Electric welding machine cooling system and liquid shortage detection method

Abstract

The invention provides an electric welding machine cooling system and a liquid shortage detection method. The electric welding machine cooling system comprises a cooling pipeline, an electric welding machine, a cooling device, a storage tank, a circulating pump, an alarm device and a detection module. The circulating pump can extract the cooling liquid in the storage tank and convey the cooling liquid into the cooling pipeline from the inlet end of the cooling pipeline; the control module can obtain the current working current value of the circulating pump and the current working lift of the circulating pump; and when the working current value of the circulating pump is lower than the preset current value and the working lift of the circulating pump is lower than the preset lift, the control module enables the alarm device to give an alarm. The cooling system of the electric welding machine can give an alarm in case of liquid shortage so as to remind workers. The liquid shortage detection method provided by the invention is executed by adopting the electric welding machine cooling system of any embodiment, so that the outside world can process the electric welding machine cooling system in time according to information.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a cooling system of an electric welder and a method for detecting liquid shortage. Background Art

[0002] In the related art, the windings and iron core inside the electric welder will generate a large amount of heat when the electric welder is working, so a welding machine cooling system matching the electric welder is required to transfer the heat inside the electric welder. The welding machine cooling system usually uses liquid cooling to dissipate heat inside the welding machine. The coolant in the storage tank is pumped into the cooling pipeline by a flow pump. The coolant in the cooling pipeline enters the welding machine to absorb heat and then dissipates heat through the cooling device, and finally flows back to the storage tank so that it can be pumped into the cooling pipeline again by the flow pump. The lack of liquid in the cooling system of the welding machine will cause the cooling effect of the welding machine to decrease. Due to the dynamic change of the flow in the cooling system of the welding machine with frequency conversion function, the prior art lacks a detection means for judging whether the cooling system of the welding machine with frequency conversion function is lacking liquid. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a cooling system for an electric welder, which can give an alarm to remind the staff when the cooling system of the electric welder is short of liquid.

[0004] The invention also provides a liquid shortage detection method.

[0005] According to the first aspect of the present invention, the welding machine cooling system is cooled by coolant, and comprises:

[0006] Cooling pipes;

[0007] An electric welder, disposed in the cooling pipeline and capable of exchanging heat with the coolant in the cooling pipeline;

[0008] a cooling device, disposed in the cooling pipeline and capable of cooling the coolant flowing through the cooling pipeline;

[0009] A storage tank, used to store the coolant, wherein the inlet and outlet ends of the cooling pipeline are both connected to the interior of the storage tank;

[0010] A circulating pump, capable of extracting the coolant in the storage tank and delivering it from the inlet end of the cooling pipeline to the cooling pipeline; at the same speed, the circulating pump has a load current value I1 and a load head H1 when carrying a certain load, and has an idling current value I0 when unloaded;

[0011] Warning device;

[0012] A control module, signal-connected to the circulation pump and the alarm device, the control module can obtain the current working current value I2 of the circulation pump and the current working head H2 of the circulation pump; the control module is configured to make the alarm device sound an alarm when the working current value I2 of the circulation pump is lower than the preset current value I3, and when the working head H2 of the circulation pump is lower than the preset head H3; the load current value I1 is greater than the preset current value I3, and the preset current value I3 is greater than or equal to the idling current value I0; the preset head H3 is lower than the load head H1.

[0013] The electric welder cooling system according to the embodiment of the present invention has at least the following beneficial effects: the circulating pump transports the coolant in the storage tank from the inlet end of the cooling pipeline into the cooling pipeline, so that the coolant can exchange heat with the electric welder arranged in the cooling pipeline, thereby cooling the electric welder; the coolant can also release the heat absorbed after the heat exchange with the electric welder at the cooling device, and return to the storage tank through the outlet end of the cooling pipeline, so that it can be transported to the cooling pipeline by the circulating pump for the next round of cooling. At a certain speed, the working current value of the circulating pump is positively correlated with the amount of coolant in the storage tank. When the working current value is lower than the preset current value, it means that the coolant level in the storage tank is lower than the coolant level in the storage tank with normal load, and the coolant in the storage tank is at a low level; and when the working head is lower than the preset head, it means that the coolant content currently delivered to the cooling pipeline by the circulating pump is at a low level, and the coolant content in the cooling pipeline is also at a low level; the coolant content in the storage tank and the coolant content in the cooling pipeline are both at a low level, which means that the coolant content in the cooling system of the welding machine is lower than the normal coolant content in the cooling system of the welding machine, and the cooling system of the welding machine is short of liquid; therefore, the control module controls the alarm device to sound an alarm based on the working current value lower than the preset current value and the working head lower than the preset head, reminding the on-site staff of the lack of liquid.

