CN115541381A - Withstand voltage test mechanism for detecting low-voltage power cable and overhead insulated cable - Google Patents

Abstract

The invention discloses a withstand voltage test mechanism for detecting low-voltage power cables and overhead insulated cables, relates to the technical field of cable withstand voltage tests, and includes an operating table, an installation frame installed on the top of the operation table, and a drive box arranged on the top of the installation frame , the lower part of the fixed frame and the notch of the lifting plate are equipped with a cross frame, and the four ends of the cross frame are respectively installed with arc surface pressure rollers, groove pressure rollers, plane breakpoint pressure rollers and arc surface breakpoint pressure rollers. roller; the top of the lifting plate is provided with a pressurizing component; the inside of the driving box is provided with a lifting component; Pressure test, which is convenient for the test operation of four different pressurized contact areas on the cable, and through the cooperation of the lifting component and the positioning component, it is convenient to test the withstand voltage effect of the cable for dynamic repeated impact, which is convenient for further improving the detection of the cable withstand voltage effect of precision.

Description

A pressure test mechanism for detecting low-voltage power cables and overhead insulated cables

technical field

The invention relates to the technical field of cable withstand voltage test, in particular to a withstand voltage test mechanism for detecting low-voltage power cables and overhead insulated cables.

Background technique

A cable is made of one or more mutually insulated conductors and an outer insulating protective layer. It is a wire that transmits power or information from one place to another. It is usually a similar rope twisted by several or several groups of wires. Each group of wires is insulated from each other, and is often twisted around a center, and the entire outer surface is covered with a highly insulating covering layer. The cable has the characteristics of internal energization and external insulation;

Both low-voltage power cables and overhead insulated cables are one of the cables. Low-voltage power cables and overhead insulated cables need to be tested with a withstand voltage test device to ensure that the laid cables can be used safely. During the deformation test, the cable is mainly tested by means of static pressure, which is inconvenient to apply pressure at intervals on the surface of the cable, resulting in inaccurate data of the measured cable withstand voltage effect, which affects the performance of the cable. The correct judgment of the pressure resistance effect; therefore, the above problems need to be improved.

Contents of the invention

The purpose of the present invention is to solve the shortcomings in the prior art, and propose a withstand voltage test mechanism for detecting low-voltage power cables and overhead insulated cables.

In order to achieve the above object, the present invention adopts the following technical scheme: a pressure-resistant test mechanism for detecting low-voltage power cables and overhead insulated cables, including an operating table, a mounting frame installed on the top of the operating table, and a drive on the top of the mounting frame. box, the top surface of the operating table is vertically fixed with a fixed frame, both sides of the top surface of the operating table are installed with a reel, and the upper part of the fixed frame slides vertically and is provided with an inverted U-shaped lifting plate, the lower part of the fixed frame and the notch of the lifting plate are longitudinally rotated with a cross frame, and the four ends of the cross frame are respectively installed with arc surface pressure rollers, groove pressure rollers, and plane breakpoint pressure rollers. Roller and arc break point pressure roller;

Both the arc surface pressure roller and the groove pressure roller have a cylindrical roller structure, and the outer end faces of the plane breakpoint pressure roller and the arc surface breakpoint pressure roller are both planar pressure roller structures, and the plane A plurality of longitudinal trapezoidal beadings are equidistantly arranged on the outer end surface of the breakpoint pressure roller, and a plurality of longitudinal triangular beadings are equidistantly arranged on the outer end surface of the arc-shaped breakpoint pressing roller, and the outer surface of the triangular beading The end edges are arc-shaped;

The top of the lifting plate is provided with a pressurized assembly for cable withstand voltage detection; the interior of the drive box is provided with a lifting assembly for the free fall of the lifting plate; The through opening in the inner circle of the frame, the inside of the through opening is vertically movable with a stabilizing column, the inside of the mounting frame on both sides of the through opening is provided with a positioning cavity, and the inside of the positioning cavity is provided with a limiter for the use of the stabilizing column. bit positioning components.

