CN212210390U - Junction box with circuit on-off and load control circuit control functions - Google Patents

Abstract

The utility model relates to the technical field of circuit maintenance, in particular to a junction box with functions of circuit disconnection and negative control loop control, comprising an insulated junction box body. It is divided into five wiring cavities, and each of the wiring cavities is used to realize the wiring of the wires at the corresponding positions. One of the wiring cavities adjacent to the wire wiring cavities is the neutral wiring cavities, and the remaining three wiring cavities are the live wiring cavities. The junction box is provided with the negative control trip wiring assembly for the power supply gate line connection, so that it can effectively realize that the trip line directly forms a negative control trip control loop without going through the controller in the process of maintenance and replacement, ensuring that the control circuit can be realized in the power-on state. Safer line replacement maintenance, improving the safety of maintenance operations.

Description

Junction box with loop open and negative loop control

technical field

The utility model relates to the technical field of circuit maintenance, in particular to a junction box structure capable of realizing safe and rapid maintenance and replacement of a trip wire and a negative control switch in a continuously electrified state, in particular to a junction box structure with functions of circuit disconnection and negative control circuit control box.

Background technique

At present, when connecting the circuit in the enterprise control cabinet, the trip wire is usually directly connected to the controller and then connected to the negative control switch of the enterprise power end. At the same time, a junction box is set at the lower end of the controller. It enters the controller after passing through the junction box. The main function of the negative control switch is to control the on-off of the circuit at the power end of the enterprise. This structure makes the trip wire always need to be energized when the power end is energized.

Now when the fault maintenance of the control terminal line of the enterprise is carried out, the large-scale equipment of the enterprise needs to be shut down due to the power outage maintenance, and the economic loss to the enterprise is relatively serious. Therefore, the above-mentioned trip wire is always in an electrified state, so the existing connection method has a great potential safety hazard when it is maintained without electricity.

For this reason, our company's R&D personnel have specially designed a device that can effectively realize the fast, safe and safe maintenance and replacement of the power line without stopping the power supply, so as to improve the maintenance efficiency and construction safety.

Utility model content

The technical solution adopted by the present invention to solve one of the above-mentioned technical problems is: a junction box with loop disconnection and negative control loop control functions, the junction box is arranged between the controller and the negative control switch and is used for the trip wire Passing through, the two ends of the trip wire are respectively connected to the controller and the negative control switch, including an insulated junction box body, and the interior of the insulated junction box body is divided into five junction cavities by a number of insulating main partitions. The wiring cavities are respectively used to realize the wiring of the wires at the corresponding positions, the wiring cavities located at one end of the insulated junction box body are the trip wire wiring cavities, and one of the wiring cavities adjacent to the trip wire wiring cavities. The wiring cavities are neutral wiring cavities, and the remaining three wiring cavities are live wiring cavities. The wiring assembly realizes the connection of the neutral wire; a live wire connection assembly is installed in each of the live wire connection chambers, a neutral wire connection assembly is installed in the neutral wire connection chamber, and a neutral wire connection assembly is installed in the trip wire connection chamber. Trip wire wiring assembly.

Preferably, the live wire connection assembly includes a secondary partition, the secondary partition is used to separate the corresponding live wire connection cavity into a voltage cavity and a current cavity, a voltage wire connection terminal is installed in the voltage cavity, and the A number of current line terminals are arranged in the current chamber along the direction parallel to the voltage line terminals, and an insulating pressure plate is arranged above the current chamber and the voltage chamber, and each thread of each of the insulating pressure plates is provided. The holes are respectively screwed with crimping screws, and the inner ends of the crimping screws are respectively screwed into the wiring holes of the voltage line terminal or the current line terminal at the corresponding position. The holes are respectively connected to the outside through the threading holes arranged at the corresponding positions of the insulating junction box body, and a voltage connecting piece is installed on the pressing screw in the middle of the insulating pressing plate above the voltage wire terminal. A current connecting piece assembly is installed on the pressing screw in the center of the insulating pressing plate above the current wire terminal.

Preferably, the voltage connection element and the current connection element have the same structure and are both connection elements.

Preferably, the connecting piece assembly includes a connecting piece, and an adjusting long slot is provided in the middle section of the connecting piece, and the adjusting long slot is clamped on the outer side wall of the current crimping screw at the corresponding position, and the adjusting long groove is arranged in the middle section of the connecting piece. The end of the connecting piece is provided with an arc-shaped clamping groove for clamping on the outer wall of the crimping screw at an adjacent position, and an insulating A push block, a limit track with a limited space is provided between the two adjacent pressure line screws connected to the connecting piece, and the limit track is used to limit the connecting piece along the adjacent pressure line. The center line of the screw moves in the direction of the pull-out.