[0014] According to some embodiments of the present invention, the welding machine cooling system also includes a timer, and the timer signal is connected to the control module; when the working current value I2 of the circulating pump is lower than the preset current value I3, and when the working head H2 of the circulating pump is lower than the preset head H3, the timer starts timing and accumulates the time when the working current value I2 is lower than the preset current value I3 and the working head H2 is lower than the preset head H3; the control module is configured to cause the alarm device to sound an alarm when the accumulated time of the timer reaches a first preset time.

[0015] According to some embodiments of the present invention, the control module is configured to control the cooling system of the welding machine to shut down when the accumulated time of the timer reaches a second preset time; the second preset time is longer than the first preset time.

[0016] According to some embodiments of the present invention, the circulating pump has a circulating pump inlet and a circulating pump outlet, and the coolant in the storage tank drawn by the circulating pump passes through the circulating pump inlet and the circulating pump outlet in sequence; the control module includes a pump inlet pressure sensor and a pump outlet pressure sensor, and the control module derives the working head H2 based on the detection results of the pump inlet pressure sensor and the detection results of the pump outlet pressure sensor, the pump inlet pressure sensor is arranged at the circulating pump inlet, and the pump outlet pressure sensor is arranged at the circulating pump outlet.

[0017] According to some embodiments of the present invention, the welding machine cooling system also includes a current alarm device, and the current alarm device signal is connected to the control module; the control module is configured to cause the current alarm device to alarm after the working current value I2 of the circulating pump is lower than the preset current value I3.

[0018] According to some embodiments of the present invention, the welding machine cooling system also includes a lift alarm device, and the lift alarm device signal is connected to the control module; the control module is configured to cause the lift alarm device to alarm after the working lift H2 of the circulating pump is lower than the preset lift H3.

[0019] According to some embodiments of the present invention, the welding machine cooling system also includes a circulating pump alarm device, and the circulating pump alarm device signal is connected to the control module; the control module is configured to cause the circulating pump alarm device to alarm when the working current value I2 is lower than the idling current value I0.

[0020] According to some embodiments of the present invention, the electric welder, the cooling device, the circulating pump and the storage tank are all sealedly connected to the cooling pipeline.

[0021] According to the second aspect of the present invention, the method for detecting liquid shortage is implemented by using the welding machine cooling system described in any of the above embodiments, and comprises the following steps:

[0022] Continuously obtain the working head H2 and working current value I2 of the circulating pump;

[0023] When the working lift H2 is lower than the preset lift H3 and the working current value I2 is lower than the preset current value I3, information that the cooling system of the welding machine is short of liquid is output.

[0024] According to the method for detecting lack of liquid of the embodiment of the present invention, at least the following beneficial effects are achieved: at a certain speed, the working current value of the circulating pump is positively correlated with the amount of coolant in the storage tank, and when the working current value is lower than the preset current value, it means that the liquid level of the coolant in the storage tank is lower than the liquid level of the coolant in the storage tank with a normal load, and the coolant in the storage tank is at a lower level; and when the working head is lower than the preset head, it means that the coolant content currently delivered to the cooling pipeline by the circulating pump is at a lower level, and the coolant content in the cooling pipeline is also at a lower level. If the coolant content in the storage tank and the coolant content in the cooling pipeline are both at a lower level, it means that the coolant content in the cooling system of the welding machine is lower than the coolant content in the normal welding machine cooling system, and the cooling system of the welding machine is lack of liquid; therefore, when the working head is lower than the preset head and the working current value is lower than the preset current value, the information of lack of liquid in the cooling system of the welding machine is output, so that the outside world can process the cooling system of the welding machine in time according to the information.

