CN220821403U - Circuit system for expanding circuit, expanding safety relay and circuit board laminating equipment - Google Patents

Abstract

The application relates to an extension circuit, an extension safety relay and a circuit system. Wherein the number of contacts in the extension relay is more than two. The contact expansion of the safety relay is realized through the combination of the safety relay and the expansion relay, the model of the safety relay is not limited, and the contact expansion of the safety relay can be performed according to the number of the contacts in the expansion relay only by connecting the inherent contacts of the safety relay of each model. Can be compatible with safety relays of various types, and improves the convenience of safety relay expansion.

Description

Circuit system for expanding circuit, expanding safety relay and circuit board laminating equipment

Technical Field

The application relates to the technical field of safety relays, in particular to an extended circuit, an extended safety relay and a circuit system of circuit board laminating equipment.

Background

With the development of industrialization, electrical devices are increasing, and accordingly, in order to ensure the use safety of the electrical devices, safety relays are increasingly used. Safety relays are one of the most commonly used electrical control elements in safety circuits. The existing safety relay has four structural forms of normally open, normally closed, time delay normally open and time delay normally closed. But safety relays typically have a small number of self-contained contacts, which is generally difficult to meet with devices.

The internal structure of the safety relay is fixed, and the difficulty of undetachable or detachable is high. When the contacts of the safety relay need to be expanded, it is common practice to provide the safety relay with a contact expansion module. The contact extension module is usually provided separately on the conventional contacts or the time delay contacts of the safety relay. However, the contact expansion module is only matched with the safety relay of the corresponding model, the actually used safety relay has various types, and if the contacts of the safety relay are required to be expanded, the corresponding contact expansion modules are required to be configured for the safety relays of all models, so that the convenience is not realized.

Disclosure of utility model

In view of the above, it is necessary to provide an extension circuit, an extension safety relay, and a circuit system of a board laminating apparatus capable of facilitating the implementation of contact extension.

In a first aspect, the application provides an expansion circuit, which comprises a first power interface, a contact interface, an expansion relay and a second power interface, wherein the first power interface is connected with a power supply and the contact interface, the second power interface is connected with the power supply and the expansion relay, and the contact interface is connected with a safety relay and the expansion relay; the number of contacts in the extension relay is more than two.

In one embodiment, the number of the extension relays is more than two, the extension relays are connected in parallel, a first end of each extension relay connected in parallel is connected with the contact interface, and a second end of each extension relay connected in parallel is connected with the second power interface.

In one embodiment, the extension relay includes a coil and an instant contact, the coil being connected to the contact interface and the second power interface.

In one embodiment, the power source connected to the first power interface and the second power interface is the power source connected to the safety relay.

In a second aspect, the application also provides an extended safety relay, which comprises the safety relay and the extended circuit, wherein the safety relay is connected with a contact interface of the extended circuit.

In one embodiment, the safety relay comprises a trigger coil and a contact, wherein the trigger coil is connected with the contact and a power supply, and the contact is connected with a contact interface of the extension circuit.

In one embodiment, the safety relay further comprises a scram device connected to the trigger coil.

In one embodiment, the emergency stop device comprises an interaction device and a control switch, the interaction device is connected with the control switch, the power supply is connected with the trigger coil through the control switch, and the interaction device is used for switching on and off states of the control switch.

In one embodiment, the number of the extension circuits is more than two, and the contact interface of each extension circuit is connected with the contact of the safety relay.

In a third aspect, the present application also provides a circuit system of a circuit board laminating device, comprising an electrical device and an extended safety relay as described above, the electrical device being connected to the extended safety relay.

The circuit system of the expansion circuit, the expansion safety relay and the circuit board laminating equipment comprises a first power interface, a contact interface, the expansion relay and a second power interface, wherein the first power interface is connected with a power supply and the contact interface, the second power interface is connected with the power supply and the expansion relay, and the contact interface is connected with the safety relay and the expansion relay. Wherein the number of contacts in the extension relay is more than two. The contact expansion of the safety relay is realized through the combination of the safety relay and the expansion relay, the model of the safety relay is not limited, and the contact expansion of the safety relay can be performed according to the number of the contacts in the expansion relay only by connecting the inherent contacts of the safety relay of each model. Can be compatible with safety relays of various types, and improves the convenience of safety relay expansion.

Drawings

FIG. 1 is a diagram of an application environment for an expansion circuit in one embodiment;

FIG. 2 is a schematic diagram of an architecture of an expansion circuit in one embodiment;

FIG. 3 is a schematic diagram of an extended circuit in another embodiment;

FIG. 4 is a diagram of an application environment of an expansion circuit in another embodiment;

FIG. 5 is a schematic diagram of the safety relay in one embodiment;

FIG. 6 is a schematic diagram of a safety relay in another embodiment;

Fig. 7 is a schematic diagram of an architecture of an expansion circuit in yet another embodiment.

