Lightweight sample preparation device for power cable

Abstract

The invention provides a power cable lightweight sample preparation device, and relates to the technical field of power cable sample preparation, the power cable lightweight sample preparation device comprises a mobile frame, and the upper end of the mobile frame is provided with a calibration assembly; the calibration assembly comprises a left three-jaw chuck, a right three-jaw chuck and a calibration chuck, the left three-jaw chuck is fixedly installed on the left side of the upper end of the movable frame, the right three-jaw chuck is fixedly installed on the right side of the upper end of the movable frame, and the calibration chuck is movably installed in the middle of the upper end of the movable frame; a fixing base is arranged in the middle of the upper end of the movable frame. The compact portable sample preparation device provided by the invention is convenient for a worker to carry and operate, and in addition, the calibration assembly is arranged, so that a cable can be calibrated in real time, the cable is prevented from inclining in the cutting process, a cable core is prevented from being damaged, the cable is always located on the center line, and the production efficiency is improved. And the high-precision straightening of the cable is realized, so that the stability and the accuracy of subsequent cutting operation are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of power cable sample preparation, in particular to a power cable lightweight sample preparation device. Background Art

[0002] Power cables are used to transmit and distribute electric energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. Power cables are used to transmit and distribute high-power electric energy in the trunk lines of the power system, including power cables of various voltage levels and various insulations of 1-500kV and above. The basic structure of power cables consists of four parts: core (conductor), insulation layer, shielding layer and protective layer. Cables are a type of power or signal transmission equipment, usually composed of several or several groups of wires. Each group of wires is insulated from each other and often twisted around a center. The entire outside is covered with a highly insulating covering layer. Cables have the characteristics of internal power supply and external insulation.

[0003] In the actual cable sampling process, the traditional method is to manually use tools such as wire strippers to make cable samples. This is not only time-consuming and inefficient, but is also often limited by the operator's skill level and physical condition, which can easily cause damage to the cable core and make it difficult to ensure the consistency and accuracy of the samples.

[0004] In order to solve the above problems, we propose a lightweight sample preparation device for power cables to solve the above problems. Summary of the invention

[0005] In order to solve the problems in the background technology, the present invention provides a lightweight sample preparation device for power cables.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A lightweight sample preparation device for power cables comprises a mobile frame, wherein a calibration component is arranged at the upper end of the mobile frame; The calibration assembly comprises a left three-jaw chuck, a right three-jaw chuck and a calibration chuck, wherein the left three-jaw chuck is fixedly mounted on the left side of the upper end of the moving frame, the right three-jaw chuck is fixedly mounted on the right side of the upper end of the moving frame, and the calibration chuck is movably mounted on the middle part of the upper end of the moving frame; a fixed seat is arranged in the middle part of the upper end of the moving frame, the calibration chuck is mounted in the middle part of the left end of the fixed seat, a sliding plate is arranged in the middle part of the bottom end of the fixed seat, a driving assembly is arranged in the middle part of the bottom end of the sliding plate, and the driving assembly is used to drive the sliding plate to slide horizontally in the middle part of the upper end of the moving frame; Preferably, a cutting assembly is provided in the middle of the right end of the fixed seat, and the cutting assembly includes a driving gear, and a cutting frame is provided on the right end face of the driving gear, and the driving gear is used to drive the cutting frame to rotate, and a knife frame is movably installed on the right end of the cutting frame, and a blade is installed in the middle of the knife frame; and an adjusting assembly is provided at the left end of the cutting frame, and the adjusting assembly is used to drive the blade to move in the horizontal direction.

[0007] Preferably, the tool feed detection assembly comprises an electric ejector pin, and the electric ejector pin is arranged in the middle of the right end of the right three-jaw chuck.

