Electric welding machine cooling system and control method

Abstract

The application provides an electric welding machine cooling system and a control method, the electric welding machine cooling system comprising a cooling pipeline, an electric welding machine welding gun, a cooling device, a storage tank, a circulating pump and a control module; the electric welding machine welding gun is arranged on the cooling pipeline and can exchange heat with the cooling medium in the cooling pipeline; the cooling device can cool the cooling medium flowing through the cooling pipeline; the storage tank is used for storing the cooling medium, and the inside of the storage tank is communicated with the cooling pipeline; the circulating pump can extract the cooling medium in the storage tank and transport the cooling medium from the inlet end of the cooling pipeline into the cooling pipeline; the control module connected with the circulating pump can obtain the current working lift of the circulating pump, and adjust the rotating speed according to the comparison result of the working lift and the preset lift. The application provides an electric welding machine cooling system and a control method, which can realize the lift control of the circulating pump, thereby reducing the influence of the overlarge or over-small lift of the circulating pump on the electric welding machine welding gun when the height of the electric welding machine welding gun is changed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a welding machine cooling system and a control method. BACKGROUND

[0002] In the related art, the winding and the core inside the welding machine generate a large amount of heat when the welding machine is working, so the welding machine cooling system matched with the welding machine is needed to transfer the heat inside the welding machine. The welding machine cooling system usually uses liquid cooling to dissipate heat inside the welding machine. The cooling medium in the storage tank is pumped into the cooling pipeline by the circulating pump. The cooling medium in the cooling pipeline enters the welding machine to absorb heat and then is cooled by the cooling device. Finally, it flows back to the storage tank, so that it can be pumped into the cooling pipeline again by the circulating pump. When the welding gun of the welding machine is used for welding work at different heights, the height difference between the welding gun of the welding machine and the storage tank changes. When the height of the welding gun of the welding machine rises, the head of the circulating pump is not enough to send the cooling medium in the storage tank to the welding machine. The cooling medium in the storage tank cannot cool the welding gun of the welding machine, and the welding gun of the welding machine will be overheated and damaged. When the head of the circulating pump is enough to send the cooling medium in the storage tank to the welding machine, if the height of the welding gun of the welding machine decreases, the cooling effect of the cooling medium on the welding gun of the welding machine is too strong due to the excessive flow of the circulating pump, thereby causing the welding effect of the welding gun of the welding machine to be poor. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a welding machine cooling system, which can control the head of the circulating pump, thereby reducing the influence of the excessive or insufficient head of the circulating pump on the welding gun of the welding machine when the height of the welding gun of the welding machine changes.

[0004] The present application also proposes a welding machine cooling control method using the above welding machine cooling system.

[0005] The welding machine cooling system according to the first aspect embodiment of the present application cools by using a cooling medium, comprising:

[0006] a cooling pipeline;

[0007] a welding gun of a welding machine, which is arranged in the cooling pipeline and can exchange heat with the cooling medium in the cooling pipeline;

[0008] a cooling device, which is arranged in the cooling pipeline and can cool the cooling medium flowing through the cooling pipeline;

[0009] a storage tank for storing the cooling medium, the inlet end and the outlet end of the cooling pipeline are in communication with the inside of the storage tank;

[0010] A circulating pump is capable of extracting the cooling medium in the storage tank and delivering it into the cooling pipeline from the inlet end of the cooling pipeline;

[0011] A control module is signal connected to the circulating pump, and is capable of obtaining the current working head H1 of the circulating pump;

[0012] The control module is configured to reduce the rotating speed of the circulating pump when the working head H1 is higher than a preset head H2, and increase the rotating speed of the circulating pump when the working head H1 is lower than the preset head H2.

[0013] The electric welding machine cooling system according to the embodiment of the present application has at least the following beneficial effects: the circulating pump delivers the cooling medium in the storage tank into the cooling pipeline from the inlet end of the cooling pipeline, so that the cooling medium can exchange heat with the electric welding machine welding gun arranged in the cooling pipeline, thereby cooling the electric welding machine welding gun; the cooling medium can also release the heat absorbed after exchanging heat with the electric welding machine welding gun at the cooling device, and return to the storage tank through the outlet end of the cooling pipeline, so as to be delivered into the cooling pipeline by the circulating pump for the next round of cooling. The control module can adjust the working head of the circulating pump according to the preset head and the working head: when the working head is higher than the preset head, the control module reduces the rotating speed of the circulating pump, thereby reducing the working head of the circulating pump and reducing the cooling effect of the cooling medium on the electric welding machine welding gun, so as to ensure the welding effect of the electric welding machine welding gun when the height of the electric welding machine welding gun is reduced; when the working head is lower than the preset head, the control module increases the rotating speed of the circulating pump, thereby increasing the working head of the circulating pump, so that the cooling medium can be delivered to a higher place, thereby enabling the electric welding machine welding gun to be cooled by the cooling medium when the height of the electric welding machine welding gun is increased.

[0014] The electric welding machine cooling system according to the second aspect of the present application is cooled by a cooling medium, comprising:

[0015] A cooling pipeline;

[0016] An electric welding machine welding gun arranged in the cooling pipeline and capable of exchanging heat with the cooling medium in the cooling pipeline;

[0017] A cooling device arranged in the cooling pipeline and capable of cooling the cooling medium flowing through the cooling pipeline;

[0018] A storage tank for storing the cooling medium, the inlet end and the outlet end of the cooling pipeline are both in communication with the inside of the storage tank;

[0019] A circulating pump capable of extracting the cooling medium in the storage tank and delivering it into the cooling pipeline from the inlet end of the cooling pipeline;

[0020] A first temperature sensor;

[0021] A control module is connected to the circulating pump, and the control module can obtain the current working head H1 of the circulating pump and the actual temperature T1 of the cooling medium in the cooling pipeline through the first temperature sensor;

[0022] The control module is configured to increase the rotating speed of the circulating pump when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is higher than the preset head H2, or when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is lower than the preset head H2; and decrease the rotating speed of the circulating pump when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is lower than the preset head H2, or when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is higher than the preset head H2.

