Interlocking control device, contactor assembly and interlocking control method thereof

Abstract

The present invention discloses an interlocking control device, a contactor assembly and an interlocking control method thereof, wherein the device comprises: a first wiring terminal for connecting a coil control circuit of a first contactor; a second wiring terminal for connecting a coil control circuit of a second contactor; a first relay for controlling the coil control circuit of the first contactor; a second relay for controlling the coil control circuit of the second contactor; and a control unit for operating in an interlocking mode when any one of the first contactor and the second contactor is energized, and controlling the simultaneous opening or closing of the first switch and the second switch to realize interlocking control of the first contactor and the second contactor. The scheme of the present invention can solve the problem of high wiring error rate of contactor electrical interlocking elements, and achieve the effect of reducing the wiring error rate of contactor electrical interlocking elements.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic circuits, and specifically relates to an interlocking control device, a contactor assembly and an interlocking control method thereof, and more particularly to a novel contactor interlocking element, a contactor having the novel contactor interlocking element, and an interlocking control method of the contactor. Background Art

[0002] Some contactor electrical interlocking components have strict requirements on the electrical wiring of the contactor control circuit where the two normally closed contacts are located. For example, if it is necessary to clearly distinguish which contactor coil control circuit the upper and lower terminals should be connected to, the wiring error rate is high.

[0003] Figure 2 It can show the control principle of the mechanical structure inside the contactor where the normally closed contacts K1 and K2 are connected by dotted lines. Figure 2 In the example shown, in the contactor electrical interlocking element, the normally closed contact of one contactor is directly connected in series to the coil control circuit of another contactor. Faced with the upper and lower layers of wiring terminals on the interlocking part, the operator needs to strictly distinguish which contactor coil control circuit the upper and lower layers of wiring terminals should be connected to in principle, which cannot achieve effective "error prevention" and there is a risk of wrong wiring of the contactor during mass production.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The object of the present invention is to provide an interlock control device, a contactor assembly and an interlock control method thereof, so as to solve the problem of high wiring error rate of contactor electrical interlock elements and achieve the effect of reducing the wiring error rate of contactor electrical interlock elements.

[0006] The present invention provides an interlocking control device, comprising: a first interlocking unit, a second interlocking unit and a control unit; the first interlocking unit comprises: a first wiring terminal, a first relay and a first switch; the second interlocking unit comprises: a second wiring terminal, a second relay and a second switch; wherein the first wiring terminal is used to connect a coil control circuit of a first contactor; the second wiring terminal is used to connect a coil control circuit of a second contactor; the first relay is used to control the coil control circuit of the first contactor; the second relay is used to control the coil control circuit of the second contactor; the control unit is used to operate in an interlocking mode when any one of the first contactor and the second contactor is energized and operates, and control the first switch and the second switch to be opened or closed at the same time, so as to realize interlocking control of the first contactor and the second contactor.

[0007] Optionally, the number of first terminals is a pair; one of the first terminals in the pair is connected to the first end of the coil in the coil control circuit of the first contactor; the other first terminal in the pair is connected to the second end of the coil in the coil control circuit of the first contactor; the number of second terminals is a pair; one of the second terminals in the pair is connected to the first end of the coil in the coil control circuit of the second contactor; the other second terminal in the pair is connected to the second end of the coil in the coil control circuit of the second contactor.

[0008] Optionally, a pair of first wiring terminals is a first group of wiring terminals, and a pair of second wiring terminals is a second group of wiring terminals.

[0009] Optionally, the first relay comprises: a coil and a normally open contact; the normally open contact of the first relay is connected in parallel with the first switch; wherein the first end of the coil of the first relay is connected to one of a pair of first terminals; the second end of the coil of the first relay is connected to the other first terminal of the pair of first terminals after passing through the first switch; the first switch is linked with the control unit; the second relay comprises: a coil and a normally open contact; the normally open contact of the second relay is connected in parallel with the second switch; wherein the first end of the coil of the second relay is connected to one of the second terminals of the pair of second terminals; the second end of the coil of the second relay is connected to the other second terminal of the pair of second terminals after passing through the second switch; the second switch is linked with the control unit.

[0010] Optionally, the control unit includes: a mechanical transmission device, a first assembly end and a second assembly end, the first assembly end and the second assembly end are respectively arranged at two ends of the mechanical transmission device; the mechanical transmission device is respectively linked with the first switch and the second switch; the first assembly end is connected to the linkage mechanism of a group of normally open contacts of the first contactor; the second assembly end is connected to the linkage mechanism of a group of normally open contacts of the second contactor.

[0011] Optionally, it also includes: a selection unit; the selection unit is respectively arranged to cooperate with the first interlocking unit and the second interlocking unit, and is used to switch the working mode of the interlocking control device, and the working mode includes an interlocking mode and a non-interlocking mode; wherein, in the interlocking mode, the interlocking control of the first contactor and the second contactor can be achieved through the control unit; in the non-interlocking mode, the interlocking control of the first contactor and the second contactor is released through the control unit.

[0012] Optionally, the selection unit includes: a selection switch; the selection switch is connected to the first interlocking unit and the second interlocking unit respectively, and is used to simultaneously control the working modes of the first interlocking unit and the second interlocking unit; the working modes include: a mode that can achieve interlocking, or a mode in which interlocking has been released.

[0013] Matching the above device, the present invention provides a contactor assembly on another aspect, comprising: the interlocking control device mentioned above; the interlocking control device is clamped between the first contactor and the second contactor.

[0014] Matching the above-mentioned contactor assembly, the present invention provides an interlocking control method of a contactor assembly on another aspect, comprising: connecting a coil control circuit of a first contactor through a first terminal; connecting a coil control circuit of a second contactor through a second terminal; controlling the coil control circuit of the first contactor through a first relay; controlling the coil control circuit of the second contactor through a second relay; and, through a control unit, in an interlocking mode, when any one of the first contactor and the second contactor is energized and actuated, and controlling the first switch and the second switch to be opened or closed simultaneously, so as to realize interlocking control of the first contactor and the second contactor.

