CN219328813U

CN219328813U - Isolation device for low-voltage wires

Info

Publication number: CN219328813U
Application number: CN202222760214.1U
Authority: CN
Inventors: 张�杰; 段雯杰; 黄伟
Original assignee: State Grid Corp of China SGCC; State Grid Hunan Electric Power Co Ltd; Changde Power Supply Co of State Grid Hunan Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Hunan Electric Power Co Ltd; Changde Power Supply Co of State Grid Hunan Electric Power Co Ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-07-11
Anticipated expiration: 2032-10-19

Abstract

The utility model discloses a low-voltage wire isolation device which comprises an isolation component and an electricity measurement component which are detachably connected, wherein the isolation component comprises an insulating sleeve and a locking piece inserted into the insulating sleeve, the locking piece is movably arranged along the radial direction of the insulating sleeve, a through hole for a power supply wire to pass through is formed in the locking piece, and a first spring is arranged at the bottom end of the locking piece, so that when the first spring is compressed, the through hole and an inner hole of the insulating sleeve are coaxially arranged. The utility model can effectively isolate the live wire ends and improve the operation safety.

Description

Isolation device for low-voltage wires

Technical Field

The utility model relates to the field of electricity, in particular to a low-voltage wire isolation device.

Background

When the transformer area of the village and town power supply station processes customer faults, in order not to influence the power consumption of customers in the whole transformer area, a live working mode is generally adopted, the wire heads of live bare wires are commonly held and pricked by using an adhesive insulating tape, or the wire heads of the live bare wires are bent, in the operation process, the phenomenon that the adhesive insulating tape and the bare wires are not firm to cause dropping or the bare wires are mistakenly bumped to cause short circuit of the bare wires, and accidents of burned hands and damaged equipment of operators are easily caused.

Disclosure of Invention

The technical problem to be solved by the utility model is as follows: aiming at the technical problems in the prior art, the utility model provides the low-voltage wire isolating device which can effectively isolate the wire heads of the live wires and improve the operation safety.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model provides a low voltage wire isolating device, includes the isolation component and the survey electric assembly of detachable connection, the isolation component includes insulating sleeve and inserts the retaining member of locating in the insulating sleeve, the radial activity setting of retaining member along insulating sleeve, the retaining member is equipped with the through-hole that the power supply line passed, just the bottom of retaining member is equipped with first spring for when first spring is compressed tightly, the through-hole sets up with insulating sleeve's hole is coaxial.

Optionally, the locking piece is made of insulating materials, and a pressing plate is arranged at the top end of the locking piece.

Optionally, survey electric subassembly includes casing and test rod, the casing is tubular structure, the one end and the insulating sleeve's of casing end threaded connection, the other end of casing is equipped with the metal covering, be equipped with contact, circuit board and the battery that connect gradually in the hole of casing, the battery still passes through second spring coupling metal covering, the test rod inserts and locates the insulating sleeve's hole, and pass behind the through-hole of retaining member with the contact.

Optionally, be equipped with LED pilot lamp, current-limiting resistor R and emitter and follow amplifier circuit on the circuit board, the positive pole of LED pilot lamp passes through current-limiting resistor R and battery connection, the negative pole of LED pilot lamp passes through emitter and follows amplifier circuit and contact connection.

Optionally, the emitter follower amplifying circuit includes transistors VT1, VT2 and VT3, a base of the transistor VT1 is connected with the contact, a base of the transistor VT2 is connected with an emitter of the transistor VT1, a base of the transistor VT3 is connected with the emitter of the transistor VT2, collectors of the transistors VT1 and VT2 are respectively connected with the battery, a collector of the transistor VT3 is connected with a cathode of the LED indicator, and the emitter of the transistor VT3 is grounded.

Optionally, an insulating cover is arranged at the end part of the insulating sleeve, and the end part of the insulating sleeve is connected with the opening end of the insulating cover in a plug-in mode.

Optionally, the outer side wall of the insulating sleeve is further provided with a connecting piece, and the outer side wall of the insulating sleeve is connected with the outer side wall of the insulating cover through the connecting piece.

