Cable and wire low-smoke detection device

Abstract

The utility model discloses a low-smoke detection device for cables and wires, which belongs to the technical field of cable and wire detection and solves the problem that the smoke absorption efficiency is low due to the fact that an extrusion plate of an existing device can only push smoke upwards and the speed of the smoke entering a box body is low. A detection box is fixedly mounted on the top surface of the absorption box; an exhaust assembly is arranged in the absorption box, an air conveying assembly is arranged in the detection box, an air inlet hopper is arranged on the top face of an exhaust hopper in a covering mode, air is blown into an air inlet pipe through a draught fan, and then external air sequentially enters a conveying pipe, a corrugated pipe, a hydraulic rod and the exhaust hopper through the air inlet pipe; the flue gas can be conveyed into an alkaline solution in the absorption box, then the flue gas is absorbed by the alkaline solution, and external air enters the absorption box and the detection box and is exhausted through an exhaust pipe, so that the absorption efficiency of the flue gas is favorably improved.

Description

Technical Field

[0001] This utility model relates to the field of cable and wire testing technology, specifically to a cable and wire low-smoke testing device. Background Technology

[0002] The low-smoke performance test of cables and wires refers to a testing method that uses specific methods and equipment to measure and evaluate the characteristics of the smoke produced by cables and wires when they are burning, in order to determine whether they meet relevant standards and requirements.

[0003] A search revealed that patent application number 202321813720.0 discloses a low-smoke performance testing device for cables and wires, comprising a testing box, a support leg at the bottom of the testing box, a horizontal plate mounted on the surface of the support leg, a threaded cylinder vertically and movably mounted on the top surface of the horizontal plate, a screw screw helically connected inside the threaded cylinder, one end of the screw penetrating a pressing plate at the bottom surface of the testing box, a stepper motor vertically mounted on the top surface of the horizontal plate, a drive gear at the output end of the stepper motor, a driven gear on the outer surface of the threaded cylinder, the drive gear meshing with the driven gear, a testing mechanism mounted on the top surface of the testing box, and the bottom end of the testing mechanism being connected to the testing box through a first conveying pipe;

[0004] Although this low-smoke detection device for cables and wires can push the flue gas upwards through the coordinated use of a squeezing plate, a horizontal plate, a threaded cylinder, a screw, a stepper motor, a driving gear, and a driven gear, the squeezing plate can only push the flue gas upwards. The flue gas enters the chamber via a single path with significant resistance, preventing it from quickly and fully contacting the absorption medium inside the chamber. This slow flue gas transmission rate severely limits the effective interaction time between the flue gas and the absorption medium, resulting in low absorption efficiency and failing to meet the actual requirements for efficient flue gas treatment.

[0005] Therefore, we propose a low-smoke detection device for cables and wires. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a low-smoke detection device for cables and wires, which solves the problem that the existing device's extrusion plate can only push the smoke upwards, and the smoke enters the chamber at a slow rate, resulting in low smoke absorption efficiency.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a low-smoke detection device for cables and wires, comprising an absorption box containing an alkaline solution, a detection box fixedly installed on the top surface of the absorption box, a smoke detector fixedly installed in the middle of the top surface of the detection box, and a door hinged to the detection box.

[0008] The absorption box is equipped with an exhaust assembly, and the detection box is equipped with an air delivery assembly.

[0009] The exhaust assembly includes an exhaust hopper, the bottom of which extends into the alkaline solution inside the absorption tank. A placement cylinder is provided at the top of the inner wall of the exhaust hopper, and an electric heating wire connected to a power source via a wire is fixedly installed on the bottom surface inside the placement cylinder.

[0010] The air delivery assembly includes an air intake hopper positioned directly above the exhaust hopper. The diameter of the bottom surface of the air intake hopper is the same as the diameter of the top surface of the exhaust hopper. A corrugated pipe is fixedly connected to the top of the air intake hopper. A delivery pipe connected to the detection end of a flue gas detector is fixedly connected to the top of the corrugated pipe. A second solenoid valve is installed at the top of the outer surface of the delivery pipe. An air intake pipe is fixedly installed on the side wall of the delivery pipe. The top of the air intake pipe extends to the outside of the detection box and is connected to the output end of the fan via a flange. A one-way valve is installed at the bottom of the air intake pipe. A hydraulic rod is fixedly installed on the outer surface of the air intake hopper.