[0025] According to some embodiments of the present invention, when the working head H2 is lower than the preset head H3 and the working current value I2 is lower than the preset current value I3, the time during which the working head H2 is lower than the preset head H3 and the working current value I2 is lower than the preset current value I3 is accumulated, and when the accumulated time reaches a first preset time, information indicating that the welding machine cooling system is short of liquid is output.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0028] Figure 1 It is a connection schematic diagram of a cooling system for an electric welding machine in some embodiments of the first aspect of the present invention;

[0029] Figure 2 A schematic diagram of signal flow of a cooling system for an electric welding machine in some embodiments of the first aspect of the present invention;

[0030] Figure 3 A schematic diagram of signal flow of a cooling system for an electric welding machine in some embodiments of the second aspect of the present invention;

[0031] Figure 4 A schematic diagram of signal flow of a cooling system for an electric welding machine in some embodiments of the third aspect of the present invention;

[0032] Figure 5 The present invention is a schematic diagram of the signal flow of a cooling system for an electric welding machine according to some embodiments of the fourth aspect of the present invention.

[0033] Reference numerals:

[0034] Cooling pipeline 100, inlet end 110, outlet end 120, welding machine inlet 210, welding machine outlet 220, cooling device 300, storage tank 400, circulation pump 500, control module 600, pump inlet pressure sensor 610, pump outlet pressure sensor 620, alarm device 700. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0040] Please refer to Figure 1 As shown, Figure 1The electric welder is not shown, and only an electric welder inlet 210 and an electric welder outlet 220 connected to the internal channel of the electric welder are shown. The present invention discloses an electric welder cooling system using coolant cooling, including a cooling pipeline 100, an electric welder, a cooling device 300, a storage tank 400, a circulating pump 500, an alarm device 700 and a control module 600; the electric welder is arranged in the cooling pipeline 100 and can exchange heat with the coolant in the cooling pipeline 100; the cooling device 300 is arranged in the cooling pipeline 100 and can cool the coolant flowing through the cooling pipeline 100; the storage tank 400 is used to store the coolant, 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 coolant in the storage tank 400 and transport it from the inlet end 110 of the cooling pipeline 100 to the cooling pipeline 100.

[0041] The circulation pump 500 transports the coolant in the storage tank 400 from the inlet end 110 of the cooling pipeline 100 to the cooling pipeline 100, so that the coolant can exchange heat with the electric welder arranged in the cooling pipeline 100, thereby cooling the electric welder; the coolant can also release the heat absorbed after the heat exchange 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, so that it can be transported to the cooling pipeline 100 by the circulation pump 500 for the next round of cooling. In the above manner, the electric welder cooling system enables the coolant to circulate in the cooling pipeline 100 and continuously cool the electric welder.

[0042] At the same speed, the circulating pump 500 has a load current value I1 and a load head H1 when it is loaded, and has an idling current value I0 when it is unloaded. It should be noted that in the variable frequency electric welding machine cooling system, the circulating pump 500 needs to adjust its own speed appropriately according to the cooling demand of the electric welding machine so as to change the coolant flow to the cooling pipeline 100; at different speeds, the load current value I1 and the load head H1 of the circulating pump 500 when it is loaded may change with the speed, and the above-mentioned load current value I1 and load head H1 can be obtained when the electric welding machine cooling system is in normal working state.

[0043] Please refer to Figure 2 As shown, the control module 600 is connected to the circulation pump 500 and the alarm device 700 by signal, and the control module 600 can obtain the current working current value I2 of the circulation pump 500 and the current working head H2 of the circulation pump 500. The working current value I2 refers to the real-time current value of the circulation pump 500 in the current operation, and the working head H2 refers to the actual head obtained by the control module 600 from the circulation pump 500 in the current operation.

[0044] The present invention does not limit the specific manner in which the control module 600 obtains the working current value I2 of the circulation pump 500. As some examples of specific manners, in some embodiments, the control module 600 includes a current sensor, and the control module 600 obtains the working current value I2 of the circulation pump 500 through the current sensor; in other embodiments, the circulation pump 500 includes a frequency converter, and the frequency converter has a communication interface for outputting the working current value I2 to the control module 600, and the circulation pump 500 is connected to the control module 600 through the communication interface signal.

