CN217955694U - Point single-double-purpose alarm limit switch - Google Patents
Point single-double-purpose alarm limit switch Download PDFInfo
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- CN217955694U CN217955694U CN202220771815.XU CN202220771815U CN217955694U CN 217955694 U CN217955694 U CN 217955694U CN 202220771815 U CN202220771815 U CN 202220771815U CN 217955694 U CN217955694 U CN 217955694U
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Abstract
An embodiment of the utility model provides a single dual-purpose warning limit switch of point belongs to circuit fault detection field. The single-point and double-purpose alarm limit switch comprises: the first secondary limit switch and the second secondary limit switch are connected in parallel; the first secondary limit switch and the second secondary limit switch are respectively connected with an alarm circuit, and the two alarm circuits share one alarm; the alarm is used for generating alarm information after the first secondary limit switch or the second secondary limit switch breaks down. The utility model discloses the scheme is under the prerequisite that does not increase the control point position, and is increasing a spacing constitution double spacing on single spacing basis, and damage in the double spacing will arouse the buzzer and report to the police. The added electric elements can be completed only by using the original single-limit circuit without adding a new circuit or changing a control system.
Description
Technical Field
The utility model relates to a circuit fault detection field specifically relates to a single dual-purpose warning limit switch of point.
Background
The limit switches are indispensable electronic elements of an automatic production line, are often used for detecting signals such as in-place mechanical signals and outputting switching value signals, and are very large in use number on a large-scale production line. Some production environments are especially heavy industry production lines, because the field environment is abominable, service conditions are complicated, limit switch has certain fault rate, especially have under the condition of higher requirement to production safety, and along with the improvement of degree of automation, the stability of equipment also requires more and more height, more and more places need two spacing cooperation alarm devices to guarantee that limit switch volume output can not appear causing the disappearance because of electronic component damages, in order to avoid the huge loss that probably brings, because full-automatic production line limit switch is just huge with regard to quantity originally, if all will make control system point location quantity double through control system operation control, cause control system load double, cause the cost to improve by a wide margin, especially go to increase control point location work load very big at ripe production line by a wide margin. Aiming at the problem that the existing limit switch fault detection scheme can not adapt to the parallel detection of a large number of limit switches, a new point single-double-purpose alarm limit switch needs to be created.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a point is single dual-purpose warning limit switch, this point is single dual-purpose warning limit switch has realized limit switch's trouble self-detection under the condition that does not increase the control point.
In order to achieve the above object, the embodiment of the utility model provides a point is single dual-purpose warning limit switch, point is single dual-purpose warning limit switch includes: the first secondary limit switch and the second secondary limit switch are connected in parallel; the first secondary limit switch and the second secondary limit switch are respectively connected with an alarm circuit, and the two alarm circuits share one alarm; the alarm is used for generating alarm information after the first secondary limit switch or the second secondary limit switch breaks down.
Optionally, the first secondary limit switch and the second secondary limit switch share a control output contact.
Optionally, the first secondary limit switch, the second secondary limit switch and the alarm share one power input.
Optionally, the alarm circuit of the first secondary limit switch includes: the first intermediate relay, the first alarm branch and the alarm are connected in series in sequence.
Optionally, the alarm circuit of the second secondary limit switch includes: the second intermediate relay, the second alarm branch and the alarm are sequentially connected in series.
Optionally, the first alarm branch includes: the first normally open contact and the first normally closed contact are connected in parallel; the first normally open contact and the first normally closed contact are normally open/normally closed contacts of the first intermediate relay.
Optionally, the second alarm branch includes: the second normally closed contact and the second normally open contact are connected in parallel; and the second normally open contact and the second normally closed contact are normally open/normally closed contacts of the second intermediate relay.
Optionally, the first alarm branch is connected in series with the second alarm branch.
Optionally, the first normally open contact is connected in series with the second normally closed contact; the first normally closed contact is connected with the second normally open contact in series.
Optionally, the alarm is a buzzer alarm.
Through the technical scheme, on the premise that the control point position is not increased, a limit is added on the basis of a single limit to form a double limit, the alarm is realized by adding the intermediate relay and the buzzer, if the double limits work normally, the alarm can not be given, and the buzzer is caused to give an alarm if one of the double limits is damaged. The added electric elements can be completed only by using the original single-limit circuit without adding a new circuit or changing a control system. When the limit switch fault detection is carried out, the control system is not required to carry out any processing operation, possible fault conditions are completely dealt based on the correspondingly designed circuit structure, and the correspondingly designed alarm circuit is switched on as long as the switch breaks down, so that the alarm is activated to generate alarm information.
