A 10kV pole-mounted transformer low-voltage stub head large-current protection device and method

Abstract

The application discloses a 10kV pole-mounted transformer low-voltage post head large-current protection device, and relates to the technical field of transformers, which comprises a base body, a plurality of groups of wiring terminals and a plurality of groups of low-voltage post heads on a mounting plate and a table top; and a current leading part comprising a current leading plate, a support plate and a leading terminal; the current leading plate can lead the current of the low-voltage post head to the end thereof. The application has the beneficial effects that the heat generation of the low-voltage post head is reduced by prolonging the current path. The long-distance design of the current leading plate disperses the heat during the transmission of the current, avoids the local overheating phenomenon and prolongs the service life of the device. The design of the support plate and the support column ensures the stable transmission of the current and reduces the safety hazards. The insulation performance of the support plate prevents the current leakage and improves the safety of the whole device. The design of the leading terminal and the fixing part ensures the firmness and reliability of the wire connection and reduces the faults caused by poor connection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a 10kV pole-mounted transformer low-voltage post head large current protection device. BACKGROUND

[0002] In the application of 10kV pole-mounted 200kVA and above transformers, the design of the low-voltage side connection post head is increasingly unreasonable. Specifically, the cross section of the nut, washer and other components on the conductive rod is insufficient, and a single bolt fixing method is used, resulting in a small contact area. Whenever the peak load occurs, the connection bolt gradually loosens due to the thermal expansion and contraction effect of the metal and the swinging of the conductor caused by the wind. These problems ultimately lead to the heating phenomenon of the distribution transformer post head, especially when the transformer load is large, the low-voltage post head frequently overheats, and even the wire clamp and conductive rod are burned out.

[0003] In addition, one of the most common problems in the actual operation of distribution equipment is the burning out of the transformer low-voltage side post head connection part. This not only causes the low-voltage side connection conductor to overheat and the nut to burn, but also causes the aging of the heat-generating rubber beads and further causes the aging and deterioration of the transformer oil and the decline of the insulation performance. More seriously, the porcelain bushing may burst and leak oil at high temperature, ultimately causing damage to the transformer. SUMMARY

[0004] In view of the above or existing problems in the prior art, the present application is proposed.

[0005] Therefore, the purpose of the present application is to provide a 10kV pole-mounted transformer low-voltage post head large current protection device, which can solve the problem of unreasonable design of the low-voltage post head, leading to frequent overheating of the low-voltage post head.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a 10kV pole-mounted transformer low-voltage post head large current protection device, comprising a base body, a mounting plate arranged at the bottom of the base body, a table top arranged at the end of the base body, a plurality of groups of wiring terminals arranged on the table top, and a plurality of groups of low-voltage post heads arranged on the other side of the table top.

[0007] A drainage component, comprising a drainage plate arranged on one side of the low-voltage post head, a support plate arranged at the bottom of the drainage plate, and a lead terminal arranged on one side of the drainage plate.

[0008] The drainage plate can drain the current of the low-voltage post head to the end thereof.

[0009] As a preferred scheme of the 10kV pole-mounted transformer low-voltage post head large current protection device, wherein: the table top is provided with a clamping column on both sides thereof.

[0010] The support plate includes a mating plate that connects to the snap-fit ​​post, a U-shaped plate disposed on one side of the mating plate, and a corner plate disposed at the bottom of the U-shaped plate.

[0011] As a preferred embodiment of the 10kV pole-mounted transformer low-voltage pile head high current protection device of the present invention, wherein: the snap-fit ​​post is connected and mated with the mating plate;

[0012] The support plate is made of non-conductive metal material, and a support column is provided at the bottom of the support plate.

[0013] As a preferred embodiment of the high current protection device for low-voltage pile head of the 10kV pole-mounted transformer described in this invention, wherein: the low-voltage pile head includes a terminal block disposed at its end;

[0014] A first gasket is fitted onto the terminal block, a gasket is fitted onto the first gasket, and the drain plate is fitted onto the gasket. A set of first nuts is fitted onto the drain plate.

[0015] As a preferred embodiment of the 10kV pole-mounted transformer low-voltage pile head high current protection device of the present invention, the supporting column includes a bolt that penetrates and connects to the platform, a sleeve that is sleeved on the outside of the bolt, and a second nut that penetrates and is disposed at the upper end of the U-shaped plate.

