CN221038418U

CN221038418U - Steel wire rope performance testing device

Info

Publication number: CN221038418U
Application number: CN202322698030.1U
Authority: CN
Inventors: 吴安; 候浩强
Original assignee: Fixator Asia Co ltd
Current assignee: Fixator Asia Co ltd
Priority date: 2023-10-09
Filing date: 2023-10-09
Publication date: 2024-05-28
Anticipated expiration: 2033-10-09

Abstract

The steel wire rope performance testing device comprises a power supply module, a testing table, a fixing table, an electric hydraulic oil pump oil cylinder assembly, a pressure sensor and a connecting sleeve; the display mechanism and the prompt mechanism are also provided; the lower end of the fixed table is arranged on the upper part of the test table, the pressure sensor is arranged at one side end of the fixed table, and the oil cylinder is arranged at one side of the test table; each set of connecting sleeve comprises a fixed pipe and a fixed clamp, a screw rod is arranged at the upper end of the fixed pipe, the fixed clamp is movably sleeved in the fixed pipe, the outer side of the fixed pipe of one set of connecting sleeve is positioned at the outer end of a stress surface of the pressure sensor and is provided with a limiting plate, the fixed pipe of the other set of connecting sleeve is arranged together with a piston rod of an oil cylinder, and an electric hydraulic oil pump is arranged in the test bench; the power supply module, the display mechanism and the prompt mechanism are arranged in the electric cabinet and are electrically connected. The utility model discloses whether can test wire rope fracture simultaneously and by elongation, need not the measurement personnel artificial measurement wire rope to become longer, can indicate the tester at the first time that wire rope length becomes longer.

Description

Steel wire rope performance testing device

Technical Field

The utility model relates to the technical field of test equipment, in particular to a steel wire rope performance test device.

Background

In order to ensure the use safety of hoisting equipment (such as an electric hoist) in a hoisting equipment manufacturer, a maintenance manufacturer and the like, the requirement of testing the performance of the used steel wire rope is met. When the existing steel wire rope testing equipment is used for testing, one end of a steel wire rope is usually fixed (a tension sensor is arranged at one end of the testing equipment, one end of the steel wire rope is fixed with the stress end of the tension sensor), then the other end of the steel wire rope is fixed on a shaft based on traction of a motor speed reducing mechanism or an oil cylinder, the motor speed reducing mechanism or the oil cylinder and the like are used for tensioning the steel wire rope, and when the steel wire rope is broken (including partial steel wire raw breakage), the reading of the tension sensor is read in real time, so that stress limit data of the tested steel wire rope are obtained.

In fact, the situation that the steel wire rope is broken under the general condition is not common, so that the current testing equipment often tests whether the steel wire rope is stretched under the corresponding acting force or not, and further obtains a conclusion that whether the steel wire rope can meet the safety requirement in practical application or not through the obtained related data (the steel wire rope can not meet the stress requirement when the steel wire rope is pulled under a certain tensile force and the pulling length is relatively long). At present, whether the steel wire rope is stretched under a certain acting force or not generally needs to be judged after a period of corresponding acting force. Specifically, after the motor speed reducing mechanism or the oil cylinder and the like tighten the steel wire rope for a period of time, a tester takes down the tested steel wire rope measuring tool to measure and compare the length before the test, so as to obtain whether the steel wire rope is stretched or not. Because the related data can be obtained after the manual measurement by the tester, and whether the steel wire rope is lengthened or not is measured, the inconvenience is brought to the tester correspondingly, and the improvement of the testing working efficiency is also not facilitated.

Disclosure of utility model

The utility model provides the steel wire rope performance testing device which can simultaneously test whether the steel wire rope is broken and stretched, does not need to be manually measured by a tester, can timely sound to prompt the tester at the first time when the length of the tested steel wire rope is longer than a threshold value (does not need to wait for a long time to manually measure), thereby bringing convenience to the tester, improving the working efficiency, and overcoming the defects that the existing steel wire rope performance testing device brings inconvenience to the tester and is relatively unfavorable for improving the testing efficiency due to the limited structure.

