A heat resistance testing machine for enameled wire

Abstract

The present invention relates to the technical field of enameled wire heat resistance detection, specifically an enameled wire heat resistance tester, including a detection box, a current detection device, a wire, a power supply and a resistor; the upper and lower ends of the detection box are connected to fixed rods, and the two fixed rods are provided with clips; the upper and lower ends of the detection box are fixedly provided with wire connection ends, and the power supply and the resistor are connected in series on the wire; the current detection device is installed on the detection box, and the detection end of the current detection device is placed inside the detection box and vertically connected with a metal connecting rod, and a plurality of metal contact rods are connected to the metal connecting rod; the side of the detection box is connected with a ventilation pipe, and a fan and an electric heater are installed on the inner side of the ventilation pipe; the inner and outer sides of the detection box are respectively provided with a temperature sensor and a main control machine. The present invention can automatically record the time and temperature required for the insulation layer of the enameled wire to be detached, and there is no need for staff to observe the entire detection process at all times, and the detection is accurate, and it saves time and effort.

Description

Technical Field

[0001] The invention relates to the technical field of enameled wire heat resistance detection, in particular to an enameled wire heat resistance testing machine. Background Art

[0002] Enameled wire is a main type of winding wire, which consists of a conductor and an insulating layer. The bare wire is annealed and softened, then painted and baked for many times. However, it is not easy to produce products that meet both standard requirements and customer requirements. It is affected by factors such as raw material quality, process parameters, production equipment, and environment. Therefore, the quality characteristics of various enameled wires are different, but they all have four major properties: mechanical properties, chemical properties, electrical properties, and thermal properties. The enameled wire will generate high temperature due to load during operation, and the heat shock resistance of the paint film directly affects the safety of the enameled wire.

[0003] In the prior art, the testing process of the enameled wire is usually to use an air pump to blow the heat source through a conduit to the surface of the enameled wire to be tested to form an air wave, and finally manually observe the time when the insulating layer on the surface of the enameled wire is detached. This method requires the staff to observe the entire testing process at all times, which is time-consuming and laborious. In addition, since the insulating layer on the enameled wire is very thin, it is not easy to observe, which affects the test results. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems existing in the background technology, and the present invention provides an enameled wire heat resistance testing machine.

[0005] The technical solution of the present invention is as follows: a heat-resistant testing machine for enameled wires, comprising a testing box, a current detection device, a conductor, a power supply and a resistor; a box door is rotatably installed on the front side of the testing box, and a locking buckle is installed on the box door; the upper and lower ends inside the testing box are connected to fixed rods, and clips are provided on the two fixed rods; the upper and lower ends inside the testing box are fixedly provided with conductor connection ends, the power supply and the resistor are connected in series to the conductor, and the two ends of the conductor are respectively connected to the conductor connection ends on both sides; the current detection device is installed on the testing box, and the detection end of the current detection device is placed inside the testing box and is vertically connected to a metal connecting rod, and a plurality of metal contact rods are connected to the metal connecting rod; a ventilation pipe is connected to the side of the testing box, and a fan and an electric heater are installed on the inner side of the ventilation pipe; a temperature sensor and a main control machine are respectively installed on the inner and outer sides of the testing box, and the main control machine is electrically connected to the current detection device, the temperature sensor, the fan and the electric heater.

[0006] Preferably, a camera is installed at the top of the interior of the detection box, and the interior of the detection box is sealed with a heat-insulating glass for separating the camera; a heat dissipation port is provided at the top of the detection box and on one side adjacent to the camera.

[0007] Preferably, a purification box is provided on the detection box, and the purification box is filled with chemical agents. The upper and lower ends of the purification box are respectively connected to an exhaust pipe and a connecting pipe, and the other end of the connecting pipe is connected to the interior of the detection box.

[0008] Preferably, a measuring tube is fixedly provided at the bottom end of the detection box, and a cutting mechanism is provided on one side of the measuring tube.

[0009] Preferably, the cutting mechanism includes a fixed blade, a movable blade, a guide rod, a fixed block, a spring and a pressure plate, wherein the fixed blade is fixed at the bottom end of the detection box, the movable blade is arranged directly above the fixed blade, the fixed block is arranged on the side of the detection box, the guide rod movably passes through the fixed block and its upper and lower ends are respectively connected to the pressure plate and the movable blade, and the spring is sleeved on the guide rod.

[0010] Preferably, sleeves are fixedly provided on the wire connection ends on both sides.

[0011] Preferably, a transparent observation window is installed on the box door.

[0012] Preferably, the inner walls of the test box and the box door are both provided with a heat insulation layer.

[0013] Preferably, a dustproof net is installed on the inner side of the ventilation pipe.

