Tensile strength detection machine for testing composite polymer cable

Abstract

The invention relates to the technical field of composite polymer cable testing, and discloses a tensile strength detection machine for composite polymer cable testing, which comprises a detection table, and also comprises an operation box fixedly connected to the bottom of the detection table; the bottom plate is fixedly connected to the bottom of the operation box; the two box bodies are fixedly connected to the two sides of the top of the detection table respectively; the pushing mechanism is arranged on the detection table and is used for pulling the composite polymer cable; the discharging mechanism is arranged above the detection table and is used for pushing the tested composite polymer cable to be discharged; and the sliding assembly is arranged on the discharging mechanism and used for limiting the composite polymer cable. Through the arranged pushing mechanism, the two ends of the composite polymer cable fixed in the two movable blocks can be synchronously pushed to move, so that the synchronous pushing effect is achieved, and the tensile strength of the composite polymer cable is detected.

Description

Technical Field

[0001] The invention relates to the technical field of composite polymer cable testing, in particular to a tensile strength testing machine for composite polymer cable testing. Background Art

[0002] Composite polymer cable is a rope made of multiple polymer materials. It combines the advantages of different materials to meet specific application requirements. Composite polymer cable is usually woven from high-strength polymer fibers, such as ultra-high molecular weight polyethylene (UHMWPE) fiber, aramid, polyester fiber (PET), etc.

[0003] For example, the announcement number CN 209485859 U discloses a device for measuring the tensile strength of a mooring cable at a dock, comprising a base, a fixed seat fixedly connected to one side of the base, a crank provided above the fixed seat, the end of the crank penetrating the fixed seat, and the crank rotatably connected to the fixed seat, a driving gear fixed to the end of the crank, a rotating shaft rotatably connected to the base, a take-up drum and a driven gear respectively fixedly connected above the rotating shaft, and a cable provided on the take-up drum. One side of the cable is wound around the take-up drum, and the other end is placed inside the cavity. The fixing bolt is fixed horizontally so that the cable is not easy to fall off when testing the tension. The first pressure plate and the second pressure plate enable the cable and the wire rope to be fixed at the same time. By shaking the crank, the driving gear drives the driven gear to rotate, so that the take-up drum also rotates, the cable is tightened, the slider moves inside the slide slot, and the spring dynamometer is stretched to detect the tension at the same time. However, when the above device is testing the rope, by pulling the rope to rotate on the take-up drum, the rope will shrink during the rotation and produce a problem of deformation change. Therefore, a tensile strength testing machine for composite polymer cable testing is proposed to solve the above problem. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a tensile strength testing machine for testing composite polymer cables in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a tensile strength testing machine for composite polymer cable testing, including a testing platform, and also including: An operation box, fixedly connected to the bottom of the testing platform; A bottom plate, fixedly connected to the bottom of the operation box; Two boxes are fixedly connected to both sides of the top of the testing platform; A pushing mechanism, arranged on the detection platform, for pulling the composite polymer cable; A discharging mechanism, arranged above the testing platform, for pushing the tested composite polymer cable out; A sliding assembly, arranged on the discharging mechanism, for limiting the position of the composite polymer cable; Wherein, the driving mechanism comprises: An electric push rod is fixedly connected to the inner wall of the operation box, and the output end of the electric push rod movably passes through the operation box and is connected to a push plate; The two push rods are movably connected to the box body, and the outer sides of the push rods are fixedly connected to the push plate; A movable block is hinged on a side of the two push rods away from the push plate; A plurality of sliding rods 1 are fixedly connected to one side of the push rod, and the other side of the sliding rods 1 is slidably connected to the inner wall of the box body; The movable block is hollow inside, and a clamping mechanism is arranged inside the movable block for clamping and fixing the composite polymer cable.

[0006] Preferably, the clamping mechanism comprises: Two clamping blocks are arranged on the inner wall of the movable block; A second slide bar is fixedly connected to the inner wall of the movable block, and the clamping block is slidably connected to the outer wall of the second slide bar; A plurality of springs are arranged on the outer wall of the slide rod 2 and located outside the two clamping blocks, and are used to push the two clamping blocks closer to each other to clamp the composite polymer cable, and the two ends of the composite polymer cable are respectively fixedly connected with fixing rings to prevent the fixing rings and the composite polymer cable from moving.

