Cable performance detection method and multifunctional cable performance detection equipment

Abstract

The invention relates to the technical field of cable manufacturing, in particular to multifunctional cable performance detection equipment which comprises a bottom plate, a fixed bracket, a combustor, a cable and the like. A plurality of fixed brackets are mounted on the bottom plate; the upper half side and the lower half side of the fixed bracket are detachably connected; the fixing bracket is used for fixing cables; a combustor is installed in the middle of the bottom plate. And the combustor is communicated with an external gas supply device. Compared with a conventional cable fire-resistant performance detection device, the cable fire-resistant performance detection device simulates the conditions of the cable in different fire stages by controlling the rotation of the fixed plate, so that the detection condition better fits the actual fire condition, and the fire-resistant performance of the cable is greatly improved under the condition of single-time detection of the cable. The electrical performance of the cable under the high temperature condition and the fireproof performance under the extreme condition can be detected at the same time, and the accuracy and comprehensiveness of the cable detection result are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable manufacturing, and in particular to a cable performance detection method and multifunctional cable performance detection equipment. Background Art

[0002] Fireproof cables are often used in the power supply system of fire-fighting equipment to ensure that the fire-fighting equipment can work normally during a fire. Therefore, fireproof cables need to undergo a fire resistance test before leaving the factory. In actual fires, there are usually two stages when cables are burned. In the first stage, since the cables are usually placed in cable troughs, when a fire occurs, the open flame first contacts the cable trough, and the cables are heated through the cable trough as a medium for heat conduction. In this stage, the cable temperature gradually increases, and the cable is heated relatively evenly. At this time, the focus is on detecting the electrical properties of the cable such as conductor resistance, shielding performance, and insulation resistance under high temperature conditions. As the fire gradually increases, the degree of burning of the cable enters the second stage. At this time, the cable trough is damaged by the open flame, and the open flame directly contacts the surface of the cable. At this time, the focus is on detecting the fire resistance of the cable under extreme high temperature conditions. Existing cable fire resistance detection devices usually apply open flames to the cable surface for a period of time to detect the fire resistance of the cable when it is directly burned. However, in actual fires, not all cables are directly burned by open flames, which makes the detection conditions of the existing detection devices inconsistent with the actual fire conditions, and thus makes the detection results of the cables incomplete and inaccurate. Summary of the invention

[0003] In order to overcome the shortcomings of existing fireproof cable fire resistance performance testing devices that mainly test the fire resistance performance of cables under direct burning of open flames, fail to simulate the stage of indirect heat transfer through cable troughs at the initial stage of fire, resulting in the test results being inconsistent with the actual fire situation and being incomplete and inaccurate, the present invention provides a multifunctional cable performance testing device.

[0004] The technical implementation scheme of the present invention is: a multifunctional cable performance detection equipment, including a base plate, a fixed bracket, a burner and a cable; a plurality of fixed brackets are installed on the base plate; the upper half and the lower half of the fixed bracket are detachably connected; the fixed bracket is used to fix the cable; a burner is installed in the middle of the base plate; the burner is connected to an external gas supply device; it also includes a driving assembly, a connecting shaft, a fixed plate and an auxiliary system; a driving assembly is installed on the base plate; two left-right symmetrical connecting shafts are connected to the driving assembly; the connecting shaft is driven to move left and right and rotate by the driving assembly; each connecting shaft is fixedly connected to a fixed plate for isolating open flames; a temperature sensor is arranged in the fixed plate; a plurality of support rods are arranged on the lower side of each fixed plate; the fixed plate and the support rods connected thereto form an arc shape together, and the central axis of the connecting shaft is aligned with the center of the arc formed by the fixed plate and the support rods; an auxiliary system for detecting different performances of the cable is installed on the connecting shaft.

[0005] Optionally, the fixing plate is made of a copper alloy material having high thermal conductivity and heat resistance.

