CN116135417A - Welding water vapor control unit, welding system and related method - Google Patents

Welding water vapor control unit, welding system and related method Download PDF

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Publication number
CN116135417A
CN116135417A CN202111357050.1A CN202111357050A CN116135417A CN 116135417 A CN116135417 A CN 116135417A CN 202111357050 A CN202111357050 A CN 202111357050A CN 116135417 A CN116135417 A CN 116135417A
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CN
China
Prior art keywords
water
welding
control unit
waterway
abnormality detection
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CN202111357050.1A
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Chinese (zh)
Inventor
马清海
赖光兵
何翾
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Smc Tianjin Manufacturing Co ltd
Smc China Co ltd
SMC Beijing Manufacturing Co Ltd
SMC Corp
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Smc Tianjin Manufacturing Co ltd
Smc China Co ltd
SMC Beijing Manufacturing Co Ltd
SMC Corp
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Application filed by Smc Tianjin Manufacturing Co ltd, Smc China Co ltd, SMC Beijing Manufacturing Co Ltd, SMC Corp filed Critical Smc Tianjin Manufacturing Co ltd
Priority to CN202111357050.1A priority Critical patent/CN116135417A/en
Publication of CN116135417A publication Critical patent/CN116135417A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/14—Conveying liquids or viscous products by pumping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

The invention discloses a welding water vapor control unit, a welding system and a related method. The welding water vapor control unit comprises: the water-saving device comprises a safety relay, a waterway abnormality detection device and a water-break control electromagnetic valve, wherein the waterway abnormality detection device and the water-break control electromagnetic valve are electrically connected with the safety relay; the safety relay is used for receiving a water-break control signal of the control host and/or a waterway abnormality detection signal of the waterway abnormality detection device, and controlling the water-break electromagnetic valve to lose electricity so as to enable the waterway of the welding robot connected with the welding water-gas control unit to be turned off. According to the invention, automatic water cut-off is realized in an emergency way under the condition that the electrode cap falls off or tube burst occurs, and the water cut-off is performed without a control command sent by the overall water-gas control unit of the welding system, so that the water cut-off efficiency is improved, the occurrence probability of product pollution and electric shock accidents is greatly reduced, and the production safety is ensured.

