Peelability testing machine for extruded insulated cable shielding

Abstract

The utility model discloses a peelability testing machine for extruded insulated cable shielding. The peelability testing machine comprises a case, a first clamping mechanism, a moving mechanism and a second clamping mechanism, the position, corresponding to the insulated wire core, in the first clamping mechanism is a clamping working position, the clamping working position is matched with the outer contour of the insulated wire core, and a force value sensor is fixedly arranged between the moving mechanism and the second clamping mechanism; the distance between the moving mechanism and the first clamping mechanism meets the length of an insulated wire core required in a test standard, the distance between the second clamping mechanism and the first clamping mechanism meets the pulling length of a strip-shaped belt required in the test standard, and the sliding distance of the moving mechanism meets the pulling distance required in the test standard. The pull-open angle of the second clamping mechanism to the strip-shaped belt meets the angle stripping and cutting requirements in the test standard. According to the utility model, the specialty and the test precision of the insulation shielding stripping force test are improved, and the purchase cost is saved; the stripping test device is suitable for stripping test of the shielding layer of the extruded insulated cable.

Description

Technical Field

[0001] The utility model relates to a mechanical device, in particular to a peelability testing machine for extruded insulation cable shielding. Background Art

[0002] GB / T 12706.2-2020 standard stipulates the performance requirements and test methods for extruded insulation power cables and accessories, including the peel force test of insulation shielding. Peel force is an important indicator to measure the bonding strength between the cable insulation layer and the conductor or shielding layer. The GB / T 12706.2-2020 standard stipulates that the peel force of the insulated cable should not be less than 4N and should not be greater than 45N. If the peel force does not meet the standard requirements, it means that when the cable is subjected to external pressure or tension, the insulation layer may separate from the conductor or shielding layer, resulting in a decline in cable performance and even leading to safety accidents. At the same time, it is also necessary to measure the peel force after the cable is aged. By comparing the peel force values before and after aging, the performance change of the cable insulation layer can be evaluated, and then the service life and safety of the cable can be judged.

[0003] The steps of the peel force test are as follows:

[0004] a. Remove the insulated conductor cores with a length of at least 250mm from the test cables before and after aging as specimens;

[0005] b. On the extruded insulation shielding surface of each specimen, make two parallel incisions into the insulation from one end to the other end of the specimen, with a width of (10±1)mm between them;

[0006] c. After pulling out a strip with a length of 50mm and a width of 10mm along the direction parallel to the insulated conductor core (i.e., the peeling angle is approximately 180°), vertically install the insulated conductor core on the tensile testing machine, clamp one end of the insulated conductor core with a chuck, and clamp the 10mm strip with the other chuck;

[0007] d. Apply a tensile force to separate the 10mm strip from the insulation and pull it at least 100mm; the tensile force should be measured under the condition that the peeling angle is approximately 180° and the speed is (250±50)mm / min;

[0008] e. Continuously record the peel force values of the specimens before and after aging.

[0009] At present, a universal tensile testing machine is often used to conduct the peeling test on the shielding layer of extruded insulation cables. However, as the name implies, a universal tensile testing machine is applicable to a variety of scenarios, and its built-in fixtures are also general-purpose, not only adapted to cables. Therefore, it has poor professionalism and low test accuracy, and moreover, the cost of purchasing external equipment is relatively high. Content of the Utility Model

[0010] To solve the above deficiencies in the existing technology, the present utility model aims to provide a peelability testing machine for the shield of extruded insulated cables, so as to specifically conduct a peeling test on the shield layer of extruded insulated cables and improve the professionalism and accuracy of the test.

[0011] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0012] A peelability testing machine for the shield of extruded insulated cables, comprising a chassis, a first clamping mechanism fixedly arranged on the chassis for clamping an insulated wire core, a moving mechanism slidably arranged on the chassis, and a second clamping mechanism fixedly arranged on one side of the moving mechanism close to the first clamping mechanism for pressing a strip-shaped belt;

[0013] The position corresponding to the insulated wire core in the first clamping mechanism is a clamping working position, and the clamping working position is adapted to the outer contour of the insulated wire core. The sliding direction of the moving mechanism is arranged along the axial direction of the insulated wire core, and a force value sensor is fixedly arranged between the moving mechanism and the second clamping mechanism;

[0014] The distance between the moving mechanism and the first clamping mechanism meets the length of the insulated wire core required in the test standard, the distance between the second clamping mechanism and the first clamping mechanism meets the pulling-open length of the strip-shaped belt required in the test standard, the sliding distance of the moving mechanism on the chassis meets the pulling-open distance required in the test standard, and the pulling-open angle of the strip-shaped belt by the second clamping mechanism meets the stripping angle requirement in the test standard.