[0006] Optionally, the driving assembly includes a slide rail, an electric slider, a mounting frame and a motor; a plurality of slide rails are fixedly connected to the base plate; an electric slider is slidably connected to each slide rail; a mounting frame is connected to the upper side of each electric slider; a motor is fixedly connected to each mounting frame; and each motor is fixedly connected to an adjacent connecting shaft.

[0007] Optionally, it also includes a communicating vessel; each mounting frame is fixedly connected to a communicating vessel; the water inlet of the communicating vessel is connected to an external water supply device; the interior of the communicating vessel is arranged as a hollow structure; the communicating vessel is rotatably connected to the connecting shaft; the interior of the connecting shaft is a hollow structure; a plurality of communicating holes are arranged on the connecting shaft; the communicating holes are all connected to the interior of the connecting shaft; a cavity is opened inside each fixed plate, and the cavity is connected to the interior of the connecting shaft; a plurality of drainage holes for detecting the waterproof performance of the cable are arranged on the inner wall of each fixed plate; all the drainage holes are connected to the cavity.

[0008] Optionally, a plurality of drainage holes are evenly arranged on the inner wall of the fixing plate.

[0009] Optionally, a notch is formed between each fixing plate and the connected supporting rod.

[0010] Optionally, the auxiliary system includes a first limit block; each connecting shaft is fixedly connected to a first limit block for detecting the bending performance of the cable; each first limit block is located above the upper half of the adjacent fixed bracket; each fixed bracket is configured to be slidably connected to the base plate via a spring.

[0011] Optionally, the auxiliary system further includes a second limit block; each connecting shaft is fixedly connected with a second limit block for detecting the tensile strength of the cable; each second limit block is located between adjacent fixed brackets and fixed plates.

[0012] Optionally, the auxiliary system further includes an extrusion plate; each fixing plate is fixedly connected to a side close to the connecting shaft with an extrusion plate for detecting the compression resistance of the cable; the shape of the extrusion plate is set to be an arc.

[0013] A cable performance detection method, characterized in that it includes the following working steps:

[0014] S1: Sampling, cutting off a certain distance of the produced cable, placing the cut cable on a fixed bracket for fixing, and connecting the test control equipment to the cores at both ends of the cable to complete the test preparation;

[0015] S2: Testing, by controlling the testing conditions of the testing device to simulate the cable being in different fire situations, so as to test the fire resistance, electrical performance and mechanical performance of the cable in different fires;

[0016] S3: Recording: During the cable testing process, the test data is classified, recorded and sorted so as to facilitate subsequent analysis of the test data;

[0017] S4: Cleaning: After the cable inspection is completed, the cable is naturally cooled to room temperature and then removed from the fixed bracket. At the same time, the inspection device is cleaned to facilitate subsequent cable inspection.

[0018] The beneficial effects of the present invention are:

[0019] Compared with conventional cable fire resistance performance testing devices, by controlling the rotation of the fixed plate, the cable is simulated in different fire stages, making the testing conditions more in line with the actual fire situation. In the case of a single test of the cable, the electrical performance of the cable under high temperature and the fire resistance performance under extreme conditions can be tested at the same time, thus improving the accuracy and comprehensiveness of the cable test results.

[0020] By controlling the two fixing plates to move in opposite directions, the open flame under the fixing plates can directly burn the cable through the gap between the two fixing plates, simulating the situation where the cable is partially burned by the open flame. This can detect the various electrical properties and fire resistance properties of the cable when the cable is heated unevenly, further diversifying the detection scenarios and meeting different detection needs.

[0021] Compared with the conventional detection device that directly sprays water on the cable surface, after the water flow is sprayed on the cable surface, the fixed plate blocks the water flow from continuing to flow downward, preventing the sprayed water flow from flowing downward to the burner, thereby preventing the water flow from entering the burner and causing damage to the burner, which is beneficial to ensure the service life of the burner. In addition, the cable is wrapped with a large amount of water vapor, thereby simulating the water vapor generated when using water to extinguish a fire, making the detection conditions more in line with the actual fire scene and improving the accuracy of the cable detection results;