[0016] As a preferred embodiment of the high current protection device for low-voltage terminals of the 10kV pole-mounted transformer described in this invention, the current-draining plate is made of conductive metal material and can divert current from the terminal block to it.

[0017] The diversion plate is fixedly attached to the U-shaped plate by fasteners; the U-shaped plate provides support for the diversion plate.

[0018] As a preferred embodiment of the 10kV pole-mounted transformer low-voltage pile head high current protection device of the present invention, wherein: the current-draining plate includes snap-fit ​​grooves disposed at both ends thereon;

[0019] One of the snap-fit ​​slots is connected to the gasket, and the other snap-fit ​​slot is connected to the lead terminal.

[0020] As a preferred embodiment of the 10kV pole-mounted transformer low-voltage pile head high current protection device of the present invention, wherein: the lead terminal includes a fixing cap disposed inside the snap-fit ​​groove;

[0021] The fixing cap securely connects the lead terminal.

[0022] Another objective of this invention is to provide a method for high current protection of low-voltage pile heads of 10kV pole-mounted transformers, comprising connecting one end of a current-draining plate to a gasket via a snap-fit ​​groove and fastening it with a first nut;

[0023] Connect the other end of the drain plate to the lead terminal through the snap-fit ​​groove and secure it with a fixing cap;

[0024] Connect the connecting plate of the support plate to the snap-fit ​​post on the table, and fix it to the table using the support post;

[0025] Secure the drain plate to the U-shaped plate and connect the wires to the lead terminals.

[0026] As a preferred embodiment of the high current protection device method for low-voltage terminals of 10kV pole-mounted transformers described in this invention, the current-draining plate is made of conductive metal material and is used to divert the current from the terminal block to the lead terminal, and the support plate is made of non-conductive metal material and is used to provide insulation support to prevent current leakage.

[0027] The beneficial effects of this invention are as follows: This device reduces heat generation at the low-voltage pile head by extending the current path. The long-distance design of the diversion plate disperses heat during current transmission, preventing localized overheating and extending the equipment's service life. The design of the support plate and support column ensures stable current transmission and reduces safety hazards. The insulation performance of the support plate prevents current leakage and improves the overall safety of the device. The design of the lead terminals and fasteners ensures the robustness and reliability of the wire connections, reducing malfunctions caused by poor connections. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 For the present invention Figure 1 Enlarged view of the support plate structure at point A.

[0031] Figure 3 This is a front structural cross-sectional view of the present invention.

[0032] Figure 4 This is a magnified view of a partial structure of the present invention. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0036] Example 1

[0037] Reference Figure 1 This is the first embodiment of the present invention. This embodiment provides a 10kV pole-mounted transformer low-voltage pile head high current protection device, including a base 100, including a mounting plate 101 disposed at its bottom, a platform 102 disposed at its end, multiple sets of wiring terminals 102a disposed on the platform 102, and multiple sets of low-voltage pile heads 102b disposed on the other side of the platform 102.

[0038] The diversion component 200 includes a diversion plate 201 snapped onto one side of the low-pressure pile head 102b, a support plate 202 disposed at the bottom of the diversion plate 201, and a lead terminal 203 disposed on one side of the diversion plate 201.

[0039] The diversion plate 201 can divert the current from the low-voltage pile head 102b to its end.

[0040] It should be noted that the base 100 in this embodiment is a 10kV pole-mounted transformer, and the mounting plate 101 can support the base 100 on the pole. The platform 102 on the surface of the base 100 is the line connection terminal, specifically the high-voltage lead-out terminal / also called a high-voltage terminal block. Each columnar object is made of multiple layers of ceramic or composite material, serving as electrical insulation to ensure the safe operation of the high-voltage circuit. The high-voltage conductors extending from inside the transformer ensure sufficient distance between conductors to meet electrical safety requirements. The low-voltage terminal 102b is the low-voltage side connection terminal. Generally, the terminal clamp is directly connected to the low-voltage connection terminal, which can cause frequent overheating of the low-voltage terminal 102b.

[0041] Preferably, to avoid overheating of the low-voltage terminal 102b, this example extends the terminal clamp, which was originally directly connected to the end face of the low-voltage terminal 102b, to the end of the current-draining plate 201, which is far away from the low-voltage terminal 102b, through the current-draining component 200. This avoids overheating of the low-voltage side connecting wire, the transformer terminal connecting clamp, and the conductive rod, as well as the burning of the nut. It also avoids aging and oil leakage of the heating glue beads, which further leads to aging and deterioration of the transformer oil and a decrease in its insulation performance.