[0015] As a limitation to the present utility model: The first clamping mechanism includes a first fixing frame fixedly arranged on the chassis and a first moving member movably arranged on the first fixing frame; a first clamping block is fixedly arranged on the first fixing frame, and the position corresponding to the insulated wire core on the first clamping block is set as a first arc surface; the first moving member includes a second clamping block slidably arranged on the first fixing frame in the vertical direction, and the position corresponding to the insulated wire core on the second clamping block is set as a second arc surface. The first arc surface and the second arc surface are oppositely opened to form a clamping working position.

[0016] As a further limitation to the present utility model: The first moving member further includes a first lead screw rotatably arranged on the first fixing frame, and the first lead screw vertically penetrates through the first fixing frame; the second clamping block is arranged at the bottom end of the first lead screw, and the bottom end of the first lead screw is rotatably clamped in the second clamping block.

[0017] As another limitation to the present utility model: The moving mechanism includes a moving plate slidably arranged on the chassis and a driving component for driving the moving plate to slide. The second clamping mechanism is fixedly arranged at one end of the moving plate away from the chassis, and the force value sensor is fixedly arranged between the moving plate and the second clamping mechanism.

[0018] As a further limitation to the present utility model: The drive assembly includes a motor, a synchronous belt, a lead screw, and at least one optical axis. The lead screw is rotatably arranged on the chassis through a lead screw seat, the axial direction of the lead screw is parallel to the axial direction of the insulated wire core, and a lead screw nut is sleeved on the lead screw; the optical axis is fixedly arranged in the chassis and is parallel to the lead screw, and a sliding block is slidably sleeved on the optical axis; the lead screw nut and the sliding block are jointly connected with a connecting plate, and a moving plate is vertically fixed on the connecting plate; the synchronous belt is sleeved on the output shaft of the motor, and the end of the synchronous belt away from the motor is sleeved on the lead screw.

[0019] As a further limitation to the present utility model: The drive assembly is arranged inside the chassis, the moving plate penetrates through the top surface of the chassis, and a through hole extending along the axial direction of the insulated wire core is arranged on the top surface of the chassis, and the length of the through hole meets the pulling distance required in the test standard.

[0020] As a further limitation to the present utility model: A limiting plate is fixedly arranged on the connecting plate, and a first limiting block and a second limiting block for limiting the moving distance of the limiting plate are fixedly arranged in the chassis.

[0021] As another limitation to the present utility model: The second clamping mechanism includes a second fixing frame, and a second moving part movably arranged on the second fixing frame, and the force value sensor is fixedly connected with the second fixing frame;

[0022] The second moving part includes a pressing block, a second lead screw, and at least one limiting column; the second lead screw is rotatably arranged on the second fixing frame, and the second lead screw vertically penetrates through the second fixing frame; the pressing block is arranged at the bottom end of the second lead screw, and the bottom end of the second lead screw is rotatably clamped in the pressing block; the limiting column is parallel to the second lead screw and penetrates through the second fixing frame, the bottom end of the limiting column is fixedly connected with the pressing block, and the top end of the limiting column is movably sleeved on the second fixing frame;

[0023] A supporting plate is arranged on the second fixing frame, and a pressing space for pressing the strip-shaped belt is formed between the pressing block and the supporting plate.

[0024] As a further limitation to the present utility model: The contact surface between the pressing block and the strip-shaped belt and the contact surface between the supporting plate and the strip-shaped belt are both serrated.

[0025] As a further limitation to the present utility model: A drag chain is arranged on the top surface of the chassis, the drag chain extends along the sliding direction of the moving plate, one end of the drag chain is fixedly arranged on the chassis, and the other end is fixed on the moving plate.

