Cable fire resistance tester

Abstract

The utility model discloses a cable fire resistance tester, which comprises a shell, a combustion box and a clamping mechanism, a sealing door is hinged to the right side face of the shell through hinges, a handle is fixedly connected to the bottom end of the right side face of the sealing door, and a perspective window is arranged in the sealing door; the combustion box is fixedly connected to the bottom wall of the shell, and solid alcohol blocks which are uniformly distributed are placed in the combustion box; the clamping mechanism comprises sliding blocks, sliding grooves, clamping plates and a placement groove, the sliding grooves are formed in the left end and the right end of the top wall of the shell, the sliding blocks are slidably connected to the inner walls of the sliding grooves, and the lower surfaces of the two longitudinally adjacent sliding blocks are fixedly connected with one clamping plate. The state of the cable in practical application can be better simulated by clamping one end of the cable, the fixing mode is closer to the real situation, evaluation of the performance table of the cable in the practical use environment is facilitated, and meanwhile interference of external factors on testing can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cable processing, in particular to a cable fire resistance performance tester. Background Art

[0002] The cable fire resistance performance tester is a test equipment used to evaluate the fire resistance performance of cables under fire conditions. This tester can usually be used to test the performance of cables in terms of flame contact, combustion, etc., and the cable fire resistance performance tester is very important for evaluating the performance of cables under fire conditions, which can help improve the safety and reliability of cables. At the same time, it also provides necessary test data and guidance for the research and development and production of cables. The traditional cable fire resistance performance tester uses a bracket or support structure to set up the cable to keep it horizontal or vertical. The bracket fixing method can ensure that the cable is not disturbed by the outside world during the test and maintains a fixed position and posture. There are some problems. The traditional cable fire resistance performance tester bracket or support structure fixes the cable in a way that may affect the actual performance of the cable sample to a certain extent, which may cause the test results to deviate from the actual situation. At the same time, it is easy for the bracket itself to cause vibration or interference during the test, affecting the stability and reliability of the test. For this reason, we propose a cable fire resistance performance tester. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a cable fire resistance performance tester. Clamping one end of the cable can better simulate the state of the cable in actual application. This fixing method is closer to the actual situation and is helpful to evaluate the performance of the cable in the actual use environment. At the same time, it can reduce the interference of external factors on the test, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cable fire resistance performance tester, comprising a housing, a combustion box and a clamping mechanism;

[0005] Shell: The right side of the shell is hinged with a sealing door, the bottom end of the right side of the sealing door is fixedly connected with a handle, and the inside of the sealing door is provided with a perspective window;

[0006] Combustion box: It is fixedly connected to the bottom wall of the shell, and evenly distributed solid alcohol blocks are placed inside the combustion box;

[0007] Clamping mechanism: It includes a slider, a slide groove, a clamping plate and a placement groove. The slide grooves are opened at the left and right ends of the top wall of the shell. The inner walls of the slide grooves are slidably connected with sliders. The lower surfaces of the two longitudinally adjacent sliders are fixedly connected to a clamping plate. The inner sides of the two clamping plates are opened with placement grooves. A cable is arranged in the middle of the two placement grooves that constitute the whole. Clamping one end of the cable can better simulate the state of the cable in actual application. This fixing method is closer to the real situation, which is helpful to evaluate the performance of the cable in the actual use environment, and can reduce the interference of external factors on the test.

[0008] Furthermore, it also includes a single-chip microcomputer, which is arranged at the upper end of the front side of the shell, and the input end of the single-chip microcomputer is electrically connected to an external power supply to facilitate the regulation of the operation of various electrical appliances.

[0009] Furthermore, it also includes a temperature display, which is arranged at the lower end of the front side of the shell, and the input end of the temperature display is electrically connected to the output end of the single-chip microcomputer, which helps to observe and understand the temperature change of the sample more clearly.

[0010] Furthermore, it also includes a temperature sensor, which is arranged at the left end of the upper surface of the shell. The detection probe of the temperature sensor extends to the inside of the shell. The temperature sensor is bidirectionally electrically connected to the single-chip microcomputer to facilitate temperature detection.

[0011] Furthermore, an exhaust pipe is fixedly connected to the exhaust hole at the right end of the upper surface of the shell, and an air valve is provided on the inner wall of the exhaust pipe to ensure the circulation of air.