[0045] The present invention also does not limit the specific manner in which the control module 600 obtains the working head H2 of the circulation pump 500. For some examples of specific manners, please refer to Figure 1 As shown, in some embodiments, the control module 600 includes a pump inlet pressure sensor 610 and a pump outlet pressure sensor 620, wherein the pump inlet pressure sensor 610 is disposed upstream of the circulation pump 500 in the cooling pipeline 100, and the pump outlet pressure sensor 620 is disposed downstream of the circulation pump 500 in the cooling pipeline 100; the control module 600 can obtain the working head H2 of the circulation pump 500 through the detection results of the pump inlet pressure sensor 610 and the detection results of the pump outlet pressure sensor 620. Specifically, the control module 600 obtains the pressure value at the location where the pump inlet pressure sensor 610 is set through the pump inlet pressure sensor 610, and obtains the pressure value at the location where the pump outlet pressure sensor 620 is set through the pump outlet pressure sensor 620, and the control module 600 records the difference between the two pressure values ​​as the working head H2 of the circulation pump 500.

[0046] As a preferred solution to obtain the working head H2, please refer to Figure 1 As shown, Figure 1 The circulation pump inlet and the circulation pump outlet are not shown; in some embodiments, the circulation pump 500 has a circulation pump inlet and a circulation pump outlet, and the coolant in the storage tank 400 drawn by the circulation pump 500 passes through the circulation pump inlet and the circulation pump 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 H2 according to the detection results of the pump inlet pressure sensor 610 and the detection results of the pump outlet pressure sensor 620, and the pump inlet pressure sensor 610 is arranged at the circulation pump inlet, and the pump outlet pressure sensor 620 is arranged at the circulation pump outlet. The pump inlet pressure sensor 610 is arranged at the circulation pump inlet, and the pump outlet pressure sensor 620 is arranged at the circulation pump outlet. The kinetic energy lost due to the friction between the coolant and the cooling pipeline 100 when flowing in the cooling pipeline 100 can be reduced, so that the working head H2 obtained by the control module 600 is closer to the actual head, and the measurement error of the working head H2 is reduced.

[0047] In the present invention, please refer to Figure 1 , Figure 2 As shown, the control module 600 is configured to cause the alarm device 700 to sound an alarm when the working current value I2 of the circulation pump 500 is lower than the preset current value I3 and the working head H2 of the circulation pump 500 is lower than the preset head H3; the load current value I1 is greater than the preset current value I3, and the preset current value I3 is greater than or equal to the idling current value I0; and the preset head H3 is lower than the load head H1.

[0048] At a certain speed, the working current value I2 of the circulating pump 500 is positively correlated with the amount of coolant in the storage tank 400. When the working current value I2 is lower than the preset current value I3, it means that the liquid level of the coolant in the storage tank 400 is lower than the liquid level of the coolant in the storage tank 400 with a normal load, and the coolant in the storage tank 400 is at a lower level; and when the working head H2 is lower than the preset head H3, it means that the coolant content currently delivered to the cooling pipeline 100 by the circulating pump 500 is at a lower level, and the coolant content in the cooling pipeline 100 is is also at a low level; the coolant content in the storage tank 400 and the coolant content in the cooling pipeline 100 are both at a low level, which means that the coolant content in the cooling system of the welding machine is lower than the normal coolant content in the cooling system of the welding machine, and the cooling system of the welding machine is short of liquid; therefore, the control module 600 controls the alarm device 700 to give an alarm based on the working current value I2 which is lower than the preset current value I3 and the working head H2 which is lower than the preset head H3, to remind the on-site staff that the cooling system of the welding machine has been short of liquid.

[0049] It should be noted that, as mentioned above, in the variable frequency welding machine cooling system, the load current value I1 and the load head H1 of the circulating pump 500 may change with the speed; therefore, the preset current value I3 and the preset head H3 should also be adjusted accordingly with the speed. Exemplarily, the preset current value I3 can be 30-90% of the load current value I1 at the current speed (but should be higher than the idling current value I0 of the circulating pump 500 at the same speed), or it can be a value lower than the specific current value of the load current value I1 at the current speed; the preset head H3 can be 40-80% of the load head H1 at the current speed, or it can be a value lower than the specific load value of the current load head H1. Those skilled in the art can also appropriately adjust the preset current value I3 according to the measurement error of the load current value I1 of the circulating pump 500, and can also appropriately adjust the preset head H3 according to the measurement error of the load head H1 of the circulating pump 500.