[0023] The welding machine cooling system has at least the following beneficial effects: the circulating pump delivers the cooling medium in the storage tank to the cooling pipeline from the inlet end of the cooling pipeline, so that the cooling medium can exchange heat with the welding machine gun arranged in the cooling pipeline, thereby cooling the welding machine gun; the cooling medium can also release the heat absorbed after heat exchange with the welding machine gun at the cooling device and return to the storage tank through the outlet end of the cooling pipeline, so as to be delivered to the cooling pipeline by the circulating pump for the next round of cooling.

[0024] The control module can adjust the working head of the circulating pump according to the preset head, the working head, the preset temperature and the actual temperature: when the working head is higher than the preset head and the actual temperature is lower than the preset temperature, the control module decreases the rotating speed of the circulating pump, thereby decreasing the working head of the circulating pump and reducing the cooling effect of the cooling medium on the welding machine gun, so as to ensure the welding effect of the welding machine gun when the height of the welding machine gun decreases, and at the same time, the actual temperature approaches the preset temperature, so that the cooling intensity on the welding machine gun is closer to the cooling intensity that the welding machine should bear at the preset temperature; when the working head is lower than the preset head, the control module increases the rotating speed of the circulating pump, thereby increasing the working head of the circulating pump, so that the cooling medium can be delivered to a higher place, thereby enabling the welding machine gun to be cooled by the cooling medium when the height of the welding machine gun increases, and at the same time, the actual temperature approaches the preset temperature, so that the cooling intensity on the welding machine gun is closer to the cooling intensity that the welding machine should bear at the preset temperature.

[0025] When the working head is higher than the preset head and the actual temperature is higher than the preset temperature, the control module increases the rotating speed of the circulating pump, so that the working head of the circulating pump continues to rise, the cooling effect of the cooling medium on the welding gun of the electric welding machine is continuously enhanced, and the cooling intensity on the welding gun of the electric welding machine is closer to the cooling intensity that the welding gun of the electric welding machine should bear at the preset temperature; when the working head is lower than the preset head and the actual temperature is lower than the preset temperature, the control module reduces the rotating speed of the circulating pump, so that the working head of the circulating pump continues to drop, the cooling effect of the cooling medium on the welding gun of the electric welding machine is continuously weakened, and the cooling intensity on the welding gun of the electric welding machine is closer to the cooling intensity that the welding gun of the electric welding machine should bear at the preset temperature. The above scheme adjusts the working head of the circulating pump according to the preset head, the working head, the preset temperature and the actual temperature, and can control the welding performance of the welding gun of the electric welding machine.

[0026] According to some embodiments of the present application, the cooling medium is made of a gas-liquid phase change material, and the cooling medium becomes gaseous after flowing through the welding gun of the electric welding machine and becomes liquid after flowing through the cooling device.

[0027] According to some embodiments of the present application, the electric welding machine cooling system further comprises a second temperature sensor and a throttling device, the second temperature sensor is signal connected to the control module, and the throttling device is arranged in the cooling pipeline and is used for setting the opening of the circulating pump; the control module can further obtain the actual superheat K1 of the gaseous cooling medium in the cooling pipeline through the second temperature sensor.

[0028] The control module is configured to, when the actual superheat K1 is higher than a preset superheat K2, control the throttling device to increase the opening of the circulating pump; and when the actual superheat K1 is lower than the preset superheat K2, control the throttling device to reduce the opening of the circulating pump.

[0029] According to some embodiments of the present application, the electric welding machine cooling system comprises a humidity sensor and a gas pressure sensor, the control module can obtain the dew point temperature T4 of the outside through the humidity sensor, and can obtain the gas pressure of the gaseous cooling medium through the gas pressure sensor to obtain the saturation temperature T5 of the cooling medium under the current pressure; the control module is configured to, when the dew point temperature T4 is higher than the saturation temperature T5, increase the rotating speed of the circulating pump until the saturation temperature T5 is higher than the dew point temperature T4.

[0030] According to some embodiments of the present application, the electric welding machine cooling system further comprises a first temperature sensor, the control module is signal connected to the first temperature sensor and can obtain the actual temperature T1 of the cooling medium in the cooling pipeline through the first temperature sensor; the control module is configured to increase the rotating speed of the circulating pump to the upper limit, increase the opening of the circulating pump to the upper limit, and increase the power of the cooling device to the upper limit when the actual temperature T1 is higher than the warning temperature T3.

[0031] The electric welding machine cooling system according to the third aspect of the embodiments of the present application is executed by the electric welding machine cooling system according to any one of the above-mentioned embodiments, and comprises the following steps:

[0032] Setting a preset head H2;

[0033] Obtaining the current working head H1 of the circulating pump;

[0034] Comparing the working head H1 with the preset head H2;

[0035] Adjusting the rotating speed of the circulating pump according to the comparison result: decreasing the rotating speed of the circulating pump when the working head H1 is higher than the preset head H2, or increasing the rotating speed of the circulating pump when the working head H1 is lower than the preset head H2, so that the working head H1 is equal to the preset head H2.

[0036] The electric welding machine cooling system according to the embodiments of the present application has at least the following beneficial effects: when the working head is higher than the preset head, decreasing the rotating speed of the circulating pump can decrease the working head of the circulating pump, reduce the cooling effect of the cooling medium on the electric welding machine welding gun, and thus ensure the welding effect of the electric welding machine welding gun when the height of the electric welding machine welding gun is decreased; when the working head is lower than the preset head, increasing the rotating speed of the circulating pump can increase the working head of the circulating pump, so that the cooling medium can be delivered to a higher place, and thus the electric welding machine welding gun can also be cooled by the cooling medium when the height of the electric welding machine welding gun is increased.