[0015] Optionally, it also includes: switching the working mode of the interlocking control method through a selection unit respectively arranged in cooperation with the first interlocking unit and the second interlocking unit, and the working mode includes an interlocking mode and a non-interlocking mode; wherein, in the interlocking mode, the interlocking control of the first contactor and the second contactor can be achieved through the control unit; in the non-interlocking mode, the interlocking control of the first contactor and the second contactor is released through the control unit.

[0016] The solution of the present invention is to set two wiring terminals in layers outside the shell of the interlocking part, and set a micro relay with auxiliary contacts and a mechanical transmission device inside the interlocking part, so that when wiring, no matter which layer of the upper and lower wiring terminals the coil control circuit of one of the contactors is connected to, the normal interlocking function can be achieved, which can at least solve the problem of wiring errors.

[0017] Furthermore, the solution of the present invention, by providing two micro relays with normally open contacts in the internal circuit of the interlocking element, can form local self-locking in the corresponding contactor coil control loop when power is turned on, which can simplify the production electrical wiring operation and reduce the wiring error rate.

[0018] Furthermore, the solution of the present invention is to connect to the internal circuit by setting a selection switch inside the interlocking part. If the selection switch is closed by rotating it, when one of the contactors is energized and attracted, the other contactor can still be energized and attracted, that is, the interlocking constraint of the two contacts is shielded in electrical logic, and the two working modes of "interlocking" and "non-interlocking" can be freely converted, which can greatly improve the efficiency of circuit transformation.

[0019] Therefore, the scheme of the present invention, by arranging two wiring terminals in layers outside the shell of the interlocking part, and arranging a micro relay with auxiliary contacts and a mechanical transmission device inside the interlocking part, can achieve the normal interlocking function no matter which layer of the upper and lower wiring terminals the coil control circuit of one of the contactors is connected to during wiring, thereby solving the problem of high wiring error rate of the contactor electrical interlocking elements, such as solving the problem of high wiring error rate in the way of connecting the normally closed contact of one contactor in series in the coil control circuit of another contactor to form an electrical interlock, thereby achieving the effect of reducing the wiring error rate of the contactor electrical interlocking elements.

[0020] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the interlocking control device of the present invention;

[0023] Figure 2 It is a schematic diagram of the electrical structure of an embodiment of a contactor interlocking element;

[0024] Figure 3 It is a schematic diagram of the electrical structure of an embodiment of a novel contactor interlocking element;

[0025] Figure 4 It is a schematic diagram of the external structure of an embodiment of a novel contactor interlocking element;

[0026] Figure 5 A schematic structural diagram of an embodiment of an internal mechanical transmission device of a novel contactor interlocking element;

[0027] Figure 6 It is a flowchart of an embodiment of the interlocking control method of the present invention.

[0028] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0029] 10 - upper terminal of interlocking piece; 20 - lower terminal of interlocking piece; 30 - mechanical transmission device; 40 - mode conversion switch; 51 - first contact (such as contact K1); 52 - second contact (such as contact K2); 61 - first assembly end (such as the end assembled with contactor KM1); 62 - second assembly end (such as the end assembled with contactor KM2). DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] According to an embodiment of the present invention, an interlocking control device is provided. Figure 1 The schematic diagram of the structure of an embodiment of the device of the present invention is shown. The interlocking control device may include: a first interlocking unit, a second interlocking unit and a control unit; the first interlocking unit includes: a first wiring terminal, a first relay and a first switch; the second interlocking unit includes: a second wiring terminal, a second relay and a second switch.

[0032] Specifically, the first terminal can be used to connect the coil control circuit of the first contactor. The first terminal is such as the lower terminal 20 of the interlocking member. The first contactor is a contactor in the contactor assembly to be interlocked, such as the contactor KM1.

[0033] Specifically, the second terminal can be used to connect the coil control circuit of the second contactor. The second terminal is such as the upper terminal 10 of the interlocking member. The second contactor is another contactor in the contactor assembly to be interlocked, such as contactor KM2.

[0034] For example: a new interlocking method is adopted by setting up a micro relay with auxiliary contacts and a mechanical transmission device inside the interlocking part, which solves the problem of abnormal "attract-disconnect-attract-disconnect" phenomenon when the wiring sequence of the upper and lower terminals of the traditional interlocking part is changed; by setting two terminals, the normal interlocking function can be achieved no matter which layer of the upper and lower terminals the coil control circuit of one of the contactors is connected to during wiring, thereby achieving the effect of avoiding electrical safety hazards caused by wiring errors.

[0035] In an optional example, the number of first wiring terminals is a pair. One of the first wiring terminals in the pair is connected to the first end of the coil in the coil control circuit of the first contactor. The other first wiring terminal in the pair is connected to the second end of the coil in the coil control circuit of the first contactor. In the coil control circuit of the first contactor, a first switch such as switch QS1 is provided. One end of the first switch QS1 is connected to the first end of the coil in the coil control circuit of the first contactor, and the second end of the first switch QS1 is connected to the other first wiring terminal in the pair of first wiring terminals.

[0036] Accordingly, the number of the second wiring terminals is a pair. One of the second wiring terminals in the pair is connected to the first end of the coil in the coil control circuit of the second contactor. The other second wiring terminal in the pair is connected to the second end of the coil in the coil control circuit of the second contactor. In the coil control circuit of the second contactor, a second switch such as switch QS2 is provided. One end of the second switch QS2 is connected to the first end of the coil in the coil control circuit of the second contactor, and the second end of the second switch QS2 is connected to the other second wiring terminal in the pair of second wiring terminals.

[0037] Therefore, by setting two groups of wiring terminals, respectively corresponding to the coil control circuits of the two contactors to be interlocked, two separate coil control circuits can be formed, which is not only convenient for self-locking, but also convenient for mode switching.

