An automatic fire-induction test device for bundled cables

Abstract

This application relates to an automatic ignition testing device for bundled cable combustion, comprising a combustion chamber, a burner, and a drive mechanism. An openable and closable door is provided on one side of the combustion chamber, and a detachable cable rack is provided on the other side. The burner is disposed within the combustion chamber and can reciprocate horizontally. The drive mechanism, used to move the burner closer to or away from the cable rack, includes a guide rail, a base, a lead screw, and a drive motor. The guide rail is horizontally disposed at the bottom of the combustion chamber, the base is secured to the guide rail and can move back and forth along the guide rail, and the burner is detachably disposed on the base. The lead screw is rotatably disposed on the guide rail and threadedly connected to the base. The movable end of the drive motor is connected to the lead screw. The guide rail ensures stable linear movement of the burner, and the drive motor enables repeatable back-and-forth motion, thereby accurately reaching and maintaining the distance between the burner nozzle and the cable, eliminating manual handling and repeated alignment, and improving test preparation and operational efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cable manufacturing technology, specifically to an automatic fire-induction test device for bundled cables. Background Technology

[0002] The common practice in the industry is to manually move the burner and the steel frame: the burner is fixed on a four-corner steel stool or a simple support. During the test, the burner is manually moved to the specified position and repeatedly adjusted by hand. The cable steel frame is first placed horizontally in front of the combustion chamber door. The overhead crane that moves up and down on the top of the combustion chamber is used to hoist the steel frame from the front of the door to the vertical position. Then the test personnel manually lift the steel frame into the fixed support of the combustion chamber. The method has the following main technical problems and safety hazards: First, manual handling is inefficient and the test preparation time is long, making it difficult to meet the needs of batch and high-turnover testing; Second, the positioning distance (75±5mm) between the burner flame nozzle and the cable is strictly required, but manual handling requires multiple fine-tuning adjustments, resulting in poor positioning accuracy and repeatability, affecting the consistency and comparability of test results; Third, the combustion chamber temperature is high after combustion, and the burner cannot be safely removed in time, delaying the preparation of the next batch; Fourth, the safety is poor: personnel need to approach or enter the combustion chamber for hoisting or handling, posing a risk of burns; In addition, the fit between the cable and the steel ladder decreases after combustion, and the weight of the steel frame itself is heavy, and the total weight is further increased by binding the cable. In high-temperature environments, manual handling by inspectors can easily cause the cable rack or burner to collapse and injure personnel, posing a major safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide an automatic ignition test device for bundled cable combustion. This device ensures stable linear movement of the burner via guide rails, controllable stroke and positioning accuracy via a threaded connection between the lead screw and the base, and repeatable back-and-forth motion via a drive motor. This allows for precise positioning and maintaining of the burner nozzle at a distance of 75±5mm from the cable (while the distance between the burner and the base plate can be adjusted via base height). This eliminates the need for manual handling and repeated alignment, improving test preparation and operational efficiency. The detachable cable rack allows for hoisting outside the combustion chamber or direct hoisting / removal from the opposite side of the combustion chamber before and after combustion, avoiding the need for personnel to enter the combustion chamber for hoisting operations and reducing the risk of personnel exposure to high temperatures and harmful gases.

[0004] To achieve the above objectives, this utility model provides an automatic fire-induction test device for bundled cables, comprising: The combustion chamber has an openable door on one side and a detachable cable rack on the other side. The burner is disposed within the combustion chamber and can reciprocate horizontally; A drive mechanism for moving the burner closer to or away from the cable rack includes: The guide rail is horizontally installed at the bottom of the combustion chamber. The base is secured on the guide rail and can move back and forth along the guide rail, and the burner is detachably mounted on the base; A lead screw is rotatably mounted on the guide rail and threadedly connected to the base; A drive motor, the movable end of which is connected to the lead screw.

[0005] Optionally, limit switches are provided at both ends of the guide rail.

[0006] Optionally, the guide rail is located at the center of the combustion chamber.

[0007] Optionally, a clearance groove is provided at the bottom of the combustion chamber, the drive motor is disposed in the clearance groove, the movable end of the drive motor extends into the combustion chamber through the bottom of the combustion chamber, and a coupling is provided between the movable end of the drive motor and the lead screw.