Description

Welding water vapor control unit, welding system and related method
Technical Field
The invention relates to the technical field of automatic control, in particular to a welding water vapor control unit, a welding system and a related method.
Background
Welding of automobile bodies is an important process in the automobile manufacturing process, and welding robots are widely applied in factories due to stability and high efficiency. The welding robots in the welding system are respectively connected with corresponding welding water vapor control units, and the welding water vapor control units are responsible for transmitting signals collected by sensor equipment such as water, gas and the like used in the welding process to the overall water vapor bus control unit so as to control the welding robots in the current welding process.
In the welding process, besides electric power and compressed air, the welding robot needs to be operated, components such as a welding gun and the like are also required to be cooled by circulating water, and the head part of the welding gun is generally provided with an electrode cap which needs to be replaced due to the fact that compared with an air path, potential safety hazards are more easily brought to the characteristics of a waterway in the operation process of a welding system, for example, water pipe bursting or electrode cap adhesion falling can cause a large amount of water splashing on site, and at the moment, if the waterway cannot be rapidly shut off, a large amount of splashing water can pollute a product being welded, and safety accidents such as electric short circuit and electric shock are also very easy to be caused.
Disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a welding water vapor control unit, a welding system and a method that overcome or at least partially solve the above problems.
In a first aspect, an embodiment of the present invention provides a welding water vapor control unit, including:
the water-saving device comprises a safety relay, a waterway abnormality detection device and a water-break control electromagnetic valve, wherein the waterway abnormality detection device and the water-break control electromagnetic valve are electrically connected with the safety relay;
the safety relay is used for receiving a water-break control signal of the control host and/or a waterway abnormality detection signal of the waterway abnormality detection device, and controlling the water-break electromagnetic valve to lose electricity so as to enable the waterway of the welding robot connected with the welding water-gas control unit to be turned off.
In one embodiment, the safety relay comprises two signal channels, the control host and the waterway abnormality detection device are connected to any one of the two signal channels, or the control host and the waterway abnormality detection device are respectively connected to different channels of the two signal channels;
the water-break electromagnetic valve is connected to a normally open contact of the safety relay;
the safety relay is used for receiving a water-break control signal and/or a waterway abnormality detection signal, controlling the corresponding channel to be powered off and disconnected, and the normally open contact is disconnected.
In one embodiment, the safety relay is further configured to receive a normal water supply control signal sent by the control host and a waterway normal detection signal sent by the waterway abnormality detection device, and control the normally open contact to be turned on, and the water-break electromagnetic valve is electrically opened, so that a waterway of the welding robot connected with the welding water-gas control unit is turned on.
In one embodiment, the weld moisture control unit further comprises: an intermediate relay arranged between the safety relay and the waterway abnormality detection device;
the two normally open contacts of the intermediate relay are respectively connected with the signal output end of the waterway abnormality detection device and any channel of the safety relay, so that the intermediate relay receives the water break control signal sent by the waterway abnormality detection device, the two normally open contacts are controlled to be disconnected, and the corresponding channel of the safety relay is powered off and disconnected.
In one embodiment, the waterway abnormality detection device includes any one or a combination of the following:
the water flow detection switch is arranged on the water supply pipeline, the water pressure detection switch is arranged on the water return pipeline, and the water pump current detection switch is arranged on the waterway circulating system.
In one embodiment, further comprising: a bus unit and an input module;
the bus unit and the input module are connected with the signal output end of the waterway abnormality detection device and are used for sending the waterway abnormality detection signal output by the waterway abnormality detection device to the overall water-gas control unit of the welding system.
In one embodiment, the weld moisture control unit further comprises: the output module is connected with the safety relay; the output module is used for receiving a water cut-off control signal sent by an overall water-gas control unit of the welding system and transmitting the water cut-off control signal to the safety relay;
the safety relay is also used for controlling the power failure of the water-break electromagnetic valve according to the water-break control signal sent by the overall water-gas control unit.
In a second aspect, an embodiment of the present invention provides a welding system, comprising: the welding robot comprises a control host, at least two welding robots and at least two welding water vapor control units as described above;
the welding water vapor control units are respectively connected with the welding robot;
the control host is connected with the welding water vapor control unit.
In one embodiment, the welding system further comprises: an overall water gas control unit; the overall water-gas control units are respectively connected with the welding water-gas control units;
the overall water-gas control unit is used for monitoring signals sent by the welding water-gas control units, determining a working area where the welding robot connected with the welding water-gas control unit is located if a waterway abnormality detection signal output by the welding water-gas control unit is received, and judging whether a water-break control signal needs to be sent to the welding water-gas control unit in the working area or other working areas associated with the working area according to the working area;