[0038] Optionally, the pair of first terminals is a first group of terminals, and the pair of second terminals is a second group of terminals. The first group of terminals and the second group of terminals are arranged in a layered manner outside the interlocking control device, such as being arranged in a layered manner outside the housing of the interlocking control device.

[0039] For example, the external wiring terminals of the interlocking parts are in the form of upper and lower wiring, the two upper wiring terminals (such as the upper wiring terminals 10 of the interlocking parts) are a group, and the two lower wiring terminals (such as the lower wiring terminals 20 of the interlocking parts) are a group. The upper and lower wiring terminals can effectively save space and facilitate the layout of the electrical box in practical applications; secondly, it is conducive to production wiring identification, such as the two upper wiring terminals are connected to the coil control circuit of one contactor, and the two lower wiring terminals are connected to the coil control circuit of another contactor.

[0040] Therefore, by arranging the two groups of connection terminals in layers, they can be easily distinguished from the appearance, thereby making wiring more convenient and avoiding wiring errors.

[0041] Specifically, the first relay can be used to control the coil control circuit of the first contactor. The first relay is, for example, a first micro relay KA1 with auxiliary contacts.

[0042] Specifically, the second relay can be used to control the coil control circuit of the second contactor. The second relay is, for example, a second micro relay KA2 with auxiliary contacts.

[0043] For example, two micro relays KA1 and KA2 with normally open contacts are provided in the internal circuit of the interlocking element, which can be used to form a local self-locking in the corresponding contactor coil control circuit when the power is turned on. Thus, it can mainly solve the problem that some interlocking element wiring needs to clearly distinguish which contactor coil control circuit the upper and lower wiring terminals should be connected to, which can simplify the production electrical wiring operation and reduce the wiring error rate.

[0044] In an optional example, the first relay may include: a coil and a normally open contact; the normally open contact of the first relay is connected in parallel with the first switch. For example, the first relay may be the first micro relay KA1. The first micro relay KA1 may include: a coil KA1 of the first micro relay KA1, and a normally open contact KA1 of the first micro relay KA1. The first switch such as the normally closed contact K1 is arranged in linkage with the mechanical transmission device.

[0045] Correspondingly, the second relay may include: a coil and a normally open contact; the normally open contact of the second relay is connected in parallel with the second switch. For example, the second relay may be a second micro relay KA2. The second micro relay KA2 may include: a coil KA2 of the second micro relay KA2, and a normally open contact KA2 of the second micro relay KA2. The second switch such as the normally closed contact K2 is arranged in linkage with the mechanical transmission device.

[0046] For example, two micro relays KA1 and KA2 are arranged in the internal circuit of the interlocking element, which, combined with two normally closed contacts K1 and K2 directly controlled by the mechanical control unit, form a mechanism of "local control circuit self-locking and overall functional interlocking" inside the interlocking component.

[0047] Therefore, by setting two relays, the two relays form two control loops with the two contactors respectively, and the two relays can be linked through the control unit. The control unit takes action when the contactor is actuated, thereby ensuring the reliability of interlocking.

[0048] Specifically, the control unit can be used to operate in the interlocking mode when any one of the first contactor and the second contactor is powered on, and control the simultaneous opening or closing of the first switch and the second switch to achieve interlocking control of the first contactor and the second contactor. The control unit can be a mechanical transmission device. The control unit is respectively arranged in cooperation with the first contactor, the second contactor, the first auxiliary contactor, and the second auxiliary contactor.

[0049] For example: two normally closed contacts K1 and K2 are set inside the interlocking element, and their opening and closing are directly controlled by a mechanical linkage device. The interlocking of the entire circuit is achieved by introducing mechanical transmission feedback of the main normally open contacts of the external contactor into the circuit. This design of mechanical transmission combined with electrical control enables the contact interlocking part of the present invention to have two relatively independent contactor coil control circuit control units. Thus, the problem of abnormal start and stop of the contactor and the whole machine load after power-on can be solved when the wiring circuit of some interlocking elements is selected incorrectly, and the risk of electrical safety accidents can be avoided.

[0050] For example: a new interlocking method is adopted by setting up a micro relay with auxiliary contacts and a mechanical transmission device inside the interlocking part, which solves the problem of abnormal "attract-disconnect-attract-disconnect" phenomenon when the wiring sequence of the upper and lower terminals of the traditional interlocking part is changed; by setting two terminals, the normal interlocking function can be achieved no matter which layer of the upper and lower terminals the coil control circuit of one of the contactors is connected to during wiring, thereby achieving the effect of avoiding electrical safety hazards caused by wiring errors.

[0051] Thus, by combining the transmission structure with two relays, interlocking control of two contactors to be interlocked can be achieved, and wiring errors can be avoided by providing two wiring terminals.

[0052] In an optional example, the control unit may include: a mechanical transmission device, a first assembly end and a second assembly end, wherein the first assembly end and the second assembly end are respectively arranged at two ends of the mechanical transmission device;.

[0053] The mechanical transmission device is respectively linked with the first switch and the second switch. Specifically, the linkage mechanism of the first switch is connected to the mechanical transmission device. The linkage mechanism of the second switch is connected to the mechanical transmission device.

[0054] The first assembly end is connected to a linkage mechanism of a group of normally open contacts of the first contactor. The second assembly end is connected to a linkage mechanism of a group of normally open contacts of the second contactor.

[0055] For example: when the interlocking part is installed, it can be clamped in the middle position of the two contactors. The interlocking part has a first assembly end 61 and a second assembly end 62 extending from both sides of the mechanical transmission device 30 connected to the internal linkage device of the interlocking part, which can be respectively connected to the main normally open contacts (such as the first contact 51 and the second contact 52) ​​of the left and right contactors. For example: the first contact 51, such as contact K1. The second contact 52, such as contact K2. The first assembly end 61, assembled in combination with the contactor KM1. The second assembly end 62, one end assembled in combination with the contactor KM2. The action feedback of the left and right contactors of the interlocking part can be obtained through the first assembly end 61 and the second assembly end 62 of the mechanical transmission device 30 that are extended. When any of the left and right contactors are attracted, the mechanical transmission device 30 will be driven to move, thereby triggering the action of the normally closed contact inside the interlocking part.

