CN215184923U - Terminal strip switching device of transformer substation - Google Patents

Abstract

The utility model discloses a switching device is arranged to transformer substation's terminal, include the incoming end, change the end and pull out the end of inserting, wherein: the access end is designed into a gradually expanding structure from left to right, and the outer wall of the access end is provided with threads; the access end is electrically connected with the switching end, and the outer wall of the switching end is coated with an insulating sleeve; the transfer end is electrically connected with the plug end through a connecting assembly, and the connecting assembly limits the plug end; the end of switching and the setting that corresponds each other of pulling out the plug, the utility model discloses effectively solved when not having reserve terminal or reserve terminal overlap joint difficulty, realized under the circumstances of incessant protection, carry out the direct current overlap joint to no reserve terminal device, can realize safe overlap joint direct current load in the circumstances of incessant protection, greatly reduced direct current overlap joint in-process direct current lose the risk of electricity.

Description

Terminal strip switching device of transformer substation

Technical Field

The utility model belongs to the technical field of the direct current system of transformer substation, concretely relates to terminal strip switching device of transformer substation.

Background

The direct current system of the transformer substation provides a direct current power supply for a control circuit, a relay protection device, an outlet circuit, a signal circuit, emergency lighting, an emergency power supply, breaker opening and closing operations in the transformer substation, and the reliability of the direct current system plays an important role in the safe operation of the transformer substation and is the guarantee of the safe operation of the transformer substation.

In the process of transforming the direct current system, the old direct current screen cannot be moved out in an electrified way, and the new direct current screen cannot be in place in an electrified way, so that the safety of equipment and personnel is ensured. The difficulty of the direct-current load cutting of the new direct-current screen and the old direct-current screen is high, the devices with the standby terminals can be directly lapped, the devices without the standby terminals need to be applied for stopping protection, partial equipment is caused to operate without protection, and great risk exists in the safe operation of a power grid.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a terminal strip switching device of transformer substation to solve foretell technical problem.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a transformer substation's terminal row switching device, includes incoming end, switching end and pulls out the end of inserting, wherein: the access end is designed into a gradually expanding structure from left to right, and the outer wall of the access end is provided with threads; the access end is electrically connected with the switching end, and the outer wall of the switching end is coated with an insulating sleeve; the transfer end is electrically connected with the plug end through a connecting assembly, and the connecting assembly limits the plug end; the transition end and the plugging end are arranged correspondingly, and a connecting wire is arranged at the tail of the plugging end.

Preferably, the access end comprises a first connecting column, a second connecting column, a third connecting column and a transition layer, and the outer walls of the first connecting column, the second connecting column and the third connecting column are provided with threads; a transition layer is arranged between the first connecting column and the second connecting column, and a transition layer is arranged between the second connecting column and the third connecting column; the width of the cross section of the access end is gradually reduced from the third connecting column to the first connecting column.

Preferably, the transition layer is designed into a gradually expanding structure from left to right.

Preferably, the switching end is designed to be a cylindrical structure, and a switching cavity for accommodating the insertion and extraction end is arranged in the switching end.

Preferably, the plugging and unplugging end is provided with an insulating sheath, and anti-skid grains are correspondingly arranged on two sides of the outer wall of the insulating sheath.

Preferably, the connecting assembly comprises a connecting groove arranged on the inner wall of the transfer end and a connecting ring arranged on the outer wall of the pull-plug end; the connecting groove and the connecting ring are arranged correspondingly, and are clamped with each other.

Preferably, the connecting assembly further comprises a transition groove arranged on the inner wall of the transition end, the transition groove is arranged at one end of the connecting groove and communicated with the transition groove, and the transition groove is designed to be in a gradually expanding structure from one end of the connecting groove to the tail end of the transition end.

Preferably, the plugging end is provided with a limiting ring, and the diameter of the limiting ring is larger than the inner diameter of the switching end.

The technical effect and advantage of the utility model, this switching device is arranged to transformer substation's terminal:

1. the problem that when no standby terminal exists or the standby terminal is difficult to lap is solved, the direct-current lap joint is carried out on the device without the standby terminal under the condition of uninterrupted protection, the safe lap joint of the direct-current load can be realized under the condition of uninterrupted protection, and the risk of direct-current power loss in the direct-current lap joint process is greatly reduced;

2. the access end is designed into a gradually expanding structure from left to right, so that the access end can adapt to terminal arrangement holes with different sizes, and can be quickly inserted into and fastened with the terminal arrangement holes, the terminal arrangement holes cannot easily fall off, and good contact is ensured;

3. the temporary direct-current power supply can be connected to the switching end under the condition that the wiring of the terminal block is not opened, power is supplied to the protection device, the working efficiency is improved, and the safety is guaranteed.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the specific structure of the present invention;

fig. 3 is a cross-sectional view of the present invention.

