Power line tensile testing machine

Abstract

The invention relates to the field of power line tensile tests, in particular to a power line tensile testing machine which comprises a panel, a plurality of fixed pipes are fixed to the top of the panel at equal intervals, movable pipes are slidably clamped to the outer sides of the bottoms of the fixed pipes, bottom covers are fixed to the bottoms of the movable pipes, and guide shafts are fixed to the bottom surfaces of the bottom covers. Gas conveying assemblies are arranged on the outer sides of the multiple fixing pipes, and a weight attaching mechanism is arranged on one side of the multiple guiding shafts. According to the invention, air is conveyed to the space between the fixed pipe and the movable pipe through the air conveying assembly, so that the power line is in a high-pressure environment, and whether the power line subjected to sudden pulling pressure test is damaged or not is conveniently judged by observing whether the air pressure of the space is reduced or not, and an air heater or an air cooler in the prior art is communicated with the air conveying assembly. High-temperature or low-temperature air is conveyed to a space between the fixed pipe and the movable pipe, so that the power line is subjected to a sudden tension test in a high-temperature or low-temperature environment.

Description

Technical Field

[0001] The invention relates to the field of power line sudden pull test, in particular to a power line sudden pull test machine. Background Art

[0002] During normal use, the power cord may be stretched due to various reasons (such as plugging and unplugging, moving equipment, etc.). If the structural design of the power cord is unreasonable or the material quality is not up to standard, it may break or break when it is suddenly stretched, thus affecting the normal operation of the equipment and even causing safety accidents. The power cord sudden pull test can simulate the stretching conditions encountered by the power cord in actual use, verify its structural strength and durability, and ensure that it will not be damaged by stretching under normal use conditions;

[0003] The sudden pull test machine in the prior art mainly suspends the power cord on the test machine, and a connecting rod is fixed at the bottom of the power cord. By releasing a weight or other heavy object from the top of the connecting rod, a vertical downward pulling force is applied to the power cord during the process of the heavy object hitting the bottom of the connecting rod, thereby realizing the sudden pull test of the power cord. Although an instantaneous pulling force can be applied to the power cord, it is not possible to conveniently determine whether the power cord is damaged during the tension test, and it is inefficient to manually check whether the outer side of the power cord is damaged.

[0004] In addition, the material properties of the power cord will change with the change of temperature. In a high temperature environment, the molecular movement in the material will intensify, which may cause the strength, toughness and other properties of the material to decrease; in a low temperature environment, the material may become brittle and more prone to breakage. Most power cord pull testers make it difficult to arrange the power cord under different working conditions for pull test, which is not conducive to improving the accuracy of the power cord pull test results. Summary of the invention

[0005] The object of the present invention is to provide a power line sudden pull tester to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A power line sudden pull tester, comprising:

[0008] A frame, the frame comprising a bottom plate, a panel being fixed to the top surface of the bottom plate;

[0009] A plurality of fixed tubes are fixedly connected to the panel, the fixed tubes are composed of two arc-shaped tube shells spliced ​​to each other, and an arc-shaped rubber block is fixed on the inner side of the top of the arc-shaped tube shell;

[0010] A plurality of movable tubes are respectively slidably clamped on the outer sides of the fixed tubes at corresponding positions, wherein the movable tubes are composed of two mutually hinged arc-shaped tube shells 2, and an arc-shaped rubber block 2 is fixed on the inner side of the bottom of the arc-shaped tube shell 2;

[0011] A plurality of bottom covers are respectively fixed on the bottom of the movable tube at corresponding positions, and a guide shaft is fixed on the bottom surface of the bottom cover;

[0012] An air delivery assembly, used for delivering air to the interior of the fixed pipe and the movable pipe;

[0013] The weight-attaching mechanism applies weight to the bottom end of the movable tube through the guide shaft. The weight-attaching mechanism includes a support plate, a movable seat is slidably provided on the top surface of the support plate, two support plates are fixed at one end of the movable seat, a conveyor belt is transmission-connected between the two support plates, and a counterweight block slidably connected to the guide shaft is detachably fixed on the outer side of the conveyor belt.