Reference numerals illustrate: safety relay 102, extension circuit 104, first power interface 202, contact interface 204, extension relay 206, second power interface 208, trigger coil 502, contact 504, and scram device 506.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the application. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The extension circuit provided by the embodiment of the application can be applied to an application environment shown in figure 1. The safety relay 102 is connected with the extension circuit 104, wherein the safety relay 102 is an electric control element commonly used in a safety loop, is applicable to various safety circuits, and is used for protecting the circuit for safe driving. The expansion circuit 104 is used for expanding the contacts of the safety relay 102, and expanding the safety loop where the safety relay 102 is located, so that the on or off action of the safety relay 102 can be transferred to more electric devices through the expanded contacts.

In one embodiment, as shown in fig. 2, an extension circuit 104 is provided that includes a first power interface 202, a contact interface 204, an extension relay 206, and a second power interface 208, the first power interface 202 being coupled to the power and contact interface 204, the second power interface 208 being coupled to the power and extension relay 206, the contact interface 204 being coupled to the safety relay 102 and the extension relay 206.

The extension relay 206 may be any type of relay, and may be used as the extension relay 206 without any additional structural improvement on components of the relay. Optionally, the extension relay 206 may also be a contactor. The extension relay 206 is connected to the safety relay 102 through the contact interface 204, specifically, the contact interface 204 is connected to the contacts of the safety relay 102.

Specifically, the first power interface 202 and the second power interface 208 are both used to connect to a power source, and the on-off of the contact interface 204 can control the expansion relay 206 to be on or off from the power source. And the contact interface 204 is controlled to be switched on and off by the safety relay, when the contacts in the safety relay are conducted, the extension relay 206 is conducted with a power supply through the first power interface 202 and the second power interface 208, and the extension relay 206 is electrified. When contacts within the safety relay are opened, the extension relay 206 is connected to a power source through the second power interface 208, and a circuit loop is not formed with the power source, and the extension relay 206 is powered off. Thereby controlling the on-off between the extension relay 206 and the power supply through the contact action of the safety relay.

Wherein, based on the above embodiment, further, the number of contacts in the extension relay 206 is more than two, and the number may specifically be set to include, but not limited to, for example, two, three, four, or even more, etc., which are not specifically limited herein, and may be configured according to the actual scenario. Because the contacts are arranged in the extension relay 206, the contacts of the safety relay can control the power on and power off of the extension relay 206, which is equivalent to the contact in the extension relay 206 becoming the extension contact of the safety relay. In an actual application scenario, the number of contacts after expansion may be determined according to the number of contacts in the expansion relay 206. That is, when the number of contacts in the extension relay 206 is two or more, contact extension of the safety relay is achieved.

In this embodiment, the extension circuit includes a first power interface 202, a contact interface 204, an extension relay 206, and a second power interface 208, where the first power interface 202 is connected to the power and the contact interface 204, the second power interface 208 is connected to the power and the extension relay 206, and the contact interface 204 is connected to the safety relay and the extension relay 206. Wherein the number of contacts in the extension relay 206 is more than two. The expansion of the contacts of the safety relay is realized through the combination of the safety relay and the expansion relay 206, the model of the safety relay is not limited, and the contacts of the safety relay can be expanded according to the number of the contacts in the expansion relay 206 only by connecting the inherent contacts of the safety relay of each model. Can be compatible with safety relays of various types, and improves the convenience of safety relay expansion.

The safety relays are various in model number and application environment, and in order to meet the contact expansion requirements of the safety relays in different environments, in one embodiment, the number of the expansion relays 206 is more than two. Specifically, the extension relays 206 are connected in parallel, a first end of each extension relay 206 connected in parallel is connected to the trigger interface, and a second end of each extension relay 206 connected in parallel is connected to the second power interface 208. Compared with other setting modes, when one expansion relay 206 breaks down and is disconnected, the influence on other expansion relays 206 is reduced, and mutual interference of the expansion relays 206 can be reduced.

Illustratively, as shown in FIG. 3, the number of extension relays 206 is two. The contacts of the safety relay are extended using two parallel extension relays 206. Alternatively, the number of the extension relays 206 may be any natural number of two or more, and each extension relay 206 is arranged in parallel.

In this embodiment, when the contacts of the single extension relay 206 are insufficient to meet the requirements of the safety relay, a plurality of (more than two) extension relays 206 can be set to extend the contacts of the safety relay, the extension requirements are fully considered, and the setting is simple and convenient.