[0011] Preferably, the fan is fixedly installed on the top surface of the test box, and the top end of the hydraulic rod is fixedly installed on the top surface inside the test box. Rubber pads are adhered to the surfaces of the air inlet and exhaust hoppers that come into contact with each other. The fan can deliver external air into the air inlet pipe, and the hydraulic rod can drive the air inlet hopper to move up and down.

[0012] Preferably, an exhaust pipe connected to the interior of the test chamber is fixedly installed on the side wall of the test chamber. A first solenoid valve is installed on the exhaust pipe. The one-way valve controls the gas inside the delivery pipe to prevent it from being discharged through the inlet pipe. The exhaust pipe and the first solenoid valve are designed to allow air inside the test chamber and the absorption chamber to circulate through the exhaust pipe, thereby balancing the pressure inside the test chamber and the absorption chamber with the external air pressure.

[0013] Preferably, the outer surface of the top of the exhaust hopper is fixedly mounted with connecting plates arranged in a ring array, and the end of the connecting plate away from the exhaust hopper is fixedly mounted on the inner wall of the absorption box, wherein the exhaust hopper is supported by the connecting plates.

[0014] Preferably, the outer surface of the placement cylinder is fixedly equipped with connecting rods arranged in a ring array, and the end of the connecting rod away from the placement cylinder is fixedly installed on the inner wall of the exhaust hopper. The top surface of the placement cylinder is flush with the top surface of the exhaust hopper, wherein the placement cylinder is supported by the connecting rods.

[0015] Preferably, a heat-conducting plate is fixedly installed on the top of the electric heating wire. The heat-conducting plate is fixedly fitted on the inner wall of the placement cylinder. The top of the electric heating wire is in contact with the bottom surface of the heat-conducting plate. The heat generated by the electric heating wire is conducted through the heat-conducting plate, thereby heating and igniting the cable and wire placed inside the placement cylinder.

[0016] This invention provides a device for testing the low smoke performance of cables and wires. It has the following advantages:

[0017] 1. This low-smoke detection device for cables and wires, by placing the inlet hood on the top surface of the exhaust hood, allows the smoke generated by the combustion of cables and wires to collect inside the exhaust hood, inlet hood, corrugated pipe, conveying pipe, and inlet pipe. A one-way valve prevents the smoke from escaping through the inlet pipe. After testing, a fan blows air into the inlet pipe, and then external air enters the conveying pipe, corrugated pipe, hydraulic rod, and exhaust hood sequentially through the inlet pipe. This transports the smoke to the alkaline solution inside the absorption chamber, where it is absorbed. External air then enters the absorption chamber and detection chamber and is exhausted through the exhaust pipe. This improves the smoke absorption efficiency and solves the problem in existing devices where the extrusion plate can only push the smoke upwards, resulting in a slow rate of smoke entering the chamber and thus low absorption efficiency.

[0018] 2. The low-smoke performance testing device for cables and wires uses an electric heating wire and a heat-conducting plate to heat and ignite the cables and wires. This process is carried out after the air inlet hood is placed on top of the exhaust hood, eliminating the need for testing personnel to ignite the cables and wires externally. This helps to prevent testing personnel from inhaling smoke and makes the device safer to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a cross-sectional view of the exhaust assembly of this utility model;

[0022] Figure 4 This utility model Figure 3 A magnified structural diagram at point A;

[0023] Figure 5 This is a schematic diagram of the air delivery component structure of this utility model.

[0024] In the diagram: 1. Absorption box; 2. Detection box; 21. Box door; 22. Exhaust pipe; 23. First solenoid valve; 3. Flue gas detector; 31. Delivery pipe; 32. Second solenoid valve; 4. Air delivery assembly; 41. Inlet hopper; 42. Hydraulic rod; 43. Bellows; 44. Inlet pipe; 45. Check valve; 46. Fan; 5. Exhaust assembly; 51. Exhaust hopper; 52. Connecting plate; 53. Placement cylinder; 54. Connecting rod; 55. Heat-conducting plate; 56. Electric heating wire. Detailed Implementation

[0025] 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.