[0026] Due to the adoption of the above technical solutions, compared with the prior art, the beneficial effects obtained by the present utility model are:

[0027] The utility model includes a chassis, a first clamping mechanism fixedly arranged on the chassis, a moving mechanism slidably arranged on the chassis, and a second clamping mechanism fixedly arranged on the moving mechanism; during use, the first clamping mechanism clamps an insulating wire core, the second clamping mechanism presses a strip, the second clamping mechanism and the moving mechanism are slid in a direction away from the first clamping mechanism, so that the strip is pulled away from the insulating wire core, and the stripping test of the extruded insulating cable shielding layer is completed. The pulling force magnitude is read through a force value sensor, which is the stripping force value;

[0028] The first clamping mechanism includes a first clamping block and a second clamping block. The first arc surface on the first clamping block and the second arc surface on the second clamping block are oppositely opened to form a clamping working position adapted to the outer contour of the insulating wire core. Compared with clamping the insulating wire core by a general fixture on a universal tensile testing machine in the prior art, the utility model has higher professionalism and higher test accuracy;

[0029] The second clamping block can slide up and down relative to the first clamping block, and the size of the clamping working position will also change accordingly, so as to clamp insulating wire cores with different diameters.

[0030] In summary, the utility model improves the professionalism and test accuracy of the insulating shielding stripping force test and saves the procurement cost; the utility model is applicable to the stripping test of the extruded insulating cable shielding layer. Description of the Drawings

[0031] The following further describes the utility model in detail with reference to the drawings and specific embodiments.

[0032] Figure 1 It is a schematic structural diagram of an embodiment of the utility model;

[0033] Figure 2 It is a schematic structural diagram of the first clamping mechanism in an embodiment of the utility model;

[0034] Figure 3 It is a schematic structural diagram of the second clamping mechanism in an embodiment of the utility model;

[0035] Figure 4 It is a schematic structural diagram of the second clamping mechanism and a moving plate in an embodiment of the utility model;

[0036] Figure 5 It is a schematic structural diagram of the moving mechanism and the second clamping mechanism in an embodiment of the utility model;

[0037] Figure 6 It is a schematic structural diagram of the moving mechanism in an embodiment of the utility model;

[0038] Figure 7 It is a schematic structural diagram of the embodiment of the utility model from another perspective (the rear side plate is not shown);

[0039] Figure 8 Schematic structural diagram of pulling a strip on an insulated wire core

[0040] Figure 9 Partial structural schematic diagram of the chassis and the rear side plate in the embodiment of the present utility model

[0041] In the figure: 1 - chassis, 11 - through hole;

[0042] 2 - first clamping mechanism, 21 - clamping working position, 22 - first fixing frame, 221 - vertical rod, 222 - horizontal plate, 23 - first moving member, 231 - second clamping block, 2311 - second arc surface, 232 - first lead screw, 24 - first clamping block, 241 - first arc surface;

[0043] 3 - moving mechanism, 301 - moving plate, 3011 - vertical plate, 3012 - horizontal plate, 302 - motor, 303 - synchronous belt, 304 - lead screw, 305 - optical axis, 306 - lead screw seat, 307 - lead screw nut, 308 - sliding block, 309 - connecting plate, 310 - limiting plate, 311 - first limiting block, 312 - second limiting block;

[0044] 4 - second clamping mechanism, 41 - second fixing frame, 411 - first fixing plate, 412 - second fixing plate, 42 - pressing block, 43 - second lead screw, 44 - limiting column, 45 - supporting plate;

[0045] 5 - force value sensor, 6 - drag chain, 7 - leg, 8 - button, 9 - insulated wire core, 10 - strip Specific embodiments

[0046] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustration and explanation of the present utility model, and do not constitute a limitation to the present utility model.

[0047] The orientation terms or position relationships such as "upper", "lower", "left", "right", "front", "rear", etc. described in the embodiments are based on the orientation relationships in the accompanying drawings of the specification of the present utility model Figure 1 and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the content protected by the present utility model.