[0022] By controlling the rotation of the fixing plate so that the notch is facing directly below the cable, the middle part of the cable is allowed to hang down under the action of gravity, and then the cable is subjected to an impact force along the axis of the cable, thereby simulating the situation in which the cable trough is damaged by open flames in a fire, and the cable is subjected to an impact due to loss of support, thereby testing the cable's impact resistance in a fire and increasing the diversity of cable testing conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the multifunctional cable performance testing device of the present invention from a first viewing angle;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the multifunctional cable performance detection device of the present invention from a second viewing angle;

[0025] Figure 3 It is a schematic diagram of the combined three-dimensional structure of the driving assembly, the connecting shaft and the fixing plate of the present invention;

[0026] Figure 4 It is a combined cross-sectional view of the connecting shaft, the fixing plate and the communicating vessel of the present invention;

[0027] Figure 5 It is a rotation state diagram of the fixed plate of the present invention;

[0028] Figure 6 It is a schematic diagram of the combined three-dimensional structure of the connecting shaft, the first limiting block and the second limiting block of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the cable, fixing plate and extrusion plate combination of the present invention.

[0030] Markings in the accompanying drawings: 1-base plate, 2-fixed bracket, 3-burner, 4-cable, 5-connecting shaft, 5001-connecting hole, 6-fixed plate, 6001-support rod, 6002-cavity, 6003-drainage hole, 6004-notch, 201-slide rail, 202-electric slider, 203-mounting frame, 204-motor, 205-connecting vessel, 301-first limit block, 302-second limit block, 303-extrusion plate. DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0032] Example 1

[0033] like Figure 1-Figure 5 As shown, a multifunctional cable performance testing device includes a base plate 1, a fixing bracket 2, a burner 3 and a cable 4; two left-right symmetrical fixing brackets 2 are installed on the base plate 1; the upper half and the lower half of the fixing bracket 2 are detachably connected; the fixing bracket 2 is used to fix the cable 4; the burner 3 is installed in the middle of the base plate 1; the burner 3 is connected to an external gas supply device;

[0034] It also includes a driving component, a connecting shaft 5, a fixed plate 6 and an auxiliary system; the driving component is installed on the base plate 1; two left-right symmetrical connecting shafts 5 are connected to the driving component; the connecting shafts 5 are driven to move left and right and rotate through the driving component; each connecting shaft 5 is fixedly connected to a fixed plate 6; a temperature sensor is arranged in the fixed plate 6; two support rods 6001 are arranged on the lower side of each fixed plate 6; the fixed plate 6 and the support rod 6001 connected thereto form an arc shape together, and the central axis of the connecting shaft 5 is aligned with the center of the arc formed by the fixed plate 6 and the support rod 6001; an auxiliary system is installed on the connecting shaft 5.

[0035] Furthermore, in order to improve the uniformity of heating of the cable 4, the fixing plate 6 is made of a copper alloy material with high thermal conductivity and heat resistance.

[0036] The driving assembly includes a slide rail 201, an electric slider 202, a mounting frame 203 and a motor 204; two left-right symmetrical slide rails 201 are fixedly connected to the base plate 1; each slide rail 201 is slidably connected to an electric slider 202; a mounting frame 203 is connected to the upper side of each electric slider 202; a motor 204 is fixedly connected to each mounting frame 203; each motor 204 is fixedly connected to the adjacent connecting shaft 5.

[0037] It also includes a communicating vessel 205; each mounting frame 203 is fixedly connected with a communicating vessel 205; the water inlet of the communicating vessel 205 is connected with an external water supply device; the interior of the communicating vessel 205 is arranged as a hollow structure; the communicating vessel 205 is rotatably connected with the connecting shaft 5; the interior of the connecting shaft 5 is a hollow structure; the connecting shaft 5 is provided with a plurality of communicating holes 5001 arranged in a ring shape; the communicating holes 5001 are all connected with the interior of the connecting shaft 5; each fixing plate 6 is provided with a cavity 6002, and the cavity 6002 is connected with the interior of the connecting shaft 5; each fixing plate 6 is provided with a plurality of drainage holes 6003 on the inner wall; all the drainage holes 6003 are connected with the cavity 6002.