Preferably, the pressurizing assembly includes a fixed plate fixed on the upper part of both sides of the lifting plate, an electric push cylinder fixed vertically on the top of the fixed plate, a lifting plate installed in the lower part of the driving box for horizontal movement, and a fixed column set on the stabilizing column. The installation cavity in the upper part, the servo motor located in the installation cavity, the storage cavity opened in the lower part of the stabilizing column, the vertically movable push column inside the storage cavity and the vertically rotating wire set on the top surface of the storage cavity Rod, the top of the lead screw is fixed coaxially with the drive shaft of the servo motor; the bottom end of the pushing column moves out of the storage chamber and is fixedly connected to the top surface of the lifting plate; the top of the pushing column There is a threaded hole to match with the lead screw vertically on the surface; stable openings are vertically opened on both sides of the top surface of the installation frame, and the electric push cylinder is extended from the stable opening, and the telescopic movement of the electric push cylinder The top of the end is affixed to the bottom surface of the lifting plate.

Preferably, the lifting assembly includes a fixed frame vertically arranged on both sides inside the drive box, a sprocket arranged at the upper and lower ends of the fixed frame for longitudinal rotation, and a chain inserted between the upper and lower sprockets. One side is provided with a driving motor, the motor shaft front end of the driving motor is equipped with a driving pulley, and the front end of the sprocket shaft of the lower sprocket of the fixed frame is fixedly sleeved with a driven pulley, and the driving pulley and the driven belt There is a transmission belt between the wheels; the outer sides of the two chains are longitudinally provided with lifting jacks, and the front and rear ends of the outer sides of the lifting jacks are fixedly connected with fixed rods, and the outer ends of the fixed rods are connected with the pins on the chains. The end of the shaft is fixedly connected; the suspended end surface of the lifting mandrel is arc-shaped.

Preferably, the positioning assembly includes a positioning plug horizontally movable inside the positioning cavity, an electric push rod fixed laterally on the inner wall of the positioning cavity, and positioning grooves provided on both sides of the outer wall of the stabilizing column, the electric push rod The telescopic end is fixedly connected to the outer end surface of the positioning insert, and the inner end of the positioning insert moves through the opening and abuts against the positioning groove of the stabilizing column; the edge of the inner end of the positioning insert is an arc surface shape.

Preferably, a movable box is provided on the front surface of the fixed frame, a locking box is fixedly connected to the lower part of the front surface of the fixed frame, a rectangular bar opening is vertically opened on the front surface of the fixed frame, and the lift The lower part of the front end of the plate is longitudinally provided with a connecting plate fixedly connected to the rear end of the movable box, the front end of the cross frame shaft in the notch of the lifting plate moves through the inside of the movable box, and the front end of the cross frame shaft in the lower part of the fixed frame moves Penetrates inside the lock box.

Preferably, the front ends of the rotating shafts of the two cross frames are fixedly sleeved with worm gears, and the upper part of the movable box and the lower part of the lock box are both horizontally rotated and provided with a worm gear meshed with the worm gear, and one end of the worm The activity runs through the outside of the box and is fixed with a hand wheel.

Compared with the prior art, the beneficial effect of the present invention is: the present invention facilitates the static pressurization test on the cable through the cooperation of the lifting plate with the two cross frames and the pressurization assembly, and facilitates four different pressurization tests on the cable The test operation of the contact area is convenient to select different pressure rollers for the test operation according to the pressure surface required by the cable, and through the cooperation of the lifting component and the positioning component, it is convenient to test the pressure resistance effect of the cable for dynamic repeated impact, which is convenient for further Improve the accuracy of the cable withstand voltage effect test, and effectively improve the efficiency and convenience of the cable withstand voltage effect test.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is a cross-sectional view of the mounting frame structure of the present invention;

Fig. 3 is a structural sectional view of the fixed frame and the drive box of the present invention;

Fig. 4 is a cross-sectional view of the structure of the lifting plate and the stabilizing column of the present invention;

Fig. 5 is a cross-sectional view of the partial structure of the installation frame and the drive box of the present invention.