[0007] Preferably, the clamping mechanism further comprises: A top block, fixedly connected to the top of the inner wall of the box; A push block is movably connected to the inner wall of the top block, and a second spring is provided on the inner wall thereof to push the push block to move downward; Two limit rods are connected to the push block through a push rod, and the limit rods are movably connected to the top block to limit the push block from being separated from the top block; The bottom of the push rod is in contact with the tops of the two push rods and the movable block.

[0008] Preferably, the clamping mechanism further comprises: A wedge block, fixedly connected to the clamping block; A wedge-shaped fixing block is fixedly connected to the inner wall of the box body and is located between the two push rods; Two wedge-shaped push rods are slidably connected to the inclined surface of the wedge-shaped fixing block; A telescopic spring connected to the inner sides of the two wedge-shaped push rods is used to push the two wedge-shaped push rods away from each other, and the outer wall of the wedge-shaped push rod is in contact with the inner inclined surface of the wedge block; A fixed rod is fixedly connected to one side of the inner wall of the movable block, and a push rod is slidably connected to the outer wall of the fixed rod, which is used to fit on one end of the composite polymer cable and the fixed ring to push the fixed ring out of the limit of the clamping block; Spring six is ​​sleeved on the outer wall of the fixed rod and fixedly connected with the pushing rod and the inner wall of the movable block to push the pushing rod to slide on the fixed rod toward one side of the fixed ring.

[0009] Preferably, the discharging mechanism comprises: A discharge plate, slidably connected above the detection table; Two discharge arc blocks are symmetrically and fixedly connected to the back of the discharge plate, and cooperate with the discharge plate to push the tested composite polymer cable backwards to discharge; The slide plate is fixedly connected to the discharge plate and the discharge arc block below, and slides above the detection table through two connecting blocks connected at the bottom thereof.

[0010] Preferably, the discharging mechanism further comprises: A U-shaped push block, slidably connected to the inner wall of the operation box; The round rod is fixedly connected to the inner wall of the operating box and movably connected to the U-shaped push block; Spring three, sleeved on the outer wall of the round rod, and pushing the U-shaped push block to move backward; Two shift rods are movably connected to the operation box respectively. The shift rod is fixedly connected to the inner side of the push plate, and the other side is movably plugged into the U-shaped push block.

[0011] Preferably, the sliding assembly comprises: A plurality of fixing blocks, two in a group and symmetrically fixedly connected to the inner side of the arc of the discharge plate and the discharge arc block; Two slide rails are fixedly connected to each set of fixed blocks; The two clamping blocks are connected to the outer wall of the composite polymer cable through bolts, and the upper and lower sides of the two clamping blocks slide on the slide rails respectively.

[0012] Preferably, the sliding assembly further comprises: Sliding rod three, fixedly connected to the inner side of each set of fixed blocks; A stopper is slidably connected to the outer wall of the slide bar 3, and the outer wall of the slide bar 3 is sleeved with a spring 4 for pushing the stopper away from the movable block; Two rectangular holes are respectively opened on the slide rail, and the stop block is movably connected with a second stop rod, and the second stop rod moves in the rectangular hole and fits with the inner side of the clamping block; The spring five is arranged in the stopper and pushes the stopper rod two to go deep into the rectangular hole.

[0013] The present invention adopts the above technical solution to bring the following beneficial effects: 1. The tensile strength testing machine for composite polymer cable testing can synchronously push the two ends of the composite polymer cable fixed in two movable blocks to move through the arranged pushing mechanism, so as to realize the synchronous pushing effect, so as to realize the tensile strength testing of the composite polymer cable.

