Detection and protection system and method for double valves of press
阅读说明：本技术 压力机双联阀检测保护系统和方法 (Detection and protection system and method for double valves of press ) 是由 王叶军 于 2020-06-30 设计创作，主要内容包括：本发明提供了一种压力机双联阀检测保护系统和方法,其中,压力机双联阀包括两路开关,所述系统包括：检测单元,检测单元分别与两路开关相连,检测单元用于检测两路开关在限定时间内的开闭状态,并根据开闭状态判断两路开关在限定时间内是否完成同步动作,若两路开关在限定时间内完成同步动作,则通过第一通道输出相应信号,反之则通过第二通道输出相应信号；报警单元和保护单元,报警单元和保护单元均与检测单元相连,以用于在两路开关超过限定时间未完成同步动作时进行报警和停机。本发明能够及时有效判断出压力机双联阀是否故障,并在压力机双联阀故障时报警并快速停止压力机,从而能够保证压力机的工作安全。(The invention provides a detection and protection system and a method for a duplex valve of a press machine, wherein the duplex valve of the press machine comprises two switches, and the system comprises: the detection unit is respectively connected with the two switches and is used for detecting the opening and closing states of the two switches within the limited time and judging whether the two switches complete synchronous action within the limited time according to the opening and closing states, if the two switches complete synchronous action within the limited time, a corresponding signal is output through the first channel, otherwise, a corresponding signal is output through the second channel; the alarm unit and the protection unit are connected with the detection unit and are used for alarming and stopping when the two switches exceed the limited time and do not finish synchronous action. The invention can effectively judge whether the duplex valve of the press machine is in fault in time, and alarm and quickly stop the press machine when the duplex valve of the press machine is in fault, thereby ensuring the working safety of the press machine.)
1. The utility model provides a press double valve detects protection system, its characterized in that, press double valve includes two tunnel switches, drive two tunnel through inside connecting rod device during press double valve action the switch moves simultaneously, it includes to detect protection system:
the detection unit is respectively connected with the two switches, and is used for detecting the opening and closing states of the two switches within a limited time, judging whether the two switches complete synchronous action within the limited time according to the opening and closing states, outputting a corresponding signal through a first channel if the two switches complete synchronous action within the limited time, and outputting a corresponding signal through a second channel if the two switches do not complete synchronous action after exceeding the limited time;
the alarm unit is connected with the detection unit and is used for giving an alarm when the two paths of switches exceed the limited time and do not finish synchronous action;
and the protection unit is connected with the detection unit and is used for controlling the shutdown of the press machine when the two paths of switches exceed the limited time and still do not finish the synchronous action.
2. The press double valve detection and protection system according to claim 1, wherein the detection unit comprises:
the first port and the second port of the decoder are respectively and correspondingly connected to a detection power supply through the two paths of micro switches, the third port, the sixth port and the sixteenth port of the decoder are connected to the detection power supply, and the fourth port, the fifth port and the eighth port of the decoder are all grounded;
one end of the capacitor is connected to the detection power supply, and the other end of the capacitor is grounded;
a cathode of the first diode is connected with a twelfth port of the decoder;
a cathode of the second diode is connected with a thirteenth port of the decoder;
a cathode of the third diode is connected with a fourteenth port of the decoder;
a cathode of the fourth diode is connected with a fifteenth port of the decoder;
one end of the input side of the first optical coupling switch is connected with the anodes of the second diode and the third diode respectively;
one end of the input side of the second optical coupling switch is connected with the anodes of the first diode and the fourth diode respectively;
one end of the first resistor is connected with the other end of the input side of the first optocoupler switch, and the other end of the first resistor is connected to the detection power supply;
and one end of the second resistor is connected with the other end of the input side of the second optocoupler switch, and the other end of the second resistor is connected to the detection power supply.
3. The detection and protection system for the double valve of the press machine as claimed in claim 2, wherein the twelfth and fifteenth ports of the decoder form the first channel, the first channel is used for outputting corresponding signals generated by the decoder when the two switches complete synchronous action within a limited time, the thirteenth and fourteenth ports of the decoder form the second channel, and the second channel is used for outputting corresponding signals generated by the decoder when the two switches do not complete synchronous action beyond the limited time.
4. The detection and protection system for the double valve of the press machine as claimed in claim 3, wherein the limited time is a time threshold value when the double valve of the press machine does not perform synchronous actions and no safety accident occurs.