[0056] Among them, the mechanical control unit inside the interlocking part directly controls the opening and closing of the two normally closed contacts. After the interlocking part and its two left and right contactors KM1 and KM2 are correctly assembled, the action of the normally open main contact of the contactor directly triggers the action of the mechanical control unit inside the interlocking part, and then directly controls the normally closed contacts K1 and K2 inside the interlocking part to open and close at the same time. When the coil of one of the contactors (KM1) is energized and attracted, the mechanical action feedback of the contactor can be directly introduced, thereby triggering the normally closed contacts K1 and K2 inside the interlocking part to disconnect, that is, cutting off the power circuit of the coil of the other contactor (KM2), making it impossible for the contactor to attract, thereby effectively achieving the interlocking effect.

[0057] Therefore, by setting the control unit to perform linkage control on the first relay and the second relay based on the action of the first contactor or the second contactor, reliable interlocking can be avoided and wrong wiring is not easy to occur.

[0058] In an optional implementation, the method may further include: a selection unit.

[0059] The selection unit, respectively arranged in cooperation with the first interlocking unit and the second interlocking unit, can be used to switch the working mode of the interlocking control device, and the working mode may include an interlocking mode and a non-interlocking mode.

[0060] In the interlocking mode, the control unit can realize the interlocking control of the first contactor and the second contactor. In the non-interlocking mode, the control unit releases the interlocking control of the first contactor and the second contactor. In addition, in the non-interlocking mode, the first and second power supplies can also be powered simultaneously.

[0061] For example: a selection switch SW is set inside the interlocking part to connect to the internal circuit. If the selection switch SW is closed by rotating it, when one of the contactors KM1 is energized and attracted, the other contactor KM2 can still be energized and attracted, that is, the interlocking constraint of the two contacts is shielded in electrical logic, and the two working modes of "interlocking" and "non-interlocking" can be freely converted, which solves the problem of complex disassembly and modification of electrical components when realizing the mode conversion, greatly improves the circuit modification efficiency, and thus solves the problem that circuits using some interlocking elements cannot be quickly and easily converted to non-interlocking mode.

[0062] Therefore, by setting up the selection unit, while ensuring that the circuit interlocking function can be realized, the difficulty of production wiring can be effectively reduced, production efficiency can be improved, and the risk of electrical safety accidents caused by incorrect wiring of interlocking parts can be avoided. At the same time, it can also more conveniently realize the conversion of the original circuit from electrical interlocking mode to non-electrical interlocking mode.

[0063] In an optional example, the selection unit may include: a selection switch. The selection switch is connected to the first interlocking unit and the second interlocking unit respectively, and is used to simultaneously control the working modes of the first interlocking unit and the second interlocking unit; the working modes include: a mode capable of achieving interlocking, or a mode in which interlocking has been released.

[0064] For example, a selection switch SW is provided in the internal circuit of the interlocking element, so that the interlocking element has the function of selecting whether to use the electrical interlocking function. The user can freely select according to actual needs. In actual operation, a flat-blade screwdriver tool is used to rotate the selection knob on the interlocking component body to the corresponding state. There is no need to disassemble and replace electrical components and related electrical wiring, which greatly simplifies the difficulty of switching circuit modes.

[0065] For example: in the interlocking working mode, when the knob switch SW is in the off position, the interlocking element performs the electrical interlocking function. When the switch QS1 is closed first, that is, when the contactor KM1 coil control circuit is energized, the micro relay KA1 coil in the circuit is energized, and the KA1 normally open contact is attracted, so that the KM1 coil control circuit is self-locked, and the contactor KM1 main normally open contact is attracted, driving the internal mechanical transmission device of the interlocking element to disconnect K1 and K2 in the interlocking element at the same time. At this time, the switch QS2 is closed again, and the KM2 coil control circuit cannot be energized due to the disconnection of K2, that is, the circuit cannot form a self-locking, the contactor KM2 coil is not energized, and the KM2 main normally open contact is not attracted. When one of the contactors KM1 control coils is energized, the KM1 coil control circuit can be kept energized and not affected by the disconnection of K1; at this time, the other contactor KM2 will cause the coil control circuit to be de-energized due to the disconnection of K2, and then cannot be attracted, that is, the interlocking function is effectively realized.

[0066] Another example: In the interlocking mode, when the switch QS2 is closed first, the contactor KM2 will be energized and closed, K1 and K2 will be disconnected, the coil of the contactor KM1 will be disconnected because of its coil control circuit, and the main normally open contact of KM1 will not operate, that is, the electrical interlocking function of the two contactors can be realized at this time. Among them, the contactors KM1 and KM2 can choose any one of the upper and lower groups of wiring terminals of the interlocking element without being affected. This can avoid the disadvantage that the upper and lower layers of wiring terminals of some interlocking parts must be connected to specific contactors. If the wrong order is connected, it will cause the contactor to malfunction and cause electrical safety accidents.

[0067] For example: in the non-interlocking working mode, when the rotary switch SW is in the closed state, the electrical interlocking function is not executed. First, the switch QS1 is closed, the coil of the micro relay KA1 in the KM1 coil control circuit is short-circuited, the KM1 coil is directly energized, and the KM1 main contact is energized; then the switch QS2 is closed, the coil of the micro relay KA2 in the KM2 coil control circuit is short-circuited, the KM1 coil is directly energized, and the KM1 main contact is energized; that is, at this time, the two contactor control circuits can be independent of each other and can work simultaneously without being restricted by interlocking. When the rotary switch SW is turned to make it in the closed state, the interlocking part no longer has the interlocking function. When one of the contactors KM1 is energized and energized, the other contactor KM2 can still be energized when the control coil is energized, that is, KM1 and KM2 can work at the same time; the conversion from "interlocking mode" to "non-interlocking mode" is realized, which meets the needs of actual engineering applications to the greatest extent.

