Cable tensile strength testing equipment

Abstract

The invention discloses cable tensile strength testing equipment which comprises a testing table, the upper end of the testing table is fixedly connected with a supporting frame, the testing table is fixedly connected with a plurality of mounting blocks, the adjacent sides of the plurality of mounting blocks are jointly and rotationally connected with rotating rods, the two rotating rods are fixedly connected with reels, and the reels are fixedly connected with the supporting frame. A pulling assembly is jointly arranged on the two mounting blocks located on the rear side, a rectangular opening is formed in the testing table, a detection adjusting assembly is arranged at the lower end of the supporting frame, and the detection adjusting assembly comprises two fixing blocks arranged at the top in the supporting frame. When the test equipment is used for testing a cable, the cable can be bent into different angles and then pulled, so that the tensile performance of the cable under the condition of different bending angles can be tested, and the tensile performance under different environment temperatures can be tested through the arrangement of a temperature adjusting assembly; therefore, the tensile property of the cable can be better mastered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable detection, and particularly relates to a cable tensile strength testing device. BACKGROUND

[0002] Wire and cable are wire products used to transmit electric energy, information and realize electromagnetic energy conversion. Broadly speaking, wire and cable is also referred to as cable, and narrowly speaking, cable is defined as: a collection of the following parts; one or more insulated cores, and their respective possible cladding layers, total protective layers and outer protective layers, and cables can also have additional conductors without insulation.

[0003] Before the cable is shipped, sampling detection needs to be performed on the cable, and in the detection, testing the tensile strength of the cable is also an important link. However, the existing cable tensile strength detection is mostly to directly pull the cable transversely or to pull the cable at a fixed clamping angle formed at two ends of the cable. However, due to the installation of the cable in actual application, the cable may be bent into different angles due to external force, so that the cable is pulled at different angles. Therefore, the existing tensile strength testing device cannot test the tensile strength of the cable at different bending angles. This method can only roughly detect the tensile performance of the cable, and the detection effect is not ideal. Moreover, due to the influence of the environment on the installed cable, the surface tension of the cable changes at low temperature, normal temperature or high temperature weather, so that the tensile strength of the cable is different at different temperatures. The existing testing device mostly detects at normal temperature, so that the detection result is not comprehensive. Therefore, a cable tensile strength testing device needs to be designed to solve the above problems. SUMMARY

[0004] The present application relates to the technical field of cable detection, and particularly relates to a cable tensile strength testing device.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: A kind of cable tensile strength test equipment, including test table, the upper end of the test table is fixedly connected with support frame, the test table is fixedly connected with multiple installation blocks, the adjacent side of multiple installation blocks is rotatably connected with rotating rod, two rotating rods are fixedly connected with winding wheel, two installation blocks located in rear side are equipped with pulling assembly, the test table is equipped with rectangular mouth, the lower end of the support frame is equipped with detection adjusting assembly, the detection adjusting assembly includes two fixed blocks arranged in the top of support frame, the adjacent side of two fixed blocks is fixedly connected with adjusting box, the inner top of adjusting box is rotatably connected with threaded rod, the threaded rod is threadedly connected with adjusting block, the lower end of adjusting block is equipped with recess, the front and rear two sides of recess inner wall are rotatably connected with lower pressing hollow roller.

[0006] Preferably, the pulling assembly includes strip-shaped box arranged on two installation blocks, the adjacent side of two strip-shaped boxes is fixedly connected with pneumatic rod, the telescopic end of two pneumatic rods is fixedly connected with second sliding block, the opposite side of two second sliding blocks is fixedly connected with two guide telescopic rods, the telescopic end of two matched guide telescopic rods is fixedly connected with first sliding block, the adjacent side of two first sliding blocks and corresponding second sliding blocks is elastically connected by spring, the rear side of two rotating rods extends into strip-shaped box and is equipped with first gear, the opposite side of two first sliding blocks is fixedly connected with first rack, first one-way bearing is arranged between first gear and rotating rod.

