Steel cord fracture tensile test device

Abstract

The invention relates to the technical field of steel cord tensile tests, and discloses a steel cord breaking tensile test device which comprises a bottom plate, the stretching device is fixed on the top surface of the bottom plate, and a moving seat capable of sliding up and down is arranged on the stretching device; the two connecting rods are fixed on the side surface of the movable seat; the transverse rod is fixed to the ends, away from the moving seat, of the two connecting rods; the plurality of sliding rails are fixed on the top surface of the bottom plate; the sliding seats are assembled on the sliding rails in a sliding mode respectively. The movable frame and the movable cover are driven to move by rotating the lead screw, synchronous driving of the multiple pressing rods and the pressing plates can be achieved, the pressing plates gradually get close to each other and stably press the steel cord on the wheel body, the winding type pressing and fixing mode increases the contact area between the steel cord and the pressing plates, and the steel cord pressing and fixing efficiency is improved. And the fixing stability is improved, and the device can flexibly adapt to steel cords of different sizes.

Description

Technical Field

[0001] The invention relates to the technical field of steel cord tensile testing, and in particular to a steel cord breaking tensile testing device. Background Art

[0002] The steel cord breaking tensile test device is a test device specially used to measure the breaking strength, breaking force, tensile load, tensile strength and other mechanical performance indicators of steel cord during the stretching process. It is widely used in tire manufacturing, metal products, materials science and other fields to ensure that the quality of steel cord meets the relevant standards and requirements.

[0003] After searching, the Chinese patent with the announcement number CN117907005B discloses a steel cord sampling machine and a steel cord testing device, including a frame, a tensile testing machine, a connecting frame, and a clamp. The tensile testing machine is installed on the top of the frame, and the connecting frame is connected to the test beam of the tensile testing machine and the middle of the top of the frame. The two connecting frames are on the same axis, and the two connecting frames are installed with a clamp for clamping the steel cord. In the above scheme, before testing the steel cord, it is only necessary to pull out the steel cord, and then the steel cord can be clamped by the arc clamp, the clamping plate one and the clamping plate two, and then the steel cord is erected and moved to the clamp by the driving motor, that is, the present invention can automatically clamp and sample the steel cord and transport it to the clamp for clamping after only pulling out the steel cord, which is more convenient to operate. However, the above scheme still has the following shortcomings when it is actually used:

[0004] When the above scheme performs strength testing on the steel cord, the device uses a clamp to clamp the end position of the steel cord. The clamp is composed of two clamps that can be close to each other. The clamp uses the two clamps to jointly press the steel cord. However, due to its slender shape and circular cross-section, the contact area between the steel cord and the clamp clamp is very limited. The limited contact area may cause the clamp's clamping force on the steel cord to be unevenly distributed, increasing the risk of unstable clamping. Due to the small contact area, the clamp may find it difficult to provide sufficient stability and reliability when clamping the steel cord. During the tensile test, the steel cord may slip or deviate from the predetermined direction due to unstable clamping, thereby affecting the accuracy of the test results.

[0005] Therefore, it is necessary to design a steel cord breaking tensile test device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a steel cord breaking tensile test device.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A steel cord breaking tensile test device, comprising:

[0009] Base plate;

[0010] A stretching device is fixed on the top surface of the bottom plate, and a movable seat that can slide up and down is provided on the stretching device;

[0011] Two connecting rods are fixed on the sides of the moving seat;

[0012] A cross bar, fixed to one end of the two connecting rods away from the moving seat;

[0013] A plurality of slide rails, all fixed on the top surface of the bottom plate;

[0014] A plurality of slide seats are respectively slidably assembled on the plurality of slide rails;

[0015] A plurality of clamping structures are arranged between the base plate and the cross bar, and the clamping structure is composed of a connecting rope, a tension feedback module and two clamping members. One end of the connecting rope is connected to the cross bar, and the other end is connected to the tension feedback module. One of the clamping members is installed on the tension feedback module, and the other clamping member is fixed on the top surface of the base plate. The two clamping members are arranged opposite to each other, and each of the clamping members is composed of a winding structure, a covering structure, a clamping structure, a driving structure and a positioning structure.

[0016] As a preferred technical solution of the present invention, the winding structure includes:

[0017] A mounting plate, arranged on the input end of the tension feedback module;

[0018] A wheel axle is fixed on the side of the mounting plate, and a slot is formed at one end of the wheel axle;

[0019] The wheel body is rotatably mounted on the wheel axle.