[0014] 2. The tensile strength testing machine for testing composite polymer cables can clamp the composite polymer cables by means of the clamping mechanism, using two movable clamping blocks, and block the fixing ring through the elliptical hole formed between the two clamping blocks, so as to fix and limit the composite polymer cables; and then, by deflecting the movable block, and after the test, the movable block drives the two wedge-shaped push rods to contact the wedge-shaped fixing block, so as to push the two wedge-shaped blocks to release the limiting of the fixing ring by the clamping block, so as to cooperate with the spring six to push the push rod to move, so as to realize the discharge of the composite polymer cable and the fixing ring, thereby improving the discharge effect after the test.

[0015] 3. The tensile strength testing machine for composite polymer cable testing has a discharging mechanism. After the test is completed, the gear lever will be separated from the contact with the U-shaped push block for a while, so that under the push of spring three, the U-shaped push block is pushed to move, and the connecting block and the slide plate are driven to move synchronously, and the discharging plate and the discharging arc block are pushed to move at the same time, so as to push the composite polymer cable that is released after the test is completed, so as to realize auxiliary discharging and improve the test efficiency.

[0016] 4. The tensile strength testing machine for composite polymer cable testing can store force on spring six during testing through the sliding component provided. After the test is completed, spring six can push spring four to push lever two to move, so as to achieve reset and assist in replacing the composite polymer cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front structure of the present invention; Figure 2 It is a schematic diagram of the back structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 Schematic diagram of the explosion structure of the present invention Figure 1 ; Figure 5 Schematic diagram of the explosion structure of the present invention Figure 2 ; Figure 6 It is a schematic diagram of the cross-sectional structure of the clamping mechanism of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the clamping mechanism of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the sliding component of the present invention.

[0018] In the figure: 1, test table; 2, operation box; 3, bottom plate; 4, pushing mechanism; 41, electric push rod; 42, push plate; 43, push rod; 44, movable block; 45, slide bar 1; 5, clamping mechanism; 51, clamping block; 52, spring 1; 53, slide bar 2; 54, fixing ring; 55, top block; 56, spring 2; 57, push block; 58, limit rod; 59, wedge block; 591, wedge push rod; 592, telescopic spring; 593, wedge fixing block ; 594, ejection rod; 595, fixed rod; 596, spring six; 6, discharge mechanism; 61, discharge plate; 62, discharge arc block; 63, slide plate; 64, connecting block; 65, U-shaped push block; 66, gear lever one; 67, round rod; 68, spring three; 7, box body; 8, sliding assembly; 81, fixed block; 82, slide rail; 83, clamping block; 84, stop block; 85, slide rod three; 86, spring four; 87, gear lever two; 88, spring five. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-8 One embodiment of the present invention is: a tensile strength testing machine for testing composite polymer cables, comprising a testing platform 1, and also comprising: An operation box 2 is fixedly connected to the bottom of the testing platform 1; A bottom plate 3 is fixedly connected to the bottom of the operation box 2; Two boxes 7 are fixedly connected to both sides of the top of the testing platform 1; A pushing mechanism 4 is provided on the testing platform 1 and is used to pull the composite polymer cable; The discharging mechanism 6 is arranged above the testing platform 1 and is used to push the composite polymer cable out after the test; The sliding assembly 8 is arranged on the discharging mechanism 6 and is used to limit the position of the composite polymer cable; Among them, the driving agency 4 includes: The electric push rod 41 is fixedly connected to the inner wall of the operation box 2, and the output end of the electric push rod 41 movably passes through the operation box 2 and is connected to the push plate 42; Two push rods 43 are movably connected to the box body 7, and the outer sides of the push rods 43 are fixedly connected to the push plate 42; The movable block 44 is hinged on the side of the two push rods 43 away from the push plate 42; A plurality of slide bars 45 are fixedly connected to one side of the push rod 43, and the other side of the slide bars 45 is slidably connected to the inner wall of the box body 7; The movable block 44 is hollow inside, and a clamping mechanism 5 is provided inside the movable block 44 for clamping and fixing the composite polymer cable.