5. The press double valve detection and protection system of claim 4, wherein the synchronous action comprises a synchronous closing and a synchronous opening.
6. The detection and protection system for the double valve of the press machine as claimed in claim 5, wherein the alarm unit comprises an alarm signal lamp, a time relay and an intermediate relay, wherein one side of a coil of the time relay is connected with one end of an output side of the first optical coupling switch, the other side of the coil of the time relay is connected with a negative electrode of an alarm power supply, the other end of the output side of the first optical coupling switch is connected with a positive electrode of the alarm power supply, one end of a contact of the time relay is respectively connected with one side of the coil of the intermediate relay and one end of the alarm signal lamp, the other end of the contact of the time relay is connected with the positive electrode of the alarm power supply, the other side of the coil of the intermediate relay is connected with the negative electrode of the alarm power supply, one end of the contact of the intermediate relay is connected with one end, the other end of the contact of the intermediate relay is connected with the anode of the alarm power supply, and the other end of the alarm signal lamp is connected with the cathode of the alarm power supply.
7. The detection and protection system for the double valve of the press machine as claimed in claim 6, wherein the protection unit comprises a protection switch, one end of the protection switch is connected with one end of the output side of the second optical coupling switch, the other end of the output side of the second optical coupling switch is connected to a protection power supply, and the other end of the protection switch is connected to a control circuit of the press machine.
8. The press double valve detection protection system of claim 7, wherein the decoder is a type 74LS138P decoder.
9. A detection and protection method for a duplex valve of a press machine is disclosed, wherein the duplex valve of the press machine comprises two switches, and the two switches are driven to simultaneously act through an internal connecting rod device when the duplex valve of the press machine acts, and the method comprises the following steps:
detecting the opening and closing states of the two paths of switches within a limited time;
judging whether the two paths of switches complete synchronous actions within a limited time according to the opening and closing states;
if the two switches complete synchronous action within the limited time, outputting corresponding signals through a first channel;
if the two switches do not complete synchronous action after exceeding the limited time, outputting corresponding signals through a second channel, and alarming and controlling the press machine to stop.
10. The detection and protection method for the double valve of the press machine as claimed in claim 9, wherein the limited time is a time threshold value when the double valve of the press machine does not perform synchronous actions and no safety accident occurs.
Technical Field
The invention relates to the technical field of synchronous detection, in particular to a detection and protection system and a detection and protection method for a duplex valve of a press machine.
Background
At present, a double-linkage valve of a pneumatic press is a core component of the press, particularly an electric and mechanical related linkage component, and can be used for controlling all actions of the press. During normal operation, the double valves of the double valves are synchronous to control the operation of the press machine in a matching way, but if the double valves of the double valves are asynchronous during operation, the problem can occur no matter the press machine is opened or closed, so that safety accidents can be caused.
Therefore, it can be seen that it is very important to know the working state of the double valve in time and stop the press in time when the double valve is out of synchronization in the working process of the press. However, when detecting the operating state of the double valve, the judgment is usually performed by detecting the air inlet and outlet amount of the double valve, and not only the structure of the detection device is complicated, but also the operation sensitivity is low.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, one object of the present invention is to provide a detection and protection system for a duplex valve of a press machine, which can effectively determine whether the duplex valve of the press machine has a fault by detecting whether two switches are synchronous, and alarm and quickly stop the press machine when the duplex valve of the press machine has a fault, so as to ensure the working safety of the press machine, and meanwhile, the system has a simple structure, is convenient to install, and has high action sensitivity.
The invention also provides a detection and protection method for the double valve of the press.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a detection and protection system for a duplex valve of a press machine, where the duplex valve of the press machine includes two switches, and when the duplex valve of the press machine operates, the two switches are driven by an internal link device to operate simultaneously, and the detection and protection system includes: the detection unit is respectively connected with the two switches, and is used for detecting the opening and closing states of the two switches within a limited time, judging whether the two switches complete synchronous action within the limited time according to the opening and closing states, outputting a corresponding signal through a first channel if the two switches complete synchronous action within the limited time, and outputting a corresponding signal through a second channel if the two switches do not complete synchronous action after exceeding the limited time; the alarm unit is connected with the detection unit and is used for giving an alarm when the two paths of switches exceed the limited time and do not finish synchronous action; and the protection unit is connected with the detection unit and is used for controlling the shutdown of the press machine when the two paths of switches exceed the limited time and still do not finish the synchronous action.