[0007] Preferably, the transmission rod is rotatably connected on the strip-shaped box located on left side, the third gear is arranged on the transmission rod, the third rack matched with third gear is fixedly connected on the second sliding block located on left side, the rear inner wall of support frame is rotatably connected with cross bar, the cross bar and transmission rod are drivingly connected by transmission assembly, the upper end of threaded rod extends to outside, the bevel gears matched with each other are arranged on cross bar and threaded rod.

[0008] Preferably, the front side of adjusting block is equipped with rotary joint, the rear side of rotary joint is communicated with lower pressing hollow roller, the rear side of lower pressing hollow roller is communicated with outside, the upper end of support frame is equipped with fan, the air outlet end of fan is communicated with the front side of rotary joint by hose, the upper end of support frame is equipped with temperature regulating box, the transition cavity is arranged in temperature regulating box, the rear side of transition cavity is communicated with the air inlet end of fan, temperature regulating assembly is arranged in temperature regulating box.

[0009] Preferably, the temperature regulating assembly includes air inlet cavity arranged in temperature regulating box, the front side of air inlet cavity is communicated with outside by air inlet, air inlet cavity and transition cavity are communicated by multiple air inlet channels, electric heating plate is arranged in the air inlet channel located on front side, refrigeration sheet is embedded on the rear inner wall of air inlet channel located on rear side, the heating end of refrigeration sheet extends to outside.

[0010] Preferably, the front side inner wall of the air inlet cavity is connected with a short rod, the left side of the short rod is fixedly connected with a rotating disc, a round opening is arranged on the rotating disc, the front side of the temperature adjusting box is fixedly connected with a control box, the front side of the short rod extends into the control box and is fixedly connected with a second gear, the right side inner wall of the control box is fixedly connected with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a moving block, and the left side of the moving block is fixedly connected with a second gear rack engaged with the second gear.

[0011] Preferably, the rear side of the adjusting block is provided with a strip-shaped groove, and the rear side inner wall of the adjusting box is fixedly connected with a trigger block, and the upper and lower sides of the trigger block are both provided with a pressure sensor.

[0012] Preferably, the transmission assembly comprises sprockets arranged on the transmission rod and the cross rod, and the two sprockets are connected through a chain transmission.

[0013] The present application has the following advantages: 1. Compared with the prior art, by arranging the adjusting assembly and the pulling assembly, after each test is completed in the test process, the adjusting block is lowered, so that the bending angle of the cable is increased, and after the cable is bent into different angles, the tensile test is carried out, so that the tensile performance of the cable can be better tested. 2. Compared with the prior art, by arranging the pneumatic rod and the guide telescopic rod, when the cable is pulled, the third gear rack can be moved, and after the pulling is completed, the third gear rack is reset to automatically drive the transmission rod to rotate, so that the adjusting block is lowered, and only one power source is needed to complete the tensile strength test and angle adjustment, thereby reducing the use of energy. 3. Compared with the prior art, by arranging the temperature adjusting assembly, in the test process, the temperature of the surface of the hollow roller can be adjusted, the temperature of the bending part of the cable is adjusted, the cable is tested in the environment of normal temperature, high temperature and low temperature, and the tensile performance of the cable in different environments can be further tested. 4. Compared with the prior art, by arranging four air inlet channels, the electric heating plate and the refrigerating fin are arranged in the left and right air inlet channels respectively, during the test, the temperature environment of the cable is changed from normal temperature to high temperature, to normal temperature and to low temperature, so that the sudden change of temperature does not affect the performance of the cable, and the accuracy of the cable performance test is ensured.

[0014] 5. Compared with existing technologies, by setting two pressure sensors, the turntable will be automatically rotated 90 degrees after each adjustment block moves up or down to the limit position, thereby automatically switching the air intake channel. This allows the tensile performance of the cable under different bending angles in different environments to be tested without moving the cable during testing.

[0015] In summary, this invention enables tensile testing of cables at different bending angles, resulting in a more comprehensive testing structure. Furthermore, it allows for testing the tensile strength of the same cable in different environments without transferring the cable, enabling testers to better understand cable performance and ensuring that only qualified cables enter the market. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a cable tensile strength testing device proposed in this invention; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 for Figure 1 A magnified view of a portion of the image; Figure 4 This is a schematic diagram of the internal structure of the bar-shaped box located on the left. Figure 5 This is a half-sectional view of the front side of the temperature control chamber; Figure 6 This is a half-sectional view of the left side of the temperature control chamber; Figure 7 This is a schematic diagram of the internal structure of the adjustment component.

