Automatic testing equipment for tensile strength of wires and cables

Abstract

The present invention discloses an automatic tensile strength detection device for electric wires and cables, which belongs to the field of tensile strength detection of electric wires and cables, and comprises a frame, a control console is arranged on one side of the frame, a mounting plate is slidably arranged on the frame, a lower cylinder is fixedly arranged on the frame, an upper cylinder is fixedly installed on the bottom of the outer surface of the mounting plate, a first corrugated tube is fixedly connected to a clamping head at one end away from the telescopic groove, and multiple groups of clamping heads are arranged in a ring shape. By arranging a clamping assembly, the present application can automatically clamp the electric wires and cables in the process of inserting the electric wires and cables into the upper cylinder and the lower cylinder, in accordance with the manner in which the clamping assembly of the upper cylinder fixes the upper end of the electric wires and cables and the clamping assembly of the lower cylinder fixes the lower end of the electric wires and cables, without manually fixing the two ends of the electric wires and cables on the clamp of the tensile machine respectively, and adopts direct insertion type fixation, which simplifies the action of fixing the electric wires and cables on the clamp of the tensile machine, saves the time of clamping the electric wires and cables, and improves work efficiency.

Description

Technical Field

[0001] The invention relates to the field of tensile strength detection of electric wires and cables, and more specifically to an automatic tensile strength detection device for electric wires and cables. Background Art

[0002] Wires and cables are indispensable equipment in modern industry. Their tensile strength is one of the hard indicators. The tensile test of wires and cables is an important link to ensure their mechanical properties and durability. Through the tensile test, the strength and toughness of wires and cables when subjected to tension can be evaluated.

[0003] At present, tensile testing machines are often used to test the tensile strength of wires and cables in factories. In the process of using tensile testing machines to test wires and cables, it is first necessary to manually measure the size of the wires, then insert the wires and cables into the clamps of the tensile testing machine, and finally adjust the pressure of the clamps by handwheels to firmly fix the wires and cables in the clamps. This fixing method requires testers to do this for each wire and cable sample, so it is very time-consuming and the detection efficiency is not high in the operation of tensile strength testing of wire samples. In order to improve the tensile strength test of wires and cables, it is necessary to simplify the action of clamping wires and cables by tensile testing machines. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a suspension device for detecting the tensile strength of wires and cables, which is capable of determining the position of the center of gravity of a material and adjusting the center of gravity of the material.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A device for automatically detecting the tensile strength of electric wires and cables, comprising a frame, a control console being arranged on one side of the frame, a mounting plate being slidably arranged on the frame, a lower cylinder being fixedly arranged on the frame, an upper cylinder being fixedly arranged on the bottom of the outer surface of the mounting plate, a mounting plate being fixedly connected to the top of the outer surface of the mounting plate, a first electric telescopic rod being fixedly connected to the bottom of the upper cylinder, a first slot being arranged in the upper cylinder, a second slot being arranged in the lower cylinder, a third slot being arranged in the first electric telescopic rod, an electric wire body being inserted into the first slot, the second slot and the third slot, multiple groups of telescopic grooves being arranged on the inner walls of the upper cylinder and the lower cylinder, a clamping assembly being arranged in the telescopic groove, the clamping assembly comprising a first corrugated tube arranged on the inner wall of the telescopic groove, an end of the first corrugated tube away from the telescopic groove being fixedly connected to a clamping head, and the multiple groups of clamping heads being arranged in a ring shape.

[0007] Furthermore, a size adjustment component is provided in the lower cylinder, and the size adjustment component includes a sliding plate with a sliding seal arranged in the pressure chamber, a circle of electromagnets is fixedly installed on the bottom of the sliding plate, a circle of first contact ring is fixedly sleeved on the bottom end of the side of the sliding plate, an iron ring is provided with a sliding seal in the pressure chamber, a thrust spring is fixedly connected to the top of the iron ring, the top of the thrust spring is fixedly connected to the bottom of the outer surface of the sliding plate, a second contact ring is fixedly installed on the inner wall of the pressure chamber, a hose is fixedly inserted into the bottom of the pressure chamber, one end of the hose extends through the pressure chamber to the outside of the lower cylinder and is connected to the bellows, and a pressure sensor is fixedly installed on the surface of the clamping head.