[0014] Furthermore, a sealing gasket 1 and a sealing gasket 2 are fixed to the inner sides of the arc-shaped tube shell 1 and the arc-shaped tube shell 2 respectively.

[0015] Furthermore, two connecting ears 1 are fixed on the outer side of the arc-shaped tube shell 1, two connecting ears 2 are fixed on the outer sides of both ends of the arc-shaped tube shell 2, and two adjacent connecting ears 1 and two adjacent connecting ears 2 are fixedly connected by bolts.

[0016] Furthermore, a slide groove is provided on the outer side of the first arc-shaped tube shell, a clamping block is fixed on the inner side of the second arc-shaped tube shell, and the clamping block is slidably connected with the slide groove.

[0017] Furthermore, an electric push rod for driving the moving seat to move is fixed on the top of the support plate, two pulleys connected to the conveyor belt drive are rotated between the two support plates, and a motor for driving the pulley at the corresponding position to rotate is fixed on the outer side of one of the support plates.

[0018] Furthermore, a limit plate is fixed between the two support plates, an electromagnet is embedded and fixed on the outer side of the conveyor belt, and the electromagnet and the counterweight block are detachably fixed by adsorption.

[0019] Further, the gas delivery assembly comprises:

[0020] An air delivery pipe, one end of which is sealed, an exhaust fan is provided on the inner side of the panel, and an air outlet end of the exhaust fan is connected and fixed to the air delivery pipe at a corresponding position;

[0021] A plurality of bent pipes are all connected and fixed on the outside of the gas transmission pipe, and a plurality of fixed pipes are respectively connected and fixed with the bent pipes at corresponding positions.

[0022] Preferably, it further includes an adjusting mechanism and an electric slide rail. The adjusting mechanism is used to adjust the height of the weight-attaching mechanism. The adjusting mechanism includes:

[0023] A chassis, which is slidably connected to the electric slide rail. A second motor is fixed inside the chassis.

[0024] A U-shaped frame is fixed on the top of the chassis. A lead screw is rotatably connected between the U-shaped frame and the chassis. The output end of the second motor is fixedly connected to the lead screw.

[0025] Furthermore, columns fixedly connected to the electric slide rail are fixed at both ends of the bottom plate. An electric slider slides on the top of the electric slide rail, and the electric slider is fixedly connected to the chassis.

[0026] Furthermore, a shaft rod is fixed between the U-shaped frame and the chassis. Connecting seats are fixed on both sides of the support plate. The shaft rod is slidably connected to the connecting seat at the corresponding position, and the lead screw is threadedly connected to the connecting seat at the corresponding position.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. By fixing a plurality of fixed tubes on the frame, an activity tube is slidably sleeved on the outer side of the bottom of the fixed tube. The fixed tube is composed of two arc-shaped tube shells spliced together, and the activity tube is composed of two arc-shaped tube shells hinged to each other. Rotate and open one of the arc-shaped tube shells on the activity shell to expand the fixed tube and the activity tube, which is convenient for placing the power cord between the fixed tube and the activity tube, and arranging the plug of the power cord at the top end of the fixed tube and the socket of the power cord at the bottom end of the activity tube. Close the arc-shaped tube shell to seal the power cord between the fixed tube and the activity tube with bolts. The weight-attaching mechanism releases the counterweight block onto the guiding shaft, and the counterweight block vertically moves downward along the guiding shaft and impacts the circular block, so that the weight of the counterweight block is instantaneously applied to the activity tube, and the activity tube moves downward along the fixed tube to give a downward pulling force to the power cord, realizing a sudden pull test on the power cord;

[0029] One power cord can be clamped and stored in each of the fixed tubes and activity tubes at different positions. At the same time, the electric slide rail and the electric slider of the prior art are used in cooperation to enable the adjusting mechanism to drive the weight-attaching mechanism to move outside the guiding shaft below the activity tubes at different positions, so that the weight-attaching mechanism can attach the counterweight to different guiding shafts, realizing that the same weight-attaching mechanism can perform a sudden pull test on power cords at different positions;

[0030] After the power cord is installed between the fixed tube and the activity tube, the gravity of the activity tube, the guiding shaft and the circular block is all applied to the bottom end of the power cord through the activity tube, which is convenient for the activity tube to pre-tension and straighten the power cords of different lengths to be tested, and prevent the buffer of the pulling force on the power cord at the bending part when the power cord is pulled and bent later.

