Long sample optical fiber tensile strength testing equipment
By designing a long sample fiber tensile strength testing equipment including test tracks and tensile parts, the problems of poor test accuracy and unstable clamping in the prior art are solved, and high-precision, automated and safe fiber tensile strength testing is achieved.
Patent Information
- Application Number
- CN202421757021.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In the prior art, the poor test accuracy of general tensile machines and the unsolid clamping of the fixtures affect the test results of the optical fiber tensile strength.
A long sample fiber tensile strength testing equipment is designed, including the seat body and test pieces, and automated testing is carried out using test tracks and tensile parts to ensure that the fixed clamping at both ends of the fiber is firm.
It improves the accuracy and efficiency of fiber tensile strength testing, and can detect fiber defects at 40 times the length at the same time, approach practical application scenarios, and ensures high test safety and automation.
Smart Images
Figure CN223021756U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical fiber testing, in particular to a tensile strength testing device for long-sample optical fibers. Background Art
[0002] With the development of the national communication system, optical fibers have been widely used in domestic and foreign communication projects due to their many advantages such as low loss and strong anti-interference ability. Since the main component material of optical fibers is silica, it is easy for optical fibers to break after being bent or subjected to a large tension. The repair process of optical fiber breakage is very cumbersome and the repair cost is high. Therefore, optical fibers need to meet certain tensile strength requirements. Tensile strength is one of the mechanical property requirements of optical fibers. A certain stress or strain is applied to a section of sample optical fiber, and this stress or strain increases at a constant rate until the optical fiber breaks. The breaking force at the time of optical fiber breakage is recorded, and statistical distribution calculations are performed.
[0003] In "GB / T15972.31-2021 Optical Fiber Test Method Specifications Part 31: Measurement Methods and Test Procedures for Mechanical Properties Tensile Strength", two types of sample lengths for testing are recommended. One is the "short sample" with a length of about 0.5m, and the other is the "long sample" with a maximum length of about 20m. In the prior art, a general tensile testing machine is usually used to test the tensile strength of short-sample optical fibers. The two ends of the optical fiber sample are respectively fixed on the fixtures of the general tensile testing machine. By setting the moving rate of the fixtures of the general tensile testing machine through a computer, the optical fiber can be stretched along its length direction to apply tensile stress to the optical fiber sample until the optical fiber sample breaks. Finally, the computer records the force value at the break point, and thus calculates the tensile strength of the optical fiber. The existing general tensile testing machine can only reflect the mechanical characteristics and surface defects of optical fibers with a relatively small length. Therefore, it is necessary to test the optical fiber sample relatively more times. However, the testing of long samples can more fully reflect the mechanical characteristics of optical fibers and is closer to the actual use scenario. There is a situation where the optical fiber is not firmly fixed by the fixture and slides off, affecting the subsequent tensile test results. Summary of the Utility Model
[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects of poor testing accuracy of the general tensile testing machine and fixture clamping in the prior art, so as to provide a tensile strength testing device for long-sample optical fibers.
[0005] The above technical purpose of the utility model is achieved through the following technical solutions:
[0006] A tensile strength testing device for long-sample optical fibers, comprising a base body and a test piece. The test piece is arranged inside the base body. The base body includes a base, a protective member, and multiple pairs of support columns. The support columns are arranged in pairs below the base and are arrayed along the length direction of the base. The protective member includes a protective cover and a sliding cover. Both the protective cover and the sliding cover cover the base. One end of the sliding cover is arranged close to the protective cover and slides relative to the length direction of the protective cover. The test piece includes a test track and a tensile member. The test track is arranged along the length direction of the base and is oppositely arranged on both sides of the base. The tensile member slides along the length direction of the test track and is arranged on the test track.
[0007] By adopting the above technical solution, this device is suitable for the tensile strength test of 20m long samples. The operation is convenient and safe, and the automation degree of the test process is high. Compared with using a 0.5m short tensile testing machine for tensile strength testing, the fiber optic defects in a 40-fold length can be detected simultaneously in one test. The long-sample test is closer to the actual application scenario, the test is more accurate, and the test efficiency is effectively improved.
[0008] Furthermore, the protective cover includes multiple protective partition covers spliced in an array along the length direction of the base. Observation windows are opened on the front sides of the protective partition covers. The sliding cover includes two operation covers that slide relative to each other. Observation windows are also provided on the front sides of the operation covers, and operation handles are further provided at one end of the front sides close to each other. An operation track is arranged on the base body corresponding to the operation cover, and the operation track is arranged outside the protective partition cover.