[0038] Furthermore, in order to improve the uniformity of water spraying on the cable 4, a plurality of drainage holes 6003 are evenly arranged on the inner wall of the fixing plate 6.

[0039] Furthermore, in order to simulate the situation where the cable 4 loses support and falls during a fire and to increase the diversity of detection conditions for the cable 4 , a notch 6004 is formed between each fixing plate 6 and the connected support rod 6001 .

[0040] The following is a detailed description of the process of testing the fire resistance performance of the cable 4 used for fire fighting equipment:

[0041] First, remove the upper half of the fixed bracket 2, and place the cable 4 on the lower half of the two fixed brackets 2, and then reinstall the upper half of the fixed bracket 2 back to its original position, so that both ends of the cable 4 are fixed on the fixed bracket 2. Initially, the two fixed plates 6 are fitted together, and the middle part of the cable 4 is supported by the support rod 6001 on the lower side of the fixed plate 6, so that the cable 4 is in a straight state, and then the motor 204 is controlled to drive the connecting shaft 5 to rotate, and the two connecting shafts 5 and the two fixed plates 6 are rotated 180 degrees counterclockwise based on the view from right to left, as shown in FIG. Figure 5As shown, the concave arc surface of the fixing plate 6 is made to face the lower side of the cable 4, and then the stripped wire cores at both ends of the cable 4 are connected to the external test control equipment, and the external gas supply device is controlled to deliver gas to the burner 3, and the gas is ignited by the burner 3 to generate an open flame, so that the open flame begins to heat the fixing plate 6. As the temperature of the fixing plate 6 increases, the heat of the fixing plate 6 is gradually transferred to the cable 4, so that the cable 4 is in a high temperature environment. In this process, by controlling the combustion power of the burner 3 and detecting the temperature of the fixing plate 6 by the temperature sensor in the fixing plate 6, the fixing plate 6 is controlled to be at different temperatures, such as the fixing plate 6 is at one hundred degrees Celsius, two hundred degrees Celsius, etc., so as to simulate the situation of the open flame burning the cable trough at the initial stage of the fire. At this time, the electrical properties of the cable 4, such as the conductor resistance, shielding performance, and insulation resistance, are detected by the external test control equipment, so as to detect the electrical performance data of the cable 4 at different temperatures. As the temperature of the cable 4 continues to rise, when the temperature sensor detects that the temperature of the fixing plate 6 reaches the set threshold, the specific threshold can be determined by the actual The temperature is set according to actual needs, such as 300 degrees Celsius, 400 degrees Celsius, etc. At this time, the control motor 204 drives the connecting shaft 5 and the fixing plate 6 to rotate 180 degrees clockwise, so that the cable 4 is exposed to the upper side of the open flame, and the combustion power of the burner 3 is controlled to increase, so that the surface temperature of the cable 4 rises rapidly, thereby simulating the situation that the fire burns the cable trough and the open flame directly burns the cable 4, so as to detect the fire resistance of the cable 4 under extreme high temperature conditions. Compared with the conventional cable 4 fire resistance detection device, by controlling the rotation of the fixing plate 6, the cable 4 is simulated in different fire stages, so that the detection conditions are more in line with the actual fire situation, and the electrical performance of the cable 4 under high temperature conditions and the fire resistance performance under extreme conditions can be detected in the case of a single detection of the cable 4, so as to improve the accuracy and comprehensiveness of the detection results of the cable 4. On this basis, when the open flame starts to heat the fixing plate 6, since the fixing plate 6 is made of a copper alloy material with high thermal conductivity and heat resistance, the temperature on the surface of the fixing plate 6 is relatively uniform, so that the surface of the cable 4 is heated relatively uniformly.

