CN109950722A - A kind of anti-open ended system of secondary loop of mutual inductor and pre-fabricated electric cables - Google Patents

Abstract

The invention discloses an open circuit prevention system for a secondary circuit of a current transformer, comprising a male pin part and a female pin part, wherein the male pin part includes a first fixing part, an insulating spring part, a conductive slider and at least one The pair of male pins, the male pins are fixed on the first fixing member, and the first fixing member is connected with the conductive slider through the insulating spring member, and the conductive slider is on the The insulating spring element is connected to the male pin when in the reset state; the female pin portion includes a second fixing piece, an insulating thimble and a female pin matched with the male pin, and the female pin is fixed on the On the second fixing member, the insulating thimble is provided on the second fixing member, and the insulating thimble is used to disconnect the conductive slider from the conductive slider when the male pin is connected with the female pin. connection between the male pins. The secondary circuit open circuit prevention system of the current transformer disclosed by the invention can conveniently use the prefabricated cable form without on-site wiring, and the secondary circuit open circuit mode is simple in structure, safe and stable.

Description

A current transformer secondary circuit anti-opening type system and prefabricated cable

technical field

The invention relates to the field of substation equipment, in particular to a current transformer secondary circuit anti-opening type system and a prefabricated cable.

Background technique

The amount of smart substation control cables and power cables is increasing from the use of conventional prefabricated cables to the gradual use of factory prefabricated production, which greatly reduces the difficulty of on-site construction and shortens the construction period; however, due to the anti-opening characteristics of the secondary circuit of the current transformer , In order to prevent the use of conventional prefabricated cable plugs and sockets from loosening or artificially inserted and unplugged, resulting in accidental open circuit, the secondary circuit of current transformers is generally not suitable for prefabricated cables, and the cables used are still in the traditional way of field wiring. However, the on-site wiring method has disadvantages such as time-consuming, large on-site workload, difficulty in cable grounding construction, and low reliability.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects of the prior art, the present invention provides a secondary circuit anti-opening type system of a current transformer, which includes a male pin part and a female pin part, and the male pin part includes a first fixing member, an insulating A spring member, a conductive slider and at least a pair of male pins, the male pins are fixed on the first fixing member, and the first fixing member is connected to the conductive slider through the insulating spring member , the conductive slider is connected with the male pin when the insulating spring member is in the reset state; the female pin portion includes a second fixing member, an insulating thimble and a female pin matched with the male pin , the female pin is fixed on the second fixing piece, and the insulating thimble is arranged on the second fixing piece, and the insulating thimble is used for connecting the male pin and the female pin when When disconnecting the connection between the conductive slider and the male pin.

Preferably, the male pins and the female pins are crimp pins.

Preferably, the conductive slider is provided with a through hole, and the male pin passes through the conductive slider through the through hole and is fixed on the first fixing member.

Preferably, a conductive ring piece is connected to the pin post of the male pin, and the conductive ring piece is used for the connection between the conductive slider and the male pin when the insulating spring member is in the reset state and for limiting The conductive slider moves toward the pin end of the male pin. The structure of the conductive ring piece makes the connection and disconnection between the male pins simpler and more stable, and at the same time, the displacement of the conductive slider can be well restricted.

Preferably, an insulating sleeve is covered on the male pin post. The insulating sleeve is provided for isolating the contact between the male pin and the conductive slider when the non-insulated spring member is in the reset state.

Preferably, the diameter of the male pin post gradually increases from the socket end to the pin end, and the maximum diameter is larger than the diameter of the through hole.

The invention also discloses a prefabricated cable of the current transformer secondary open circuit prevention type, which includes an aviation plug, and the aviation plug includes any one of the above-mentioned male pin parts or female pin parts.

The invention also discloses a prefabricated cable of the current transformer secondary open circuit prevention type, which includes an aviation socket, and the aviation socket includes any one of the above-mentioned male pin parts or female pin parts.

The present invention has the following beneficial effects:

The secondary circuit open circuit prevention system of the current transformer disclosed in the present invention can conveniently use the form of prefabricated cables instead of on-site wiring.

Description of drawings

Fig. 1 is the structural representation of a preferred embodiment of the present invention;

Fig. 2 is another state structure schematic diagram of the embodiment of Fig. 1;

3 is a schematic structural diagram of another state of the embodiment of FIG. 1;

1 is the first fixing piece, 2 is the insulating spring piece, 3 is the conductive slider, 4 is the male pin, 5 is the conductive ring piece, 6 is the insulating sleeve, 7 is the second fixing piece, 8 is the insulating thimble, 9 is the female pin.