[0009] By adopting the above technical solution, the observation window can observe the operation status of the internal device to ensure the normal operation of the internal device. The operation cover is used for the winding operation of the optical fiber. The operation track arranged outside does not affect the movement of the internal tensile member.
[0010] Furthermore, a fixing frame extends vertically upward on the base. The fixing frame is arranged outside the protective cover and in the middle of two opposite operation covers. A fiber optic disk is rotatably installed at the top of the fixing frame in a positioned manner. The axis of the fiber optic disk is arranged along the width direction of the base body. A placement groove is opened on the outer periphery of the fiber optic disk. A guide wheel with a parallel axis is further arranged below the fiber optic disk. The guide wheel is installed on the base and is located inside the protective cover.
[0011] By adopting the above technical solution, the fiber optic disk on the fixing frame is used for wire feeding operation. The wire fed from the fiber optic disk passes under the guide wheel and then winds around the tensile member, reducing the possibility of breakage during tensile wire feeding and affecting subsequent tests.
[0012] Furthermore, the stretching member includes a fixed member and a movable member arranged side by side horizontally. The fixed member includes a first sliding frame, two first pulleys and a first clamp. The first sliding frame is arranged along the width direction of the seat body. The first pulleys are oppositely arranged at both ends in the length direction of the first sliding frame and are positioned and rotatably installed on the first sliding frame. The first clamp is arranged in the middle of the length direction of the first sliding frame. The movable member includes a second sliding frame, two second pulleys and a second clamp. The second sliding frame is arranged along the width direction of the seat body. The second pulleys are oppositely arranged at both ends in the length direction of the second sliding frame and are positioned and rotatably installed on the second sliding frame. The second clamp is arranged in the middle of the length direction of the second sliding frame.
[0013] Furthermore, the first pulley and the second pulley are both slidably arranged on the test track and slide along the length direction of the test track. Each side of the test track includes an upper track and a lower track. A sliding gap is arranged between the upper track and the lower track. The first pulley and the second pulley are both clamped in the sliding gap.
[0014] By adopting the above technical solution, the optical fiber is payed off from the optical fiber reel, first clamped and wound on the first clamp and moves to the leftmost end of the whole device along with the first sliding frame, and then the other end of the optical fiber is wound on the second clamp. At this time, the whole optical fiber is in a straightened but unloaded state. Then, the operation cover is closed to control the movable member to automatically move to the right until the optical fiber is broken, and the stress data of the optical fiber breakage is automatically sensed and calculated.
[0015] Furthermore, the first clamp includes a first fastening seat and a first winding wheel. The first fastening seat is fixed in the middle of the first sliding frame. The first fastening seat is in a semi-circular arc shape and a first fastening groove is arranged in the middle. The first winding wheel is clamped in the first fastening groove. A first clamping groove is arranged on one side of the top of the first winding wheel, and a first clamping block is hinged on the first clamping groove. A first winding groove is also arranged in the middle of the outer periphery of the first winding wheel. A first guiding groove extends between the first winding groove and the first clamping groove. The second clamp includes a second fastening seat and a second winding wheel. The second fastening seat is fixed in the middle of the second sliding frame. The second fastening seat is in a semi-circular arc shape and a second fastening groove is arranged in the middle. The second winding wheel is clamped in the second fastening groove. A second clamping groove is arranged on one side of the top of the second winding wheel, and a second clamping block is hinged on the second clamping groove. A second winding groove is also arranged in the middle of the outer periphery of the second winding wheel. A second guiding groove extends between the second winding groove and the second clamping groove.
[0016] Further, at opposite ends of the top inside the first fastening groove, there are also first fastening cards. The first fastening cards are horizontally slidably arranged inside the first fastening groove and are connected to the first fastening groove through first telescopic springs. A first engaging disc is also covered on the first winding wheel, and the first engaging disc is fixed to the first fastening seat by bolts; at opposite ends of the top inside the second fastening groove, there are also second fastening cards. The second fastening cards are horizontally slidably arranged inside the second fastening groove and are connected to the second fastening groove through second telescopic springs. A second engaging disc is also covered on the second winding wheel, and the second engaging disc is fixed to the second fastening seat by bolts.
