CN213278643U

CN213278643U - Special short circuit device for current loop

Info

Publication number: CN213278643U
Application number: CN202022649097.2U
Authority: CN
Inventors: 孙开军; 王磊
Original assignee: Guizhou Kanghe Technology Co ltd
Current assignee: Guizhou Kanghe Technology Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-05-25
Anticipated expiration: 2030-11-17

Abstract

The utility model discloses a current circuit short circuit isolated plant, including casing, electrically conductive unit and short circuit unit, electrically conductive unit intercommunication relay protection current loop sends the short circuit unit with the current conduction, realizes the short circuit to relay protection current loop by the short circuit unit. The device provides a to relay protection current loop short circuit isolated plant, easy operation safety has greatly practiced thrift electrician's wiring time to the difficult incident that takes place.

Description

Special short circuit device for current loop

Technical Field

The utility model relates to a relay protection technical field, especially a current loop short circuit isolated plant.

Background

At present, the field operation of relay protection has the following problems:

1. when one set of protection or safety automation equipment is stopped for testing and the primary equipment is not powered off, safety measures of other protection or safety automation equipment must be taken special attention due to the fact that current loops are connected in series, for example, the tail end of the related current loop is in short circuit, and misoperation of other protection or safety automation equipment or shutdown of current terminal equipment cannot be caused.

2. At present, no special tool for short circuit of the relay protection current loop exists. For a long time, the implementation of the safety measure of short circuit of the current secondary circuit is carried out by matching current short connecting pieces (wires) or test wires by two persons, the current circuit terminals of various manufacturers are designed differently, the current circuits of some manufacturers must be short-circuited by the test wires, the implementation process of the whole safety measure is long in time consumption, multiple steps are low in fault tolerance, any one process is not finished, the current circuits at operation intervals are likely to be opened, the operation risk is extremely high, the test wires used by the short circuit currents have the problems that the reliability is poor, the short circuit is easy to be mistakenly knocked and removed by people, and the like, and particularly the work of short circuit time of more than ten days is frequently required for the movement of stable connection adjustment and the like. Once the safety measure of the short circuit of the current loop fails, the serious consequences of false operation, failure operation, CT reverse charging, open circuit of the current loop, no waveform of fault recording (traveling wave) and the like of the protection or safety automatic equipment can be caused.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems occurring in the conventional current circuit shorting device.

Therefore, the utility model aims to solve the problem of how to provide a current loop short circuit isolated plant.

In order to solve the technical problem, the utility model provides a following technical scheme: a special short circuit device for a current loop comprises a shell, a short circuit device and a short circuit device, wherein an accommodating space is arranged in the shell; the conductive unit comprises a plurality of conductive pieces arranged in the accommodating space; and the short circuit unit comprises a plurality of conducting strips which are sequentially connected with the two conducting pieces, the conducting strips are not contacted with each other, and each conducting piece is only connected with one conducting strip.

As a preferred scheme of current loop short circuit isolated plant, wherein: the conductive piece comprises a conductive column arranged in the accommodating space and a conductive plug which is matched with the conductive column and extends out of the shell.

As a preferred scheme of current loop short circuit isolated plant, wherein: the shell is provided with a plurality of through holes matched with the conductive plugs, and the conductive plugs are detachably connected with the through holes.

As a preferred scheme of current loop short circuit isolated plant, wherein: one end of the conductive post is provided with a groove matched with the conductive piece, a first hole is formed in the groove, second holes corresponding to the first holes are formed in the two ends of the conductive piece, and the short-circuit unit further comprises a first screw in threaded fit with the first holes and the second holes.

As a preferred scheme of current loop short circuit isolated plant, wherein: and a second hole matched with the conductive plug is arranged on the conductive column.

As a preferred scheme of current loop short circuit isolated plant, wherein: and a convenient screwing piece is fixed on the conductive plug.

As a preferred scheme of current loop short circuit isolated plant, wherein: the shell comprises a shell and an end cover, and the through hole is formed in the shell.

As a preferred scheme of current loop short circuit isolated plant, wherein: one end of the conductive post is provided with a boss, the groove is formed in the boss, and the accommodating space comprises a first space matched with the conductive post and a second space matched with the conductive post.

As a preferred scheme of current loop short circuit isolated plant, wherein: the number of the conducting pieces is 8, one conducting piece is connected with the four conducting pieces positioned at the 1 st, 3 rd, 5 th and 7 th positions, and the other conducting piece is connected with the rest 4 conducting pieces.

As a preferred scheme of current loop short circuit isolated plant, wherein: the conducting strips are sequentially connected with four adjacent conducting pieces according to the same span.

The utility model has the beneficial effects of providing a to relay protection current loop short circuit isolated plant, easy operation safety has greatly practiced thrift electrician's wiring time to the incident is difficult for taking place.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

fig. 1 shows a short circuit of the first terminal arrangement sequence of the conventional protection circuit in example 1.

Fig. 2 shows a short circuit of the second terminal arrangement of the conventional protection circuit in example 1.