[0008] Furthermore, a second electric telescopic rod is fixedly installed on the frame, the telescopic end of the second electric telescopic rod extends into the pressure chamber, the thrust spring is sleeved on the telescopic end of the second electric telescopic rod, and the iron ring sliding seal is sleeved on the outer surface of the telescopic end of the second electric telescopic rod.

[0009] Furthermore, a straightening assembly is arranged in the upper cylinder, a sliding cavity is opened in the upper cylinder, the sliding cavity is communicated with the telescopic slot, the sliding cavity allows the clamping assembly in the upper cylinder to slide up and down, and the clamping assembly is fixedly installed in the telescopic slot in the lower cylinder.

[0010] Furthermore, the upper tube is provided with a plurality of groups of first slide grooves, the straightening assembly comprises a second bellows fixedly mounted on the inner wall of the first slide groove, the telescopic end of the second bellows is fixedly connected to an end of the first bellows close to the hose, the telescopic end of the second bellows is located at the bottom of the second bellows, a gas flow meter is fixedly arranged on the second bellows, an electric valve is also fixedly arranged on the second bellows, the electric valve is located above the gas flow meter, the electric valve and the gas flow meter can slide in the first slide groove, the first slide groove extends to the outside of the upper tube, and the upper tube is provided with a plurality of groups of second slide grooves, the second slide grooves are for the hose to slide up and down.

[0011] Furthermore, a conductive spring is sleeved on the outer surface of the first corrugated tube, one end of the conductive spring is fixedly connected to the clamping head, and the other end of the conductive spring is fixedly connected to the inner wall of the telescopic slot.

[0012] Furthermore, the sizes of the multiple groups of clamping heads are the same as the sizes of the first slot, the second slot and the third slot, and the size of the sliding plate is the same as the size of the clamping head.

[0013] Furthermore, a plurality of glass plates are fixedly mounted on the telescopic end of the first electric telescopic rod, and the telescopic end of the first electric telescopic rod is fixedly connected to the top end of the outer surface of the lower tube.

[0014] Furthermore, the first contact ring is electrically connected to the second contact ring, the first contact ring is electrically connected to the electromagnet, and the thickness of the iron ring is the same as the inner diameter of the hose.

[0015] Furthermore, the pressure sensor is electrically connected to the conductive spring, the pressure sensor is electrically connected to the control console, and the first electric telescopic rod and the second electric telescopic rod are electrically connected to the control console.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present application provides a clamping assembly, which can automatically clamp the wires and cables during the process of inserting the wires and cables into the upper cylinder and the lower cylinder, in a manner such that the clamping assembly of the upper cylinder fixes the upper end of the wires and cables, and the clamping assembly of the lower cylinder fixes the lower end of the wires and cables. There is no need to manually fix the two ends of the wires and cables on the clamp of the tensile testing machine respectively. Direct insertion is adopted to simplify the action of fixing the wires and cables on the clamp of the tensile testing machine, save time for clamping the wires and cables, and improve work efficiency.

[0018] (2) By setting up a size adjustment component, the present application can be applied to the tensile performance test of wire bodies of different sizes. There is no need to manually measure the size of the wire body, and the size of the clamping head can be manually adjusted according to the size of the wire body to adapt to the size of the wire body, thereby reducing the time for changing the clamps of the wire body and further improving the testing efficiency of the wire body.