[0012] Furthermore, the clamping mechanism also includes a moving block, a V-shaped groove, a rotating shaft and a guide groove. The guide groove is opened on the top wall of the shell, and the inner wall of the guide groove is slidably connected with the moving block. Two V-shaped grooves are respectively opened at the front and rear ends of the lower surface of the moving block. The top of the slider is rotatably connected with the rotating shaft, and the outer surface of the rotating shaft is slidably connected to the inner wall of the adjacent V-shaped groove. Clamping one end of the cable can better simulate the state of the cable in actual application.

[0013] Furthermore, the clamping mechanism also includes an electric push rod, which is arranged at the upper end of the front side of the shell, the telescopic end of the electric push rod is fixedly connected to the front side of the moving block, and the input end of the electric push rod is electrically connected to the output end of the single-chip microcomputer to drive the clamping mechanism.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The operation of the electric push rod is regulated by the single-chip microcomputer, and the telescopic end of the electric push rod pushes the moving block to move backward in the guide slot, thereby driving the rotating shaft at the top of the slider to slide and rotate in the V-shaped slot, thereby realizing the sliding avoidance of the slider inside the slot, and finally unfolding the two clamps to the outside, and then placing the cable in the two placement slots, and then the operation of the electric push rod is regulated by the single-chip microcomputer, and the telescopic end of the electric push rod pushes the moving block to move forward in the guide slot, thereby driving the rotating shaft at the top of the slider to slide and rotate in the V-shaped slot, thereby realizing the sliding avoidance of the slider inside the slot, and finally bringing the two clamps inward, so that the two clamps are in contact with the outer surface of the cable and squeezed and fixed. Clamping one end of the cable can better simulate the state of the cable in actual application, such as hanging or laying on the ground. This fixing method is closer to the real situation, which is helpful to evaluate the performance of the cable in the actual use environment, and at the same time can reduce the interference of external factors on the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model in right side section;

[0018] Figure 3 It is a partial structural schematic diagram of the clamping mechanism of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure enlarged at point A of the utility model.

[0020] In the figure: 1 temperature sensor, 2 test housing, 3 clamping mechanism, 31 electric push rod, 32 slider, 33 slide groove, 34 moving block, 35 V-shaped slide groove, 36 rotating shaft, 37 clamping plate, 38 guide slide groove, 39 placement groove, 4 temperature display, 5 single chip microcomputer, 6 sealing door, 7 handle, 8 perspective window, 9 exhaust pipe, 10 gas valve, 11 cable, 12 combustion box, 13 solid alcohol block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 ,This embodiment provides a technical solution: a cable fire resistance performance tester, including a housing 2, a combustion box 12 and a clamping mechanism 3;

[0023] Shell 2: The right side thereof is hinged with a sealing door 6, a handle 7 is fixedly connected to the bottom end of the right side of the sealing door 6, a perspective window 8 is arranged inside the sealing door 6, and the sealing door 6 is opened by the handle 7. The shell 2 also includes a single-chip microcomputer 5, which is arranged at the upper end of the front side of the shell 2, and the input end of the single-chip microcomputer 5 is electrically connected to the external power supply, and also includes a temperature display 4, which is arranged at the lower end of the front side of the shell 2, and the input end of the temperature display 4 is electrically connected to the output end of the single-chip microcomputer 5, and also includes a temperature sensor 1, which is arranged at the left end of the upper surface of the shell 2, and the detection probe of the temperature sensor 1 extends to the inside of the shell 2, and the temperature sensor 1 is bidirectionally electrically connected to the single-chip microcomputer 5. An exhaust pipe 9 is fixedly connected to the exhaust hole at the right end of the upper surface of the shell 2, and the exhaust pipe 9 is internally The wall is provided with an air valve 10, and the sealing door 6 is closed to observe the internal situation through the perspective window 8. At the same time, the temperature display 4 and the temperature sensor 1 are controlled by the single chip microcomputer 5 to operate. After reaching the target temperature, it is maintained for a period of time. After the temperature is detected by the temperature sensor 1, the value is transmitted to the single chip microcomputer 5. After integration and analysis by the single chip microcomputer 5, the recorded temperature data can be used to generate a chart or graph to be displayed on the temperature display 4 for visual analysis, which helps to more clearly observe and understand the temperature change trend of the sample, the extreme value at high temperature and other information, and can evaluate the fire resistance and safety of the cable 11 in flame contact and combustion, and determine whether the cable 11 meets the relevant safety standards and requirements. At the same time, the air valve 10 is opened to ensure the circulation of the air inside the shell 2;

