A thermocouple spot welding device suitable for various types of pipelines

Abstract

The present invention belongs to the field of thermocouple welding processing, and provides a thermocouple spot welding device suitable for various models of pipelines, including a power module, a first delay circuit, a second delay circuit, a MOS tube and an electric energy output terminal, wherein the power module is electrically connected to the first delay circuit and the second delay circuit to provide DC working power, the first delay circuit is electrically connected to the second delay circuit, the first delay circuit provides operation time, the second delay circuit provides energy release time, the MOS tube is electrically connected to the second delay circuit, and the MOS tube is electrically connected to the electric energy output terminal to output electric energy. The present invention controls the discharge time through a low-resistance farad capacitor, discharges and welds thermocouple wires of about one millimeter or more, and has a stable application effect, so that the pipeline thermocouple wire welding has high reliability.

Description

Technical Field

[0001] The invention relates to the field of thermocouple welding processing, and in particular to a thermocouple spot welding device suitable for various types of pipelines. Background Art

[0002] At present, the commonly used on-site pipeline thermocouple wire welding uses a capacitor discharge with a voltage of about 100V, and spot welds thermocouple wires with a diameter of about 1 mm. Due to the high voltage, the discharge process is difficult to control, and often the discharge process creates a pit on the pipeline, damaging the pipeline mother material and causing damage to the mother material. A certain thickness needs to be polished to eliminate the pit, and the welding discharge sound is very loud, the reliability is relatively poor, and it is easy to make false welding. It is easy to disconnect during the heat treatment process, interrupting the heat treatment and affecting the heat treatment quality. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a thermocouple spot welding device suitable for various types of pipelines, comprising a power supply module, a first delay circuit, a second delay circuit, a MOS tube and an electric energy output end, wherein the power supply module is electrically connected to the first delay circuit and the second delay circuit for providing DC working power, the first delay circuit is electrically connected to the second delay circuit, the first delay circuit provides an operation time, the second delay circuit provides an energy release time, the MOS tube is electrically connected to the second delay circuit, and the MOS tube is electrically connected to the electric energy output end for outputting electric energy.

[0005] Preferably, the power supply module includes a battery pack, a constant current power supply, a control switch, an eighth capacitor and a three-terminal voltage regulator. The constant current power supply and the eighth capacitor are connected in series, the battery pack, the constant current power supply and the eighth capacitor are connected in parallel, the negative pole of the battery pack is grounded, the positive pole of the battery pack is connected to the input terminal of the three-terminal voltage regulator, the control switch is located between the battery pack and the three-terminal voltage regulator, the ground terminal of the three-terminal voltage regulator is grounded, and the output terminal of the three-terminal voltage regulator is electrically connected to the 4th pin of the second timer.

[0006] Preferably, the power supply module includes a battery pack, a constant current power supply, a control switch, an eighth capacitor and a three-terminal voltage regulator. The constant current power supply and the eighth capacitor are connected in series, the battery pack, the constant current power supply and the eighth capacitor are connected in parallel, the negative pole of the battery pack is grounded, the positive pole of the battery pack is connected to the input terminal of the three-terminal voltage regulator, the control switch is located between the battery pack and the three-terminal voltage regulator, the ground terminal of the three-terminal voltage regulator is grounded, and the output terminal of the three-terminal voltage regulator is electrically connected to the 4th connection terminal of the second timer.

[0007] Preferably, the first delay circuit includes a first timer, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first photocoupler, an NPN transistor, a first capacitor, a second capacitor, a third capacitor and a key switch, and the second delay circuit includes a second timer, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a second photocoupler, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor.