Serial numbers in the figure: 1. Operating table; 2. Mounting frame; 3. Fixed frame; 4. Rewinding drum; 5. Lifting plate; 6. Cross frame; 7. Arc roller; 8. Groove roller; 9 1. Plane breakpoint pressure roller; 10. Arc surface breakpoint pressure roller; 11. Electric cylinder; 12. Lifting plate; 13. Stability column; 14. Servo motor; 15. Lead screw; 16. Push column; 18, electric push rod; 19, fixed frame; 20, sprocket; 21, chain; 22, driving motor; 23, lifting ejector rod; 24, worm wheel; 25, worm.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Embodiment: Referring to Fig. 1 to Fig. 5, a pressure test mechanism for detecting low-voltage power cables and overhead insulated cables includes an operating table 1, an installation frame 2 installed on the top of the operation table 1, and a Drive box, the top surface of the console 1 is vertically fixed with a fixed frame 3, and both sides of the top surface of the console 1 are installed with a reel 4, and the upper part of the fixed frame 3 slides vertically and is provided with an inverted U-shaped lift The plate 5, the lower part of the fixed frame 3 and the notch of the lifting plate 5 are all longitudinally rotated to be provided with a cross frame 6, and the four ends of the cross frame 6 are respectively installed with arc surface pressure rollers 7, groove pressure rollers 8, and plane rollers. Breakpoint pressure roller 9 and arc surface breakpoint pressure roller 10; arc surface pressure roller 7 and groove pressure roller 8 are cylindrical roller-shaped pressure roller structures, and the plane breakpoint pressure roller 9 and arc surface breakpoint pressure roller 10 The outer end surfaces are all planar pressure roller structures, and the outer end surface of the plane breakpoint pressure roller 9 is equidistantly provided with a plurality of longitudinal trapezoidal beading, and the equidistant on the outer end surface of the arc surface breakpoint pressure roller 10 is provided with a plurality of Longitudinal triangular bead, and the outer corners of the triangular bead are arc-shaped; the top of the lifting plate 5 is provided with a pressurizing component for cable withstand voltage testing; the inside of the drive box is provided with a lifting component for the lifting plate 5 to perform free fall; The middle part of the top surface of the mounting frame 2 is vertically provided with a through hole that penetrates into the inner ring of the fixed frame 3, and the vertical movement inside the through hole is provided with a stabilizing column 13, and the inside of the mounting frame 2 on both sides of the through hole is provided with a positioning cavity. Inside the positioning cavity are all equipped with positioning components for the use of the stabilizing column 13; through the cooperation of the lifting plate 5 with the two cross frames 6 and the pressurizing component, it is convenient to carry out static pressure testing on the cable, and it is convenient to carry out four kinds of tests on the cable. The test operation of different pressure contact areas facilitates the selection of different pressure rollers for the test operation according to the pressure surface required by the cable, and through the cooperation of the lifting component and the positioning component, it is convenient to test the pressure resistance effect of the dynamic repeated impact on the cable , it is convenient to further improve the accuracy of the cable withstand voltage effect test, and effectively improve the efficiency and convenience of the cable withstand voltage effect test.

In the present invention, the pressurizing assembly includes a fixed plate fixed on the upper part of both sides of the lifting plate 5, an electric push cylinder 11 vertically fixed on the top of the fixed plate, a lifting plate 12 horizontally movable in the lower part of the drive box, and a The installation cavity in the upper part of the stabilizing column 13, the servo motor 14 located inside the installing cavity, the receiving cavity provided in the lower part of the stabilizing column 13, the vertically movable pushing column 16 located in the receiving cavity, and the vertical rotation located in the The lead screw 15 on the top surface of the storage chamber, the top of the lead screw 15 is fixed coaxially with the drive shaft of the servo motor 14; The top surface of the push column 16 is vertically provided with a threaded channel that cooperates with the leading screw 15; both sides of the mounting frame 2 top surface are vertically provided with a stabilizing port, and the electric push cylinder 11 moves out from the stabilizing port, and the electric The top of the telescopic end of the push cylinder 11 is affixed to the bottom surface of the lifting plate 12; it is convenient to carry out static pressurization operation on the cable.