Preferably, an insulating cover plate is connected to the top side of the insulating junction box body through a hinge, and the insulating cover plate is used to cover the top of the insulating junction box body, and in the insulating cover plate Both ends of the diagonal line are respectively provided with upper lugs, and lower lugs are fixedly connected to the insulating junction box body directly below each of the upper lugs. The connection is locked by a lock.

Preferably, the structure of the neutral wire connection assembly is the same as that of the component structure in the voltage chamber of the live wire connection assembly, including a neutral wire connection terminal installed and arranged in the neutral wire connection chamber, above the neutral wire connection chamber An insulating pressing plate is provided, and a pressing screw is screwed into each threaded hole of each insulating pressing plate, and the inner end of each pressing screw is respectively screwed and extended to the connection of the zero line terminal at the corresponding position. In the hole, each of the wiring holes communicates with the outside through the wiring holes provided at the corresponding positions of the insulated junction box body.

Preferably, a neutral wire connecting piece assembly is installed on the pressure wire screw in the center of the insulating pressure plate above the neutral wire terminal at the end, and the structure of the neutral wire connecting piece assembly is the same as that of the connecting piece assembly. .

Preferably, the trip wire connection cavity includes an auxiliary partition plate arranged in the trip wire connection cavity, and the auxiliary partition divides the trip wire connection cavity into two trip wire sub-cavities. The trip wire wiring assemblies are respectively installed in the trip wire sub-chambers, and the structure of the trip wire wiring assemblies is the same as that of the neutral wire wiring assembly, including a trip wire wiring terminal installed in the trip wire sub-chamber. , an insulating pressure plate is arranged above the trip wire sub-chamber, and a pressure line screw is screwed into each threaded hole of each of the insulating pressure plates, and the inner ends of each of the pressure line screws are respectively screwed and extended to the corresponding position. In the wiring holes of the said trip wire connection terminal, each of the said wiring holes is communicated with the outside through each threading hole provided at the corresponding position of the insulated junction box body.

Preferably, a trip wire connecting piece assembly is installed on the pressure wire screw in the center of the insulating pressure plate above the trip wire connection terminal at the end, and the structure of the trip wire connecting piece assembly is the same as that of the connecting piece assembly.

The circuit of the trip wire in the maintenance state does not pass through the controller.

The beneficial effect of the utility model is reflected in: the trip wire wiring assembly for the power supply gate wire connection set in the junction box can effectively realize the direct realization of the trip wire without passing through the controller in the process of maintenance and replacement by operating the trip wire wiring assembly. Negative control loop control ensures safer wire replacement maintenance in the power-on state, and improves the safety of maintenance operations; through the operation of each connecting piece on the live wire connection assembly and the neutral wire connection assembly, the control of each circuit disconnection is realized.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings required for the description of the specific embodiments or the prior art. Similar elements or components are generally identified by similar reference numerals throughout the drawings. In the drawings, each element or component is not necessarily drawn to actual scale.

FIG. 1 is a schematic diagram showing the use connection state of the internal structure of the present invention.

FIG. 2 is a schematic cross-sectional structural diagram taken along the line A-A of FIG. 1 .

FIG. 3 is a schematic structural diagram of the connecting piece assembly of the present invention.

FIG. 4 is a schematic top view of the structure of the present invention.

In the figure, 1. Insulated junction box; 2. Controller; 3. Negative control switch; 4. Trip wire; 5. Insulated main partition; 6. Wiring assembly; 6.1: Live wire wiring assembly; ; 6.2.1, Neutral wire terminal; 6.2.2, Neutral wire connection piece; 6.3, Trip wire connection assembly; 6.3.1, Trip wire connection terminal; 6.3.2, Trip wire connection piece; 61, Secondary barrier Board; 62, Voltage wire terminal; 63, Current wire terminal; 64, Insulation pressure plate; 65, Crimping screw; 66, Wiring hole; 67, Threading hole; 68, Voltage connection piece; 69, Current connection piece ;7. Trip wire connection cavity; 7.1. Trip wire sub-chamber; 8. Fire wire connection cavity; 9. Connecting piece; 10. Adjusting long slot; Track; 14, insulating cover; 15, upper lug plate; 16, lower lug plate; 17, lock; 18, neutral wiring cavity.