[0068] Therefore, by setting a selection switch for mode switching, the control can be switched between the interlocking mode and the non-interlocking mode, which is more flexible and convenient to use.

[0069] After a large number of tests and verifications, the technical solution of the present invention is adopted, by arranging two wiring terminals in layers outside the shell of the interlocking part, and arranging a micro relay with auxiliary contacts and a mechanical transmission device inside the interlocking part, so that when wiring, no matter which layer of the upper or lower wiring terminals the coil control circuit of one of the contactors is connected to, the normal interlocking function can be achieved, and at least the problem of wiring errors can be solved.

[0070] According to an embodiment of the present invention, a contactor assembly corresponding to an interlocking control device is also provided. The contactor assembly may include: the interlocking control device described above. The interlocking control device is sandwiched between a first contactor and a second contactor.

[0071] Specifically, the contactor assembly may include: the interlocking control device described above, a first contactor, a second contactor, a first power supply system, a second power supply system and a load. The interlocking control device is clamped between the first contactor and the second contactor. The first contactor is connected to the first power supply system, the second contactor is connected to the second power supply system, and the first power supply system and the second power supply system are respectively connected to corresponding loads.

[0072] For example: Figure 2 In the example shown, the normally closed contact K1 of the contactor KM1 needs to be connected in series in the coil control circuit of the contactor KM2 so that the contactors KM1 and KM2 form an interlocking element. Figure 2 In the example shown, if the normally closed contact of contactor KM1 is connected in series in the coil control circuit of contactor KM1, contactor KM1 cannot be interlocked with contactor KM2. Figure 2 The wiring method shown has a high wiring error rate; moreover, the operator needs to strictly distinguish and confirm which contactor's coil control circuit the wiring terminals at both ends of the normally closed contacts in the interlocking component correspond to, which increases the difficulty of operation identification.

[0073] Furthermore, if the contactor coil control circuit corresponding to the normally closed contacts of some interlocking elements is incorrectly selected, the contactor on the energized side will exhibit an abnormal phenomenon of continuous "attract-disconnect-attract-disconnect" during use, and the interlocking function will fail. In severe cases, it will directly affect the abnormally frequent start and stop of the control load, causing serious damage to the entire system and even causing electrical safety accidents.

[0074] In addition, in actual engineering applications, there is often a need for flexible conversion of control circuit interlocking relationships. Taking the dual power supply switching application scenario as an example, in addition to the requirement that A and B power supplies can be powered by a single power supply (the other power supply implements circuit breaker protection); there is often a requirement to remove the circuit interlocking function and enable A and B power supplies to be powered at the same time. However, the interlocking unit composed of some interlocking elements cannot easily meet this requirement, so it is often necessary to carry out complicated disassembly and modification of related electrical components in the original circuit, which leads to untimely switching and increased difficulty in operation, and is not easy to operate.

[0075] In an optional embodiment, the scheme of the present invention provides a new contactor interlocking element, which adopts a new interlocking method by arranging a micro-relay with auxiliary contacts and a mechanical transmission device inside the interlocking part, so that when wiring, no matter which layer of the upper and lower terminals the coil control circuit of one of the contactors is connected to, the normal interlocking function can be achieved, which solves the problem of abnormal "attract-disconnect-attract-disconnect" phenomenon that will occur when the wiring sequence of the upper and lower terminals of the traditional interlocking part is changed, thereby achieving the effect of avoiding electrical safety hazards caused by wiring errors.

[0076] Optionally, two micro relays KA1 and KA2 with normally open contacts are provided in the internal circuit of the interlocking element, which can be used to form a local self-locking in the corresponding contactor coil control circuit when power is turned on. Thus, the problem that the wiring of some interlocking elements needs to clearly distinguish which contactor coil control circuit the upper and lower wiring terminals should be connected to can be mainly solved, which can simplify the production electrical wiring operation and reduce the wiring error rate.

[0077] Optionally, two normally closed contacts K1 and K2 are provided inside the interlocking element, whose opening and closing are directly controlled by a mechanical linkage device, and the interlocking of the entire circuit is realized by introducing mechanical transmission feedback of the main normally open contacts of the external contactor into the circuit. This design of mechanical transmission combined with electrical control enables the contact interlocking part of the present invention to have two relatively independent contactor coil control circuit control units. Thus, the problem that when the wiring circuit of some interlocking elements is incorrectly selected, the abnormal start and stop of the contactor and the whole machine load after power-on can be solved, and the risk of electrical safety accidents can be avoided.

[0078] Furthermore, in the solution of the present invention, a selection switch SW is provided inside the interlocking part to connect to the internal circuit. If the selection switch SW is closed by rotating it, when one of the contactors KM1 is energized and attracted, the other contactor KM2 can still be energized and attracted, that is, the interlocking constraint of the two contacts is shielded in electrical logic, and the two working modes of "interlocking" and "non-interlocking" can be freely switched, which solves the problem of complex disassembly and modification of electrical components when realizing the mode conversion, greatly improves the circuit modification efficiency, and thus solves the problem that circuits using some interlocking elements cannot be quickly and easily converted to non-interlocking mode.

[0079] Optionally, a selection switch SW is set in the internal circuit of the interlocking element, so that the interlocking element has the selection function of using the electrical interlocking function or not. The user can freely choose according to actual needs. During actual operation, a flat-blade screwdriver tool is used to rotate the selection knob on the interlocking component body to the corresponding state. There is no need to remove and replace electrical components and related electrical wiring, which greatly simplifies the difficulty of switching circuit modes.

[0080] It can be seen that the new contactor interlocking element provided by the solution of the present invention can effectively reduce the difficulty of production wiring, improve production efficiency, and avoid the risk of electrical safety accidents caused by incorrect wiring of interlocking parts while ensuring the circuit interlocking function. At the same time, it can also more conveniently realize the conversion of the original circuit from the electrical interlocking mode to the non-electrical interlocking mode.

[0081] In an alternative embodiment, see Figures 3 to 5 The examples shown are used to illustrate the specific implementation process of the solution of the present invention.