[0031] 2. An air supply pipe is arranged on the outside of multiple fixed pipes, and the fixed pipes are connected to the air supply pipes through a bend pipe. The outside of the movable pipe is also connected and fixed with a bend pipe. The air is pumped into the space between the fixed pipe and the movable pipe by an exhaust fan. At the same time, the solenoid valve of the bend pipe on the movable pipe is closed to maintain a certain air pressure in the space. A pressure sensor is installed inside the fixed pipe in advance. The air pressure inside the space can be known through the pressure sensor. When the rubber of the power cord is damaged or cracked due to the sudden pull test, the air in the space will leak through the damaged position, thereby reducing the pressure sensor reading. On the contrary, the pressure sensor reading has not changed, or the change value is within a reasonable value range, which means that the power cord is intact. By observing whether the pressure sensor reading changes, it is possible to conveniently and efficiently determine whether the power cord is damaged after the sudden pull test.

[0032] 3. By connecting the air inlet end of the exhaust fan with the air outlet end of the external air heater, or with the air outlet end of the external cooling fan, the exhaust fan can transport hot air or cold air to the space between the fixed pipe and the movable pipe through the air pipe and the elbow, so that the power cord is subjected to a sudden pressure test in a high temperature or cold environment, which is convenient for arranging the power cord for sudden pull test in different temperature environments, which is beneficial to improve the accuracy of the sudden pull results of the power cord in special use environments.

[0033] 4. Two support plates are arranged on the weight-attaching mechanism, and a conveyor belt is driven between the two support plates through a pulley. A counterweight is fixed on the outer side of the conveyor belt by an electromagnet. The upward conveying of the conveyor belt can move the counterweight to a suitable height position, so as to prepare for the subsequent sudden pulling of the power cord by the counterweight along the guide shaft. The downward conveying of the conveyor belt allows the electromagnet to fix the fallen counterweight. As the conveyor belt continues to move upward, it is convenient to lift the counterweight after the sudden pulling of the power cord again for standby use, so as to facilitate multiple sudden pulling tests on the power cord at the same position.

[0034] 5. By pre-manufacturing counterweights of different weights, and then adsorbing and installing the counterweights on the electromagnets of the conveyor belt, it is convenient to apply different sudden pulling forces to the power cord. When the weight-attached mechanism carries the counterweights to other positions for sudden pulling tests, the exhaust fan is used to transport air to the air pipe to make the fixed pipe and the movable pipe reach a certain air pressure. At this time, the air pressure will make the movable pipe have a tendency to slide downward on the fixed pipe, so that the power cord can continue to maintain the downward tension force as needed after the sudden pulling test. In addition, the size of the tensioning force is proportional to the size of the air pressure. By adjusting the size of the air pressure, the tensioning force indirectly generated by the air pressure can be made the same as the tensioning force of the previous counterweight sudden pulling test. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2It is a schematic diagram of the structure of the counterweight block in the present invention moving downward along the guide shaft;

[0037] Figure 3 It is a schematic diagram of the frame structure in the present invention;

[0038] Figure 4 It is a schematic diagram of the structure of the fixed tube and the movable tube in the present invention;

[0039] Figure 5 It is a schematic diagram of the unfolded structure of the fixed tube and the movable tube in the present invention;

[0040] Figure 6 It is a schematic diagram of the structure of the arc-shaped tube shell 2 and the arc-shaped tube shell 1 in the present invention in a split three-dimensional state;

[0041] Figure 7 It is a schematic diagram of the structure of the gas transmission component in the present invention;

[0042] Figure 8 It is a schematic diagram of the structure of the weight attachment mechanism and the adjustment mechanism in the present invention;

[0043] Fig. 9 It is a schematic diagram of the structure of the weight-attaching mechanism in the present invention;

[0044] Fig.10 It is a schematic diagram of the external structure of the support plate in the present invention.