[0008] Preferably, the adjustment component includes an adjustment motor, which is fixedly mounted in the middle of the upper end of the cutting frame, the output end of the adjustment motor is transmission-connected with a main gear, the side end of the main gear is meshingly connected with a sub-gear, the middle of the sub-gear is connected with an adjustment screw, the adjustment screw is movably mounted in the middle of the bottom end of the cutting frame, and the adjustment screw is movably connected to the bottom of the tool holder.

[0009] Preferably, a guide rod is provided in the middle of the upper end of the cutting frame, and the guide rod is slidably connected to the top of the knife holder.

[0010] Preferably, a driving motor is fixedly installed in the middle of the side end of the fixing seat, and a transmission gear is provided at the output end of the driving motor. The transmission gear is meshed with the driving gear, and the driving motor is used to drive the driving gear and the transmission gear to rotate.

[0011] Preferably, the driving assembly comprises a ball screw, which is movably mounted at the middle of the upper end of the moving frame, and the bottom of the sliding plate is slidably connected to the ball screw via a threaded sleeve.

[0012] Preferably, sliding blocks are installed on both sides of the bottom end of the sliding plate, and guide rails are slidably installed on the bottom of the sliding blocks. The guide rails are located at both ends of the ball screw and are fixedly installed on the upper end surface of the moving frame.

[0013] Preferably, a stepper motor is installed on the left side of the upper end of the movable frame, and synchronous wheels are provided at the output end of the stepper motor and the left end of the ball screw, and the two sets of synchronous wheels are connected by a synchronous belt.

[0014] Preferably, a storage rack is provided on the left side of the bottom end of the movable frame, and a pull rod is movably installed on the inner middle part of the storage rack.

[0015] Preferably, a protective shell is provided on the upper end surface of the movable frame, and a movable door is provided at the right end of the protective shell.

[0016] Preferably, the fixing seat is configured as a hollow structure, and the centers of the left three-jaw chuck, the right three-jaw chuck, the fixing seat and the calibration chuck are in the same horizontal plane.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a compact and lightweight sample preparation device, which is convenient for workers to carry and operate. In addition, by providing a calibration component, the two ends of the cable can be clamped and fixed by a left three-jaw chuck and a right three-jaw chuck. Then, during the cutting process, the calibration chuck follows the cutting component to move in real time, so that the cable can be calibrated in real time, so as to avoid the cable from tilting during the cutting process, resulting in damage to the cable core, so that the cable is always on the center line, and the cable is straightened with high precision, thereby ensuring the stability and accuracy of subsequent cutting operations. In the present invention, under the action of clamping and fixing the cable by the calibration component, the cutting frame is driven by the driving gear to rotate, so that the blade rotates and cuts the cable, ensuring that the blade always maintains accurate positioning of the cable during the rotation process, which not only improves the cutting accuracy, but also makes the entire cutting process more stable and efficient, thereby effectively improving the accuracy and efficiency of cable sample preparation; In the present invention, a feed detection component is provided, including an electric ejector, through which the cable core can be energized, and a voltage sensor can be used to detect the penetration depth of the blade. Once the blade approaches the insulating layer of the cable, the voltage sensor will be triggered, and the position of the blade needs to be adjusted to avoid the blade piercing the insulating layer and causing damage to the cable core, thereby effectively improving the accuracy and quality of cutting and sampling of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the internal structure of the present invention; Figure 2 It is a schematic diagram of the structure of the cutting assembly in the present invention; Figure 3 It is a schematic diagram of the overall structure of the present invention; Figure 4 It is a schematic diagram of the bottom structure of the device of the present invention; Figure 5 It is a rear view of the present invention.