[0008] Preferably, the 8th pin of the first timer is electrically connected to the electrical connection point between the output end of the three-terminal regulator and the 4th pin of the second timer, one end of the third resistor is electrically connected to the electrical connection node between the 8th connection end of the first timer and the output end of the three-terminal regulator, the other end of the third resistor is electrically connected to one end of the fourth resistor, the other end of the fourth resistor is electrically connected to the 7th pin of the first timer, the 6th pin of the first timer is electrically connected to the electrical connection node between one end of the fourth resistor and the 7th pin of the first timer, the positive electrode of the third capacitor is electrically connected to the electrical connection point between the fourth resistor and the 7th pin of the first timer, the negative electrode of the third capacitor is electrically connected to one end of the first capacitor, and the The other end of a capacitor is electrically connected to the 5th pin of the first timer, the 4th pin of the first timer is electrically connected to the electrical connection point between the output end of the three-terminal regulator and the 4th pin of the second timer, the 1st pin of the first timer is electrically connected to one end of a first resistor, the 2nd pin of the first timer is electrically connected to the other end of the first resistor, the electrical connection point between the first resistor and the 1st pin of the first timer is grounded, one end of the push switch is electrically connected to the electrical connection point between the first resistor and the 2nd pin of the first timer, the other end of the push switch is electrically connected to the electrical connection point between the output end of the three-terminal regulator and the 4th pin of the second timer, and the 3rd pin of the first timer is electrically connected to one end of the second resistor.

[0009] Preferably, the 8th pin of the second timer is electrically connected to the electrical connection point between the output end of the three-terminal regulator and the 4th pin of the second timer, one end of the eighth resistor is electrically connected to the electrical connection node between the 8th pin of the second timer and the output end of the three-terminal regulator, one end of the eighth resistor is electrically connected to one end of the ninth resistor, the other end of the ninth resistor is electrically connected to the 7th pin of the second timer, the 6th pin of the second timer is electrically connected to the electrical connection node between one end of the ninth resistor and the 7th pin of the second timer, the positive electrode of the sixth capacitor is electrically connected to the electrical connection node between one end of the ninth resistor and the 6th pin of the second timer, the negative electrode of the sixth capacitor is electrically connected to one end of the seventh capacitor, and the other end of the seventh capacitor is electrically connected to the output end of the three-terminal regulator and the second timer. The electrical connection node between the fourth pin and the fourth pin of the timer, one end of the fifth capacitor is electrically connected to the fifth pin of the second timer, the other end of the fifth capacitor is electrically connected to the negative electrode of the sixth capacitor, the electrical connection point between the fifth capacitor and the sixth capacitor is grounded, the first pin of the second timer is electrically connected to one end of the sixth resistor, the other end of the sixth resistor is electrically connected to the second pin of the second timer, the electrical connection point between the sixth resistor and the first pin of the second timer is grounded, one end of the fourth capacitor is electrically connected to the electrical connection point between the first pin of the second timer and the sixth resistor, the other end of the fourth capacitor is electrically connected to the electrical connection point between the output end of the three-terminal regulator and the fourth pin of the second timer, and the third pin of the second timer is electrically connected to one end of the seventh resistor.

[0010] Preferably, the base of the NPN transistor is electrically connected to the other end of the second resistor, the emitter of the NPN transistor is grounded, the collector of the NPN transistor is electrically connected to one end of the fifth resistor, the other end of the fifth resistor is electrically connected to the electrical connection point between the battery pack and the control switch, the positive pole of the second capacitor is electrically connected to the electrical connection point between the fifth resistor and the collector of the NPN transistor, the negative pole of the second capacitor is electrically connected to the anode of the first photocoupler, the cathode of the first photocoupler is electrically connected to the electrical connection point between the first capacitor and the third capacitor, the collector of the first photocoupler is electrically connected to the electrical connection point between the output end of the three-terminal regulator and the fourth pin of the second timer, and the emitter of the first photocoupler is electrically connected to the electrical connection point between the sixth resistor and the second pin of the second timer.

[0011] Preferably, the other end of the seventh resistor is electrically connected to the anode of the second photocoupler, the cathode of the second photocoupler is electrically connected to one end of the tenth resistor, the electrical connection point between the second photocoupler and one end of the tenth resistor is grounded, the collector of the second photocoupler is electrically connected to one end of the eleventh resistor, the other end of the eleventh resistor is electrically connected to the electrical connection point between the output end of the three-terminal regulator and the fourth pin of the second timer, the emitter of the second photocoupler is electrically connected to the other end of the tenth resistor, and the MOS tube is electrically connected to the electrical connection point between the emitter of the second photocoupler and the tenth resistor.