[0020] As a preferred technical solution of the present invention, the cover structure includes:

[0021] An insertion rod is movably inserted in the slot, a guide block is fixed on the insertion rod, a guide groove is provided on the slot wall of the slot, the guide block is slidably arranged in the guide groove, and one end of the insertion rod extends to the outside of the slot;

[0022] The sliding cover is fixed to one end of the insertion rod located outside the slot, one end of the sliding cover is a closed surface, and the other end is an open surface, and the open end of the sliding cover is arranged opposite to the wheel body.

[0023] As a preferred technical solution of the present invention, the pressing structure includes:

[0024] A plurality of pressure rods, all of which pass through the sliding cover and are slidably connected to the sliding cover;

[0025] A plurality of collars are respectively fixed on the plurality of pressure rods;

[0026] A plurality of first springs, one end of which is respectively connected to the plurality of said collars, and the other end of which is connected to the said sliding cover;

[0027] A plurality of pressing plates are respectively fixed to one end of a plurality of the pressing rods located inside the sliding cover;

[0028] The avoidance opening is arranged on the side of the sliding cover.

[0029] As a preferred technical solution of the present invention, each of the clamping plates has an arc-shaped structure, and anti-slip ribs are provided on the side surfaces of the clamping plates.

[0030] As a preferred technical solution of the present invention, the driving structure includes:

[0031] A fixing frame fixed on the closed surface of the sliding cover;

[0032] A screw rod passes through the fixing frame and is rotationally connected to the fixing frame;

[0033] Two guide rods are both fixed on the sides of the fixing frame;

[0034] A movable frame, threadedly sleeved on the screw rod, and the movable frame is slidably sleeved on two guide rods;

[0035] The movable cover is fixedly connected to the movable frame. The movable cover is arranged opposite to the sliding cover. The opening of one end of the movable cover facing the sliding cover is larger than the opening of the other end away from the sliding cover.

[0036] As a preferred technical solution of the present invention, the positioning structure includes:

[0037] An assembly frame, fixed to a side of the mounting plate;

[0038] A pull rod passes through the assembly frame and is slidably connected to the assembly frame, and a transverse plate is fixed to one end of the pull rod close to the mounting plate;

[0039] Two positioning rods are fixed on the side of the horizontal plate;

[0040] A second spring, one end of which is connected to the assembly frame, and the other end of which is connected to the pull rod;

[0041] Two positioning holes are both opened on the side of the wheel body, and the two positioning rods are respectively inserted into the two positioning holes.

[0042] As a preferred technical solution of the present invention, each of the slide rails is provided with an anti-splash structure, and the stretching device is provided with an inflatable structure;

[0043] The anti-splash structure comprises:

[0044] A connecting plate, one end of which is fixedly connected to the slide rail;

[0045] A vertical shaft, fixed to an end of the connecting plate away from the slide rail;

[0046] Two shields are both rotatably mounted on the vertical axis, and the two shields are arranged in a mirror image around the vertical axis;

[0047] Two execution structures, the two baffles are connected to the connecting plate through the execution structures.

[0048] As a preferred technical solution of the present invention, the execution structure includes:

[0049] A sealing cylinder, rotatably mounted on the connecting plate;

[0050] A first sliding plug, sealingly and slidably connected to the inner surface of the sealing cylinder;

[0051] A third spring, one end of which is connected to the sealing cylinder, and the other end of which is connected to the first sliding plug;

[0052] A push rod has one end fixedly connected to the first sliding plug and the other end extending to the outside of the sealing cylinder. The end of the push rod located outside the sealing cylinder is rotatably connected to the blocking cover.

[0053] As a preferred technical solution of the present invention, the inflatable structure comprises:

[0054] Two side plates, one of which is fixed to the side of the stretching device, and the other is fixed to the side of the moving seat, and the two side plates are arranged opposite to each other;

[0055] an outer cylinder fixed to a side plate located on the stretching device;

[0056] a second sliding plug, sealingly and slidingly connected in the outer cylinder;

[0057] A connecting rod, one end of which is fixedly connected to the second sliding plug, and the other end of which extends to the outside of the outer cylinder, wherein the end of the connecting rod located outside the outer cylinder is fixedly connected to the side plate on the moving seat;

[0058] A connecting pipe has one end connected to the outer cylinder and the other end connected to the sealing cylinder.

