CN107329031B - Junction Sequencing Device - Google Patents

Abstract

The invention relates to a junction sequencing device, and relates to the technical field of automatic testing. The technical solution mainly adopted is: a contact sequencing device, which includes: a common terminal terminal and N terminal terminals, a sequencing circuit and a display module; The first terminal to the Nth terminal are used in turn to connect with the M alarm connection points that the circuit breaker will alarm in the process of driving pressure drop; the display module is respectively connected with the first logic circuit output terminal to the Nth logic circuit output terminal Connection, used to display the connection sequence from the first logic circuit to the Nth logic circuit; wherein, N is a positive integer greater than or equal to 3, and M is a positive integer greater than or equal to 2 and less than N. The contact sequencing device provided by the present invention can automatically and quickly sequence the connection sequence of the alarm contacts of the hydraulic high-voltage circuit breaker.

Description

Junction Sequencing Device

technical field

The invention relates to the technical field of automated testing, in particular to a junction sequencing device.

Background technique

A circuit breaker is a switch used to cut off the circuit, connect the load circuit and cut off the fault circuit. It can prevent accidents from expanding and ensure safe operation. Therefore, circuit breakers are widely used, especially in substations, where high-voltage circuit breakers are often used to ensure the safe operation of the substation.

Among them, there are many forms of high-voltage circuit breakers, and the hydraulic form of high-voltage circuit breakers is the more commonly used one. For hydraulic form of high-voltage circuit breakers, only when a certain hydraulic pressure is met can the high-voltage circuit breaker work normally, so its own setting There are multiple alarm contacts with different pressures, such as the lock reclose connection point, the lock close connection point, and the lock open contact. The staff will carry out maintenance or replacement, so during the commissioning process of the new substation, it is necessary to carry out the single detection of the high-voltage circuit breaker's own signal to prevent the wrong alarm indication and misleading due to the dislocation of the internal alarm contact connection of the high-voltage circuit breaker. The staff perform wrong operations to prevent accidents.

However, in the prior art, the testing of each alarm contact of the hydraulic high-voltage circuit breaker is performed manually, and the above-mentioned alarm contacts are tested by gradually reducing the hydraulic pressure supplied to the high-voltage circuit breaker by the staff. The process operation is complicated and inefficient.

Contents of the invention

The main purpose of the present invention is to provide a new type of contact sequencing device. The technical problem to be solved is to enable it to automatically and quickly sequence the connection sequence of the alarm contacts of the hydraulic high-voltage circuit breaker.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to a junction sequencing device proposed by the present invention, it includes:

The common terminal terminal and N terminal terminals, the common terminal terminal is used to connect the common connection terminal of the circuit breaker, and the first terminal to the Nth terminal of the N terminal terminals are used in turn to communicate with the circuit breaker The M alarm connection points that alarm sequentially during the driving pressure drop are connected;

A sequencer circuit, the sequencer circuit includes N logic circuits, each logic circuit includes N branches, and in the N logic circuits, the first logic circuit input terminal to the Nth logic circuit input terminal are sequentially connected with the first terminal to the Nth logic circuit input terminal. The Nth terminal is connected, and each branch is provided with a relay, and the relay includes N normally closed switches and at least one normally open switch;

A display module, the display module is respectively connected with the output end of the first logic circuit to the output end of the Nth logic circuit, and is used to display the connection sequence from the first logic circuit to the Nth logic circuit;

Wherein, the relay input terminal of the first branch of the first logic circuit is connected to the first terminal, and a normally closed switch of the relay of the first branch of the first logic circuit is set on the second branch of the first logic circuit. The N-1 normally closed switches of the relays of the first branch of the first logic circuit are respectively set on the first branch of the second logic circuit to the first branch of the Nth logic circuit, and the connection method is analogized To the N-1 branch of the first logic circuit, the N-th branch input of the first logic circuit is connected to a normally closed switch of the relay of the N-1 branch of the first logic circuit, and the N-1 branch of the first logic circuit is connected to the N-1 branch of the first logic circuit. The normally open switch of the relay of the first branch of a logic circuit to the normally open switch of the Nth branch of the relay forms the output end of the first logic circuit;

