A power cable length metering detection device

Abstract

This utility model relates to the field of cable length measurement and testing technology, and in particular to a power cable length measurement and testing device, including a base, on which a testing mechanism is provided for cable length measurement and testing. The testing mechanism includes: an unwinding assembly, which is provided on the base and used for unwinding the cable; an anti-deviation assembly, which is provided on the unwinding assembly and used to prevent deviation during the cable unwinding process; and a limiting assembly, including a mounting seat fixed to the front end of the top of the base, a vertical frame fixed to the rear end of the top of the mounting seat, and limiting wheels rotatably mounted on the left and right sides above the front end of the vertical frame. A base is fixed to the front end of the top of the mounting seat, and a shaft frame is pivotally connected to the upper left side of the upper end of the base. A measuring wheel is rotatably mounted inside the upper end of the shaft frame. After the cable is straightened and guided, it is stably clamped in the measuring channel formed by the upper and lower wheels. Under constant pressure, the measuring wheel rotates synchronously without slippage, completely eliminating jumping and slippage, and ensuring accurate measurement.

Description

Technical Field

[0001] This utility model relates to the field of cable length measurement and testing technology, specifically to a power cable length measurement and testing device. Background Technology

[0002] In the production, quality inspection, and finished product shipment of power cables, accurately obtaining the cable length is a fundamental and crucial process, which directly affects the accuracy of product cost accounting, transaction pricing, and subsequent construction and laying. According to CN210854804U, a cable rack capable of detecting cable length is disclosed. This technology discloses a cable rack capable of detecting cable length, comprising a housing, a conduit, a controller, a rotating device, and a line conveying device; the housing has a cable inlet at the upper right end, a rotating wheel is installed at the bottom of the housing, the controller is installed on the right side of the housing, the rotating device is installed inside the housing, the conduit is installed inside the cable inlet of the housing, and a line holder and a speed sensor are installed on the conduit. It has the technical advantages of "being able to record the length of the cable used, automatically controlling it through the controller, having high working efficiency, and being simple to operate". During the unwinding process, existing power cable length measuring devices cannot effectively suppress the inertial rotation of the cable reel. When the equipment stops or needs to be cut at a fixed point, the reel will continue to rotate due to inertia, causing the measured cable to loosen, pile up, or even become tangled and knotted. This not only disrupts the work rhythm but also causes distortion of length measurement data and waste of materials. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides a power cable length measuring and testing device. After the cable is straightened and guided, it is stably clamped in the measuring channel formed by upper and lower wheels. Under constant pressure, the measuring wheels rotate synchronously without slippage, completely eliminating jumping and slippage, and ensuring accurate measurement.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a power cable length measuring and testing device, comprising a base, wherein a testing mechanism is disposed on the base and used for cable length measuring and testing, the testing mechanism comprising: An unwinding assembly, mounted on a base, is used for unwinding cables; Anti-deviation component, installed on the unwinding assembly and used to prevent deviation during the cable unwinding process; The limiting component includes a mounting base fixed to the top front end of the base, a vertical frame fixed to the top rear end of the mounting base, limiting wheels rotatably mounted on the left and right sides of the front end of the vertical frame, a base fixed to the top front end of the mounting base, a shaft frame pivotally connected to the upper left side of the base, a length measuring wheel rotatably mounted inside the upper end of the shaft frame, limiting blocks rotatably mounted on the outer walls of both the front and rear ends of the shaft frame, and guide rods pivotally connected to both the front and rear sides of the right end of the base, with the upper ends of the guide rods slidingly connected to the limiting blocks, and springs sleeved on the outside of the guide rods.

[0005] Preferably, the unwinding assembly includes a base fixed to the top rear end of the base, a main shaft rotatably mounted between the front and rear ends inside the base, a circular seat fixed to the outer wall of the main shaft, four circumferentially distributed support plates slidably mounted on the front end of the circular seat, a sleeve slidably mounted on the front end of the main shaft, four circumferentially distributed support rods pivotally connected to the outer walls of both the front and rear ends of the sleeve, and the other end of the support rods pivotally connected to the support plates, a shaft seat fixed to the front end of the sleeve, a threaded rod rotatably mounted through the shaft seat, and the threaded rod is threadedly mounted to the main shaft.