[0059] The present invention has the following beneficial effects:

[0060] 1. By rotating the screw to drive the moving frame and the moving cover to move, it is possible to achieve synchronous driving of several pressure rods and pressing plates, so that the pressing plates gradually approach and stably press the steel cord on the wheel body. This winding pressing and fixing method not only increases the contact area between the steel cord and the pressing plate, improves the stability of the fixation, but also enables the device to flexibly adapt to steel cords of different sizes, expands the scope of application of the device, and thus improves the efficiency and accuracy of steel cord fixation and subsequent testing;

[0061] 2. The device can install steel cords between every two facing clamps, and perform synchronous tensile tests on several steel cords by moving the crossbar upward. This method greatly shortens the test time and reduces the time for workers to wait for the clamp to reset and perform independent clamping and loosening operations, thereby improving the test efficiency. When a large number of steel cords need to be tested, this synchronous testing method can significantly reduce the labor intensity of workers and make the test process more convenient and efficient;

[0062] 3. The device can automatically start the anti-splash protection mechanism when the steel cord is stretched, and drive a series of mechanical linkages by moving the moving seat upward, so that the two shields can automatically cover and cover the stretched steel cord. This setting not only effectively avoids the splash generated when the steel cord breaks and causes harm to the workers, providing important safety guarantees, but also eliminates the need for workers to manually pass the steel cord through the cylinder when clamping the steel cord, greatly simplifying the operation process and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a structural schematic diagram of a steel cord breaking tensile test device proposed by the present invention;

[0064] Figure 2 This is a structural schematic diagram of a steel cord breaking tensile test device proposed by the present invention from another perspective;

[0065] Figure 3 This is a schematic cross-sectional structure diagram of a steel cord breaking tensile test device proposed by the present invention;

[0066] Figure 4 It is a schematic diagram of the structure of the slide rail, the slide seat and the two clamping parts;

[0067] Figure 5 for Figure 1 A magnified view of the structure at A;

[0068] Figure 6 for Figure 3 A magnified view of the structure at B;

[0069] Figure 7 for Figure 4 A magnified view of the structure at C;

[0070] Figure 8 is a structural schematic diagram of the compression structure;

[0071] Fig. 9 It is a schematic diagram of the exploded structure of the clamping part;

[0072] Fig.10 It is a schematic diagram of the structure of the splash-proof structure;

[0073] Fig.11 It is a schematic cross-sectional view of two execution structures;

[0074] Fig.12 for Fig. 9 A magnified view of the structure at D;

[0075] Fig.13 for Fig.11 Enlarged view of the structure at E.

[0076] In the figure: 1, bottom plate; 2, stretching device; 3, moving seat; 4, connecting rod; 5, cross bar; 6, slide rail; 7, slide seat; 81, connecting rope; 82, tension feedback module; 831, mounting plate; 832, wheel axle; 833, wheel body; 841, plug rod; 842, sliding cover; 851, pressure rod; 852, collar; 853, first spring; 854, pressing plate; 855, avoidance; 861, fixing frame; 862, wire Rod; 863, guide rod; 864, movable frame; 865, movable cover; 871, assembly frame; 872, pull rod; 873, positioning rod; 874, second spring; 875, positioning port; 91, connecting plate; 92, vertical axis; 93, blocking cover; 101, sealing cylinder; 102, first sliding plug; 103, third spring; 104, push rod; 111, side plate; 112, outer cylinder; 113, second sliding plug; 114, connecting rod. DETAILED DESCRIPTION

[0077] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0078] Reference Figure 1-13 A steel cord breaking tensile test device comprises a bottom plate 1; a tensile device 2 fixed on the top surface of the bottom plate 1, and a movable seat 3 which can slide up and down is arranged on the tensile device 2; two connecting rods 4, both fixed on the side of the movable seat 3; a cross bar 5, fixed on one end of the two connecting rods 4 away from the movable seat 3; a plurality of slide rails 6, both fixed on the top surface of the bottom plate 1; a plurality of slide seats 7, respectively slidably assembled on the plurality of slide rails 6;

[0079] The steel cord breaking tensile test device also includes a plurality of clamping structures, all of which are arranged between the bottom plate 1 and the cross bar 5. The clamping structure is composed of a connecting rope 81, a tension feedback module 82 and two clamping members. One end of the connecting rope 81 is connected to the cross bar 5, and the other end is connected to the tension feedback module 82. One of the clamping members is installed on the tension feedback module 82, and the other clamping member is fixed on the top surface of the bottom plate 1. The two clamping members are arranged opposite to each other, and each clamping member is composed of a winding structure, a covering structure, a pressing structure, a driving structure and a positioning structure.