And, the second logic circuit to the Nth logic circuit are set according to the logic mode of the first logic circuit;

Wherein, N is a positive integer greater than or equal to 3, and M is a positive integer greater than or equal to 2 and less than or equal to N.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

Preferably, the aforementioned contact sequencing device, wherein the number of the terminals is 4, the first terminal of the 4 terminals is used to connect with the locking reclosing alarm connection point of the circuit breaker, and the second terminal is used for It is connected to the lock-off alarm connection point of the circuit breaker, the third terminal is used to connect to the first lock-off alarm connection point of the circuit breaker, and the fourth terminal is used to connect to the second lock-off alarm connection point of the circuit breaker Click to connect.

Preferably, the aforementioned junction sequencing device, wherein the sequencing circuit includes 4 logic circuits, and each logic circuit includes 4 branches, and the input terminal of the first logic circuit to the input terminal of the fourth logic circuit are sequentially connected to the first post to terminal 4 connection;

The relay includes 4 normally closed switches and at least one normally open switch.

Preferably, in the aforementioned junction sequencing device, two relays are arranged on each branch, and the two relays are connected in series, and the relays are two-open and two-close relays.

Preferably, the aforementioned junction sequencing device, wherein the display module includes N BCD decoders and N digital display tubes;

The input terminals of the N BCD decoders are respectively connected to the output terminals of the N logic circuits, and the output terminals of the N BCD decoders are respectively connected with the N digital display tubes for sequencing The conduction sequence of the N logic circuits of the circuit is displayed through the digital display tube.

Preferably, the aforementioned junction sequencing device, wherein the display module includes 4 BCD decoders and 4 digital display tubes;

The input terminals of the four BCD decoders are respectively connected with the output terminals of the four logic circuits, and the output terminals of the four BCD decoders are respectively connected with the four digital display tubes for disconnecting the circuit. The conduction sequence of the block reclosing alarm connection point of the circuit breaker, the block closing alarm connection point of the circuit breaker, the first block opening alarm connection point of the circuit breaker and the second block opening alarm connection point of the circuit breaker are displayed.

Preferably, the aforementioned contact sequencing device, wherein the output terminal of the first logic circuit includes a normally open switch of the relay of the first branch of the first logic circuit to a normally open switch of the relay of the fourth branch;

Wherein, the normally open switch output end of the relay of the third branch of the first logic circuit is connected to the normally open switch output end of the relay of the first branch of the first logic circuit by connecting the first diode, and then connected with the input end of the BCD decoder;

And, the normally open switch output end of the relay of the third branch of the first logic circuit is connected to the normally open switch output end of the relay of the second branch of the first logic circuit by connecting the second diode, and then connected with the input end of the BCD decoder;

The connection mode from the output terminal of the second logic circuit to the output terminal of the fourth logic circuit and the input terminal of the BCD decoder is set according to the connection mode between the output terminal of the first logic circuit and the input terminal of the BCD decoder.

Preferably, the aforementioned junction sequencing device also includes:

A power supply, the power supply is connected to the sequencing circuit and the display module, and is used to supply power to the junction sequencing device.

Preferably, the aforementioned junction sequencing device, wherein the power supply is a DC power supply powered by a dry battery.

Preferably, the aforementioned junction sequencing device also includes:

The casing, the common terminal terminal and the N terminals are all arranged on the outer surface of the casing, the sequencing circuit is arranged inside the casing, and the display module is arranged on the outer surface of the casing , the power supply is arranged inside the casing.

With the above technical solution, the junction sequencing device of the present invention has at least the following advantages:

In the technical solution of the present invention, the contact sequencing device is provided with N terminals, and with the cooperation of the sequencing circuit, it can detect the connection sequence of the alarm contacts of the circuit breaker with M alarm contacts. Compared with the prior art, the testing of each alarm contact of the hydraulic high-voltage circuit breaker is manual operation, and the above-mentioned alarm contacts are tested by the staff gradually reducing the hydraulic pressure supplied to the high-voltage circuit breaker, and the test process takes a long time , the testing process is complicated and inefficient. The contact sequencing device provided by the present invention can directly reduce the hydraulic pressure of the circuit breaker from the optimal working pressure to zero pressure, and then through the contact sequencing device provided by the present invention, the connection of the alarm contacts of all circuit breakers can be performed at one time. It is detected sequentially, with fast detection speed and high efficiency, and there is no need for staff to operate during the detection process, and the degree of automation is high.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below.