[0045] In the figure: 100, frame; 110, bottom plate; 120, panel; 121, exhaust fan; 130, column; 200, fixed pipe; 210, arc-shaped pipe shell 1; 211, slide groove; 212, sealing gasket 1; 213, connecting ear 1; 214, pressure sensor; 220, arc-shaped rubber block 1; 230, top cover; 300, movable pipe; 310, arc-shaped pipe shell 2; 311, connecting ear 2; 312, sealing gasket 2; 313, convex block; 314, block; 320, arc-shaped rubber block 2; 400, bottom cover; 41 0, guide shaft; 500, gas delivery assembly; 510, gas delivery pipe; 520, elbow; 521, solenoid valve; 600, weight-attaching mechanism; 610, support plate; 611, electric push rod; 620, moving seat; 630, support plate; 631, pulley; 632, limit plate; 633, motor 1; 640, conveyor belt; 641, counterweight; 642, electromagnet; 700, adjustment mechanism; 710, chassis; 720, bracket; 721, screw rod; 722, shaft rod; 800, electric slide rail; 810, electric slider. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] For example, see Figure 1 - Fig.10 In an embodiment of the present invention, a power cord sudden pull tester includes a frame 100, the frame 100 includes a bottom plate 110, a panel 120 is fixed to the top surface of the bottom plate 110, a plurality of fixed tubes 200 are fixed at equal intervals on the top of the panel 120, the fixed tube 200 is composed of two arc-shaped tube shells 210 spliced ​​to each other and having the same structure, an arc-shaped rubber block 220 is fixed to the inner side of the top of the arc-shaped tube shell 210, a movable tube 300 is slidably connected to the outer side of the bottom of the fixed tube 200, the movable tube 300 is composed of two arc-shaped tube shells 310 hinged to each other and having the same structure, an arc-shaped rubber block 320 is fixed to the inner side of the bottom of the arc-shaped tube shell 310, a bottom cover 400 is fixed to the bottom of the movable tube 300, and the bottom of the bottom cover 400 A guide shaft 410 is fixed on the surface, and air delivery components 500 are arranged on the outer sides of multiple fixed tubes 200 and the outer sides of multiple movable tubes 300. The air delivery components 500 are used to deliver air to the fixed tubes 200 and the movable tubes 300. A weight-attaching mechanism 600 is arranged on one side of the multiple guide shafts 410. The weight-attaching mechanism 600 applies weight to the bottom end of the movable tube 300 through the guide shaft 410. The weight-attaching mechanism 600 includes a support plate 610, and a movable seat 620 is slidably provided on the top surface of the support plate 610. Two support plates 630 are fixed at one end of the movable seat 620. The two support plates 630 are connected by a conveyor belt 640 for transmission. A counterweight block 641 slidably connected to the guide shaft 410 is detachably fixed on the outer side of the conveyor belt 640.

[0048] Specifically, by clamping and fixing the two ends of the power cord at the ends of the fixed tube 200 and the movable tube 300 respectively, the movable tube 300 can slide outside the fixed tube 200, and the weight-attaching mechanism 600 applies the counterweight block 641 to the guide shaft 410 below the movable tube 300, so that the guide shaft 410 gives the power cord a sudden downward pulling force through the movable tube 300, thereby realizing a sudden pull test on the power cord. After the test, the air supply component 500 is used to supply air to the space between the fixed tube 200 and the movable tube 300, so that the power cord is in a high-pressure environment. By observing whether the air pressure in the space changes, it is convenient to judge whether the power cord subjected to the sudden pull pressure test is damaged. The prior art air heater or air cooler is connected to the air supply component 500, so that high-temperature or low-temperature air is supplied to the space between the fixed tube 200 and the movable tube 300, so that the power cord is subjected to a sudden pull test in a high-temperature or low-temperature environment, which is beneficial to improving the accuracy of the sudden pull result of the power cord under special use environments.