Optionally, the closed end of the insulating cover is provided with a marking surface for marking.

Optionally, the test rod is further sleeved with an insulating sleeve, and the insulating sleeve is arranged in a gap between the test rod and the inner hole of the insulating sleeve.

Optionally, the shell is made of transparent material or semitransparent material.

Compared with the prior art, the utility model has the advantages that:

1. the utility model comprises an isolation assembly and an electricity testing assembly which are detachably connected, wherein the isolation assembly consists of an insulating sleeve and a locking piece, thereby integrating the live detection of an electric wire and the isolation function of a bare electric wire, and the isolation assembly can be tightly sleeved outside the bare electric wire;

2. in the electricity measuring assembly, the LED indicator lamp is arranged on the circuit board, so that the electrified state of the electric wire can be clearly seen under the condition of daytime use, and the electric shock of operators is avoided.

3. The detachable insulating cover is further arranged on the insulating assembly, and after the insulating assembly is separated from the electricity measuring assembly, the insulating cover can be arranged at the opening end of the insulating sleeve, so that the insulating effect on the exposed electric wires is further improved.

Drawings

Fig. 1 is a schematic diagram of an external structure of an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of an embodiment of the present utility model.

Figure 3 is a cross-sectional view of an isolation assembly according to an embodiment of the present utility model.

FIG. 4 is a schematic diagram illustrating the use of the isolation assembly according to an embodiment of the utility model.

Fig. 5 is a schematic circuit diagram of components on a circuit board according to an embodiment of the present utility model.

Legend description: 1-isolation assembly, 2-electricity testing assembly, 11-insulating sleeve, 12-locking piece, 111-insulating cover, 112-connecting piece, 121-first spring, 122-pressing plate, 101-through hole, 21-shell, 22-testing rod, 23-metal cover, 211-contact, 212-circuit board, 213-battery, 214-second spring and 221-insulating sleeve.

Detailed Description

The utility model is further described below in connection with the drawings and the specific preferred embodiments, but the scope of protection of the utility model is not limited thereby.

As shown in fig. 1, the utility model provides a low-voltage wire isolation device, which comprises an isolation component 1 and an electricity measurement component 2 which are detachably connected, wherein the isolation component 1 of the embodiment comprises an insulating sleeve 11 and a locking piece 12 inserted into the insulating sleeve 11, the locking piece 12 is movably arranged along the radial direction of the insulating sleeve 11, the locking piece 12 is provided with a through hole 101 through which a power supply wire passes, and the bottom end of the locking piece 12 is provided with a first spring 121, so that when the first spring 121 is pressed, the through hole 101 and an inner hole of the insulating sleeve 11 are coaxially arranged.

With this structure, as shown in fig. 4, when the isolation assembly 1 is used, it is separated from the electricity measuring assembly 2, then the locker 12 is pressed, and the bare wire is inserted into the inner hole of the insulation sleeve 11 to pass through the through hole 101, and then the locker 12 is released, so that the first spring 121 is restored, and the locker 12 is lifted up, so that the lower portion of the through hole 101 and the upper wall of the inner hole of the insulation sleeve 11 apply pressure to the wire, locking the inserted wire and isolating it from the outside.

In this embodiment, in order to avoid an electric shock to an operator, in this embodiment, the locking member 12 is made of an insulating material, and meanwhile, a pressing plate 122 is disposed at the top end of the locking member 12, so as to improve comfort of the operator.

As shown in fig. 2 to 4, in the present embodiment, the end of the insulating sleeve 11 is provided with the insulating cover 111, and the end of the insulating sleeve 11 is connected with the opening end of the insulating cover 111 in a plug-in manner, so that when the isolation assembly 1 is used, after the electric wire is inserted into the inner hole of the insulating sleeve 11, the end of the insulating sleeve 11 far from the electric wire is inserted into the insulating cover 111, and external dust or moisture can be prevented from entering the inner hole of the insulating sleeve 11.