In one embodiment, the extension relay 206 includes a coil and an instant contact, the coil being connected to the contact interface 204 and the second power interface 208.

Specifically, the extension relay 206 includes a coil that generates a magnetic field according to an electric signal, and an instant contact that is operated (including an off operation and an on operation) under the influence of the magnetic field of the coil. The coil is connected with the contact interface 204 and the second power interface 208, when the contact of the safety relay is conducted, the contact interface 204 is also conducted, the coil is conducted with a power supply, the coil is electrified to generate a magnetic field, and the contact immediately follows the action of the magnetic field.

The characteristic of the instant contact is that when the coil generates a magnetic field, a corresponding action is immediately generated. Optionally, the instant contacts include a normally open contact and a normally closed contact. The relay contacts can also comprise delay contacts, and the delay contacts comprise normally open delay contacts and normally closed delay contacts, and are characterized in that when the coil is electrified to generate a magnetic field, corresponding actions are generated after the delay time is set. Since the contacts in the extension relay 206 of the present application are extension contacts of the safety relay, it is necessary to synchronize with the contact actions of the safety relay. The contact type of the extension relay 206 is an instant contact.

Illustratively, when the immediate contact of the extension relay 206 is a normally open contact, the normally open contact is immediately closed when the extension relay 206 is in the energized state and the coil is energized; when the extension relay 206 is in the de-energized state, the coil is de-energized and the normally open contact is immediately opened.

Since both the safety relay and the extension relay 206 require power, in one embodiment, the application environment of the extension circuit may also be as shown in fig. 4, where the power source connected to the first power interface 202 and the second power interface 208 is the power source connected to the safety relay. The safety relay and the expansion circuit are connected with the same power supply, and the power supply can supply power to the safety relay and the expansion circuit at the same time. The safety relay and the extension circuit are powered by the same power supply, so that the extension circuit and the power supply can be ensured to be conducted only by the contact interface 204 when the safety relay works, and the synchronous action of the extension circuit can be realized. In the embodiment, the same power supply is used for respectively supplying power to the safety relay and the expansion circuit, so that the power supply setting is reduced, and the problem that the expansion circuit cannot synchronize the contact action of the safety relay due to the fact that power supply is not synchronized between the power supplies is solved.

Based on the same technical concept, the application also provides an extended safety relay, as shown in fig. 1, which comprises a safety relay 102 and an extended circuit 104 according to any embodiment, wherein the safety relay 102 is connected with a contact interface 204 of the extended circuit 104. The extended safety relay not only has the contacts of the safety relay 102, but also has the contacts of the extended relay in the extended circuit 104, and compared with the traditional safety relay, the extended safety relay realizes contact multiplication and can meet more safety loop requirements.

In one embodiment, as shown in fig. 5, the safety relay includes a trigger coil 502 and a contact 504, the trigger coil 502 connecting the contact 504 to a power source, the contact 504 connecting a contact interface of an extension circuit.

Specifically, the trigger coil 502 is connected to a power source, and the trigger coil 502 may be directly connected to the power source, or a control loop may be disposed between the power source and the trigger coil 502. The signal output by the control loop can control the on-off between the trigger coil 502 and the power supply. The control loop is related to a safety loop connected with the safety relay, and specifically comprises the following steps: the safety relay receives the safety input, and controls the power supply or the power failure of the trigger coil 502 through the judgment of the control loop, and controls the corresponding contact action, thereby controlling the on-off of the corresponding safety loop. The safety relay is of a double-channel signal type, and can work normally only when two channel signals are normal; in the working process, as long as any channel signal is disconnected, the safety relay can stop outputting until the two channel signals are normal and reset, and then the safety relay can work normally.

The trigger coil 502 of the safety relay may control the action of the safety relay contacts 504 by generating a magnetic field. For a safety relay, the contacts 504 of the safety relay include an instant contact and a time delay contact, wherein the instant contact includes a normally open contact and a normally closed contact, and the time delay contact includes a normally open time delay contact and a normally closed time delay contact.

The contact 504 of the safety relay is connected with the contact interface of the extension circuit, and illustratively, when the contact 504 of the safety relay comprises a normally open time delay contact in the time delay contacts, if the trigger coil 502 of the safety relay is powered on, the normally open time delay contact is closed after the time delay time is set, and the contact interface of the extension circuit is correspondingly conducted. If the trigger coil 502 of the safety relay is powered off, the normally open delay contact is immediately opened, and the contact interface of the expansion circuit is correspondingly opened. When the contact interface of the extension circuit is conducted, the trigger coil 502 in the corresponding extension relay is electrified; when the contact interface of the extension circuit is disconnected, the trigger coil 502 in the corresponding extension relay is powered off. The instant contacts within the extension relay follow the trigger coil 502 to perform the corresponding actions.