[0049] like Figure 5 As shown, in this embodiment, a sealing gasket 1 212 and a sealing gasket 2 312 are fixed to the inner sides of the arc tube shell 1 210 and the arc tube shell 2 310 respectively. After the power cord is installed between the fixed tube 200 and the movable tube 300, the arc tube shell 2 310 on one side of the movable tube 300 is closed so that the two arc tube shells 2 310 are rotated and combined into a complete movable tube 300, and at the same time, the two arc tube shells 1 210 are rotated and spliced ​​into a complete fixed tube 200.

[0050] In this embodiment, the two long strip sealing gaskets 1 212 arranged opposite to each other on the inner side of the arc tube shell 1 210 can squeeze and seal the contact surfaces of the two arc tube shells 1 210 when the two arc tube shells 1 210 are merged with each other. The two long strip sealing gaskets 2 312 arranged opposite to each other on the inner side of the arc tube shell 2 310 can squeeze and seal the contact surfaces of the two arc tube shells 2 310 when the two arc tube shells 2 310 are rotated and merged with each other, which is beneficial to improve the sealing performance of the movable tube 300 and the fixed tube 200.

[0051] like Figure 5 As shown, in this embodiment, a pressure sensor 214 of the prior art is installed and fixed inside an arc-shaped tube shell 210 of the fixed tube 200. The pressure sensor 214 can detect the air pressure in the internal space of the fixed tube 200 when air is transported to the internal space of the fixed tube 200, so that it is convenient to judge whether the rubber on the outer side of the power cord is damaged and leaking according to the change in the air pressure indication, and it is also convenient to control the movable tube 300 to provide a long-term downward pulling force to the power cord according to the change in the air pressure indication, so that the power cord can be subjected to a long-term pulling test according to different pulling forces.

[0052] like Figure 4 and Figure 5As shown, in this embodiment, the two arc-shaped rubber blocks 220 at the top of the fixed tube 200 can seal and clamp the plug end of the power cord after the two arc-shaped tube shells 210 are combined, and the two arc-shaped rubber blocks 320 inside the movable tube 300 can seal and clamp the end of the power cord jack after the two arc-shaped tube shells 310 are combined, so that the ends of the fixed tube 200 and the movable tube 300 can be in a sealed state after the power cord is installed.

[0053] like Figure 1 and Figure 4 As shown, in this embodiment, a top cover 230 is fixed to the top of the fixing tube 200, and the panel 120 is fixedly connected to the top cover 230, so that the fixing tube 200 suspends and fixes the plug end of the power cord on the top of the panel 120, and the internal space of the top cover 230 is convenient for storing the plug of the power cord.

[0054] like Figure 4 As shown, in this embodiment, two connecting ears 213 are fixed on the outer side of the arc tube shell 1 210, and two connecting ears 311 are fixed on the outer sides of both ends of the arc tube shell 2 310, and two adjacent connecting ears 213 and two adjacent connecting ears 311 are fixedly connected by bolts.

[0055] In this embodiment, after the two arc-shaped tube shells 1 210 and the two arc-shaped tube shells 2 310 are respectively combined to form a complete pipeline, they can be fixed between the two relatively positioned connecting ears 1 213 and between the two relatively positioned connecting ears 2 311 using existing technology bolts, thereby fixing the combined pipeline and allowing the movable tube 300 and the fixed tube 200 to maintain a complete pipeline state during the sudden pull test.

[0056] like Figure 6 As shown, in this embodiment, a slide groove 211 is provided on the outer side of the arc tube shell 1 210, and a clamping block 314 is fixed on the inner side of the arc tube shell 2 310. The clamping block 314 is slidably connected to the slide groove 211. The clamping block 314 slides in the slide groove 211, so that the arc tube shell 2 310 can slide on the outer side of the arc tube shell 1 210 at the corresponding position, thereby realizing flexible adjustment of the position of the movable tube 300 on the fixed tube 200, and facilitating the movable tube 300 to be forced to move downward to achieve the effect of pulling the power line.

