, the influence on an experimental environment is reduced, and the safety and efficiency of an experiment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of cable insulation layer pyrolysis analysis, in particular to a cable insulation layer pyrolysis product sampling device. Background Art

[0002] Among the various causes of electrical fires, wire and cable failures are the most common source of fire. For the prevention of electrical fires, early warning of the potential burning risk of cables in trenches is crucial. Currently, there are still deficiencies in cable fire early warning. Traditional monitoring methods mainly rely on smoke detectors, which can only trigger alarms when smoke is generated in the early stages of a fire and cannot provide early warning information before a fire.

[0003] Studies have shown that the pyrolysis characteristics of cable insulation materials at high temperatures are directly related to the occurrence of cable fires. Therefore, in-depth research on the pyrolysis behavior of these materials can provide a key basis for the development of more effective cable fire early warning systems. Understanding the decomposition pattern of cable insulation materials under thermal conditions can help capture early signs of fire, thereby achieving more timely and accurate early warnings, which is of great significance for improving the safety and reliability of electrical systems.

[0004] A Chinese patent (publication number: CN115655812A) discloses a sampling device and a sampling method for the thermal decomposition products of cable insulation layers; the patent includes a mounting plate, a gas collection assembly and a solid collection assembly, wherein the gas collection assembly is a plurality of gas collection assemblies arranged along the arc direction of the mounting plate, and the gas collection assembly includes a collection tube, a piston and an electric telescopic rod, wherein the collection tube and the electric telescopic rod are both fixed on the mounting plate, the piston is fixed on the end of the electric telescopic rod and is located on the inner side of the collection tube, and the end of the collection tube has a collection portion; in actual use, it was found that the patent has a complex structure and is extremely inconvenient to use. Summary of the invention

[0005] In order to overcome the deficiencies in the background technology, the present invention discloses a sampling device for pyrolysis products of cable insulation layers.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A sampling device for pyrolysis products of cable insulation layers comprises a box body, a cover body and a clamping device; the top of the box body is open, and a cover body corresponding to the open position is provided; the left and right sides of the box body are provided with clamping devices for clamping cables; the front and back sides of the box body are provided with electric heating devices; a drawer for collecting pyrolysis products of cable insulation layers is connected to the bottom of the box body; a vent hole is provided on one side of the top of the box body, and an air pump is connected to the other side.

[0007] Preferably, the clamping device comprises a support seat fixedly connected to the inner wall of the box body, a V-shaped groove is provided on the top of the support seat, a pressure block is provided on the top of the support seat, and a V-shaped protrusion corresponding to the V-shaped groove is provided on the bottom of the pressure block.

[0008] Preferably, the tip of the V-shaped protrusion is provided with an arc-shaped groove.

[0009] Preferably, guide rods movably penetrating the pressing block are provided on both sides of the top of the support seat.

[0010] Preferably, a handle is provided on the top of the pressing block.

[0011] Preferably, a one-way valve is provided at the air outlet of the air pump.

[0012] Preferably, the cover is provided with a transparent window.

[0013] Preferably, a temperature sensor is provided in the box.

[0014] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: The present invention discloses a cable insulation layer pyrolysis product sampling device, which has a simple structure and is easy to use; the design of the cover enables the box to be effectively sealed, which not only accelerates the formation of the internal high-temperature environment, but also ensures that the smoke generated during the pyrolysis process can be centrally collected and processed, reducing the impact on the experimental environment and improving the safety and efficiency of the experiment. The transparent window made of heat-resistant glass allows the operator to monitor the pyrolysis reaction in real time without affecting the experimental process, while preventing the risks caused by high temperature and increasing the safety factor of the experiment. The V-shaped slot design of the holding device can adapt to cables of different specifications, and the cooperation between the pressure block and the support seat ensures that the cable is firmly fixed under pyrolysis conditions. This design takes into account the high temperature resistance of the material, ensures the integrity and stability of the structure, and also facilitates the installation and disassembly of the cable. The design of the drawer simplifies the collection process of the cable insulation layer residue after pyrolysis, making this work simple and quick, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a top view of the box; Figure 3 Schematic diagram of the internal structure of the box; Figure 4 It is a schematic diagram of the structure of the clamping device.