As shown in fig. 2 to 4, in order to avoid the loss of the insulating cover 111, in this embodiment, the outer side wall of the insulating sleeve 11 is further provided with a connecting member 112, and the outer side wall of the insulating sleeve 11 is connected to the outer side wall of the insulating cover 111 through the connecting member 112. The connecting member 112 is made of flexible material, and may also be made of braid, such as anti-loss rope, etc.

In this embodiment, in order to facilitate recording of the type of the insulated wire, the closed end of the insulating cover 111 is provided with a marking surface for marking, and the marking surface is provided with a resin coating, so that repeated erasing can be facilitated.

As another example, the insulating cover 111 may be made of plastics with different colors according to standard colors of three-phase alternating current, so as to distinguish types of insulated wires: yellow (representing A phase), green (representing B phase), red (representing C phase), light blue (representing neutral line and zero line), a plurality of isolation assemblies 1 are arranged for this purpose, operators can select the isolation assemblies 1 of the insulating covers 111 with different colors to isolate and mark the electric wires according to working requirements, the operators can be reminded of correctly wiring, and the problems of three-phase motor inversion, air conditioner non-refrigeration, electric equipment damage and the like caused by wiring phase sequence errors are prevented.

As shown in fig. 2, in this embodiment, the electrical measurement assembly 2 includes a housing 21 and a test rod 22, where the housing 21 is of a tubular structure and is made of a transparent material or a semitransparent material, one end of the housing 21 is in threaded connection with an end portion of the insulating sleeve 11, the other end of the housing is provided with a metal cover 23, a contact 211, a circuit board 212 and a battery 213 which are sequentially connected are disposed in an inner hole of the housing 21, the battery 213 is further connected with the metal cover 23 through a second spring 214, and the test rod 22 is inserted into the inner hole of the insulating sleeve 11 and contacts the contact 211 after passing through the through hole 101 of the locking member 12. Through the above structure, the low-voltage wire isolation device of the embodiment has the function of the test pencil, and before isolating the wires, an operator holds the low-voltage wire isolation device by hand, touches the test rod 22 to the wires and touches the metal cover 23, thereby forming a loop between the wires and the ground.

In this embodiment, the battery 213 is a button battery, for convenient replacement of the button battery, as shown in fig. 2, an internal thread is disposed at one end of the housing 21 away from the isolation assembly 1, an external thread is disposed on a side wall of the metal cover 23, the external thread of the metal cover 23 is matched with the internal thread of the housing 21, and a "one-word" slot or a "cross" slot is further disposed on a cover surface of the metal cover 23, so that an operator can replace the button battery in the housing 21 after unscrewing the metal cover 23 by using a one-word screwdriver or a cross screwdriver.

In this embodiment, an LED indicator, a current limiting resistor R and an emitter follower amplifier circuit are disposed on the circuit board 212, the positive electrode of the LED indicator is connected to the battery 213 through the current limiting resistor R, and the negative electrode of the LED indicator is connected to the contact 211 through the emitter follower amplifier circuit. As shown in fig. 5, the emitter follower amplifier circuit includes transistors VT1, VT2, and VT3, the base of the transistor VT1 is connected to the contact 211, the base of the transistor VT2 is connected to the emitter of the transistor VT1, the base of the transistor VT3 is connected to the emitter of the transistor VT2, the collectors of the transistors VT1 and VT2 are respectively connected to the battery 213, the collector of the transistor VT3 is connected to the cathode of the LED indicator, and the emitter of the transistor VT3 is grounded. When the test rod 22 is close to the live wire, the contact 211 acquires an extremely weak 50Hz alternating current signal through the test rod 22, and the electric wire is electrified by driving the LED indicator lamp to emit bright light after being amplified by VT1-VT 3; when the test bar 22 is close to the zero line, no induction alternating current signal is generated, VT1-VT3 are all cut off, the LED indicator lamp can not emit light, and the wire is not electrified.