[0048] As Figures 1 to 9As shown in the figure, this embodiment includes a chassis 1, a first clamping mechanism 2 fixedly arranged on the chassis 1 for clamping an insulating wire core 9, a moving mechanism 3 slidably arranged on the chassis 1, and a second clamping mechanism 4 fixedly arranged on one side of the moving mechanism 3 close to the first clamping mechanism 2 for pressing a strip 10. A force value sensor 5 is fixedly arranged between the moving mechanism 3 and the second clamping mechanism 4. During use, the first clamping mechanism 2 clamps the insulating wire core 9, and the second clamping mechanism 4 presses the strip 10. The second clamping mechanism 4 and the moving mechanism 3 are slid in a direction away from the first clamping mechanism 2, so that the strip 10 is pulled away from the insulating wire core 9, and the stripping test of the extruded insulating cable shielding layer is completed. The pulling force magnitude is read through the force value sensor 5, which is the stripping force value. The position corresponding to the insulating wire core 9 in the first clamping mechanism 2 is a clamping working position 21, and the clamping working position 21 is adapted to the outer contour of the insulating wire core 9 to improve the professionalism and test accuracy of the insulating shielding stripping force test.

[0049] I. The first clamping mechanism 2;

[0050] As Figure 1 , 2 shown in the figure, the first clamping mechanism 2 includes a first fixing frame 22 fixedly arranged on the chassis 1 and a first moving member 23 movably arranged on the first fixing frame 22.

[0051] As Figure 2 shown in the figure, the first fixing frame 22 includes two parallel vertical rods 221 vertically and fixedly arranged on the top surface of the chassis 1, and a cross plate 222 is commonly connected to the tops of the two vertical rods 221. A first clamping block 24 is fixedly arranged on the first fixing frame 22. Specifically, the first clamping block 24 is fixedly sleeved on the two vertical rods 221.

[0052] The first moving member 23 includes a second clamping block 231 and a first lead screw 232. The second clamping block 231 is slidably arranged on the first fixing frame 22 in the vertical direction. As Figure 2As shown in the figure, in this embodiment, the second clamping block 231 has a hollow cube structure. The second clamping block 231 is slidably sleeved on two vertical rods 221 of the first fixing frame 22, and the second clamping block 231 is sleeved outside the first clamping block 24. The first lead screw 232 is rotatably arranged on the first fixing frame 22. Specifically, the first lead screw 232 vertically penetrates the cross plate 222 of the first fixing frame 22 and is threadedly connected to the cross plate 222. A handle convenient for hand rotation is fixedly arranged at the top of the first lead screw 232. The second clamping block 231 is arranged at the bottom end of the first lead screw 232, and the bottom end of the first lead screw 232 is rotatably clamped in the second clamping block 231. The rotation and clamping method adopts the existing technology. Specifically, an annular groove is formed on the second clamping block 231. The bottom end of the first lead screw 232 extends into the annular groove, and a setscrew is fixedly arranged at the bottom end of the first lead screw 232 for limiting to prevent the first lead screw 232 from disengaging from the annular groove and ensure that the bottom of the first lead screw 232 can rotate in the annular groove.

[0053] The principle of the up-and-down sliding of the second clamping block 231 is as follows: Rotate the first lead screw 232. The first lead screw 232 rotates relative to the second clamping block 231. Since the first fixing frame 22 is fixedly arranged, under the screw thread fit, the first lead screw 232 moves up and down, driving the second clamping block 231 to slide up and down.

[0054] In this embodiment, the second clamping block 231 is driven by the first lead screw 232 to slide up and down. Of course, any structure in the existing technology can also be adopted, as long as it can realize that the first clamping block 24 and the second clamping block 231 can clamp the insulating wire cores 9 of different sizes.

[0055] As Figure 2 shown in the figure, the position corresponding to the insulating wire core 9 in the first clamping mechanism 2 is the clamping working position 21. Specifically, the insulating wire core 9 is clamped by the first clamping block 24 and the second clamping block 231. In this embodiment, the lower surface of the first clamping block 24 is set as the first arc surface 241, the first arc surface 241 opens downward, and the first arc surface 241 contacts the upper edge of the insulating wire core 9; the inner side surface at the bottom of the second clamping block 231 is set as the second arc surface 2311 opposite to the opening of the first arc surface 241, and the second arc surface 2311 contacts the lower edge of the insulating wire core 9; the first arc surface 241 and the second arc surface 2311 form a clamping working position 21 adapted to the outer contour of the insulating wire core 9. Here, being adapted means that when the insulating wire core 9 is clamped, the first arc surface 241 is completely attached to the insulating wire core 9, and the second arc surface 2311 is completely attached to the insulating wire core 9. In this embodiment, the second clamping block 231 can slide up and down. Correspondingly, the size of the clamping working position 21 will also change accordingly, and the insulating wire cores 9 with different diameters can be clamped.