[0017] In the diagram: 1 Test stand, 2 Mounting block, 3 Winding wheel, 4 Rotating rod, 5 Strip box, 6 Transmission assembly, 7 Transmission rod, 8 Support frame, 9 Fixing block, 10 Adjusting box, 11 Adjusting block, 12 Downward pressure hollow roller, 13 Rotary joint, 14 Hose, 15 First gear, 16 First rack, 17 First slider, 18 Pneumatic rod, 19 Second slider, 20 Bevel gear, 21 Crossbar, 22 Fan, 23 Temperature control box, 24 Air inlet, 25 Control box, 26 Electric telescopic rod, 27 Moving block, 28 Short rod, 29 Second gear, 30 Second rack, 31 Third gear, 32 Guide telescopic rod, 33 Spring, 34 Stop block, 35 Air inlet channel, 36 Heating plate, 37 Cooling element, 38 Strip groove, 39 Pressure sensor, 40 Transition chamber, 41 Air inlet chamber, 42 Turntable, 43 Round opening. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] ReferenceFigures 1-7 The utility model provides a kind of cable tensile strength test equipment, including test table 1, the upper end of test table 1 is fixedly connected with support frame 8, test table 1 is fixedly connected with multiple mounting blocks 2, the adjacent side of multiple mounting blocks 2 is commonly rotatably connected with rotating rod 4, two rotating rods 4 are all fixedly connected with winding wheel 3, two mounting blocks 2 located in rear side are commonly equipped with pulling assembly, test table 1 is equipped with rectangle mouth, the lower end of support frame 8 is equipped with detection adjusting assembly, detection adjusting assembly includes the two fixed blocks 9 being set in the top of support frame 8, the adjacent side of two fixed blocks 9 is commonly fixedly connected with adjusting box 10, the inner top of adjusting box 10 is rotatably connected with threaded rod, the thread layer on threaded rod is reciprocating thread layer, threaded rod is threadedly connected with adjusting block 11, the lower end of adjusting block 11 is equipped with recess, the front and rear two side inner walls of recess are commonly rotatably connected with lower pressure hollow roller 12, lower pressure hollow roller 12 is made of iron material.

[0020] Wherein, pulling assembly includes the strip-shaped box 5 being set in two mounting blocks 2, the adjacent side inner wall of two strip-shaped boxes 5 is all fixedly connected with pneumatic rod 18, the telescopic end of two pneumatic rods 18 is all fixedly connected with second sliding block 19, the opposite side of two second sliding blocks 19 is all fixedly connected with two guide telescopic rods 32, the telescopic end of two guide telescopic rods 32 of cooperation is commonly fixedly connected with first sliding block 17, two first sliding blocks 17 and corresponding second sliding block 19 adjacent side are elastically connected by spring 33, the rear side of two rotating rods 4 is all extended to strip-shaped box 5 and is equipped with first gear 15, the opposite side of two first sliding blocks 17 is all fixedly connected with first rack 16, first gear 15 is equipped with first one-way bearing between rotating rod 4, because the characteristic that one-way bearing rotates in one direction, locks in another direction, so that first gear 15 and rotating rod 4 located in left side can synchronously rotate counterclockwise, when rotating rod 4 rotates clockwise, first gear 15 does not rotate at this time, first gear 15 and rotating rod 4 located in right side can synchronously rotate clockwise, when rotating rod 4 rotates counterclockwise, first gear 15 does not rotate at this time.