Detailed ways

The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present invention.

As shown in Figure 1 (for the convenience of discussion, the open mold parts such as the casing are omitted in the figure), a secondary circuit anti-opening system of a current transformer includes 4 male pins and a female pin part, and the male pins 4 The part includes a first fixing member 1, an insulating spring member 2, a conductive slider 3 and at least a pair of male pins 4, the male pins 4 are paired in pairs, and one of the pair of male pins 4 is used to connect the live wire, The other is connected to the neutral wire and the ground wire, and the number of male pins 4 can be set accordingly according to the actual application. The male pin 4 can be divided into three parts, the jack end for connecting with the current transformer, the pin end in the middle and the pin end for connecting with the female pin 9, the male pin 4 is fixed on the first On the fixing member 1, a conductive slider 3 is connected to the first fixing member 1 through the insulating spring member 2, so the conductive slider 3 can move back and forth under the action of elastic force and external force.

When the conductive slider 3 is in the reset state of the spring member (the reset state is not necessarily the non-deformed state of the spring member), the conductive slider 3 is kept in contact with the male pins 4, so all the male pins 4 are connected to form a loop, and this part forms a short-circuit state , at this time, the positions of the insulating spring member 2 and the conductive slider 3 are set as their reset states. The conductive slider 3 is provided with a through hole, the male pin 4 passes through the conductive slider 3 through the through hole, and then the male pin 4 is fixed on the first fixing member 1 as a connection between the conductive slider 3 and the male pin 4 In one embodiment, as shown in FIG. 1 , a conductive ring piece 5 is connected to the pin post. The conductive ring piece 5 is not only used to restrict the movement of the conductive slider 3 to the pin end of the male pin 4, but also to limit the movement of the conductive slider 3 to the pin end of the male pin 4. In the reset state, it is set to be in close contact with the conductive ring piece 5 , so as to realize the connection between the conductive slider 3 and the male pin 4 . At the same time, other parts of the male pin 4 are not in contact with or connected to the conductive slider 3. For this reason, an insulating sleeve 6 can be sleeved on the pin post of the male pin 4, and the insulating sleeve 6 is used to isolate the male pin 4 from being in the The insulating spring element 2 is in contact with the conductive slider 3 in the reset state. As another embodiment, the diameter of the male pin 4 pin post gradually increases from the jack end to the pin end, the maximum diameter is larger than the diameter of the through hole, and the conductive slider 3 can slide back and forth between the pin posts under the action of external force , when the conductive slider 3 is in the reset state, it is stuck at the position where the diameter of the pin column is equal to the hole diameter, the conductive slider 3 is in direct contact with the male pin 4, and the increase in the diameter of the pin column can prevent the conductive slider 3 from inserting The limit effect of needle end movement. Due to the elastic expansion and contraction of the spring member, the conductive slider 3 can slide back and forth to contact or move away from the male pin 4 under the action of external force, so as to realize the connection or disconnection with the male pin 4 .

The female pin portion includes a second fixing member 7, an insulating thimble 8 and a female pin 9 matched with the male pin portion, wherein the number and type of the female pins 9 are matched with the male pins 4, and the female pins 9 and the corresponding male pins 4 are connected one by one; the female pins 9 are fixed on the second fixing member 7, and the second fixing member 7 is provided with an insulating thimble 8, and the insulating thimble 8 is used when the male pin 4 and the female pin are connected. 9 When connecting, push the conductive slider 3 away from the male pin 4 to disconnect the connection between the conductive slider 3 and the male pin 4 (as shown in Figure 3). Similarly, the male pin 4 is disconnected from the female pin 9. When the contact is opened, the insulating thimble 8 does not contact the conductive slider 3 (no extra force is applied to the conductive slider 3), so that the conductive slider 3 returns to the reset state and is connected to the male pin 4. Preferably, in order to ensure that the male pin 4 is used during use 4 and the female pin 9 are in good contact, to avoid the negligence of using the male pin 4 and the female pin 9 before they are completely connected, that is, after the male pin 4 and the female pin 9 are completely connected, the insulating thimble 8 completely pushes the conductive slider. 3. Therefore, it is necessary to control the length of the insulating thimble 8 so as to achieve the above effect (as shown in FIG. 2 ). The male pin 4 and the female pin 9 are preferably crimped pins, and the socket end of the female pin 9 is a wire spring type jack, that is, the male pin 4 pin is inserted into the socket of the female pin 9 to realize the connection. . Compared with other types of pins, this type of pins has a simpler structure and more convenient connection.