In the present invention, the lifting assembly includes a fixed frame 19 vertically arranged on both sides inside the drive box, a sprocket 20 arranged at the upper and lower ends of the fixed frame 19 for longitudinal rotation, and a chain 21 sleeved between the upper and lower sprockets 20, One side of fixed mount 19 is provided with drive motor 22, and the motor shaft front end of drive motor 22 is provided with driving pulley, and the sprocket shaft front end of fixed mount 19 bottom sprocket wheels 20 is fixedly sleeved with driven pulley, and drive pulley is connected with driven pulley. A transmission belt is sleeved between the moving pulleys; the outer sides of the two chains 21 are longitudinally provided with lifting jacks 23, and the front and rear ends of the lifting jacks 23 outsides are fixedly connected with fixed rods, and the outer ends of the fixed rods are connected to the chains 21. The end of the pin shaft is affixed; the suspended end face of the lifting push rod 23 is arc-shaped, which is convenient for lifting the lifting plate 5 repeatedly.

In the present invention, the positioning assembly includes a positioning plug 17 which is movable laterally inside the positioning cavity, an electric push rod 18 fixed laterally on the inner wall of the positioning cavity, and positioning grooves provided on both sides of the outer wall of the stabilizing column 13, and the electric push rod The telescopic end of 18 is fixedly connected with the outer end face of the positioning plug 17, and the inner end of the positioning plug 17 moves through the inside of the through hole, and abuts in the positioning groove of the stabilizing column 13; the edge of the positioning plug 17 inner end is The curved surface is convenient to limit and fix the stabilizing column 13 when the cable is statically pressurized, and cancels the limiting of the stabilizing column 13 when the cable is dynamically repeatedly impacted to avoid damage to the raised lifting plate 5. limit.

In the present invention, a movable box is provided on the top of the front end of the fixed frame 3, a locking box is fixedly connected to the bottom of the front end of the fixed frame 3, and a rectangular bar opening is vertically provided on the top of the front end of the fixed frame 3. The lower part of the front end face is longitudinally provided with a connecting plate that is fixedly connected to the rear end face of the movable box. The front end of the cross frame 6 rotating shaft in the notch of the lifting plate 5 moves through the inside of the movable box, and the front end of the cross frame 6 rotating shaft in the lower part of the fixed frame 3 moves through. Inside the locking box; the front ends of the rotating shafts of the two cross frames 6 are all fixedly sleeved with worm gears 24, and the upper part of the movable box and the lower part of the locking box are all horizontally rotated and provided with a worm screw 25 for meshing transmission with the worm gear 24. One end moves through the outside of the box, and is fixedly connected with a hand wheel, which facilitates the self-locking effect on the adjusted cross frame 6 .

Working principle: In this embodiment, the present invention also proposes a method for using a withstand voltage test mechanism for detecting low-voltage power cables and overhead insulated cables, including the following steps:

Step 1: First, electrically connect the electric push cylinder 11, the servo motor 14, the electric push rod 18, and the drive motor 22 to the external control equipment through wires, and then connect the cables to be tested for withstand voltage from between the two cross frames 6 Pass through, and then select the required arc surface pressure roller 7, groove pressure roller 8, flat breakpoint pressure roller 9 or arc surface breakpoint pressure roller 10 according to the required pressure test method, two arc surface pressure rollers 7 When the two groove pressure rollers 8 are facing each other, they are used to detect the notch pressure of the cable. local pressure detection; when the pressure rollers 10 at the break point of the two arc surfaces are facing each other, the local pressure detection of the intermittent short arc surface is carried out on the cable; the worm 25 is driven to rotate by turning the hand wheel, and the meshing between the worm 25 and the worm wheel 24 is completed. Drive the cross frame 6 to rotate and change rollers;