Description of drawings

Fig. 1 is a schematic diagram of the electrical connection structure of a junction sequencing device provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a junction sequencing device provided by an embodiment of the present invention;

3 is a schematic diagram of connection of a sequencing circuit of a junction sequencing device provided by an embodiment of the present invention;

Fig. 4 is a schematic connection diagram of a display module of a junction sequencing device provided by an embodiment of the present invention.

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, characteristics and effects of the junction sequencing device proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. The details are as follows. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

As shown in Fig. 1 and Fig. 2, a kind of joint sequencing device that one embodiment of the present invention proposes, it comprises: common terminal terminal post 1 and N terminal post 2, sequencing circuit 3 and display module 4; Common terminal terminal post 1 is used to connect the common connection terminal 71 of the circuit breaker 7, the first terminal to the Nth terminal of the N terminals 2, which are sequentially used for the M alarm connection points of the circuit breaker 7 to alarm in the process of driving pressure drop Connection; the sequencing circuit 3 includes N logic circuits, each logic circuit includes N branches, and in the N logic circuits, the input terminal of the first logic circuit to the input terminal of the N logic circuit is sequentially connected with the first terminal to the N terminal Each branch is provided with a relay, and the relay includes N normally closed switches and at least one normally open switch; the display module is respectively connected with the output terminal of the first logic circuit to the output terminal of the Nth logic circuit, and is used to display the first logic circuit The connection sequence of the circuit to the Nth logic circuit; wherein, the relay input terminal of the first branch of the first logic circuit is connected to the first terminal, and a normally closed switch of the relay of the first branch of the first logic circuit is set on the first The input terminal of the second branch of the logic circuit, the N-1 normally closed switches of the relay of the first branch of the first logic circuit are respectively arranged on the first branch of the second logic circuit to the first branch of the Nth logic circuit, so as to This connection mode is analogized to the N-1 branch of the first logic circuit, the N-th branch input of the first logic circuit is connected to a normally closed switch of the relay of the N-1 branch of the first logic circuit, the first logic The normally open switch of the relay of the first branch of the circuit to the normally open switch of the Nth branch of the relay constitutes the output end of the first logic circuit; and, the second logic circuit to the N logic circuit follow the logic mode of the first logic circuit Set; where, N is a positive integer greater than or equal to 3, and M is a positive integer greater than or equal to 2 and less than or equal to N.

Specifically, the junction sequencing device provided by the present invention is capable of sequencing the order in which the warning connection points are connected to circuit breakers whose number of warning connection points is less than or equal to N. The usage mode and usage principle of the contact sequencing device provided by the present invention: firstly connect the multiple alarm connection points of the circuit breaker to the first terminal to the Nth terminal according to the order of pressure when they are connected; The circuit breaker performs pressure storage; when the energy storage is over, the circuit breaker is depressurized, so that the circuit breaker drops from the normal working pressure to zero pressure. During this process, the M alarm connection contacts of the circuit breaker are respectively connected. When an alarm connection point is connected, the logic circuit connected behind the corresponding connection column will be connected. During the sequential connection of the logic circuits, the first connected P logic circuit (P is a positive integer less than or equal to N) will be connected. The first branch will be connected, and the relays on the first branch will be connected at the same time. At this time, the normally closed switch of the relay on the first branch will be opened, and the normally open switch will be closed. The first branch of the logic circuit is all disconnected, the second branch to the last branch of the P logic circuit will also be disconnected, and finally the relay normally open switch of the first branch of the P logic circuit at the output end Closed, the output signal is correspondingly displayed in the display module, for example, the number 1 is displayed; by analogy with the above method, the logic circuits connected to the M alarm connection contacts of the circuit breaker are respectively connected, and the sequence of each logic circuit is connected. The display module is displayed, and then realizes the measurement of the connection sequence of the M alarm connection points; finally, compares whether the connection sequence of the M alarm points of the circuit breaker is the same as that of the circuit breaker alarm points during the pressure drop process, and if it is different, it proves that If there is an error in the internal circuit connection of the circuit breaker, at the same time, it can be deduced according to the sequencing results which two alarm points are connected incorrectly, which can guide the subsequent maintenance of the circuit breaker.