Other features and advantages of embodiments of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments, but do not limit the embodiments. In the drawings:
fig. 1 is a schematic structural view of a point single-double-purpose alarm limit switch provided by an embodiment of the present invention.
Description of the reference numerals
1-a first secondary limit switch; 2-a second secondary limit switch; 3-a first intermediate relay; 4-a first normally open contact; 5-a first normally closed contact; 6-a second intermediate relay; 7-a second normally closed contact; 8-a second normally open contact; 9-alarm.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.
In the embodiments of the present invention, without the contrary explanation, the terms of orientation such as "upper, lower, left, and right" used herein generally refer to the orientation or position relationship shown in the drawings, or the orientation or position relationship that the utility model is usually placed when in use.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
The terms "horizontal", "vertical", "overhanging", and the like do not imply a requirement that the components be absolutely horizontal, vertical or overhanging, but may be somewhat inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
Furthermore, the terms "substantially", "essentially", and the like are intended to indicate that the relative terms are not required to be absolutely exact, but may have some deviation. For example: "substantially equal" does not mean absolute equality, but it is difficult to achieve absolute equality in actual production and operation, and certain deviations generally exist. Thus, in addition to absolute equality, "substantially equal" also includes the above-described case where there is some deviation. In this case, unless otherwise specified, terms such as "substantially", "essentially", and the like are used in a similar manner to those described above.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
The limit switches are indispensable electronic components of an automatic production line, are often used for detecting signals such as in-place mechanical signals and outputting switching value signals, and the number of the limit switches used is very large on a large-scale production line. Some production environments are especially heavy industry production lines, because the field environment is abominable, service conditions are complicated, limit switch has certain fault rate, especially have under the condition of higher requirement to production safety, and along with the improvement of degree of automation, the stability of equipment also requires more and more height, more and more places need two spacing cooperation alarm devices to guarantee that limit switch volume output can not appear causing the disappearance because of electronic component damages, in order to avoid the huge loss that probably brings, because full-automatic production line limit switch is just huge with regard to quantity originally, if all will make control system point location quantity double through control system operation control, cause control system load double, cause the cost to improve by a wide margin, especially go to increase control point location work load very big at ripe production line by a wide margin.
To the too big problem of increase control system burden and the upgrading cost that current limit switch fault detection scheme exists, the utility model discloses the scheme provides a new single dual-purpose warning limit switch of point, the single dual-purpose warning limit switch of point of this application scheme is under the prerequisite that does not increase the control point position, on single spacing basis in increasing a spacing two spacing constitution, and realize reporting to the police through the mode that increases auxiliary relay and bee calling organ, if all normally work, then can not report to the police, damage in the two spacing, will arouse bee calling organ to report to the police. The added electric elements can be completed only by using the original single-limit circuit without adding a new circuit or changing a control system. When the limit switch fault detection is carried out, the control system is not required to carry out any processing operation, possible fault conditions are completely dealt based on the correspondingly designed circuit structure, and the correspondingly designed alarm circuit is switched on as long as the switch breaks down, so that the alarm is activated to generate alarm information.
Referring to fig. 1, the present embodiment provides a point single/dual-purpose alarm limit switch, which includes: the two secondary limit switches are connected in parallel with a first secondary limit switch 1 and a second secondary limit switch 2; the first secondary limit switch 1 and the second secondary limit switch 2 are respectively connected with an alarm circuit; the alarm circuits of the first secondary limit switch 1 and the second secondary limit switch 2 share one alarm 9; the alarm 9 is used for generating alarm information after the first secondary limit switch 1 and/or the second secondary limit switch 2 breaks down.
The embodiment of the utility model provides an in, it is similar with the mode that conventional double-limit cooperation alarm device carries out limit switch malfunction alerting, the utility model discloses equally including two limit switch in the scheme, these two limit switch make up and are used for carrying out power input and cutting off to control system. However, different from the scheme that the conventional method needs to add a new control point, the utility model discloses the scheme incorporates a new limit switch on former single limit switch's return circuit to with the common alarm circuit who corresponds of design of former limit switch. When alarming, the judgment is not carried out according to the collected signals of the limit switches, and the judgment is carried out only by judging whether the corresponding alarm circuit is conducted, wherein the basis of the conduction of the alarm circuit is whether the two limit switches have faults. When any limit switch has a fault, the state of the intermediate relay on the corresponding alarm circuit is fixed, and then the relay of another alarm circuit continuously changes the state, so that the alarm circuit is switched on at a certain node, and the alarm is triggered. Therefore, the corresponding alarm circuit is expanded based on the original circuit, signal acquisition and interaction control points do not need to be added, and each limit switch operates as an independent word fault detection unit. When the built production line is expanded, the original production line control system does not need to be upgraded, and the method has obvious significance for stably operating the control system and controlling the expansion cost.