In this embodiment, in order to ensure the safety of the operator, as shown in fig. 2, the test lever 22 is further sleeved with an insulating sleeve 221, and the insulating sleeve 221 is disposed in a gap between the test lever 22 and the inner hole of the insulating sleeve 11, so as to ensure that the charged portion of the test lever 22 is only contacted with the contact 211.

In this embodiment, the test bars 22 may be a group, and the ends of the test bars 22 in the group may be in various forms such as a straight cross screwdriver, a straight round contact, a curved straight screwdriver, a curved cross screwdriver, and a curved round contact, so that an operator can select the reasonable test bars 22 according to different use conditions.

In conclusion, the low-voltage cable isolation device has the functions of cable isolation, sign reminding, live testing, screwdriver operation and the like, and can also improve the working efficiency and power supply reliability of operators and avoid accidents of personal electric shock and equipment damage; has the advantages of convenient carrying, simple operation, safety, reliability and the like.

The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. The utility model provides a low voltage wire isolating device, its characterized in that, including detachable isolation subassembly (1) and survey electric subassembly (2) of connection, isolation subassembly (1) include insulating boot (11) and insert retaining member (12) of locating in insulating boot (11), radial activity setting along insulating boot (11) of retaining member (12), retaining member (12) are equipped with through-hole (101) that the power supply line passed, just the bottom of retaining member (12) is equipped with first spring (121), makes when first spring (121) are compressed tightly, the hole coaxial setting of through-hole (101) and insulating boot (11).

2. The device according to claim 1, wherein the locking member (12) is made of an insulating material, and a pressing plate (122) is provided at a top end of the locking member (12).

3. The low-voltage wire isolation device according to claim 1, wherein the electrical testing assembly (2) comprises a shell (21) and a testing rod (22), the shell (21) is of a tubular structure, one end of the shell (21) is in threaded connection with the end of the insulating sleeve (11), a metal cover (23) is arranged at the other end of the shell, a contact (211), a circuit board (212) and a battery (213) which are sequentially connected are arranged in an inner hole of the shell (21), the battery (213) is further connected with the metal cover (23) through a second spring (214), and the testing rod (22) is inserted into the inner hole of the insulating sleeve (11) and is contacted with the contact (211) after passing through a through hole (101) of the locking piece (12).

4. A low voltage wire isolation device according to claim 3, wherein the circuit board (212) is provided with an LED indicator lamp, a current limiting resistor R and an emitter follower amplifier circuit, the positive electrode of the LED indicator lamp is connected with the battery (213) through the current limiting resistor R, and the negative electrode of the LED indicator lamp is connected with the contact (211) through the emitter follower amplifier circuit.

5. The low voltage wire isolation device of claim 4 wherein the emitter follower amplifier circuit comprises transistors VT1, VT2 and VT3, the base of the transistor VT1 is connected to the contact (211), the base of the transistor VT2 is connected to the emitter of the transistor VT1, the base of the transistor VT3 is connected to the emitter of the transistor VT2, the collectors of the transistors VT1, VT2 are connected to the battery (213), respectively, the collector of the transistor VT3 is connected to the cathode of the LED indicator, and the emitter of the transistor VT3 is grounded.

6. The electrical line isolation device according to claim 1, wherein an end of the insulating sleeve (11) is provided with an insulating cover (111), and the end of the insulating sleeve (11) is connected to an open end of the insulating cover (111) in a plug-in manner.

7. The electrical line isolation device according to claim 6, wherein the outer side wall of the insulating sleeve (11) is further provided with a connecting member (112), and the outer side wall of the insulating sleeve (11) is connected with the outer side wall of the insulating cover (111) through the connecting member (112).

8. The low voltage wire insulation device according to claim 6, characterized in that the closed end of the insulating cover (111) is provided with a marking surface for marking.

9. A low voltage wire isolation device according to claim 3, characterized in that the test rod (22) is further sleeved with an insulating sleeve (221), the insulating sleeve (221) being arranged in the gap between the test rod (22) and the inner bore of the insulating sleeve (11).

10. A low voltage wire isolation device according to claim 3, characterized in that the housing (21) is made of a transparent or translucent material.