[0024] The combustion box 12 is fixedly connected to the bottom wall of the housing 2. Evenly distributed solid alcohol blocks 13 are placed inside the combustion box 12, and then the solid alcohol blocks 13 are ignited by an external igniter;

[0025] The clamping mechanism 3 includes a slider 32, a slide groove 33, a clamping plate 37 and a placement groove 39. The slide grooves 33 are both provided at the left and right ends of the top wall of the housing 2. The inner walls of the slide grooves 33 are slidably connected with the sliders 32. The lower surfaces of the two longitudinally adjacent sliders 32 are fixedly connected to a clamping plate 37. The inner sides of the two clamping plates 37 are provided with placement grooves 39. The middle part of the two placement grooves 39 that constitute the whole is provided with a cable 11. The clamping mechanism 3 also includes a moving block 34, a V-shaped slide groove 35, a rotating shaft 36 and a guide slide groove 38. The guide slide groove 38 is provided on the outer The top wall of the shell 2 and the inner wall of the guide slot 38 are slidably connected with a moving block 34, and two V-shaped slots 35 are respectively provided at the front and rear ends of the lower surface of the moving block 34. The top of the slider 32 is rotatably connected with a rotating shaft 36, and the outer surface of the rotating shaft 36 is slidably connected with the inner wall of the adjacent V-shaped slot 35. The clamping mechanism 3 also includes an electric push rod 31, which is arranged at the upper end of the front side of the shell 2. The telescopic end of the electric push rod 31 is fixedly connected to the front side of the moving block 34, and the input end of the electric push rod 31 is electrically connected to the output end of the single-chip microcomputer 5. Then, the electric push rod 31 is regulated to operate through the single chip microcomputer 5, and the telescopic end of the electric push rod 31 pushes the moving block 34 to move backward in the guide slot 38, thereby driving the rotating shaft 36 at the top of the slider 32 to slide and rotate in the V-shaped slot 35, so that the slider 32 can slide and avoid inside the slot 33, and finally the two clamping plates 37 are unfolded outward, and then the cable 11 is placed in the two placement slots 39, and then the electric push rod 31 is regulated to operate through the single chip microcomputer 5, and the telescopic end of the electric push rod 31 pushes the moving block 34 to move forward in the guide slot 38 , thereby driving the rotating shaft 36 at the top of the slider 32 to slide and rotate in the V-shaped groove 35, thereby realizing the sliding avoidance of the slider 32 inside the groove 33, and finally moving the two clamping plates 37 inward, so that the two clamping plates 37 are in contact with the outer surface of the cable 11 and squeezed and fixed. Clamping one end of the cable can better simulate the state of the cable in actual application, such as hanging or laying on the ground. This fixing method is closer to the actual situation, which is helpful to evaluate the performance of the cable in the actual use environment, and at the same time can reduce the interference of external factors on the test.

[0026] The working principle of a cable fire resistance performance tester provided by the utility model is as follows: the sealing door 6 is opened by the handle 7, and then the operation of the electric push rod 31 is regulated by the single-chip microcomputer 5, and the telescopic end of the electric push rod 31 pushes the moving block 34 to move backward in the guide slide groove 38, thereby driving the rotating shaft 36 at the top of the slider 32 to slide and rotate in the V-shaped slide groove 35, thereby realizing the sliding avoidance of the slider 32 in the slide groove 33, and finally the two clamping plates 37 are unfolded outward, and then the cable 11 is placed in the two placement grooves 39, and then the operation of the electric push rod 31 is regulated by the single-chip microcomputer 5, and the telescopic end of the electric push rod 31 pushes the moving block 34 to move forward in the guide slide groove 38, thereby driving the rotating shaft 36 at the top of the slider 32 to slide and rotate in the V-shaped slide groove 35, thereby realizing the sliding avoidance of the slider 32 in the slide groove 33, and finally the two clamping plates 37 are brought inwardly, so that the two clamping plates 37 are in contact with the outer surface of the cable 11 and squeezed and fixed, and clamping one end of the cable can better simulate the actual cable The state in the application, such as hanging or laying on the ground, this fixing method is closer to the real situation, which is helpful to evaluate the performance of the cable in the actual use environment, and can reduce the interference of external factors on the test. Then, the solid alcohol block 13 is ignited by an external igniter, and the sealing door 6 is closed to observe the internal situation through the perspective window 8. At the same time, the temperature display 4 and the temperature sensor 1 are operated by the single-chip microcomputer 5. After reaching the target temperature, it is maintained for a period of time. After the temperature is detected by the temperature sensor 1, the value is conveyed to the single-chip microcomputer 5. After integration and analysis by the single-chip microcomputer 5, the recorded temperature data can be used to generate charts or graphics displayed on the temperature display 4 for visual analysis, which helps to more clearly observe and understand the temperature change trend of the sample, the extreme value at high temperature and other information, and can evaluate the fire resistance and safety of the cable 11 in flame contact and combustion, and determine whether the cable 11 meets the relevant safety standards and requirements. At the same time, the air valve 10 is opened to ensure the circulation of air inside the shell 2.