[0042] Preferably, the current diversion component 200 comprises a current diversion plate 201, a support plate 202 at the bottom of the current diversion plate 201, and a lead terminal 203 on one side of the current diversion plate 201. The current diversion plate 201 is a relatively long conductive rectangular plate, which can effectively divert the current from the low-voltage pile head 102b to a distant location. The current diversion plate 201 is supported at its bottom by the support plate 202. The support plate 202 is a non-conductive metal oxide, such as aluminum oxide.

[0043] Example 2

[0044] Reference Figures 1-4 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0045] It also includes a tabletop 102 with locking posts 102c on both sides;

[0046] The support plate 202 includes a mating plate 202a that is connected to the snap-fit ​​post 102c, a U-shaped plate 202b disposed on one side of the mating plate 202a, and a corner plate 202c disposed at the bottom of the U-shaped plate 202b.

[0047] Furthermore, the snap-fit ​​post 102c is mated with the mating plate 202a;

[0048] The support plate 202 is made of non-conductive metal material, and a support column 204 is provided at the bottom of the support plate 202.

[0049] Furthermore, the low-pressure pile head 102b includes a wiring post 102b-1 disposed at its end;

[0050] A first gasket 301 is fitted onto the terminal block 102b-1, a gasket 302 is fitted onto the first gasket 301, and a drain plate 201 is fitted onto the gasket 302. A set of first nuts 303 are fitted onto the drain plate 201.

[0051] Furthermore, the support column 204 includes a bolt 204a that is connected through to the table 102, a sleeve 204b that is sleeved on the outside of the bolt 204a, and a second nut 204c that is provided through to the upper end of the U-shaped plate 202b.

[0052] Furthermore, the drain plate 201 is made of conductive metal material, which can guide the terminal block 102b-1 to this location;

[0053] The diversion plate 201 is fixedly overlapped on the U-shaped plate 202b by the fastener 304; the U-shaped plate 202b provides support for the diversion plate 201.

[0054] Furthermore, the drainage plate 201 includes snap-fit ​​grooves 201a disposed at both ends thereon;

[0055] One of the slots 201a is connected to the pad 302, and the other slot 201a is connected to the lead terminal 203.

[0056] Furthermore, the lead terminal 203 includes a fixing cap 203a disposed inside the snap-fit ​​groove 201a;

[0057] The fixing cap 203a securely connects the lead terminal 203.

[0058] It should be noted that the mounting plate 101 is fixedly installed at the bottom of the base 100 to secure the base 100 to the pole, ensuring the stability and safety of the device. The platform 102 is the end of the base 100 and is used to install various electrical connection components. Terminal blocks 102a are located on the platform 102 for connecting to high-voltage power supplies. Each high-voltage lead-out terminal is made of multi-layer ceramic or composite material, providing electrical insulation to ensure the safe operation of the high-voltage circuit. Low-voltage terminals 102b are located on the other side of the platform 102 and are used to connect low-voltage side conductors. The low-voltage terminals 102b include terminal blocks 102b-1 at their ends. Terminal blocks 102b-1 are the line connection terminals. Two sets of snap-fit ​​posts 102c are also provided on both sides of the platform 102 for fixing the support plate 202.

[0059] Preferably, the current-draining component 200 extends the terminal clamp, which was originally directly connected to the end face of the low-voltage terminal head 102b, to the end of the current-draining plate 201, which is away from the low-voltage terminal head 102b. The current-draining plate 201 is snap-fitted onto one side of the low-voltage terminal head 102b to divert the current from the low-voltage terminal head 102b to its end. The current-draining plate 201 is made of conductive metal, which effectively extends the current path and reduces heat generation in the low-voltage terminal head 102b. The ends of both sides of the current-draining plate 201 are provided with snap-fit ​​grooves 201a, one of which connects to the gasket 302, and the other connects to the lead terminal 203. The support plate 202 consists of a mating plate 202a that connects to the snap-fit ​​post 102c, a U-shaped plate 202b disposed on one side of the mating plate 202a, and a corner plate 202c disposed at the bottom of the U-shaped plate 202b. The support plate 202 is made of non-conductive metal, and a support column 204 is provided at the bottom of the support plate 202. The mating plate 202a is aligned with the snap-fit ​​post 102c on the platform 102 to ensure the stable fixation of the support plate 202. The U-shaped plate 202b provides support for the diversion plate 201, ensuring the stability and reliability of the diversion plate 201. The corner plate 202c is welded to the bottom of the U-shaped plate 202b to increase the overall strength of the support plate 202. A lead terminal 203 is located on one side of the diversion plate 201 for connecting the low-voltage side wire. The lead terminal 203 includes a fixing cap 203a located inside the snap-fit ​​groove 201a, which fixes the lead terminal 203 in place. A first gasket 301 is fitted onto the terminal block 102b-1 for initial fixation of the terminal block 102b-1. A gasket 302 is fitted onto the first gasket 301 to increase the contact area and reduce contact resistance. A first nut 303 is fitted onto the diversion plate 201 to secure it. A fastener 304 securely attaches the diversion plate 201 to the U-shaped plate 202b, ensuring the stability and reliability of the diversion plate 201. A bolt 204a is threaded through the platform 102 to secure the support column 204. A sleeve 204b is fitted onto the outside of the bolt 204a to increase the stability of the fixing point. A second nut 204c is threaded through the upper end of the U-shaped plate 202b to secure the support column 204.