[0019] In the figure: 1. moving frame; 11. protective shell; 111. movable door; 12. pull rod; 13. storage rack; 2. left three-jaw chuck; 3. right three-jaw chuck; 31. electric ejector; 4. sliding plate; 41. ball screw; 42. guide rail; 43. sliding block; 44. stepping motor; 45. synchronous belt; 5. fixed seat; 6. calibration chuck; 7. driving gear; 71. driving motor; 72. transmission gear; 8. cutting frame; 81. adjusting motor; 82. main gear; 83. sub gear; 84. adjusting screw; 85. guide rail; 86. tool holder; 87. blade. DETAILED DESCRIPTION

[0020] During actual use on site, workers often need to carry equipment to the site for use. For this reason, we propose a lightweight sample preparation device for power cables. The device of the present invention has the characteristics of portability. To achieve this goal, we strictly control the overall size and weight of the device. The overall size is designed to be compact and reasonable to ensure that operators can easily hold and move the device. At the same time, the total weight of the equipment is strictly controlled within a certain weight, which is convenient for single-person operation and carrying.

[0021] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: Example 1: Reference Figure 1 - Figure 5 As shown, a lightweight sample preparation device for a power cable in this embodiment comprises a mobile frame 1, and a calibration component is arranged at the upper end of the mobile frame 1; The calibration assembly includes a left three-jaw chuck 2, a right three-jaw chuck 3 and a calibration chuck 6. The left three-jaw chuck 2 is fixedly mounted on the left upper end of the mobile frame 1, the right three-jaw chuck 3 is fixedly mounted on the right upper end of the mobile frame 1, and the calibration chuck 6 is movably mounted in the middle of the upper end of the mobile frame 1, and the calibration chuck 6 is also set as a three-jaw structure.

[0022] Among them, the two ends of the cable can be clamped and fixed by the left three-jaw chuck 2 and the right three-jaw chuck 3, and then, during the cutting process, the cable can be calibrated in real time by real-time movement of the calibration chuck 6, so that the cable is always on the center line, thereby improving the accuracy of cutting and peeling the cable, avoiding tilting of the cable and causing damage to the cable core, ensuring the stability of the cable during the clamping process, and being able to intelligently adapt to cables of different specifications.

[0023] Example 2: Reference Figure 1 - Figure 5 As shown, based on Example 1, a lightweight sample preparation device for power cables also includes the following structure: A fixed seat 5 is provided in the middle of the upper end of the mobile frame 1, and a calibration chuck 6 is installed in the middle of the left end of the fixed seat 5. A sliding plate 4 is provided in the middle of the bottom end of the fixed seat 5. A driving assembly is provided in the middle of the bottom end of the sliding plate 4. The driving assembly is used to drive the sliding plate 4 to slide horizontally in the middle of the upper end of the mobile frame 1. A cutting assembly is arranged at the middle part of the right end of the fixed seat 5, and the cutting assembly includes a driving gear 7. A cutting frame 8 is arranged on the right end face of the driving gear 7, and the driving gear 7 is used to drive the cutting frame 8 to rotate. A knife frame 86 is movably installed at the right end of the cutting frame 8, and a blade 87 is installed in the middle part of the knife frame 86; and, an adjusting assembly is arranged at the left end of the cutting frame 8, and the adjusting assembly is used to drive the blade 87 to move in the horizontal direction.

[0024] Among them, the adjustment component includes an adjustment motor 81, which is fixedly installed in the middle of the upper end of the cutting frame 8. The output end of the adjustment motor 81 is transmission-connected with a main gear 82, and the side end of the main gear 82 is meshingly connected with a sub-gear 83. The middle part of the sub-gear 83 is connected with an adjustment screw rod 84, which is movably installed in the middle of the bottom end of the cutting frame 8, and the adjustment screw rod 84 is movably connected to the bottom of the tool holder 86.

[0025] By starting the adjustment motor 81, the main gear 82 can be driven to rotate, thereby driving the sub-gear 83 to rotate, thereby driving the adjustment screw 84 to rotate, and since the adjustment screw 84 is connected to the bottom of the knife holder 86, the knife holder 86 is driven to slide horizontally under the rotation of the adjustment screw 84. When the knife holder 86 slides inward, the blade 87 can penetrate into the outer skin of the cable. Then, the driving gear 7 is started to drive the cutting frame 8 to rotate, thereby realizing the cutting and peeling of the outer skin of the cable. Furthermore, during the cutting process, the driving assembly drives the sliding plate 4 to slide in the horizontal direction, thereby realizing moving and rotating cutting of the cable.