[0042] Furthermore, in the process of heating the cable 4 through the fixed plate 6, the two electric sliders 202 can be controlled to move away from each other on the corresponding slide rails 201, thereby driving the mounting frame 203, the motor 204 and its connecting parts to move away from each other, so that the two fixed plates 6 move away from each other until a gap is left between the two fixed plates 6. At this time, the open flame under the fixed plate 6 can directly burn the cable 4 through the gap, thereby simulating the situation in which a part of the cable 4 is burned by the open flame in the fire, so as to detect the various electrical properties and fire resistance properties of the cable 4 when the cable 4 is partially burned by the open flame, further diversifying the detection scenarios and meeting different detection needs.

[0043] After a fire occurs, water is usually used to extinguish the fire. During this process, water may be sprayed on the cable 4. Therefore, it is necessary to test the waterproof performance of the cable 4 after high-temperature burning. To this end, after the open flame burns the cable 4 for a period of time, the fixing plate 6 is driven to rotate 180 degrees counterclockwise from right to left by controlling the motor 204, so that the concave arc surface of the fixing plate 6 faces the lower side of the cable 4, so that the fixing plate 6 isolates the open flame, and the burner 3 is controlled to be closed, and then the external water supply device is controlled to deliver water to the inside of the communicating vessel 205, so that the water flows into the connecting shaft 5 through the connecting hole 5001, and then enters the cavity 6002, and finally sprays to the cable 4 from the drainage hole 6003, thereby simulating the situation of spraying water on the surface of the cable 4 after high-temperature burning, and then the waterproof performance of the cable 4 is tested by the external test control equipment, which is different from the conventional testing device directly spraying water on the surface of the cable 4 Compared with the water spraying method, after the water flow is sprayed on the surface of the cable 4, the fixed plate 6 blocks the water flow from continuing to flow downward, preventing the sprayed water flow from flowing downward to the burner 3, thereby preventing the water flow from entering the burner 3 and causing damage to the burner 3, which is beneficial to ensuring the service life of the burner 3. In addition, since the temperature on the surface of the fixed plate 6 is still very high at this time, the residual water flow on the surface of the fixed plate 6 is quickly evaporated into water vapor, so that a large amount of water vapor wraps the cable 4, thereby simulating the situation of water vapor generated when using water to extinguish a fire, making the detection conditions more in line with the actual fire scene, and improving the accuracy of the detection results of the cable 4. When the water flow is sprayed from the drainage hole 6003 to the cable 4, the drainage holes 6003 are evenly arranged on the inner wall of the fixed plate 6, thereby improving the uniformity of the water flow spraying on the cable 4, and the water flow can quickly and evenly cover the burned part of the cable 4, thereby improving the detection efficiency.

[0044] On this basis, in order to further test the performance of cable 4 in fire, after cable 4 has been burned by open flame for a long time, the control motor 204 drives the fixing plate 6 to rotate 90 degrees counterclockwise as viewed from right to left, so that the notch 6004 faces directly below the cable 4, thereby making the cable 4 lose the support of the support rod 6001. The cable 4 is only fixed by the fixing brackets 2 at both ends. After the cable 4 loses the support of the support rod 6001, the middle part of the cable 4 droops downward under the action of gravity, causing the cable 4 to be subjected to an impact force along the axial direction of the cable, thereby simulating the situation in which the cable 4 is impacted when it droops downward due to loss of support after the cable trough is damaged by open flame in a fire, thereby testing the impact resistance of the cable 4 in fire and improving the diversity of the detection conditions for the cable 4.

[0045] Example 2

[0046] On the basis of Example 1, Figure 1 and Figure 4-Figure 7As shown, the auxiliary system includes a first limit block 301; each connecting shaft 5 is fixedly connected to a first limit block 301; each first limit block 301 is located above the upper half of the adjacent fixed bracket 2; each fixed bracket 2 is configured to be slidably connected to the base plate 1 through a spring; when the first limit block 301 rotates to the lower side of the connecting shaft 5, the first limit block 301 contacts the surface of the cable 4.