Fig. 3 is a view showing the arrangement of the current loop short dedicated device in example 1 with respect to the conductive sheet of fig. 1.

Fig. 4 shows the arrangement of the current loop shorting dedicated device of example 1 relative to the conductive strip of fig. 2.

Fig. 5 is a block diagram of a current loop short dedicated device in example 1.

Fig. 6 is a structure diagram of a case of a device dedicated to short-circuiting a current loop in example 1.

Fig. 7 is a matching diagram of the conducting strip and the conducting piece of the current loop short-circuit special device in the example 1.

Fig. 8 is a cross-sectional view of the current loop shorting dedicated device of example 1.

Fig. 9 is a schematic diagram of a screw of the special device for short-circuiting a current loop in example 1.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 ~ 9, for the utility model discloses a first embodiment, this embodiment provides a current loop short circuit isolated plant, and current loop short circuit isolated plant includes casing 100, electrically conductive unit 200 and short circuit unit 300, and electrically conductive unit 200 intercommunication relay protection current loop sends short circuit unit 300 with the current conduction, realizes the short circuit to relay protection current loop by short circuit unit 300.

Specifically, the conventional protection circuit has 8 terminals, and for convenience of description, the next 8 terminals are respectively named as: A. b, C, N, a, B, C, N, and in general, there are two cases in the terminal arrangement order: the first case is a cross-type arrangement, that is: A. a, B, B, C, C, N and N, wherein the short-circuit mode is shown in figure 1; the second case is a sequential type arrangement, i.e.: A. b, C, N, a, B, C and N, wherein the short-circuit mode is shown in figure 2; wherein the open circles in fig. 1 represent the cross-over without connection.

Specifically, the housing 100 is provided with an accommodating space 103 therein, which includes a casing 101 and an end cover 102, wherein the casing 101 and the end cover 102 are detachably connected, preferably by screws.

The conductive unit 200 includes a plurality of conductive members 201 disposed in the accommodating space 103, and the conductive members 201 are mainly used for communicating a relay protection current loop and conducting current to the short circuit unit 300.

A shorting unit 300, including a plurality of conductive sheets 301 sequentially connecting two conductive members 201, and the plurality of conductive sheets 301 are not in contact with each other, each conductive member 201 is connected to only one conductive sheet 301, since the conventional protection circuit has 8 connection terminals, the number of conductive members 201 in this embodiment is 8, the number of conductive sheets 301 is 4, when the terminals are arranged in the first case, the 8 conductive sheets (301) are sequenced from a certain direction, wherein one conductive sheet (301) is connected to four conductive members (201) located at the 1 st, 3 rd, 5 th and 7 th positions, the other conductive sheet (301) is connected to the remaining 4 conductive members (201), and the connection manner of the conductive sheet 301 and the conductive member 201 is as shown in fig. 3; when the terminals are arranged in the second condition, the conducting sheets (301) are connected with four adjacent conducting pieces (201) in sequence according to the same span, and the connecting mode of the conducting sheets 301 and the conducting pieces 201 is shown in figure 4. Therefore, the device is at least provided with two types, wherein one type is a cross type terminal short circuit, and the other type is a sequence type terminal short circuit.

Further, the conductive component 201 includes a conductive pillar 201a disposed in the accommodating space 103, and a conductive plug 201b that is matched with the conductive pillar 201a and extends out of the housing 100, where the conductive plug 201b is connected to an interface of a current loop of the relay protection and safety automation device.

Furthermore, the casing 100 is provided with a plurality of through holes 101a matched with the conductive plugs 201b, the conductive plugs 201b are detachably connected with the through holes 101a, preferably in a threaded connection mode, in some cases, only the terminals of partial relay protection and safety automation equipment need to be short-circuited, in this case, the conductive plugs 201b are detachable, and the number and the positions of the conductive plugs 201b can be selectively installed, so that the device is more flexible to use.

Further, a groove 201a-1 matched with the conductive sheet 301 is formed at one end of the conductive column 201a, a first hole 201a-11 is formed in the groove 201a-1, a second hole 301a corresponding to the first hole 201a-11 is formed at two ends of the conductive sheet 301, and the short circuit unit 300 further includes a first screw 302 in threaded fit with the first hole 201a-11 and the second hole 301 a. The groove 201a-1 is provided to facilitate installation of the conductive plate 301, and the conductive plate 301 is directly placed in the groove 201a-1 and fixed by a first screw 302 through the first hole 201a-11 and the second hole 301 a.

Furthermore, the conductive post 201a is provided with a third hole 201a-2 which is matched with the conductive plug 201b, the third hole 201a-2 is provided on the conductive post 201a to make the conductive plug 201b more firmly connected with the conductive post, so that poor contact is not easy to occur,

further, as shown in fig. 9, the conductive plug 201b is fixed with a conveniently-screwed part 202b-1, and the conveniently-screwed part 202b-1 has two functions, namely, when the conductive plug 201b is mounted on the housing 100, the conductive plug 201b is limited, so that the conductive plug 201b is prevented from being inserted into the housing 100 too much to be connected with relay protection and safety automation equipment; secondly, when the conductive plug 201b is screwed with the housing 100, it is easy to screw, so the screwing member 202b-1 is preferably a nut, which can be assembled with a wrench.