The technical scheme adopted for solving the technical problems is as follows:

The steel wire rope performance testing device comprises a power supply module, a testing table, a fixing table, an electric hydraulic oil pump oil cylinder assembly, a pressure sensor and a connecting sleeve; the display device is characterized by also comprising a display mechanism and a prompt mechanism; openings are formed in two side ends of the fixed table respectively, the lower end of the fixed table is arranged on the upper part of the test table, the pressure sensor is arranged at one side end of the fixed table, and the oil cylinder is arranged at one side of the test table; the connecting sleeves are provided with at least two sets, each set of connecting sleeve comprises a fixed pipe and a fixed clamp, the upper end of the fixed pipe is provided with a screw rod, the fixed clamp is movably sleeved in the fixed pipe, the outer side ends of the fixed pipes of the two sets of connecting sleeves are respectively led out outwards through holes at the two side ends of the fixed table, the outer side of the fixed pipe of one set of connecting sleeve is positioned at the outer end of the stress surface of the pressure sensor and is provided with a limiting plate, the fixed pipe of the other set of connecting sleeve is arranged together with the piston rod of the oil cylinder, and the electric hydraulic oil pump is arranged in the test table; the power supply module, the display mechanism and the prompt mechanism are arranged in the electric cabinet, and the signal output end of the pressure sensor is electrically connected with the signal input ends of the display mechanism and the prompt mechanism.

Preferably, the radian of the fixing clamp is consistent with the inner arc of the fixing pipe, the outer diameter of the upper and lower parts of the two fixing clamps is smaller than the inner diameter of the fixing pipe, the inner diameter of the upper and lower parts of the two fixing clamps is smaller than the outer diameter of the tested steel wire rope, and the inner side end and the outer side end of the fixing clamp are respectively transversely provided with a plurality of anti-slip teeth.

Preferably, the outer diameter of the limiting plate is larger than the inner diameter of the central hole of the pressure sensor.

Preferably, the display mechanism comprises a voltage display meter, a resistor and an adjustable resistor which are electrically connected, wherein one end of the adjustable resistor is connected with one end of the resistor, the positive power input end of the voltmeter, and the negative power input end of the voltmeter is connected with the other end of the resistor.

Preferably, the prompting mechanism comprises an adjustable resistor, a resistor, an NPN triode and a buzzer which are electrically connected, wherein the positive power input end of the buzzer is connected with one end of a first resistor, the other end of the first resistor is connected with a first NPN triode collector and a second NPN triode base electrode, the second NPN triode collector is connected with the negative power input end of the buzzer, one end of the adjustable resistor is connected with one end of the second resistor, one end of the third resistor is connected with one end of the third resistor, the other end of the second resistor is connected with the first NPN triode base electrode, and the other end of the third resistor is connected with two NPN triode emitters.

Compared with the prior art, the utility model has the beneficial effects that: the novel tester can test whether the steel wire rope breaks or not and stretch variable length data at the same time, and a tester obtains specific data by observing the voltage value of the voltmeter at the first time of the breaking of the steel wire rope; the measuring staff is not needed to manually measure whether the steel wire rope is lengthened or not in the follow-up, the testing staff can be prompted through sounding of the buzzer at the first time when the length of the steel wire rope is lengthened, convenience is brought to the measuring staff, and the testing efficiency is correspondingly improved.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the overall structure and a partial enlarged structure of the present utility model.

Fig. 2 is a circuit diagram of the present utility model.