Preferably, the first secondary limit switch 1 and the second secondary limit switch 2 share a control output contact.
The embodiment of the utility model provides an in, first secondary limit switch 1 with a control output contact is shared to second secondary limit switch 2 is in order to realize limit switch's basic function, though increased a new limit switch, but this whole switch's effect can not change, if two control output contacts are different, will certainly lead to the fact the control effect and the condition of effect conflict in advance.
Preferably, the first secondary limit switch 1, the second secondary limit switch 2 and the alarm 9 share one power input.
In the embodiment of the present invention, as in the above, in order to realize the required performance of the limit switch itself, the power circuit corresponding to the control should be the same as that before the system expansion, and no matter there is any structural improvement, the new limit switch still macroscopically handles the input and output of the corresponding power circuit. Therefore, the first secondary limit switch 1 and the second secondary limit switch 2 share one power input, have the same function as the two secondary limit switches share one control output contact, and both meet the original function of the limit switches, thereby avoiding the error control of the limit switches after expansion. The alarm is also designed into a power input loop, and mainly, whether each limit switch is a small unit for independent fault detection or not is determined based on whether faults exist in the corresponding limit switches or not, and the small unit and the corresponding limit switches are designed into the same power loop, so that the two are guaranteed to have an association relation in power conduction, the need of designing a careful power supply can be avoided, and positive significance is realized in both alarm accuracy and system construction cost control.
Preferably, the alarm circuit of the first secondary limit switch 1 includes: the alarm comprises a first intermediate relay 3, a first alarm branch and the alarm 9 which are connected in series in sequence.
Preferably, the alarm circuit of the second secondary limit switch 1 includes: the second intermediate relay 6, the second alarm branch and the alarm 9 are connected in series in sequence.
The embodiment of the utility model provides an in, the principle of carrying out limit switch malfunction alerting does, and two secondary limit switches all are connected with an auxiliary relay and the warning branch road that corresponds, and when a certain secondary limit switch broke down, the warning circuit that corresponds secondary limit switch will break down equally, and the state of the auxiliary relay on this fault circuit will no longer change along with control signal and take place to switch, and another secondary limit switch still can change along with control signal at this moment and carry out the state switching. Under the condition that the state of the fault alarm circuit is fixed, the circuit of the normal alarm circuit is switched to a certain node state to enable the corresponding alarm branch circuit to be conducted, and therefore the power supply loop of the alarm is connected. And under the state that two limit switches all normally operate, the states of the two limit switches are always switched simultaneously, and the corresponding alarm branch circuit is used for being not conducted.
Preferably, the first alarm branch comprises: a first normally open contact 4 and a first normally closed contact 5 connected in parallel.
Preferably, the second alarm branch comprises: a second normally closed contact 7 and a second normally open contact 8 connected in parallel.
Preferably, the first judging branch is connected in series with the second judging branch.
Preferably, the first normally open contact 4 is connected in series with the second normally closed contact 7; the first normally closed contact 5 is connected with the second normally open contact 8 in series.
The embodiment of the utility model provides an in, the normally open contact of first judgement branch road concatenates with the normally closed contact of second judgement branch road, and the normally closed contact of first judgement branch road concatenates with the normally open contact of second judgement branch road again. When the two limit switches can normally operate, the intermediate relays corresponding to the two judgment branch circuits at the front end can simultaneously switch corresponding states along with the switching of the control signals, namely when the normally open contact of the first judgment branch circuit is switched on, the normally closed contact of the corresponding second judgment branch circuit is also switched off; when the normally closed contact of the first judgment branch is disconnected, the normally open contact of the corresponding second judgment branch is connected again. The first alarm branch and the second alarm branch are always in a disconnected state.
When a certain limit switch has a fault, for example, the first limit switch has a fault, the state of the first intermediate relay on the corresponding alarm circuit is not switched along with the control signal any more, that is, in the subsequent process, the state before the fault is continuously maintained, for example, the first normally closed contact is closed, and the first normally open contact is open. And the second limit switch still normally works, and before a fault occurs, corresponding to the state of the first alarm circuit, the state of the alarm branch of the second limit switch is that the second normally open contact is open and the second normally closed contact is closed. When the second intermediate relay is switched in state along with the control signal, the corresponding second normally open contact is closed, and the corresponding second normally closed contact is opened. This just makes the first normally closed contact and the concatenation return circuit of second normally open contact all become the closure to make the power supply circuit of alarm switched on, the alarm is triggered, thereby produces alarm information. Therefore, the fault self-recognition of the limit switch can be realized by combining the normally open contacts and the normally closed contacts of the two intermediate relays, no fault signal processing and judgment is involved, and the fault state of the limit switch can be judged only by switching on and off the loop of the limit switch. After the alarm generates alarm information, the alarm can remind related personnel to replace the corresponding limit switch, so that the remaining limit switch is prevented from being broken down, and huge loss is caused.