[0012] Preferably, the first timer and the second timer are both 555 timers, the first photoelectric coupler and the second photoelectric coupler are both PC817 models, and the third resistor and the eighth resistor are both sliding resistors.

[0013] Preferably, the MOS tube model is IRL40SC228.

[0014] Preferably, the three-terminal regulator model is 7812.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the preparation time of 1 to 5 seconds provided by the first delay circuit can be adjusted and selected by the potentiometer R3, the second timer is automatically turned on when the preparation time is up, the timing time of 1MS to 5MS is selected by adjusting the size of the potentiometer R8 to control the welding time, the timer controls the conduction time of the MOS tube, the welding time is adjusted according to the length of the wiring and the size of the thermocouple wire, and the welding time is controlled to ensure the welding effect; the first delay circuit mainly provides the operation time, the second delay circuit mainly provides the energy release time, the welding time is reasonably set, and other parameters such as the current, voltage and welding speed are combined to ensure that the welding process is neither too fast nor too slow, to achieve smooth and low-noise welding, to achieve fully fused and defect-free welding, and to improve the reliability of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a framework diagram of a thermocouple spot welding device for pipes of various models.

[0017] Figure 2 The invention is a circuit diagram of a thermocouple spot welding device for pipelines of various models.

[0018] Description of the drawings: 1. Power module, 2. First delay circuit, 3. Second delay circuit, 4. MOS tube, 5. Output end. DETAILED DESCRIPTION

[0019] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0020] Embodiment 1

[0021] Please refer to Figure 1 and Figure 2 The present invention provides a thermocouple spot welding device suitable for various types of pipelines, including a power module 1, a first delay circuit 2, a second delay circuit 3, a MOS tube 4 and an electric energy output terminal 5. The power module 1 is electrically connected to the first delay circuit 2 and the second delay circuit 3 to provide DC working power. The first delay circuit 2 is electrically connected to the second delay circuit 3. The first delay circuit 2 provides an operation time, and the second delay circuit 3 provides an energy release time. The MOS tube 4 is electrically connected to the second delay circuit 3, and the MOS tube 4 is electrically connected to the electric energy output terminal 5 to output electric energy.

[0022] In one embodiment, if Figure 2 As shown, the power module 1 includes a battery pack VCC1, a constant current power supply VCC2, a control switch S1, an eighth capacitor C8 and a three-terminal voltage regulator U1, the constant current power supply VCC2 and the eighth capacitor C8 are connected in series, the battery pack VCC1 is connected in parallel with the constant current power supply VCC2 and the eighth capacitor C8, the negative electrode of the battery pack VCC1 is grounded, the positive electrode of the battery pack VCC1 is connected to the input end of the three-terminal voltage regulator U1, the control switch S1 is located between the battery pack VCC1 and the three-terminal voltage regulator U1, the ground end of the three-terminal voltage regulator U1 is grounded, and the output end of the three-terminal voltage regulator U1 is electrically connected to the 4th pin of the second timer TP2.

[0023] In one embodiment, if Figure 2 As shown, the first delay circuit 2 includes a first timer TP1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first photocoupler OC1, an NPN transistor V1, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a key switch S2, and the second delay circuit 3 includes a second timer TP2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a second photocoupler OC2, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7.

[0024] In one embodiment, if Figure 2As shown, the 8th pin of the first timer TP1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, one end of the third resistor R3 is electrically connected to the electrical connection node between the 8th connection end of the first timer TP1 and the output end of the three-terminal regulator U1, the other end of the third resistor R3 is electrically connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is electrically connected to the 7th pin of the first timer TP1, the 6th pin of the first timer TP1 is electrically connected to the electrical connection node between one end of the fourth resistor R4 and the 7th pin of the first timer TP1, the positive electrode of the third capacitor C3 is electrically connected to the electrical connection point between the fourth resistor R4 and the 7th pin of the first timer TP1, the negative electrode of the third capacitor C3 is electrically connected to one end of the first capacitor C1, and the first capacitor The other end of C1 is electrically connected to the 5th pin of the first timer TP1, the 4th pin of the first timer TP1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, the 1st pin of the first timer TP1 is electrically connected to one end of the first resistor R1, the 2nd pin of the first timer TP1 is electrically connected to the other end of the first resistor R1, the electrical connection point between the first resistor R1 and the 1st pin of the first timer TP1 is grounded, one end of the key switch S2 is electrically connected to the electrical connection point between the first resistor R1 and the 2nd pin of the first timer TP1, the other end of the key switch S2 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, and the 3rd pin of the first timer TP1 is electrically connected to one end of the second resistor R2.