Detailed ways

The embodiments of the technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

As shown in Figures 1-4, a junction box with loop opening and negative control loop control functions, the junction box is provided between the controller 2 and the negative control switch 3 and used for the trip wire 4 to pass through, the trip wire The two ends of 4 are respectively connected to the controller 2 and the negative control switch 3, including an insulated junction box body 1, and the interior of the insulated junction box body 1 is divided into five wiring cavities by a number of insulating main partitions 5. Each of the wiring cavities is used to realize the wiring of the wires at the corresponding positions, and the wiring cavities located at one end of the insulated junction box body are the trip wire wiring cavities 7, which are adjacent to the trip wire wiring cavities 7. One of the wiring cavities is the zero wire wiring cavities 18, and the remaining three wiring cavities are the live wire wiring cavities 8. The trip wire wiring cavities 7 realize the wiring of the trip wires through the wiring components 6 inside. The wire connection cavity 18 realizes the connection of the neutral wire through its internal wiring assembly 6; a live wire connection assembly 6.1 is installed in each of the live wire connection chambers 8, and a neutral wire connection assembly is installed in the neutral wire connection cavity 18. 6.2. A trip wire wiring assembly 6.3 is installed in the trip wire wiring cavity 7 .

The junction box is added with a wiring assembly 6 for the trip wire 4. The junction box realizes the control of the circuit of the trip wire 4 during maintenance. During maintenance, it is not directly short-circuited through the controller 2 to form a loop, so as to ensure that the trip wire 4 and the negative control switch 3 are connected to the live state to complete the line maintenance of the junction box and the controller 2. The maintenance process does not affect the power consumption end produced by the enterprise, ensuring that the enterprise can complete the maintenance without stopping. During the whole maintenance process The junction box can isolate and short-circuit the trip wire 4 independently, thereby avoiding the potential safety hazard caused by the live connection between the trip wire 4 and the controller 2, and improving the operation safety in the maintenance process.

Preferably, the wiring assembly 6 includes a secondary partition 61, and the secondary partition 61 is used to separate the corresponding live wire connection cavity 8 into a voltage cavity and a current cavity, and a voltage wire connection terminal is installed in the voltage cavity 62. A plurality of current line terminals 63 are arranged in the current chamber along the direction parallel to the voltage line terminals 62, and an insulating pressure plate 64 is arranged above the current chamber and the voltage chamber. Each threaded hole of the insulating pressure plate 64 is screwed with a pressure line screw 65, and the inner end of each of the line pressure screws 65 is respectively screwed and extended to the voltage line terminal 62 or the current line at the corresponding position. In the wiring holes 66 of the wiring terminals 63, the wiring holes 66 are respectively connected to the outside through the wiring holes 67 provided at the corresponding positions of the insulating junction box body 1, and the insulating pressing plate 64 above the voltage line wiring terminals 62 is connected to the outside. A voltage connecting piece 68 is installed on the middle crimping screw 65, and a current connecting piece 69 is installed on the crimping screw 65 in the center of the insulating pressure plate 64 above the current line terminal 63 in the middle.

By adjusting the positions of the voltage connecting piece 68 and the current connecting piece 69, the short-circuit conversion of the current voltage loop and the current loop is realized, so as to facilitate the replacement and maintenance of the current line, ensure the power failure of the current line, and improve the safety of maintenance. .

Preferably, the voltage connection element 68 and the current connection element 69 have the same structure and are both connection elements.

Preferably, the connecting piece assembly includes a connecting piece 9, and a long adjusting slot 10 is provided in the middle section of the connecting piece 9, and the long adjusting slot 10 is clamped to the outer side of the current crimping screw 65 at the corresponding position On the wall, the end of the connecting piece 9 is provided with an arc-shaped clamping slot 11 for clamping the outer wall of the crimping screw 65 at an adjacent position. The opposite end of the slot 11 is provided with an insulating push block 12 , and a limit rail 13 with a limited space is provided between the two adjacent pressing screws 65 connected to the connecting piece 9 . The rail 13 is used to restrict the pull-out movement of the connecting piece 9 along the direction of the center line connection of the adjacent crimping screws 65 .

The connecting piece set here adopts a track-limited structure, which ensures that electric sparks caused by shaking and touching between the connecting piece assembly and the pressing screw 65 at the corresponding position are reduced when the connecting piece is displaced, and the hidden danger of operation safety is reduced.

During operation, the insulating push block 12 can be squeezed by hand to achieve an insulating effect, and at the same time, it can provide a force point for moving the connecting piece 9 , so as to ensure the convenience and labor saving of the connecting piece 9 in displacement.