[0008] Optionally, the burner is fixed to the base by bolts or clips.

[0009] Optionally, a controller is provided on the outside of the combustion chamber, and the controller is connected to the drive motor and the limit switch.

[0010] Optionally, a connection port is provided on the outside of the combustion chamber, and the connection port is connected to the burner via a hose for supplying propane and compressed air to the burner.

[0011] The beneficial effects of this utility model are as follows: the guide rail ensures stable linear movement of the burner; the threaded connection between the lead screw and the base ensures controllable stroke and positioning accuracy; and the drive motor enables repeatable back-and-forth motion, thereby accurately achieving and maintaining a distance of 75±5mm between the burner nozzle and the cable (while the distance between the burner and the base plate can be ensured by adjusting the height of the base), eliminating the need for manual handling and repeated alignment, and improving the efficiency of test preparation and operation; the detachable cable rack allows for hoisting outside the combustion chamber or direct hoisting and disassembly from the opposite side of the combustion chamber before and after combustion, avoiding personnel entering the combustion chamber for hoisting operations and reducing the risk of personnel exposure to high temperatures and harmful atmospheres.

[0012] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1This is a schematic structural diagram of an automatic fire-induction test device for bundled cables, as shown in an embodiment of the present invention. Figure 2 This is a schematic structural diagram of the drive mechanism of an automatic fire-induction test device for bundled cables, as shown in an embodiment of the present invention. In the diagram: 1. Combustion chamber; 11. Chamber door; 12. Cable rack; 13. Clearance groove; 2. Burner; 3. Drive mechanism; 31. Guide rail; 32. Base; 33. Lead screw; 34. Drive motor; 35. Coupling; 4. Limit switch; 5. Controller; 6. Connection port. Detailed Implementation

[0014] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] Please see Figure 1 and Figure 2A preferred embodiment of this application shows an automatic ignition test device for bundled cable combustion, comprising a combustion chamber 1, a burner 2, and a drive mechanism 3. The combustion chamber 1 has an openable door 11 on one side and a detachable cable rack 12 on the other side. The burner 2 is disposed within the combustion chamber 1 and can reciprocate horizontally. The drive mechanism 3, used to move the burner 2 closer to or further away from the cable rack 12, includes a guide rail 31, a base 32, a lead screw 33, and a drive motor 34. The guide rail 31 is horizontally disposed at the bottom inner side of the combustion chamber 1. The base 32 is engaged with the guide rail 31 and can move back and forth along the guide rail 31. The burner 2 is detachably disposed on the base 32. The lead screw 33 is rotatably disposed on the guide rail 31 and threadedly connected to the base 32. The movable end of the drive motor 34 is connected to the lead screw 33.

[0018] According to the embodiment of this utility model, the guide rail 31 ensures that the burner 2 moves stably along a straight line, the threaded connection between the lead screw 33 and the base 32 ensures that the stroke is controllable and the positioning accuracy is high, and the drive motor 34 enables repeatable back-and-forth motion. This allows the burner 2 nozzle to be accurately positioned and kept 75±5mm from the cable (the distance between the burner 2 and the base plate can be adjusted by the height of the base 32). This eliminates the need for manual handling and repeated alignment, improving the efficiency of test preparation and operation. The detachable cable rack 12 allows the burner to be hoisted outside the combustion chamber 1 or directly hoisted and disassembled from the opposite side of the combustion chamber 1 before and after combustion, avoiding the need for personnel to enter the combustion chamber 1 for hoisting operations and reducing the risk of personnel being exposed to high temperatures and harmful atmospheres.

[0019] The following detailed description uses specific examples: Please see Figure 1 and Figure 2 Limit switches 4 are installed at both ends of the guide rail 31. A controller 5 is installed on the outside of the combustion chamber 1, and the controller 5 is connected to the drive motor 34. When the base 32 moves to the specified approach position or returns to the original position, the limit switch 4 triggers the drive motor 34 to stop, preventing overtravel or collision and improving positioning reliability; the limit switch 4 signal can be fed back to the controller 5, and the controller 5 panel is equipped with a status indicator light, which lights up when the base 32 reaches the limit.