[0017] By adopting the above technical solution, the first fixture and the second fixture realize the fixed clamping of both ends of the optical fiber, ensuring firm fixation and avoiding affecting subsequent optical fiber testing; taking the first fixture as an example, first lead out one end of the optical fiber from the optical fiber reel, clamp it in the first clamping groove and close the first clamping block. The optical fiber enters the first winding groove along the first guiding groove and winds around the first winding wheel for multiple turns to realize the lateral limitation of the optical fiber. The length of the optical fiber wound on the first winding wheel is not less than 40 cm. Then, the first winding wheel is clamped into the first fastening groove, and the first fastening cards at both left and right ends are clamped on both sides below the center of the first winding wheel. Then install the first engaging disc to fix the first winding wheel, increasing the longitudinal limitation of the optical fiber. At this time, the optical fiber is introduced from the optical fiber reel, wound under the guiding wheel, and the other end is fixed above the first winding wheel. Similarly, after the first fixture moves to the left with the first sliding frame, fix the other end of the optical fiber with the same operation and straighten the optical fiber during the fixing process, being in a straightened but unloaded state, thereby realizing the clamping operation of both ends of the optical fiber.
[0018] Further, driving members are also arranged at both ends of the test track. The driving members include a fixed drive connected to the fixed member and an active drive connected to the active member. A fixed baffle is also arranged at one end of the test track close to the fixed drive; a first sensing device is also arranged on the fixed member, a second sensing device is arranged on the active member, and a control console is arranged beside the outer part of the seat body. The driving members, the first sensing device, and the second sensing device are all signal-controlled and connected to the control console.
[0019] By adopting the above technical solution, the fixed drive and the active drive are workpieces such as cylinders, hydraulic pumps, or linear motors that can drive the fixed member and the active member to perform linear motion; the first sensing device and the second sensing device include, but are not limited to, force sensors, speed sensors, and acceleration sensors. The data detected by the first sensing device and the second sensing device are transmitted to the control console, and the control console calculates the strain rate and stress value of the optical fiber through corresponding software.
[0020] In summary, the technical solution of the present utility model has the following advantages:
[0021] 1. The tensile strength testing equipment for long-sample optical fibers provided by the present utility model is provided with a testing track and a stretching member to achieve the purpose of automatically displacing and testing a 10m long-sample optical fiber. The overall testing length is long and the degree of automation in the testing process is high. The two ends of the optical fiber are firmly fixed to avoid lateral and longitudinal displacement and other situations.
[0022] 2. The tensile strength testing equipment for long-sample optical fibers provided by the present utility model adopts a closed metal shell design of a protective member during the tensile strength test to ensure the safety protection of the testing personnel when the optical fiber breaks under stress during the testing process and reduce the potential safety hazards caused by the breakage.
[0023] 3. The tensile strength testing equipment for long-sample optical fibers provided by the present utility model is provided with a first sensing device and a second sensing device to detect the force data and other data when the optical fiber breaks and transmit the detected data to a console. The console calculates the strain rate and stress value of the optical fiber through corresponding software, realizing automatic sensing and calculation, and having high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0025] Figure 1 It is a schematic diagram of the overall structure of a tensile strength testing equipment for long-sample optical fibers provided in an embodiment of the present utility model;
[0026] Figure 2 It is a schematic diagram of a partial structure of a seat body provided in an embodiment of the present utility model;
[0027] Figure 3 It is an exploded structure diagram of a stretching member provided in an embodiment of the present utility model;
[0028] Figure 4 It is a cross-sectional structure diagram of a stretching member provided in an embodiment of the present utility model.