[0037] According to some embodiments of the present application, the electric welding machine cooling system is cooled by a cooling medium, and the cooling medium is a gas-liquid phase change material; the electric welding machine cooling control method further comprises the following steps:

[0038] Setting a preset superheat K2;

[0039] Obtaining the actual superheat K1 of the cooling medium in the cooling pipeline in a gaseous state;

[0040] After the working head H1 is equal to the preset head H2, the opening of the circulating pump is adjusted to make the actual superheat K1 equal to the preset superheat K2.

[0041] According to some embodiments of the present application, when the preset lift H2 is set, a lift adjustment upper limit H3 and a lift adjustment lower limit H4 are set, the lift adjustment upper limit H3 is greater than the lift adjustment lower limit H4, and the preset lift H2 is greater than the lift adjustment lower limit H4 and less than the lift adjustment upper limit H3;

[0042] In the process of adjusting the rotating speed of the circulating pump according to the comparison result, and after the working lift H1 is greater than the lift adjustment lower limit H4 and less than the lift adjustment upper limit H3, the opening of the circulating pump is increased synchronously with the increase of the rotating speed of the circulating pump, and the opening of the circulating pump is decreased synchronously with the decrease of the rotating speed of the circulating pump.

[0043] According to some embodiments of the present application, when the preset overheat degree K2 is set, an overheat degree adjustment upper limit K3 and an overheat degree adjustment lower limit K4 are set, the overheat degree adjustment upper limit K3 is greater than the overheat degree adjustment lower limit K4, and the preset overheat degree K2 is greater than the overheat degree adjustment lower limit K4 and less than the overheat degree adjustment upper limit K3;

[0044] In the process of adjusting the opening of the circulating pump to make the actual overheat degree K1 equal to the preset overheat degree K2, the rotating speed and the opening of the circulating pump are adjusted until the preset overheat degree K2 is greater than the overheat degree adjustment lower limit K4 and less than the overheat degree adjustment upper limit K3, and then the opening of the circulating pump is adjusted to make the actual overheat degree K1 equal to the preset overheat degree K2.

[0045] According to some embodiments of the present application, when the preset overheat degree K2 is set, an overheat degree adjustment upper limit K3 and an overheat degree adjustment lower limit K4 are set, the overheat degree adjustment upper limit K3 is greater than the overheat degree adjustment lower limit K4, and the preset overheat degree K2 is greater than the overheat degree adjustment lower limit K4 and less than the overheat degree adjustment upper limit K3;

[0046] In the process of adjusting the rotating speed of the circulating pump according to the comparison result, when the preset overheat degree K2 is greater than the overheat degree adjustment lower limit K4 and less than the overheat degree adjustment upper limit K3, the adjustment period of the opening of the circulating pump is longer than the adjustment period of the rotating speed of the circulating pump.

[0047] Additional aspects and advantages of the present application will be made apparent from the following description, which proceeds with reference to the accompanying drawings and exemplary embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0048] The present application will be further described with reference to the drawings and embodiments, wherein:

[0049] Figure 1 It is a connection diagram of the cooling system of the electric welding machine according to some embodiments of the first aspect of the present application;

[0050] Figure 2 Connection diagram of the welding machine cooling system for some embodiments of the second aspect of the present application;

[0051] Figure 3 Connection diagram of the welding machine cooling system for some embodiments of the third aspect of the present application;

[0052] Figure 4 Control flow chart of the welding machine cooling system for some embodiments of the present application.

[0053] Reference signs:

[0054] Cooling pipeline 100, inlet end 110, outlet end 120, welding torch inlet 210, welding torch outlet 220, cooling device 300, storage tank 400, circulating pump 500, control module 600, pump inlet pressure sensor 610, pump outlet pressure sensor 620, first temperature sensor 700, second temperature sensor 800, throttling device 900, humidity sensor 1000, gas pressure sensor 1100. DETAILED DESCRIPTION

[0055] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which examples of the embodiments are shown, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0056] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application. The device or element indicated is not necessarily constructed and operated in a particular orientation.

[0057] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. is not included in the number, and above, below, etc. is included in the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0058] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0059] In the description of the application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In this specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0060] Please refer to Figure 1 shown, wherein Figure 1 The electric welding machine is not shown, and only the welding gun access port 210 and the welding gun exit port 220 connected to the internal passage of the electric welding machine are shown, and the application discloses an electric welding machine cooling system using cooling medium cooling, which comprises a cooling pipeline 100, an electric welding machine welding gun, a cooling device 300, a storage tank 400, a circulating pump 500 and a control module 600; the electric welding machine welding gun is arranged in the cooling pipeline 100 and can exchange heat with the cooling medium in the cooling pipeline 100; the cooling device 300 is arranged in the cooling pipeline 100 and can cool the cooling medium flowing through the cooling pipeline 100; the storage tank 400 is used for storing the cooling medium, and the inlet end 110 and the outlet end 120 of the cooling pipeline 100 are both communicated with the inside of the storage tank 400; the circulating pump 500 can extract the cooling medium in the storage tank 400 and transport it from the inlet end 110 of the cooling pipeline 100 into the cooling pipeline 100.

[0061] The circulating pump 500 transports the cooling medium in the storage tank 400 from the inlet end 110 of the cooling pipeline 100 into the cooling pipeline 100, so that the cooling medium can exchange heat with the electric welding machine arranged in the cooling pipeline 100, thereby cooling the electric welding machine; the cooling medium can also release the heat absorbed after exchanging heat with the electric welding machine at the cooling device 300 and return to the storage tank 400 through the outlet end 120 of the cooling pipeline 100, so as to be transported into the cooling pipeline 100 by the circulating pump 500 for the next round of cooling. The electric welding machine cooling system enables the cooling medium to circulate in the cooling pipeline 100 and continuously cool the electric welding machine in the above-mentioned manner.