In the technical solution of the present invention, the contact sequencing device is provided with N terminals, and with the cooperation of the sequencing circuit, it can detect the connection sequence of the alarm contacts of the circuit breaker with M alarm contacts. Compared with the prior art, the testing of each alarm contact of the hydraulic high-voltage circuit breaker is manual operation, and the above-mentioned alarm contacts are tested by the staff gradually reducing the hydraulic pressure supplied to the high-voltage circuit breaker, and the test process takes a long time , the testing process is complicated and inefficient. The contact sequencing device provided by the present invention can directly reduce the hydraulic pressure of the circuit breaker from the optimal working pressure to zero pressure, and then through the contact sequencing device provided by the present invention, the connection of the alarm contacts of all circuit breakers can be performed at one time. It is detected sequentially, with fast detection speed and high efficiency, and there is no need for staff to operate during the detection process, and the degree of automation is high.

As shown in Figure 2, in the actual implementation, wherein the optimal number of terminals is 4, the first terminal 21 of the 4 terminals is used to connect with the locking reclosing alarm connection point 72 of the circuit breaker 7, the second The terminal 22 is used to connect with the locking and closing alarm connection point 73 of the circuit breaker 7, the third terminal 23 is used to connect with the first locking and opening alarm connection point 74 of the circuit breaker 7, and the fourth terminal 24 is used to connect with the The second locking and opening alarm connection point 75 of the circuit breaker 7 is connected.

Specifically, since the hydraulic circuit breakers commonly used in the prior art mostly have a structure of 4 alarm connection points, it is best to set the number of terminal posts to 4; at the same time in the contact sequencing device provided by the present invention The arrangement of four logic circuits can make the junction sequencing device provided by the present invention smaller in size and convenient for users to carry and operate.

In the specific implementation, a preferred embodiment is that the junction sequencing device has a structure of 4 binding posts, as shown in Figure 3, the sequencing circuit preferably includes 4 logic circuits, and each logic circuit includes 4 branch terminals. Road, the input terminals of the first logic circuit 31, the second logic circuit 32, the third logic circuit 33 and the fourth logic circuit 34 are sequentially connected with the first terminal 21, the second terminal 22, the third terminal 23 and the fourth terminal Terminal 24 is connected; the relay contains 4 normally closed switches and at least one normally open switch. As shown in Fig. 3 and Fig. 4, the display module 4 is connected with the output terminals of the first logic circuit 31, the second logic circuit 32, the third logic circuit 33 and the fourth logic circuit 34 respectively, for displaying the first logic circuit 31 To the connection sequence of the fourth logic circuit 34; wherein, the relay input terminal of the first branch 311 of the first logic circuit 31 is connected with the first terminal 21, one of the relays of the first branch 311 of the first logic circuit 31 The normally closed switch is arranged on the input end of the second branch 312 of the first logic circuit 31, and the three normally closed switches of the relay of the first branch 311 of the first logic circuit 31 are respectively arranged on the first branch of the second logic circuit 32 On the first branch of the fourth logic circuit 34, the connection mode is analogized to the third branch 313 of the first logic circuit 31, the fourth branch 314 input terminal of the first logic circuit 31 is connected with the first logic circuit 31 A normally closed switch of the relay of the three branches 313 is connected, a normally open switch of the relay of the first branch 311 of the first logic circuit 31 is formed, and a normally open switch of the relay of the fourth branch 314 of the first logic circuit 31 is formed The output terminal of the first logic circuit 31 ; and, the second logic circuit 32 to the fourth logic circuit 34 are set according to the logic mode of the first logic circuit 31 .