Preferably, the structure of the neutral wire connection assembly 6.2 is the same as that of the components in the voltage cavity of the live wire connection assembly 6.1, including a neutral wire connection terminal 6.2.1 installed and arranged in the neutral wire connection cavity 18. An insulating pressure plate 64 is arranged above the neutral wire connection cavity 18, and a pressure line screw 65 is screwed into each threaded hole of each of the insulating pressure plates 64, and the inner ends of each of the line pressure screws 65 are respectively screwed and extended to the corresponding In the wiring hole 66 of the neutral wire terminal 6.2.1 at the position, each of the wiring holes 66 is communicated with the outside through the wiring holes 67 provided at the corresponding positions of the insulated junction box body 1 respectively.

Preferably, a neutral wire connecting piece assembly 6.2.2 is installed on the pressure wire screw 65 in the center of the insulating pressure plate 64 above the neutral wire terminal 6.2.1 at the end, and the neutral wire connecting piece assembly 6.2. The structure of 2 is the same as that of the connecting piece assembly.

Preferably, the trip wire connection cavity 7 includes a secondary partition 61 arranged in the trip wire connection cavity 7, and the auxiliary partition 61 divides the trip wire connection cavity 7 into two trip wire parts. Cavity 7.1, the trip wire wiring assemblies 6.3 are respectively installed in the two trip wire sub-chambers 7.1. The trip wire terminal 6.3.1 in the trip wire sub-chamber 7.1 is provided with an insulating pressing plate 64 above the trip wire sub-chamber 7.1, and a wire pressing screw 65 is screwed into each threaded hole of each of the insulating pressing plates 64 respectively. , the inner ends of each of the crimping screws 65 are respectively screwed into the wiring holes 66 of the trip wire terminals 65 at the corresponding positions, and the wiring holes 66 respectively pass through the corresponding Each threading hole 67 at the position communicates with the outside.

Preferably, a trip wire connecting piece assembly 6.3.2 is installed on the pressure wire screw 65 in the center of the insulating pressure plate 64 located above the trip wire terminal 6.3.1 at the end, and the trip wire connecting piece assembly 6.3.2 The structure is the same as that of the connecting piece assembly.

The circuit of the trip wire in the maintenance state does not pass through the controller.

The lock device 17 is in the prior art, and can be a locking member such as a locking screw or a locking bolt, or can be directly connected by a lock device. The specific structure is not limited, and the lock device structure does not belong to the invention point of the present application.

The insulating cover 14 structure with hinges is designed and combined with the diagonal locking position to realize the anti-theft function, which is convenient for conjoined disassembly during maintenance, there is no problem of missing small parts, and the operation is more convenient.

The three live wire junction cavities 8 in the junction box are connected in the same way as the existing junction box when connecting three-phase electricity. The specific operation is performed by professional electricians according to the technical requirements in the field. The wiring process is not described in detail, and belongs to the prior art.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: The technical solutions recorded in the various embodiments are modified, or some or all of the technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention. All should be included in the scope of the claims and description of the present utility model; for those skilled in the art, any alternative improvements or transformations made to the embodiments of the present utility model fall within the protection scope of the present utility model. .

The parts not described in detail in the present invention are the well-known technologies of those skilled in the art.

Claims (9)