[0047] The auxiliary system also includes a second limit block 302; a second limit block 302 is fixedly connected to each connecting shaft 5; each second limit block 302 is located between adjacent fixed brackets 2 and fixed plates 6; when the second limit block 302 rotates to the lower side of the connecting shaft 5, the first limit block 301 contacts the surface of the cable 4.

[0048] The auxiliary system also includes a squeeze plate 303; each fixing plate 6 is fixedly connected with a squeeze plate 303 near the connecting shaft 5; and the squeeze plate 303 is shaped as an arc inclined in the counterclockwise direction when viewed from right to left.

[0049] A cable performance detection method, characterized in that it includes the following working steps:

[0050] S1: Sampling, cutting off a certain distance of the produced cable 4, placing the cut cable 4 on the fixed bracket 2 for fixing, and connecting the test control equipment to the wire cores at both ends of the cable 4, completing the test preparation work;

[0051] S2: Testing, controlling the testing conditions by controlling the testing device to simulate the scene of the cable 4 being in different fire conditions, so as to test the fire resistance, electrical properties and mechanical properties of the cable 4 in different fire conditions;

[0052] S3: Recording, during the process of testing the cable 4, classifying and recording the test data, so as to facilitate subsequent analysis of the test data;

[0053] S4: Cleaning. After the detection of the cable 4 is completed, the cable 4 is naturally cooled to room temperature and then removed from the fixed bracket 2. At the same time, the detection device is cleaned to facilitate subsequent cable 4 detection.

[0054] The existing fire resistance detection device for detecting the cable 4 usually does not detect the mechanical properties of the cable 4 in a fire, such as bending strength and tensile strength, etc., so that the fire resistance detection data of the cable 4 is incomplete. For this reason, the bending strength and tensile strength of the cable 4 are detected by adding the first limit block 301 and the second limit block 302. It should be noted that when the two fixing plates 6 are fitted to each other, the fixing plate 6 is located directly above the cable 4, the notch 6004 faces the front side, and the position of the first limit block 301 is aligned with the center line of the fixing bracket 2. At this time, the first limit block 301 is aligned with the center line of the fixing bracket 2. During the rotation process, the limit block 301 is difficult to rotate to the lower side of the connecting shaft 5 due to the obstruction of the upper half of the fixed bracket 2. Therefore, when the impact resistance of the cable 4 is improved, it is necessary to control the electric slider 202 to drive the two motors 204 and the connecting shaft 5 to move in opposite directions, thereby driving the two first limit blocks 301 to move in opposite directions, so that the first limit blocks 301 are all away from the corresponding fixed bracket 2, so that the first limit block 301 can rotate to the lower side of the connecting shaft 5, and then control the motor 204 to drive the connecting shaft 5 to rotate 90 degrees clockwise and counterclockwise from right to left, so that the gap 6004 is directed downward, so as to detect the impact resistance of the cable 4. On this basis, after the impact resistance of the cable 4 is detected, the two electric sliders 202 are controlled to move toward each other on the adjacent slide rails 201, thereby driving the two connecting shafts 5 and the fixed plates 6 to move toward each other until the two fixed plates 6 fit each other. During this process, the two first limit blocks 301 move toward each other synchronously, so that the first limit blocks 301 contact and squeeze the adjacent fixed brackets 2, so that the two fixed brackets 2 move toward each other, and the springs between the fixed brackets 2 and the bottom plate 1 are compressed. As the two fixed brackets 2 move toward each other, the two ends of the cable 4 are driven to move toward each other, causing the middle part of the cable 4 to bend downward, and then the two electric sliders 202 are controlled to move away from each other, causing the two first limit blocks 301 to move away from each other until they are separated from the adjacent fixed brackets 2, so that under the action of the spring between the fixed bracket 2 and the bottom plate 1, the fixed bracket 2 is reset and moved, so that the two ends of the cable 4 move to the initial position, and this reciprocating process is repeated, so that the middle part of the cable 4 is bent back and forth, and the bending strength of the cable 4 in a fire is detected, so that the detection items of the detection device are diversified.