[0025] In one embodiment, if Figure 2As shown, the 8th pin of the second timer TP2 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, one end of the eighth resistor R8 is electrically connected to the electrical connection node between the 8th pin of the second timer TP2 and the output end of the three-terminal regulator U1, one end of the eighth resistor R8 is electrically connected to one end of the ninth resistor R9, and the other end of the ninth resistor R9 is electrically connected to the 7th pin of the second timer TP2, the 6th pin of the second timer TP2 is electrically connected to the electrical connection node between one end of the ninth resistor R9 and the 7th pin of the second timer TP2, the positive electrode of the sixth capacitor C6 is electrically connected to the electrical connection node between one end of the ninth resistor R9 and the 6th pin of the second timer TP2, the negative electrode of the sixth capacitor C6 is electrically connected to one end of the seventh capacitor C7, and the other end of the seventh capacitor C7 is electrically connected to the output end of the three-terminal regulator U1 and the second timer An electrical connection node between the fourth pin of the second timer TP2, one end of the fifth capacitor C5 is electrically connected to the fifth pin of the second timer TP2, the other end of the fifth capacitor C5 is electrically connected to the negative electrode of the sixth capacitor C6, the electrical connection point between the fifth capacitor C5 and the sixth capacitor C6 is grounded, the first pin of the second timer TP2 is electrically connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is electrically connected to the second pin of the second timer TP2, the electrical connection point between the sixth resistor R6 and the first pin of the second timer TP2 is grounded, one end of the fourth capacitor C4 is electrically connected to the electrical connection point between the first pin of the second timer TP2 and the sixth resistor R6, the other end of the fourth capacitor C4 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the fourth pin of the second timer TP2, and the third pin of the second timer TP2 is electrically connected to one end of the seventh resistor R7.

[0026] In one embodiment, if Figure 2 As shown, the base of the NPN transistor V1 is electrically connected to the other end of the second resistor R2, the emitter of the NPN transistor V1 is grounded, the collector of the NPN transistor V1 is electrically connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is electrically connected to the electrical connection point between the battery pack VCC1 and the control switch S1, the positive electrode of the second capacitor C2 is electrically connected to the electrical connection point between the fifth resistor R5 and the collector of the NPN transistor V1, the negative electrode of the second capacitor C2 is electrically connected to the anode of the first photocoupler OC1, the cathode of the first photocoupler OC1 is electrically connected to the electrical connection point between the first capacitor C1 and the third capacitor C3, the collector of the first photocoupler OC1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the fourth pin of the second timer TP2, and the emitter of the first photocoupler OC1 is electrically connected to the electrical connection point between the sixth resistor R6 and the second pin of the second timer TP2.

[0027] In one embodiment, if Figure 2 As shown, the other end of the seventh resistor R7 is electrically connected to the anode of the second photocoupler OC2, the cathode of the second photocoupler OC2 is electrically connected to one end of the tenth resistor R10, the electrical connection point between the second photocoupler OC2 and one end of the tenth resistor R10 is grounded, the collector of the second photocoupler OC2 is electrically connected to one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the fourth pin of the second timer TP2, the emitter of the second photocoupler OC2 is electrically connected to the other end of the tenth resistor R10, and the MOS tube 4 is electrically connected to the electrical connection point between the emitter of the second photocoupler OC2 and the tenth resistor R10.

[0028] In one embodiment, the first timer TP1 and the second timer TP2 are both 555 timers, the first photocoupler OC1 and the second photocoupler OC2 are both PC817, and the third resistor R3 and the eighth resistor R8 are both sliding resistors.

[0029] In one embodiment, the MOS tube 4 is of model IRL40SC228.