Taking Fig. 1, Fig. 2 and Fig. 3 as embodiments, the working principle of the system is exemplified as follows:

(1) During normal use (as shown in Figure 3): the male pin 4 is kept in contact with the female pin 9, the insulating thimble 8 pushes the conductive slider 3 away, the female pins 9 are disconnected and short-circuited with each other, and the male pins 4 to form a loop;

(2) When partially unplugged (as shown in Figure 2): before the conductive slider 3 completely contacts the male pin 4 to form a short circuit in the socket, the male pin 4 and the female pin 9 are kept in close contact, and the conductive slider 3 is completely After contacting the male pin 4 to form a short circuit in the socket, the male pin 4 and the female pin 9 are separated again;

(3) After being completely unplugged (as shown in Figure 1), the conductive slider 3 is pushed forward, contacted and pressed against the male pin 4 under the action of the insulating spring element 2, and the male pin is completely short-circuited and grounded.

The invention also discloses a prefabricated cable, comprising the above-mentioned male pin part or female pin part of the aviation plug, that is, the male pin part or the female pin part is placed in the aviation plug housing.

The invention also discloses a prefabricated cable, which includes the above-mentioned male pin part or female pin part of the aviation socket, that is, the male pin part or the female pin part is placed in the aviation socket housing.

The above-mentioned prefabricated cable, the aviation plug including the male pin part and the aviation socket including the female pin part are used in combination to realize the function of the anti-open circuit type system of the secondary circuit of the current transformer of the present invention, and the above-mentioned aviation plug including the female pin part is used. Combining with the aviation socket including the male pin part realizes the function of the anti-open circuit type system of the secondary circuit of the current transformer of the present invention.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims (8)

1. a kind of anti-open ended system of secondary loop of mutual inductor, which is characterized in that including male plug needle portion and female plug needle portion, institute Stating male plug needle portion includes the first fixing piece (1), insulated spring part (2), conductive slider (3) and at least a pair of male plug needle (4), institute It states male plug needle (4) to be fixed on first fixing piece (1), passes through the insulated spring part (2) on first fixing piece (1) Connect with the conductive slider (3), the conductive slider (3) in insulated spring part (2) reset state with the male plug Needle (4) connection；Female plug needle portion includes the second fixing piece (7), insulation thimble (8) and matches with the male plug needle (4) Female plug needle (9), the female plug needle (9) are fixed on second fixing piece (7), and second fixing piece (7) is equipped with described It insulate thimble (8), the insulation thimble (8) is used to disconnect institute when the male plug needle (4) is attached with the female plug needle (9) State the connection between conductive slider (3) and the male plug needle (4).

2. the anti-open ended system of secondary loop of mutual inductor as described in claim 1, which is characterized in that the male plug needle (4) and the female plug needle (9) is compression joint type contact pin.

3. the anti-open ended system of secondary loop of mutual inductor as described in claim 1, which is characterized in that the conductive slider (3) it is equipped with through-hole, the male plug needle (4) is fixed on described first across the conductive slider (3) by the through-hole and fixes On part (1).

4. the anti-open ended system of secondary loop of mutual inductor as claimed in claim 3, which is characterized in that the male plug needle (4) it is connected on needle column conductive ring plate (5), when the conduction ring plate (5) is in reset state for the insulated spring part (2) The conductive slider (3) is with the connection of the male plug needle (4) and for limiting the conductive slider (3) Xiang Suoshu male plug needle (4) contact pin extreme direction is mobile.

5. the anti-open ended system of secondary loop of mutual inductor as claimed in claim 3, which is characterized in that the male plug needle (4) it is cased on needle column insulation sleeve (6).

6. the anti-open ended system of secondary loop of mutual inductor as claimed in claim 3, which is characterized in that the male plug needle (4) from jack end to contact pin end, diameter is gradually increased needle column, and the through-hole aperture is greater than at maximum gauge.

The open ended pre-fabricated electric cables 7. a kind of Current Transformer Secondary goes back on defense, including aviation plug, which is characterized in that the aviation is inserted Head includes male plug needle described in any one of claims 1-6 portion or the female plug needle portion.

The open ended pre-fabricated electric cables 8. a kind of Current Transformer Secondary goes back on defense, including aviation socket, which is characterized in that the aviation is inserted Seat includes male plug needle described in any one of claims 1-6 portion or the female plug needle portion.