[0019] (3) The present application provides a second electric telescopic rod, which can automatically eject the tested wire body, thereby facilitating the next insertion of the wire body for testing. The wire body can be automatically unloaded after each test, and the tester does not need to remove the disconnected wire body from the clamp of the tensile testing machine after the test, thereby further improving the testing efficiency of the wire body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall front structure of the present invention;

[0021] Figure 2 It is a front cross-sectional view of the upper cylinder, the lower cylinder and the first electric telescopic rod of the present invention;

[0022] Figure 3 A front cross-sectional view of the upper cylinder, the lower cylinder and the first electric telescopic rod of the present invention undergoing a tensile test;

[0023] Figure 4 For the present invention Figure 3 A magnified view of the structure at center A;

[0024] Figure 5 It is a cross-sectional exploded view of the internal structure of the lower cylinder of the present invention;

[0025] Figure 6 For the present invention Figure 3 A magnified view of the structure at B in the middle;

[0026] Figure 7 It is a schematic side view of a part of the structure of the upper cylinder of the present invention;

[0027] Figure 8 It is a schematic diagram of the combination of the clamping assembly and the straightening assembly of the present invention.

[0028] Description of the numbers in the figure:

[0029] 1. Frame; 2. Upper cylinder; 3. Lower cylinder; 4. Clamping assembly; 5. Size adjustment assembly; 6. Second electric telescopic rod; 7. Straightening assembly; 8. Glass plate; 11. Control console; 12. Mounting plate; 13. First electric telescopic rod; 14. Mounting plate; 15. Wire body; 16. Third slot; 21. First slot; 22. Sliding cavity; 23. First slide groove; 24. Second slide groove; 31. Second slot; 32. Telescopic groove; 33. Pressure cavity; 41. First bellows; 42. Clamping head; 43. Conductive spring; 51. Sliding disk; 52. Electromagnet; 53. First contact ring; 54. Thrust spring; 55. Iron ring; 56. Second contact ring; 57. Hose; 58. Pressure sensor; 71. Second bellows; 72. Gas flow meter; 73. Electric valve. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 8, an automatic tensile strength detection device for wires and cables, comprising a frame 1, a console 11 is arranged on one side of the frame 1, a mounting plate 12 is slidably arranged on the frame 1, a lower cylinder 3 is fixedly arranged on the frame 1, an upper cylinder 2 is fixedly installed on the bottom of the outer surface of the mounting plate 12, a mounting plate 14 is fixedly connected to the top of the outer surface of the mounting plate 12, a first electric telescopic rod 13 is fixedly connected to the bottom of the upper cylinder 2, a first slot 21 is opened in the upper cylinder 2, a second slot 31 is opened in the lower cylinder 3, a third slot 16 is opened in the first electric telescopic rod 13, a wire body 15 is inserted in the first slot 21, the second slot 31 and the third slot 16, multiple groups of telescopic grooves 32 are arranged on the inner walls of the upper cylinder 2 and the lower cylinder 3, a clamping assembly 4 is arranged in the telescopic groove 32, the clamping assembly 4 includes a first corrugated tube 41 arranged on the inner wall of the telescopic groove 32, an end of the first corrugated tube 41 away from the telescopic groove 32 is fixedly connected to a clamping head 42, and the multiple groups of clamping heads 42 are arranged in a ring shape.

[0032] When it is necessary to test the tensile performance of the wires and cables, the inspector first holds the wires and cables and inserts them into the mounting plate 14, and then gradually inserts the wires and cables into the upper cylinder 2, the first electric telescopic rod 13 and the lower cylinder 3. When the wires are inserted into the lower cylinder 3, the clamping assembly 4 starts to work, and the multiple groups of clamping heads 42 approach each other, thereby clamping the wires and cables, so that the upper cylinder 2 fixes the upper end of the wires and cables, and the lower cylinder 3 fixes the lower end of the wires and cables. Then the control console 11 starts the first electric telescopic rod 13 to work. The first electric telescopic rod 13 is extended at this time, and the mounting plate 12 moves from bottom to top, bringing the upper cylinder 2 up, while the lower cylinder 3 maintains an unchanged horizontal position, thereby achieving To stretch the wire and cable sample, one only needs to record the distance that the first electric telescopic rod 13 is extended to obtain the tensile strength value of the wire and cable sample. The design of the clamping assembly 4 can automatically clamp the wire and cable in the process of inserting the wire and cable into the upper cylinder 2 and the lower cylinder 3. The clamping assembly 4 of the upper cylinder 2 fixes the upper end of the wire and cable, and the clamping assembly 4 of the lower cylinder 3 fixes the lower end of the wire and cable. There is no need to manually fix the two ends of the wire and cable on the clamp of the tensile testing machine respectively. Direct insertion is adopted to simplify the action of fixing the wire and cable on the clamp of the tensile testing machine, save the time of clamping the wire and cable, and improve the testing efficiency of the wire body 15.