[0016] In the figure: 1. box body; 2. cover body; 3. clamping device; 3-1. support seat; 3-2. pressure block; 3-3. guide rod; 3-4. handle; 4. electric heating device; 5. drawer; 6. vent hole; 7. vacuum pump; 8. one-way valve. DETAILED DESCRIPTION

[0017] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0018] Embodiment 1, in combination with Figures 1 to 4 , a sampling device for the pyrolysis products of cable insulation layers, comprising a box body, a cover body and a clamping device; the top of the box body is an open design, matched with a cover body specially designed to close the opening. When conducting a pyrolysis experiment, the box body can be effectively sealed by closing the cover body, which not only helps to quickly reach the required high temperature environment in the box body, but also ensures that the smoke generated during the pyrolysis process will not diffuse at will, but can be collected centrally for subsequent processing or analysis. In addition, the cover body is equipped with a transparent window made of heat-resistant glass, allowing operators to observe the pyrolysis process in a safe manner to prevent the risk of rupture due to high temperature.

[0019] Clamping devices are arranged on both sides of the box to fix the cables. These clamping devices include a support seat firmly connected to the inner wall of the box, on which there is a V-shaped groove to accommodate cables of different specifications. The clamp is located on the support seat, and its bottom shape matches the V-shaped groove, and the cable is stably fixed in the V-shaped groove by its own weight. It is worth noting that the design of the clamping device fully considers the high temperature resistance performance to ensure that the structural integrity can be maintained under pyrolysis conditions. In addition, the tip of the V-shaped protrusion is provided with an arc groove to increase the stability of the clamping; guide rods are installed on both sides of the top of the support seat to ensure that the clamp moves in a straight line when placed and lifted, avoiding the risk of the clamp tilting or falling off due to the large cable diameter. For easy operation, a handle is also provided on the top of the clamp, making the process of clamping or releasing the cable more convenient and efficient.

[0020] The electric heating device is distributed on both sides of the box, responsible for heating the cable and causing it to undergo a pyrolysis reaction. In order to accurately control the pyrolysis temperature, a temperature sensor is installed in the box to monitor and feed back the temperature data in the box to the control system in real time, thereby achieving precise control of the electric heating device.

[0021] A drawer is designed at the bottom of the box to collect the residue of the cable insulation layer after pyrolysis. When the cable is pyrolyzed, the insulation layer can be separated by a cutter, allowing the product to naturally fall into the drawer below, completing the collection work conveniently and quickly.

[0022] In order to manage the gas generated during the pyrolysis process, a vent is provided on one side of the box, and a vacuum pump is connected to the other side. When the vacuum pump is activated during the experiment, the generated gas can be directed to the collection bag connected to it to provide samples for subsequent gas analysis. At the same time, the exhaust port of the vacuum pump is equipped with a one-way valve to prevent the gas in the collection bag from flowing back, ensuring the safety and efficiency of the experiment.

[0023] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A cable insulation layer pyrolysis product sampling device, characterized by: The invention comprises a box body (1), a cover body (2) and a clamping device (3); the box body (1) has an open top, and a cover body (2) corresponding to the top of the box body (1) is provided at a position corresponding to the open top; the box body (1) has clamping devices (3) for clamping cables provided on both left and right sides; the box body (1) has electric heating devices (4) provided on both front and rear sides; the box body (1) has a drawer (5) for collecting thermal decomposition products of the cable insulation layer connected to the bottom of the box body (1); a vent hole (6) is provided on one side of the top of the box body (1), and an air pump (7) is connected on the other side.

2. The cable insulation layer pyrolysis product sampling device according to claim 1, characterized in that: The clamping device (3) comprises a support seat (3-1) which is fastened to the inner side wall of the box body (1), the top of the support seat (3-1) is provided with a V-shaped groove, the top of the support seat (3-1) is provided with a pressing block (3-2), and the bottom of the pressing block (3-2) is provided with a V-shaped protrusion which is adapted to the V-shaped groove.

3. The cable insulation layer pyrolysis product sampling device according to claim 2, characterized in that: The tip of the V-shaped protrusion is provided with an arc groove.

4. The cable insulation layer pyrolysis product sampling device according to claim 2, characterized in that: Both sides of the top of the support seat (3-1) are provided with guide rods (3-3) that movably penetrate the pressing block (3-2).

5. The cable insulation layer pyrolysis product sampling device according to claim 2, characterized in that: A handle (3-4) is provided on the top of the pressing block (3-2).

6. The cable insulation layer pyrolysis product sampling device according to claim 1, characterized in that: A one-way valve (8) is provided at the air outlet end of the air pump (7).

7. The cable insulation layer pyrolysis product sampling device according to claim 1, characterized in that: The cover body (2) is provided with a transparent window.

8. The cable insulation layer pyrolysis product sampling device according to claim 1, characterized in that: A temperature sensor is provided in the box (1).

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