the welding water-gas control unit is also used for controlling the power failure of the self water-cut electromagnetic valve if the water-cut control signal sent by the overall water-gas control unit is received.
In a third aspect, an embodiment of the present invention provides a method for welding using a weld moisture control unit as described above, including:
in the welding process, if a water-break control signal of the control host and/or a water-way abnormality detection signal of the water-way abnormality detection device are received, the water-break electromagnetic valve is controlled to lose electricity, so that a water way of the welding robot connected with the welding water-gas control unit is turned off.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the welding water vapor control unit, the welding system and the related method provided by the embodiment of the invention are improved, the safety relay is arranged in the welding water vapor control unit, and the safety relay is designed to trigger the water-break electromagnetic valve to be powered off immediately when receiving the active water-break control signal or the waterway abnormality detection signal, so that the automatic water-break is realized in emergency under the condition that the electrode cap falls off or the pipe bursts, the water-break efficiency is improved under emergency without sending a control command through the overall water vapor control unit of the welding system, the product pollution and the occurrence probability of electric shock accidents due to waterway faults are greatly reduced, and the production safety is ensured. In addition, the safety relay for automatically controlling the water interruption and the waterway abnormality detection device for detecting the water interruption are arranged together, the physical distance between the safety relay and the waterway abnormality detection device is relatively short, the signal transmission distance is shortened, the response speed is improved, and meanwhile, the overhaul is convenient.
According to the embodiment of the invention, after the welding water vapor control unit controls the water break of the welding water vapor control unit, the water passage abnormality detection signal is sent to the overall water vapor control unit of the welding system, so that the overall water vapor control unit can determine whether to cut off the water passage of other welding robots in the same or adjacent areas based on the arrangement of all working points in the production line, and when a certain welding robot has the condition that an electrode cap falls off or a pipe bursts, on one hand, the local water passage can be cut off in time, the normal welding process is suspended, the safety accident is avoided, and on the other hand, the synergy among all the working points on the production line is ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a schematic structural diagram of a welding water vapor control unit according to an embodiment of the present invention;
FIG. 2 is an electrical schematic diagram of a safety relay provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a welding water vapor control unit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the interior of an electrical control box according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of electrical connection between a safety relay, a water flow detection switch and an intermediate relay according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a welding system according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the existing welding system, the welding water-gas control units connected with the welding robots transmit signals acquired by sensor equipment such as water, gas and the like used in the welding process to the overall water-gas bus control unit, so that when water and gas faults occur, the bus control unit determines the fault point and the area according to the received faults, judges the fault level, and then sends a control instruction to the corresponding welding water-gas control unit to control the water-shut-off valve, thereby realizing the water-off or gas-off operation of the welding robots in the fault point or the fault area, and the response time is long.
Because the welding gun head is generally provided with the electrode cap which needs to be replaced due to expiration in the welding procedure, the probability of water channel failure is higher compared with that of a gas circuit, a large amount of water can be sprayed on site if the water pipeline bursts or the electrode cap is adhered and falls off in the operation process of the welding system, and if the water channel cannot be shut off in time, safety accidents such as electrical short circuit and electric shock can be caused besides polluting a product being welded, so that the response speed of water-break emergency operation is particularly important when the water channel failure occurs. In the prior art, a mode of feeding back faults and issuing a water-break control instruction by depending on a water-gas control unit of a welding system is required, and the requirement of emergency quick response cannot be met obviously.
The inventor of the invention aims at the requirement that the waterway fault cannot be responded quickly in the prior art, improves the structure and the working process of the existing welding water vapor control unit and the welding system, so as to realize that the welding water vapor control unit connected with each welding robot can realize the quick and reliable shutoff of the waterway without depending on the water vapor bus control unit of the welding system, and meet the requirement of quick response in emergency.
The embodiment of the invention provides a welding water vapor control unit and a welding system, which are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, a welding water vapor control unit provided in an embodiment of the present invention includes: the water-saving device comprises a safety relay, a waterway abnormality detection device and a water-break control electromagnetic valve, wherein the waterway abnormality detection device and the water-break control electromagnetic valve are electrically connected with the safety relay;
the safety relay is used for receiving a water-break control signal of the control host and/or a waterway abnormality detection signal of the waterway abnormality detection device, and controlling the water-break electromagnetic valve to lose electricity so as to enable the waterway of the welding robot connected with the welding water-gas control unit to be turned off.