[0006] Preferably, the unwinding assembly further includes guide wheels rotatably mounted on both sides of the outer wall of the rear end of the support plate.

[0007] Preferably, the anti-deviation assembly further includes an extension frame fixed to the outer wall of the left side of the base. A shaft is rotatably mounted on the upper end of the extension frame, a support arm is fixed to the front end of the shaft, a pressure roller is rotatably mounted inside the support arm, a support rod is fixed to the outer wall of the shaft, and a cylinder is pivotally connected to the lower end of the extension frame, with the output end of the cylinder pivotally connected to the support rod.

[0008] Preferably, the limiting component further includes a rotary encoder installed at the front end of the shaft frame and coaxially mounted with the measuring wheel, and a counter installed at the rear end of the shaft frame.

[0009] Preferably, the unwinding assembly further includes a power component mounted on the machine base for driving the spindle to rotate, a brake disc fixed at the rear end of the spindle, and an electromagnetic brake mounted at the rear end of the machine base.

[0010] Beneficial effects

[0011] This utility model provides a power cable length measuring and testing device. Compared with the prior art, it has the following advantages: 1. After the cable is drawn out from the unwinding assembly and initially straightened by the anti-deviation assembly, it is precisely guided into the measurement area of ​​the limiting assembly. Its specific path is constrained from above by two limiting wheels arranged on the left and right sides of the front end of the mounting bracket, thus ensuring that the cable is vertically guided to the upper surface of the measuring wheel directly below. At this time, under the constant upward pressure provided by the spring acting on the limiting block through the guide rod, the entire shaft frame swings upward around its pivot point, causing the measuring wheel to press the cable upward tightly, and finally making the cable stably clamped in the stable measurement channel formed by the two upper limiting wheels and the lower measuring wheel; eliminating the radial runout and axial movement of the cable, and ensuring that the measuring wheel rotates synchronously without slippage under the friction drive of the cable.

[0012] 2. When the cylinder extends, it pushes the shaft to rotate through the support rod, forcing the pressure roller to press down onto the cable surface, forming a controllable constraint pressure. This pressure can effectively suppress the radial runout and axial movement of the cable caused by unwinding inertia, its own rigidity, or irregularity of the reel, ensuring that the cable is always confined within the predetermined path and transported smoothly, thereby providing a stable and undisturbed material flow for the subsequent length measurement process. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the limiting component in this utility model; Figure 3 This is a schematic diagram of the tensioning wheel in this utility model; Figure 4 This is a schematic diagram of the internal structure of the unwinding assembly in this utility model; Figure 5 This is a partial cross-sectional structural diagram of the unwinding assembly in this utility model.

[0014] In the diagram: 1. Base; 2. Detection mechanism; 21. Unwinding assembly; 211. Machine base; 212. Main shaft; 213. Round seat; 214. Support plate; 215. Sleeve; 216. Support rod; 217. Shaft seat; 218. Threaded rod; 219. Guide wheel; 2110. Power unit; 2111. Brake disc; 2112. Electromagnetic brake; 22. Anti-deviation assembly; 221. Extension frame; 222. Shaft; 223. Support arm; 224. Pressure roller; 225. Support rod; 226. Cylinder; 23. Limiting assembly; 231. Mounting seat; 232. Stand; 233. Limiting wheel; 234. Base; 235. Shaft frame; 236. Length measuring wheel; 237. Limiting block; 238. Guide rod; 239. Spring; 2310. Rotary encoder; 2311. Counter. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 - Figure 5 This utility model provides a technical solution: a power cable length measuring and testing device, including a base 1, characterized in that: a testing mechanism 2 is provided on the base 1 for cable length measuring and testing, the testing mechanism 2 including: Unwinding assembly 21 is mounted on base 1 and used for unwinding cable; Anti-deviation component 22 is installed on unwinding component 21 and is used to prevent deviation during cable unwinding process; The limiting component 23 includes a mounting base 231 fixed to the top front end of the base 1. A stand 232 is fixed to the top rear end of the mounting base 231. Limiting wheels 233 are rotatably installed on the left and right sides above the front end of the stand 232. A base 234 is fixed to the top front end of the mounting base 231. A shaft frame 235 is pivotally connected to the upper left side of the base 234. A length measuring wheel 236 is rotatably installed inside the upper end of the shaft frame 235. Limiting blocks 237 are rotatably installed on the outer walls of the front and rear ends of the shaft frame 235. Guide rods 238 are pivotally connected to the front and rear sides of the right end of the base 234. The upper end of the guide rod 238 is slidably installed through the limiting block 237. A spring 239 is sleeved on the outside of the guide rod 238.