[0021] Wherein, the transmission rod 7 is rotatably connected on the strip-shaped box 5 located in left side, the third gear 31 is equipped on transmission rod 7, second one-way bearing is equipped between transmission rod 7 and third gear 31, so that when third rack moves right, third gear 31 does not drive transmission rod 7 to rotate, when third rack moves left, third gear 31 drives transmission rod 7 to rotate at this time, third rack that is fixedly connected on second sliding block 19 located in left side is matched with third gear 31, the rear side inner wall of support frame 8 is rotatably connected with cross bar 21, cross bar 21 is drivenly connected with transmission rod 7 through transmission assembly 6, transmission assembly 6 includes the sprocket being set in transmission rod 7 and cross bar 21, two sprockets are drivenly connected through chain, the upper end of threaded rod extends to outside, the bevel gear 20 that is all intermeshed on cross bar 21 and threaded rod.

[0022] Wherein, the front side of the adjusting block 11 is provided with a rotary joint 13, the rear side of the rotary joint 13 is communicated with the lower pressing hollow roller 12, the rear side of the lower pressing hollow roller 12 is communicated with the outside, the upper end of the support frame 8 is provided with a fan 22, the air outlet end of the fan 22 is communicated with the front side of the rotary joint 13 through a hose 14, the upper end of the support frame 8 is provided with a temperature adjusting box 23, the temperature adjusting box 23 is provided with a transition cavity 40, the rear side of the transition cavity 40 is communicated with the air inlet end of the fan 22, the temperature adjusting box 23 is provided with a temperature adjusting assembly, the temperature adjusting assembly comprises an air inlet cavity 41 arranged in the temperature adjusting box 23, the front side of the air inlet cavity 41 is communicated with the outside through an air inlet 24, the air inlet cavity 41 is communicated with the transition cavity 40 through a plurality of air inlet channels 35, the air inlet channel 35 located at the front side is provided with an electric heating plate 36, the rear side inner wall of the air inlet channel 35 located at the rear side is embedded with a refrigeration fin 37, and the heating end of the refrigeration fin 37 extends to the outside, so that the refrigeration fin 37 can work normally.

[0023] Wherein, the front side inner wall of the air inlet cavity 41 is jointly connected with a short rod 28, the left side of the short rod 28 is fixedly connected with a rotating disc 42, the rotating disc 42 is provided with a round port 43, the front side of the temperature adjusting box 23 is fixedly connected with a control box 25, the front side of the short rod 28 extends into the control box 25 and is fixedly connected with a second gear 29, the right side inner wall of the control box 25 is fixedly connected with an electric telescopic rod 26, the telescopic end of the electric telescopic rod 26 is fixedly connected with a moving block 27, the left side of the moving block 27 is fixedly connected with a second rack 30 engaged with the second gear 29, the rear side of the adjusting block 11 is provided with a strip-shaped groove 38, the rear side inner wall of the adjusting box 10 is fixedly connected with a trigger block, the upper and lower sides of the trigger block are both provided with a pressure sensor 39, and the test table 1 is provided with a controller, when the pressure sensor 39 generates an electric signal and transmits to the controller each time, the controller will control the electric telescopic rod 26 to shrink by a set distance, so that the short rod 28 drives the rotating disc 42 to rotate by ninety degrees, and after the adjusting block 11 moves up and down twice, the staff can control the electric telescopic rod 26 to stretch to the initial length at this time, and the test of the cable is completed.