In the embodiment of the invention, the control host is equipment for actively controlling the welding water-gas control unit, and the control host can actively control the on-off of water and gas used in the welding process by utilizing a man-machine interaction mode, such as a man-machine interaction interface or a traditional button mode, so as to ensure the normal running and stopping of the welding process.
In the embodiment of the invention, the safety relay is formed by combining a plurality of relays and circuits, can complement the abnormal defects of each other, achieves the functions of correct and low misoperation, can perform regular actions when faults occur in the safety relay, has a forced guiding contact structure, and can ensure safety even if contact sintering occurs, which is completely different from the common relay.
The safety relay comprises two signal channels, and can work normally only when signals of the two channels are normal; in the working process, as long as the signal of any channel is disconnected, the safety relay can stop outputting until the signals of the two channels are normal and reset, and then the safety relay can not work normally.
An example of an electrical schematic diagram of a safety relay is shown with reference to fig. 2, wherein CH1/CH2 are respectively 2 signal channels of the safety relay, and when the two signal channels are simultaneously powered, the normally open contact of the safety relay is on, and the normally closed contact is off. Three pairs of normally open contacts, identified as 13/14, 23/24, 33/34 in fig. 3 are safety relays, and 41/42 is a pair of normally closed contacts.
In the embodiment of the invention, the control host and the waterway abnormality detection device are connected to any one of two signal channels of the safety relay, or the control host and the waterway abnormality detection device are respectively connected to different channels of the two channels; by the design, if the signal of active water interruption of the control host is received or the water channel abnormality detection signal sent by the water channel abnormality detection device is received, any one of the two signal channels or the two channels can be disconnected by power failure.
The water-break electromagnetic valve is connected to the normally open contact of the safety relay, and when any one of the two signal channels or the two channels of the safety relay is disconnected, the connected water-break electromagnetic valve is powered off and closed by the action of the safety relay so as to shut off the waterway.
When the welding procedure is started normally under the condition that the waterway is normal, or when the waterway is recovered to a normal state from an abnormal state, the safety relay is further used for receiving a normal water supply control signal sent by the control host and a waterway normal detection signal sent by the waterway abnormal detection device, and controlling the normally open contact to be connected, and the water-break electromagnetic valve is opened by electricity, so that the waterway of the welding robot connected with the welding water-gas control unit is connected.
In one or more possible embodiments, the welding water vapor control unit may further include an intermediate relay between the safety relay and the waterway abnormality detection device; wherein:
the two normally open contacts of the intermediate relay are respectively connected with the signal output end of the waterway abnormality detection device and any channel of the safety relay, so that the intermediate relay receives the water-break control signal sent by the waterway abnormality detection device, the two normally open contacts are controlled to be disconnected, and the corresponding channel of the safety relay is powered off and disconnected.
The intermediate relay can play a role of converting a switch signal, such as a high-level signal or a low-level signal sent by the water flow detection switch, and is converted into a corresponding low level or high level according to the working principle of the safety relay, so that the safety relay can trigger a corresponding action according to the converted signal.
In one or more possible embodiments, the waterway abnormality detection device may be a plurality of devices disposed at different positions for monitoring different parameters of the circulating water system, so as to monitor waterway faults. These devices may alternatively be used or multiple devices may be used in addition.
For example, the waterway abnormality detection device may be a water flow detection switch mounted on a water supply pipe, a water pressure detection switch mounted on a water return pipe, a waterway circulation system water pump current detection switch, or the like.
Correspondingly, the detection modes are also various, when the faults such as pipeline burst and electrode cap adhesion and falling occur, the flow of the water supply pipeline is rapidly increased to exceed the action limit value of the water flow detection switch, and the water flow detection switch is triggered to output a waterway abnormality detection signal;
or when the faults of burst of the pipeline and adhesion and falling of the electrode cap occur, the water inflow amount is suddenly increased, the water return amount is suddenly reduced, a water pressure detection switch arranged on a water return pipeline of the water circulation system can detect the sudden reduction of the water inflow water pressure and the water return water pressure, and if the water pressure exceeds a preset action (or output) threshold value, the water pressure detection switch is triggered to output a waterway abnormality detection signal;
or when the pipeline bursts and the electrode cap is adhered and falls off, the load of the water pump supplying water suddenly drops, so that the current detection switch arranged on the water pump detects the sudden drop of the motor current in the pump, is lower than a preset current threshold value, and triggers the current detection switch to output a waterway abnormality detection signal and the like. Those skilled in the art will appreciate that there are many other ways of detecting waterway anomalies and corresponding detecting devices, and the present invention is not limited to the above-described ways.
If the plurality of waterway abnormality detection devices operate simultaneously, the signal output ends of the waterway abnormality detection devices may be connected to one signal channel of the safety relay or may be respectively disposed on different signal channels, which is not limited in the embodiment of the present invention.