[0056] II. Moving mechanism 3;

[0057] AsFigure 1 As shown, the sliding direction of the moving mechanism 3 is set along the axial direction of the insulated wire core 9, that is, along the left and right directions.

[0058] As Figure 1 , 4 -6 shows, the moving mechanism 3 includes a moving plate 301 slidably arranged on the chassis 1, and a driving component for driving the sliding of the moving plate 301.

[0059] In this embodiment, the driving component is arranged inside the chassis 1, making the appearance neater. Of course, it can also be arranged on the upper surface of the chassis 2. As Figure 5 , 6 shown, the driving component includes a motor 302, a synchronous belt 303, a lead screw 304 and at least one optical axis 305; the lead screw 304 is rotatably arranged on the chassis 1 through a lead screw seat 306, the axial direction of the lead screw 304 is parallel to the axial direction of the insulated wire core 9, that is, the axial direction of the lead screw 304 is along the left and right directions, and a lead screw nut 307 is sleeved on the lead screw 304. In this embodiment, the number of optical axes 305 is two, and the two optical axes 305 are both fixedly arranged inside the chassis 1 and are parallel to the lead screw 304, and a sliding block 308 is slidably sleeved on each of the two optical axes 305. The lead screw nut 307 and the two sliding blocks 308 are jointly connected with a connecting plate 309, and the moving plate 301 is vertically fixed on the connecting plate 309 and penetrates through the top surface of the chassis 1, and the moving plate 301 extends out from the top surface of the chassis 1. Refer to Figure 1 , 4 , a through hole 11 extending along the axial direction of the insulated wire core 9 is arranged on the top surface of the chassis 1, and the moving plate 301 is located in the through hole 11 and slides left and right in the through hole 11. As Figures 4 - 6 shown, in this embodiment, the moving plate 301 includes two vertical plates 3011 fixedly arranged on the connecting plate 309 in parallel and at intervals, the number of through holes 11 is set to two, and one vertical plate 3011 passes through each through hole 11, and the tops of the two vertical plates 3011 are jointly connected with a horizontal plate 3012. The length of the through hole 11 meets the pulling distance required in the test standard. Here, the length refers to the distance in the left and right directions, that is, the length of the through hole 11 ≥ 100 mm. The motor 302 and the synchronous belt 303 are used to realize the rotation of the lead screw 304. The synchronous belt 303 is sleeved on the output shaft of the motor 302, and the end of the synchronous belt 303 away from the motor 302 is sleeved on the lead screw 304.

[0060] The sliding principle of the moving plate 301 is as follows: The rotation of the motor 302 drives the synchronous belt 303 to rotate, causing the lead screw 304 to rotate. The lead screw nut 307 and the connecting plate 309 tend to rotate following the lead screw 304. However, since the connecting plate 309 is fixedly connected to the sliding block 308, the optical axis 305 limits the movement of the connecting plate 309, preventing it from rotating. Therefore, under the action of the thread fit, the lead screw nut 307 and the connecting plate 309 can only move axially along the lead screw 304, achieving the left and right sliding of the moving plate 301.

[0061] It should be added that the drive assembly in this embodiment is the motor 302, the synchronous belt 303, and the lead screw 304. Of course, any structure in the prior art can also be adopted, such as a cylinder, as long as it can make the moving plate 301 slide left and right to achieve the peeling of the extruded insulating cable shielding layer. In this embodiment, the optical axis 305 is used for limiting, and its number can also be set to one or three.