[0014] Compared with the prior art, the above technical solution of the present invention has the following beneficial technical effects: when testing, the enameled wire body is cut into a set length, and then the cut enameled wire body is placed inside the detection box, and the enameled wire body is fixed by two provided clips, so that the two ends of the enameled wire body are respectively in contact with the wire connection ends on both sides, and the multiple metal contact rods are in contact with the surface of the enameled wire body, and then the power switch is turned on. At this time, current flows through the enameled wire body, but the current detection device does not detect the generation of current (because the surface of the enameled wire is provided with There is an insulation layer), then close and lock the box door, and start the test work. Turn on the switches of the fan and the electric heater. The fan blows the heat generated by the electric heater to the surface of the enameled wire body to form a heat wave. When the insulation layer on the surface of the enameled wire body is detached, the wires on its surface are exposed. At this time, the current detection device detects the generation of current and feeds back the detected signal to the main control machine, which then records the time and temperature required for the insulation layer of the enameled wire body to detach. There is no need for staff to observe the entire detection process all the time. The detection is accurate, time-saving and labor-saving, and the equipment cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a front view of the present invention.

[0017] Figure numerals: 1, detection box; 101, heat dissipation port; 2, main control machine; 3, current detection device; 4, clamp; 5, fixing rod; 6, wire connection end; 7, sleeve; 8, enameled wire body; 9, temperature sensor; 10, metal connecting rod; 11, metal contact rod; 12, power supply; 13, resistor; 14, wire; 15, camera; 16, ventilation pipe; 17, fan; 18, box door; 19, dustproof net; 20, electric heater; 21, insulation glass; 22, purification box; 23, connecting pipe; 24, exhaust pipe; 25, chemical agent; 26, measuring tube; 27, transparent observation window; 281, fixed blade; 282, moving blade; 29, guide rod; 30, fixing block; 31, spring; 32, pressure plate; 33, locking buckle; 34, insulation layer. DETAILED DESCRIPTION

[0018] Embodiment 1

[0019] like Figure 1-2 As shown, the present invention provides an enameled wire heat resistance tester, comprising a test box 1, a current detection device 3, a wire 14, a power supply 12 and a resistor 13; a box door 18 is rotatably mounted on the front side of the test box 1, and a locking buckle 33 is mounted on the box door 18; the upper and lower ends of the interior of the test box 1 are connected to fixed rods 5, and the two fixed rods 5 are provided with clips 4; the upper and lower ends of the interior of the test box 1 are fixedly provided with wire connection terminals 6, the power supply 12 and the resistor 13 are connected in series to the wire 14, and the two ends of the wire 14 are respectively connected to the wire connection terminals 6 on both sides. The current detection device 3 is installed on the detection box 1, and the detection end of the current detection device 3 is placed inside the detection box 1 and is vertically connected with a metal connecting rod 10, and a plurality of metal contact rods 11 are connected to the metal connecting rod 10; a ventilation pipe 16 is connected to the side of the detection box 1, and a fan 17 and an electric heater 20 are installed on the inner side of the ventilation pipe 16; a temperature sensor 9 and a main control machine 2 are respectively installed on the inner and outer sides of the detection box 1, and the main control machine 2 is electrically connected to the current detection device 3, the temperature sensor 9, the fan 17 and the electric heater 20.

[0020] The working principle and detection method of the present invention are as follows: when testing, the enameled wire body 8 is cut into a set length, and then the cut enameled wire body 8 is placed inside the detection box 1, and the enameled wire body 8 is fixed by two provided clips 4, so that the two ends of the enameled wire body 8 are respectively in contact with the wire connection ends 6 on both sides, and multiple metal contact rods 11 are in contact with the surface of the enameled wire body 8, and then the switch of the power supply 12 is turned on. At this time, current flows through the enameled wire body 8, but the current detection device 3 does not detect the generation of current (because the surface of the enameled wire is provided with an insulating layer). , then close and lock the box door 18 to start the test work, turn on the switches of the fan 17 and the electric heater 20, and the fan 17 blows the heat generated by the electric heater 20 to the surface of the enameled wire body 8 to form a heat wave. When the insulating layer on the surface of the enameled wire body 8 is detached, the wires on its surface are exposed. At this time, the current detection device 3 detects the generation of current and feeds back the detected signal to the main control machine 2, and the main control machine 2 records the time and temperature required for the insulation layer of the enameled wire body 8 to detach, so that the staff does not need to observe the entire detection process at all times, the detection is accurate, and it saves time and effort.