[0029] DESCRIPTION OF THE REFERENCE NUMERALS:
[0030] 1. Seat body; 2. Base; 21. Fixed frame; 22. Optical fiber disk; 221. Placing groove; 23. Guide wheel; 24. Operation track; 3. Protective part; 31. Protective cover; 311. Protective partition cover; 32. Sliding cover; 321. Operation cover; 33. Observation window; 34. Operation handle; 4. Support column; 5. Test piece; 6. Test track; 61. Upper track; 62. Lower track; 63. Sliding gap; 64. Fixed baffle; 7. Tensile part; 8. Fixing part; 81. First sliding frame; 82. First pulley; 83. First fixture; 831. First buckling seat; 8311. First buckling groove; 8312. First buckling card; 8313. First telescopic spring; 832. First winding wheel; 8321. First clamping groove; 8322. First clamping block; 8323. First winding groove; 8324. First guiding groove; 833. First engaging disk; 84. First sensing device; 9. Movable part; 91. Second sliding frame; 92. Second pulley; 93. Second fixture; 931. Second buckling seat; 9311. Second buckling groove; 9312. Second buckling card; 9313. Second telescopic spring; 932. Second winding wheel; 9321. Second clamping groove; 9322. Second clamping block; 9323. Second winding groove; 9324. Second guiding groove; 933. Second engaging disk; 94. Second sensing device; 10. Driving part; 101. Fixed drive; 102. Movable drive; 11. Control console. Detailed implementation manners
[0031] The following further describes the present utility model in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0032] A tensile strength testing device for long-sample optical fibers, as Figure 1 and Figure 2 shown, includes a seat body 1 and a test piece 5. The test piece 5 is arranged inside the seat body 1. The seat body 1 includes a base 2, a protective part 3 and multiple pairs of support columns 4. The support columns 4 are arranged in pairs under the base 2 and are arrayed along the length direction of the base 2. The protective part 3 includes a protective cover 31 and a sliding cover 32. Both the protective cover 31 and the sliding cover 32 cover the base 2. One end of the sliding cover 32 close to the protective cover 31 is arranged and slides relative to the length direction of the protective cover 31. The test piece 5 includes a test track 6 and a tensile part 7. The test track 6 is arranged along the length direction of the base 2 and is oppositely arranged on the front and rear sides of the base 2. The tensile part 7 is slidably arranged on the test track 6 along the length direction of the test track 6. This device is suitable for the tensile strength test of 20m long samples, with convenient and safe operation and high automation in the test process. Compared with the tensile strength test using a 0.5m short tensile machine, the fiber defects in a 40-fold length can be detected simultaneously in one test. The long-sample test is close to the actual application scenario, the test is more accurate and the test efficiency is effectively improved.
[0033] As shown Figure 1 and Figure 2 in the figure, the protective cover 31 includes a plurality of protective partitions 311 spliced in an array along the length direction of the base 2. Observation windows 33 are provided on the front sides of the protective partitions 311. The observation windows 33 are made of transparent materials and can observe the internal situation. The sliding cover 32 is arranged on the base 2 near the right end. The sliding cover 32 includes two operation covers 321 that slide relative to each other. Observation windows 33 are also provided on the front sides of the operation covers 321, and operation handles 34 are further provided at one end of the front sides close to each other. Operation tracks 24 corresponding to the operation covers 321 are arranged on the seat body 1. The operation tracks 24 are arranged outside the protective partitions 311. The observation window can observe the operation status of the internal device to ensure the normal operation of the internal device. The operation cover 321 is used for the winding operation of the optical fiber. The operation track 24 arranged outside the base 2 does not affect the movement of the internal tension member 7. The total length of the front-segment multiple protective partitions 311 and the length of the left operation cover 321 are not less than 19300 cm.
[0034] As shown Figure 2 in the figure, a fixing frame 21 also extends vertically upward at the rear side of the base 2. The fixing frame 21 is arranged outside the protective cover 31 and in the middle of two opposite operation covers 321. A fiber optic disc 22 is rotatably mounted at the top of the fixing frame 21 in a positioned manner. The axis of the fiber optic disc 22 is arranged along the width direction of the base 2. A placement groove 221 is provided on the outer periphery of the fiber optic disc 22. A guide wheel 23 with a parallel axis is further provided below the fiber optic disc 22. The guide wheel 23 is mounted on the base 2 and is located inside the protective cover 31. The guide wheel 23 is mounted on a bracket. The bracket is arranged along the width direction of the base 2, and both ends of the bottom are located inside the two test tracks 6. The fiber optic disc 22 on the fixing frame 21 is used for the wire releasing operation. The wire released from the fiber optic disc 22 passes under the guide wheel 23 and then winds around the tension member 7, reducing the possibility of breakage during the stretching and wire releasing process, which may affect subsequent tests.
[0035] As shown Figure 1 , Figure 3 and Figure 4 in the figure, the tension member 7 includes a fixed member 8 and a movable member 9 arranged side by side horizontally. The fixed member 8 and the movable member 9 have the same structure but move in opposite directions. After fixing the optical fiber, the fixed member 8 moves to the left, and after fixing the optical fiber, the movable member 9 moves to the right. When moving to the right, the speed is 2000 mm / min.