On an industrial production line, a welding system is used as a whole, all welding robots are in a cooperative working relationship, when a welding water-gas control unit connected with a certain welding robot breaks a water path of the welding robot, the welding work is stopped, and for other welding robots which have not had water path faults, if the welding robots are positioned at adjacent stations, potential safety hazards can also occur due to sudden splashing of water or in a process with higher relevance, the welding process of the welding robots can also need to be correspondingly suspended, so that production accidents are avoided. Based on this, in one or more embodiments of the present invention, the welding water vapor control unit provided in the embodiment of the present invention, as shown in fig. 1, may further include: a bus unit and an input module;
the bus unit and the input module are connected with the signal output end of the waterway abnormality detection device and are used for sending the waterway abnormality detection signal output by the waterway abnormality detection device to the overall water-gas control unit of the welding system.
In one or more embodiments, referring to fig. 1, the welding water vapor control unit may further include: the output module is connected with the safety relay; the output module is used for receiving a water cut-off control signal sent by an overall water-gas control unit of the welding system and transmitting the water cut-off control signal to the safety relay;
in the example shown in fig. 1, the output module does not directly communicate with the overall water vapor control unit, but receives the water cut-off control signal sent by the external overall water vapor control unit through the bus unit.
The safety relay is also used for controlling the power failure of the water-break electromagnetic valve according to the water-break control signal sent by the overall water-gas control unit.
The bus unit and the input module can realize that after the waterway abnormal signal detected by the welding water vapor control unit rapidly and automatically controls water break, the waterway abnormal signal detected by the welding water vapor control unit is transmitted to the overall water vapor control unit of the welding system in time, and the overall water vapor control unit judges whether the water break control signal needs to be sent to the welding water vapor control unit in the working area or other working areas related to the working area according to the arrangement of the working point or the working area with the working area, and sends the corresponding water break control signal to the welding water vapor control unit needing to stop the welding operation in order to halt the welding process of the welding robot.
Based on this, even if a welding water vapor control unit of a welding robot, for example, the welding robot B, does not receive a self waterway abnormality detection signal or an active water cut-off signal sent by a control host, if a water cut-off control signal sent by an overall water vapor control unit is received (for example, an automatic water cut-off operation occurs in an adjacent welding robot a), a safety relay in the welding water vapor control unit of the welding robot B controls a local water cut-off solenoid valve to lose power according to the water cut-off control signal sent by the overall water vapor control unit.
In order to better illustrate the structure and operation of the weld moisture control unit provided by the embodiments of the present invention, a specific example is described below.
As shown in fig. 3, an electrical control box 7 is provided on the weld moisture control unit.
Fig. 4 is a schematic view of the inside of the electric control box, the main components of which include a safety relay 10, an intermediate relay 11 and a terminal block 12.
Fig. 5 is a schematic diagram of the electrical connection between the safety relay and the water flow detection switch, and the intermediate relay.
Referring to fig. 3 to 5, a CH1 channel is formed between S52/S22 of the safety relay, an output unit is connected to S52/S22 of the safety relay, and the other end is connected to a control host (not shown in the drawings); the water flow detection switch is also connected to the S52/S22, namely the CH1 channel, of the safety relay through the intermediate relay. The water-break electromagnetic valve 8 is connected to a 23/24 normally open contact, and the water-break electromagnetic valve 9 is connected to a 33/34 normally open contact. The water-break electromagnetic valve 8 and the water-break electromagnetic valve 9 are respectively arranged on a water inlet pipeline and a water return pipeline of the circulating water system. The water supply interface 5 and the water return interface 6 are respectively connected with a water supply pipeline and a water return pipeline of the welding robot.
The working process of the welding water vapor control unit is described below with reference to the accompanying drawings:
the control of the welding system to the water-break electromagnetic valve 8 and the water-break electromagnetic valve 9 is divided into two paths of normal active water-break and abnormal passive water-break, and the specific flow is briefly described as follows:
1. under the condition that the waterway is normal, the active shutdown control flow sent by the control host is as follows:
control host computer, bus unit 3, output module 2, safety relay 10, water-break solenoid valve 8 and water-break solenoid valve 9;
the control host outputs an active shutdown control signal, such as a DY D00 signal (for example, low level) in fig. 5, and the active shutdown control signal reaches the safety relay 10 through the bus unit 3 and the output module 2, and a CH1 channel of the safety relay 10 is opened to cause the water-break electromagnetic valve 8 and the water-break electromagnetic valve 9 to be in power-off disconnection and the waterway to be closed.
The control host actively shuts down the waterway, thereby providing convenience for normal maintenance and normal replacement of the welding gun head.
2. The abnormal passive water-break control flow caused by the falling off of the electrode cap or the pipe explosion of the waterway is as follows:
the electrode cap is separated or burst, the water flow switch 4, the relay 11, the safety relay 10, the water cut-off valve 8 and the water cut-off electromagnetic valve 9;