[0021] Embodiment 2

[0022] like Figure 1-2 As shown, the present invention provides an enameled wire heat resistance tester, comprising a test box 1, a current detection device 3, a wire 14, a power supply 12 and a resistor 13; a box door 18 is rotatably mounted on the front side of the test box 1, and a locking buckle 33 is mounted on the box door 18; the upper and lower ends of the interior of the test box 1 are connected to fixed rods 5, and the two fixed rods 5 are provided with clips 4; the upper and lower ends of the interior of the test box 1 are fixedly provided with wire connection terminals 6, the power supply 12 and the resistor 13 are connected in series to the wire 14, and the two ends of the wire 14 are respectively connected to the wire connection terminals 6 on both sides. The current detection device 3 is installed on the detection box 1, and the detection end of the current detection device 3 is placed inside the detection box 1 and is vertically connected with a metal connecting rod 10, and a plurality of metal contact rods 11 are connected to the metal connecting rod 10; a ventilation pipe 16 is connected to the side of the detection box 1, and a fan 17 and an electric heater 20 are installed on the inner side of the ventilation pipe 16; a temperature sensor 9 and a main control machine 2 are respectively installed on the inner and outer sides of the detection box 1, and the main control machine 2 is electrically connected to the current detection device 3, the temperature sensor 9, the fan 17 and the electric heater 20.

[0023] A camera 15 is installed at the top of the detection box 1 , and a heat-insulating glass 21 for separating the camera 15 is sealed inside the detection box 1 . A heat dissipation port 101 is provided at the top of the detection box 1 and on one side adjacent to the camera 15 .

[0024] In this embodiment, the camera 15 is configured to record the process of the paint film fluctuation, cracking and detachment of the enameled wire body 8, which is convenient for subsequent viewing.

[0025] Embodiment 3

[0026] like Figure 1-2 As shown, the present invention provides an enameled wire heat resistance tester, comprising a test box 1, a current detection device 3, a wire 14, a power supply 12 and a resistor 13; a box door 18 is rotatably mounted on the front side of the test box 1, and a locking buckle 33 is mounted on the box door 18; the upper and lower ends of the interior of the test box 1 are connected to fixed rods 5, and the two fixed rods 5 are provided with clips 4; the upper and lower ends of the interior of the test box 1 are fixedly provided with wire connection terminals 6, the power supply 12 and the resistor 13 are connected in series to the wire 14, and the two ends of the wire 14 are respectively connected to the wire connection terminals 6 on both sides. The current detection device 3 is installed on the detection box 1, and the detection end of the current detection device 3 is placed inside the detection box 1 and is vertically connected with a metal connecting rod 10, and a plurality of metal contact rods 11 are connected to the metal connecting rod 10; a ventilation pipe 16 is connected to the side of the detection box 1, and a fan 17 and an electric heater 20 are installed on the inner side of the ventilation pipe 16; a temperature sensor 9 and a main control machine 2 are respectively installed on the inner and outer sides of the detection box 1, and the main control machine 2 is electrically connected to the current detection device 3, the temperature sensor 9, the fan 17 and the electric heater 20.

[0027] The detection box 1 is provided with a purification box 22 filled with chemical agents 25 . The upper and lower ends of the purification box 22 are respectively connected to an exhaust pipe 24 and a connecting pipe 23 . The other end of the connecting pipe 23 is connected to the interior of the detection box 1 .

[0028] In this embodiment, harmful gas is generated on the surface of the enameled wire body 8 after being heated. The harmful gas is introduced into the purification box 22 through the connecting pipe 23. The chemical agent 25 provided in the purification box 22 reacts with the gas to remove harmful substances contained in the gas.

[0029] Embodiment 4

[0030] like Figure 1-2As shown, the present invention provides an enameled wire heat resistance tester, comprising a test box 1, a current detection device 3, a wire 14, a power supply 12 and a resistor 13; a box door 18 is rotatably mounted on the front side of the test box 1, and a locking buckle 33 is mounted on the box door 18; the upper and lower ends of the interior of the test box 1 are connected to fixed rods 5, and the two fixed rods 5 are provided with clips 4; the upper and lower ends of the interior of the test box 1 are fixedly provided with wire connection terminals 6, the power supply 12 and the resistor 13 are connected in series to the wire 14, and the two ends of the wire 14 are respectively connected to the wire connection terminals 6 on both sides. The current detection device 3 is installed on the detection box 1, and the detection end of the current detection device 3 is placed inside the detection box 1 and is vertically connected with a metal connecting rod 10, and a plurality of metal contact rods 11 are connected to the metal connecting rod 10; a ventilation pipe 16 is connected to the side of the detection box 1, and a fan 17 and an electric heater 20 are installed on the inner side of the ventilation pipe 16; a temperature sensor 9 and a main control machine 2 are respectively installed on the inner and outer sides of the detection box 1, and the main control machine 2 is electrically connected to the current detection device 3, the temperature sensor 9, the fan 17 and the electric heater 20.