[0021] Working principle: When testing the composite polymer cable, firstly, the two ends of the composite polymer cable are clamped by the clamping mechanism 5 respectively, and then the two electric push rods 41 are started to push the push plates 42 on both sides to move, and at the same time push the two push rods 43 to move, and at the same time drive the movable block 44 to move, so that the composite polymer cable is pulled open by force. At this time, during the movement, the deformation length change of the composite polymer cable is recorded, and then the relationship between the tension and the tensile deformation amount of the composite polymer cable can be described by the following key formulas: 1. The relationship between stress and strain: σ = E ·ε, where σ represents stress, i.e., the tensile force per unit area, E represents elastic modulus, and ε represents strain, i.e., the deformation per unit length. This formula shows that within the elastic range, the stress and strain of the material are proportional, and the proportional coefficient is the elastic modulus; 2. Strain calculation formula: ε = ΔL / L0, where ε represents strain, ΔL represents the tensile deformation of the cable length, and L0 represents the original length of the cable; 3. Stress calculation formula: σ = F (composite polymer cable) / A, where σ represents stress, F represents the applied tension, and A represents the cross-sectional area of ​​the material.

[0022] Combining the above formula, we can derive the relationship between the tensile force F (composite polymer cable) on the composite polymer cable and the tensile deformation and ΔL: F (composite polymer cable) = σ·A = E·ε·A = E·(ΔL / L0)·A This formula shows that the tension F (composite polymer cable) on the composite polymer cable is related to the elastic modulus E, cross-sectional area A, tensile deformation ΔL and original length L0. Through this relationship, the tension on the cable under a given tensile deformation, or the tensile deformation of the cable under a given tension, can be calculated.

[0023] See also Figure 1-8Based on the above embodiment, in another embodiment of the present invention, the clamping mechanism 5 includes: Two clamping blocks 51 are arranged on the inner wall of the movable block 44; The second slide bar 53 is fixedly connected to the inner wall of the movable block 44, and the clamping block 51 is slidably connected to the outer wall of the second slide bar 53; A plurality of springs 52 are arranged on the outer wall of the slide rod 53 and located outside the two clamping blocks 51, and are used to push the two clamping blocks 51 closer to each other to clamp the composite polymer cable, and the two ends of the composite polymer cable are respectively fixedly connected with fixing rings 54 to prevent the fixing rings 54 and the composite polymer cable from moving.

[0024] The clamping mechanism 5 also includes: A top block 55 is fixedly connected to the top of the inner wall of the box body 7; A push block 57 is movably connected to the inner wall of the top block 55, and a spring 2 56 is provided on the inner wall thereof to push the push block 57 to move downward; Two limiting rods 58 are connected to the push block 57 through the push rod, and the limiting rods 58 are movably connected to the top block 55 to limit the push block 57 from being separated from the top block 55; The bottom of the push rod is in contact with the tops of the two push rods 43 and the movable block 44 .

[0025] The clamping mechanism 5 also includes: A wedge block 59 is fixedly connected to the clamp block 51; A wedge-shaped fixing block 593 is fixedly connected to the inner wall of the box body 7 and is located between the two push rods 43; Two wedge-shaped push rods 591 are slidably connected to the inclined surface of the wedge-shaped fixing block 593; The telescopic spring 592 is connected to the inner side of the two wedge-shaped push rods 591 and is used to push the two wedge-shaped push rods 591 away from each other, and the outer wall of the wedge-shaped push rod 591 is in contact with the inner inclined surface of the wedge block 59; The fixing rod 595 is fixedly connected to one side of the inner wall of the movable block 44, and the outer wall of the fixing rod 595 is slidably connected with a push rod 594, which is used to fit on one end of the composite polymer cable and the fixing ring 54 to push the fixing ring 54 out of the limit of the clamping block 51; Spring six 596 is sleeved on the outer wall of the fixed rod 595 and fixedly connected to the ejection rod 594 and the inner wall of the movable block 44 to push the ejection rod 594 to slide on the fixed rod 595 toward the side of the fixed ring 54.