Detailed Description

The device for testing the performance of the steel wire rope is shown in fig. 1 and 2, and comprises a power supply module K1, a power switch, a test table 1, a fixed table 2, an electric hydraulic oil pump (not shown in the figure), an oil cylinder 3, a pressure sensor K2 and a connecting sleeve 4, wherein an electromagnetic valve DC and a DC1 outside the upper ends of the left end and the right end of a cylinder barrel of the oil cylinder 3 are respectively connected with two oil inlet and outlet pipes and two oil return pipes of the oil pump through the hydraulic oil pipes; the display mechanism 5 and the prompt mechanism 6 are also provided; the middle parts of the left side end and the right side end of the n-shaped fixed table 2 are respectively provided with an opening 21, two sides of the lower end of the fixed table 2 are respectively welded at the left side and the upper end of the middle part of the test table 1, a pressure sensor K2 is arranged outside the opening 21 of the left side end of the fixed table through bolts, the central hole of the pressure sensor K2 and the opening 21 are transversely positioned in a straight line, the outer part of the lower end of a cylinder body of the oil cylinder 3 is transversely welded at the middle part of the right upper end of the test table 1, and a piston rod of the piston rod is positioned at the left side end; the two sets of connecting sleeves 4 are arranged, each set of connecting sleeve comprises a fixed pipe 41 and an arc-shaped fixed clamp 42, the upper end of the fixed pipe 41 is transversely provided with a plurality of screw holes, the outer upper end of each screw hole is provided with a fixed screw rod 43 through threads, the two fixed clamps 42 are respectively movably sleeved in the upper end and the lower end of the fixed pipe 41, the outer ends of the fixed pipes of the two sets of connecting sleeves 4 are respectively led out outwards through openings 21 (the inner diameter is larger than the outer diameter of the fixed pipe) at the left side and the right side of a fixed pipe 41 (the outer diameter is smaller than the inner diameter of a central hole of a pressure sensor) at the left side, the outer end of the fixed pipe 41 at the left side is welded with a limiting plate 7, the outer side of the fixed pipe 41 at the right side is welded with a flange disc, the left side end of a piston rod of the oil cylinder 3 is mounted together through bolts, and the electric hydraulic oil pump is mounted in the lower part of the test bench 1 through bolts; the power supply module K1, the power switch, the display mechanism 5 and the prompt mechanism 6 are arranged on a circuit board in the electric cabinet 8, and the electric cabinet 8 is arranged at the left front side end in the test bench 1.

As shown in fig. 1 and 2, the radian of the fixing clip 42 is consistent with the inner arc of the fixing tube 41, the outer diameter of the upper and lower parts of the two fixing clips 42 is smaller than the inner diameter of the fixing tube 41, the inner diameter of the upper and lower parts of the two fixing clips 42 is smaller than the outer diameter of the tested steel wire rope 9, and the inner side end and the outer side end of the fixing clip 42 are respectively transversely provided with a plurality of anti-slip teeth (preventing the steel wire rope from sliding). The external diameter of the limiting plate 7 is larger than the internal diameter of the central hole of the pressure sensor K2, and the right side end of the limiting plate 7 is in surface contact with the left side end of the pressure sensor K2. The display mechanism comprises a voltage display meter V, an adjustable resistor R1 and a resistor R2 which are connected through wiring of a circuit board, wherein one end of the adjustable resistor R1 is connected with one end of the first resistor R2, the positive power input end of the voltage meter V is connected with the negative power input end of the voltage meter V (the display surface is positioned outside the front end of the electric cabinet), and the other end of the resistor R2 is connected. The prompting mechanism comprises an adjustable resistor RP, resistors R3, R4 and R5, NPN triodes VT and VT1 and a buzzer B which are connected through circuit board wiring, wherein the positive power input end of the buzzer B is connected with one end of a first resistor R5, the other end of the first resistor R5 is connected with a collector of the first NPN triode VT and a base of a second NPN triode VT1, the collector of the second NPN triode VT1 is connected with the negative power input end of the buzzer B, one end of the adjustable resistor RP is connected with one end of the second resistor R4, one end of a third resistor R3 is connected, the other end of the second resistor R4 is connected with a base of the first NPN triode VT, and the other end of the third resistor R3 is connected with two NPN triodes VT and VT 1. The power input ends 1 and 2 pins of the power supply module K1 and the two poles of an alternating current 220V power supply are respectively connected through wires, the power output ends 3 and 4 pins of the power supply module K1 and the power input ends of three power switches S, S and S2 (the handles are all positioned outside three openings at the front end of the electric cabinet) are respectively connected through wires, the power output end of a first power switch S, S2 and the power input ends of the 4 pins of the power supply module K1 and two solenoid valves DC and DC1 (one-position two-way solenoid valve) of the oil cylinder are respectively connected through wires, the power output end of a third power switch S2 and the 4 pins of the power supply module K1 are respectively connected with the other end of a power input end resistor R2 of the display mechanism and the positive power input end of a buzzer B of the prompting mechanism and the emitting electrode of the NPN triode VT, and the power input ends 1 and 2 pins of the pressure sensor K2 are respectively connected through wires, and the signal output end 3 pin of the pressure sensor K2 and the signal input end adjustable resistor R1 of the other end of the display mechanism and the signal input end adjustable resistor RP of the other end of the prompting mechanism are respectively connected through wires.