[0082] In an alternative specific example, see Figure 3 In the example shown, the wiring terminals outside the interlocking part (such as the outside of the housing) are in the upper and lower wiring form, the two upper wiring terminals (such as the upper wiring terminals 10 of the interlocking part) are a group, and the two lower wiring terminals (such as the lower wiring terminals 20 of the interlocking part) are a group. The upper and lower wiring terminals form can effectively save space, which is conducive to the layout of the electrical box in practical applications; secondly, it is conducive to production wiring identification, such as the two upper wiring terminals are connected to the coil control circuit of one contactor, and the two lower wiring terminals are connected to the coil control circuit of another contactor.

[0083] When the interlocking part is installed, it can be clamped in the middle position of the two contactors. The first assembly end 61 and the second assembly end 62 of the mechanical transmission device 30 connected to the internal linkage device of the interlocking part are extended on both sides of the interlocking part, and can be respectively connected to the main normally open contacts (such as the first contact 51 and the second contact 52) ​​of the left and right contactors. For example: the first contact 51, such as contact K1. The second contact 52, such as contact K2. The first assembly end 61, assembled in combination with the contactor KM1. The second assembly end 62, one end assembled in combination with the contactor KM2. The action feedback of the left and right contactors of the interlocking part can be obtained through the first assembly end 61 and the second assembly end 62 of the extended mechanical transmission device 30. When any one of the left and right contactors is attracted, it will drive the mechanical transmission device 30 to act, thereby triggering the action of the normally closed contact inside the interlocking part.

[0084] The mechanical control unit inside the interlock directly controls the opening and closing of the two normally closed contacts. One possible structural form is as follows: Figure 4 , Figure 5 The example shown. After the interlocking part is correctly assembled with its two left and right contactors KM1 and KM2, the action of the normally open main contact of the contactor directly triggers the action of the mechanical control unit inside the interlocking part, and then directly controls the normally closed contacts K1 and K2 inside the interlocking part to open and close at the same time. When the coil of one of the contactors (KM1) is energized and attracted, the mechanical action feedback of the contactor can be directly introduced, thereby triggering the normally closed contacts K1 and K2 inside the interlocking part to open, that is, cutting off the coil power circuit of the other contactor (KM2), making it impossible for the contactor to attract, thereby effectively achieving the interlocking effect.

[0085] Optionally, two micro relays KA1 and KA2 are provided in the internal circuit of the interlocking element, and combined with two normally closed contacts K1 and K2 directly controlled by the mechanical control unit to form a "local control loop self-locking, overall functional interlocking" mechanism inside the interlocking element. The specific working principle can be found in Figure 3 Example shown.

[0086] In the interlocking working mode, when the knob switch SW (such as the mode conversion switch 40) is in the off position, the interlocking element performs an electrical interlocking function, and details can be found in the following exemplary description.

[0087] The first interlocking situation: when the switch QS1 is closed first, that is, when the contactor KM1 coil control circuit is energized, the micro relay KA1 coil in the circuit is energized, and the KA1 normally open contact is attracted, so that the KM1 coil control circuit is self-locking, and the contactor KM1 main normally open contact is attracted, driving the internal mechanical transmission device of the interlocking element to disconnect K1 and K2 in the interlocking element at the same time. Figure 5 In the example shown, when any one of the contactors KM1 and KM2 is energized, the normally closed contacts K1 and K2 will be opened at the same time.

[0088] For example: See Figure 3 In the example shown, when the KM1 coil control circuit is initially powered on, the current passes through the normally closed contact K1 to energize the micro relay KA1 coil, and the KA1 coil is energized, causing the KA1 normally open contact to close. At this time, the KA1 coil has two power supply paths: one is the normally closed contact K1, and the other is the closed KA1 normally open contact. Therefore, even if the normally closed contact K1 is disconnected, the KA1 coil can still be energized through the closed KA1 normally open contact and will not be affected by K1. That is, the KM1 coil control circuit will not be affected by the opening and closing of K1, so the KM1 coil control circuit has achieved "self-locking".

[0089] For example: See Figure 5 In the example shown, holes for connecting interlocking parts are reserved on both sides of the commonly used contactor. Figure 5 The middle interlocking member connecting rod 61 is inserted into the hole on the right side of the contactor KM1. When the coil of the contactor KM1 is energized, the main contact of KM1 is attracted and moves downward, and the downward attracted main contact drives the interlocking member connecting rod 61 to move downward together.

[0090] For example: See Figure 4 and Figure 5 The example shown, Figure 4 30 in Figure 5 The interlocking connecting rod 62 in the middle, when the contactor connected to 30 is energized and attracted, drives 30 to move downward, that is, drives Figure 5 62 in the downward movement, by Figure 5 From the structural relationship, it can be seen that when 62 moves downward, the two normally closed contacts 51 and 52 that were originally closed will be disconnected.

[0091] At this time, close the switch QS2 again. The KM2 coil control circuit cannot be energized because K2 is disconnected, that is, the circuit cannot be self-locking, the contactor KM2 coil is not energized, and the KM2 main normally open contact does not close.

[0092] When the control coil of one of the contactors KM1 is energized, the KM1 coil control circuit can remain energized and will not be affected by the disconnection of K1; at this time, the coil control circuit of the other contactor KM2 will not be energized due to the disconnection of K2, and thus cannot be attracted, thus effectively realizing the interlocking function.

[0093] The second interlocking situation: when the switch QS2 is closed first, the contactor KM2 will be energized and closed, K1 and K2 will be disconnected, the coil of the contactor KM1 will be disconnected because of its coil control circuit, and the main normally open contact of KM1 will not operate, that is, the electrical interlocking function of the two contactors can be realized at this time.

[0094] Among them, contactors KM1 and KM2 can choose any one of the upper and lower groups of terminal blocks of the interlocking element without being affected; this can avoid the disadvantage that the upper and lower layers of terminal blocks of some interlocking parts must be connected to specific contactors. If the wrong connection order occurs, it will cause the contactor to malfunction and cause electrical safety accidents.