[0026] In some examples, a guide rod 85 is provided in the middle of the upper end of the cutting frame 8, and the guide rod 85 is slidably connected to the top of the tool holder 86. The guide rod 85 mainly guides and limits the sliding of the tool holder 86, so that the tool holder 86 can slide stably in the horizontal direction.

[0027] In some examples, a drive motor 71 is fixedly installed in the middle of the side end of the fixed seat 5, and a transmission gear 72 is provided at the output end of the drive motor 71. The transmission gear 72 is meshed and connected with the drive gear 7. The drive motor 71 is used to drive the drive gear 7 and the transmission gear 72 to rotate. Starting the drive motor 71 drives the transmission gear 72 to rotate, thereby driving the drive gear 7 to rotate, thereby driving the cutting frame 8 to rotate.

[0028] In some examples, the driving assembly includes a ball screw 41, which is movably mounted in the middle of the upper end of the moving frame 1. The bottom of the sliding plate 4 is slidably connected to the ball screw 41 through a threaded sleeve. A stepper motor 44 is installed on the left side of the upper end of the moving frame 1. Synchronous wheels are provided at the output end of the stepper motor 44 and the left end of the ball screw 41. The two sets of synchronous wheels are connected through a synchronous belt 45.

[0029] The stepping motor 44 is started, and the ball screw 41 is driven to rotate under the transmission of the synchronous belt 45 and the synchronous wheel, thereby driving the sliding plate 4 to slide in the horizontal direction.

[0030] In some examples, sliding blocks 43 are installed on both sides of the bottom end of the sliding plate 4, and guide rails 42 are slidably installed at the bottom of the sliding block 43. The guide rails 42 are located at both ends of the ball screw 41 and are fixedly installed on the upper end surface of the moving frame 1. The sliding blocks 43 and the guide rails 42 mainly play a role of stabilizing support for the sliding of the sliding plate 4, thereby improving the stability and accuracy of the sliding plate 4 when sliding in the horizontal direction.

[0031] In some examples, the fixing seat 5 is configured as a hollow structure, and the centers of the left three-jaw chuck 2, the right three-jaw chuck 3, the fixing seat 5 and the calibration chuck 6 are in the same horizontal plane, thereby improving the stability of the cable in the center position and preventing the cable from being offset during the cutting process, causing the blade 87 to damage the cable core.

[0032] Example 3: Reference Figure 1 - Figure 5 As shown, based on Embodiment 1-2, a lightweight sample preparation device for a power cable also includes the following structure: The tool feed detection component includes an electric ejector pin 31, which is arranged at the middle of the right end of the right three-jaw chuck 3. When the cable is clamped and fixed, the head end of the cable needs to contact the electric ejector pin 31, and the cable core can be energized through the electric ejector pin 31; Among them, a high-precision and high-sensitivity voltage measurement circuit is constructed through the voltage sensor, the electric ejector pin 31 and the blade 87. The circuit is cleverly connected to the blade 87, the cable core and the tail electric ejector pin 31 through a sampling isolation circuit to form a closed-loop monitoring system; it ensures that the voltage sensor can collect the tiny voltage changes of the cable core in real time and accurately. When the blade 87 penetrates the outer skin of the cable and approaches the insulation layer, it will trigger the voltage sensor. At this time, the control system will send a signal to stop the operation of the adjustment component, thereby effectively preventing the blade 87 from continuing to extend and causing damage to the cable core; in addition, during the cutting process, the position of the blade 87 will also be detected in real time. When the blade 87 approaches the insulation layer and triggers the voltage sensor, the adjustment component will start immediately to adjust the position of the blade 87 to prevent the blade 87 from damaging the cable core.

