A mechanical stress testing device for mechanical connection of cable joints

Abstract

The present invention provides a mechanical stress test device for the mechanical connection of a cable joint, which is used for mechanical stress testing by periodically reciprocatingly applying force to one side cable of the cable joint, and has high detection efficiency and good detection accuracy. The first electromagnet and the second electromagnet have the same structure, both including an electromagnet part, a push-pull rod, and a spring. The output end of the push-pull rod is provided with an external connection structure, and the external connection structure is used to fix the cable on one side corresponding to the cable joint to be tested. When the electromagnet part is not powered on, the output end of the push-pull rod is ejected under the action of the spring. When the electromagnet part is powered on, the push-pull rod is adsorbed inward, the push-pull rod overcomes the spring force, and the output end of the push-pull rod retracts a set distance; the signal output end of the waveform generator is connected to the signal input end of the relay, and the relay is provided with a single-pole double-throw switch, one of the output ends of the relay is connected to the first electromagnet, and the other output end of the relay is connected to the second electromagnet.

Description

Technical Field

[0001] The invention relates to the technical field of cable joint testing, in particular to a mechanical stress testing device for a mechanical connection of a cable joint. Background Art

[0002] The existing mechanical stress test equipment is for large equipment, with large vibration amplitude and force, and high price. After two sections of cable are connected through a cable joint, the mechanical stress of the joint mechanical connection needs to be tested. The existing large-scale mechanical stress test equipment cannot provide accurate testing, so manual mechanical stress testing is required, resulting in reduced work efficiency and poor test accuracy. Therefore, there is an urgent need for a device that can be applied to the mechanical stress test of cable joints. Summary of the invention

[0003] In view of the above problems, the present invention provides a mechanical stress testing device for the mechanical connection of a cable connector, which is used for mechanical stress testing by periodically applying reciprocating force to the cable on one side of the cable connector. It has a simple structure, high detection efficiency and good detection accuracy.

[0004] A mechanical stress testing device for a mechanical connection of a cable connector, characterized in that it comprises:

[0005] A first electromagnet;

[0006] A second electromagnet;

[0007] Waveform generator;

[0008] Relay;

[0009] The first electromagnet and the second electromagnet are of the same structure, both including an electromagnet part, a push-pull rod, and a spring. The output end of the push-pull rod is provided with an external connection structure, and the external connection structure is used to fix the cable on one side corresponding to the reception detection cable connector. When the electromagnet part is not powered on, the output end of the push-pull rod is pushed out under the action of the spring. When the electromagnet part is powered on, the push-pull rod is adsorbed inward, the push-pull rod overcomes the spring force, and the output end of the push-pull rod retracts a set distance.

[0010] The signal output end of the waveform generator is connected to the signal input end of the relay, the relay is provided with a single-pole double-throw switch, one output end of the relay is connected to the first electromagnet, and the other output end of the relay is connected to the second electromagnet.

[0011] It is further characterized by:

[0012] It also includes a power supply module, the power supply module includes a first output end and a second output end, the first output end and the second output end are respectively connected to the corresponding power input ends of the waveform generator and the relay through lines, the first output end is connected to the power input port of the relay through a first line, the relay includes two power output ports, namely a first power output port and a second power output port, the single-pole double-throw switch is used to switch the power output of the first power output port and the second power output port, the first electromagnet includes a first power input end and a second power input end, the second electromagnet includes a third power input end and a fourth power input end, the first power output port is connected to the first power input end of the first electromagnet, the second power output port is connected to the third power input end of the second electromagnet, and the second output end of the power supply module is respectively connected to the second power input end and the fourth power input end through wires;

[0013] The power module is specifically an AC-DC power module, the first output end of the power module is a positive output end, and the second output end is a negative output end;

[0014] The external connection structure at the output end of the push-pull rod is specifically a through hole, and the binding rope is fixedly connected to the cable through the through hole to form a fixed installation connection;

[0015] The signal period and duty cycle of the waveform generator are pre-set as parameters, and the waveform generator controls the on-off interval of the relay through the output drive signal.