[0095] In the non-interlocking working mode, when the rotary knob switch SW is in a closed state, the electrical interlocking function is not performed. For details, please refer to the following exemplary description.

[0096] First close the switch QS1, the coil of the micro relay KA1 in the KM1 coil control circuit is short-circuited, the KM1 coil is directly energized, and the KM1 main contact is attracted; then close the switch QS2, the coil of the micro relay KA2 in the KM2 coil control circuit is short-circuited, the KM1 coil is directly energized, and the KM1 main contact is attracted; that is, at this time, the two contactor control circuits can be independently operated at the same time without being restricted by interlocking.

[0097] When the knob switch SW is turned to the closed state, the interlocking part no longer has the interlocking function. When one of the contactors KM1 is energized and attracted, the other contactor KM2 can still be attracted when the control coil is energized, that is, KM1 and KM2 can work at the same time; the conversion from "interlocking mode" to "non-interlocking mode" is realized, which meets the needs of actual engineering applications to the greatest extent.

[0098] Since the processing and functions implemented by the contactor assembly of this embodiment are basically corresponding to the aforementioned Figure 1 The embodiments, principles and examples of the device shown are as follows. Therefore, for matters not fully described in the description of this embodiment, reference can be made to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be given here.

[0099] A large number of tests have verified that by adopting the technical solution of the present invention, by providing two miniature relays with normally open contacts in the internal circuit of the interlocking element, local self-locking can be formed in the corresponding contactor coil control circuit when power is turned on, which can simplify the production electrical wiring operation and reduce the wiring error rate.

[0100] According to an embodiment of the present invention, there is also provided an interlocking control method of a contactor assembly corresponding to the contactor assembly, such as Figure 6 The schematic flow chart of an embodiment of the method of the present invention is shown. The interlocking control method of the contactor assembly may include: steps S110 to S150.

[0101] At step S110, the coil control circuit of the first contactor is connected through the first terminal. The first terminal is such as the lower terminal 20 of the interlocking member. The first contactor is a contactor in the contactor assembly to be interlocked, such as the contactor KM1.

[0102] At step S120, the coil control circuit of the second contactor is connected through the second terminal. The second terminal is such as the upper terminal 10 of the interlocking member. The second contactor is another contactor in the contactor assembly to be interlocked, such as contactor KM2.

[0103] For example: a new interlocking method is adopted by setting up a micro relay with auxiliary contacts and a mechanical transmission device inside the interlocking part, which solves the problem of abnormal "attract-disconnect-attract-disconnect" phenomenon when the wiring sequence of the upper and lower terminals of the traditional interlocking part is changed; by setting two terminals, the normal interlocking function can be achieved no matter which layer of the upper and lower terminals the coil control circuit of one of the contactors is connected to during wiring, thereby achieving the effect of avoiding electrical safety hazards caused by wiring errors.

[0104] In step S130, the coil control circuit of the first contactor is controlled by the first relay, such as a first micro relay KA1 with auxiliary contacts.

[0105] At step S140, the coil control circuit of the second contactor is controlled by the second relay, such as the second micro relay KA2 with auxiliary contacts.

[0106] For example, two micro relays KA1 and KA2 with normally open contacts are provided in the internal circuit of the interlocking element, which can be used to form a local self-locking in the corresponding contactor coil control circuit when the power is turned on. Thus, it can mainly solve the problem that some interlocking element wiring needs to clearly distinguish which contactor coil control circuit the upper and lower wiring terminals should be connected to, which can simplify the production electrical wiring operation and reduce the wiring error rate.

[0107] At step S150, the control unit, in the interlocking mode, operates when either the first contactor or the second contactor is powered on, and controls the first switch and the second switch to be opened or closed simultaneously, so as to realize the interlocking control of the first contactor and the second contactor. The control unit may be a mechanical transmission device. The control unit is respectively arranged in cooperation with the first contactor, the second contactor, the first auxiliary contactor and the second auxiliary contactor.

[0108] For example: two normally closed contacts K1 and K2 are set inside the interlocking element, and their opening and closing are directly controlled by a mechanical linkage device. The interlocking of the entire circuit is achieved by introducing mechanical transmission feedback of the main normally open contacts of the external contactor into the circuit. This design of mechanical transmission combined with electrical control enables the contact interlocking part of the present invention to have two relatively independent contactor coil control circuit control units. Thus, the problem of abnormal start and stop of the contactor and the whole machine load after power-on can be solved when the wiring circuit of some interlocking elements is selected incorrectly, and the risk of electrical safety accidents can be avoided.

[0109] For example: a new interlocking method is adopted by setting up a micro relay with auxiliary contacts and a mechanical transmission device inside the interlocking part, which solves the problem of abnormal "attract-disconnect-attract-disconnect" phenomenon when the wiring sequence of the upper and lower terminals of the traditional interlocking part is changed; by setting two terminals, the normal interlocking function can be achieved no matter which layer of the upper and lower terminals the coil control circuit of one of the contactors is connected to during wiring, thereby achieving the effect of avoiding electrical safety hazards caused by wiring errors.

[0110] Thus, by combining the transmission structure with two relays, interlocking control of two contactors to be interlocked can be achieved, and wiring errors can be avoided by providing two wiring terminals.

[0111] In an optional embodiment, it may also include: switching the working mode of the interlocking control method through a selection unit respectively arranged in cooperation with the first interlocking unit and the second interlocking unit, and the working mode may include an interlocking mode and a non-interlocking mode.

[0112] Wherein, in the interlocking mode, the interlocking control of the first contactor and the second contactor can be realized by the control unit. In the non-interlocking mode, the interlocking control of the first contactor and the second contactor is released by the control unit.