According to the above logic method, the sequencing circuit specifically shown in FIG. 3 can be obtained, wherein the first branch 311 of the first logic circuit 31 includes two series connected relays 1A1 and 1A2, and the two relays 1A1 and 1A2 include two normally closed Switch 1A1, two normally closed switches 1A2, the connection mode of these switches is as shown in Figure 3; the second branch 312 of the first logic circuit 31 comprises two relays 2A1 and 2A2 connected in series, and the two relays 2A1 and 2A2 comprise two A normally closed switch 2A1 and two normally closed switches 2A2, the connection mode of these normally closed switches can also be shown from Fig. 3; the third branch 313 of the first logic circuit 31 includes two relays 3A1 and 3A2 connected in series , the two relays 3A1 and 3A2 include two normally closed switches 3A1 and two normally closed switches 3A2, the connection mode of these normally closed switches can also be shown from Figure 3; the fourth branch 314 of the first logic circuit 31 includes Two relays 4A1 and 4A2 in series, two relays 4A1 and 4A2; in summary, the connection mode of the first logic circuit 31, the logic connection mode of the second logic circuit 32, the third logic circuit 33 and the fourth logic circuit 34 are all Same as the first logic circuit 31, the relay connection mode in the second logic circuit 32, the third logic circuit 33 and the fourth logic circuit 34 as shown in Figure 3 is exactly the same as that of the first logic circuit 31, only the name of the relay and The names of the relay switches are different, which can be understood corresponding to FIG. 3 , and the relay connection modes in the second logic circuit 32 , the third logic circuit 33 and the fourth logic circuit 34 will not be described too much here.

Furthermore, for a logic circuit with 4 branches, it is best to set two relays on each branch, and the two relays are connected in series. The relay is a two-open and two-close relay, because two-open and two-close relays are commonly used Relays are small in size and cheap in price. In this way, the overall volume of the logic circuit composed of two open and two closed relays is small. Even if the total number of relays in four logic circuits is only 32, the overall volume of the sequencing circuit is small and the contact sequencing The overall volume of the device is small, which is convenient for the user to carry and is more convenient to use.

As shown in Figure 4, in the specific implementation, wherein the display module 4 includes N BCD decoders 41 and N digital display tubes 42; the input terminals of N said BCD decoders 41 are respectively connected with the N logic circuits The output ends are connected, and the output ends of the N BCD decoders 41 are respectively connected to the N digital display tubes 42 , which are used to display the conduction sequence of the N logic circuits of the sequencing circuit through the digital display tubes 42 . The signal when the logic circuit is connected can be processed by using a BCD decoder. The BCD decoder used in the junction sequencing device of the present invention is a commonly used decoder in the prior art and can be directly purchased from the market.

Further, the optimal structural form of the display module is a structural form that is compatible with the structural form of the above-mentioned sequencing device having 4 binding posts, that is, a display module that matches the sequencing circuit containing 4 logic circuits. As shown in Figure 4, in the actual implementation, for the above-mentioned 4 logic circuits, wherein the display module 4 also includes 4 BCD decoders 41 and 4 digital display tubes 42; 4 BCD decoders The input terminals of 41 are respectively connected with the output terminals of four logic circuits, and the output terminals of four BCD decoders 41 are respectively connected with four digital display tubes 42, which are used to connect the locking reclosing alarm connection point of the circuit breaker, the circuit breaker The conduction sequence of the locking and closing alarm connection point of the circuit breaker, the first locking and opening alarm connection point of the circuit breaker and the second locking and opening alarm connection point of the circuit breaker are displayed. Specifically, 4 BCD decoders correspond to 4 logic circuits, and are mainly used for sequencing circuit breakers with 4 alarm connection points. The BCD decoder receives the conduction of different branches of the 4 logic circuits The electric signal is used for decoding, and then the digital display tube is driven to display the sequential numbers corresponding to different branches, and the digital display tube displays the four numbers 1-4 respectively.