[0026] Example 1:

[0027] like Figure 1-5 As shown: It includes an absorption box 1 containing an alkaline solution, a detection box 2 is fixedly installed on the top surface of the absorption box 1, a flue gas detector 3 is fixedly installed in the middle of the top surface of the detection box 2, and a box door 21 is hinged to the detection box 2.

[0028] The absorption box 1 is equipped with an exhaust assembly 5, and the detection box 2 is equipped with an air delivery assembly 4.

[0029] The exhaust assembly 5 includes an exhaust hopper 51, the bottom end of which extends into the alkaline solution inside the absorption box 1. A placement cylinder 53 is provided at the top of the inner wall of the exhaust hopper 51, and an electric heating wire 56 connected to a power source via a wire is fixedly installed on the bottom surface inside the placement cylinder 53.

[0030] The air delivery assembly 4 includes an air intake hopper 41 positioned directly above the exhaust hopper 51. The diameter of the bottom surface of the air intake hopper 41 is the same as the diameter of the top surface of the exhaust hopper 51. A bellows 43 is fixedly connected to the top of the air intake hopper 41. A delivery pipe 31 connected to the detection end of the flue gas detector 3 is fixedly connected to the top of the bellows hopper 43. A second solenoid valve 32 is installed on the top of the outer surface of the delivery pipe 31. An air intake pipe 44 is fixedly installed on the side wall of the delivery pipe 31. The top of the air intake pipe 44 extends to the outside of the detection box 2 and is connected to the output end of the fan 46 through a flange. A one-way valve 45 is installed at the bottom of the air intake pipe 44. A hydraulic rod 42 is fixedly installed on the outer surface of the air intake hopper 41.

[0031] Furthermore, the blower 46 is fixedly installed on the top surface of the test box 2, the top end of the hydraulic rod 42 is fixedly installed on the top surface inside the test box 2, and rubber pads are glued to the surfaces of the air inlet hopper 41 and the exhaust hopper 51 that come into contact with each other.

[0032] The fan 46 can deliver outside air into the air intake pipe 44, and the hydraulic rod 42 can drive the air intake bucket 41 to move up and down.

[0033] Furthermore, an exhaust pipe 22 connected to the interior is fixedly installed on the side wall of the test box 2. A first solenoid valve 23 is installed on the exhaust pipe 22, and a one-way valve 45 controls the gas inside the delivery pipe 31 to be unable to be discharged through the intake pipe 44.

[0034] The exhaust pipe 22 and the first solenoid valve 23 are designed to allow air inside the detection box 2 and the absorption box 1 to circulate through the exhaust pipe 22, thereby balancing the pressure inside the detection box 2 and the absorption box 1 with the external air pressure.

[0035] Furthermore, a connecting plate 52 arranged in a ring array is fixedly installed on the outer surface of the top of the exhaust hopper 51, and the end of the connecting plate 52 away from the exhaust hopper 51 is fixedly installed on the inner wall of the absorption box 1.

[0036] The exhaust hopper 51 is supported by the connecting plate 52.

[0037] Furthermore, connecting rods 54 arranged in a ring array are fixedly installed on the outer surface of the placement cylinder 53. The end of the connecting rod 54 away from the placement cylinder 53 is fixedly installed on the inner wall of the exhaust hopper 51, and the top surface of the placement cylinder 53 is flush with the top surface of the exhaust hopper 51.

[0038] The placement cylinder 53 is supported by the connecting rod 54.

[0039] Furthermore, a heat-conducting plate 55 is fixedly installed on the top of the electric heating wire 56. The heat-conducting plate 55 is fixedly fitted on the inner wall of the placement cylinder 53, and the top of the electric heating wire 56 is in contact with the bottom surface of the heat-conducting plate 55.

[0040] The heat generated by the electric heating wire 56 is conducted through the heat-conducting plate 55, which in turn heats and ignites the cable and wire placed inside the placement cylinder 53.

[0041] The working principle and usage process of this utility model: When using this low-smoke detection device for cables and wires, the cable and wire to be tested is placed inside the placement cylinder 53, then the box door 21 is closed, and then the hydraulic rod 42 is activated to push the air inlet hopper 41 downward so that the bottom surface of the air inlet hopper 41 contacts the top surface of the exhaust hopper 51. Then the electric heating wire 56 is energized to generate heat, and then the heat is conducted to the cable and wire through the placement cylinder 53, which then ignites the cable and wire. The smoke generated by the combustion of the cable and wire enters the interior of the corrugated pipe 43 through the air inlet hopper 41, and then enters the detection end of the 33 through the conveying pipe 31, so that the smoke detector 3 can detect the smoke generated by the combustion of the cable and wire.