[0017] In this embodiment, the cable is led out from the unwinding assembly 21 and preliminarily straightened by the anti-deviation assembly 22, and then precisely guided into the measurement area of ​​the limiting assembly 23. Its specific path is constrained from above by two limiting wheels 233 arranged on the left and right sides of the front end of the upright frame 232 on the mounting base 231, thereby ensuring that the cable is vertically guided to the upper surface of the measuring wheel 236 directly below. At this time, under the constant upper pressure provided by the spring 239 through the guide rod 238 acting on the limiting block 237, the entire shaft frame 235 swings upward around its pivot point, causing the measuring wheel 236 to press the cable upward, and finally the cable is stably clamped in the stable measurement channel formed by the two upper limiting wheels 233 and the lower measuring wheel 236. This eliminates the radial runout and axial movement of the cable, and ensures that the measuring wheel 236 rotates synchronously without slippage under the friction drive of the cable.

[0018] Specifically, the unwinding assembly 21 includes a base 211 fixed to the top rear end of the base 1. A main shaft 212 is rotatably mounted between the front and rear ends inside the base 211. A circular seat 213 is fixed to the outer wall of the main shaft 212. Four circumferentially distributed support plates 214 are slidably mounted on the front end of the circular seat 213. A sleeve 215 is slidably mounted on the front end of the main shaft 212. Four circumferentially distributed support rods 216 are pivotally connected to the outer walls of both the front and rear ends of the sleeve 215. The other end of the support rods 216 is pivotally connected to the support plate 214. A shaft seat 217 is fixed to the front end of the sleeve 215. A threaded rod 218 is rotatably mounted through the shaft seat 217 and threadedly mounted to the main shaft 212.

[0019] In this embodiment, the cable reel is installed and fixed by the unwinding assembly 21. During operation, the cable reel is placed on four circumferentially distributed support plates 214. By rotating the threaded rod 218, it moves forward and backward relative to the main shaft 212, thereby driving the fixed bearing 217 and sleeve 215 to slide axially along the main shaft 212. The movement of the sleeve 215 is converted into radial thrust or tension on the four support plates 214 through the support rods 216 pivotally connected to its front and rear ends. This forces the four support plates 214 to expand outward or contract inward synchronously on the circular seat 213, thereby tightening or loosening the cable reel from the inside, realizing the quick clamping and disassembly of the cable reel.

[0020] Specifically, the unwinding assembly 21 also includes guide wheels 219 that are rotatably mounted on both sides of the outer wall of the rear end of the support plate 214.

[0021] In this embodiment, the rolling contact method of the guide wheel 219 significantly reduces the frictional resistance between the sliding mating surfaces of the support plate 214 and the round seat 213, transforming the originally possible sliding friction into smooth rolling friction. This transformation greatly improves the smoothness of movement and ease of operation of the support plate 214 during radial adjustment, while effectively avoiding the possible jamming, tilting, or asynchronous phenomena of the support plate 214 due to uneven frictional resistance. This ensures that the four support plates 214 can always move smoothly, synchronously, and accurately on the round seat 213, thereby making the tensioning force distribution of the drum more uniform and reliable, and improving the mechanical stability and operating efficiency of the entire adjustment mechanism.

[0022] Specifically, the anti-deviation assembly 22 also includes an extension frame 221 fixed to the outer left side of the base 211. A shaft 222 is rotatably mounted on the upper end of the extension frame 221. A support arm 223 is fixed to the front end of the shaft 222. A pressure roller 224 is rotatably mounted inside the support arm 223. A support rod 225 is fixed to the outer wall of the shaft 222. A cylinder 226 is pivotally connected to the lower end of the extension frame 221, and the output end of the cylinder 226 is pivotally connected to the support rod 225.