In the figure: 1. an access end; 2. a transfer end; 3. pulling out the plug end; 4. a connecting assembly; 5. a thread; 6. an insulating sleeve; 7. connecting a lead;

11. a first connecting column; 12. a second connecting column; 13. a third connecting column; 14. a transition layer;

21. a transfer cavity;

31. an insulating sheath; 32. anti-skid lines; 33. a limiting ring;

41. connecting grooves; 42. a connecting ring; 43. a transition groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 3 of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a terminal strip switching device of transformer substation as shown in fig. 1-3, include incoming end 1, switching end 2 and pull out plug end 3, wherein:

the incoming end 1 is the structure design that gradually expands from left to right, pegs graft through incoming end 1 and terminal row to this carries out electrically conductive connection, and because the terminal row that different models connect the hole size, model probably are different, through designing incoming end 1 for gradually expanding the shape structure, make incoming end 1 can adapt to not unidimensional terminal row and connect the hole, and make incoming end 1 can insert the terminal row fast and connect the hole and fasten, can not drop easily, guarantee good contact.

The outer wall of the access end 1 is provided with threads 5, when the connector is used, the threads 5 can enable the access end 1 to be firmly screwed into the terminal row connecting hole, and the connecting strength of the access end 1 and the terminal row can be effectively improved.

Access end 1 and switching end 2 electric connection the utility model discloses in, as preferred, switching end 2 adopts the copper material preparation, and access end 1 pegs graft with the terminal row, and switching end 2 is connected with access end 1 and guarantees that the conduction is unblocked, switching end 2 is through coupling assembling 4 and pulls out 3 electric connection of plug end, the utility model discloses 2 electricity of switching end adopts the copper pipe, pulls out plug end 3 and adopts columniform grafting mode, only need during the operation to pull out plug end 3 and insert switching end 2 in, can insert switching end 2 with interim DC power supply under the condition of not opening the terminal row wiring, for the protection device power supply, improved work efficiency and guaranteed the security.

The outer wall of the switching end 2 is coated with the insulating sleeve 6, the insulating sleeve 6 is coated on the whole outer surface of the switching end 2, safety can be guaranteed, the insulating sleeve 6 can enhance the air tightness of the connection between the access end 1 and the switching end 2, and meanwhile, when an operator holds the switching device to enable the access end 1 to be connected with the terminal strip in a plugging mode, electric shock cannot occur.

The connecting assembly 4 limits the plugging end 3, so that the plugging end 3 is connected with the transfer end 2 more tightly, and the plugging end 3 is prevented from being separated from the transfer end 2 easily under the action of external force.

The transfer end 2 and the plug end 3 are arranged correspondingly, a connecting wire 7 is arranged at the tail of the plug end 3, the connecting wire 7 is easy to extend and bend when in use, flexibility and convenience are achieved, and a temporary direct current power supply can be connected into the transfer end 2 through the connecting wire 7 to supply power for the protection device.

Access end 1 includes first spliced pole 11, second spliced pole 12, third spliced pole 13 and transition layer 14, just first spliced pole 11, second spliced pole 12 and 13 outer walls of third spliced pole all are equipped with screw thread 5, 1 cross-sectional width of access end is progressively diminished by third spliced pole 13 to first spliced pole 11, makes access end 1 can adapt to not unidimensional terminal row and connects the hole.

Be equipped with transition layer 14 between first spliced pole 11 and the second spliced pole 12, just be equipped with transition layer 14 between second spliced pole 12 and the third spliced pole 13, transition layer 14 is the structure design that expands gradually from left to right, and through transition layer 14's setting, it is more swift convenient when can making incoming end 1 gradually insert the terminal row.

Specifically, the transfer end 2 is designed to be a cylindrical structure, the transfer cavity 21 for accommodating the insertion and extraction end 3 is arranged in the transfer end 2, the insertion and extraction end 3 is inserted into the transfer cavity 21 of the transfer end 2, and the outer wall of the insertion and extraction end 3 is tightly connected with the inner wall of the transfer cavity 21, so that the connection strength between the insertion and extraction end 3 and the transfer end 2 can be effectively ensured.

Specifically, the inserting and pulling end 3 is provided with the insulating sheath 31, so that the air tightness between the connecting wire 7 and the inserting and pulling end 3 can be enhanced, meanwhile, when an operator pulls and inserts the inserting and pulling end 3 and the transfer end 2 in a handheld manner, no electric shock occurs, the operation safety can be ensured, the two sides of the outer wall of the insulating sheath 31 are correspondingly provided with the anti-slip patterns 32, and the operator can be prevented from slipping when the inserting and pulling end 3 and the transfer end 2 are pulled and inserted in a handheld manner.