[0080] The winding structure includes: a mounting plate 831 (such as Figure 7 ), which is arranged at the input end of the tension feedback module 82; the wheel shaft 832 (as shown Fig.12 As shown), fixed on the side of the mounting plate 831, one end of the wheel shaft 832 is provided with a slot; the wheel body 833 is rotatably mounted on the wheel shaft 832, and the cover structure includes: an insertion rod 841, which is movably inserted in the slot, a guide block is fixed on the insertion rod 841, a guide slot is provided on the slot wall, the guide block is slidably arranged in the guide slot, and one end of the insertion rod 841 extends to the outside of the slot; a sliding cover 842 is fixed to one end of the insertion rod 841 located outside the slot, one end of the sliding cover 842 is a closed surface, and the other end is open, and the open end of the sliding cover 842 is arranged opposite to the wheel body 833, and the pressing structure includes: a plurality of pressing rods 851 (such as Figure 8 As shown), all pass through the sliding cover 842 and are slidably connected to the sliding cover 842; a plurality of collars 852 are respectively fixed on a plurality of pressure rods 851; a plurality of first springs 853, one end of which is respectively connected to the plurality of collars 852, and the other end is connected to the sliding cover 842; a plurality of clamping plates 854 are respectively fixed to one end of the plurality of pressure rods 851 located inside the sliding cover 842, each clamping plate 854 is an arc-shaped structure, and the side of the clamping plate 854 is provided with anti-slip ribs; an avoidance port 855 is opened on the side of the sliding cover 842, and the driving structure includes : A fixed frame 861 is fixed on the closed surface of the sliding cover 842; a screw rod 862 passes through the fixed frame 861 and is rotatably connected to the fixed frame 861; two guide rods 863 are fixed to the side of the fixed frame 861; a mobile frame 864 is threadedly sleeved on the screw rod 862, and the mobile frame 864 is slidably sleeved on the two guide rods 863; a mobile cover 865 is fixedly connected to the mobile frame 864, and the mobile cover 865 is arranged opposite to the sliding cover 842, and the opening of the end of the mobile cover 865 facing the sliding cover 842 is larger than the opening of the end away from the sliding cover 842;

[0081] The staff first winds one end of the steel cord around the wheel body 833, then pulls the sliding cover 842 so that the sliding cover 842 is placed on the wheel body 833. When the sliding cover 842 moves, the plug rod 841 is inserted into the slot on the wheel axle 832. The plug rod 841 and the slot limit the movement of the sliding cover 842. In addition, a guide block is fixed on the plug rod 841, and a guide groove is provided in the slot, and the guide block slides in the guide groove. The setting of the guide block and the guide groove can improve the stability of the sliding cover 842 during movement. When the moving frame 864 moves, the moving cover 865 The movable cover 865 will also move accordingly. During the movement of the movable cover 865, the movable cover 865 can squeeze the end positions of the plurality of pressure rods 851. Since the opening of the end of the movable cover 865 facing the sliding cover 842 is larger than the opening of the end away from the sliding cover 842, the movable cover 865 can squeeze the plurality of pressure rods 851 when it moves, so that the plurality of pressure rods 851 move synchronously. When the plurality of pressure rods 851 move, they can drive the plurality of pressing plates 854 to move, so that the plurality of pressing plates 854 gradually approach the wheel body 833, until the plurality of pressing plates 854 jointly press the steel cord onto the wheel body 833.

[0082] The positioning structure includes: an assembly frame 871, fixed on the side of the mounting plate 831; a pull rod 872, passing through the assembly frame 871 and slidably connected to the assembly frame 871, and a cross plate is fixed to the end of the pull rod 872 close to the mounting plate 831; two positioning rods 873, both fixed on the side of the cross plate; a second spring 874, one end of which is connected to the assembly frame 871 and the other end is connected to the pull rod 872; two positioning ports 875, both opened on the side of the wheel body 833, the two positioning rods 873 are respectively inserted into the two positioning ports 875, when the steel cord is removed, the worker The operator first pulls the pull rod 872. When the pull rod 872 moves, it can drive the cross plate and the two positioning rods 873 to move until the two positioning rods 873 move out of the two positioning holes 875, thereby releasing the restriction of the two positioning rods 873 on the wheel body 833, and the wheel body 833 can rotate freely. In this case, the operator can directly pull the steel cord off the wheel body 833. During the process of the steel cord falling off the wheel body 833, the wheel body 833 can rotate. The rotatable wheel body 833 facilitates the falling off of the steel cord, providing convenience for the removal of the steel cord.