Further, the housing 100 includes a housing 101 and an end cover 102, the through hole 101a is disposed on the housing 101, a boss 201a-3 is disposed at one end of the conductive post 201a, the groove 201a-1 is disposed on the boss 201a-3, the receiving space 103 includes a first space 103a cooperating with the conductive post 201a, and a second space 103b cooperating with the conductive plate 301, the boss 201a-3 has a step with respect to the body of the conductive post 201a, the boss 201a-3 is large, and the body of the conductive post 201a is slightly smaller, so that the boss 201a-3 can function as a limit, that is, when the conductive post 201a is inserted into the first space 103a, the conductive post 201a cannot enter further under the action of the boss 201a-3, and an end face of the conductive post 201a is attached to the end cover 102, thus, the conductive post 201a is fixed by the boss 201a-3 and the end cap 102 and cannot move any more. The second space 103b further ensures that the conductive sheets 301 do not touch each other, creating a hazard.

Further, the conductive member 201 and the conductive sheet 301 are made of tin-plated red copper material, and no copper core wire material is used, so that the reliability of short circuit is ensured, and a circuit diagram and a text are engraved by laser on the side surface of the connector to prevent the assembly from being used by mistake.

When the protective circuit is used, the arrangement sequence of the protective circuit terminals is known firstly, the corresponding device models are selected, the conductive plugs 201b are connected as required, and the conductive plugs 201b are inserted into the relay protector after the conductive plugs 201b are confirmed.

Compared with the prior art, the utility model, will need 15 to 20 operation steps originally to accomplish the safety measure of relay protection current circuit short circuit and simplify to 3 ~ 5 operation steps, very big degree has reduced the activity duration of this work, owing to reduced the operation step of artificial wiring operation simultaneously, so reduced the error rate, reduced the operation risk to a certain extent. At present, current terminals need to be checked manually in relay protection automation current short circuit work, a traditional test line is used for single-phase connection, work operation risks of short circuit safety measures are high, time consumption is long, and each short circuit work takes 30 minutes (namely 0.5 hour) on average. And adopt the device after, can reduce short-circuit connection operation process to 2 ~ 5 minutes.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a current loop short circuit isolated plant which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

a housing (100) having an accommodating space (103) therein;

the conductive unit (200) comprises a plurality of conductive pieces (201) arranged in the accommodating space (103); and the number of the first and second groups,

the short circuit unit (300) comprises a plurality of conducting strips (301) which are sequentially connected with the four conducting pieces (201), the conducting strips (301) are not contacted with each other, and each conducting piece (201) is only connected with one conducting strip (301).

2. The special current loop shorting device as recited in claim 1, wherein: the conductive piece (201) comprises a conductive column (201a) arranged in the accommodating space (103), and a conductive plug (201b) which is matched with the conductive column (201a) and extends out of the shell (100).

3. The special current loop shorting device as recited in claim 2, wherein: the shell (100) is provided with a plurality of through holes (101a) matched with the conductive plugs (201b), and the conductive plugs (201b) are detachably connected with the through holes (101 a).

4. The device dedicated for current loop shorting of claim 3, wherein: one end of the conductive post (201a) is provided with a groove (201a-1) matched with the conductive sheet (301), a first hole (201a-11) is formed in the groove (201a-1), second holes (301a) corresponding to the first holes (201a-11) are formed in two ends of the conductive sheet (301), and the short circuit unit (300) further comprises first screws (302) in threaded fit with the first holes (201a-11) and the second holes (301 a).

5. The device dedicated for current loop shorting of claim 3 or 4, wherein: and a third hole (201a-2) matched with the conductive plug (201b) is arranged on the conductive column (201 a).

6. The device dedicated to current loop shorting of claim 5, wherein: a screwing piece (202b-1) is fixed on the conductive plug (201 b).

7. The device dedicated for short-circuiting a current loop according to any one of claims 3, 4 or 6, wherein: the case (100) includes a housing (101) and an end cap (102), and the penetration hole (101a) is provided in the housing (101).

8. The device dedicated to current loop shorting of claim 4, wherein: one end of the conductive post (201a) is provided with a boss (201a-3), the groove (201a-1) is arranged on the boss (201a-3), and the accommodating space (103) comprises a first space (103a) matched with the conductive post (201a) and a second space (103b) matched with the conductive plate (301).

9. The special short-circuit device for the current loop as claimed in any one of claims 1 to 4, 6 or 8, wherein: the number of the conducting pieces (201) is 8, one conducting piece (301) is connected with the four conducting pieces (201) at the 1 st, 3 rd, 5 th and 7 th positions, and the other conducting piece (301) is connected with the rest 4 conducting pieces (201).

10. The special short-circuit device for the current loop as claimed in any one of claims 1 to 4, 6 or 8, wherein: the conducting strips (301) are sequentially connected with four adjacent conducting pieces (201) according to the same span.