[0057] like Fig. 9 and Fig.10As shown, in this embodiment, an electric push rod 611 for driving the moving seat 620 to move is fixed on the top of the support plate 610. The extension or shortening of the output end of the electric push rod 611 can enable the moving seat 620 to move toward or away from the guide shaft 410 with the two support plates 630, so as to facilitate pushing the counterweight block 641 to the outside of the guide shaft 410. The moving seat 620 is slidably connected on the support plate 610, which is beneficial to improve the stability of the movement of the moving seat 620.

[0058] like Figure 2 and Fig. 9 As shown, in the present embodiment, a notch is provided on one side of the counterweight block 641, and the notch extends to the middle of the counterweight block 641, so that the notch position of the counterweight block 641 can be pushed and clamped to the outside of the guide shaft 410. After the weight attachment mechanism 600 releases the counterweight block 641, the counterweight block 641 can fall along the guide shaft 410 to the circular block position at the bottom thereof, so that the gravity of the counterweight block 641 gives the power cord a sudden downward pulling force, wherein the circular block can prevent the counterweight block 641 from detaching from the guide shaft 410.

[0059] like Fig. 9 and Fig.10 As shown, in this embodiment, two pulleys 631 are rotated between the two support plates 630 and are both transmission-connected to the conveyor belt 640. A motor 633 is fixed on the outer side of one support plate 630 to drive the pulley 631 at the corresponding position to rotate.

[0060] In this embodiment, the motor 633 drives one of the pulleys 631 to rotate forward and backward so that the conveyor belt 640 can be transmitted back and forth between the two pulleys 631. During the reciprocating transmission, the electromagnet 642 does not pass through the position of the pulley 631, so that the conveyor belt 640 moves up and down with the counterweight 641 to a suitable height position to release the counterweight 641. The conveyor belt 640 can also move with the electromagnet 642 to the position of the released counterweight 641, and re-absorb and fix the counterweight 641 and move it up for standby use.

[0061] like Figure 8 - Fig. 9 As shown, in this embodiment, a limit plate 632 is fixed between the two support plates 630, and an electromagnet 642 is embedded and fixed on the outer side of the conveyor belt 640. The electromagnet 642 and the counterweight block 641 can be detachably fixed by adsorption.

[0062] In this embodiment, the counterweight block 641 can be made of iron material, so that the electromagnet 642 can be energized to adsorb and fix the counterweight block 641. The electromagnet 642 can be transmitted to different positions along with the conveyor belt 640, so that the counterweight block 641 can be brought to the top of the guide shaft 410 for release, and then the counterweight block 641 can be picked up from the bottom of the guide shaft 410. The limit plate 632 is arranged on the inner side of the conveyor belt 640 to guide the counterweight block 641 to fall stably along the guide shaft 410.

[0063] like Figure 2 and Figure 7 As shown, in this embodiment, the gas supply component 500 includes a gas supply pipe 510, one end of which is sealed, and an exhaust fan 121 is arranged on the inner side of the panel 120. The air outlet end of the exhaust fan 121 is connected and fixed to the gas supply pipe 510 at a corresponding position, and a plurality of bent pipes 520 are connected and fixed at equal intervals on the outside of the gas supply pipe 510, and an electromagnetic valve 521 is installed on the outside of the bent pipe 520. The fixed pipe 200 and the movable pipe 300 are respectively connected and fixed to the bent pipe 520 at corresponding positions, and the outer side of the movable pipe 300 is also connected and fixed with the bent pipe 520, and the outer side of the bent pipe 520 is also fixed with the electromagnetic valve 521.