Specifically, coupling assembling 4 is including setting up in the spread groove 41 of the inner wall of switching end 2 and setting up in the go-between 42 of pulling out the outer wall of spigot 3, spread groove 41 and go-between 42 correspond the setting each other, and spread groove 41 can hold go-between 42, and spread groove 41 is the annular, through spread groove 41 and the mutual block of go-between 42, can carry on spacingly to pulling out spigot 3, makes to pull out spigot 3 and is unlikely to fall out from switching end 2.

Specifically, the connecting assembly 4 further includes a transition groove 43 disposed on the inner wall of the transition end 2, the transition groove 43 is disposed at one end of the connecting groove 41 and is communicated with the transition groove 43, and the transition groove 43 is designed to be a gradually expanding structure from one end of the connecting groove 41 to the tail end of the transition end 2, so that the transition groove 43 can play a transition role in the plugging end 3, and the connecting ring 42 disposed on the plugging end 3 can be more easily inserted into the connecting groove 41 on the inner wall of the transition end 2.

Specifically, the plugging end 3 is provided with a limiting ring 33, and the diameter of the limiting ring 33 is larger than the inner diameter of the transition end 2, so that the plugging end 3 is prevented from being excessively plugged into the transition end 2, and the transition end 2 is prevented from being damaged.

The working principle is as follows: this terminal strip switching device of transformer substation when carrying out the direct current overlap joint, to the condition that does not have spare terminal, when the overlap joint:

1. firstly, inserting the access end 1 into the terminal strip, screwing the thread 5 into the terminal strip connecting hole to ensure reliable connection and prevent loosening and dropping, and then, performing conductive connection with the terminal strip, inserting the plug end 3 into the transition end 2, connecting a temporary direct-current power supply into the transition end 2 through a connecting wire 7 arranged at the tail part of the plug end 3, and supplying power for the protection device;

2. removing the old direct current cable and simultaneously connecting a new direct current power supply;

3. and (5) confirming that the power supply of the new direct current power supply is normal, and removing the temporary power supply and the switching device.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (8)

1. The utility model provides a terminal strip switching device of transformer substation, includes access end (1), switching end (2) and pulls out insert end (3), its characterized in that:

the access end (1) is designed into a gradually expanding structure from left to right, and the outer wall of the access end (1) is provided with a thread (5);

the access end (1) is electrically connected with the switching end (2), and an insulating sleeve (6) is coated on the outer wall of the switching end (2);

the transfer end (2) is electrically connected with the plug end (3) through a connecting component (4), and the connecting component (4) limits the plug end (3);

the transfer end (2) and the plug end (3) are arranged correspondingly, and a connecting wire (7) is arranged at the tail of the plug end (3).

2. The substation terminal block switching device according to claim 1, wherein the access end (1) comprises a first connecting column (11), a second connecting column (12), a third connecting column (13) and a transition layer (14), and the outer walls of the first connecting column (11), the second connecting column (12) and the third connecting column (13) are provided with threads (5);

a transition layer (14) is arranged between the first connecting column (11) and the second connecting column (12), and a transition layer (14) is arranged between the second connecting column (12) and the third connecting column (13);

the cross section width of the access end (1) is gradually reduced from the third connecting column (13) to the first connecting column (11).

3. A substation terminal block switching device according to claim 2, characterized in that: the transition layer (14) is designed into a gradually expanding structure from left to right.

4. A substation terminal block switching device according to claim 1, characterized in that: the transfer end (2) is designed to be a cylindrical structure, and a transfer cavity (21) for accommodating the insertion of the plug end (3) is arranged in the transfer end (2).

5. A substation terminal block switching device according to claim 1, characterized in that: the plug end (3) is provided with an insulating sheath (31), and two sides of the outer wall of the insulating sheath (31) are correspondingly provided with anti-skidding lines (32).

6. The substation terminal block switching device according to claim 1, wherein the connecting assembly (4) comprises a connecting groove (41) arranged on the inner wall of the switching end (2) and a connecting ring (42) arranged on the outer wall of the plug end (3);

the connecting groove (41) and the connecting ring (42) are arranged correspondingly, and the connecting groove (41) and the connecting ring (42) are mutually clamped.

7. The substation terminal block switching device according to claim 1, wherein the connecting assembly (4) further comprises a transition groove (43) arranged on an inner wall of the switching end (2), the transition groove (43) is arranged at one end of the connecting groove (41) and communicated with the transition groove (43), and the transition groove (43) is designed in a gradually expanding structure from one end of the connecting groove (41) to the tail end of the switching end (2).

8. The substation terminal block switching device according to claim 1, wherein a limiting ring (33) is arranged on the plug end (3), and the diameter of the limiting ring (33) is larger than the inner diameter of the switching end (2).

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