[0083] Each slide rail 6 is provided with an anti-splash structure, and the stretching device 2 is provided with an inflatable structure; the anti-splash structure includes: a connecting plate 91 (such as Figure 4 As shown), one end is fixedly connected to the slide rail 6; the vertical shaft 92 (as shown Fig.10As shown), fixed to the end of the connecting plate 91 away from the slide rail 6; two shields 93, both rotatably mounted on the vertical shaft 92, the two shields 93 are mirror-imaged around the vertical shaft 92; two execution structures, the two shields 93 are connected to the connecting plate 91 through the execution structure, the execution structure includes: a sealing cylinder 101 (as shown Fig.13 As shown), it is rotatably mounted on the connecting plate 91; the first sliding plug 102 is sealingly and slidably connected to the inner surface of the sealing cylinder 101; the third spring 103, one end of which is connected to the sealing cylinder 101, and the other end is connected to the first sliding plug 102; the push rod 104, one end of which is fixedly connected to the first sliding plug 102, and the other end extends to the outside of the sealing cylinder 101, and the push rod 104 is located outside the sealing cylinder 101. One end is connected to the baffle 93 between the push rod 104 and the baffle 93. When the gas enters the sealing cylinder 101, the gas can push the first sliding plug 102 to move, and the first sliding plug 102 can drive the push rod 104 to move when it moves. Since the sealing cylinder 101 is rotatably mounted on the connecting plate 91 On the top, the push rod 104 is rotatably mounted on the blocking cover 93, so when the push rod 104 moves, it can push the blocking cover 93 to rotate. Based on the above process, during the upward movement of the moving seat 3, a number of push rods 104 can push a number of blocking covers 93 to move (the specific principle will be explained later), so that the two blocking covers 93 on the same vertical axis 92 perform a covering action. When the two blocking covers 93 on the same vertical axis 92 are covered together, the two blocking covers 93 can jointly form a cylindrical structure and cover the stretched steel cord. When the steel cord is covered, the splash generated when the steel cord breaks will be blocked by the two blocking covers 93, so as to avoid the splash from causing harm to the staff.

[0084] The inflatable structure includes: two side panels 111 (such as Figure 6 As shown in the figure, one side plate 111 is fixed to the side of the stretching device 2, and the other side plate 111 is fixed to the side of the moving seat 3, and the two side plates 111 are arranged opposite to each other; the outer cylinder 112 is fixed to the side plate 111 located on the stretching device 2; the second sliding plug 113 is sealingly slidably connected in the outer cylinder 112; the connecting rod 114 has one end fixedly connected to the second sliding plug 113 and the other end extending to the outside of the outer cylinder 112, and the end of the connecting rod 114 located outside the outer cylinder 112 is connected to the moving seat The connecting pipe has one end connected with the outer cylinder 112 and the other end connected with the sealing cylinder 101. When the movable seat 3 moves upward, the movable seat 3 can drive the side plate 111 thereon to move, and the moving side plate 111 can drive the connecting rod 114 to move. When the connecting rod 114 moves, it can drive the second sliding plug 113 to move. During the movement, the second sliding plug 113 can press the gas inside the outer cylinder 112 into the corresponding sealing cylinder 101 through the connecting pipe.

[0085] The specific working principle of the present invention is as follows:

[0086] When the steel cord breaking tensile test device proposed by the present invention is used, the staff uses two clamping members facing each other to clamp and fix the steel cord. Specifically, the staff first winds one end of the steel cord around the wheel body 833, so that the steel cord is wound around the wheel body 833 for several turns. During this process, the two positioning rods 873 are respectively inserted into the two positioning openings 875 on the wheel body 833. Under the limiting action of the two positioning rods 873 and the two positioning openings 875, the wheel body 833 cannot rotate. When the wheel body 833 is fixed, The steel cord can be wound around the wheel body 833 more smoothly. Then, the staff pulls the sliding cover 842 so that the sliding cover 842 is covered on the wheel body 833. When the sliding cover 842 moves, the insertion rod 841 will be inserted into the slot on the wheel shaft 832. The insertion rod 841 and the slot play a limiting role in the movement of the sliding cover 842. In addition, a guide block is fixed on the insertion rod 841, and a guide groove is provided in the slot, and the guide block slides in the guide groove. The setting of the guide block and the guide groove can improve the stability of the sliding cover 842 during the movement process.