According to the detection and protection system for the duplex valve of the press, which is provided by the embodiment of the invention, the two switches are connected through the detection unit and are used for detecting the opening and closing states of the two switches within the limited time, whether the two switches synchronously act within the limited time is judged according to the opening and closing states, if the two switches synchronously act within the limited time, a corresponding signal is output through the first channel, if the two switches do not synchronously act within the limited time, a corresponding signal is output through the second channel, and the alarm unit and the protection unit are respectively connected with the detection unit and are used for alarming and controlling the press to stop when the two switches do not synchronously act within the limited time, so that whether the duplex valve of the press breaks down can be effectively judged in time through detecting whether the two switches are synchronous, and alarming and quickly stopping the press when the duplex valve of the press breaks down, therefore, the working safety of the press machine can be ensured, and meanwhile, the press machine is simple in structure, convenient to install and high in action sensitivity.
In addition, the double valve detection and protection system for the press according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the detection unit comprises: a first port and a second port of the decoder are respectively and correspondingly connected to a detection power supply through the two switches, a third port, a sixth port and a sixteenth port of the decoder are connected to the detection power supply, and a fourth port, a fifth port and an eighth port of the decoder are all grounded; one end of the capacitor is connected to the detection power supply, and the other end of the capacitor is grounded; a cathode of the first diode is connected with a twelfth port of the decoder; a cathode of the second diode is connected with a thirteenth port of the decoder; a cathode of the third diode is connected with a fourteenth port of the decoder; a cathode of the fourth diode is connected with a fifteenth port of the decoder; one end of the input side of the first optical coupling switch is connected with the anodes of the second diode and the third diode respectively; one end of the input side of the second optical coupling switch is connected with the anodes of the first diode and the fourth diode respectively; one end of the first resistor is connected with the other end of the input side of the first optocoupler switch, and the other end of the first resistor is connected to the detection power supply; and one end of the second resistor is connected with the other end of the input side of the second optocoupler switch, and the other end of the second resistor is connected to the detection power supply.
Furthermore, the twelfth port and the fifteenth port of the decoder form the first channel, the first channel is configured to output corresponding signals generated by the decoder when the two switches complete the synchronous action within the limited time, the thirteenth port and the fourteenth port of the decoder form the second channel, and the second channel is configured to output corresponding signals generated by the decoder when the two switches do not complete the synchronous action after exceeding the limited time.
According to one embodiment of the invention, the limited time is a time threshold value when the double valves of the press do not act synchronously and no safety accident occurs.
According to one embodiment of the invention, the synchronization action comprises a synchronization close and a synchronization open.
According to one embodiment of the invention, the alarm unit comprises an alarm signal lamp, a time relay and an intermediate relay, wherein one side of a coil of the time relay is connected with one end of the output side of the first optical coupling switch, the other side of the coil of the time relay is connected with a negative electrode of an alarm power supply, the other end of the output side of the first optical coupling switch is connected with a positive electrode of the alarm power supply, one ends of contacts of the time relay are respectively connected with one side of the coil of the intermediate relay and one end of the alarm signal lamp, the other end of the contact of the time relay is connected with the positive electrode of the alarm power supply, the other side of the coil of the intermediate relay is connected with the negative electrode of the alarm power supply, one end of the contact of the intermediate relay is connected with one end of the alarm signal lamp, and the other end of the contact of the intermediate relay, the other end of the alarm signal lamp is connected with the negative electrode of the alarm power supply.
According to one embodiment of the invention, the protection unit comprises a protection switch, one end of the protection switch is connected with one end of the output side of the second optical coupling switch, the other end of the output side of the second optical coupling switch is connected to a protection power supply, and the other end of the protection switch is connected to a control circuit of the press machine.
According to one embodiment of the invention, the decoder selects a decoder model 74LS 138P.
In order to achieve the above object, a second aspect of the present invention provides a method for detecting and protecting a dual valve of a press, where the dual valve of the press includes two switches, and the two switches are driven by an internal link device to simultaneously operate when the dual valve of the press operates, and the method includes the following steps: detecting the opening and closing states of the two paths of switches within a limited time; judging whether the two paths of switches complete synchronous actions within a limited time according to the opening and closing states; if the two switches complete synchronous action within the limited time, outputting corresponding signals through a first channel; if the two switches do not complete synchronous action after exceeding the limited time, outputting corresponding signals through a second channel, and alarming and controlling the press machine to stop.