[0026] Working principle: First, install a fixing ring 54 at both ends of the composite polymer cable to be tested, and then place the fixing ring 54 and the composite polymer cable inside the movable block 44, and at this time, push the two clamping blocks 51 to approach each other through the spring 1 52 to achieve the clamping and fixing of the composite polymer cable. At the same time, after the two clamping blocks 51 are close to each other, the elliptical hole formed between the two clamping blocks 51 blocks the fixing ring 54 to achieve the fixing and limiting of the composite polymer cable. At the same time, in the process of pulling the two push rods 43, the movable block 44 is synchronously driven to move. At this time, the push rod 43 first keeps in contact with the bottom of the push rod to limit and maintain horizontal movement to stretch the composite polymer cable. Then, after the stretching is completed, the two wedge-shaped push rods 591 and the telescopic spring 592 are synchronously driven to move synchronously by continuing to move to both sides. Then, when the two wedge-shaped push rods 591 move to the wedge-shaped fixed block 593 and achieve resistance to the two wedge-shaped push rods 591, the two wedge blocks 591 are pushed to move upward. The two clamping blocks 51 move away from each other, thereby driving the two clamping blocks 51 to move away from each other. At this time, after the two clamping blocks 51 move away from each other, the restriction on the fixed ring 54 is released, so that the fixed ring 54 is no longer blocked. At the same time, after the spring two 56 moves, it pushes downward, and at the same time pushes the push block 57 and the push rod downward, thereby pushing the movable block 44 to deflect downward, thereby realizing auxiliary discharging. At the same time, when the restriction on the fixed ring 54 is released again, the spring six 596 can be used to push the push rod 594 to move, so as to realize the push out of the fixed ring 54, so as to realize the push out of the composite polymer cable and the fixed ring 54, and realize the function of discharging after detection.

[0027] See also Figure 1-8 Based on the above embodiment, in another embodiment of the present invention, the discharging mechanism 6 includes: A discharge plate 61 is slidably connected above the detection platform 1; Two discharge arc blocks 62 are symmetrically and fixedly connected to the back of the discharge plate 61, and cooperate with the discharge plate 61 to push the tested composite polymer cable backwards to discharge; The slide plate 63 is fixedly connected to the discharge plate 61 and the discharge arc block 62 below, and slides above the detection platform 1 through two connecting blocks 64 connected to the bottom thereof.

[0028] The discharging mechanism 6 also includes: A U-shaped push block 65 is slidably connected to the inner wall of the operation box 2; The round rod 67 is fixedly connected to the inner wall of the operation box 2 and movably connected to the U-shaped push block 65; Spring three 68 is sleeved on the outer wall of the round rod 67 and pushes the U-shaped push block 65 to move backward; The two shift rods 66 are movably connected to the operation box 2 , respectively. The shift rod 66 is fixedly connected to the inner side of the push plate 42 , and the other side is movably plugged into the U-shaped push block 65 .

[0029] Working principle: During the detection, after the push plate 42 moves and continues to move after the detection is completed, the gear lever 66 will be out of contact with the U-shaped push block 65, thereby being pushed by the spring 3 68 and pushing the U-shaped push block 65 to move, and synchronously driving the connecting block 64 and the slide plate 63 to move, and at the same time pushing the discharge plate 61 and the discharge arc block 62 to move, so as to push the composite polymer cable that is released after the detection is completed, so as to achieve auxiliary discharge and improve the detection efficiency.

[0030] See also Figure 1-8 Based on the above embodiment, in another embodiment of the present invention, the sliding assembly 8 includes: A plurality of fixing blocks 81, two in a group and symmetrically fixedly connected to the inner side of the arc of the discharge plate 61 and the discharge arc block 62; Two slide rails 82 are fixedly connected to each set of fixed blocks 81; The two clamping blocks 83 are connected to the outer wall of the composite polymer cable by bolts, and the upper and lower sides of the two clamping blocks 83 slide on the slide rails 82 respectively.

[0031] The sliding assembly 8 also includes: Sliding rod three 85, fixedly connected to the inner side of each set of fixed blocks 81; The stopper 84 is slidably connected to the outer wall of the slide bar 3 85, and the outer wall of the slide bar 3 85 is sleeved with a spring 4 86 for pushing the stopper 84 away from the movable block 44; Two rectangular holes are respectively formed on the slide rail 82, and the stopper 84 is movably connected with a second shift rod 87, and the second shift rod 87 moves in the rectangular hole and fits with the inner side of the clamping block 83; Spring five 88 is arranged in the stopper 84 and pushes the stopper rod two 87 to go deep into the rectangular hole.