Further, since the display module is used to display the sequencing results of the sequencing circuit, as shown in Figure 3 and Figure 4, in specific implementation, the output terminal of the first logic circuit 31 includes the output terminal of the first logic circuit 31 The normally open switch 1A1 of the relay 1A1 of the first branch 311, the normally open switch 2A1 of the relay 2A1 of the second branch 312 of the first logic circuit 31, the normally open switch 2A1 of the relay 3A1 of the third branch 313 of the first logic circuit 31 Open switch 3A1 and the normally open switch 4A1 of the relay 4A1 of the fourth branch 314 of the first logic circuit 31, these normally open switches are used as the output end of the first logic circuit 31, and its connection mode is as shown in Figure 4, and the second The output ends of logic circuit 32, the 3rd logic circuit 33 and the 4th logic circuit 34 are also made up of the normally open switch of its own relay, and the connection mode of output terminal is also the same as the connection mode of first logic circuit 31, as shown in Fig. 4 What is shown is only the name of the normally open switch is different, and will not be described in detail here, and the specific connection method can be obtained by comparing Figure 3 and Figure 4.

And, the connection mode between the output terminal of the first logic circuit 31 and the output terminal of the fourth logic circuit 34 and the BCD decoder is all the same, and the output terminals of these four logic circuits are all connected by the same connection mode. After synthesizing the three connection ends, they are connected by BCD decoder 41 . For example, after the normally open switch 3A1 of the relay 3A1 of the third branch 313 of the first logic circuit 31 is connected to the first diode, it is connected with the normally open switch 1A1 of the relay 1A1 of the first branch 311 of the first logic circuit 31. The output terminal is connected, and then connected with the input terminal of the BCD decoder 41, and the output terminal of the normally open switch 3A1 of the relay 3A1 of the third branch 313 of the first logic circuit 31 is connected with the first diode after connecting the second diode. The output end of the normally open switch 2A1 of the relay 2A1 of the second branch 312 of the logic circuit 31 is connected, and then connected with the input end of the BCD decoder 41; the kneading mode of the output end of the second logic circuit 32 to the fourth logic circuit 34 is the same , you can refer to the connection mode in FIG. 4 , which will not be described in detail here.

As shown in Figure 1, Figure 3 and Figure 4, in the specific implementation, the junction sequencing device also includes: a power supply 5, which is connected to the sequencing circuit 3 and the display module 4, and is used to supply power for the junction sequencing device; the power supply 5 is DC Power supply, powered by dry batteries.

Specifically, in order to make the junction sequencing device portable so that it can work in any occasion, it is necessary to provide a portable power supply for the junction sequencing device, because only a plurality of relays and BCD decoders are involved in the junction sequencing device provided by the present invention. And digital display tubes, so the voltage and current required by the contact sequencing device provided by the present invention are small, so it can be powered by using multiple dry appliances connected in series.

As shown in Figure 2, in the specific implementation, the junction sequencing device also includes: a housing 6, the common terminal terminal 1 and N terminal terminals 2 are all arranged on the outer surface of the housing 6, and the sequencing circuit is arranged inside the housing 6 , the display module is arranged on the outer surface of the casing 6 , and the power supply is arranged inside the casing 6 .

Specifically, the sequencing circuit and the power supply that need to be electrically connected are housed by using the casing, which can effectively protect the sequencing circuit and power supply, and at the same time integrate all components, making the contact sequencing device easy to carry and move; the casing can The metal material can also be used to make the plastic material, and the outer structure of the housing is not limited.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the present invention. within the scope of the technical solution of the invention.

Claims (8)