[0062] The control module 600 is signal connected to the circulating pump 500, and the control module 600 can obtain the current working head H1 of the circulating pump 500. The control module 600 is configured to reduce the rotating speed of the circulating pump 500 when the working head H1 is higher than the preset head H2, and increase the rotating speed of the circulating pump 500 when the working head H1 is lower than the preset head H2.

[0063] The control module 600 configured according to the above scheme can adjust the working head H1 of the circulating pump 500 according to the preset head H2 and the working head H1.

[0064] When the working head H1 is higher than the preset head H2, the control module 600 reduces the rotating speed of the circulating pump 500, and then the working head H1 of the circulating pump 500 is lowered, the cooling effect of the cooling medium on the welding gun of the electric welding machine is reduced, and thus the welding effect of the welding gun of the electric welding machine is ensured when the height of the welding gun of the electric welding machine is lowered.

[0065] When the working head H1 is lower than the preset head H2, the control module 600 increases the rotating speed of the circulating pump 500, and then the working head H1 of the circulating pump 500 is raised, and the cooling medium can be delivered to a higher place, so that the welding gun of the electric welding machine can also be cooled by the cooling medium when the height of the welding gun of the electric welding machine is raised.

[0066] The above scheme adjusts the working head H1 of the circulating pump 500 according to the preset head H2 and the working head H1, and can reduce the influence of the overlarge or over-small head of the circulating pump 500 on the welding gun of the electric welding machine when the height of the welding gun of the electric welding machine is changed.

[0067] Please refer to Figure 2 As shown in the figure, wherein Figure 2 The electric welding machine is not shown, and only the welding gun access port 210 and the welding gun exit port 220 connected to the internal passage of the electric welding machine are shown, and the application further discloses an electric welding machine cooling system using cooling medium, which comprises a cooling pipeline 100, an electric welding machine welding gun, a cooling device 300, a storage tank 400, a circulating pump 500, a first temperature sensor 700 and a control module 600; the electric welding machine welding gun is arranged in the cooling pipeline 100 and can exchange heat with the cooling medium in the cooling pipeline 100; the cooling device 300 is arranged in the cooling pipeline 100 and can cool the cooling medium flowing through the cooling pipeline 100; the storage tank 400 is used for storing the cooling medium, and the inlet end 110 and the outlet end 120 of the cooling pipeline 100 are both connected to the inside of the storage tank 400; the circulating pump 500 can extract the cooling medium in the storage tank 400 and deliver it into the cooling pipeline 100 from the inlet end 110 of the cooling pipeline 100.

[0068] The circulating pump 500 delivers the cooling medium in the storage tank 400 into the cooling pipeline 100 from the inlet end 110 of the cooling pipeline 100, so that the cooling medium can exchange heat with the electric welder arranged in the cooling pipeline 100, thereby cooling the electric welder; the cooling medium can also release the heat absorbed after exchanging heat with the electric welder at the cooling device 300 and return to the storage tank 400 through the outlet end 120 of the cooling pipeline 100, thereby being delivered into the cooling pipeline 100 by the circulating pump 500 for the next round of cooling. The electric welder cooling system enables the cooling medium to circulate in the cooling pipeline 100 and continuously cool the electric welder in the above-mentioned manner.

[0069] The control module 600 is signal-connected to the circulating pump 500 and the first temperature sensor 700 and can obtain the current working head H1 of the circulating pump 500 and the actual temperature T1 of the cooling medium in the cooling pipeline 100 through the first temperature sensor 700. The control module 600 is configured to increase the rotating speed of the circulating pump 500 when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is higher than the preset head H2; and decrease the rotating speed of the circulating pump 500 when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is lower than the preset head H2.

[0070] The control module 600 configured in the above-mentioned scheme can adjust the working head H1 of the circulating pump 500 according to the preset head H2, the working head H1, the preset temperature T2 and the actual temperature T1.

[0071] When the working head H1 is higher than the preset head H2 and the actual temperature T1 is lower than the preset temperature T2, the control module 600 decreases the rotating speed of the circulating pump 500, thereby decreasing the working head H1 of the circulating pump 500 and reducing the cooling effect of the cooling medium on the electric welder gun, so as to ensure the welding effect of the electric welder gun when the height of the electric welder gun is lowered, and meanwhile, the actual temperature T1 approaches the preset temperature T2, so that the cooling intensity on the electric welder gun is closer to the cooling intensity that the electric welder should bear at the preset temperature T2.

[0072] When the working head H1 is lower than the preset head H2 and the actual temperature T1 is higher than the preset temperature T2, the control module 600 increases the rotating speed of the circulating pump 500, thereby increasing the working head H1 of the circulating pump 500, so that the cooling medium can be delivered to a higher position, thereby enabling the electric welder gun to be cooled by the cooling medium when the height of the electric welder gun is increased, and meanwhile, the actual temperature T1 approaches the preset temperature T2, so that the cooling intensity on the electric welder gun is closer to the cooling intensity that the electric welder should bear at the preset temperature T2.

[0073] When the working head H1 is higher than the preset head H2 and the actual temperature T1 is higher than the preset temperature T2, the control module 600 increases the rotating speed of the circulating pump 500, so that the working head H1 of the circulating pump 500 continues to rise, the cooling effect of the cooling medium on the welding gun of the electric welding machine is continuously enhanced, and the cooling intensity received by the welding gun of the electric welding machine is closer to the cooling intensity that the electric welding machine should receive at the preset temperature T2.