[0032] Working principle: When the test is finished, the clamping block 51 will first release the clamping of the composite polymer cable and release the limit of the fixing ring 54. At the same time, the fixing ring 54 will deflect and push the fixing ring 54 to move through the spring 6 596, so as to push the fixing ring 54 out of the clamping block 51 for discharge; At the same time, the discharge plate 61 pushes the entire composite polymer cable to move backward to assist in discharging; At the same time, when conducting a tensile test, the composite polymer cable is pulled and the clamping block 83 is moved, and then the gear lever 2 87 is pushed to move through the protrusion on one side of the clamping block 83, and the gear lever 84 moves on the slide bar 3 85, and squeezes the spring 4 86 to produce deformation. At the same time, after the test is completed, after the clamping block 51 is disengaged, the gear lever 2 87 is pushed to move through the spring 4 86 to achieve resetting and assist in replacing the composite polymer cable.

[0033] According to Hooke's law, within the elastic range, the tensile deformation of the spring is proportional to the applied force. The specific formula is as follows: F (spring) = K ΔL Base: F (spring) is the tension applied to the spring K is the spring rate (also called the spring constant) of the spring ΔL is the elongation of the spring (i.e. the length by which the spring is stretched).

[0034] This formula shows that the stretch deformation ΔL of the spring is proportional to the applied force F (spring), with a proportionality coefficient of 1 / K. Therefore, given the spring stiffness coefficient K and the stretch deformation ΔL of the spring 486, the tension F on the spring can be calculated: F (spring) = ΔL·K; At this time, the actual tensile force of the composite polymer cable is obtained after passing through F (composite polymer cable) - F (spring).

[0035] The present invention provides a tensile strength testing machine for composite polymer cable testing. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A tensile strength testing machine for testing composite polymer cables, comprising a testing table (1), characterized in that: Also includes: An operating box (2) fixedly connected to the bottom of the testing platform (1); A bottom plate (3) fixedly connected to the bottom of the operation box (2); Two boxes (7) are respectively fixedly connected to two sides of the top of the detection platform (1); A pushing mechanism (4), arranged on the detection platform (1), and used for pulling the composite polymer cable; A discharging mechanism (6) is arranged above the testing platform (1) and is used to push the composite polymer cable out after the test; A sliding assembly (8) is arranged on the discharging mechanism (6) and is used to limit the position of the composite polymer cable; Wherein, the pushing mechanism (4) comprises: An electric push rod (41) is fixedly connected to the inner wall of the operating box (2), and an output end of the electric push rod (41) movably passes through the operating box (2) and is connected to a push plate (42); The two push rods (43) are movably connected to the box body (7), and the outer sides of the push rods (43) are fixedly connected to the push plate (42); A movable block (44) is hingedly connected to a side of the two push rods (43) away from the push plate (42); A plurality of sliding rods (45) are fixedly connected to one side of the push rod (43), and the other side of the sliding rod (45) is slidably connected to the inner wall of the box body (7); The movable block (44) is hollow inside, and a clamping mechanism (5) is provided inside the movable block (44) for clamping and fixing the composite polymer cable.

2. The tensile strength testing machine for composite polymer cable testing according to claim 1, characterized in that: The clamping mechanism (5) comprises: Two clamping blocks (51) are arranged on the inner wall of the movable block (44); The second slide bar (53) is fixedly connected to the inner wall of the movable block (44), and the clamping block (51) is slidably connected to the outer wall of the second slide bar (53); A plurality of springs (52) are arranged on the outer wall of the slide rod (53) and located outside the two clamping blocks (51) for pushing the two clamping blocks (51) closer to each other to clamp the composite polymer cable, and the two ends of the composite polymer cable are respectively fixedly connected with fixing rings (54) to prevent the fixing rings (54) and the composite polymer cable from moving.