According to the detection and protection method for the duplex valve of the press, provided by the embodiment of the invention, the opening and closing states of the two switches within the limited time are detected, whether the two switches complete synchronous action within the limited time can be judged according to the opening and closing states, finally, when the two switches complete synchronous action within the limited time, a corresponding signal is output through the first channel, and when the two switches exceed the limited time and do not complete synchronous action, a corresponding signal is output through the second channel, and the press is alarmed and controlled to stop, so that whether the duplex valve of the press breaks down can be effectively judged in time by detecting whether the two switches are synchronous, and the alarm is given and the press is rapidly stopped when the duplex valve of the press breaks down, so that the working safety of the press can be ensured, and the action sensitivity is high.
In addition, the method for detecting and protecting the double valve of the press according to the embodiment of the invention may further have the following additional technical features:
according to one embodiment of the invention, the limited time is a time threshold value when the double valves of the press do not act synchronously and no safety accident occurs.
Drawings
FIG. 1 is a block diagram of a press double check valve detection and protection system according to an embodiment of the invention;
FIG. 2 is a circuit diagram of a detection unit according to an embodiment of the present invention;
FIG. 3 is a pin diagram of a decoder according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of an alarm unit of one embodiment of the present invention;
FIG. 5 is a circuit diagram of a protection unit according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for detecting and protecting a double valve of a press according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the press double valve detection and protection system and method of the embodiment of the present invention function as a press double valve, and the press double valve includes two switches, and when the press double valve operates, the two switches may be driven by an internal link device to operate simultaneously, that is, the state of the press double valve may be reflected in real time by the operation of the two switches, and the press double valve detection and protection system and method of the embodiment of the present invention will be described below by taking an AD-SL231D-406D-M2-DD2 press double valve as an example, where the two switches in the AD-SL231D-406D-M2-DD2 press double valve are two micro switches.
As shown in fig. 1, the detection and protection system for the double valve of the press machine according to the embodiment of the invention comprises a detection unit 10, an alarm unit 20 and a protection unit 30. The detection unit 10 is respectively connected with the two switches, the detection unit 10 is used for detecting the open-close states of the two switches within a limited time, and judging whether the two switches complete the synchronous action within the limited time according to the open-close states, if the two switches complete the synchronous action within the limited time, a corresponding signal is output through a first channel, and if the two switches exceed the limited time and still do not complete the synchronous action, a corresponding signal is output through a second channel; the alarm unit 20 is connected with the detection unit 10, and the alarm unit 20 is used for giving an alarm when the two switches exceed the limited time and do not complete the synchronous action; the protection unit 30 is connected with the detection unit 10, and the protection unit 30 is used for controlling the press machine to stop when the synchronous action of the two switches is not completed within the limited time.
In one embodiment of the present invention, as shown in fig. 2, the detection unit 10 includes: the first port, the second port of the decoder, namely
The decoder may be a 74LS138P decoder, shown in fig. 3, whose function truth table is shown in table 1 below. Specifically, the 74LS138P decoder may decode the 2-ary signals from the input terminals A2, A1, and a0, and output low level signals through the corresponding 10-ary output terminals after decoding, for example, when one of the gates, i.e., the E1 terminal, is at a high level, and the other two gates, i.e., the E2 and the E3 terminals, are at a low level, the binary codes of the address terminals a0, A1, and A2 may be decoded at low levels at the corresponding output terminals Y0 to Y7, for example, when A2A1a0 is 110, the binary codes may output a low level through the Y6 terminal, where "1" is at a high level and "0" is at a low level.
TABLE 1
In an embodiment of the present invention, the twelfth and fifteenth ports of the decoder, that is, the pin 12 and the pin 15, may form a first channel, and may output corresponding signals generated by the decoder, that is, normal state signals, when the two switches complete synchronous actions within a limited time; in addition, the thirteenth and fourteenth ports of the decoder, i.e., pin No. 13 and pin No. 14, may form a second channel, and may output corresponding signals generated by the decoder, i.e., abnormal state signals, when the two switches have not completed synchronous actions after exceeding the limited time.