As shown in fig. 1 and 2, after the power input end of the power supply module K1 is powered, the 3 and 4 pins of the power supply module K1 output stable dc 12V power to enter the power switch. Before testing, a tester respectively sleeves the two side ends of the tested steel wire rope 9 between two fixing clamps 42, then the left end of the steel wire rope and the fixing clamp are sleeved in the left end fixing pipe 41, and the screw rod 43 is screwed, so that the left end of the tested steel wire rope is fixed in the left end fixing pipe 41; then, the tester clamps the right end of the wire rope and the fixing jacket in the right-end fixing tube 41, and then screws the lead screw 43, thereby fixing the right-side end of the wire rope to be tested in the right-end fixing tube 41. Then, the power switch S is turned on by a worker, so that the electromagnetic valve DC at the left end of the cylinder barrel of the oil cylinder 3 is electrified, the high-pressure hydraulic oil output by one oil outlet and return pipe of the electric hydraulic oil pump enters the left end in the cylinder barrel through the electromagnetic valve DC oil inlet pipe, the hydraulic oil at the right end in the oil cylinder flows back into the electric hydraulic oil pump through the oil outlet and return pipe of the electric hydraulic oil pump through the electromagnetic valve DC1 at the right end of the cylinder barrel of the oil cylinder 3, the piston rod of the oil cylinder 3 gradually drives the right end fixing pipe to move towards the right end, the steel wire rope 9 is gradually tensioned, the limiting plate 7 gradually increases due to the gradual tensioning of the pressure acting on the stress surface of the pressure sensor K2, and the safety distance of the worker is observed by the moment to be the number displayed by the voltmeter V, so that the whole broken or partial broken tension data of the steel wire rope are obtained through the observed voltmeter V data (for example, the number of the voltage displayed by the voltmeter is 4V, the representative tension data is 4000KG, and the specific data can be obtained by selecting the resistance value of the adjustable resistance R1, and the specific data are introduced later). In the test, when the piston rod of the oil cylinder pulls the steel wire rope 9 to move to the right side end, the voltage signal output by the 3 pin of the pressure sensor K2 is relatively high, the voltage signal is divided by the adjustable resistor R1 and the resistor R2 to enter the voltmeter V, the voltage number displayed by the voltmeter V is relatively large, when the piston rod of the oil cylinder pulls the steel wire rope 9 to move to the right side end, the voltage signal output by the 3 pin of the pressure sensor K2 is relatively low, the voltage signal is divided by the adjustable resistor R1 and the resistor R2 to enter the voltmeter V, the voltage number displayed by the voltmeter V is relatively small, and thus, the tension of the steel wire rope test can be displayed in real time through the digital change of the voltmeter V.