[0020] The guide rail 31 is positioned at the center of the combustion chamber 1, ensuring that the burner 2 moves along the centerline of the combustion chamber 1. This makes the burner 2's flame trajectory approximately symmetrical to the cable rack 12's centerline, structurally preventing eccentricity caused by manual handling and automatically aligning the flame with the cable, thus improving test repeatability and data comparability. Specifically, the guide rail 31 is made of alloy material, offering high temperature and wear resistance, and is easy to process and install; the lead screw 33 is made of nickel-plated alloy, providing high transmission speed, stable transmission, and easy installation and maintenance.

[0021] Specifically, please see Figure 1 and Figure 2 The combustion chamber 1 has a clearance groove 13 at its bottom, and the drive motor 34 is housed within the clearance groove 13. The movable end of the drive motor 34 extends into the combustion chamber 1 through the bottom of the combustion chamber 1. A coupling 35 is provided between the movable end of the drive motor 34 and the lead screw 33. This arrangement, placing the drive motor 34 in the clearance groove 13, reduces the direct exposure of the drive motor 34 to the high-temperature environment, facilitating motor heat dissipation and maintenance. The connection between the movable end extending into the bottom of the combustion chamber 1 and the coupling 35 achieves sealed isolation and rigid transmission, facilitating replacement and maintenance. Simultaneously, it makes the internal spatial layout of the combustion chamber 1 flatter, reducing interference with the internal structure of the combustion chamber 1.

[0022] The burner 2 is fixed to the base 32 by bolts or clips. The base 32 is made of high-temperature resistant and wear-resistant alloy material. The bolts or clips secure the burner 2, which not only ensures that the height of the flame center of the burner 2 can be adjusted by the base 32 to meet the distance to the bottom plate, but also facilitates the quick disassembly, maintenance and replacement of the burner 2, improving the maintainability of the equipment and the convenience of on-site installation.

[0023] Please see Figure 1 The combustion chamber 1 has a connection port 6 on its outer side, which is connected to the burner 2 via a hose for supplying propane and compressed air to the burner 2. Placing the fuel and air connection port 6 outside the combustion chamber 1 facilitates external gas access, leak detection, and emergency shut-off control, reducing the risk of gas operation inside the combustion chamber 1. This external connection port 6, in conjunction with the hose connection, also facilitates the disassembly, assembly, and routine maintenance of the burner 2.

[0024] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0025] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic fire-induction test device for bundled cables, characterized in that, include: The combustion chamber has an openable door on one side and a detachable cable rack on the other side. The burner is disposed within the combustion chamber and can reciprocate horizontally; A drive mechanism for moving the burner closer to or away from the cable rack includes: The guide rail is horizontally installed at the bottom of the combustion chamber. The base is secured on the guide rail and can move back and forth along the guide rail, and the burner is detachably mounted on the base; A lead screw is rotatably mounted on the guide rail and threadedly connected to the base; A drive motor, the movable end of which is connected to the lead screw.

2. The automatic fire-induction test device for bundled cables according to claim 1, characterized in that, Limit switches are installed at both ends of the guide rail.

3. The automatic fire-induction test device for bundled cables according to claim 1, characterized in that, The guide rail is located at the center of the combustion chamber.

4. The automatic fire-induction test device for bundled cables according to claim 1, characterized in that, The bottom of the combustion chamber is provided with a clearance groove, the drive motor is disposed in the clearance groove, the movable end of the drive motor extends into the combustion chamber through the bottom of the combustion chamber, and a coupling is provided between the movable end of the drive motor and the lead screw.

5. The automatic fire-induction test device for bundled cables according to claim 1, characterized in that, The burner is fixed to the base by bolts or clips.

6. The automatic fire-induction test device for bundled cables according to claim 2, characterized in that, A controller is installed outside the combustion chamber, and the controller is connected to the drive motor and the limit switch.

7. The automatic fire-induction test device for bundled cable combustion according to claim 1, characterized in that, A connection port is provided on the outside of the combustion chamber, and the connection port is connected to the burner via a hose for supplying propane and compressed air to the burner.

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