1. A junction box with loop disconnection and negative control loop control functions, the junction box is arranged between the controller and the negative control switch and is used for the trip wire to pass through, and the two ends of the trip wire are respectively connected to the controller and the negative control switch. The switch is characterized in that it includes an insulated junction box body, and the interior of the insulated junction box body is divided into five wiring cavities by a number of insulating main partitions, and each of the wiring cavities is used to realize the corresponding position. The wiring of the wire, the wiring cavity located at one end of the insulated junction box body is a trip wire wiring cavity, one of the wiring cavities adjacent to the trip wire wiring cavity is a zero wire wiring cavity, and the remaining The three wiring cavities are the live wire wiring cavities, the trip wire wiring cavities realize the wiring of the trip wires through the wiring components inside, and the neutral wiring cavities realize the wiring of the neutral wires through the wiring components inside; A live wire connection assembly is installed in the live wire connection cavity, a neutral wire connection assembly is installed in the neutral wire connection cavity, and a trip wire connection assembly is installed in the trip wire connection cavity. 2. The junction box with loop disconnection and negative control loop control functions according to claim 1, characterized in that: the live wire wiring assembly comprises a secondary partition, and the secondary partition is used to connect the corresponding live wire The cavity is divided into a voltage cavity and a current cavity, a voltage line connection terminal is installed in the voltage cavity, and a plurality of current line connection terminals are arranged in the current cavity along the direction parallel to the voltage line connection terminal. An insulating pressure plate is arranged above the current cavity and the voltage cavity, a pressure line screw is screwed into each threaded hole of each of the insulation pressure plates, and the inner ends of each of the line pressure screws are respectively screwed and extended to the corresponding position. In the wiring holes of the voltage wire terminal or the current wire terminal, each of the wiring holes communicates with the outside through the wire holes provided at the corresponding positions of the insulating junction box body, and the voltage wire is connected to the outside. A voltage connection piece is installed on the pressure wire screw in the middle of the insulating pressure plate above the connection terminal, and a current connection piece is installed on the pressure wire screw in the center of the insulation pressure plate above the current line connection terminal in the middle. 3 . The junction box with loop disconnection and negative control loop control functions according to claim 2 , wherein the voltage connecting piece assembly and the current connecting piece assembly have the same structure and are both connecting piece assemblies. 4 . 4 . The junction box with the functions of loop disconnection and negative control loop control according to claim 3 , wherein the connecting piece assembly comprises a connecting piece, and an adjustment long slot is arranged in the middle section of the connecting piece, 5 . The adjusting long slot is clamped on the outer side wall of the current crimping screw at the corresponding position, and an outer side wall of the crimping screw at the adjacent position is provided at the end of the connecting piece. The arc-shaped clamping groove on the upper part is provided with an insulating push block at the end opposite to the arc-shaped clamping groove, and a limited band is provided between the two adjacent pressing screws connected with the connecting piece. The limit track of the space, the limit track is used to limit the pull-out movement of the connecting piece along the direction of the center line of the adjacent crimping screws. 5. The junction box with the functions of circuit disconnection and negative control loop control according to claim 4, characterized in that: an insulating cover plate is connected through a hinge on the top side of the insulating junction box body, and the insulating The cover plate is used to cover the top of the insulating junction box body, and upper lugs are respectively provided at both ends of one of the diagonal lines of the insulating cover plate. The insulating junction box body is fixedly connected with a lower ear plate, and the lower ear plate and the corresponding upper ear plate are locked and connected by a lock. 6. The junction box with loop disconnection and negative control loop control functions according to claim 5, characterized in that: the structure of the neutral wire wiring assembly is the same as the assembly structure in the voltage chamber of the live wire wiring assembly, comprising: A neutral wire terminal is installed and arranged in the neutral wire connection cavity, an insulating pressure plate is arranged above the neutral wire connection cavity, and a pressure line screw is screwed into each threaded hole of each of the insulating pressure plates. The inner ends of the crimping screws are respectively screwed and extended into the wiring holes of the neutral wire terminal at the corresponding position, and the wiring holes are respectively connected to the outside through the threading holes provided at the corresponding positions of the insulating junction box body. Pass. 7. The junction box with the functions of loop disconnection and negative control loop control according to claim 6, characterized in that: on the crimping screw in the center of the insulating pressure plate located above the neutral wire terminal at the end, there are installed A neutral line connecting piece assembly, the structure of the neutral line connecting piece assembly is the same as that of the connecting piece assembly. 8 . The junction box with loop disconnection and negative control loop control functions according to claim 7 , wherein the trip wire wiring cavity comprises a secondary partition plate arranged in the trip wire wiring cavity, so the The auxiliary partition divides the trip wire wiring cavity into two trip wire sub-chambers, and the trip wire wiring assemblies are respectively installed in the two trip wire sub-cavities. The neutral wire connection assembly has the same structure, including a trip wire connection terminal installed and arranged in the trip wire sub-chamber, an insulating pressure plate is arranged above the trip wire sub-chamber, and in each of the threaded holes of the insulation pressure plates, respectively. Thread-pressing screws are screwed together, the inner ends of each of the thread-pressing screws are respectively screwed and extended into the wiring holes of the trip wire connection terminals at the corresponding positions, and each of the wiring holes respectively passes through the wiring holes arranged on the insulating junction box body. Each threading hole at the corresponding position communicates with the outside. 9 . The junction box with the functions of loop disconnection and negative control loop control according to claim 8 , characterized in that: a wire crimping screw in the center of the insulating pressure plate located above the trip wire terminal at the end is installed with a junction box. 10 . A trip wire connecting piece assembly, the structure of the trip wire connecting piece assembly is the same as that of the connecting piece assembly.

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