[0064] In this embodiment, the air supply pipe 510 is connected and fixed on one side of the multiple fixed pipes 200 through multiple curved pipes 520. The exhaust fan 121 can pump air into the air supply pipe 510, and the solenoid valve 521 on the curved pipe 520 on the outer side of the test fixed pipe 200 is opened, so that the multiple curved pipes 520 on the air supply pipe 510 can transport air to the inside of the fixed pipes 200 at different positions. At the same time, the solenoid valve 521 of the curved pipe 520 on the movable pipe 300 below the fixed pipe 200 is closed, so that the space between the fixed pipe 200 and the movable pipe 300 can store air pumped from the outside, which is convenient for increasing the air pressure in the space.

[0065] like Figure 6 As shown, in this embodiment, both ends of the outer side of the arc-shaped tube shell 2 310 are fixed with protrusions 313, and the two protrusions 313 are arranged oppositely to facilitate the installation of the hinge rotation connection, so that the two arc-shaped tube shells 2 310 are rotatably connected.

[0066] Embodiment 2, based on embodiment 1, is to adjust the height and lateral position of the weight attachment mechanism 600 so that the weight attachment mechanism 600 can perform a sudden pull test on power cords at different positions.

[0067] like Figure 2 , Figure 3 and Figure 8As shown, in this embodiment, the power cord sudden pull testing machine further includes an adjusting mechanism 700 and an electric slide rail 800. The adjusting mechanism 700 is used to adjust the height of the weight attachment mechanism 600. The adjusting mechanism 700 includes a chassis 710 slidably connected to the electric slide rail 800. An electric slider 810 slides on the top of the electric slide rail 800, and the electric slider 810 is fixedly connected to the chassis 710. A second motor is fixed inside the chassis 710. A U-shaped frame 720 is fixed on the top of the chassis 710. A lead screw 721 is rotatably connected between the U-shaped frame 720 and the chassis 710. The output end of the second motor is fixedly connected to the lead screw 721. A shaft rod 722 is fixed between the U-shaped frame 720 and the chassis 710. Connecting seats are fixed on both sides of the support plate 610. The shaft rod 722 is slidably connected to the connecting seat at the corresponding position, and the lead screw 721 is threadedly connected to the connecting seat at the corresponding position.

[0068] Specifically, the linear sliding of the electric slider 810 on the electric slide rail 800 is a prior art, and the specific sliding principle will not be elaborated. During the movement of the electric slider 810, the entire adjusting mechanism 700 is linearly moved, so that the adjusting mechanism 700 can move the weight attachment mechanism 600 to the outside of the fixed pipe 200 and the movable pipe 300 to be tested. The second motor inside the chassis 710 drives the lead screw 721 to rotate forward and backward. The support plate 610 threadedly connected to the lead screw 721 moves up and down along the shaft rod 722, realizing the adjustment of the weight attachment mechanism 600 to a suitable position height, so that the weight attachment mechanism 600 can move the counterweight block 641 to a suitable position for release.

[0069] As Figure 3 As shown, in this embodiment, columns 130 fixedly connected to the electric slide rail 800 are fixed at both ends of the bottom plate 110, so that the electric slide rail 800 is installed and fixed on the top of the bottom plate 110. And two support columns are fixed on the top surface of the bottom plate 110. The support columns support and fix the top of the panel 120, so that the panel 120 can be stably fixed on the top of the bottom plate 110.

[0070] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0071] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A power line pull tester, characterized in that: include: A frame (100), the frame (100) comprising a bottom plate (110), a panel (120) being fixed to the top surface of the bottom plate (110); A plurality of fixed tubes (200) are fixedly connected to the panel (120), the fixed tube (200) is composed of two arc-shaped tube shells (210) spliced ​​to each other, and an arc-shaped rubber block (220) is fixed on the inner side of the top of the arc-shaped tube shell (210); A plurality of movable tubes (300) are respectively slidably clamped on the outside of the fixed tubes (200) at corresponding positions, the movable tubes (300) are composed of two mutually hinged arc-shaped tube shells (310), and an arc-shaped rubber block (320) is fixed on the inner side of the bottom of the arc-shaped tube shell (310); A plurality of bottom covers (400) are respectively fixed on the bottom of the movable tube (300) at corresponding positions, a guide shaft (410) is fixed on the bottom surface of the bottom cover (400), and a circular block is fixed on the bottom end of the guide shaft (410); An air delivery assembly (500) is used to deliver air to the interior of the fixed tube (200) and the movable tube (300); The weight attachment mechanism (600) applies weight to the bottom end of the movable tube (300) through the guide shaft (410). The weight attachment mechanism (600) comprises a support plate (610). A movable seat (620) is slidably disposed on the top surface of the support plate (610). Two support plates (630) are fixed to one end of the movable seat (620). A conveyor belt (640) is transmission-connected between the two support plates (630). A counterweight block (641) slidably connected to the guide shaft (410) is detachably fixed to the outer side of the conveyor belt (640).