[0031] A measuring tube 26 is fixedly provided at the bottom end of the detection box 1, and a cutting mechanism is provided on one side of the measuring tube 26; the cutting mechanism includes a fixed blade 281, a movable blade 282, a guide rod 29, a fixed block 30, a spring 31 and a pressure plate 32, wherein the fixed blade 281 is fixed at the bottom end of the detection box 1, the movable blade 282 is arranged directly above the fixed blade 281, the fixed block 30 is arranged on the side of the detection box 1, the guide rod 29 movably passes through the fixed block 30 and its upper and lower ends are respectively connected to the pressure plate 32 and the movable blade 282, and the spring 31 is sleeved on the guide rod 29.

[0032] In this embodiment, the enameled wire is inserted into the measuring tube 26. When the enameled wire moves to a specified position, the pressure plate 32 is pressed downward, and the pressure plate 32 drives the guide rod 29 and the movable blade 282 to move downward, so that the enameled wire can be cut. At this time, the length of the enameled wire cut is exactly the length required for the test.

[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An enameled wire heat resistance testing machine, characterized in that: The invention comprises a detection box (1), a current detection device (3), a wire (14), a power source (12) and a resistor (13); a box door (18) is rotatably mounted on the front side of the detection box (1), and a locking buckle (33) is mounted on the box door (18); the upper and lower ends of the detection box (1) are connected to fixing rods (5), and the two fixing rods (5) are provided with clips (4); the upper and lower ends of the detection box (1) are fixedly provided with wire connection ends (6), the power source (12) and the resistor (13) are connected in series to the wire (14), and the two ends of the wire (14) are respectively connected to the wire connection ends (6) on both sides; the current detection device (3 ) is installed on a detection box (1), the detection end of the current detection device (3) is placed inside the detection box (1) and is vertically connected to a metal connecting rod (10), and a plurality of metal contact rods (11) are connected to the metal connecting rod (10); a ventilation pipe (16) is arranged on the side of the detection box (1), and a fan (17) and an electric heater (20) are installed on the inner side of the ventilation pipe (16); a temperature sensor (9) and a main control machine (2) are installed on the inner and outer sides of the detection box (1), respectively, and the main control machine (2) is electrically connected to the current detection device (3), the temperature sensor (9), the fan (17) and the electric heater (20).

2. The enameled wire heat resistance testing machine according to claim 1, characterized in that: A camera (15) is installed at the top of the interior of the detection box (1), and a heat-insulating glass (21) for separating the camera (15) is sealed inside the detection box (1); a heat dissipation port (101) is provided at the top of the detection box (1) and on a side adjacent to the camera (15).

3. The enameled wire heat resistance testing machine according to claim 1, characterized in that: A purification box (22) is arranged on the detection box (1), and the purification box (22) is filled with chemical agents (25). The upper and lower ends of the purification box (22) are respectively connected to an exhaust pipe (24) and a connecting pipe (23), and the other end of the connecting pipe (23) is connected to the interior of the detection box (1).

4. The enameled wire heat resistance testing machine according to claim 1, characterized in that: A measuring tube (26) is fixedly arranged at the bottom end of the detection box (1), and a cutting mechanism is arranged on one side of the measuring tube (26).

5. The enameled wire heat resistance testing machine according to claim 4, characterized in that: The cutting mechanism comprises a fixed blade (281), a movable blade (282), a guide rod (29), a fixed block (30), a spring (31) and a pressure plate (32), wherein the fixed blade (281) is fixed at the bottom end of the detection box (1), the movable blade (282) is arranged directly above the fixed blade (281), the fixed block (30) is arranged at the side of the detection box (1), the guide rod (29) movably passes through the fixed block (30) and the upper and lower ends thereof are respectively connected to the pressure plate (32) and the movable blade (282), and the spring (31) is sleeved on the guide rod (29).

6. The enameled wire heat resistance testing machine according to claim 1, characterized in that: Sleeves (7) are fixedly arranged on the wire connection ends (6) on both sides.

7. The enameled wire heat resistance testing machine according to claim 1, characterized in that: A transparent observation window (27) is installed on the box door (18).

8. The enameled wire heat resistance testing machine according to claim 1, characterized in that: A heat insulation layer (34) is provided on the inner walls of the detection box (1) and the box door (18).

9. The enameled wire heat resistance testing machine according to claim 1, characterized in that: A dustproof net (19) is installed on the inner side of the ventilation pipe (16).

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