[0030] In one embodiment, if Figure 2 As shown, the three-terminal regulator U1 is model 7812.

[0031] Embodiment 2

[0032] Please refer to Figure 1 and Figure 2 The present invention provides a thermocouple spot welding device suitable for various types of pipelines, including a power module 1, a first delay circuit 2, a second delay circuit 3, a MOS tube 4 and an electric energy output terminal 5. The power module 1 is electrically connected to the first delay circuit 2 and the second delay circuit 3 to provide DC working power. The first delay circuit 2 is electrically connected to the second delay circuit 3. The first delay circuit 2 provides an operation time, and the second delay circuit 3 provides an energy release time. The MOS tube 4 is electrically connected to the second delay circuit 3, and the MOS tube 4 is electrically connected to the electric energy output terminal 5 to output electric energy.

[0033] In one embodiment, if Figure 2As shown, the power module 1 includes a battery pack VCC1, a constant current power supply VCC2, a control switch S1, an eighth capacitor C8 and a three-terminal regulator U1. The constant current power supply VCC2 and the eighth capacitor C8 are connected in series, the battery pack VCC1 is connected in parallel with the constant current power supply VCC2 and the eighth capacitor C8, the charge of the eighth capacitor C8 is 300-600uF, the voltage that the eighth capacitor C8 can carry is 8.1-13.5V, the negative electrode of the battery pack VCC1 is grounded, the voltage of the battery pack VCC1 is +12V, the positive electrode of the battery pack VCC1 is connected to the input end of the three-terminal regulator U1, the control switch S1 is located between the battery pack VCC1 and the three-terminal regulator U1, the ground end of the three-terminal regulator U1 is grounded, and the output end of the three-terminal regulator U1 is electrically connected to the 4th pin of the second timer TP2.

[0034] In one embodiment, if Figure 2 As shown, the first delay circuit 2 includes a first timer TP1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first photocoupler OC1, an NPN transistor V1, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a key switch S2, and the second delay circuit 3 includes a second timer TP2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a second photocoupler OC2, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7.

[0035] In one embodiment, if Figure 2As shown, the 8th pin of the first timer TP1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, one end of the third resistor R3 is electrically connected to the electrical connection node between the 8th pin of the first timer TP1 and the output end of the three-terminal regulator U1, the resistance of the third resistor R3 is 10KΩ, one end of the third resistor R3 is electrically connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is electrically connected to the 7th pin of the first timer TP1, the resistance of the fourth resistor R4 is 2KΩ, the 6th pin of the first timer TP1 is electrically connected to the electrical connection node between one end of the fourth resistor R4 and the 7th pin of the first timer TP1, the positive electrode of the third capacitor C3 is electrically connected to the electrical connection point between the fourth resistor R4 and the 7th pin of the first timer TP1, the charge of the third capacitor C3 is 470uF, the negative electrode of the third capacitor C3 is electrically connected to one end of the first capacitor C1, the first capacitor C1 The other end is electrically connected to the 5th pin of the first timer TP1, the charge of the first capacitor C1 is 0.01uF, the 4th pin of the first timer TP1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, the 1st pin of the first timer TP1 is electrically connected to one end of the first resistor R1, the 2nd pin of the first timer TP1 is electrically connected to the other end of the first resistor R1, the electrical connection point between the first resistor R1 and the 1st pin of the first timer TP1 is grounded, and the resistance of the first resistor R1 is 10KΩ, one end of the key switch S2 is electrically connected to the electrical connection point between the first resistor R1 and the 2nd pin of the first timer TP1, the other end of the key switch S2 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, the 3rd pin of the first timer TP1 is electrically connected to one end of the second resistor R2, and the resistance of the second resistor R2 is 20KΩ.