[0060] Preferably, the end of the low-voltage terminal head 102b is provided with a terminal block 102b-1 for connecting the conductor on the low-voltage side. A first gasket 301 is fitted onto the terminal block 102b-1, and a gasket 302 is fitted onto the first gasket 301 to increase the contact area and reduce the contact resistance. The current-draining plate 201 is connected to the gasket 302 through a snap-fit ​​groove 201a, thereby introducing the current from the low-voltage terminal head 102b into the current-draining plate 201. The current-draining plate 201 is a conductive metal material with good conductivity, which can effectively conduct current. The current-draining plate 201 is a long conductive rectangular plate, which reduces the heat generation of the low-voltage terminal head 102b by extending the current path. Specifically, the current enters the current-draining plate 201 from the terminal block 102b-1 through the gasket 302, and then is transmitted along the length of the current-draining plate 201. The other end of the current-draining plate 201 is connected to the lead terminal 203 through the snap-fit ​​groove 201a. Lead terminal 203 is used to connect the low-voltage side wires to ensure that the current can be smoothly transmitted to the next electrical device.

[0061] In summary, this device reduces heat generation in the low-voltage pile head 102b by extending the current path. The long-distance design of the diversion plate 201 disperses heat during current transmission, preventing localized overheating and extending the equipment's lifespan. The design of the support plate 202 and support column 204 ensures stable current transmission and reduces safety hazards. The insulation performance of the support plate 202 prevents current leakage and improves the overall safety of the device. The design of the lead terminal 203 and fixing component 304 ensures the robustness and reliability of the wire connection, reducing malfunctions caused by poor connections. The use of the fixing cap 203a and the first nut 303 further enhances connection stability. The modular design of the diversion component 200 makes maintenance and replacement more convenient and reduces maintenance costs. If a component is damaged, it can be quickly replaced without affecting the normal operation of the entire system.

[0062] Example 3

[0063] This is the third embodiment of the present invention, which differs from the previous two embodiments in that it further includes connecting one end of the diversion plate 201 to the gasket 302 through the snap-fit ​​groove 201a and fastening it with the first nut 303;

[0064] The other end of the diversion plate 201 is connected to the lead terminal 203 through the snap-fit ​​groove 201a and fixed with the fixing cap 203a;

[0065] Connect the mating plate 202a of the support plate 202 to the snap-fit ​​post 102c on the table 102, and fix it to the table 102 by the support column 204;

[0066] The diversion plate 201 is fixedly attached to the U-shaped plate 202b, and the wire is connected to the lead terminal 203.

[0067] Furthermore, the current-draining plate 201 is made of conductive metal and is used to divert the current from the terminal block 102b-1 to the lead terminal 203, while the support plate 202 is made of non-conductive metal and is used to provide insulation support to prevent current leakage.