[0033] like Figures 2 to 6As shown, a size adjustment component 5 is provided in the lower cylinder 3, and the size adjustment component 5 includes a sliding plate 51 which is slidingly sealed and arranged in the pressure chamber 33, a circle of electromagnets 52 is fixedly installed at the bottom of the sliding plate 51, and a circle of first contact rings 53 are fixedly sleeved on the bottom end of the side of the sliding plate 51, and an iron ring 55 is slidingly sealed in the pressure chamber 33, and a thrust spring 54 is fixedly connected to the top of the iron ring 55, and the top of the thrust spring 54 is fixedly connected to the bottom of the outer surface of the sliding plate 51, a second contact ring 56 is fixedly installed on the inner wall of the pressure chamber 33, and a hose 57 is fixedly inserted at the bottom of the pressure chamber 33, one end of the hose 57 extends through the pressure chamber 33 to the outside of the lower cylinder 3 and is connected to the bellows, and a pressure sensor 58 is fixedly installed on the surface of the clamping head 42.

[0034] A conductive spring 43 is sleeved on the outer surface of the first bellows 41 . One end of the conductive spring 43 is fixedly connected to the clamping head 42 , and the other end of the conductive spring 43 is fixedly connected to the inner wall of the telescopic slot 32 .

[0035] The dimensions of the plurality of groups of clamping heads 42 are the same as the dimensions of the first slot 21 , the second slot 31 and the third slot 16 , and the dimension of the sliding plate 51 is the same as the dimension of the clamping heads 42 .

[0036] The first contact ring 53 is electrically connected to the second contact ring 56 , the first contact ring 53 is electrically connected to the electromagnet 52 , and the thickness of the iron ring 55 is the same as the inner diameter of the hose 57 .

[0037] The pressure sensor 58 is electrically connected to the conductive spring 43 , the pressure sensor 58 is electrically connected to the console 11 , and the first electric telescopic rod 13 and the second electric telescopic rod 6 are electrically connected to the console 11 .

[0038] First, when the wire body 15 is inserted into the first slot 21 of the upper cylinder 2, the wire body 15 will pass through the second slot 31 to the third slot 16. When the wire body 15 is inserted into the third slot 16 and contacts the sliding plate 51, pressing the sliding plate 51 to move the sliding plate 51 downward, the sliding plate 51 moves downward in the pressure chamber 33. The sliding plate 51 will cause the magnetic ring to move downward in the pressure chamber 33 through the thrust spring 54. When the magnetic ring moves downward to connect the hose 57 with the pressure chamber 33, the magnetic ring continues to move downward to the bottom of the pressure chamber 33. The sliding plate 51 continues to move downward, pushing the gas in the pressure chamber 33 into the first bellows 41 through the hose 57. The first bellows 41 will extend after the gas enters. At this time, multiple groups of extended bellows push the clamping heads 42 to approach each other, so that the multiple groups of clamping heads 42 in the upper cylinder 2 and the lower cylinder 3 can clamp the wire body 15. As the sliding plate 51 moves downward, the sliding plate 51 The first contact ring 53 on the disk 51 contacts the second contact ring 56 on the inner wall of the pressure chamber 33, so that the electromagnet 52 works, attracts the iron ring 55 and moves the iron ring 55 upward. After the iron ring 55 moves upward, the connection between the hose 57 and the pressure chamber 33 is sealed, and the clamping head 42 keeps the action of fixing the wire body 15. Through the design of the size adjustment component 5, the clamping components 4 in the upper cylinder 2 and the lower cylinder 3 can be started to work while the wire body 15 is inserted into the lower cylinder 3, so that multiple groups of clamping heads 42 are close to each other, and the wire body 15 is automatically fixed. It can be suitable for tensile performance testing of wire bodies 15 of different sizes, and there is no need to manually measure the size of the wire body 15, and the size of the clamping head 42 is manually adjusted according to the size of the wire body 15 to adapt to the size of the wire body 15, which reduces the clamping time of the wire body 15 and further improves the testing efficiency of the wire body 15.