[0050] Without departing from the inventive concept of the present invention, the coolant can be made of a gas-liquid phase change material, the coolant is in a liquid state before cooling the electric welder, and becomes a gaseous gas to be cooled after flowing through the electric welder, and the gas to be cooled becomes a coolant again after passing through the cooling device 300, and finally flows into the storage tank 400. Through the above scheme, the electric welder cooling system can utilize the gasification process of the coolant to absorb more heat from the internal structure of the electric welder, and can also utilize the liquefaction process of the gas to be cooled to release more heat at the cooling device 300; the gas-liquid phase change material has a small temperature change amplitude during the gasification and liquefaction process, so it can further maintain the temperature difference between the internal structure of the electric welder and the internal structure of the electric welder when absorbing heat, and further maintain the temperature difference between the heat exchange structure of the cooling device 300 when releasing heat at the cooling device 300, further ensuring the stability of heat exchange.

[0051] For further information, please refer to Figure 3 As shown, in some embodiments, the welding machine cooling system also includes a timer, and the timer signal is connected to the control module 600; when the working current value I2 of the circulating pump 500 is lower than the preset current value I3, and when the working head H2 of the circulating pump 500 is lower than the preset head H3, the timer starts timing and accumulates the time when the working current value I2 is lower than the preset current value I3 and the working head H2 is lower than the preset head H3; the control module 600 is configured to cause the alarm device 700 to sound an alarm when the accumulated time of the timer reaches the first preset time.

[0052] Since the cooling system of the electric welding machine needs to frequently adjust the circulating pump 500, the electric welding machine and the cooling device 300 during operation, the operating current value I2 and the working head H2 obtained by the control module 600 may fluctuate, and then the operating current value I2 is lower than the preset current value I3 and the working head H2 is lower than the preset head H3 at a certain moment, so that the control system causes the alarm device 700 to alarm when the cooling system of the electric welding machine is not short of liquid. Through the above scheme, since the control module 600 requires the timer to alarm the alarm device 700 only when the accumulated time reaches the first preset time, the cooling system of the electric welding machine can avoid the operating current value I2 temporarily lower than the preset current value I3 and the working head H2 temporarily lower than the preset head H3 due to its own fluctuation, thereby avoiding the alarm device 700 from misreporting. Those skilled in the art can adjust the first preset time according to the duration of the fluctuation in the cooling system of the electric welding machine.

[0053] In some preferred embodiments, when the timer accumulates the time when the working current value I2 is lower than the preset current value I3 and the working head H2 is lower than the preset head H3, when the working current value I2 is higher than the preset current value I3 or when the working head H2 is higher than the preset head H3, the control module 600 interrupts the timing of the timer and clears the accumulated time of the timer. Through the above scheme, the timer can restart the accumulation of the time when the working current value I2 is lower than the preset current value I3 and the working head H2 is lower than the preset head H3, realizing the reuse of the timer, so that the timer can continue to detect the cooling system of the welding machine in operation.

[0054] Further, in some embodiments, the control module 600 is configured to control the cooling system of the welding machine to shut down when the accumulated time of the timer reaches a second preset time; the second preset time is longer than the first preset time. Through the above scheme, when the staff does not handle the warning of the cooling system of the welding machine in time, the control module 600 can directly shut down the cooling system of the welding machine to avoid damage to the components in the cooling system of the welding machine.

[0055] For further information, please refer to Figure 4 As shown, in some embodiments, the cooling system of the welding machine further includes a current alarm device, and the current alarm device signal is connected to the control module 600; the control module 600 is configured to make the current alarm device alarm after the working current value I2 of the circulating pump 500 is lower than the preset current value I3. Through the above scheme, the cooling system of the welding machine can perform a separate detection on whether the working current value I2 is lower than the preset current value I3, which is helpful for the staff to understand the operation of the cooling system of the welding machine.

[0056] Further, in some embodiments, the welding machine cooling system further includes a circulating pump alarm device, and the circulating pump alarm device signal is connected to the control module 600; the control module 600 is configured to make the circulating pump alarm device alarm when the working current value I2 is lower than the idling current value I0. For a circulating pump 500 of a certain speed, the idling current value I0 is the minimum value of the working current of the circulating pump 500, and when the working current value I2 is lower than the idling current value I0, it means that the circulating pump 500 has an abnormal situation, and the circulating pump alarm device issues an alarm at this time to remind the staff to deal with the abnormality of the circulating pump 500.