[0055] On this basis, after detecting the bending strength of the cable 4, the two electric sliders 202 are controlled to continue to move away from each other, so that the two connecting shafts 5 move away from each other until the second limit block 302 contacts and squeezes the adjacent fixed bracket 2, thereby causing the two fixed brackets 2 to move away from each other, and the spring between the fixed bracket 2 and the base plate 1 is stretched by force, so that the two ends of the cable 4 move away from each other, so that the cable 4 is stretched as a whole, and then the two electric sliders 202 are controlled to move toward each other, so that the two second limit blocks 302 move toward each other and disengage from the adjacent fixed bracket 2, and then the fixed bracket 2 is reset under the action of the spring between the fixed bracket 2 and the base plate 1, so that the two ends of the cable 4 as a whole move to the initial position, and so on and so forth, so that the cable 4 is stretched back and forth, thereby detecting the tensile strength of the cable 4 in a fire, and further enriching the detection items of the detection device.

[0056] Furthermore, after the tensile strength test of the cable 4 is completed, the two ends of the cable 4 are first restored to their initial positions, and then the cable 4 is pushed back into the notch 6004 through an external clamping device. Based on the view from right to left, the motor 204 is controlled to drive the connecting shaft 5 and the fixing plate 6 to rotate clockwise, so that the middle part of the cable 4 contacts the support rod 6001 again, and then the connecting shaft 5 and the fixing plate 6 are controlled to continue to rotate clockwise, so that the fixing plate 6 faces the lower side of the connecting shaft 5. During this process, the squeezing plate 303 rotates clockwise synchronously, and then the fixing plate 6 is controlled to continue to rotate clockwise, so that the squeezing plate 303 contacts and squeezes the surface of the cable 4. By simulating the situation where a heavy object is pressed on the surface of the cable 4 at the fire scene, the pressure resistance performance of the cable 4 in the fire is detected. Compared with the conventional cable 4 fire resistance detection device, while realizing the fire resistance detection of the cable 4 in an extremely high temperature environment, the three mechanical properties of the cable 4, namely the bending strength, tensile strength and pressure resistance strength, can also be detected at the same time, thereby improving the diversity of the cable 4 detection items and improving the detection efficiency.

[0057] A cable 4 performance testing method is characterized in that it includes the following working steps: S: sampling, cutting a distance of produced cable 4, placing the cut cable 4 on a fixed bracket 2 for fixing, and connecting the test control equipment to the wire cores at both ends of the cable 4 to complete the test preparation work; S: testing, controlling the testing conditions by controlling the testing device to simulate the scenes of the cable 4 in different fire conditions, so as to test the fire resistance, electrical properties and mechanical properties of the cable 4 in different fires; S: recording, in the process of testing the cable 4, classifying and recording the test data and arranging them for subsequent analysis of the test data; S: cleaning, after completing the testing of the cable 4, the cable 4 is naturally cooled to room temperature and then removed from the fixed bracket 2, and the testing device is cleaned at the same time to facilitate subsequent cable 4 testing.

[0058] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A cable performance detection method, characterized in that: The following steps are included: S1: sampling, cutting a certain distance from the produced cable (4), placing the cut cable (4) on a fixed bracket (2) for fixing, and connecting the test control equipment to the wire cores at both ends of the cable (4), thus completing the test preparation work; S2: testing, controlling the testing conditions by controlling the testing device to simulate the scene where the cable (4) is in different fire conditions, thereby testing the fire resistance, electrical properties and mechanical properties of the cable (4) in different fire conditions; S3: recording, during the process of testing the cable (4), classifying and recording the test data, so as to facilitate subsequent analysis of the test data; S4: cleaning. After the cable (4) is tested, the cable (4) is naturally cooled to room temperature and then removed from the fixed bracket (2). At the same time, the testing device is cleaned to facilitate subsequent testing of the cable (4).