[0039] When the wire body 15 becomes thicker, the clamping force of the clamping head 42 on the wire body 15 is relatively large. In order to ensure that the clamping force of the clamping head 42 on the surface of the wire body 15 is the same, the clamping force of the clamping head 42 needs to be reduced. At this time, the pressure sensor 58 located on the clamping head 42 will transmit a signal of excessive pressure to the console 11. The console 11 receives the signal and supplies power to the conductive spring 43, causing the conductive spring 43 to contract and pull the multiple groups of clamping heads 42 away from each other, reducing the pressure of the clamping head 42 on the wire body 15, thereby avoiding damage to the surface of the wire body 15 due to excessive pressure on the wire body 15 by the clamping head 42, affecting the final result when the tensile strength of the wire body 15 is tested. The design of the size adjustment component 5 can automatically adjust the pressure of the clamping component 4 on the wire body 15, avoiding the problem that the wire body 15 cannot be clamped due to the operator's lack of expertise when manually fixing the wire body 15, resulting in misoperation.

[0040] like Figures 2 to 6As shown, the second electric telescopic rod 6 is fixedly installed on the frame 1, the telescopic end of the second electric telescopic rod 6 extends to the inside of the pressure chamber 33, the thrust spring 54 is sleeved on the telescopic end of the second electric telescopic rod 6, and the iron ring 55 is slidably sealed on the outer surface of the telescopic end of the second electric telescopic rod 6.

[0041] When the first electric telescopic rod 13 works and the wire body 15 is broken, the control console 11 makes the second electric telescopic rod 6 work, and then the second electric telescopic rod 6 extends, pushing the sliding plate 51 to move upward in the pressure chamber 33. Due to the upward movement of the sliding plate 51, the first contact ring 53 and the second contact ring 56 are separated, the electromagnet 52 is powered off, and the iron ring 55 moves downward in the pressure chamber 33 due to its own gravity and the action of the thrust spring 54, so that the pressure chamber 33 is connected with the hose 57 again. Due to the mutual pressure influence between the clamping head 42 and the wire body 15, and the action of the second electric telescopic rod 6 that is being extended, the gas in the first bellows 41 will return to the pressure chamber 3 3, at this time, the first bellows 41 contracts, so that the clamping head 42 does not exert any pressure on the wire body 15 at all, and the effect of loosening the wire body 15 is achieved. The extended second electric telescopic rod 6 will pass through the sliding plate 51, and move from bottom to top in the second slot 31, the third slot 16 and the first slot 21 against the sliding plate 51, and push the broken wire body 15 in the second slot 31 out, so as to facilitate the next time to put the wire body 15 in for testing, and can automatically unload the wire body 15 after each test, and the tester does not need to remove the broken wire body 15 from the clamp of the tensile machine after the test, which further improves the test efficiency of the wire body 15;

[0042] It should be noted that the elastic force of the thrust spring 54 is smaller than the magnetic force of the electromagnet 52;

[0043] Two electric one-way valves need to be set at the position where the pressure chamber 33 is connected to the second slot 31, one of which is for external gas to enter the second slot 31, and the other is for external gas of the lower tube 3 to enter the second slot 31. When the second electric telescopic rod 6 is working, the two electric one-way valves are opened, and when the second electric telescopic rod 6 stops working, the two electric one-way valves are closed.