[0113] For example: a selection switch SW is set inside the interlocking part to connect to the internal circuit. If the selection switch SW is closed by rotating it, when one of the contactors KM1 is energized and attracted, the other contactor KM2 can still be energized and attracted, that is, the interlocking constraint of the two contacts is shielded in electrical logic, and the two working modes of "interlocking" and "non-interlocking" can be freely converted, which solves the problem of complex disassembly and modification of electrical components when realizing the mode conversion, greatly improves the circuit modification efficiency, and thus solves the problem that circuits using some interlocking elements cannot be quickly and easily converted to non-interlocking mode.

[0114] Therefore, by setting up the selection unit, while ensuring that the circuit interlocking function can be realized, the difficulty of production wiring can be effectively reduced, production efficiency can be improved, and the risk of electrical safety accidents caused by incorrect wiring of interlocking parts can be avoided. At the same time, it can also more conveniently realize the conversion of the original circuit from electrical interlocking mode to non-electrical interlocking mode.

[0115] Since the processing and functions implemented by the method of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned contactor assembly, for the details not fully described in the description of this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0116] After a large number of tests and verifications, the technical solution of this embodiment is adopted. By setting a selection switch inside the interlocking part to access the internal circuit, if the selection switch is rotated to close it, when one of the contactors is energized and attracted, the other contactor can still be energized and attracted, that is, the interlocking constraint of the two contacts is shielded in electrical logic, and the two working modes of "interlocking" and "non-interlocking" can be freely converted, which can greatly improve the efficiency of circuit transformation.

[0117] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0118] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. An interlocking control device, characterized in that: include: A first interlocking unit, a second interlocking unit and a control unit; The first interlocking unit comprises: a first wiring terminal, a first relay and a first switch; the second interlocking unit comprises: a second wiring terminal, a second relay and a second switch; wherein, A first wiring terminal is used to connect the coil control circuit of the first contactor; the number of the first wiring terminals is a pair; The second wiring terminal is used to connect the coil control circuit of the second contactor; the number of the second wiring terminal is a pair; The first relay is used to control the coil control circuit of the first contactor; the first relay comprises: a coil and a normally open contact; the normally open contact of the first relay is connected in parallel with the first switch; wherein the first end of the coil of the first relay is connected to one of the pair of first wiring terminals; the second end of the coil of the first relay is connected to the other of the pair of first wiring terminals after passing through the first switch; A second relay is used to control the coil control circuit of the second contactor; the second relay comprises: a coil and a normally open contact; the normally open contact of the second relay is connected in parallel with the second switch; wherein the first end of the coil of the second relay is connected to one of the pair of second wiring terminals; the second end of the coil of the second relay is connected to the other of the pair of second wiring terminals after passing through the second switch; The control unit is used to operate in the interlocking mode when any one of the first contactor and the second contactor is energized and operates, and control the simultaneous opening or closing of the first switch and the second switch to achieve interlocking control of the first contactor and the second contactor.

2. The interlocking control device according to claim 1, characterized in that: One first terminal in the pair of first terminals is connected to a first end of a coil in a coil control circuit of a first contactor; the other first terminal in the pair of first terminals is connected to a second end of the coil in the coil control circuit of the first contactor; One of the pair of second wiring terminals is connected to the first end of the coil in the coil control circuit of the second contactor; the other of the pair of second wiring terminals is connected to the second end of the coil in the coil control circuit of the second contactor.

3. The interlocking control device according to claim 2, characterized in that: The pair of first connecting terminals is a first group of connecting terminals, and the pair of second connecting terminals is a second group of connecting terminals.

4. The interlocking control device according to claim 2 or 3, characterized in that: The first switch is linked to the control unit; the second switch is linked to the control unit.

5. The interlocking control device according to claim 2 or 3, characterized in that: The control unit comprises: a mechanical transmission device, a first assembly end and a second assembly end, wherein the first assembly end and the second assembly end are respectively arranged at two ends of the mechanical transmission device; A mechanical transmission device is respectively arranged in linkage with the first switch and the second switch; The first assembly end is connected to a linkage mechanism of a group of normally open contacts of the first contactor; the second assembly end is connected to a linkage mechanism of a group of normally open contacts of the second contactor.

6. The interlocking control device according to claim 4, characterized in that: Also includes: Select unit; The selection unit is respectively arranged in cooperation with the first interlocking unit and the second interlocking unit, and is used to switch the working mode of the interlocking control device, and the working mode includes an interlocking mode and a non-interlocking mode; Wherein, in the interlocking mode, the interlocking control of the first contactor and the second contactor can be realized by the control unit; In the non-interlocking mode, the interlocking control of the first contactor and the second contactor is released by the control unit.

7. The interlocking control device according to claim 6, characterized in that: The selection unit includes: a selection switch; the selection switch is connected to the first interlocking unit and the second interlocking unit respectively, and is used to simultaneously control the working modes of the first interlocking unit and the second interlocking unit; the working modes include: a mode that can achieve interlocking, or a mode in which interlocking has been released.

8. A contactor assembly, characterized in that: include: The interlocking control device according to any one of claims 1 to 7; The interlocking control device is sandwiched between the first contactor and the second contactor.

9. An interlocking control method for a contactor assembly as claimed in claim 8, characterized in that: include: Connecting a coil control circuit of a first contactor via a first wiring terminal; Connecting the coil control circuit of the second contactor via the second wiring terminal; Controlling the coil control circuit of the first contactor through the first relay; Controlling the coil control circuit of the second contactor through the second relay; Through the control unit, in the interlocking mode, when any one of the first contactor and the second contactor is energized, it will act, and the first switch and the second switch will be controlled to be opened or closed at the same time, so as to realize the interlocking control of the first contactor and the second contactor.

10. The interlocking control method according to claim 9, characterized in that: Also includes: Switching the working mode of the interlocking control method by means of a selection unit respectively arranged in cooperation with the first interlocking unit and the second interlocking unit, the working mode including the interlocking mode and the non-interlocking mode; Wherein, in the interlocking mode, the interlocking control of the first contactor and the second contactor can be realized by the control unit; In the non-interlocking mode, the interlocking control of the first contactor and the second contactor is released by the control unit.

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