[0036] The fixing member 8 includes a first sliding frame 81, two first pulleys 82 and a first clamp 83. The first sliding frame 81 is arranged along the width direction of the seat body 1. The first pulleys 82 are oppositely arranged at both ends in the length direction of the first sliding frame 81 and are rotatably mounted on the first sliding frame 81 in a positioned manner. The first clamp 83 is arranged in the middle of the length direction of the first sliding frame 81. The first clamp 83 includes a first buckling seat 831 and a first wire winding wheel 832. The first buckling seat 831 is fixed in the middle of the first sliding frame 81. The first buckling seat 831 is in a semi-circular arc shape and has a first buckling groove 8311 opened in the middle. The first wire winding wheel 832 is snap-fitted in the first buckling groove 8311. A first clamping groove 8321 is opened on one side of the top of the first wire winding wheel 832, and a first clamping block 8322 is hinged on the first clamping groove 8321. A first wire winding groove 8323 is also opened in the middle of the outer circumference of the first wire winding wheel 832. A first guiding groove 8324 extends between the first wire winding groove 8323 and the first clamping groove 8321. Opposite ends of the inner top of the first buckling groove 8311 are also provided with first buckling cards 8312. The first buckling cards 8312 are horizontally slidably arranged in the first buckling groove 8311 and are connected to the first buckling groove 8311 through a first telescopic spring 8313. A first engaging disc 833 is also sleeved on the first wire winding wheel 832, and the first engaging disc 833 is fixed to the first buckling seat 831 by bolts.
[0037] The movable member 9 includes a second sliding frame 91, two second pulleys 92 and a second clamp 93. The second sliding frame 91 is arranged along the width direction of the seat body 1. The second pulleys 92 are oppositely arranged at both ends in the length direction of the second sliding frame 91 and are rotatably mounted on the second sliding frame 91 in a positioned manner. The second clamp 93 is arranged in the middle of the length direction of the second sliding frame 91. The second clamp 93 includes a second buckling seat 931 and a second wire winding wheel 932. The second buckling seat 931 is fixed in the middle of the second sliding frame 91. The second buckling seat 931 is in a semi-circular arc shape and has a second buckling groove 9311 opened in the middle. The second wire winding wheel 932 is snap-fitted in the second buckling groove 9311. A second clamping groove 9321 is opened on one side of the top of the second wire winding wheel 932, and a second clamping block 9322 is hinged on the second clamping groove 9321. A second wire winding groove 9323 is also opened in the middle of the outer circumference of the second wire winding wheel 932. A second guiding groove 9324 extends between the second wire winding groove 9323 and the second clamping groove 9321. Opposite ends of the inner top of the second buckling groove 9311 are also provided with second buckling cards 9312. The second buckling cards 9312 are horizontally slidably arranged in the second buckling groove 9311 and are connected to the second buckling groove 9311 through a second telescopic spring 9313. A second engaging disc 933 is also sleeved on the second wire winding wheel 932, and the second engaging disc 933 is fixed to the second buckling seat 931 by bolts.
[0038] The first pulley 82 and the second pulley 92 are both slidably arranged on the test track 6 and are slidably arranged along the length direction of the test track 6. Each side of the test track 6 includes an upper track 61 and a lower track 62. A sliding gap 63 is provided between the upper track 61 and the lower track 62. The first pulley 82 and the second pulley 92 are both clamped and arranged in the sliding gap 63.
[0039] Taking the first fixture 83 as an example, first lead out one end of the optical fiber from the optical fiber reel 22, clamp it in the first clamping groove 8321, and close the first clamping block 8322. The optical fiber enters the first winding groove 8323 along the first guiding groove 8324 and winds around the first winding wheel 832 for multiple turns to realize the lateral limitation of the optical fiber. The length of the optical fiber wound around the first winding wheel 832 is not less than 40 cm. Then, snap the first winding wheel 832 into the first fastening groove 8311. The first fastening clips 8312 at the left and right ends are snapped on both sides below the center of the first winding wheel 832. Then install the first engaging disc 833 to fix the first winding wheel 832 and increase the longitudinal limitation of the optical fiber. At this time, the optical fiber is introduced from the optical fiber reel 22, wound under the guiding wheel 23, and the other end is fixed above the first winding wheel 832. Similarly, after the first fixture 83 moves to the left with the first sliding frame 81, fix the other end of the optical fiber with the same operation and straighten the optical fiber during the fixing process, so that the optical fiber is in a straightened but unloaded state, thereby realizing the clamping operation of both ends of the optical fiber.