3. The tensile strength testing machine for composite polymer cable testing according to claim 2, characterized in that: The clamping mechanism (5) further comprises: A top block (55) fixedly connected to the top of the inner wall of the box body (7); A push block (57) is movably connected to the inner wall of the top block (55), and a second spring (56) is provided on the inner wall thereof to push the push block (57) to move downward; Two limiting rods (58) are connected to the push block (57) via a push rod, and the limiting rods (58) are movably connected to the top block (55) to limit the push block (57) from being separated from the top block (55); The bottom of the push rod is in contact with the tops of the two push rods (43) and the movable block (44).

4. The tensile strength testing machine for composite polymer cable testing according to claim 3 is characterized by: The clamping mechanism (5) further comprises: A wedge block (59) fixedly connected to the clamping block (51); A wedge-shaped fixing block (593) is fixedly connected to the inner wall of the box body (7) and is located between the two push rods (43); Two wedge-shaped push rods (591) are slidably connected to the inclined surface of the wedge-shaped fixing block (593); A telescopic spring (592) is connected to the inner sides of the two wedge-shaped push rods (591) and is used to push the two wedge-shaped push rods (591) away from each other, and the outer wall of the wedge-shaped push rod (591) is in contact with the inner inclined surface of the wedge block (59); A fixed rod (595) is fixedly connected to one side of the inner wall of the movable block (44), and a push rod (594) is slidably connected to the outer wall of the fixed rod (595) and is used to fit on one end of the composite polymer cable and the fixed ring (54) to push the fixed ring (54) away from the limit of the clamping block (51); A spring six (596) is sleeved on the outer wall of the fixed rod (595) and fixedly connected to the ejection rod (594) and the inner wall of the movable block (44) to push the ejection rod (594) to slide on the fixed rod (595) toward the side of the fixed ring (54).

5. The tensile strength testing machine for composite polymer cable testing according to claim 4, characterized in that: The discharging mechanism (6) comprises: A discharge plate (61) slidably connected above the detection platform (1); Two discharge arc blocks (62) are symmetrically and fixedly connected to the back of the discharge plate (61), and cooperate with the discharge plate (61) to push the tested composite polymer cable backwards to discharge; The slide plate (63) is fixedly connected to the discharge plate (61) and the discharge arc block (62) below, and slides above the detection platform (1) via two connection blocks (64) connected to the bottom thereof.

6. The tensile strength testing machine for composite polymer cable testing according to claim 5, characterized in that: The discharging mechanism (6) further comprises: A U-shaped push block (65) slidably connected to the inner wall of the operating box (2); A round rod (67) is fixedly connected to the inner wall of the operating box (2) and is movably connected to the U-shaped push block (65); A spring three (68) is sleeved on the outer wall of the round rod (67) and pushes the U-shaped push block (65) to move backward; Two shift rods (66) are movably connected to the operating box (2), respectively. One of the shift rods (66) is fixedly connected to the inner side of the push plate (42), and the other side is movably plugged into the U-shaped push block (65).

7. The tensile strength testing machine for composite polymer cable testing according to claim 6, characterized in that: The sliding assembly (8) comprises: A plurality of fixing blocks (81), two in a group and symmetrically fixedly connected to the inner side of the arc of the discharge plate (61) and the discharge arc block (62); Two slide rails (82) are respectively fixedly connected to each set of fixed blocks (81); The two clamping blocks (83) are connected to the outer wall of the composite polymer cable by means of bolts, and the upper and lower sides of the two clamping blocks (83) slide on the slide rails (82) respectively.

8. The tensile strength testing machine for composite polymer cable testing according to claim 7, characterized in that: The sliding assembly (8) further comprises: Sliding rod three (85), fixedly connected to the inner side of each set of fixed blocks (81); A stopper (84) is slidably connected to the outer wall of the slide rod (85), and a spring (86) is sleeved on the outer wall of the slide rod (85) for pushing the stopper (84) away from the movable block (44); Two rectangular holes are respectively formed on the slide rail (82), and the stop block (84) is movably connected to a second stop rod (87), and the second stop rod (87) moves in the rectangular hole and fits with the inner side of the clamping block (83); Spring five (88) is arranged in the stopper (84) and pushes the second stopper rod (87) to go deep into the rectangular hole.

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