In the test shown in fig. 1 and 2, the voltage signal output by the 3 pin of the pressure sensor K2 is divided by the adjustable resistor R1 and the resistor R2, then divided by the adjustable resistor RP and the resistor R3, the resistor R4 reduces the voltage and limits the current to enter the base electrode of the NPN triode VT, when the tested pressure reaches the voltage value set by the tester through the adjustable resistor RP (i.e. reaches the pulling force of the oil cylinder acting on the steel wire rope 9), the voltage entering the base electrode of the NPN triode VT is higher than 0.7v, the conduction collector of the NPN triode VT outputs a low level to enter the base electrode of the NPN triode VT1, the base electrode of the NPN triode VT1 is cut off without proper forward bias, then the buzzer B will not sound electrically, ready for measurement of whether the wire rope 9 gets longer or not under the corresponding tension in a period of time at the rear side. In practical situations, when the length of the steel wire rope 9 is not lengthened in a subsequent period of time, the tensile force applied to the stress surface of the pressure sensor K2 is relatively large, the voltage output by the 3 pin of the pressure sensor K2 is divided by the adjustable resistor R1 and the resistor R2, and then divided by the adjustable resistor RP and the resistor R3, the voltage of the base electrode of the NPN triode VT, which is fed into the NPN triode through the voltage reduction and current limiting of the resistor R4, is continuously higher than 0.7V, the low level output by the continuous conduction collector electrode of the NPN triode VT continuously enters the base electrode of the NPN triode VT1, the base electrode of the NPN triode VT1 is continuously cut off, the buzzer B continuously cannot produce electric sounds, and the tested steel wire rope 9 is not lengthened in length is represented, And the quality is qualified. When a subsequent period (for example, 30 minutes is taken as a test period), due to the long-term tension action of the oil cylinder, the quality of the steel wire rope 9 is poor, and the length of the steel wire rope 9 is long, the tension applied to the stress surface of the pressure sensor D2 is relatively small, the voltage signal output by the 3 pin of the pressure sensor K2 is divided by the adjustable resistor R1 and the resistor R2, and is divided by the adjustable resistor RP and the resistor R3, the voltage of the base electrode of the NPN triode VT is reduced by the resistor R4, the current limiting current enters the voltage of the base electrode of the NPN triode VT and is lower than 0.7V, the cut-off collector of the NPN triode VT does not output low level any more, the base electrode of the NPN triode VT1 obtains proper forward bias from the 4 pin of the power supply module K1 through the resistor R5, the cut-off collector outputs low level and enters the negative electrode power supply input end of the buzzer B, the buzzer B is electrified to sound, and the length of the tested steel wire rope 9 is prolonged. The staff just can directly perceivedly know the wire rope 9 quality that is tested in the very first time after hearing the suggestion sound. After the test is finished, a worker turns on the power switch S1 (S is turned off), so that the electromagnetic valve DC1 at the right end of the cylinder barrel of the oil cylinder 3 is electrified, high-pressure hydraulic oil output by the other oil outlet and return pipe of the electric hydraulic oil pump enters the right end in the cylinder barrel through the oil inlet pipe of the electromagnetic valve DC1, hydraulic oil at the left end in the oil cylinder flows back into the electric hydraulic oil pump through one oil outlet and return pipe of the electric hydraulic oil pump through the electromagnetic valve DC oil outlet pipe at the left end of the cylinder barrel of the oil cylinder 3, a piston rod of the oil cylinder 3 gradually drives the right end fixing pipe to move towards the left end, a tested steel wire rope is not tensioned any more, and the worker can take out the tested steel wire rope to finish the test after unscrewing screw rods of the two fixing pipes 41. Through the above, the novel device can simultaneously test the steel wire rope fracture and whether the steel wire rope is stretched to be longer, and a tester obtains specific data by observing the voltage value of the voltmeter at the first time of the steel wire rope fracture; the follow-up need not the test personnel artificial measurement wire rope whether become long data, can pass through buzzer sounding suggestion test personnel in the first time that wire rope length becomes long, thereby brought the facility for test personnel, and corresponding improvement test efficiency. In fig. 2, the resistances R2, R3, R4, R5 are 4.2K, 10K, 47K, 25K, respectively; the resistance of the adjustable resistor R1 is 47K (the embodiment is adjusted to 11.2K); the resistance of the adjustable resistor RP is 100K (the embodiment is adjusted to 45.6K); the buzzer B is an active continuous sound buzzer alarm finished product with the model XQ 12V; the types of the NPN triodes VT and VT1 are S9014 and S9013 respectively; the power supply module K1 is a finished product of a power supply module for converting alternating current 220V into direct current 12V; the voltmeter V is a liquid crystal four-bit voltmeter with a measuring range of direct current 12V; the pressure sensor K2 is a finished product of a tension-pressure annular force sensor with the model DYHX-003 and the maximum detection tension of 5000KG, and the middle part of the pressure sensor is provided with an annular through hole which is provided with two power input ends and a signal output end, and voltage signals which change between 0 and 10V can be output along with different detected tension-pressure signal output ends. In the novel method, when a primary shaping production technician determines the resistance value of the adjustable resistor R1, an electronic hoist with weight display is connected in series between a right-end fixed pipe and a piston rod of an oil cylinder through other steel wire ropes, then the tested steel wire rope is straightened, then the reading (such as 1000 KG) of the electronic hoist is observed, then the technician adjusts the resistance value of the adjustable resistor R1 left or right (the left adjustment resistance value is smaller and the partial pressure between the resistor R2 is smaller, and vice versa) and just after the reading is the same as the reading of the hoist (such as the number 0100V displayed by a voltmeter represents 1000 KG), then the technician takes down the adjustable resistor R1 to perform resistance value measurement, the current resistance value is the resistance value of the adjustable resistor R1 of the subsequent mass production (the resistance value of the adjustable resistor R1 can be directly adjusted in place between the subsequent mass production or replaced by a fixed resistor with the same resistance value). In the utility model, the handle of adjustable resistance RP is located outside the fourth trompil of electric cabinet front end, after the taut wire rope of hydro-cylinder, the resistance of adjustable resistance RP is adjusted to the staff left or right (left side adjusts resistance and diminishes and the resistance R2 between the partial pressure little, and vice versa the partial pressure is big), just adjusts the resistance of adjustable resistance RP when buzzer B does not sound and just adjusts to needs (after the long-term relatively big pulling force length of follow-up wire rope becomes longer, the voltage signal of pressure sensor output is relatively little, buzzer B will sound prompt immediately).