2. A multifunctional cable performance testing device, which is used for a cable performance testing method as claimed in claim 1, comprising a base plate (1), a fixing bracket (2), a burner (3) and a cable (4); a plurality of fixing brackets (2) are mounted on the base plate (1); the upper half and the lower half of the fixing bracket (2) are detachably connected; the fixing bracket (2) is used to fix the cable (4); a burner (3) is mounted in the middle of the base plate (1); the burner (3) is connected to an external gas supply device; and the characteristics are: The invention also comprises a driving assembly, a connecting shaft (5), a fixing plate (6) and an auxiliary system; the driving assembly is mounted on the bottom plate (1); two connecting shafts (5) are connected to the driving assembly and are symmetrical to each other; the connecting shafts (5) are driven to move left and right and rotate by the driving assembly; each connecting shaft (5) is fixedly connected to a fixing plate (6) for isolating open flames; a temperature sensor is arranged in the fixing plate (6); a plurality of supporting rods (6001) are arranged on the lower side of each fixing plate (6); the fixing plate (6) and the supporting rods (6001) connected thereto form an arc shape together, and the central axis of the connecting shaft (5) is aligned with the center of the arc shape formed by the fixing plate (6) and the supporting rods (6001); an auxiliary system for detecting different properties of the cable (4) is mounted on the connecting shaft (5).

3. A multifunctional cable performance testing device according to claim 2, characterized in that: The fixing plate (6) is made of a copper alloy material having high thermal conductivity and heat resistance.

4. A multifunctional cable performance testing device according to claim 2, characterized in that: The driving assembly comprises a slide rail (201), an electric slider (202), a mounting frame (203) and a motor (204); a plurality of slide rails (201) are fixedly connected to the bottom plate (1); each slide rail (201) is slidably connected to an electric slider (202); the upper side of each electric slider (202) is connected to a mounting frame (203); each mounting frame (203) is fixedly connected to a motor (204); and each motor (204) is fixedly connected to an adjacent connecting shaft (5).

5. A multifunctional cable performance testing device according to claim 4, characterized in that: The apparatus also includes a communicating vessel (205); each mounting frame (203) is fixedly connected with a communicating vessel (205); the water inlet of the communicating vessel (205) is connected to an external water supply device; the interior of the communicating vessel (205) is arranged as a hollow structure; the communicating vessel (205) is rotatably connected to the connecting shaft (5); the interior of the connecting shaft (5) is a hollow structure; a plurality of communicating holes (5001) are arranged on the connecting shaft (5); the communicating holes (5001) are connected to the interior of the connecting shaft (5); a cavity (6002) is provided inside each fixing plate (6), and the cavity (6002) is connected to the interior of the connecting shaft (5); the inner wall of each fixing plate (6) is arranged with a plurality of drainage holes (6003) for detecting the waterproof performance of the cable (4); all the drainage holes (6003) are connected to the cavity (6002).

6. A multifunctional cable performance testing device according to claim 5, characterized in that: A plurality of drainage holes (6003) are evenly arranged on the inner wall of the fixing plate (6).

7. A multifunctional cable performance testing device according to claim 2, characterized in that: A notch (6004) is formed between each fixing plate (6) and the connected supporting rod (6001).

8. A multifunctional cable performance testing device according to claim 5, characterized in that: The auxiliary system comprises a first limit block (301); each connecting shaft (5) is fixedly connected with a first limit block (301) for detecting the bending performance of the cable (4); each first limit block (301) is located above the upper half of an adjacent fixed bracket (2); and each fixed bracket (2) is arranged to be slidably connected to the bottom plate (1) via a spring.

9. A multifunctional cable performance testing device according to claim 8, characterized in that: The auxiliary system also includes a second limit block (302); each connecting shaft (5) is fixedly connected with a second limit block (302) for detecting the tensile strength of the cable (4); each second limit block (302) is located between adjacent fixed brackets (2) and fixed plates (6).

10. A multifunctional cable performance testing device according to claim 9, characterized in that: The auxiliary system also includes a squeezing plate (303); each fixing plate (6) is fixedly connected to a squeezing plate (303) on the side close to the connecting shaft (5) for detecting the compression resistance of the cable (4); the squeezing plate (303) is arranged to be in an arc shape.

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