[0057] For further information, please refer to Figure 5As shown, in some embodiments, the cooling system of the electric welding machine further includes a head alarm device, and the head alarm device signal is connected to the control module 600; the control module 600 is configured to make the head alarm device alarm after the working head H2 of the circulating pump 500 is lower than the preset head H3. Through the above scheme, the cooling system of the electric welding machine can perform a separate detection on whether the working head H2 is lower than the preset head H3, which is helpful for the staff to understand the operation of the cooling system of the electric welding machine.

[0058] Further, in some embodiments, the electric welder, the cooling device 300, the circulating pump 500 and the storage tank 400 are all sealed and connected to the cooling pipeline 100. Through the above scheme, the coolant is less likely to flow out to the outside from the connection between the electric welder, the cooling device 300, the circulating pump 500, the storage tank 400 and the cooling pipeline 100, and the cooling system of the electric welder is less likely to lack liquid or leak liquid, and the risk of the coolant freezing and cracking the cooling system of the electric welder in a low-temperature working environment can be reduced, thereby improving the reliability of the system.

[0059] Please refer to Figure 1 As shown, taking the connection between the cooling pipeline 100 and the storage tank 400 as an example, in some embodiments, the cooling system of the electric welding machine includes a seal, the cooling pipeline 100 is connected to the storage tank 400, and the seal is arranged at the connection between the cooling pipeline 100 and the storage tank 400. The seal in the above embodiment can be a commonly used waterproof rubber ring, waterproof tape or waterproof glue, etc. Without departing from the concept of the present invention, a seal can also be arranged at the connection between the electric welding machine and the cooling pipeline 100, the connection between the circulating pump 500 and the cooling pipeline 100, the connection between the cooling device 300 and the cooling pipeline 100, and the connection between different pipelines in the cooling pipeline 100, so as to reduce the possibility of lack of liquid and leakage in the cooling system of the electric welding machine.

[0060] The present invention further proposes a method for detecting liquid shortage of a cooling system of an electric welding machine using any one of the above embodiments, comprising the following steps:

[0061] Continuously obtain the working head H2 and working current value I2 of the circulation pump 500;

[0062] When the working lift H2 is lower than the preset lift H3 and the working current value I2 is lower than the preset current value I3, the information that the cooling system of the welding machine is short of liquid is output.

[0063] At a certain rotation speed, the working current value I2 of the circulating pump 500 is positively correlated with the amount of coolant in the storage tank 400. When the working current value I2 is lower than the preset current value I3, it means that the liquid level of the coolant in the storage tank 400 is lower than the liquid level of the coolant in the storage tank 400 with normal load, and the coolant in the storage tank 400 is at a lower level; and when the working head H2 is lower than the preset head H3, it means that the coolant content currently delivered to the cooling pipeline 100 by the circulating pump 500 is at a lower level, and the coolant content in the cooling pipeline 100 is also at a lower level.

[0064] The coolant content in the storage tank 400 and the coolant content in the cooling pipeline 100 are both at a low level, which means that the coolant content in the cooling system of the welding machine is lower than the coolant content in the normal welding machine cooling system, and the cooling system of the welding machine is short of liquid; therefore, when the working head H2 is lower than the preset head H3 and the working current value I2 is lower than the preset current value I3, the information that the cooling system of the welding machine is short of liquid is output, so that the outside world can process the cooling system of the welding machine according to the information in time. As for the specific method of outputting the information that the cooling system of the welding machine is short of liquid, in some embodiments, the alarm information can be conveyed to the outside world through the alarm device so that the staff can manually process the cooling system of the welding machine; in other embodiments, the corresponding instructions can be transmitted to the control terminal of the outside world, and the control terminal then processes the cooling system of the welding machine according to the instructions.

[0065] Further, on the basis of the above method, when the working head H2 is lower than the preset head H3 and the working current value I2 is lower than the preset current value I3, the time when the working head H2 is lower than the preset head H3 and the working current value I2 is lower than the preset current value I3 is accumulated, and when the accumulated time reaches the first preset time, the information of the lack of liquid in the cooling system of the welding machine is output. The above method can avoid the situation that the working current value I2 is temporarily lower than the preset current value I3 and the working head H2 is temporarily lower than the preset head H3 due to the self-fluctuation of the cooling system of the welding machine, thereby reducing the situation of outputting erroneous information to the outside world and increasing the detection accuracy of the detection method.