[0033] In the present invention, the principle of tiny voltage monitoring is mainly based on Ohm's law, that is, when current passes through a resistor, a voltage drop will be generated, and the current is proportional to the voltage. Therefore, by connecting a high-precision resistor (also called a shunt or sampling resistor) in series in the circuit, the weak current can be converted into a measurable voltage signal. Then, the voltage measurement circuit or data acquisition system is used to collect and process this voltage signal, thereby realizing the measurement and monitoring of the weak current. This is an existing mature technology and will not be described in detail.

[0034] Example 4: Reference Figure 1 - Figure 5 As shown, based on embodiments 1-3, a lightweight sample preparation device for power cables also includes the following structure: A storage rack 13 is provided on the left side of the bottom end of the mobile frame 1, and a pull rod 12 is movably installed on the inner middle part of the storage rack 13. The pull rod 12 can be pulled out from the storage rack 13, so that it is convenient for the staff to pull the pull rod 12 to drive the mobile frame 1 to move, providing convenience for the movement and transportation of the sample preparation device. Conversely, the pull rod 12 can be put into the storage rack 13 for storage, so as to avoid the pull rod 12 being exposed to the outside during use and hindering the installation of the cable.

[0035] A protective shell 11 is disposed on the upper end surface of the movable frame 1 , and a movable door 111 is disposed on the right end of the protective shell 11 . The movable door 111 is opened to facilitate the installation or removal of the cable by the staff.

[0036] The working principle of the present invention is: In actual use, the mobile frame 1 is first moved to a designated position by the pull rod 12 for parking and fixing; Then the staff opens the movable door 111, and inserts the cable into the left three-jaw chuck 2, the calibration chuck 6, and the right three-jaw chuck 3 in sequence. During the installation of the cable, the head end of the cable core needs to contact the electric ejector 31 at the right end of the right three-jaw chuck 3, so that the electric ejector 31 can energize the cable core. After the cable is installed, the left three-jaw chuck 2 and the right three-jaw chuck 3 are started at the same time, so that the two ends of the cable are clamped and fixed. During the cable cutting process, the calibration chuck 6 is started to limit the cable so that the cable is kept in the center position, and then the adjustment motor 81 is started, and the main gear 82 is driven to rotate by the adjustment motor 81, thereby driving the sub-gear 83 to rotate, and the sub-gear 83 can drive the adjustment screw rod 84 to rotate, thereby driving the tool holder 86 to move toward the center direction, so that the blade 87 penetrates the outer skin of the cable. Since the cable core and the electric ejector 31 are energized, when the blade 87 approaches the insulation layer of the cable, the voltage sensor will be triggered, and the control system will receive the circuit signal and issue a command to stop the adjustment component and maintain the penetration depth of the blade 87. Then, the driving motor 71 is started, driving the transmission gear 72 to rotate, thereby driving the driving gear 7 to rotate, and the driving gear 7 can drive the cutting frame 8 to rotate, thereby driving the blade 87 to rotate and cut the cable; At the same time, during the cutting process, the stepper motor 44 is started, and under the transmission of the synchronous belt 45, the ball screw 41 is driven to rotate, thereby driving the sliding plate 4 to move horizontally. When the sliding plate 4 slides from right to left, it drives the blade 87 to rotate and cut all the way from right to left, thereby realizing fast and accurate cutting and peeling of the cable line, thereby improving the efficiency of making cable samples.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lightweight sample preparation device for power cables, characterized in that: It comprises a mobile frame (1), wherein a calibration component is provided at the upper end of the mobile frame (1); The calibration assembly comprises a left three-jaw chuck (2), a right three-jaw chuck (3) and a calibration chuck (6); the left three-jaw chuck (2) is fixedly mounted on the left side of the upper end of the moving frame (1); the right three-jaw chuck (3) is fixedly mounted on the right side of the upper end of the moving frame (1); and the calibration chuck (6) is movably mounted on the middle part of the upper end of the moving frame (1); A fixed seat (5) is arranged in the middle of the upper end of the movable frame (1), the calibration chuck (6) is mounted in the middle of the left end of the fixed seat (5), a sliding plate (4) is arranged in the middle of the bottom end of the fixed seat (5), and a driving component is arranged in the middle of the bottom end of the sliding plate (4), the driving component is used to drive the sliding plate (4) to slide horizontally in the middle of the upper end of the movable frame (1); A cutting assembly is arranged at the middle of the right end of the fixing seat (5), the cutting assembly comprising a driving gear (7), a cutting frame (8) is arranged at the right end surface of the driving gear (7), the driving gear (7) is used to drive the cutting frame (8) to rotate, a knife frame (86) is movably mounted at the right end of the cutting frame (8), and a blade (87) is mounted at the middle of the knife frame (86); Furthermore, an adjustment component is provided at the left end of the cutting frame (8), and the adjustment component is used to drive the blade (87) to move in a horizontal direction; A tool feed detection component, the tool feed detection component comprising an electric ejector pin (31), the electric ejector pin (31) being arranged at the middle of the right end of the right three-jaw chuck (3).