For example, when the two switches complete the synchronous operation within a limited time, for example, when the switches are synchronously turned off as shown in fig. 2,
When the two switches are not synchronized within a limited time, for example, the two switches are not synchronized to be disconnected, and the microswitch X0 is disconnected first, the
In one embodiment of the present invention, as shown in fig. 4, the alarm unit may include an alarm signal lamp HL1, a time relay KT and an intermediate relay KA, wherein one side of a coil KT of the time relay KT may be connected to one end of an output side of a first photo-coupler switch VD1, the other side of the coil KT of the time relay KT may be connected to a negative electrode of an alarm power source, i.e., a 0V terminal, the other end of the output side of the first photo-coupler switch VD1 is connected to a positive electrode of the alarm power source, i.e., +24V terminal, one end of a contact KT of the time relay KT is connected to one side of the coil KA of the intermediate relay KA and one end of the alarm signal lamp HL1, respectively, the other end of the contact KT of the time relay KT may be connected to a positive electrode of the alarm power source, i.e., +24V terminal, the other side of the coil KA of the intermediate relay KA may be connected, the other end of the contact KA of the intermediate relay KA can be connected to the positive pole of the alarm power supply, namely the +24V end, and the other end of the alarm signal lamp HL1 can be connected to the negative pole of the alarm power supply, namely the 0V end.
In an embodiment of the present invention, as shown in fig. 5, the protection unit 30 may include a protection switch SB1, one end of the protection switch SB1 is connected to one end of the output side of the second optical coupling switch VD2, the other end of the output side of the second optical coupling switch VD2 is connected to a protection power supply, i.e., a +24V terminal, and the other end of the protection switch SB1 is connected to a control circuit of the press. Through linking to each other protection switch and second opto-coupler switch, can carry out scram control to the press when detecting element output abnormal state signal.
Based on the circuits shown in fig. 4 and 5, the limited time can be set to be 0.3s, namely, the duplex valve of the press is not completed within 0.3s and is also determined to be in a normal state, and when the duplex valve of the press is not completed within 0.3s, the duplex valve of the press is determined to be in a fault state, therefore, when the duplex valve of the press is not completed in a synchronous manner, a fault signal output by the first optical coupling switch VD1 can be connected with the time relay KT, the time relay KT and the intermediate relay KA are screened, and if the duplex valve of the press is not completed within 0.3s, the contact KT and the contact KA are closed, so that the alarm signal lamp HL1 is powered on, meanwhile, the second optical coupling switch VD2 is not connected, the emergency stop control circuit of the press is disconnected, and the press is; if the double valves of the press machine finish synchronous action within 0.3s, the press machine works normally.
It should be noted that the above-mentioned limited time is a time threshold value at which no safety accident occurs when the dual valve of the press machine operates according to the relevant standard, and therefore, in order to avoid unnecessary alarm and emergency stop operation, the fault phenomenon can be delayed by the delay circuit.
According to the detection and protection system for the duplex valve of the press, which is provided by the embodiment of the invention, the two switches are connected through the detection unit and are used for detecting the opening and closing states of the two switches within the limited time, whether the two switches synchronously act within the limited time is judged according to the opening and closing states, if the two switches synchronously act within the limited time, a corresponding signal is output through the first channel, if the two switches do not synchronously act within the limited time, a corresponding signal is output through the second channel, and the alarm unit and the protection unit are respectively connected with the detection unit and are used for alarming and controlling the press to stop when the two switches do not synchronously act within the limited time, so that whether the duplex valve of the press breaks down can be effectively judged in time through detecting whether the two switches are synchronous, and alarming and quickly stopping the press when the duplex valve of the press breaks down, therefore, the working safety of the press machine can be ensured, and meanwhile, the press machine is simple in structure, convenient to install and high in action sensitivity.
The invention further provides a detection and protection method for the double valves of the press machine, which corresponds to the embodiment.
As shown in fig. 6, the method for detecting and protecting the double valve of the press according to the embodiment of the present invention includes the following steps:
and S1, detecting the opening and closing states of the two-way switch within a limited time.
And S2, judging whether the two-way switch completes synchronous action within a limited time according to the opening and closing state.
And S3, if the two switches complete synchronous action within the limited time, outputting corresponding signals through the first channel.
And S4, if the two switches do not complete synchronous action after exceeding the limited time, outputting corresponding signals through the second channel, and alarming and controlling the stop of the press machine.