as shown in FIG. 5, the key of the two-way water-break control is that the power supply of the safety relay CH1 channel S52/S22 is controlled, the DY D00 signal given by the main machine is high level when the water vapor normally operates in the welding process, the signal given by the water flow switch 4 is also high level, at the moment, the CH1 and CH2 channels are all connected, the normally open contacts of the 23/24 and 33/34 connected water-break electromagnetic valves are closed, the water-break electromagnetic valve 8 and the water-break electromagnetic valve 9 are opened, and the waterway is connected.
When the control host actively cuts off water, DY D00 signals transmitted by the control host become low-level signals, the voltage between S52/S22 disappears, the CH1 channel is disconnected, the pair of normally open contacts 23/24 and 33/34 originally connected with the safety relay are disconnected, the water-break electromagnetic valve 8 and the water-break electromagnetic valve 9 lose power, and the waterway is disconnected. From the emergency passive water-break flow, from the generation of the waterway abnormality detection signal triggering the water-break to the completion of the water-break, the flow only needs to pass through 4 steps, the response speed is greatly improved, and the emergency water-break requirement is met.
When the electrode cap falls off or tube burst occurs, the abrupt increase of the water flow of the water inlet loop exceeds the action set value of the water flow switch 4 due to abnormal passive water interruption, the water flow switch acts, the output signal of the water flow switch changes from high level to low level, the coil of the relay 11 loses voltage, the normally open contacts 8/12 of the relay are disconnected, the voltage between S52/S22 disappears, the CH1 channel is disconnected, the normally connected pair of normally open contacts 23/24 and 33/34 of the safety relay are disconnected, the water interruption electromagnetic valve 8/9 loses power, and the waterway is disconnected.
The improved welding water vapor control unit provided by the embodiment of the invention has the advantages that the response speed of the welding water vapor control unit to water failure and water break of the waterway can be within 1s, and the potential safety hazard that water break cannot be timely carried out in the welding process is greatly avoided. Compared with the traditional mode of overall control by the water-gas bus control unit, the response efficiency can be improved by 300 percent (the response efficiency is reduced from 3s to 1 s).
Based on the improved welding water vapor control unit, the embodiment of the invention also provides an improved welding system, which is shown in fig. 6, and includes: at least two welding robots 601 and at least two welding moisture control units 602 as described in the previous embodiments;
the welding water vapor control units 602 are respectively connected with the welding robot 601.
In the embodiment of the present invention, the welding water vapor control unit 602 may control one welding robot singly or may control a plurality of welding robots simultaneously, and accordingly, the electrical connection relationships thereof are different, and the connection relationship thereof may be changed according to specific requirements during implementation.
Referring to the welding system shown in fig. 6, further comprising: a general water gas control unit 603; wherein the overall water vapor control unit 603 is respectively connected with each welding water vapor control unit 602;
the overall water-gas control unit 603 is configured to monitor signals sent by the welding water-gas control units 602, determine a working area where the welding robot 601 connected to the welding water-gas control unit 602 is located if a waterway abnormality detection signal output by the welding water-gas control unit 602 is received, and determine whether to send a water-break control signal to the welding water-gas control unit in the working area or other working areas associated with the working area according to the working area;
the welding water vapor control unit is further configured to control the self-water-break electromagnetic valve to lose power if receiving the water-break control signal sent by the overall water vapor control unit 603.
Based on the same inventive concept, the embodiment of the invention also provides a method for welding by using the welding water vapor control unit, and in the welding process, if a water cut-off control signal of the control host and/or a water way abnormality detection signal of the water way abnormality detection device are received, the water cut-off electromagnetic valve is controlled to lose electricity, so that the water way of the welding robot connected with the welding water vapor control unit is turned off.
The welding water vapor control unit, the welding system and the related method provided by the embodiment of the invention are improved, the safety relay is arranged in the welding water vapor control unit, and the safety relay is designed to trigger the water-break electromagnetic valve to cut off power immediately when receiving the active water-break control signal or the waterway abnormality detection signal, so that the automatic water-break is realized in emergency under the condition that the electrode cap falls off or the pipe bursts, the water-break efficiency is improved without sending a control instruction through the overall water vapor control unit of the welding system, the occurrence probability of product pollution and electric shock accidents is greatly reduced, and the production safety is ensured. In addition, the safety relay for automatically controlling the water interruption and the waterway abnormality detection device for detecting the water interruption are arranged together, the physical distance between the safety relay and the waterway abnormality detection device is relatively short, the signal transmission distance is shortened, and the overhaul is convenient.
According to the embodiment of the invention, after the welding water vapor control unit controls the water break of the welding water vapor control unit, the water passage abnormality detection signal is sent to the overall water vapor control unit of the welding system, so that the overall water vapor control unit can determine whether to cut off the water passage of other welding robots in the same or adjacent areas based on the arrangement of all working points in the production line, and when a certain welding robot has the condition that an electrode cap falls off or a pipe bursts, on one hand, the local water passage can be cut off in time, the normal welding process is suspended, the safety accident is avoided, and on the other hand, the synergy among all the working points on the production line is ensured.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A weld moisture control unit, comprising:
the water-saving device comprises a safety relay, a waterway abnormality detection device and a water-break control electromagnetic valve, wherein the waterway abnormality detection device and the water-break control electromagnetic valve are electrically connected with the safety relay;
the safety relay is used for receiving a water-break control signal of the control host and/or a waterway abnormality detection signal of the waterway abnormality detection device, and controlling the water-break electromagnetic valve to lose electricity so as to enable the waterway of the welding robot connected with the welding water-gas control unit to be turned off.
2. The welding water vapor control unit of claim 1, wherein the safety relay comprises two signal channels, the control host and the waterway abnormality detection device are connected to either one of the two signal channels, or the control host and the waterway abnormality detection device are respectively connected to different ones of the two signal channels;
the water-break electromagnetic valve is connected to a normally open contact of the safety relay;
the safety relay is used for receiving a water-break control signal and/or a waterway abnormality detection signal, controlling the corresponding channel to be powered off and disconnected, and the normally open contact is disconnected.
3. The welding water vapor control unit according to claim 2, wherein the safety relay is further configured to control the normally open contact to be turned on when receiving a normal water supply control signal sent by the control host and a water path normal detection signal sent by the water path abnormality detection device, and the water cut-off solenoid valve is electrically opened to turn on a water path of the welding robot connected to the welding water vapor control unit.
4. The weld moisture control unit of claim 1, further comprising: an intermediate relay arranged between the safety relay and the waterway abnormality detection device;
the two normally open contacts of the intermediate relay are respectively connected with the signal output end of the waterway abnormality detection device and any channel of the safety relay, so that the intermediate relay receives the water break control signal sent by the waterway abnormality detection device, the two normally open contacts are controlled to be disconnected, and the corresponding channel of the safety relay is powered off and disconnected.
5. The weld water control unit of any one of claims 1-4, wherein the waterway anomaly detection device comprises a combination of any one or more of:
the water flow detection switch is arranged on the water supply pipeline, the water pressure detection switch is arranged on the water return pipeline, and the water pump current detection switch is arranged on the waterway circulating system.
6. The weld moisture control unit of any of claims 1-4, further comprising: a bus unit and an input module;
the bus unit and the input module are connected with the signal output end of the waterway abnormality detection device and are used for sending the waterway abnormality detection signal output by the waterway abnormality detection device to the overall water-gas control unit of the welding system.
7. The weld moisture control unit of any of claims 1-4, further comprising: the output module is connected with the safety relay; the output module is used for receiving a water cut-off control signal sent by an overall water-gas control unit of the welding system and transmitting the water cut-off control signal to the safety relay;
the safety relay is also used for controlling the power failure of the water-break electromagnetic valve according to the water-break control signal sent by the overall water-gas control unit.
8. A welding system, comprising: a control host, at least two welding robots, at least two welding moisture control units as claimed in any one of claims 1-7;
the welding water vapor control units are respectively connected with the welding robot;
the control host is connected with the welding water vapor control unit.
9. The welding system of claim 8, further comprising: an overall water gas control unit; the overall water-gas control units are respectively connected with the welding water-gas control units;
the overall water-gas control unit is used for monitoring signals sent by the welding water-gas control units, determining a working area where the welding robot connected with the welding water-gas control unit is located if a waterway abnormality detection signal output by the welding water-gas control unit is received, and judging whether a water-break control signal needs to be sent to the welding water-gas control unit in the working area or other working areas associated with the working area according to the working area;
the welding water-gas control unit is also used for controlling the power failure of the self water-cut electromagnetic valve if the water-cut control signal sent by the overall water-gas control unit is received.
10. A method of welding using the weld moisture control unit of any of claims 1-7, comprising:
in the welding process, if a water-break control signal of the control host and/or a water-way abnormality detection signal of the water-way abnormality detection device are received, the water-break electromagnetic valve is controlled to lose electricity, so that a water way of the welding robot connected with the welding water-gas control unit is turned off.
CN202111357050.1A 2021-11-16 2021-11-16 Welding water vapor control unit, welding system and related method Pending CN116135417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111357050.1A CN116135417A (en) 2021-11-16 2021-11-16 Welding water vapor control unit, welding system and related method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111357050.1A CN116135417A (en) 2021-11-16 2021-11-16 Welding water vapor control unit, welding system and related method

Publications (1)

Publication Number Publication Date
CN116135417A true CN116135417A (en) 2023-05-19

Family

ID=86334146

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111357050.1A Pending CN116135417A (en) 2021-11-16 2021-11-16 Welding water vapor control unit, welding system and related method

Country Status (1)

Country Link
CN (1) CN116135417A (en)

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