[0087] When the sliding cover 842 is covered on the wheel body 833, the staff turns the knob at one end of the screw rod 862 to rotate the screw rod 862. Under the limiting action of the two guide rods 863, the screw rod 862 can drive the movable frame 864 to move when it rotates. When the movable frame 864 moves, the movable cover 865 will also move accordingly. During the movement of the movable cover 865, the movable cover 865 can squeeze the end positions of the plurality of pressure rods 851. Since the opening of the end of the movable cover 865 facing the sliding cover 842 is larger than the opening of the end away from the sliding cover 842, the movable cover 865 can squeeze the plurality of pressure rods 851 when it moves. The plurality of pressure rods 851 are moved synchronously, and the movement of the plurality of pressure rods 851 can drive the plurality of pressing plates 854 to move, so that the plurality of pressing plates 854 gradually approach the wheel body 833, until the plurality of pressing plates 854 jointly press the steel cord onto the wheel body 833. In this case, the steel cord and the plurality of arc-shaped pressing plates 854 have a larger contact area, so that the plurality of pressing plates 854 can stably fix the end of the steel cord onto the wheel body 833, thereby achieving stable fixation of the steel cord. In addition, this winding type of pressing and fixing method can also fix steel cords of different sizes, which expands the application range of the device.

[0088] After fixing the steel cord, the staff starts the stretching device 2 to move the movable seat 3 on the stretching device 2. When the movable seat 3 moves, it can drive the cross bar 5 to move through the two connecting rods 4. When the cross bar 5 moves upward, it can drive the tension feedback modules 82 to move through the connecting ropes 81. When the tension feedback modules 82 move upward, the clamps on the tension feedback modules 82 will also move upward, so that the steel cord between the two opposite clamps can be stretched. Furthermore, the staff can install the steel cord between every two opposite clamps. When the cross bar 5 moves upward, the device can Synchronous tensile test of several steel cords. In the traditional tensile test of steel cords, the test tension needs to be pulled slowly, so the movement of the clamp is usually very slow, and the staff usually waits for a long time for the clamp to reset. After a long wait, the staff clamps the wires again. When testing more wires in a concentrated manner, such waiting and independent clamping and loosening operations each time will make the entire test process cumbersome. Compared with the traditional single-wire test method, this test method can perform tensile tests on multiple steel cords in a short time, which improves the test efficiency of steel cords;

[0089] Each slide rail 6 is provided with an anti-splash structure. The two shields 93 in the anti-splash structure can automatically cover the steel cord when the steel cord is stretched, so as to prevent the splash generated when the steel cord is broken from causing harm to the staff. Specifically, when the movable seat 3 moves upward, the movable seat 3 can drive the side plate 111 thereon to move, and the movable side plate 111 can drive the connecting rod 114 to move. When the connecting rod 114 moves, it can drive the second sliding plug 113 to move. During the movement of the second sliding plug 113, the gas inside the outer cylinder 112 can be pressed into the corresponding sealing cylinder 101 through the connecting pipe. When the gas enters the sealing cylinder 101, the gas can push the first sliding plug 102 to move. When the first sliding plug 102 moves, it can drive the push rod 104 to move. Since the sealing cylinder 101 is rotatably installed on the connecting rod 114, On the connecting plate 91, the push rod 104 is rotatably mounted on the blocking cover 93, so that the push rod 104 can push the blocking cover 93 to rotate when it moves. Based on the above process, in the process of the moving seat 3 moving upward, a plurality of push rods 104 can push a plurality of blocking covers 93 to move, so that the two blocking covers 93 on the same vertical axis 92 perform a covering action. When the two blocking covers 93 on the same vertical axis 92 are covered together, the two blocking covers 93 can jointly form a cylindrical structure and cover the stretched steel cord. When the steel cord is covered, the splash generated when the steel cord breaks will be blocked by the two blocking covers 93 to prevent the splash from causing harm to the staff. This arrangement can not only provide protection for the staff, but also the automatic covering action does not require the staff to pass the steel cord through a cylindrical object when clamping the steel cord, and the operation is convenient.