1. A junction sequencing device, characterized in that it comprises: The common terminal terminal and N terminal terminals, the common terminal terminal is used to connect the common connection terminal of the circuit breaker, and the first terminal to the Nth terminal of the N terminal terminals are used in turn to communicate with the circuit breaker The M alarm connection points that alarm sequentially during the driving pressure drop are connected; A sequencer circuit, the sequencer circuit includes N logic circuits, each logic circuit includes N branches, and in the N logic circuits, the first logic circuit input terminal to the Nth logic circuit input terminal are sequentially connected with the first terminal to the Nth logic circuit input terminal. The Nth terminal is connected, and each branch is provided with a relay, and the relay includes N normally closed switches and at least one normally open switch; A display module, the display module is respectively connected with the output end of the first logic circuit to the output end of the Nth logic circuit, and is used to display the connection sequence from the first logic circuit to the Nth logic circuit; Wherein, the relay input terminal of the first branch of the first logic circuit is connected to the first terminal, and a normally closed switch of the relay of the first branch of the first logic circuit is set on the second branch of the first logic circuit. The N-1 normally closed switches of the relays of the first branch of the first logic circuit are respectively set on the first branch of the second logic circuit to the first branch of the Nth logic circuit, and the connection method is analogized To the N-1 branch of the first logic circuit, the N-th branch input of the first logic circuit is connected to a normally closed switch of the relay of the N-1 branch of the first logic circuit, and the N-1 branch of the first logic circuit is connected to the N-1 branch of the first logic circuit. The normally open switch of the relay of the first branch of a logic circuit to the normally open switch of the Nth branch of the relay forms the output end of the first logic circuit; And, the second logic circuit to the Nth logic circuit are set according to the logic mode of the first logic circuit; Wherein, N is a positive integer greater than or equal to 3, and M is a positive integer greater than or equal to 2 and less than or equal to N; The number of the terminals is 4, the first terminal of the 4 terminals is used to connect with the locking and reclosing alarm connection point of the circuit breaker, and the second terminal is used to connect with the locking and closing alarm of the circuit breaker Point connection, the third terminal is used to connect with the first locking and opening alarm connection point of the circuit breaker, and the fourth terminal is used to connect with the second locking and opening alarm connection point of the circuit breaker; A power supply, the power supply is connected to the sequencing circuit and the display module, and is used to supply power to the junction sequencing device. 2. The junction sequencing device according to claim 1, characterized in that, The sequencing circuit includes 4 logic circuits, and each logic circuit includes 4 branches, and the input end of the first logic circuit to the input end of the fourth logic circuit are sequentially connected to the first terminal to the fourth terminal; The relay includes 4 normally closed switches and at least one normally open switch. 3. The junction sequencing device according to claim 2, characterized in that, Two relays are arranged on each branch, and the two relays are connected in series, and the relays are two-open and two-close relays. 4. The junction sequencing device according to claim 1, characterized in that, The display module includes N BCD decoders and N digital display tubes; The input terminals of the N BCD decoders are respectively connected to the output terminals of the N logic circuits, and the output terminals of the N BCD decoders are respectively connected with the N digital display tubes for sequencing The conduction sequence of the N logic circuits of the circuit is displayed through the digital display tube. 5. The junction sequencing device according to claim 1, characterized in that, The display module includes 4 BCD decoders and 4 digital display tubes; The input terminals of the four BCD decoders are respectively connected with the output terminals of the four logic circuits, and the output terminals of the four BCD decoders are respectively connected with the four digital display tubes for disconnecting the circuit. The conduction sequence of the block reclosing alarm connection point of the circuit breaker, the block closing alarm connection point of the circuit breaker, the first block opening alarm connection point of the circuit breaker and the second block opening alarm connection point of the circuit breaker are displayed. 6. The junction sequencing device according to claim 5, characterized in that, The output terminal of the first logic circuit includes the normally open switch of the relay of the first branch of the first logic circuit to the normally open switch of the relay of the fourth branch; Wherein, the normally open switch output end of the relay of the third branch of the first logic circuit is connected to the normally open switch output end of the relay of the first branch of the first logic circuit by connecting the first diode, and then connected with the input end of the BCD decoder; And, the normally open switch output end of the relay of the third branch of the first logic circuit is connected to the normally open switch output end of the relay of the second branch of the first logic circuit by connecting the second diode, and then connected with the input end of the BCD decoder; The connection mode from the output terminal of the second logic circuit to the output terminal of the fourth logic circuit and the input terminal of the BCD decoder is set according to the connection mode between the output terminal of the first logic circuit and the input terminal of the BCD decoder. 7. The junction sequencing device according to claim 1, characterized in that, The power supply is a DC power supply, powered by a dry battery. 8. The junction sequencing device according to claim 1, further comprising: The casing, the common terminal terminal and the N terminals are all arranged on the outer surface of the casing, the sequencing circuit is arranged inside the casing, and the display module is arranged on the outer surface of the casing , the power supply is arranged inside the casing.