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be connected mechanically and electrically, can be directly connected, can be indirectly connected through an intermediate medium, and can be communicated with each other inside the two components. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The steel wire rope performance testing device comprises a power supply module, a testing table, a fixing table, an electric hydraulic oil pump oil cylinder assembly, a pressure sensor and a connecting sleeve; the display device is characterized by also comprising a display mechanism and a prompt mechanism; openings are formed in two side ends of the fixed table respectively, the lower end of the fixed table is arranged on the upper part of the test table, the pressure sensor is arranged at one side end of the fixed table, and the oil cylinder is arranged at one side of the test table; the connecting sleeves are provided with at least two sets, each set of connecting sleeve comprises a fixed pipe and a fixed clamp, the upper end of the fixed pipe is provided with a screw rod, the fixed clamp is movably sleeved in the fixed pipe, the outer side ends of the fixed pipes of the two sets of connecting sleeves are respectively led out outwards through holes at the two side ends of the fixed table, the outer side of the fixed pipe of one set of connecting sleeve is positioned at the outer end of the stress surface of the pressure sensor and is provided with a limiting plate, the fixed pipe of the other set of connecting sleeve is arranged together with the piston rod of the oil cylinder, and the electric hydraulic oil pump is arranged in the test table; the power supply module, the display mechanism and the prompt mechanism are arranged in the electric cabinet, and the signal output end of the pressure sensor is electrically connected with the signal input ends of the display mechanism and the prompt mechanism.

2. The steel wire rope performance testing device according to claim 1, wherein the radian of the fixing clamps is consistent with the inner arc of the fixing pipe, the outer diameter of the upper and lower components of the two fixing clamps is smaller than the inner diameter of the fixing pipe, the inner diameter of the upper and lower components of the two fixing clamps is smaller than the outer diameter of the tested steel wire rope, and the inner side end and the outer side end of the fixing clamps are respectively provided with a plurality of anti-slip teeth in the transverse direction.

3. The wire rope performance test device of claim 1, wherein the outer diameter of the limiting plate is greater than the inner diameter of the central bore of the pressure sensor.

4. The device for testing the performance of the steel wire rope according to claim 1, wherein the display mechanism comprises a voltage display meter, a resistor and an adjustable resistor which are electrically connected, one end of the adjustable resistor is connected with one end of the resistor, the positive power input end of the voltage meter is connected, and the negative power input end of the voltage meter is connected with the other end of the resistor.

5. The device for testing the performance of the steel wire rope according to claim 1, wherein the prompting mechanism comprises an adjustable resistor, a resistor, an NPN triode and a buzzer which are electrically connected, the positive power input end of the buzzer is connected with one end of the first resistor, the other end of the first resistor is connected with a first NPN triode collector and a second NPN triode base electrode, the second NPN triode collector is connected with the negative power input end of the buzzer, one end of the adjustable resistor is connected with one end of the second resistor and one end of the third resistor, the other end of the second resistor is connected with the first NPN triode base electrode, and the other end of the third resistor is connected with two NPN triode emitters.