[0024] The function principle of the present application can be described as follows: when the cable is tested, the two ends of the cable are fixed on the two winding wheels 3, then the cable is wound on the winding wheels 3, so that the cable between the two winding wheels 3 is straightened, at this time the staff controls the two pneumatic rods 18 to shrink, the two second sliding blocks 19 relatively move, so that the plurality of guide telescopic rods 32 and springs 33 stretch, so that the two first sliding blocks 17 and first racks 16 have a relative motion trend, so that the two rotating rods 4 have a rotating trend through the two first gears 15, so that the cable is pulled to both ends, and the tensile property of the cable is detected. When the second slider 19 on the left side moves to the right, the third rack moves, and the rotation of the third gear 31 does not drive the transmission rod 7 to rotate due to the second one-way bearing between the third gear 31 and the transmission rod 7; After the pneumatic rod 18 is retracted for a preset time, the staff controls the pneumatic rod 18 to reset, so that the second slider 19 drives the third rack to reset, and the spring 33 resets and no longer pulls the cable. When the third rack moves back, the third gear 31 drives the transmission rod 7 to rotate, thereby driving the cross rod 21 to rotate through the transmission assembly 6. Due to the meshing of the two bevel gears 20, the bolt rod rotates, the adjusting block 11 moves down, the hollow roller 12 moves down, the cable bends downward, and the two winding wheels 3 drive the rotating rod 4 to rotate. Due to the first one-way bearing between the first gear 15 and the rotating rod 4, the first gear 15 does not rotate, so that the cable can have a certain angle, and the cable is still in a straight state. The staff controls the pneumatic rod 18 to retract again, so that the two winding wheels 3 rotate in the opposite direction again to pull the cable; When the staff controls the pneumatic rod 18 to reset again, the above process is repeated, so that the adjusting block 11 drives the hollow roller 12 to move down again, thereby continuously reducing the angle of the cable formed, so as to test the tensile properties of the cable under different angles; During the cable test, the fan 22 is always in operation, so as to draw the gas outside into the temperature adjusting box 23, and then discharge it after passing through the hollow roller 12. Since the gas enters through the uppermost air inlet channel 35 in the initial state, the surface of the hollow roller 12 will be at room temperature; When the adjusting block 11 moves down to the specified position, the subsequent rotation of the threaded rod will cause the adjusting block 11 to move up. When the adjusting block 11 moves down to the specified position, the inner top of the strip-shaped groove 38 will contact the upper pressure sensor 39. The pressure sensor 39 will generate an electrical signal and transmit it to the controller. The controller controls the electric telescopic rod 26 to retract a small distance, so that the second rack 30 moves, the short rod 28 rotates through the second gear 29, and the rotating disc 42 rotates by ninety degrees. At this time, the gas enters through the rear air inlet channel 35 due to the setting of the refrigerating fin 37, so that the gas passing through the inside of the hollow roller 12 is low-temperature gas, so that the middle position of the cable is in a low-temperature state, thereby detecting the tensile properties of the cable under low-temperature conditions in the subsequent detection; When the adjusting block 11 is reset after being moved up, the pressure sensor 39 below is pressed to generate an electrical signal which is transmitted to the controller, and the controller controls the electric telescopic rod 26 to retract a certain distance again, so that the short rod 28 drives the rotating disc 42 to rotate 90 degrees again, so that the temperature of the surface of the lower pressing hollow roller 12 slowly returns to room temperature, so that in the subsequent test process, whether the tensile strength of the cable changes after the temperature changes can be tested; After the adjusting block 11 is moved down to the specified position again, the electric telescopic rod 26 is retracted a certain distance again, so that the rotating disc 42 rotates 90 degrees again, so that the high-temperature gas enters the lower pressing hollow roller 12, so as to test the tensile property of the cable in the high-temperature environment. With subsequent tests, the adjusting block 11 is moved up, and when the adjusting block 11 is reset again, the staff can control the electric telescopic rod 26 to stretch and reset, so that the rotating disc 42 is reset, and at this time the cable can be taken off, and the test of the cable is completed.

[0025] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A cable tensile strength testing apparatus comprising a test bench (1), characterized in that: The upper end of the test bench (1) is fixedly connected with a support frame (8), a plurality of mounting blocks (2) are fixedly connected on the test bench (1), adjacent sides of the plurality of mounting blocks (2) are commonly rotatably connected with rotating rods (4), two rotating rods (4) are fixedly connected with winding wheels (3), two mounting blocks (2) located at the rear side are commonly provided with a pulling assembly, a rectangular opening is arranged on the test bench (1), the lower end of the support frame (8) is provided with a detection adjusting assembly, the detection adjusting assembly comprises two fixed blocks (9) arranged at the top of the support frame (8), adjacent sides of the two fixed blocks (9) are commonly fixedly connected with an adjusting box (10), the inner top of the adjusting box (10) is rotatably connected with a threaded rod, the threaded rod is threadedly connected with an adjusting block (11), the lower end of the adjusting block (11) is provided with a groove, the front and rear inner walls of the groove are commonly rotatably connected with a downward pressing hollow roller (12).