[0066] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. The cooling system of the welding machine uses coolant cooling, which is characterized by: include: Cooling pipes; An electric welder, disposed in the cooling pipeline and capable of exchanging heat with the coolant in the cooling pipeline; a cooling device, disposed in the cooling pipeline and capable of cooling the coolant flowing through the cooling pipeline; A storage tank, used to store the coolant, wherein the inlet and outlet of the cooling pipeline are both connected to the interior of the storage tank; A circulating pump, capable of extracting the coolant in the storage tank and delivering it from the inlet end of the cooling pipeline to the cooling pipeline; at the same speed, the circulating pump has a load current value I1 and a load head H1 when carrying a certain load, and has an idling current value I0 when unloaded; Warning device; A control module, signal-connected to the circulation pump and the alarm device, the control module can obtain the current working current value I2 of the circulation pump and the current working head H2 of the circulation pump; the control module is configured to make the alarm device sound an alarm when the working current value I2 of the circulation pump is lower than the preset current value I3, and the working head H2 of the circulation pump is lower than the preset head H3; the load current value I1 is greater than the preset current value I3, and the preset current value I3 is greater than or equal to the idling current value I0; the preset head H3 is lower than the load head H1.

2. The welding machine cooling system according to claim 1, characterized in that: The welding machine cooling system also includes a timer, and the timer signal is connected to the control module; when the working current value I2 of the circulating pump is lower than the preset current value I3, and when the working head H2 of the circulating pump is lower than the preset head H3, the timer starts timing and accumulates the time when the working current value I2 is lower than the preset current value I3 and the working head H2 is lower than the preset head H3; the control module is configured to cause the alarm device to sound an alarm when the accumulated time of the timer reaches a first preset time.

3. The welding machine cooling system according to claim 2, characterized in that: The control module is configured to control the cooling system of the welding machine to shut down when the accumulated time of the timer reaches a second preset time; the second preset time is longer than the first preset time.

4. The welding machine cooling system according to claim 1, characterized in that: The circulation pump has a circulation pump inlet and a circulation pump outlet, and the coolant in the storage tank drawn by the circulation pump passes through the circulation pump inlet and the circulation pump outlet in sequence; the control module includes a pump inlet pressure sensor and a pump outlet pressure sensor, and the control module obtains the working head H2 based on the detection results of the pump inlet pressure sensor and the detection results of the pump outlet pressure sensor, the pump inlet pressure sensor is arranged at the circulation pump inlet, and the pump outlet pressure sensor is arranged at the circulation pump outlet.

5. The welding machine cooling system according to claim 1, characterized in that: The welding machine cooling system also includes a current alarm device, and the current alarm device signal is connected to the control module; the control module is configured to make the current alarm device alarm after the working current value I2 of the circulating pump is lower than the preset current value I3.

6. The welding machine cooling system according to claim 1, characterized in that: The welding machine cooling system further comprises a lift alarm device, and a signal of the lift alarm device is connected to the control module; the control module is configured to make the lift alarm device sound an alarm after the working lift H2 of the circulating pump is lower than the preset lift H3.

7. The welding machine cooling system according to claim 1, characterized in that: The welding machine cooling system also includes a circulating pump alarm device, and the circulating pump alarm device signal is connected to the control module; the control module is configured to make the circulating pump alarm device alarm when the working current value I2 is lower than the idling current value I0.

8. The welding machine cooling system according to claim 1, characterized in that: The electric welder, the cooling device, the circulating pump and the storage tank are all sealed and connected to the cooling pipeline.

9. A method for detecting lack of liquid, implemented by the cooling system of an electric welding machine according to any one of claims 1 to 8, characterized in that: The following steps are involved: Continuously obtain the working head H2 and working current value I2 of the circulating pump; When the working lift H2 is lower than the preset lift H3 and the working current value I2 is lower than the preset current value I3, information on the lack of liquid in the cooling system of the welding machine is output.

10. The method for detecting liquid shortage according to claim 9, characterized in that: When the working head H2 is lower than the preset head H3 and the working current value I2 is lower than the preset current value I3, the time during which the working head H2 is lower than the preset head H3 and the working current value I2 is lower than the preset current value I3 is accumulated, and when the accumulated time reaches the first preset time, the information that the welding machine cooling system is short of liquid is output.

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