[0062] Furthermore, as Figure 6 、 7 shown, a limiting plate 310 is fixedly arranged on the connecting plate 309. In this embodiment, the limiting plate 310 is fixedly arranged on the sliding block 308 at the rear side of the chassis 1. The limiting plate 310 is T-shaped, with the T-shaped head fixedly arranged on the sliding block 308. A first limiting block 311 and a second limiting block 312 for limiting the moving distance of the limiting plate 310 are fixedly arranged at the bottom inside the chassis 1. The distance between the first limiting block 311 and the second limiting block 312 is ≥100 mm, which is 100 mm in this embodiment. When the moving plate 301 slides left until the bottom end of the limiting plate 310 contacts the first limiting block 311, or when the moving plate 301 slides right until the bottom end of the limiting plate 310 contacts the second limiting block 312, it is the limit distance of the movement of the moving plate 301. It should be noted that a rear side plate is fixed to the rear side of the chassis 1. Refer to Figure 9 , Figure 7 where the rear side plate is not shown in

[0063] III. The second clamping mechanism 4;

[0064] As Figure 1 、 3 shown, the second clamping mechanism 4 is fixedly arranged at one end of the moving plate 301 away from the chassis 1. The second clamping mechanism 4 includes a second fixing frame 41 and a second moving member movably arranged on the second fixing frame 41.

[0065] The second fixing frame 41 is in an inverted L shape, including a first fixing plate 411 and a second fixing plate 412 that are vertically and fixedly connected. A support plate 45 is arranged on the second fixing frame 41. In this embodiment, the support plate 45 is vertically and fixedly arranged at the bottom of the first fixing plate 411, and the support plate 45 is parallel to the second fixing plate 412.

[0066] The second moving part includes a pressing block 42, a second lead screw 43 and at least one limiting post 44;

[0067] The second lead screw 43 is rotatably arranged on the second fixing frame 41. The second lead screw 43 vertically penetrates the second fixing frame 41. In this embodiment, the second lead screw 43 vertically penetrates the second fixing plate 412 and is threadedly connected to the second fixing plate 412. A handle convenient for hand rotation is also fixedly provided at the top of the second lead screw 43; the pressing block 42 is arranged at the bottom end of the second lead screw 43. The bottom end of the second lead screw 43 is rotatably clamped in the pressing block 42. The rotation clamping method adopts the prior art. Specifically, an annular groove is formed in the pressing block 42. The bottom end of the second lead screw 43 extends into the annular groove. A set screw is fixedly provided at the bottom end of the second lead screw 43 for limiting to prevent the second lead screw 43 from disengaging from the annular groove and ensure that the bottom of the second lead screw 43 can rotate in the annular groove.

[0068] Further, in this embodiment, the number of the limiting posts 44 is set to two, and it can also be set to one or three. The two limiting posts 44 are both parallel to the second lead screw 43 and penetrate the second fixing plate 412. The bottom ends of the limiting posts 44 are fixedly connected to the pressing block 42, and the top ends of the limiting posts 44 are movably sleeved on the second fixing plate 412; a pressing space for pressing the strip 10 is formed between the pressing block 42 and the support plate 45.

[0069] The pressing principle is as follows: Rotate the second lead screw 43. The second lead screw 43 rotates relative to the second fixing plate 412. Since the second fixing frame 41 is fixedly arranged, under the screw thread fit between the second fixing plate 412 and the second lead screw 43 and the action of the limiting posts 44, the second lead screw 43 can only move up and down, driving the pressing block 42 and the limiting posts 44 to slide up and down. When the pressing block 42 moves downward, the strip 10 can be pressed tightly between the pressing block 42 and the support plate 45.

[0070] It should be added that the size of the support plate 45 is relatively thin to meet the requirement that the peeling angle is approximately 180° in the test standard.

[0071] To improve this embodiment, as Figure 3 shown, the contact surface between the pressing block 42 and the strip 10 (i.e., the lower surface of the pressing block 42) and the contact surface between the support plate 45 and the strip 10 (i.e., the upper surface of the support plate 45) are both serrated, so as to better press the strip 10 and prevent the strip 10 from disengaging between the pressing block 42 and the support plate 45 due to insufficient pressing force during pulling.

[0072] As Figure 1 、 3As shown in FIGS. 4, 5, and 7, a force value sensor 5 is fixedly provided between the moving mechanism 3 and the second clamping mechanism 4. Specifically, the force value sensor 5 is fixedly provided between the horizontal plate 3012 and the first fixing plate 411. The force value sensor 5 is connected to the horizontal plate 3012 and the first fixing plate 411 by bolts.

[0073] It should be particularly noted that the distance between the moving mechanism 3 and the first clamping mechanism 2 (referred to as D1) meets the length of the insulated wire core 9 required in the test standard, that is, D1≥250 mm, so that the insulated wire core 9 can be placed between the moving mechanism 3 and the first clamping mechanism 2.