In an embodiment of the invention, the detection unit may detect the open-close states of the two switches within a limited time, and determine whether the two switches complete the synchronous action within the limited time according to the open-close states.
Specifically, as shown in fig. 2, the on-off states of the two switches within the limited time can be detected through the
When the two switches are not synchronized within a limited time, for example, the two switches are not synchronized to be disconnected, and the microswitch X0 is disconnected first, the
Furthermore, a first channel can be formed according to the No. 12 pin and the No. 15 pin of the decoder, and corresponding signals generated by the decoder, namely normal output signals, can be output when the two switches complete synchronous actions within limited time; in addition, a second channel can be formed according to the No. 13 pin and the No. 14 pin of the decoder, and corresponding signals generated by the decoder, namely abnormal output signals, can be output when the two switches do not complete synchronous action after exceeding the limited time.
In one embodiment of the invention, the alarm unit can be used for alarming when the synchronous action of the two switches is not completed after the limited time. Specifically, as shown in fig. 4, the alarm unit may include an alarm signal lamp HL1, a time relay KT and an intermediate relay KA, wherein one side of a coil KT of the time relay KT may be connected to one end of an output side of a first photo-coupler switch VD1, the other side of the coil KT of the time relay KT may be connected to a negative electrode of an alarm power source, i.e., a 0V terminal, the other end of the output side of the first photo-coupler switch VD1 is connected to a positive electrode of the alarm power source, i.e., +24V terminal, one end of a contact KT of the time relay KT is connected to one side of a coil KA of the intermediate relay KA and one end of the alarm signal lamp HL1, the other end of the contact KT of the time relay KT may be connected to a positive electrode of the alarm power source, i.e., +24V terminal, the other side of the coil KA of the intermediate relay KA may be connected to a negative electrode, the other end of the contact KA of the intermediate relay KA can be connected to the positive pole of the alarm power supply, namely the +24V end, and the other end of the alarm signal lamp HL1 can be connected to the negative pole of the alarm power supply, namely the 0V end.
In one embodiment of the invention, the press machine can be controlled by the protection unit to scram when the two-way switch has not completed the synchronous action beyond a defined time. Specifically, as shown in fig. 5, the protection unit may be a protection switch SB1, one end of the protection switch SB1 is connected to one end of an output side of the second optical coupling switch VD2, the other end of the output side of the second optical coupling switch VD2 is connected to a protection power supply, i.e., a +24V terminal, and the other end of the protection switch SB1 is connected to a control circuit of the press.
Based on the circuits shown in fig. 4 and 5, the limited time can be set to be 0.3s, namely, the duplex valve of the press is not completed within 0.3s and is also determined to be in a normal state, and when the duplex valve of the press is not completed within 0.3s, the duplex valve of the press is determined to be in a fault state, therefore, when the duplex valve of the press is not completed in a synchronous manner, a fault signal output by the first optical coupling switch VD1 can be connected with the time relay KT, the time relay KT and the intermediate relay KA are screened, and if the duplex valve of the press is not completed within 0.3s, the contact KT and the contact KA are closed, so that the alarm signal lamp HL1 is powered on, meanwhile, the second optical coupling switch VD2 is not connected, the emergency stop control circuit of the press is disconnected, and the press is; if the double valves of the press machine finish synchronous action within 0.3s, the press machine works normally.
It should be noted that the above-mentioned limited time is a time threshold value at which no safety accident occurs when the dual valve of the press machine operates according to the relevant standard, and therefore, in order to avoid unnecessary alarm and emergency stop operation, the fault phenomenon can be delayed by the delay circuit.
According to the detection and protection method for the duplex valve of the press, provided by the embodiment of the invention, the opening and closing states of the two switches within the limited time are detected, whether the two switches complete synchronous action within the limited time can be judged according to the opening and closing states, finally, when the two switches complete synchronous action within the limited time, a corresponding signal is output through the first channel, and when the two switches exceed the limited time and do not complete synchronous action, a corresponding signal is output through the second channel, and the press is alarmed and controlled to stop, so that whether the duplex valve of the press breaks down can be effectively judged in time by detecting whether the two switches are synchronous, and the alarm is given and the press is rapidly stopped when the duplex valve of the press breaks down, so that the working safety of the press can be ensured, and the action sensitivity is high.
In the present invention, unless otherwise expressly specified or limited, the term "coupled" is to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：一种双点伺服压力机控制系统