[0042] After the test is completed, the first solenoid valve 23 is opened and the fan 46 is started to blow air into the air inlet pipe 44. Then, the external air enters the delivery pipe 31, the corrugated pipe 43, the hydraulic rod 42 and the exhaust hopper 51 through the air inlet pipe 44 in sequence, which can transport the flue gas to the alkaline solution inside the absorption box 1. Then the flue gas is absorbed by the alkaline solution, and the external air enters the interior of the absorption box 1 and the detection box 2 and is discharged through the exhaust pipe 22.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-smoke detection device for cables and wires, comprising an absorption box (1) containing an alkaline solution, a detection box (2) fixedly installed on the top surface of the absorption box (1), a smoke detector (3) fixedly installed in the middle of the top surface of the detection box (2), and a door (21) hinged to the detection box (2). Its features are: The absorption box (1) is equipped with an exhaust assembly (5), and the detection box (2) is equipped with an air delivery assembly (4). The exhaust assembly (5) includes an exhaust hopper (51), the bottom end of which extends into the alkaline solution inside the absorption box (1). A placement cylinder (53) is provided at the top of the inner wall of the exhaust hopper (51), and an electric heating wire (56) connected to a power source via a wire is fixedly installed on the bottom surface inside the placement cylinder (53). The air delivery assembly (4) includes an air intake hopper (41) located directly above the exhaust hopper (51). The diameter of the bottom surface of the air intake hopper (41) is the same as the diameter of the top surface of the exhaust hopper (51). A bellows pipe (43) is fixedly connected to the top of the air intake hopper (41). A delivery pipe (31) connected to the detection end of the flue gas detector (3) is fixedly connected to the top of the outer surface of the delivery pipe (31). A second solenoid valve (32) is installed at the top of the outer surface of the delivery pipe (31). An air intake pipe (44) is fixedly installed on the side wall of the delivery pipe (31). The top of the air intake pipe (44) extends to the outside of the detection box (2) and is connected to the output end of the fan (46) through a flange. A one-way valve (45) is installed at the bottom of the air intake pipe (44). A hydraulic rod (42) is fixedly installed on the outer surface of the air intake hopper (41).

2. The cable and wire low-smoke performance testing device according to claim 1, characterized in that: The fan (46) is fixedly installed on the top surface of the test box (2), the top end of the hydraulic rod (42) is fixedly installed on the top surface inside the test box (2), and rubber pads are glued to the surfaces of the air inlet hopper (41) and the exhaust hopper (51) that are in contact.

3. The cable and wire low-smoke performance testing device according to claim 1, characterized in that: An exhaust pipe (22) connected to the inside of the test box (2) is fixedly installed on the side wall. A first solenoid valve (23) is installed on the exhaust pipe (22). The one-way valve (45) controls the gas inside the delivery pipe (31) to be unable to be discharged through the inlet pipe (44).

4. The cable and wire low-smoke performance testing device according to claim 1, characterized in that: A connecting plate (52) arranged in a ring array is fixedly installed on the outer surface of the top of the exhaust hopper (51). The end of the connecting plate (52) away from the exhaust hopper (51) is fixedly installed on the inner wall of the absorption box (1).

5. The cable and wire low-smoke performance testing device according to claim 1, characterized in that: The outer surface of the placement cylinder (53) is fixedly installed with connecting rods (54) arranged in a ring array. The end of the connecting rod (54) away from the placement cylinder (53) is fixedly installed on the inner wall of the exhaust hopper (51). The top surface of the placement cylinder (53) is flush with the top surface of the exhaust hopper (51).

6. The cable and wire low-smoke performance testing device according to claim 1, characterized in that: A heat-conducting plate (55) is fixedly installed on the top of the electric heating wire (56). The heat-conducting plate (55) is fixedly fitted on the inner wall of the placement cylinder (53). The top of the electric heating wire (56) is in contact with the bottom surface of the heat-conducting plate (55).

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