2. The power cord pull tester according to claim 1, characterized in that: The inner sides of the arc-shaped tube shell 1 (210) and the arc-shaped tube shell 2 (310) are respectively fixed with a sealing gasket 1 (212) and a sealing gasket 2 (312).

3. The power cord pull tester according to claim 1, characterized in that: Two connecting ears (213) are fixed on the outer side of the arc-shaped tube shell (210), and two connecting ears (311) are fixed on the outer sides of both ends of the arc-shaped tube shell (310). Two adjacent connecting ears (213) and two adjacent connecting ears (311) are fixedly connected by bolts.

4. The power cord pull tester according to claim 1, characterized in that: A sliding groove (211) is provided on the outer side of the arc-shaped tube shell (210), and a clamping block (314) is fixed on the inner side of the arc-shaped tube shell (310), and the clamping block (314) is slidably connected to the sliding groove (211).

5. The power cord pull tester according to claim 1, characterized in that: An electric push rod (611) for driving the movable seat (620) to move is fixed on the top of the support plate (610), two pulleys (631) are rotatably connected to the conveyor belt (640) between the two support plates (630), and a motor (633) for driving the pulley (631) at the corresponding position to rotate is fixed on the outer side of one support plate (630).

6. The power cord pull tester according to claim 1, characterized in that: A limit plate (632) is fixed between the two support plates (630), an electromagnet (642) is embedded and fixed on the outer side of the conveyor belt (640), and the electromagnet (642) and the counterweight block (641) are detachably fixed by adsorption.

7. The power cord pull tester according to claim 1, characterized in that: The gas delivery assembly (500) comprises: An air delivery pipe (510), one end of which is sealed, an exhaust fan (121) is provided on the inner side of the panel (120), and an air outlet end of the exhaust fan (121) is connected and fixed to the air delivery pipe (510) at a corresponding position; A plurality of elbow pipes (520) are all connected and fixed to the outside of the gas transmission pipe (510). A plurality of fixed pipes (200) are respectively connected and fixed to the elbow pipes (520) at corresponding positions. An electromagnetic valve (521) is installed and fixed on the outside of the elbow pipes (520).

8. The power cord pull tester according to claim 1, characterized in that: It further includes an adjusting mechanism (700) and an electric slide rail (800). The adjusting mechanism (700) is used to adjust the height of the weight attaching mechanism (600). The adjusting mechanism (700) includes: A chassis (710) which is slidably connected to the electric slide rail (800). A second motor is fixed inside the chassis (710). A U-shaped frame (720) which is fixed to the top of the chassis (710). A lead screw (721) is rotatably arranged between the U-shaped frame (720) and the chassis (710). The output end of the second motor is fixedly connected to the lead screw (721).

9. The power cord pull tester according to claim 8, characterized in that: Columns (130) fixedly connected to the electric slide rail (800) are fixed at both ends of the bottom plate (110). An electric slider (810) slides on the top of the electric slide rail (800). The electric slider (810) is fixedly connected to the chassis (710).

10. The power cord pull tester according to claim 9, characterized in that: A shaft rod (722) is fixed between the U-shaped frame (720) and the chassis (710). Connecting seats are fixed on both sides of the support plate (610). The shaft rod (722) is slidably connected to the connecting seat at the corresponding position. The lead screw (721) is threadedly connected to the connecting seat at the corresponding position.

Images