[0044] like Figures 2 to 8 As shown, a straightening assembly 7 is provided in the upper cylinder 2, a sliding cavity 22 is opened in the upper cylinder 2, the sliding cavity 22 is connected with the telescopic groove 32, the sliding cavity 22 allows the clamping assembly 4 in the upper cylinder 2 to slide up and down, and the clamping assembly 4 is fixedly installed in the telescopic groove 32 in the lower cylinder 3.

[0045] A plurality of first slide grooves 23 are provided in the upper tube 2, and the straightening assembly 7 includes a second bellows 71 fixedly installed on the inner wall of the first slide groove 23, the telescopic end of the second bellows 71 is fixedly connected to the end of the first bellows 41 close to the hose 57, the telescopic end of the second bellows 71 is located at the bottom of the second bellows 71, a gas flow meter 72 is fixedly provided on the second bellows 71, an electric valve 73 is also fixedly provided on the second bellows 71, the electric valve 73 is located above the gas flow meter 72, the electric valve 73 and the gas flow meter 72 can slide in the first slide groove 23, the first slide groove 23 extends to the outside of the upper tube 2, and a plurality of second slide grooves 24 are provided in the upper tube 2, and the second slide grooves 24 are provided for the hose 57 to slide up and down.

[0046] When the size adjustment component 5 is working, the pressure sensor 58 controls the conductive spring 43 to contract, thereby contracting the first bellows 41. At this time, since the communication port between the hose 57 and the pressure chamber 33 is blocked by the iron ring 55, the gas when the first bellows 41 contracts will enter the second bellows 71, thereby extending the second bellows 71 and moving the clamping component 4 in the upper tube 2 upward, thereby achieving the action of straightening the wire body 15, avoiding the situation that the wire body 15 is not straightened during the test, and the value of the tensile test is much higher than the original value;

[0047] Since the sizes of the first slot 21, the second slot 31 and the third slot 16 are constant, when the wire body 15 with a smaller size is inserted therein, there is extra space between the wire body 15 and the inner walls of the first slot 21, the second slot 31 and the third slot 16. Due to the action of the thrust spring 54, when the wire body 15 contacts the sliding plate 51, since the bottom of the wire body 15 is fixed by the clamping assembly 4, the wire body 15 located between the upper and lower clamping assemblies 4 will bend and fill the third slot 16. At this time, it is necessary to control the opening and closing of the electric valve 73 by controlling the air intake of the gas flow meter 72 to adjust the extension distance of the second bellows 71, so as to straighten the wire body 15. At this time, the first bellows 41 contracts, and the gas that has not completely entered the second bellows 71 can be discharged by opening the electric one-way valve connecting the slot and the outside of the lower cylinder 3 to maintain the balance of air pressure in the upper cylinder 2 and the lower cylinder 3.

[0048] For the above operation of judging whether the wire body 15 is over-straightened, the straightening amount of the wire body 15 can be obtained by the air intake of the gas flow valve when the electric valve 73 is open, thereby obtaining the value of the over-straightening of the wire body 15. The value of the over-straightening of the wire body 15 is added to the final value to obtain the correct value of the tensile strength test of the wire body 15. In this process, the electric one-way valves need to be kept in a closed state.

[0049] It should be noted that when current passes through the conductive spring 43, a magnetic field is generated, and this magnetic field interacts with the spring, causing the spring to contract. The greater the current, the stronger the magnetic field generated, and the greater the degree of contraction of the conductive spring 43.

[0050] The electric valve 73 may be a ball valve or the like, which is used to control the inlet and outlet of gas from the second bellows 71 .

[0051] like Figure 3 As shown, a plurality of glass plates 8 are fixedly mounted on the telescopic end of the first electric telescopic rod 13 , and the telescopic end of the first electric telescopic rod 13 is fixedly connected to the top end of the outer surface of the lower tube 3 .