[0074] The distance between the second clamping mechanism 4 and the first clamping mechanism 2 (referred to as D2) meets the pulling length of the strip 10 required in the test standard. The length of the pulled strip 10 mentioned in the test standard is 50 mm. When the strip 10 is folded to the right, the distance from the end point A of the strip 10 to the left end of the insulated wire core 9 should be 100 mm. See Figure 8 , so D2 should be ≤100 mm, otherwise the second clamping mechanism 4 cannot reach the end point A of the strip 10 and cannot press the strip 10 tightly. It should be noted that Figure 8 what is shown in is not the state during the test process, and the peeling angle of the strip 10 is not 180°. This figure is only for illustration to clearly observe the positional relationship between the insulated wire core 9 and the strip 10.

[0075] The sliding distance of the moving mechanism 3 on the chassis 1 (referred to as D3) meets the pulling distance required in the test standard, that is, D3≥100 mm.

[0076] The pulling angle of the second clamping mechanism 4 on the strip 10 meets the stripping angle requirements in the test standard. In other words, when pulling the strip 10, it is necessary to ensure that the strip 10 is as close as possible to the insulated wire core 9. In this embodiment, the support plate 45 is relatively thin. When pulling the strip 10, the peeling angle can be approximately 180°.

[0077] Regarding the speed requirement for measuring the pulling force in the test standard is (250±50) mm / min, which can be achieved by adjusting the corresponding parameters of the motor 302.

[0078] IV. Drag chain 6;

[0079] As shown in Figure 1 and 7 , a drag chain 6 is provided on the top surface of the chassis 1. The drag chain 6 adopts the existing technology. The drag chain 6 extends along the sliding direction of the moving plate 301, that is, along the left and right directions. The left end of the drag chain 6 is fixedly provided on the chassis 1, and the right end is fixed on the horizontal plate 3012 of the moving plate 301. The connecting wire on the force value sensor 5 is hidden in the drag chain 6 and led into the chassis 1, improving the cleanliness of the appearance.

[0080] V. Chassis 1;

[0081] As Figure 1 shown, heat dissipation holes are provided on the left and right side plates of the chassis 1, and a leg 7 is fixedly provided at each of the four corners at the bottom of the chassis 1. During use, the device can be placed on a table for the peeling test.

[0082] A power button 8 is provided on the outer shell of the chassis 1 for powering on the motor 302 or other devices. A weighing module and a PLC system are provided inside the chassis 1. The force value sensor 5 transmits the signal to the weighing module, and the weighing module then sends the signal to the PLC. Finally, the pulling force value (i.e., the peeling force value) is displayed on the computer. This part is prior art and will not be described in detail in this embodiment.

[0083] When using this embodiment, the insulating wire core 9 is installed on the device. One end of the strip 10 pulled on the insulating wire core 9 is clamped on the first clamping mechanism 2, the strip 10 is pressed against the second clamping mechanism 4, the bottom edge of the support plate 45 contacts the upper edge of the insulating wire core 9, the motor 302 is started, and the moving plate 301 moves to the right until it stops when the limiting plate 310 contacts the second limiting block 312. At this time, the pulling distance is 100 mm, and the pulling force value is read through the force value sensor 5, which is the peeling force value.

[0084] It should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A peelability testing machine for the shield of an extruded insulated cable, characterized in that, It includes a chassis, a first clamping mechanism fixedly arranged on the chassis for clamping an insulating wire core, a moving mechanism slidably arranged on the chassis, and a second clamping mechanism fixedly arranged on a surface of the moving mechanism close to the first clamping mechanism for pressing a strip-shaped belt; The position corresponding to the insulating wire core in the first clamping mechanism is the clamping working position, and the clamping working position is adapted to the outer contour of the insulating wire core. The sliding direction of the moving mechanism is arranged along the axial direction of the insulating wire core, and a force value sensor is fixedly arranged between the moving mechanism and the second clamping mechanism; The distance between the moving mechanism and the first clamping mechanism meets the length of the insulating wire core required in the test standard. The distance between the second clamping mechanism and the first clamping mechanism meets the pulling length of the strip-shaped belt required in the test standard. The sliding distance of the moving mechanism on the chassis meets the pulling distance required in the test standard. The pulling angle of the strip-shaped belt by the second clamping mechanism meets the stripping angle requirement in the test standard.