[0090] It should be noted that after the inspection, the staff needs to remove the steel cord from the wheel body 833. When removing the steel cord, the staff first pulls the pull rod 872. When the pull rod 872 moves, it can drive the cross plate and the two positioning rods 873 to move until the two positioning rods 873 move out of the two positioning ports 875, thereby releasing the restriction of the two positioning rods 873 on the wheel body 833, and the wheel body 833 can rotate freely. In this case, the staff can directly pull the steel cord off the wheel body 833. During the process of the steel cord falling off the wheel body 833, the wheel body 833 can rotate. The rotatable wheel body 833 facilitates the falling of the steel cord and provides convenience for the removal of the steel cord. In addition, although the connection between the cross bar 5 and the connecting rod 4 may be subjected to greater force during the stretching process, the design of the entire stretching device fully considers the uniform distribution of force. The structure of the connecting rod 4 and the cross bar 5 is based on the principle of and material selection are intended to minimize the attenuation and deviation of force during transmission, ensuring that the tension on each section of steel cord is as consistent as possible. In addition, the design of the tension feedback module 82 also plays a key role. The technical solution in this application does not require that all steel cords must break at the same time, but focuses on that under the same test conditions, each section of steel cord can show consistent breaking characteristics or performance differences. Furthermore, in actual operation, the moving speed of the stretching device and the adjustment function of the tension feedback module can be precisely controlled to ensure that after the applied force is greater than 80% of the minimum breaking force, the speed of applying stress can be maintained within the range of about 10MPa / s. Even if one of the steel cords breaks, due to the timely response and adjustment of the tension feedback module 82, the force on other steel cords will not suddenly increase to an unreasonable level, thereby avoiding overall test failure caused by local breakage;

[0091] It should also be noted that the steel cord clamping method proposed in this scheme has the advantage of providing a more stable, flexible and safe fixing method compared with the simple wire bundling, while greatly improving the convenience of operation and test efficiency. Specifically, this scheme realizes the winding and clamping fixation of the steel cord end by designing precise mechanical structures, such as wheel body 833, positioning rod 873, sliding cover 843, mobile frame 864, clamping plate 854 and other components. This fixing method not only ensures a larger contact area between the steel cord and the clamping plate 854, thereby achieving a stable fixing effect, but also can adapt to steel cords of different sizes, significantly expanding the scope of application of the device. In contrast, simple wire bundling methods are often difficult to ensure the stability and firmness of the fixation, especially during tensile tests, the wire may loosen due to uneven force or sliding of the steel cord, resulting in the accuracy of the test results being affected. In addition, the wire bundling method lacks adaptability to steel cords of different sizes, and requires frequent replacement of wires of different specifications, which increases the complexity and time cost of the operation.

[0092] The above description is only a preferred specific implementation manner of the present invention, but 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 scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel cord breaking tensile test device, characterized in that: include: Bottom plate (1); A stretching device (2) is fixed on the top surface of the bottom plate (1), and a movable seat (3) that can slide up and down is provided on the stretching device (2); Two connecting rods (4) are both fixed on the side of the moving seat (3); A cross bar (5) fixed to one end of the two connecting rods (4) away from the movable seat (3); A plurality of slide rails (6) are fixed on the top surface of the bottom plate (1); A plurality of slide seats (7) are respectively slidably assembled on the plurality of slide rails (6); A plurality of clamping structures are arranged between the base plate (1) and the cross bar (5), and the clamping structures are composed of a connecting rope (81), a tension feedback module (82) and two clamping members. One end of the connecting rope (81) is connected to the cross bar (5), and the other end is connected to the tension feedback module (82). One of the clamping members is installed on the tension feedback module (82), and the other clamping member is fixed on the top surface of the base plate (1). The two clamping members are arranged opposite to each other, and each of the clamping members is composed of a winding structure, a covering structure, a clamping structure, a driving structure and a positioning structure.

2. A steel cord breaking tensile test device according to claim 1, characterized in that: The winding structure comprises: A mounting plate (831) is arranged on the input end of the tension feedback module (82); A wheel axle (832) is fixed on the side of the mounting plate (831), and a slot is formed at one end of the wheel axle (832); The wheel body (833) is rotatably mounted on the wheel shaft (832).

3. A steel cord breaking tensile test device according to claim 2, characterized in that: The cover structure comprises: An insertion rod (841) is movably inserted into the slot, a guide block is fixed on the insertion rod (841), a guide groove is provided on the slot wall of the slot, the guide block is slidably arranged in the guide groove, and one end of the insertion rod (841) extends to the outside of the slot; The sliding cover (842) is fixed to one end of the insertion rod (841) located outside the slot. One end of the sliding cover (842) is a closed surface, and the other end is open. The open end of the sliding cover (842) is arranged opposite to the wheel body (833).