[0052] When the first electric telescopic rod 13 is working, since the lower cylinder 3 is fixed on the frame 1 and the mounting plate 12 is slidably set on the frame 1, when the first electric telescopic rod 13 is extended to realize the tensile test action of the wire body 15, the entire upper cylinder 2 will move up together with the mounting plate 12, and when the wire body 15 is pulled apart, fragments of the wire body 15 will burst out. In order to prevent the fragments of the wire body 15 from flying and injuring the tester, the telescopic end of the first electric telescopic rod 13 will block the fragments of the wire body 15 that burst out to ensure the working environment of the tester. The entire testing process is in the first slot 21, the second slot 31 and the third slot 16, avoiding the situation where the operator is injured by the fragments of the broken wire body 15.

[0053] Instructions for use: When it is necessary to test the tensile strength of wires and cables, the inspector first holds the wires and cables and inserts them into the mounting plate 14, and then gradually inserts the wires and cables into the upper cylinder 2, the first electric telescopic rod 13 and the lower cylinder 3. When the wires are inserted into the lower cylinder 3, the clamping assembly 4 starts to work, and the multiple groups of clamping heads 42 approach each other, thereby clamping the wires and cables, so that the upper cylinder 2 fixes the upper end of the wires and cables, and the lower cylinder 3 fixes the lower end of the wires and cables. Then the control console 11 starts the first electric telescopic rod 13 to work. The first electric telescopic rod 13 is extended at this time, and the mounting plate 12 moves from bottom to top, bringing the upper cylinder 2 up, while the lower cylinder 3 remains in a horizontal position unchanged. To achieve the action of stretching the wire and cable sample, it is only necessary to record the extension distance of the first electric telescopic rod 13 to obtain the tensile strength value of the wire and cable sample. The design of the clamping component 4 can automatically clamp the wire and cable in the process of inserting the wire and cable into the upper cylinder 2 and the lower cylinder 3, in the manner that the clamping component 4 of the upper cylinder 2 fixes the upper end of the wire and cable, and the clamping component 4 of the lower cylinder 3 fixes the lower end of the wire and cable. There is no need to manually fix the two ends of the wire and cable on the clamp of the tensile testing machine respectively. Direct insertion is adopted to simplify the action of fixing the wire and cable on the clamp of the tensile testing machine, saves the time of clamping the wire and cable, and improves the testing efficiency of the wire body 15.

[0054] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic testing device for tensile strength of electric wires and cables, comprising a frame (1), a control console (11) being arranged on one side of the frame (1), and a mounting plate (12) being slidably arranged on the frame (1), characterized in that: The frame (1) is fixedly provided with a lower cylinder (3); the bottom of the outer surface of the mounting plate (12) is fixedly mounted with an upper cylinder (2); the top of the outer surface of the mounting plate (12) is fixedly connected to a mounting plate (14); the bottom of the upper cylinder (2) is fixedly connected to a first electric telescopic rod (13); a first slot (21) is provided in the upper cylinder (2); a second slot (31) is provided in the lower cylinder (3); and a third slot (16) is provided in the first electric telescopic rod (13); The first slot (21), the second slot (31) and the third slot (16) are provided with electric wire bodies (15); the inner walls of the upper tube (2) and the lower tube (3) are provided with a plurality of groups of telescopic slots (32); a clamping assembly (4) is provided in the telescopic slot (32); the clamping assembly (4) comprises a first corrugated tube (41) provided on the inner wall of the telescopic slot (32); an end of the first corrugated tube (41) away from the telescopic slot (32) is fixedly connected to a clamping head (42); and the plurality of groups of clamping heads (42) are provided in a ring shape; The lower cylinder (3) is provided with a size adjustment component (5), the size adjustment component (5) comprising a sliding plate (51) which is slidingly sealed and arranged in the pressure chamber (33), a circle of electromagnets (52) being fixedly installed at the bottom of the sliding plate (51), a circle of first contact rings (53) being fixedly sleeved at the bottom end of the side surface of the sliding plate (51), an iron ring (55) being slidingly sealed and arranged in the pressure chamber (33), a thrust spring (54) being fixedly connected to the top of the iron ring (55), the top of the thrust spring (54) being fixedly connected to the bottom of the outer surface of the sliding plate (51), a second contact ring (56) being fixedly installed on the inner wall of the pressure chamber (33), a hose (57) being fixedly inserted at the bottom of the pressure chamber (33), one end of the hose (57) passing through the pressure chamber (33) and extending to the outside of the lower cylinder (3) and being connected to the bellows, and a pressure sensor (58) being fixedly installed on the surface of the clamping head (42).