2. A cable tensile strength testing apparatus according to claim 1, wherein: The pulling assembly comprises strip-shaped boxes (5) arranged on the two mounting blocks (2), adjacent inner walls of the two strip-shaped boxes (5) are fixedly connected with pneumatic rods (18), the telescopic ends of the two pneumatic rods (18) are fixedly connected with second sliding blocks (19), the opposite sides of the two second sliding blocks (19) are fixedly connected with two guide telescopic rods (32), the telescopic ends of the two guide telescopic rods (32) are commonly fixedly connected with first sliding blocks (17), adjacent sides of the two first sliding blocks (17) and the corresponding second sliding blocks (19) are elastically connected through springs (33), the rear sides of the two rotating rods (4) extend into the strip-shaped boxes (5) and are provided with first gears (15), the opposite sides of the two first sliding blocks (17) are fixedly connected with first gear racks (16), and a first one-way bearing is arranged between the first gear (15) and the rotating rod (4).

3. A cable tensile strength testing apparatus according to claim 2, wherein: The strip-shaped box (5) located on the left side is rotatably connected with a transmission rod (7), the transmission rod (7) is provided with a third gear (31), the second sliding block (19) located on the left side is fixedly connected with a third gear rack matched with the third gear (31), the rear inner wall of the support frame (8) is rotatably connected with a cross rod (21), the cross rod (21) and the transmission rod (7) are drivingly connected through a transmission assembly (6), the upper end of the threaded rod extends to the outside, and the cross rod (21) and the threaded rod are both provided with bevel gears (20) that are in mesh with each other.

4. The cable tensile strength testing apparatus of claim 1, wherein: The front side of the adjusting block (11) is provided with a rotary joint (13), the rear side of the rotary joint (13) communicates with the downward pressing hollow roller (12), the rear side of the downward pressing hollow roller (12) communicates with the outside, a fan (22) is mounted on the upper end of the support frame (8), the air outlet end of the fan (22) communicates with the front side of the rotary joint (13) through a hose (14), a temperature adjusting box (23) is mounted on the upper end of the support frame (8), a transition cavity (40) is arranged in the temperature adjusting box (23), the rear side of the transition cavity (40) communicates with the air inlet end of the fan (22), and a temperature adjusting assembly is arranged in the temperature adjusting box (23).

5. A cable tensile strength testing apparatus as claimed in claim 4, wherein: The temperature adjusting assembly comprises an air inlet cavity (41) arranged in the temperature adjusting box (23), the front side of the air inlet cavity (41) is communicated with the outside through an air inlet (24), the air inlet cavity (41) is communicated with a transition cavity (40) through a plurality of air inlet channels (35), an electric heating plate (36) is arranged in the air inlet channel (35) at the front side, a refrigeration sheet (37) is embedded in the rear side inner wall of the air inlet channel (35) at the rear side, and the heating end of the refrigeration sheet (37) extends to the outside.

6. A cable tensile strength testing apparatus as claimed in claim 5, wherein: The front side inner wall of the air inlet cavity (41) is rotationally connected with a short rod (28), the left side of the short rod (28) is fixedly connected with a rotating disc (42), the rotating disc (42) is provided with a round opening (43), the front side of the temperature adjusting box (23) is fixedly connected with a control box (25), the front side of the short rod (28) extends into the control box (25) and is fixedly connected with a second gear (29), the right side inner wall of the control box (25) is fixedly connected with an electric telescopic rod (26), the telescopic end of the electric telescopic rod (26) is fixedly connected with a moving block (27), the left side of the moving block (27) is fixedly connected with a second gear rack (30) engaged with the second gear (29).

7. The cable tensile strength testing apparatus of claim 1, wherein: The rear side of the adjusting block (11) is provided with a strip-shaped groove (38), the rear side inner wall of the adjusting box (10) is fixedly connected with a trigger block, and the upper and lower sides of the trigger block are both provided with pressure sensors (39).

8. A cable tensile strength testing apparatus as claimed in claim 3, wherein: The transmission assembly (6) comprises sprockets arranged on a transmission rod (7) and a cross rod (21), and the two sprockets are connected through a chain.

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