2. The peelability testing machine for the extrusion-insulated cable shield according to claim 1, wherein The first clamping mechanism includes a first fixing frame fixedly arranged on the chassis and a first moving part movably arranged on the first fixing frame; a first clamping block is fixedly arranged on the first fixing frame, and the position corresponding to the insulating wire core on the first clamping block is set as a first arc surface; the first moving part includes a second clamping block slidably arranged on the first fixing frame in the vertical direction, and the position corresponding to the insulating wire core on the second clamping block is set as a second arc surface. The first arc surface and the second arc surface are oppositely opened to form the clamping working position.

3. The peelability testing machine for the shield of an extruded insulated cable according to claim 2, characterized in that, The first moving part further includes a first lead screw rotatably arranged on the first fixing frame, and the first lead screw vertically penetrates through the first fixing frame; the second clamping block is arranged at the bottom end of the first lead screw, and the bottom end of the first lead screw is rotatably clamped in the second clamping block.

4. The peelability testing machine for the extrusion-insulated cable shield according to any one of claims 1-3, characterized in that, The moving mechanism includes a moving plate slidably arranged on the chassis and a driving component for driving the sliding of the moving plate. The second clamping mechanism is fixedly arranged at one end of the moving plate away from the chassis, and the force value sensor is fixedly arranged between the moving plate and the second clamping mechanism.

5. The peelability testing machine for the extrusion-insulated cable shield according to claim 4, characterized in that, The driving component includes a motor, a synchronous belt, a lead screw and at least one optical axis. The lead screw is rotatably arranged on the chassis through a lead screw seat, the axial direction of the lead screw is parallel to the axial direction of the insulating wire core, and a lead screw nut is sleeved on the lead screw; the optical axis is fixedly arranged in the chassis and is parallel to the lead screw, and a sliding block is slidably sleeved on the optical axis; the lead screw nut and the sliding block are jointly connected with a connecting plate, and the moving plate is vertically fixedly arranged on the connecting plate; the synchronous belt is sleeved on the output shaft of the motor, and the end of the synchronous belt away from the motor is sleeved on the lead screw.

6. The peelability testing machine for the extrusion-insulated cable shield according to claim 5, characterized in that, The driving component is arranged inside the chassis, the moving plate penetrates through the top surface of the chassis, and a through hole extending along the axial direction of the insulating wire core is arranged on the top surface of the chassis, and the length of the through hole meets the pulling distance required in the test standard.

7. The peelability testing machine for the extrusion-insulated cable shield according to claim 6, characterized in that, A limiting plate is fixedly arranged on the connecting plate, and a first limiting block and a second limiting block for limiting the moving distance of the limiting plate are fixedly arranged in the chassis.

8. The peelability testing machine for the extrusion-insulated cable shield according to any one of claims 1-3, 5-7, characterized in that, The second clamping mechanism includes a second fixing frame and a second moving part movably arranged on the second fixing frame, and the force value sensor is fixedly connected with the second fixing frame; The second moving member includes a pressing block, a second lead screw, and at least one limiting post; the second lead screw is rotatably arranged on the second fixing frame, and the second lead screw vertically penetrates through the second fixing frame; the pressing block is arranged at the bottom end of the second lead screw, and the bottom end of the second lead screw is rotatably clamped in the pressing block; the limiting post is parallel to the second lead screw and penetrates through the second fixing frame, the bottom end of the limiting post is fixedly connected to the pressing block, and the top end of the limiting post is movably sleeved on the second fixing frame; A supporting plate is arranged on the second fixing frame, and a pressing space for pressing the strip-shaped belt is formed between the pressing block and the supporting plate.

9. The peelability testing machine for the extrusion-insulated cable shield according to claim 8, characterized in that, The contact surfaces of the pressing block and the strip-shaped belt, and the contact surfaces of the supporting plate and the strip-shaped belt are both serrated.

10. The peelability testing machine for the extrusion-insulated cable shield according to any one of claims 5-7 and 9, characterized in that, A drag chain is arranged on the top surface of the chassis, the drag chain extends along the sliding direction of the moving plate, one end of the drag chain is fixedly arranged on the chassis, and the other end is fixed on the moving plate.

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