[0023] In this embodiment, when the cylinder 226 extends, the support rod 225 pushes the shaft 222 to rotate, forcing the pressure roller 224 to press down onto the cable surface, forming a controllable constraint pressure. This pressure can effectively suppress the radial runout and axial movement of the cable caused by unwinding inertia, its own rigidity, or irregularity of the reel, ensuring that the cable is always confined within the predetermined path and transported smoothly, thereby providing a stable and undisturbed material flow for the subsequent length measurement process.

[0024] Specifically, the limiting component 23 also includes a rotary encoder 2310 installed at the front end of the shaft bracket 235 and coaxially mounted with the length measuring wheel 236, and a counter 2311 installed at the rear end of the shaft bracket 235.

[0025] In this embodiment, when the measuring wheel 236 rotates precisely without slippage, this rotational motion is captured in real time by the rotary encoder 2310, which is directly coaxially mounted with the measuring wheel 236, and converted into a corresponding high-precision pulse electrical signal. This signal is transmitted to the counter 2311 mounted at the rear end of the shaft frame 235 for acquisition, calculation and display. By converting the number of pulses with the pulse equivalent calibrated according to the circumference of the measuring wheel 236, the accurate measurement value of the cable length is finally output in real time.

[0026] Specifically, the unwinding assembly 21 also includes a power unit 2110 mounted on the base 211 for driving the spindle 212 to rotate. A brake disc 2111 is fixed at the rear end of the spindle 212, and an electromagnetic brake 2112 is mounted at the rear end of the base 211.

[0027] In this embodiment, the power unit 2110 provides active and controllable rotational power for the entire unwinding process, directly driving the main shaft 212 to rotate at a set speed, thereby driving the drum to unwind the cable. The brake disc 2111 fixed to the rear end of the main shaft 212 and the electromagnetic brake 2112 correspondingly installed at the rear end of the base 211 together constitute a fast-response braking unit. When an emergency stop is required or the unwinding is completed, the electromagnetic brake 2112 is energized to generate braking force and acts on the brake disc 2111, which can instantly suppress the rotational inertia of the main shaft 212 and the entire unwinding drum.