[0068] It should be noted that the base 100 is fixed to the pole by the mounting plate 101; multiple sets of terminals 102a and low-voltage terminals 102b are installed on the platform 102 of the base 100, wherein the end of the low-voltage terminal 102b is provided with a terminal block 102b-1; a first gasket 301 and a gasket 302 are sequentially sleeved on the terminal block 102b-1; one end of the diversion plate 201 is connected to the gasket 302 through the snap-fit ​​groove 201a and fastened with a set of first nuts 303; the other end of the diversion plate 201 is connected to the lead terminal 203 through the snap-fit ​​groove 201a and secured with a fixing cap 203. a. Fixing: Connect the mating plate 202a of the support plate 202 to the snap-fit ​​post 102c on the table 102, and fix it to the table 102 by the support column 204, wherein the support column 204 includes a bolt 204a that passes through and connects to the table 102, a sleeve 204b that is sleeved on the outside of the bolt 204a, and a second nut 204c that passes through and is set on the upper end of the U-shaped plate 202b; fix the diversion plate 201 onto the U-shaped plate 202b to ensure the stability and reliability of the diversion plate 201; connect the low-voltage side wire to the lead terminal 203 to complete the installation and use of the entire device.

[0069] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-current protection device for low-voltage pile heads of a 10kV pole-mounted transformer, characterized in that: It includes a base (100), including a mounting plate (101) disposed at its bottom, a platform (102) disposed at its end, multiple sets of wiring terminals (102a) disposed on the platform (102), and multiple sets of low-voltage pile heads (102b) disposed on the other side of the platform (102). The diversion component (200) includes a diversion plate (201) snapped onto one side of the low-pressure pile head (102b), a support plate (202) disposed at the bottom of the diversion plate (201), and a lead wire terminal (203) disposed on one side of the diversion plate (201). The diversion plate (201) can divert the current from the low-voltage pile head (102b) to its end; The tabletop (102) has snap-fit ​​posts (102c) on both sides. The support plate (202) includes a mating plate (202a) that is connected to the snap-fit ​​post (102c), a U-shaped plate (202b) disposed on one side of the mating plate (202a), and a corner plate (202c) disposed at the bottom of the U-shaped plate (202b). The snap-fit ​​post (102c) is engaged with the mating plate (202a); The support plate (202) is made of non-conductive metal material, and a support column (204) is provided at the bottom of the support plate (202). The low-pressure pile head (102b) includes a terminal block (102b-1) disposed at its end. A first gasket (301) is fitted onto the terminal block (102b-1), a gasket (302) is fitted onto the first gasket (301), and a drain plate (201) is fitted onto the gasket (302). A set of first nuts (303) is fitted onto the drain plate (201). The drain plate (201) is made of conductive metal material and can drain the terminal block (102b-1) to it; The diversion plate (201) is fixedly attached to the U-shaped plate (202b) by a fastener (304); the U-shaped plate (202b) provides support for the diversion plate (201); The drainage plate (201) includes snap-fit ​​grooves (201a) disposed at both ends thereon. One of the snap-fit ​​slots (201a) is connected to the gasket (302), and the other snap-fit ​​slot (201a) is connected to the lead terminal (203).

2. The 10kV pole-mounted transformer low-voltage pile head high current protection device as described in claim 1, characterized in that: The support column (204) includes a bolt (204a) that passes through and is connected to the table surface (102), a sleeve (204b) that is sleeved on the outside of the bolt (204a), and a second nut (204c) that passes through and is disposed at the upper end of the U-shaped plate (202b).

3. The 10kV pole-mounted transformer low-voltage pile head high current protection device as described in claim 2, characterized in that: The lead terminal (203) includes a fixing cap (203a) disposed inside the snap-fit ​​groove (201a); The fixing cap (203a) fixes the lead terminal (203) in place.

4. A method for high current protection of low-voltage pile heads of a 10kV pole-mounted transformer, characterized in that: The device includes the 10kV pole-mounted transformer low-voltage pile head high current protection device as described in any one of claims 1 to 3, and also includes the following steps; One end of the diversion plate (201) is connected to the gasket (302) through the snap-fit ​​groove (201a) and fastened with the first nut (303); The other end of the drain plate (201) is connected to the lead terminal (203) through the snap-fit ​​groove (201a) and fixed with the fixing cap (203a); Connect the mating plate (202a) of the support plate (202) to the snap-fit ​​post (102c) on the table (102), and fix it on the table (102) by the support column (204); The drain plate (201) is fixedly attached to the U-shaped plate (202b), and the wire is connected to the lead terminal (203).

5. The method for high current protection of low-voltage pile heads of 10kV pole-mounted transformers as described in claim 4, characterized in that: The current-draining plate (201) is made of conductive metal material and is used to divert the current from the terminal block (102b-1) to the lead terminal (203). The support plate (202) is made of non-conductive metal material and is used to provide insulation support to prevent current leakage.

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