[0074] When the working head H1 is lower than the preset head H2 and the actual temperature T1 is lower than the preset temperature T2, the control module 600 reduces the rotating speed of the circulating pump 500, so that the working head H1 of the circulating pump 500 continues to drop, the cooling effect of the cooling medium on the welding gun of the electric welding machine is continuously weakened, and the cooling intensity received by the welding gun of the electric welding machine is closer to the cooling intensity that the electric welding machine should receive at the preset temperature T2.

[0075] The above scheme adjusts the working head H1 of the circulating pump 500 according to the preset head H2, the working head H1, the preset temperature T2 and the actual temperature T1, which can reduce the influence of the overlarge or over-small head of the circulating pump 500 on the electric welding machine when the height of the electric welding machine changes, and can control the welding performance of the electric welding machine as much as possible.

[0076] For the specific scheme of adjusting the rotating speed of the circulating pump 500 by the control module 600, as a preferred embodiment, the control module 600 can calculate the deviation percentage of the preset temperature T2 and the actual temperature T1, and can calculate the deviation percentage of the preset head H2 and the working head H1; the control module 600 is configured to, when the working head H1 is higher than the preset head H2 and the actual temperature T1 is lower than the preset temperature T2, reduce the rotating speed of the circulating pump 500 by taking the one with the greater deviation percentage of temperature and head as the adjustment reference; when the working head H1 is lower than the preset head H2 and the actual temperature T1 is higher than the preset temperature T2, increase the rotating speed of the circulating pump 500 by taking the one with the greater deviation percentage of temperature and head as the adjustment reference.

[0077] When the control module 600 adjusts the actual temperature T1, the prior art takes the deviation percentage of the actual temperature T1 and the preset temperature T2 as the adjustment reference to increase or reduce the rotating speed of the circulating pump 500, and when the actual temperature T1 gradually approaches the preset temperature T2, the control module 600 gradually reduces the speed of the actual temperature T1 approaching the preset temperature T2, so as to reduce the actual error between the actual temperature T1 and the preset temperature T2 in the stable electric welding machine cooling system.

[0078] In the above embodiments, the one with the greater deviation percentage of temperature and head is taken as the adjustment reference to increase the rotating speed of the circulating pump 500, and when the control module 600 adjusts the actual temperature T1, if the deviation percentage of head is greater, the speed at which the actual temperature T1 approaches the preset temperature T2 will also be reduced more slowly, and thus the actual temperature T1 approaches the preset temperature T2 more quickly, and the electric welding machine cooling system can respond more quickly after the new preset temperature T2 is input by the worker.

[0079] It should be noted that the present application does not limit the specific way in which the control module 600 obtains the working head H1 of the circulating pump 500. As some examples of specific ways, please refer to Figure 2 As shown in FIG. 6, in some embodiments, the control module 600 includes a pump inlet pressure sensor 610 and a pump outlet pressure sensor 620, the pump inlet pressure sensor 610 is arranged upstream of the circulating pump 500 in the cooling pipeline 100, and the pump outlet pressure sensor 620 is arranged downstream of the circulating pump 500 in the cooling pipeline 100; the control module 600 can obtain the working head H1 of the circulating pump 500 through the detection results of the pump inlet pressure sensor 610 and the pump outlet pressure sensor 620. Specifically, the control module 600 obtains the pressure value at the position where the pump inlet pressure sensor 610 is arranged through the pump inlet pressure sensor 610, and obtains the pressure value at the position where the pump outlet pressure sensor 620 is arranged through the pump outlet pressure sensor 620, and the control module 600 takes the difference between the two pressure values as the working head H1 of the circulating pump 500.

[0080] As a preferred scheme for obtaining the working head H1, please refer to Figure 2 As shown in FIG. 7, in some embodiments, the control module 600 includes a pump inlet pressure sensor 610 and a pump outlet pressure sensor 620, the pump inlet pressure sensor 610 is arranged upstream of the circulating pump 500 in the cooling pipeline 100, and the pump outlet pressure sensor 620 is arranged downstream of the circulating pump 500 in the cooling pipeline 100; the control module 600 can obtain the working head H1 of the circulating pump 500 through the detection results of the pump inlet pressure sensor 610 and the pump outlet pressure sensor 620. Specifically, the control module 600 obtains the pressure value at the position where the pump inlet pressure sensor 610 is arranged through the pump inlet pressure sensor 610, and obtains the pressure value at the position where the pump outlet pressure sensor 620 is arranged through the pump outlet pressure sensor 620, and the control module 600 takes the difference between the two pressure values as the working head H1 of the circulating pump 500. Figure 1 The circulating pump 500 inlet and the circulating pump 500 outlet are not shown; in some embodiments, the circulating pump 500 has a circulating pump 500 inlet and a circulating pump 500 outlet, and the cooling medium in the storage tank 400 drawn by the circulating pump 500 passes through the circulating pump 500 inlet and the circulating pump 500 outlet in sequence; the control module 600 includes a pump inlet pressure sensor 610 and a pump outlet pressure sensor 620, and the control module 600 obtains the working head H1 according to the detection results of the pump inlet pressure sensor 610 and the pump outlet pressure sensor 620, the pump inlet pressure sensor 610 is arranged at the circulating pump 500 inlet, and the pump outlet pressure sensor 620 is arranged at the circulating pump 500 outlet. Arranging the pump inlet pressure sensor 610 at the circulating pump 500 inlet and the pump outlet pressure sensor 620 at the circulating pump 500 outlet can reduce the kinetic energy lost due to the friction between the cooling medium and the cooling pipeline 100 when the cooling medium flows in the cooling pipeline 100, so that the working head H1 obtained by the control module 600 is closer to the working head H1, and the measurement error of the working head H1 is reduced.

[0081] On the basis of the above various embodiments, the following further introduces the corresponding improvement scheme.