[0036] In one embodiment, if Figure 2As shown, the 8th pin of the second timer TP2 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, one end of the eighth resistor R8 is electrically connected to the electrical connection node between the 8th pin of the second timer TP2 and the output end of the three-terminal regulator U1, the resistance of the eighth resistor R8 is 4.7KΩ, one end of the eighth resistor R8 is electrically connected to one end of the ninth resistor R9, the resistance of the ninth resistor R9 is 100Ω, and the other end of the ninth resistor R9 is electrically connected to the second timer TP2 The 7th pin of the second timer TP2, the 6th pin of the second timer TP2 is electrically connected to the electrical connection node between one end of the ninth resistor R9 and the 7th pin of the second timer TP2, the positive electrode of the sixth capacitor C6 is electrically connected to the electrical connection node between one end of the ninth resistor R9 and the 6th pin of the second timer TP2, the charge amount of the sixth capacitor C6 is 10uF, the negative electrode of the sixth capacitor C6 is electrically connected to one end of the seventh capacitor C7, and the other end of the seventh capacitor C7 is electrically connected between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2. The electrical connection node is connected to the seventh capacitor C7, the charge of which is 0.1uF, one end of the fifth capacitor C5 is electrically connected to the fifth pin of the second timer TP2, the other end of the fifth capacitor C5 is electrically connected to the negative electrode of the sixth capacitor C6, the charge of the fifth capacitor C5 is 0.01uF, the electrical connection point between the fifth capacitor C5 and the sixth capacitor C6 is grounded, the first pin of the second timer TP2 is electrically connected to one end of the sixth resistor R6, and the other end of the sixth resistor R6 is electrically connected to the second pin of the second timer TP2. The resistance of the sixth resistor R4 is 10KΩ, the electrical connection point between the sixth resistor R6 and the first pin of the second timer TP2 is grounded, one end of the fourth capacitor C4 is electrically connected to the electrical connection point between the first pin of the second timer TP2 and the sixth resistor R6, the other end of the fourth capacitor C4 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the fourth pin of the second timer TP2, the third pin of the second timer TP2 is electrically connected to one end of the seventh resistor R7, and the resistance of the seventh resistor R7 is 510Ω.

[0037] In one embodiment, if Figure 2As shown, the base of the NPN transistor V1 is electrically connected to the other end of the second resistor R2, the emitter of the NPN transistor V1 is grounded, the collector of the NPN transistor V1 is electrically connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is electrically connected to the electrical connection point between the battery pack VCC1 and the control switch S1, the resistance of the fifth resistor R5 is 1KΩ, the positive electrode of the second capacitor C2 is electrically connected to the electrical connection point between the fifth resistor R5 and the collector of the NPN transistor V1, the negative electrode of the second capacitor C2 is electrically connected to the anode of the first photocoupler OC1, the charge amount of the second capacitor C2 is 100uF, the cathode of the first photocoupler OC1 is electrically connected to the electrical connection point between the first capacitor C1 and the third capacitor C3, the collector of the first photocoupler OC1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, and the emitter of the first photocoupler OC1 is electrically connected to the electrical connection point between the sixth resistor R6 and the 2nd pin of the second timer TP2.

[0038] In one embodiment, if Figure 2 As shown, the other end of the seventh resistor R7 is electrically connected to the anode of the second photocoupler OC2, the cathode of the second photocoupler OC2 is electrically connected to one end of the tenth resistor R10, the electrical connection point between the second photocoupler OC2 and one end of the tenth resistor R10 is grounded, the resistance of the tenth resistor R10 is 10KΩ, the collector of the second photocoupler OC2 is electrically connected to one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the fourth pin of the second timer TP2, the resistance of the eleventh resistor R11 is 1KΩ, the emitter of the second photocoupler OC2 is electrically connected to the other end of the tenth resistor R10, and the MOS tube 4 is electrically connected to the electrical connection point between the emitter of the second photocoupler OC2 and the tenth resistor R10.

[0039] In one embodiment, the first timer TP1 and the second timer TP2 are both 555 timers, the first photocoupler OC1 and the second photocoupler OC2 are both PC817, and the third resistor R3 and the eighth resistor R8 are both sliding resistors.

[0040] In one embodiment, the model of the MOS tube 4 is IRL40SC228, the rated voltage of the MOS tube 4 is 40V, and the rated current of the MOS tube 4 is 557A.

[0041] In one embodiment, if Figure 2 As shown, the three-terminal regulator U1 is model 7812.