[0040] As Figure 1 、 Figure 3 and Figure 4 As shown in, a driving member 10 is further provided on the tensile member 7. The driving member 10 includes a fixed driver 101 connected to the fixed member 8 and a movable driver 102 connected to the movable member 9. A fixed baffle 64 is further provided at one end of the test track 6 close to the fixed driver 101. The fixed driver 101 and the movable driver 102 are workpieces such as cylinders, hydraulic pumps or linear motors that can drive the fixed member 8 and the movable member 9 to perform linear motion. After the fixed member 8 moves to the left end and touches the fixed baffle 64, it stops moving. At this time, disassemble the optical fiber on the optical fiber reel 22 and wind it on the movable member 9.
[0041] As Figure 1 As shown in, a first sensing device 84 is further provided on the fixed member 8, a second sensing device 94 is provided on the movable member 9, and a control console 11 is provided beside the seat body 1. The driving member 10, the first sensing device 84 and the second sensing device 94 are all signal-controlled and connected to the control console 11. The first sensing device 84 and the second sensing device 94 include, but are not limited to, force sensors, speed sensors and acceleration sensors. The data detected by the first sensing device 84 and the second sensing device 94 are transmitted to the control console 11, and the control console 11 calculates the strain rate and stress value of the optical fiber through the corresponding software.
[0042] Working principle and usage method of the tensile strength testing equipment for long sample optical fibers: The optical fiber is payed off from the optical fiber reel 22 and first clamped and wound around the first fixture 83 and moves to the leftmost end of the base 2 along with the first sliding frame 81 until it abuts against the fixed baffle 64. Then, the other end of the optical fiber is wound around the second fixture 93. At this time, the whole optical fiber is in a straightened but unloaded state. After that, the operation cover 321 is closed to control the movable part 9 to automatically move to the right until the optical fiber is broken. The first sensing device 84 and the second sensing device 94 automatically sense and calculate the force data at the moment of optical fiber breakage and transmit it to the console 11. Finally, the strain rate and stress value of the optical fiber are calculated.
[0043] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the skills or knowledge in related fields. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.
Claims
1. A long sample optical fiber tensile strength test device, characterized in that: The invention comprises a base (1) and a test piece (5), wherein the test piece (5) is arranged in the base (1), the base (1) comprises a base (2), a protective piece (3) and a plurality of pairs of support columns (4), wherein the support columns (4) are arranged in pairs below the base (2) and arranged in an array along the length direction of the base (2), the protective piece (3) comprises a protective cover (31) and a sliding cover (32), wherein the protective cover (31) and the sliding cover (32) are both covered on the base (2), the sliding cover (32) is arranged close to one end of the protective cover (31) and slides relative to the protective cover (31) in the length direction, the test piece (5) comprises a test track (6) and a stretching piece (7), wherein the test track (6) is arranged along the length direction of the base (2) and is relatively arranged on two sides of the base (2), and the stretching piece (7) is slidably arranged on the test track (6) along the length direction of the test track (6).
2. The long sample optical fiber tensile strength testing device according to claim 1, characterized in that: The protective cover (31) comprises a plurality of protective shields (311) arranged in an array along the length direction of the base (2); the front side surfaces of the protective shields (311) are provided with observation windows (33); the sliding cover (32) comprises two operating shields (321) arranged to slide relative to each other; the front side surfaces of the operating shields (321) are also provided with observation windows (33) and one end of the front side surfaces close to each other is also provided with an operating handle (34); an operating track (24) is provided on the base (2) corresponding to the operating shield (321); and the operating track (24) is provided on the outside of the protective shield (311).
3. The long sample optical fiber tensile strength testing device according to claim 2, characterized in that: A fixing frame (21) is also vertically extended upwards on the base (2), and the fixing frame (21) is arranged outside the protective cover (31) and in the middle of two opposite operating covers (321). An optical fiber disc (22) is rotatably mounted on the top of the fixing frame (21), and the axis of the optical fiber disc (22) is arranged along the width direction of the base body (1). A placement groove (221) is provided on the outer periphery of the optical fiber disc (22). A guide wheel (23) with a parallel axis is also arranged below the optical fiber disc (22), and the guide wheel (23) is mounted on the base (2) and is located in the protective cover (31).