In one embodiment, as shown in FIG. 5, the safety relay further includes a scram device 506, the scram device 506 being coupled to the trigger coil 502.

Specifically, the emergency stop device 506 is connected in series with the trigger coil 502 and the power supply, and is disposed between the power supply and the trigger coil 502, so that a worker can switch the state of the emergency stop device 506 to control whether the trigger coil 502 is powered in the safety relay. Further, the emergency stop device 506 is connected in series with the control circuit, and when either of them is in an off state, the trigger coil 502 in the safety relay cannot be powered.

Emergency stop device 506 is an alternative protection device for personnel to manually control the safety relay, and emergency protect the internal components of the extended safety relay and other devices in the safety loop to which the extended safety relay is connected in the event of a fault condition or emergency.

In one embodiment, the emergency stop device comprises an interaction device and a control switch, wherein the interaction device is connected with the control switch, the power supply is connected with the trigger coil 502 through the control switch, and the interaction device is used for switching the on-off state of the control switch.

Specifically, the interaction device can be used for interaction of staff, and actions generated by interaction can correspondingly influence on the on-off of the control switch. When the control switch is in a conductive state, the circuit between the power supply and the trigger coil 502 is controlled by the control loop to be conductive or not, i.e. the safety relay is controlled by the control loop. When the control switch is in an off state, a circuit between the power supply and the trigger coil 502 is disconnected, and no matter whether the control loop is conducted or not, the trigger coil 502 cannot be powered, so that forced power off of the safety relay in an emergency situation is realized. Illustratively, the interaction means may be a button and the control switch may be a normally closed self-locking switch connected to the button. When the worker presses the button, the normally-closed self-locking switch is disconnected.

In one embodiment, in order to secure the number of extension contacts, a plurality of extension circuits may be provided in the extension safety relay, that is, the number of extension circuits is two or more. In particular, the number of extension circuits may be matched to the number of contacts of the safety relay. When the contacts of the safety relay comprise two instant contacts and one delay contact, the number of the expansion circuits can be 3, and the expansion circuits are respectively connected with the contacts of the safety relay.

In one embodiment, there is also provided circuitry for a circuit board lamination device including an electrical device and an extended safety relay as in the above embodiments, the electrical device being connected to the extended safety relay. The electrical device is a mechanical device in a circuit board lamination device for performing a lamination process to a PCB (Printed Circuit Board ) in a circuit board lamination line. Optionally, the electrical device may be a controlled device, and at this time, the electrical device is connected to an extension circuit of the extension safety relay, so that the electrical device may be controlled according to the on-off state of the extension safety relay. The electrical equipment can also be an induction device, such as a sensor, and the like, and the electrical equipment is connected with the safety relay of the expansion safety relay at the moment, and particularly can be a control loop, and the on-off state of the expansion safety relay can be controlled according to the state of the electrical equipment.

In one embodiment, the controlled device comprises a platen press. The board pressing machine is a production machine capable of bonding each layer of circuit board (i.e., PCB) into a whole, and lamination of the circuit board is achieved by heating and pressing each layer of circuit board, for example, a vacuum hot press. In the embodiment, the circuit system can control the working state of the plate pressing machine, and the safety relay is applied to the circuit board laminating production line electric control system, so that the working safety of workers and the plate pressing machine is guaranteed.

For a better understanding of the above solution, the following detailed explanation is made in connection with a specific embodiment in connection with the application scenario shown in fig. 4.

In one embodiment, the safety relay Q1 includes a scram 506, a RESET circuit RESET, a trigger coil 502, and contacts 504, as shown in fig. 6. Wherein the emergency stop device 506 comprises an emergency stop button and a self-locking switch, the connection relation between the power supply (L+ interface and L-interface) and the emergency stop device 506 and the connection relation between the emergency stop device 506 and the trigger coil 502 are not shown. The trigger coil 502 comprises a coil K1, a coil K2, a coil K3 and a coil K4, wherein contacts corresponding to the coil K1 and the coil K2 are normally open contacts (comprising two groups of normally open contacts which can be respectively connected with an extension circuit), and contacts corresponding to the coil K3 and the coil K4 are normally open time delay contacts. The RESET circuit RESET is used for resetting the safety relay Q1. The circuit configuration of the extension circuit 104 is shown in fig. 7, and the extension circuit 104 includes a first power interface 202 (l+), a contact interface 204, an extension relay 206, and a second power interface (L-). Wherein the extension relay 206 includes four sets of normally open contacts and two sets of normally closed contacts. In fig. 7, two extension circuits 104 are shown, one is connected to a normally open contact of the safety relay Q1 (may be any one of two sets of contacts corresponding to the coil K1 and the coil K2), and the other is connected to a normally open delay contact of the safety relay Q1. Alternatively, three extension circuits 104 or other numbers of extension circuits 104 may be connected to two sets of normally open contacts and one set of normally open time delay contacts of the safety relay Q1 respectively.