[0028] The working principle and usage process of this utility model are as follows: First, the installation and fixing of the cable reel is achieved through the unwinding assembly 21. During operation, the cable reel is placed on four circumferentially distributed support plates 214. By rotating the threaded rod 218, it moves forward and backward relative to the main shaft 212, thereby driving the fixed shaft seat 217 and sleeve 215 to slide axially along the main shaft 212. The movement of the sleeve 215 is converted into radial thrust or tension on the four support plates 214 through the support rods 216 pivotally connected at its front and rear ends. This forces the four support plates 214 to expand outward or contract inward synchronously on the circular seat 213, thereby tightening or loosening the cable reel from the inside, realizing the quick clamping and disassembly of the cable reel. When the cylinder 226 extends, it pushes the shaft 222 to rotate through the support rod 225, forcing the pressure roller 224 to press down onto the cable surface, forming a controllable constraint pressure. This pressure can effectively suppress the radial runout and axial movement of the cable caused by unwinding inertia, its own rigidity, or irregularity of the reel, ensuring that the cable is always confined within the predetermined path and transported smoothly, thereby providing a stable and undisturbed material flow for the subsequent length measurement process. After the cable is drawn out from the unwinding assembly 21 and initially straightened by the anti-deviation assembly 22, it is precisely guided into the measurement area of ​​the limiting assembly 23. Its specific path is constrained from above by two limiting wheels 233 arranged on the left and right sides of the front end of the upright frame 232 on the mounting base 231, thereby ensuring that the cable is vertically guided to the upper surface of the measuring wheel 236 directly below. At this time, under the constant upper pressure provided by the spring 239 through the guide rod 238 acting on the limiting block 237, the entire shaft frame 235 swings upward around its pivot point, causing the measuring wheel 236 to press the cable upward, and finally the cable is stably clamped in the stable measurement channel formed by the two upper limiting wheels 233 and the lower measuring wheel 236. This eliminates the radial runout and axial movement of the cable, and ensures that the measuring wheel 236 rotates synchronously without slippage under the friction drive of the cable. When the measuring wheel 236 rotates precisely without slippage, this rotational motion is captured in real time by the rotary encoder 2310, which is directly coaxially mounted with the measuring wheel 236, and converted into a corresponding high-precision pulse electrical signal. This signal is transmitted to the counter 2311 mounted at the rear end of the shaft frame 235 for acquisition, calculation and display. By converting the number of pulses with the pulse equivalent calibrated according to the circumference of the measuring wheel 236, the accurate measurement value of the cable length is finally output in real time.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power cable length metering detection device comprising a base (1), characterized in that: The base (1) is provided with a detection mechanism (2) for measuring and detecting cable length. The detection mechanism (2) includes: An unwinding assembly (21) is mounted on a base (1) and is used for unwinding the cable; Anti-deviation component (22) is installed on unwinding component (21) and used to prevent deviation during cable unwinding process; The limiting component (23) includes a mounting base (231) fixed to the top front end of the base (1). A stand (232) is fixed to the top rear end of the mounting base (231). Limiting wheels (233) are rotatably installed on the left and right sides above the front end of the stand (232). A base (234) is fixed to the top front end of the mounting base (231). A shaft frame (235) is pivotally connected to the upper left side of the base (234). A measuring wheel (236) is rotatably installed inside the upper end of the shaft frame (235). Limiting blocks (237) are rotatably installed on the outer walls of the front and rear ends of the shaft frame (235). Guide rods (238) are pivotally connected to the front and rear sides of the right end of the base (234). The upper end of the guide rod (238) is slidably installed through the limiting block (237). A spring (239) is sleeved on the outside of the guide rod (238).

2. A power cable length metering detection device according to claim 1, characterized in that: The unwinding assembly (21) includes a base (211) fixed to the top rear end of the base (1). A main shaft (212) is rotatably installed between the front and rear ends inside the base (211). A round seat (213) is fixed to the outer wall of the main shaft (212). Four circumferentially distributed support plates (214) are slidably installed at the front end of the round seat (213). A sleeve (215) is slidably installed at the front end of the main shaft (212). Four circumferentially distributed support rods (216) are pivotally connected to the outer walls of both the front and rear ends of the sleeve (215). The other end of the support rod (216) is pivotally connected to the support plate (214). A shaft seat (217) is fixed to the front end of the sleeve (215). A threaded rod (218) is rotatably installed through the shaft seat (217). The threaded rod (218) is threadedly installed to the main shaft (212).

3. The power cable length measuring and testing device according to claim 2, characterized in that: The unwinding assembly (21) also includes guide wheels (219) that are rotatably mounted on both sides of the outer wall of the rear end of the support plate (214).

4. A power cable length metering detection device according to claim 2, characterized in that: The anti-deviation assembly (22) also includes an extension frame (221) fixed to the outer wall of the left side of the base (211). A shaft (222) is rotatably installed at the upper end of the extension frame (221). A support arm (223) is fixed at the front end of the shaft (222). A pressure roller (224) is rotatably installed inside the support arm (223). A support rod (225) is fixed to the outer wall of the shaft (222). A cylinder (226) is pivotally connected to the lower end of the extension frame (221), and the output end of the cylinder (226) is pivotally connected to the support rod (225).

5. The power cable length measuring and testing device according to claim 1, characterized in that: The limiting component (23) also includes a rotary encoder (2310) installed at the front end of the shaft frame (235) and coaxially installed with the measuring wheel (236), and a counter (2311) is installed at the rear end of the shaft frame (235).

6. A power cable length metering detection device according to claim 2, characterized in that: The unwinding assembly (21) also includes a power unit (2110) mounted on the base (211) and used to drive the spindle (212) to rotate. A brake disc (2111) is fixed at the rear end of the spindle (212), and an electromagnetic brake (2112) is mounted at the rear end of the base (211).

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