[0082] Further, in some embodiments, the cooling medium is made of a gas-liquid phase change material, which becomes gaseous after flowing through the welding gun of the electric welding machine and becomes liquid after flowing through the cooling device 300. Through the above scheme, the electric welding machine cooling system can absorb more heat of the internal structure of the electric welding machine by using the gasification process of the cooling liquid, and can also release more heat at the cooling device 300 by using the liquefaction process of the gas to be cooled; the temperature change range of the gas-liquid phase change material in the gasification and liquefaction processes is small, so it can further maintain the temperature difference between the internal structure of the electric welding machine and the internal structure of the welding gun when absorbing heat, and maintain the temperature difference between the heat exchange structure of the cooling device 300 when releasing heat, further guaranteeing the stability of heat exchange.

[0083] Further, please refer to Figure 3 As shown in the figure, Figure 3 The electric welding machine is not shown, only the welding gun access port 210 and the welding gun exit port 220 connected to the internal passage of the electric welding machine are shown, in some embodiments, the electric welding machine cooling system further includes a second temperature sensor 800 and a throttling device 900, the second temperature sensor 800 is signal connected to the control module 600, and the throttling device 900 is arranged in the cooling pipeline 100 and is used to set the opening of the circulating pump 500; the control module 600 can also obtain the preset superheat K2 of the gaseous cooling medium in the cooling pipeline 100 through the second temperature sensor 800; the control module 600 is configured to, when the preset superheat K2 is higher than the preset superheat K2, control the throttling device 900 to increase the opening of the circulating pump 500; when the preset superheat K2 is lower than the preset superheat K2, control the throttling device 900 to reduce the opening of the circulating pump 500.

[0084] Controlling the preset superheat K2 to remain the preset superheat K2 is beneficial to the electric welding machine cooling system to remain stable; and since the cooling medium is made of a phase change material, the electric welding machine cooling system mainly uses the phase change process of the phase change material to cool the welding gun of the electric welding machine. Adjusting the rotating speed of the circulating pump 500 easily causes a large change in the flow of the cooling medium, and the actual superheat K1 is prone to fluctuation, so it is difficult to achieve the preset superheat K2; and adjusting the opening of the circulating pump 500 more accurately adjusts the flow of the cooling medium flowing through the welding gun of the electric welding machine, so that the actual superheat K1 is also more easily adjusted.

[0085] Further, please refer to Figure 3As shown, in some embodiments, the electric welding machine cooling system comprises a humidity sensor 1000 and a gas pressure sensor 1100, the control module 600 is capable of acquiring the outside dew point temperature T4 through the humidity sensor 1000, and is capable of acquiring the gas pressure of the gaseous cooling medium through the gas pressure sensor 1100 to acquire the saturation temperature T5 of the cooling medium under the current pressure; the control module 600 is configured to increase the rotating speed of the circulating pump 500 until the saturation temperature T5 is higher than the dew point temperature T4 when the dew point temperature T4 is higher than the saturation temperature T5. Through the above scheme, increasing the rotating speed can increase the pressure in the cooling pipeline 100, and then increase the saturation temperature T5 of the cooling medium, so that the ambient temperature near the electric welding machine welding gun is increased, and the water vapor in the outside environment cannot form dew drops on the surface of the electric welding machine welding gun, thereby avoiding affecting the normal use of the electric welding machine welding gun.

[0086] Further, the control module 600 is configured to, when the actual temperature T1 is higher than the warning temperature T3, increase the rotating speed of the circulating pump 500 to the upper limit, increase the opening degree of the circulating pump 500 to the upper limit, and increase the power of the cooling device 300 to the upper limit. Through the above scheme, the circulating pump 500 and the cooling device 300 can operate to the maximum extent, so that the cooling function of the electric welding machine cooling system reaches the highest, thereby maximizing the cooling of the electric welding machine welding gun to avoid overheating of the electric welding machine welding gun. The warning temperature T3 can be adjusted by those skilled in the art according to the actual application scene in the electric welding machine cooling system.

[0087] Please refer to Figures 1-4 As shown, the present application also discloses an electric welding machine cooling control method implemented by any of the above embodiments, comprising the following steps:

[0088] Setting a preset head H2;

[0089] Acquiring the current working head H1 of the circulating pump 500;

[0090] Comparing the working head H1 and the preset head H2;

[0091] Adjusting the rotating speed of the circulating pump 500 according to the comparison result: reducing the rotating speed of the circulating pump 500 when the working head H1 is higher than the preset head H2, or increasing the rotating speed of the circulating pump 500 when the working head H1 is lower than the preset head H2, so that the working head H1 is equal to the preset head H2.

[0092] When the working head H1 is higher than the preset head H2, reducing the rotating speed of the circulating pump 500 can lower the working head H1 of the circulating pump 500, reduce the cooling effect of the cooling medium on the welding gun of the electric welding machine, and thus ensure the welding effect of the welding gun of the electric welding machine when the height of the welding gun of the electric welding machine is lowered; when the working head H1 is lower than the preset head H2, increasing the rotating speed of the circulating pump 500 can raise the working head H1 of the circulating pump 500, so that the cooling medium can be delivered to a higher place, and thus the welding gun of the electric welding machine can also be cooled by the cooling medium when the height of the welding gun of the electric welding machine is raised.

[0093] Further, referring to Fig. 1, Figure 4 In some embodiments, when the electric welding machine cooling system cools by using the cooling medium, and the cooling medium is a gas-liquid phase change material, the electric welding machine cooling control method further comprises the following steps:

[0094] Setting a preset superheat K2;

[0095] Obtaining the preset superheat K2 of the gaseous cooling medium in the cooling pipeline 100;

[0096] After the working head H1 is equal to the preset head H2, adjusting the opening of the circulating pump 500 to make the preset superheat K2 equal to the preset superheat K2.