2. According to claim 1, an automatic detection device for tensile strength of electric wires and cables, characterized in that: A second electric telescopic rod (6) is fixedly mounted on the frame (1); the telescopic end of the second electric telescopic rod (6) extends into the interior of the pressure chamber (33); the thrust spring (54) is sleeved on the telescopic end of the second electric telescopic rod (6); and the iron ring (55) is slidably sealed and sleeved on the outer surface of the telescopic end of the second electric telescopic rod (6).

3. The automatic tensile strength testing device for electric wires and cables according to claim 2 is characterized in that: A straightening component (7) is arranged in the upper cylinder (2), a sliding cavity (22) is provided in the upper cylinder (2), the sliding cavity (22) is communicated with the telescopic groove (32), the sliding cavity (22) allows the clamping component (4) in the upper cylinder (2) to slide up and down, and the clamping component (4) is fixedly installed in the telescopic groove (32) in the lower cylinder (3).

4. The automatic tensile strength testing device for electric wires and cables according to claim 3 is characterized by: The upper tube (2) is provided with a plurality of first slide grooves (23). The straightening assembly (7) comprises a second bellows (71) fixedly mounted on the inner wall of the first slide groove (23). The telescopic end of the second bellows (71) is fixedly connected to an end of the first bellows (41) close to the hose (57). The telescopic end of the second bellows (71) is located at the bottom of the second bellows (71). A gas flow meter (72) is fixedly arranged on the second bellows (71). An electric valve (73) is also fixedly arranged on the second bellows (71). The electric valve (73) is located above the gas flow meter (72). The electric valve (73) and the gas flow meter (72) can slide in the first slide groove (23). The first slide groove (23) extends to the outside of the upper tube (2). The upper tube (2) is also provided with a plurality of second slide grooves (24). The second slide grooves (24) allow the hose (57) to slide up and down.

5. The automatic tensile strength testing device for electric wires and cables according to claim 4 is characterized in that: A conductive spring (43) is sleeved on the outer surface of the first bellows (41), one end of the conductive spring (43) is fixedly connected to the clamping head (42), and the other end of the conductive spring (43) is fixedly connected to the inner wall of the telescopic slot (32).

6. The automatic tensile strength testing device for electric wires and cables according to claim 5 is characterized by: The dimensions of the plurality of groups of clamping heads (42) are the same as the dimensions of the first slot (21), the second slot (31) and the third slot (16), and the dimensions of the sliding plate (51) are the same as the dimensions of the clamping heads (42).

7. The automatic tensile strength testing device for electric wires and cables according to claim 6 is characterized by: A plurality of groups of glass plates (8) are fixedly mounted on the telescopic end of the first electric telescopic rod (13), and the telescopic end of the first electric telescopic rod (13) is fixedly connected to the top end of the outer surface of the lower tube (3).

8. The automatic tensile strength testing device for electric wires and cables according to claim 7 is characterized by: The first contact ring (53) is electrically connected to the second contact ring (56), the first contact ring (53) is electrically connected to the electromagnet (52), and the thickness of the iron ring (55) is smaller than the inner diameter of the hose (57).

9. The automatic tensile strength testing device for electric wires and cables according to claim 8, characterized in that: The pressure sensor (58) is electrically connected to the conductive spring (43), the pressure sensor (58) is electrically connected to the control console (11), and the first electric telescopic rod (13) and the second electric telescopic rod (6) are electrically connected to the control console (11).

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