Step 2, when carrying out static pressure detection to cable then, drive lead screw 15 to rotate by starting servomotor 14, and then through the lead screw 15 that rotates push back pushing pin 16 to descend, start electric motor when pushing pin 16 descends. Push the cylinder 11 to elongate; drive the lifting plate 5 to descend through the descending push column 16, and the decline of the lifting plate 5 is convenient to drive the curved surface pressure roller 7 installed on the notch cross frame 6 to exert pressure on the cable, and then After applying pressure to the cable for a period of time, the cable deformation data under static pressure can be measured;

Step 3, when performing static pressure detection on the cable, the electric push rod 18 at this time pushes the positioning plug 17 to be inserted into the positioning groove of the stabilizing column 13, and then when the cable is statically loaded and pressurized, the stabilizing column 13 will not lift;

Step 4, after statically pressurizing the anti-deformation effect test on the cable, the drive motor 22 is started to drive the sprocket 20 to rotate, the chain 21 is rotated by the rotation of the sprocket 20, and the chain 21 surrounds the two sprockets 20 The rotation is convenient to drive the lifting jack 23 to rise, the lifting of the lifting jack 23 is convenient to lift the lifting plate 12, and the lifting of the lifting plate 12 is convenient to drive the lifting plate 5 to rise, and then the lifting plate 5 notches are lifted. The installed cross frame 6 rises, and after the lifting jack 23 follows the chain 21 to the highest point, the lifting jack 23 will be separated from the lifting plate 12, and then the lifting plate 12 will fall back quickly under the action of gravity. Then, through the falling lifting plate 5, the arc surface pressure roller 7 can impact and press the cable, and then repeat this operation, which is convenient for retesting the pressure resistance effect of the cable under dynamic pressure, and improves the pressure test of the cable. accuracy.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (6)