4. A steel cord breaking tensile test device according to claim 3, characterized in that: The compression structure comprises: A plurality of pressure rods (851) each pass through the sliding cover (842) and are slidably connected to the sliding cover (842); A plurality of collars (852) are respectively fixed on the plurality of pressure rods (851); A plurality of first springs (853), one end of which is respectively connected to the plurality of collars (852), and the other end of which is connected to the sliding cover (842); A plurality of pressing plates (854) are respectively fixed to one end of the plurality of pressing rods (851) located inside the sliding cover (842); The avoidance opening (855) is provided on the side of the sliding cover (842).

5. A steel cord breaking tensile test device according to claim 4, characterized in that: Each of the pressing plates (854) has an arc-shaped structure, and anti-slip ribs are arranged on the side of the pressing plate (854).

6. A steel cord breaking tensile test device according to claim 4, characterized in that: The driving structure comprises: A fixing frame (861) fixed on the closed surface of the sliding cover (842); A screw rod (862) passes through the fixing frame (861) and is rotationally connected to the fixing frame (861); Two guide rods (863) are both fixed on the side of the fixing frame (861); A movable frame (864) is threadedly sleeved on the screw rod (862), and the movable frame (864) is slidably sleeved on two guide rods (863); The movable cover (865) is fixedly connected to the movable frame (864). The movable cover (865) is arranged opposite to the sliding cover (842). The opening of one end of the movable cover (865) facing the sliding cover (842) is larger than the opening of the other end away from the sliding cover (842).

7. A steel cord breaking tensile test device according to claim 2, characterized in that: The positioning structure comprises: An assembly frame (871) fixed on a side of the mounting plate (831); A pull rod (872) passes through the assembly frame (871) and is slidably connected to the assembly frame (871), and a transverse plate is fixed to one end of the pull rod (872) close to the mounting plate (831); Two positioning rods (873), both fixed on the side of the horizontal plate; A second spring (874), one end of which is connected to the assembly frame (871), and the other end of which is connected to the pull rod (872); Two positioning openings (875) are both provided on the side of the wheel body (833), and the two positioning rods (873) are respectively inserted into the two positioning openings (875).

8. A steel cord breaking tensile test device according to claim 1, characterized in that: Each of the slide rails (6) is provided with an anti-splash structure, and the stretching device (2) is provided with an inflatable structure; The anti-splash structure comprises: A connecting plate (91), one end of which is fixedly connected to the slide rail (6); A vertical shaft (92) is fixed to an end of the connecting plate (91) away from the slide rail (6); Two baffles (93) are both rotatably mounted on the vertical shaft (92), and the two baffles (93) are arranged in a mirror image around the vertical shaft (92); Two execution structures, the two shields (93) are connected to the vertical shaft (92) through the execution structures.

9. A steel cord breaking tensile test device according to claim 8, characterized in that: The execution structure includes: A sealing cylinder (101) is rotatably mounted on the vertical shaft (92); A first sliding plug (102) is sealingly and slidably connected to the inner surface of the sealing cylinder (101); A third spring (103), one end of which is connected to the sealing cylinder (101), and the other end of which is connected to the first sliding plug (102); A push rod (104) has one end fixedly connected to the first sliding plug (102) and the other end extending to the outside of the sealing cylinder (101). The end of the push rod (104) located outside the sealing cylinder (101) is rotatably connected to the blocking cover (93).

10. A steel cord breaking tensile test device according to claim 9, characterized in that: The inflatable structure comprises: Two side plates (111), one of the side plates (111) is fixed on a side of the stretching device (2), and the other side plate (111) is fixed on a side of the movable seat (3), and the two side plates (111) are arranged opposite to each other; An outer cylinder (112) is fixed on a side plate (111) located on the stretching device (2); A second sliding plug (113) is sealingly and slidingly connected in the outer cylinder (112); A connecting rod (114), one end of which is fixedly connected to the second sliding plug (113), and the other end of which extends to the outside of the outer cylinder (112); the end of the connecting rod (114) located outside the outer cylinder (112) is fixedly connected to the side plate (111) on the movable seat (3); A connecting pipe, one end of which is connected to the outer cylinder (112), and the other end of which is connected to the sealing cylinder (101).

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