[0097] Controlling the preset superheat K2 to remain the preset superheat K2 is conducive to keeping the electric welding machine cooling system stable; and since the cooling medium is made of a gas-liquid phase change material, the electric welding machine cooling system mainly cools the welding gun of the electric welding machine by using the phase change process of the phase change material.

[0098] Adjusting the rotating speed of the circulating pump 500 can easily cause a large change in the flow of the cooling medium, and the actual superheat K1 can easily fluctuate, thus making it difficult to reach the preset superheat K2, and causing a large deviation between the working head H1 and the preset head H2; and adjusting the opening of the circulating pump 500 after adjusting the working head H1 of the circulating pump 500 can more accurately adjust the flow of the cooling medium flowing through the welding gun of the electric welding machine, so that the actual superheat K1 is also more easily adjusted, and the deviation between the working head H1 and the preset head H2 is reduced. On the other hand, after the actual superheat K1 and the preset superheat K2 are equal, the actual temperature T1 of the electric welding machine cooling system and the preset temperature T2 can also be the same.

[0099] Further, referring to Fig. 1, Figure 4As shown, in some embodiments, when the preset head H2 is set, the upper limit H3 and the lower limit H4 of the head adjustment are set, the upper limit H3 of the head adjustment is greater than the lower limit H4 of the head adjustment, the preset head H2 is greater than the lower limit H4 of the head adjustment and less than the upper limit H3 of the head adjustment; in the process of adjusting the rotating speed of the circulating pump 500 according to the comparison result, and after the working head H1 of the circulating pump 500 is greater than the lower limit H4 of the head adjustment and less than the upper limit H3 of the head adjustment, the opening of the circulating pump 500 is increased synchronously with the increase of the rotating speed of the circulating pump 500, and the opening of the circulating pump 500 is decreased synchronously with the decrease of the rotating speed of the circulating pump 500.

[0100] Changing the opening of the circulating pump 500 can affect the working head H1 of the circulating pump 500, specifically, increasing the opening of the circulating pump 500 can increase the working head H1 of the circulating pump 500, and decreasing the opening of the circulating pump 500 can decrease the working head H1 of the circulating pump 500. Increasing the opening of the circulating pump 500 synchronously with the increase of the rotating speed of the circulating pump 500 and decreasing the opening of the circulating pump 500 synchronously with the decrease of the rotating speed of the circulating pump 500 are both conducive to further accelerating the adjustment of the working head H1.

[0101] However, due to the upper and lower limits of the opening adjustment of the circulating pump 500 in the actual working condition, and the small influence of the adjustment of the opening on the head of the circulating pump 500, the opening of the circulating pump 500 is prone to reach the upper limit or the lower limit in the process of adjusting the working head H1, and then the opening of the circulating pump 500 cannot be further increased or decreased in the subsequent adjustment process of the overheating degree, resulting in that the actual overheating degree K1 cannot be further adjusted. In view of the above situation, the above embodiment sets the upper limit H3 and the lower limit H4 of the head adjustment according to the preset head H2 when the preset head H2 is set, and only synchronously adjusts the rotating speed and the opening of the circulating pump 500 when the working head H1 is between the upper limit H3 and the lower limit H4 of the head adjustment in the process of adjusting the working head H1 of the circulating pump 500, thereby accelerating the adjustment of the working head H1 without affecting the adjustment of the overheating degree by changing the opening.

[0102] Based on the above scheme, please refer to Figure 2 As shown, when the preset overheating degree K2 is set, the upper limit K3 and the lower limit K4 of the overheating degree adjustment are set, the upper limit K3 of the overheating degree adjustment is greater than the lower limit K4 of the overheating degree adjustment, the preset overheating degree K2 is greater than the lower limit K4 of the overheating degree adjustment and less than the upper limit K3 of the overheating degree adjustment; in the process of adjusting the rotating speed of the circulating pump 500 according to the comparison result, when the preset overheating degree K2 is greater than the upper limit K3 of the overheating degree adjustment and less than the lower limit K4 of the overheating degree adjustment, the adjustment period of the opening of the circulating pump 500 is longer than the adjustment period of the rotating speed of the circulating pump 500.

[0103] In the process of adjusting the rotating speed and opening of the circulating pump 500 in order to make the working head H1 close to the preset head H2, the actual superheat K1 also changes.When the preset superheat K2 is greater than the superheat adjustment upper limit K3 and less than the superheat adjustment lower limit K4, the adjustment period of the opening of the circulating pump 500 is longer than the adjustment period of the rotating speed of the circulating pump 500; the above-mentioned step can reduce the change range of the opening of the circulating pump 500 in the process of adjustment, and further reduce the possibility that the opening of the circulating pump 500 reaches the limit value after the working head H1 is adjusted.

[0104] Further, please refer to Figure 2 In some embodiments, when the preset superheat K2 is set, the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3; in the process of adjusting the opening of the circulating pump 500 to make the preset superheat K2 equal to the preset superheat K2, the rotating speed and the opening of the circulating pump 500 are adjusted until the preset superheat K2 is greater than the superheat adjustment upper limit K3 and less than the superheat adjustment lower limit K4, and then the opening of the circulating pump 500 is adjusted to make the preset superheat K2 equal to the preset superheat K2.

[0105] After the working head H1 is adjusted, the difference between the actual superheat K1 and the preset superheat K2 may be too large, resulting in that the actual superheat K1 cannot be equal to the preset superheat K2 by adjusting only the opening of the circulating pump 500. By adjusting the rotating speed and the opening of the circulating pump 500 to make the preset superheat K2 between the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4, it can be ensured that the actual superheat K1 is equal to the preset superheat K2 by adjusting the opening of the circulating pump 500. The person skilled in the art can set the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4 according to the actual situation of the electric welding machine cooling system.