[0016] After adopting the above technical scheme, at least one push-pull rod output end of the first electromagnet and the second electromagnet is fixedly connected to the cable on one side of the cable connector, and then the signal period and duty cycle of the preset waveform generator are used to drive the relay to periodically power the electromagnet, so that the output end of the push-pull rod is periodically pushed out and retracted, so that a periodic force acts on one side of the cable connector, and the stability of the periodic action and force is reliable and accurate. It is used for mechanical stress testing by periodically applying reciprocating force to the cable on one side of the cable connector. It has a simple structure, high detection efficiency, and good detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a connection schematic diagram of the present invention;

[0018] Figure 2 It is a connection diagram of a specific embodiment of the present invention;

[0019] Figure 3 It is a structural diagram of the electromagnet of the present invention;

[0020] The names corresponding to the serial numbers in the figure are as follows:

[0021] A first electromagnet 10, a first power input terminal 11, a second power input terminal 12, a second electromagnet 20, a third power input terminal 21, a fourth power input terminal 22, a waveform generator 30, a relay 40, a single-pole double-throw switch 41, a power input port 42, a first power output port 43, a second power output port 44, a power module 50, a first output terminal 51, a second output terminal 52, and a first circuit 60

[0022] Electromagnet part 1, push-pull rod 2, through hole 201, spring 3. DETAILED DESCRIPTION

[0023] A mechanical stress test device for the mechanical connection of a cable joint, see Figure 1-Figure 3 : It includes a first electromagnet 10, a second electromagnet 20, a waveform generator 30, and a relay 40;

[0024] The first electromagnet 10 and the second electromagnet 20 have the same structure, both including an electromagnet part 1, a push-pull rod 2, and a spring 3. The output end of the push-pull rod 2 is provided with an external connection structure, and the external connection structure is used to fix the cable on one side corresponding to the reception detection cable connector. When the electromagnet part 1 is not powered on, the output end of the push-pull rod 2 is pushed out under the action of the spring 3. When the electromagnet part 1 is powered on, the push-pull rod 2 is adsorbed inward, the push-pull rod 2 overcomes the force of the spring 3, and the output end of the push-pull rod 2 retracts a set distance.

[0025] The signal output end of the waveform generator 30 is connected to the signal input end of the relay 40 . The relay 40 is provided with a single-pole double-throw switch 41 . One output end of the relay 40 is connected to the first electromagnet 10 , and the other output end of the relay 40 is connected to the second electromagnet 20 .

[0026] For specific implementation, see Figure 2 , Figure 3:It also includes a power module 50, the power module 50 includes a first output terminal 51 and a second output terminal 52, the first output terminal 51 and the second output terminal 52 are respectively connected to the corresponding power input terminals of the waveform generator 30 and the relay 40 through lines, the first output terminal 51 is connected to the power input port 42 of the relay 40 through a first line 60, the relay 42 includes two power output ports, namely a first power output port 43 and a second power output port 44, the single-pole double-throw switch 41 is used to switch the power output of the first power output port 43 and the second power output port 44, the first electromagnet 20 includes a first power input terminal 11 and a second power input terminal 12, the second electromagnet 30 includes a third power input terminal 21 and a fourth power input terminal 22, the first power output port 43 is connected to the first power input terminal 11 of the first electromagnet 20, the second power output port 44 is connected to the third power input terminal 21 of the second electromagnet 30, and the second output terminal 52 of the power module 50 is respectively connected to the second power input terminal 12 and the fourth power input terminal 22 through wires.