1. A pressure test mechanism for detecting low-voltage power cables and overhead insulated cables, comprising an operating table (1), a mounting frame (2) installed on the top of the operating table (1) and a mounting frame (2) located on the top of the mounting frame (2). The drive box is characterized in that: the top surface of the console (1) is vertically fixed with a fixed frame (3), and both sides of the top surface of the console (1) are equipped with winding drums (4), The upper part of the fixed frame (3) is vertically slid to be provided with an inverted U-shaped lifting plate (5), and the lower part of the fixed frame (3) and the notch of the lifting plate (5) are all longitudinally rotated to be provided with a cross Frame (6), the four ends of the cross frame (6) are respectively installed with arc surface pressure roller (7), groove pressure roller (8), plane breakpoint pressure roller (9) and arc surface breakpoint Pressure roller (10); The curved surface pressure roller (7) and the groove pressure roller (8) are both cylindrical roller-shaped pressure roller structures, and the outer end surfaces of the plane break point pressure roller (9) and the arc surface break point pressure roller (10) are All are planar pressure roller structures, and the outer end surface of the said plane breakpoint pressure roller (9) is equidistantly provided with a plurality of longitudinal trapezoidal pressure strips, and the outer end surface of the said arc surface breakpoint pressure roller (10) A plurality of longitudinal triangular beadings are equidistantly arranged, and the outer corners of the triangular beddings are arc-shaped; The top of the lifting plate (5) is provided with a pressurizing assembly for cable withstand voltage detection; the inside of the drive box is provided with a lifting assembly for the lifting plate (5) to perform free fall; the top of the mounting frame (2) The middle part of the surface is vertically provided with a through hole penetrating into the inner ring of the fixed frame (3), and a stabilizing column (13) is vertically movable inside the through hole, and the inside of the mounting frame (2) on both sides of the through hole A positioning cavity is opened, and a positioning assembly for limiting the use of the stabilizing column (13) is arranged inside the positioning cavity. 2. A pressure-resistant test mechanism for detecting low-voltage power cables and overhead insulated cables according to claim 1, characterized in that: the pressurization assembly includes fixed plates fixed on the upper parts of both sides of the lifting plate (5), The electric push cylinder (11) vertically fixed on the top of the fixed plate, the lifting plate (12) which is horizontally movable in the lower part of the drive box, the installation cavity opened in the upper part of the stabilizing column (13), the installation cavity inside the Servomotor (14), the storage cavity that is opened in the lower part of the stabilizing column (13), the vertically movable push column (16) that is located inside the storage cavity and the leading screw (15) that vertically rotates and is located on the top surface in the storage cavity ), the top of the lead screw (15) is coaxially fixed with the drive shaft of the servo motor (14); The top surface is fixed; the top surface of the push column (16) is vertically provided with a threaded channel that matches the lead screw (15); both sides of the top surface of the mounting frame (2) are vertically provided with stabilizing openings , the electric push cylinder (11) is movably extended from the stabilizing mouth, and the top of the telescopic end of the electric push cylinder (11) is fixedly connected to the bottom surface of the lifting plate (12). 3. A withstand voltage test mechanism for detecting low-voltage power cables and overhead insulated cables according to claim 2, characterized in that: the lifting assembly includes fixing frames (19) vertically arranged on both sides inside the drive box, Longitudinal rotation is arranged on the sprocket (20) of the upper and lower ends of the fixed mount (19) and the chain (21) sleeved between the upper and lower sprockets (20), and one side of the fixed mount (19) is provided with a driving motor (22), the front end of the motor shaft of the driving motor (22) is equipped with a driving pulley, and the front end of the sprocket shaft of the lower sprocket (20) of the fixed frame (19) is fixedly sleeved with a driven pulley. A transmission belt is sleeved between the pulley and the driven pulley; the outer sides of the two chains (21) are longitudinally provided with lifting jacks (23), and the front and rear ends of the outer sides of the lifting jacks (23) are fixedly connected to There is a fixed rod, and the outer end of the fixed rod is affixed to the end of the pin shaft on the chain (21); the suspended end surface of the lifting push rod (23) is arc-shaped. 4. A pressure test mechanism for detecting low-voltage power cables and overhead insulated cables according to claim 1, characterized in that: the positioning assembly includes a positioning plug (17) that is movable laterally inside the positioning cavity, a lateral The electric push rod (18) fixed on the inner wall of the positioning cavity and the positioning grooves provided on both sides of the outer wall of the stabilizing column (13), the telescopic end of the electric push rod (18) and the outer end surface of the positioning plug (17) Fixed connection, the inner end of the positioning insert (17) moves through the inside of the through hole, and abuts against the positioning groove of the stabilizing column (13); the edge of the inner end of the positioning insert (17) is an arc surface shape. 5. A kind of withstand voltage test mechanism for detecting low-voltage power cables and overhead insulated cables according to claim 1, characterized in that: a movable box is arranged on the front end surface of the fixed frame (3), and the fixed frame ( 3) A locking box is fixedly connected to the lower part of the front end face, a rectangular bar opening is vertically opened on the front end face of the fixed frame (3), and a front end and a movable box are longitudinally provided on the lower part of the front end face of the lifting plate (5). The connecting plate fixed to the rear end face, the front end of the cross frame (6) rotating shaft in the notch of the lifting plate (5) moves and penetrates into the inside of the movable box, and the front end of the rotating shaft of the cross frame (6) in the lower part of the fixed frame (3) moves Penetrates inside the lock box. 6. A pressure test mechanism for detecting low-voltage power cables and overhead insulated cables according to claim 5, characterized in that: the front ends of the rotating shafts of the two cross frames (6) are fixedly sleeved with worm gears (24) , the upper part of the movable box and the lower part of the lock box are both horizontally rotated and provided with a worm (25) meshed with a worm wheel (24), and one end of the worm (25) moves through the box body and is fixed With hand wheel.

Images