4. The long sample optical fiber tensile strength testing device according to claim 1, characterized in that: The stretching member (7) comprises a fixed member (8) and a movable member (9) which are arranged in parallel in the transverse direction. The fixed member (8) comprises a first sliding frame (81), two first pulleys (82) and a first clamp (83). The first sliding frame (81) is arranged along the width direction of the seat body (1). The first pulleys (82) are arranged at two ends of the first sliding frame (81) in a relative manner in a length direction and are mounted on the first sliding frame (81) in a positional and rotatable manner. The first clamp (83) is arranged in the middle of the first sliding frame (81) in the length direction. The movable member (9) comprises a second sliding frame (91), two second pulleys (92) and a second clamp (93). The second sliding frame (91) is arranged along the width direction of the seat body (1). The second pulleys (92) are arranged at two ends of the second sliding frame (91) in a relative manner in a length direction and are mounted on the second sliding frame (91) in a positional and rotatable manner. The second clamp (93) is arranged in the middle of the second sliding frame (91) in the length direction.
5. The long sample optical fiber tensile strength testing device according to claim 4, characterized in that: The first pulley (82) and the second pulley (92) are both slidably arranged on the test track (6) and slidably arranged along the length direction of the test track (6); the test track (6) on each side comprises an upper track (61) and a lower track (62); a sliding gap (63) is arranged between the upper track (61) and the lower track (62); and the first pulley (82) and the second pulley (92) are both clamped and arranged in the sliding gap (63).
6. The long sample optical fiber tensile strength testing device according to claim 5, characterized in that: The first clamp (83) comprises a first snap-fit seat (831) and a first winding wheel (832), the first snap-fit seat (831) being fixed to the middle of the first sliding frame (81), the first snap-fit seat (831) being semicircular and having a first snap-fit groove (8311) in the middle, the first winding wheel (832) being snap-fitted in the first snap-fit groove (8311), a first snap-fit groove (8321) being provided on one side of the top of the first winding wheel (832) and a first snap-fit block (8322) being hingedly provided on the first snap-fit groove (8321), a first winding groove (8323) being further provided in the middle of the outer circumference of the first winding wheel (832), and a first guide groove (8324) extending between the first winding groove (8323) and the first snap-fit groove (8321); The second clamp (93) comprises a second snap-fit seat (931) and a second winding wheel (932), wherein the second snap-fit seat (931) is fixed to the middle part of the second sliding frame (91), the second snap-fit seat (931) is semicircular and has a second snap-fit groove (9311) in the middle part, the second winding wheel (932) is snap-fitted in the second snap-fit groove (9311), a second snap-fit groove (9321) is provided on one side of the top of the second winding wheel (932), and a second snap-fit block (9322) is hingedly provided on the second snap-fit groove (9321), a second winding groove (9323) is further provided in the middle part of the outer circumference of the second winding wheel (932), and a second guide groove (9324) extends between the second winding groove (9323) and the second snap-fit groove (9321).
7. The long sample optical fiber tensile strength testing device according to claim 6, characterized in that: The first buckling groove (8311) is provided with first buckling cards (8312) at two opposite ends of the top. The first buckling card (8312) is slidably disposed in the first buckling groove (8311) and is connected to the first buckling groove (8311) via a first telescopic spring (8313). The first winding wheel (832) is also covered with a first buckling disk (833). The first buckling disk (833) is fixed to the first buckling seat (831) via bolts. Second snap-fit cards (9312) are also provided at two opposite ends of the top of the second snap-fit groove (9311); the second snap-fit card (9312) is laterally slidably arranged in the second snap-fit groove (9311) and is connected to the second snap-fit groove (9311) via a second telescopic spring (9313); a second snap-fit disk (933) is also covered on the second winding wheel (932); the second snap-fit disk (933) is fixed to the second snap-fit seat (931) via bolts.
8. The long sample optical fiber tensile strength testing device according to claim 7, characterized in that: A driving member (10) is also provided at both ends of the test track (6), and the driving member (10) includes a fixed driving member (101) connected to the fixed member (8) and a movable driving member (102) connected to the movable member (9). A fixed baffle (64) is also provided at one end of the test track (6) close to the fixed driving member (101); a first sensor device (84) is also provided on the fixed member (8), and a second sensor device (94) is provided on the movable member (9). A control console (11) is provided on the outside of the base (1), and the driving member (10), the first sensor device (84) and the second sensor device (94) are all connected to the control console (11) for signal control.