[0027] It is worth noting that the specific model of the single chip microcomputer 5 disclosed in the above embodiment is S7-200, the temperature sensor 1 can be DHlihua-PBS, the electric push rod 31 can be SM-38STG-1000N, and the single chip microcomputer 5 controls the temperature sensor 1, the electric push rod 31 and the temperature display 4 using the methods commonly used in the prior art.

[0028] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cable fire resistance tester, characterized in that: It comprises a housing (2), a combustion box (12) and a clamping mechanism (3); The housing (2) has a sealing door (6) hingedly connected to its right side by a hinge, a handle (7) is fixedly connected to the bottom end of the right side of the sealing door (6), and a perspective window (8) is provided inside the sealing door (6); A combustion box (12): fixedly connected to the bottom wall of the housing (2), wherein evenly distributed solid alcohol blocks (13) are placed inside the combustion box (12); The clamping mechanism (3) comprises a slider (32), a slide groove (33), a clamping plate (37) and a placement groove (39), wherein the slide grooves (33) are both provided at the left and right ends of the top wall of the housing (2), the inner wall of the slide groove (33) is slidably connected to the slider (32), the lower surfaces of two longitudinally adjacent sliders (32) are fixedly connected to a clamping plate (37), the inner side surfaces of the two clamping plates (37) are both provided with placement grooves (39), and a cable (11) is provided in the middle of the two placement grooves (39) constituting the whole.

2. A cable fire resistance tester according to claim 1, characterized in that: It also comprises a single-chip microcomputer (5), which is arranged at the upper end of the front side of the housing (2), and an input end of the single-chip microcomputer (5) is electrically connected to an external power supply.

3. A cable fire resistance tester according to claim 2, characterized in that: It also includes a temperature display (4), which is arranged at the lower end of the front side of the housing (2), and the input end of the temperature display (4) is electrically connected to the output end of the single-chip computer (5).

4. A cable fire resistance tester according to claim 3, characterized in that: It also comprises a temperature sensor (1), the temperature sensor (1) being arranged at the left end of the upper surface of the housing (2), the detection probe of the temperature sensor (1) extending into the interior of the housing (2), and the temperature sensor (1) being bidirectionally electrically connected to the single-chip computer (5).

5. A cable fire resistance tester according to claim 1, characterized in that: An exhaust pipe (9) is fixedly connected to the exhaust hole at the right end of the upper surface of the shell (2), and an air valve (10) is provided on the inner wall of the exhaust pipe (9).

6. A cable fire resistance tester according to claim 2, characterized in that: The clamping mechanism (3) further comprises a moving block (34), a V-shaped slide groove (35), a rotating shaft (36) and a guide slide groove (38), wherein the guide slide groove (38) is provided on the top wall of the housing (2), the inner wall of the guide slide groove (38) is slidably connected with the moving block (34), the front and rear ends of the lower surface of the moving block (34) are respectively provided with two V-shaped slide grooves (35), the top end of each of the sliding blocks (32) is rotatably connected with the rotating shaft (36), and the outer surface of each of the rotating shafts (36) is slidably connected with the inner wall of each of the adjacent V-shaped slide grooves (35).

7. A cable fire resistance tester according to claim 6, characterized in that: The clamping mechanism (3) further comprises an electric push rod (31), the electric push rod (31) being arranged at the upper end of the front side surface of the housing (2), the telescopic end of the electric push rod (31) being fixedly connected to the front side surface of the moving block (34), and the input end of the electric push rod (31) being electrically connected to the output end of the single chip computer (5).

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