[0027] In a specific implementation, the power module 50 is specifically an AC-DC power module, which converts the input alternating current into direct current output, and the first output terminal 51 of the power module 50 is a positive output terminal, and the second output terminal 52 is a negative output terminal;

[0028] The external connection structure of the output end of the push-pull rod 2 is specifically a through hole 201, and the binding rope is fixedly connected to the cable through the through hole 201 to form a fixed installation connection;

[0029] The signal cycle and duty cycle of the waveform generator 30 are pre-set with parameters, and the waveform generator 30 controls the switching interval of the relay through the output drive signal.

[0030] In specific implementation, the actual measurement can be made of flexible coaxial lines, ordinary wires, high-temperature wires or enameled wires with an outer diameter of 3mm to 8mm; the waveform generator sets the duty cycle through buttons, and the digital tube displays the cycle and duty cycle. When the cables and connectors of the two sets of electromagnets are the same, the duty cycle is 50%. The on and off time of the two electromagnets are set the same. When the cables or connectors of the two sets of electromagnets are different, the duty cycle is set according to actual needs. The models of the two sets of electromagnets are configured according to the mechanical stress to be measured by the cable and the cable connector to meet various stress test requirements. The total test duration is set as needed. In order to be able to check whether the cable connector is loose in a timely and effective manner, the cable used for detection is connected to the corresponding electrical equipment. By observing whether the electrical equipment is working properly, real-time feedback can be given on whether the cable connector connection is stable and reliable.

[0031] Its working principle is as follows: at least one push-pull rod output end of the first electromagnet and the second electromagnet is fixedly connected to the cable on one side of the cable connector, and then the signal period and duty cycle of the preset waveform generator are used to drive the relay to periodically power the electromagnet, so that the output end of the push-pull rod is periodically pushed out and retracted, so that a periodic force acts on one side of the cable connector, and the stability of the periodic action and force is reliable and accurate. It is used for mechanical stress testing by periodically applying reciprocating force to the cable on one side of the cable connector. It has a simple structure, high detection efficiency, and good detection accuracy.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mechanical stress testing device for a cable joint mechanical connection, characterized in that: It includes: A first electromagnet; A second electromagnet; Waveform generator; Relay; The first electromagnet and the second electromagnet are of the same structure, both including an electromagnet part, a push-pull rod, and a spring. The output end of the push-pull rod is provided with an external connection structure, and the external connection structure is used to fix the cable on one side corresponding to the reception detection cable connector. When the electromagnet part is not powered on, the output end of the push-pull rod is pushed out under the action of the spring. When the electromagnet part is powered on, the push-pull rod is adsorbed inward, the push-pull rod overcomes the spring force, and the output end of the push-pull rod retracts a set distance. The signal output end of the waveform generator is connected to the signal input end of the relay, the relay is provided with a single-pole double-throw switch, one output end of the relay is connected to the first electromagnet, and the other output end of the relay is connected to the second electromagnet; It also includes a power supply module, the power supply module includes a first output end and a second output end, the first output end and the second output end are respectively connected to the corresponding power input ends of the waveform generator and the relay through lines, the first output end is connected to the power input port of the relay through a first line, the relay includes two power output ports, namely a first power output port and a second power output port, the single-pole double-throw switch is used to switch the power output of the first power output port and the second power output port, the first electromagnet includes a first power input end and a second power input end, the second electromagnet includes a third power input end and a fourth power input end, the first power output port is connected to the first power input end of the first electromagnet, and the second power output port is connected to the third power input end of the second electromagnet, the second output end of the power supply module is respectively connected to the second power input end and the fourth power input end through wires; The signal period and duty cycle of the waveform generator are pre-set as parameters, and the waveform generator controls the on-off interval of the relay through the output drive signal.

2. A mechanical stress testing device for a cable joint mechanical connection according to claim 1, characterized in that: The power module is specifically an AC-DC power module, the first output end of the power module is a positive output end, and the second output end is a negative output end.

3. A mechanical stress testing device for a cable joint mechanical connection according to claim 1, characterized in that: The external connection structure of the output end of the push-pull rod is specifically a through hole, and the binding rope is fixedly connected to the cable through the through hole to form a fixed installation connection.

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