[0042] How to use: Combined Figure 1~2 As shown, the present invention provides a preparation time of 1 to 5 seconds provided by the first delay circuit 2, which can be adjusted and selected by the potentiometer R3. When the preparation time is reached, the second timer TP2 is automatically turned on. The timing time is 1MS to 5MS, and the welding time is controlled by adjusting the size of the potentiometer R8. The timer controls the conduction time of the MOS tube 4, and adjusts the welding time according to the length of the wiring and the size of the thermocouple wire, etc., and controls the welding time to ensure the welding effect.

[0043] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A thermocouple spot welding device suitable for various types of pipelines, characterized by: The invention comprises a power module (1), a first delay circuit (2), a second delay circuit (3), a MOS tube (4) and an electric energy output terminal (5), wherein the power module (1) is electrically connected to the first delay circuit (2) and the second delay circuit (3) and is used to provide direct current working electric energy, the first delay circuit (2) is electrically connected to the second delay circuit (3), the first delay circuit (2) provides an operation time, the second delay circuit (3) provides an energy release time, the MOS tube (4) is electrically connected to the second delay circuit (3), and the MOS tube (4) is electrically connected to the electric energy output terminal (5) and is used to output electric energy; The power module (1) comprises a battery pack VCC1, a constant current power supply VCC2, a control switch S1, an eighth capacitor C8 and a three-terminal voltage regulator U1, wherein the constant current power supply VCC2 and the eighth capacitor C8 are connected in series, the battery pack VCC1 is connected in parallel with the constant current power supply VCC2 and the eighth capacitor C8, the charge of the eighth capacitor C8 is 300-600uF, the voltage that the eighth capacitor C8 can carry is 8.1-13.5V, the negative electrode of the battery pack VCC1 is grounded, the voltage of the battery pack VCC1 is +12V, the positive electrode of the battery pack VCC1 is connected to the input end of the three-terminal voltage regulator U1, the control switch S1 is located between the battery pack VCC1 and the three-terminal voltage regulator U1, the ground end of the three-terminal voltage regulator U1 is grounded, and the output end of the three-terminal voltage regulator U1 is electrically connected to the fourth pin of the second timer TP2; the rated voltage of the MOS tube (4) is 40V, and the rated current of the MOS tube (4) is 557A.

2. The thermocouple spot welding device applicable to various types of pipelines as claimed in claim 1, characterized in that: The first delay circuit (2) comprises a first timer TP1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first photocoupler OC1, an NPN transistor V1, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a key switch S2; the second delay circuit (3) comprises a second timer TP2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a second photocoupler OC2, a fourth capacitor, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7.

3. The thermocouple spot welding device applicable to various types of pipelines as claimed in claim 2, characterized in that: The 8th pin of the first timer TP1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, one end of the third resistor R3 is electrically connected to the electrical connection node between the 8th connection end of the first timer TP1 and the output end of the three-terminal regulator U1, the other end of the third resistor R3 is electrically connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is electrically connected to the 7th pin of the first timer TP1, the 6th pin of the first timer TP1 is electrically connected to the electrical connection node between one end of the fourth resistor R4 and the 7th pin of the first timer TP1, the positive electrode of the third capacitor C3 is electrically connected to the electrical connection point between the fourth resistor R4 and the 7th pin of the first timer TP1, the negative electrode of the third capacitor C3 is electrically connected to one end of the first capacitor C1, and the first capacitor C 1, the other end of the key switch S2 is electrically connected to the 5th pin of the first timer TP1, the 4th pin of the first timer TP1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, the 1st pin of the first timer TP1 is electrically connected to one end of the first resistor R1, the 2nd pin of the first timer TP1 is electrically connected to the other end of the first resistor R1, the electrical connection point between the first resistor R1 and the 1st pin of the first timer TP1 is grounded, one end of the key switch S2 is electrically connected to the electrical connection point between the first resistor R1 and the 2nd pin of the first timer TP1, the other end of the key switch S2 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, and the 3rd pin of the first timer TP1 is electrically connected to one end of the second resistor R2.