2. A power cable lightweight sample preparation device according to claim 1, characterized in that: The adjustment assembly comprises an adjustment motor (81), the adjustment motor (81) being fixedly mounted at the middle of the upper end of the cutting frame (8), the output end of the adjustment motor (81) being transmission-connected to a main gear (82), the side end of the main gear (82) being meshingly connected to a sub-gear (83), the middle of the sub-gear (83) being connected to an adjustment screw rod (84), the adjustment screw rod (84) being movably mounted at the middle of the bottom end of the cutting frame (8), and the adjustment screw rod (84) being movably connected to the bottom of the knife frame (86).

3. A power cable lightweight sample preparation device according to claim 2, characterized in that: A guide rod (85) is provided in the middle of the upper end of the cutting frame (8), and the guide rod (85) is slidably connected to the top of the knife frame (86).

4. A power cable lightweight sample preparation device according to claim 3, characterized in that: A driving motor (71) is fixedly mounted at the middle of the side end of the fixing seat (5); a transmission gear (72) is provided at the output end of the driving motor (71); the transmission gear (72) is meshedly connected with the driving gear (7); and the driving motor (71) is used to drive the driving gear (7) and the transmission gear (72) to perform rotational motion.

5. A power cable lightweight sample preparation device according to claim 4, characterized in that: The driving assembly comprises a ball screw (41), the ball screw (41) being movably mounted at the middle of the upper end of the moving frame (1), and the bottom of the sliding plate (4) being slidably connected to the ball screw (41) via a threaded sleeve.

6. A power cable lightweight sample preparation device according to claim 5, characterized in that: Sliding blocks (43) are installed on both sides of the bottom end of the sliding plate (4), and guide rails (42) are slidably installed on the bottom of the sliding block (43). The guide rails (42) are located at both ends of the ball screw (41) and are fixedly installed on the upper end surface of the moving frame (1).

7. A power cable lightweight sample preparation device according to claim 6, characterized in that: A stepper motor (44) is installed on the left side of the upper end of the moving frame (1), and synchronous wheels are arranged at the output end of the stepper motor (44) and the left end of the ball screw (41), and the two sets of synchronous wheels are connected in transmission via a synchronous belt (45).

8. A power cable lightweight sample preparation device according to claim 7, characterized in that: A storage rack (13) is provided on the left side of the bottom end of the movable frame (1), and a pull rod (12) is movably mounted on the inner middle portion of the storage rack (13).

9. A power cable lightweight sample preparation device according to claim 8, characterized in that: The upper end surface of the movable frame (1) is provided with a protective shell (11), and the right end of the protective shell (11) is provided with a movable door (111).

10. A power cable lightweight sample preparation device according to claim 9, characterized in that: The fixing seat (5) is configured as a hollow structure, and the centers of the left three-jaw chuck (2), the right three-jaw chuck (3), the fixing seat (5) and the calibration chuck (6) are located in the same horizontal plane.

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