The safety relay Q1 has two sets of normally open contacts: 13-14 and 23-24, and a set of normally open time delay contacts: 37-38, when the circuit A1 and the circuit A2 connected with the power supply are electrified, and the scram button does not act (i.e. is not pressed), the circuits S11-S12 and the circuits S21-S22 are conducted, at this time, the normally open contacts 13-14 and the normally open contacts 23-24 are closed, and the normally open delay contacts 37-38 are closed after a delay of N (a set value may take any natural number greater than 0) seconds. When the scram button is actuated (i.e., depressed), both circuits S11-S12 and S21-S22 are open, normally open contacts 13-14 and 23-24 are immediately open, and normally open delay contacts 37-38 are also immediately open.

If the extension circuit 104 is connected to the normally open contact 13-14 of the safety relay Q1, when the contact 13-14 of the safety relay Q1 is closed, the coil of the extension relay 206 is energized, and the corresponding contact in the extension circuit immediately operates, for example, the normally open contact is closed, and the normally closed contact is opened. Conversely, when the contacts 13-14 of the safety relay Q1 are opened, the coil of the extension relay 206 is de-energized, and the normally open contact and the normally closed contact corresponding to the coil are restored to the initial state.

If the extension circuit 104 is connected with the normally open time delay contact 37-38 of the safety relay Q1, when the normally open time delay contact 37-38 of the safety relay Q1 is closed, the coil of the extension relay 206 is electrified, and the corresponding contact in the coil immediately acts, for example, the normally open contact is closed, and the normally closed contact is opened. Conversely, when the normally open time delay contacts 37-38 of the safety relay Q1 are opened, the coil of the extension relay 206 is deenergized, and the normally open contacts and the normally closed contacts corresponding to the coil are restored to the initial state.

In this embodiment, when the contact 504 of the safety relay Q1 is turned on, the contact interface 204 in the extension circuit 104 is turned on, the extension relay 206 is powered, and the contact in the extension relay 206 acts correspondingly, so that multiplication extension can be implemented on the contact of the safety relay. The safety relay is not limited in type, and only the inherent contacts of the safety relay of each type are connected, so that the safety relay of each type can be compatible, and the convenience of expansion of the safety relay is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The expansion circuit is characterized by comprising a first power interface, a contact interface, an expansion relay and a second power interface, wherein the first power interface is connected with a power supply and the contact interface, the second power interface is connected with the power supply and the expansion relay, and the contact interface is connected with a safety relay and the expansion relay; the number of contacts in the extension relay is more than two.

2. The extension circuit of claim 1, wherein the number of extension relays is two or more, each extension relay is connected in parallel, a first end of each extension relay connected in parallel is connected to the contact interface, and a second end of each extension relay connected in parallel is connected to the second power interface.

3. The extension circuit of claim 1, wherein the extension relay comprises a coil and an instant contact, the coil being connected to the contact interface and the second power interface.

4. The expansion circuit of claim 1, wherein the power source to which the first power interface is connected to the second power interface is the power source to which the safety relay is connected.

5. An extended safety relay comprising a safety relay and an extended circuit according to any one of claims 1-4, said safety relay being connected to a contact interface of said extended circuit.

6. The extended safety relay of claim 5, wherein the safety relay comprises a trigger coil and a contact, the trigger coil connecting the contact and a power source, the contact connecting a contact interface of the extended circuit.

7. The extended safety relay of claim 6, further comprising a scram device connected to the trigger coil.

8. The extended safety relay according to claim 7, wherein the emergency stop device comprises an interaction device and a control switch, the interaction device is connected with the control switch, the power supply is connected with the trigger coil through the control switch, and the interaction device is used for switching the on-off state of the control switch.

9. The extended safety relay of claim 6, wherein the number of extended circuits is more than two, and the contact interface of each extended circuit connects the contacts of the safety relay.

10. A circuit system of a circuit board laminating apparatus comprising an electrical apparatus and an extended safety relay according to any one of claims 5 to 9, said electrical apparatus being connected to said extended safety relay.