Preferably, the alarm is a buzzer alarm.
The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
In one possible embodiment, the first limit switch is set to X1 and the second limit switch is set to X2. The corresponding first intermediate relay is 2c, and the second intermediate relay is 3c. The first normally closed contact, the first normally open contact, the second normally closed contact, the second normally open contact and the alarm are respectively 2ccb, 2cck, 3ccb, 3cck and FM. The control output contact is 1c. When only one of x1 and x2 is valid (no damage), the signal can be normally output to 1c, and the normal work of the system is ensured. 2c and 3c are 2 intermediate relays, 2cck and 3cck are normally open contacts of 2c and 3c, and 2ccb and 3ccb are normally closed contacts of 2c and 3c. When one of X1 and X2 is in failure, one of 2c and 3c is not changed, and the normally open and normally closed state of the relay with the other state being changed is bound to form a loop driving buzzer FM alarm, and only when X1 and X2 are both kept normal and 2c and 3c are always in the same state, 2 loops formed by 2cck and 3ccb and 2ccb and 3cck are always disconnected, and the buzzer does not give an alarm.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
In addition, various different implementations of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should also be regarded as the disclosure of the embodiments of the present invention.
Claims (10)
1. The utility model provides a point single dual-purpose warning limit switch which characterized in that, point single dual-purpose warning limit switch includes:
the first secondary limit switch (1) and the second secondary limit switch (2) are connected in parallel;
the first secondary limit switch (1) and the second secondary limit switch (2) are respectively connected with an alarm circuit, and the two alarm circuits share one alarm (9);
the alarm (9) is used for generating alarm information after the first secondary limit switch (1) or the second secondary limit switch (2) breaks down.
2. The point single-double warning limit switch according to claim 1, characterized in that the first secondary limit switch (1) and the second secondary limit switch (2) share one control output contact.
3. The single-point double-use alarm limit switch according to claim 1, wherein the first secondary limit switch (1), the second secondary limit switch (2) and the alarm (9) share a power input.
4. The point switch according to claim 1, characterized in that the alarm circuit of the first secondary limit switch (1) comprises:
the alarm comprises a first intermediate relay (3), a first alarm branch and the alarm (9) which are connected in series in sequence.
5. The point switch according to claim 4, characterized in that the alarm circuit of the second secondary limit switch (2) comprises:
the second intermediate relay (6), the second alarm branch and the alarm (9) are connected in series in sequence.
6. The point single/dual-purpose alarm limit switch according to claim 5, wherein the first alarm branch comprises:
a first normally open contact (4) and a first normally closed contact (5) which are connected in parallel; wherein,
the first normally open contact (4) and the first normally closed contact (5) are normally open/normally closed contacts of the first intermediate relay (3).
7. The point switch according to claim 6, wherein said second alarm branch comprises:
a second normally closed contact (7) and a second normally open contact (8) which are connected in parallel; wherein,
the second normally open contact (8) and the second normally closed contact (7) are normally open/normally closed contacts of the second intermediate relay (6).
8. The point switch according to claim 7, wherein said first alarm branch is connected in series with said second alarm branch.
9. The point single-double warning limit switch according to claim 8, characterized in that the first normally open contact (4) is connected in series with the second normally closed contact (7);
the first normally closed contact (5) is connected with the second normally open contact (8) in series.
10. The point single-double use alarm limit switch according to claim 1, wherein the alarm is a buzzer alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220771815.XU CN217955694U (en) | 2022-03-31 | 2022-03-31 | Point single-double-purpose alarm limit switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220771815.XU CN217955694U (en) | 2022-03-31 | 2022-03-31 | Point single-double-purpose alarm limit switch |
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| Publication Number | Publication Date |
|---|---|
| CN217955694U true CN217955694U (en) | 2022-12-02 |
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|---|---|---|---|
| CN202220771815.XU Active CN217955694U (en) | 2022-03-31 | 2022-03-31 | Point single-double-purpose alarm limit switch |
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| CN (1) | CN217955694U (en) |
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- 2022-03-31 CN CN202220771815.XU patent/CN217955694U/en active Active
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