4. The thermocouple spot welding device applicable to various types of pipelines as claimed in claim 2, characterized in that: The 8th pin of the second timer TP2 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, one end of the eighth resistor R8 is electrically connected to the electrical connection node between the 8th pin of the second timer TP2 and the output end of the three-terminal regulator U1, one end of the eighth resistor R8 is electrically connected to one end of the ninth resistor R9, the other end of the ninth resistor R9 is electrically connected to the 7th pin of the second timer TP2, the 6th pin of the second timer TP2 is electrically connected to the electrical connection node between one end of the ninth resistor R9 and the 7th pin of the second timer TP2, the positive electrode of the sixth capacitor C6 is electrically connected to the electrical connection node between one end of the ninth resistor R9 and the 6th pin of the second timer TP2, the negative electrode of the sixth capacitor C6 is electrically connected to one end of the seventh capacitor C7, the other end of the seventh capacitor C7 is electrically connected to the output end of the three-terminal regulator U1 and the second timer The electrical connection node between the fourth pin of the second timer TP2 and the fourth pin of the third timer TP2 is connected, one end of the fifth capacitor C5 is electrically connected to the fifth pin of the second timer TP2, the other end of the fifth capacitor C5 is electrically connected to the negative electrode of the sixth capacitor C6, the electrical connection point between the fifth capacitor C5 and the sixth capacitor C6 is grounded, the first pin of the second timer TP2 is electrically connected to one end of the sixth resistor R6, the other end of the sixth resistor R6 is electrically connected to the second pin of the second timer TP2, the electrical connection point between the sixth resistor R6 and the first pin of the second timer TP2 is grounded, one end of the fourth capacitor is electrically connected to the electrical connection point between the first pin of the second timer TP2 and the sixth resistor R6, the other end of the fourth capacitor is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the fourth pin of the second timer TP2, and the third pin of the second timer TP2 is electrically connected to one end of the seventh resistor R7.

5. The thermocouple spot welding device applicable to various types of pipelines as claimed in claim 2, characterized in that: The base of the NPN transistor V1 is electrically connected to the other end of the second resistor R2, the emitter of the NPN transistor V1 is grounded, the collector of the NPN transistor V1 is electrically connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is electrically connected to the electrical connection point between the battery pack VCC1 and the control switch S1, the positive electrode of the second capacitor C2 is electrically connected to the electrical connection point between the fifth resistor R5 and the collector of the NPN transistor V1, the negative electrode of the second capacitor C2 is electrically connected to the anode of the first photocoupler OC1, the cathode of the first photocoupler OC1 is electrically connected to the electrical connection point between the first capacitor C1 and the third capacitor C3, the collector of the first photocoupler OC1 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the 4th pin of the second timer TP2, and the emitter of the first photocoupler OC1 is electrically connected to the electrical connection point between the sixth resistor R6 and the 2nd pin of the second timer TP2.

6. The thermocouple spot welding device applicable to various types of pipelines as claimed in claim 2, characterized in that: The other end of the seventh resistor R7 is electrically connected to the anode of the second photoelectric coupler OC2, the cathode of the second photoelectric coupler OC2 is electrically connected to one end of the tenth resistor R10, the electrical connection point between the second photoelectric coupler OC2 and one end of the tenth resistor R10 is grounded, the collector of the second photoelectric coupler OC2 is electrically connected to one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is electrically connected to the electrical connection point between the output end of the three-terminal regulator U1 and the fourth pin of the second timer TP2, the emitter of the second photoelectric coupler OC2 is electrically connected to the other end of the tenth resistor R10, and the MOS tube (4) is electrically connected to the electrical connection point between the emitter of the second photoelectric coupler OC2 and the tenth resistor R10.

7. The thermocouple spot welding device applicable to various types of pipelines as claimed in claim 2, characterized in that: The first timer TP1 and the second timer TP2 are both 555 timers, the first photocoupler OC1 and the second photocoupler OC2 are both PC817, and the third resistor R3 and the eighth resistor R8 are both sliding resistors.

8. The thermocouple spot welding device applicable to various types of pipelines as claimed in claim 1, characterized in that: The model of the MOS tube (4) is IRL40SC228.

9. The thermocouple spot welding device applicable to various types of pipelines as claimed in claim 1, characterized in that: The three-terminal regulator U1 is model 7812.

Images