[0106] Without departing from the inventive concept of the present application, please refer to Figure 4 After the actual superheat K1 and the preset superheat K2 are equal, the working head H1 of the circulating pump 500 and the preset head H2 can be compared again, and the opening and the rotating speed of the circulating pump 500 can be adjusted according to the comparison result, and then the actual superheat K1 and the preset superheat K2 are made equal again; the above-mentioned scheme can avoid that the working head H1 deviates unexpectedly in the process of adjusting the superheat, and can keep the electric welding machine cooling system stable.

[0107] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. Furthermore, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. Electric welding machine cooling system, cooled by means of a cooling medium, characterized in that, The cooling medium is made of gas-liquid phase change material, comprising: a cooling pipeline; a welding gun of the electric welding machine, arranged in the cooling pipeline and capable of exchanging heat with the cooling medium in the cooling pipeline; a cooling device, arranged in the cooling pipeline and capable of cooling the cooling medium flowing through the cooling pipeline; a storage tank for storing the cooling medium, the inlet end and the outlet end of the cooling pipeline being in communication with the inside of the storage tank; a circulating pump capable of extracting the cooling medium in the storage tank and conveying it from the inlet end of the cooling pipeline into the cooling pipeline, the cooling medium becoming gaseous after flowing through the welding gun of the electric welding machine and becoming liquid after flowing through the cooling device; a first temperature sensor; a control module, signal connected to the circulating pump and the first temperature sensor, capable of obtaining the current working head H1 of the circulating pump and the actual temperature T1 of the cooling medium in the cooling pipeline through the first temperature sensor; the control module being configured to increase the rotating speed of the circulating pump when the actual temperature T1 is higher than a preset temperature T2 and the working head H1 is higher than a preset head H2, or when the actual temperature T1 is higher than the preset temperature T2 and the working head H1 is lower than the preset head H2, and to decrease the rotating speed of the circulating pump when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is lower than the preset head H2, or when the actual temperature T1 is lower than the preset temperature T2 and the working head H1 is higher than the preset head H2; the electric welding machine cooling system further comprising a second temperature sensor and a throttling device, the second temperature sensor being signal connected to the control module, the throttling device being arranged in the cooling pipeline and used for setting the opening of the circulating pump; the control module being further capable of obtaining the actual superheat K1 of the gaseous cooling medium in the cooling pipeline through the second temperature sensor; the control module being configured to control the throttling device to increase the opening of the circulating pump when the actual superheat K1 is higher than a preset superheat K2, and to control the throttling device to decrease the opening of the circulating pump when the actual superheat K1 is lower than the preset superheat K2; the electric welding machine cooling system comprising a humidity sensor and a gas pressure sensor, the control module being capable of obtaining the dew point temperature T4 of the outside through the humidity sensor and the gas pressure of the gaseous cooling medium through the gas pressure sensor to obtain the saturation temperature T5 of the cooling medium under the current pressure; the control module being configured to increase the rotating speed of the circulating pump until the saturation temperature T5 is higher than the dew point temperature T4 when the dew point temperature T4 is higher than the saturation temperature T5.

2. The electric welder cooling system of claim 1, wherein, The electric welding machine cooling system further comprises a first temperature sensor, the control module is signal connected to the first temperature sensor and can obtain the actual temperature T1 of the cooling medium in the cooling pipeline through the first temperature sensor; the control module is configured to increase the rotating speed of the circulating pump to the upper limit, increase the opening of the circulating pump to the upper limit and increase the power of the cooling device to the upper limit when the actual temperature T1 is higher than the warning temperature T3.

3. A method of controlling the cooling of a welding machine, performed using the welding machine cooling system of claim 1 or 2, characterized in that, The electric welding machine cooling system is cooled by a cooling medium, and the cooling medium is a gas-liquid phase change material, comprising the following steps: A preset head H2 is set, and a head adjustment upper limit H3 and a head adjustment lower limit H4 are set, the head adjustment upper limit H3 is greater than the head adjustment lower limit H4, the preset head H2 is greater than the head adjustment lower limit H4 and less than the head adjustment upper limit H3; The current working head H1 of the circulating pump is obtained; The working head H1 and the preset head H2 are compared; The rotating speed of the circulating pump is adjusted according to the comparison result: the rotating speed of the circulating pump is decreased when the working head H1 is higher than the preset head H2, or the rotating speed of the circulating pump is increased when the working head H1 is lower than the preset head H2, so that the working head H1 is equal to the preset head H2; After the working head H1 is greater than the head adjustment lower limit H4 and less than the head adjustment upper limit H3, the opening of the circulating pump is increased synchronously with the increase of the rotating speed of the circulating pump, and the opening of the circulating pump is decreased synchronously with the decrease of the rotating speed of the circulating pump; A preset superheat K2 is set, and a superheat adjustment upper limit K3 and a superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3; The actual superheat K1 of the gaseous cooling medium in the cooling pipeline is obtained; After the working head H1 is equal to the preset head H2, the opening of the circulating pump is adjusted to make the actual superheat K1 equal to the preset superheat K2: the rotating speed and the opening of the circulating pump are adjusted until the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3, and then the opening of the circulating pump is adjusted to make the actual superheat K1 equal to the preset superheat K2.

4. The electric welder cooling control method of claim 3, wherein, When the preset superheat K2 is set, the superheat adjustment upper limit K3 and the superheat adjustment lower limit K4 are set, the superheat adjustment upper limit K3 is greater than the superheat adjustment lower limit K4, and the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3; In the process of adjusting the rotating speed of the circulating pump according to the comparison result, when the preset superheat K2 is greater than the superheat adjustment lower limit K4 and less than the superheat adjustment upper limit K3, the adjustment period of the opening of the circulating pump is longer than the adjustment period of the rotating speed of the circulating pump.

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