High-current protection device and method for low-voltage pile head of 10kV pole-mounted transformer

Abstract

The invention discloses a 10kV pole-mounted transformer low-voltage pile head large-current protection device, and relates to the technical field of transformers, the 10kV pole-mounted transformer low-voltage pile head large-current protection device comprises a base body, an erection plate, a table board, multiple groups of wiring terminals and multiple groups of low-voltage pile heads; the drainage component comprises a drainage plate, a supporting plate and a lead terminal; the drainage plate can drain current of the low-voltage pile head to the end of the drainage plate. The low-voltage pile head has the beneficial effect that heating of the low-voltage pile head is reduced by prolonging a current path. Due to the long-distance design of the drainage plate, the heat of the current is dispersed in the transmission process, the local overheating phenomenon is avoided, and the service life of the equipment is prolonged. The design of the supporting plate and the supporting stand column ensures stable transmission of current, and potential safety hazards are reduced. The insulating property of the supporting plate prevents current leakage, and the safety of the whole device is improved. The design of the lead terminals and the fixing pieces ensures the firmness and reliability of wire connection, and reduces faults caused by poor connection.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to a low-voltage pile head high-current protection device for a 10kV pole-mounted transformer. Background Art

[0002] In the application of 10kV pole-mounted 200kVA and above transformers, the unreasonable design of the low-voltage side connection pile head has become increasingly prominent. Specifically, the cross-section of the nuts, washers and other components on the conductive rod is insufficient, and the single bolt fixing method is used, resulting in a small contact area. After each peak load, the connection bolts gradually loosen due to the thermal expansion and contraction effect of the metal at the connection of the conductive rod nut and the swing of the wire caused by wind. These problems eventually lead to the heating of the distribution transformer pile head. Especially when the transformer load is large, the low-voltage pile head frequently heats up and even burns the wire clamp and conductive rod.

[0003] In addition, one of the most common problems in the actual operation of power distribution equipment is the burning of the connection part of the transformer low-voltage side pile head. This will not only cause the heating of the low-voltage side connecting wire and the transformer pile head connecting wire clamp, the conductive rod and the scorching of the nut, but also cause the aging and oil leakage of the heating rubber beads, further leading to the aging and deterioration of the transformer oil and the degradation of insulation performance. More seriously, the porcelain bushing may burst and leak oil under high temperature, eventually causing the transformer to be damaged. Summary of the invention

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

[0005] Therefore, the purpose of the present invention is to provide a 10kV pole-mounted transformer low-voltage pile head high-current protection device, which can solve the problem of unreasonable design of the low-voltage pile head, resulting in frequent heating of the low-voltage pile head.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A 10kV pole-mounted transformer low-voltage pile head high-current protection device, which includes a base, including a mounting plate arranged at the bottom thereof, a table arranged at the end thereof, a plurality of groups of connection terminals arranged on the table, and a plurality of groups of low-voltage pile heads arranged on the other side of the table;

[0007] A drainage component, comprising a drainage plate clamped on one side of the low-pressure pile 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 guide plate can guide the low-voltage pile head current to its end.

[0009] As a preferred solution of the 10kV pole-mounted transformer low-voltage pile head high-current protection device of the present invention, wherein: the table top is provided with clamping columns on both sides;

[0010] The support plate includes a docking plate connected to the clamping column, a U-shaped plate arranged on one side of the docking plate, and a corner plate arranged at the bottom of the U-shaped plate.

[0011] As a preferred solution of the 10kV pole-mounted transformer low-voltage pile head high-current protection device of the present invention, wherein: the clamping column is in contact with the docking plate;

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

[0013] As a preferred solution of the 10kV pole-mounted transformer low-voltage pile head high-current protection device of the present invention, wherein: the low-voltage pile head includes a wiring pile arranged at its end;

[0014] The wiring post is sleeved with a first gasket, the first gasket is sleeved with a gasket, the guide plate is sleeved on the gasket, and the guide plate is sleeved with a group of first nuts.

[0015] As a preferred solution of the 10kV pole-mounted transformer low-voltage pile head high-current protection device described in the present invention, the supporting column includes a bolt connected to the table top, a sleeve sleeved on the outside of the bolt, and a second nut arranged on the upper end of the U-shaped plate.

[0016] As a preferred solution of the 10kV pole-mounted transformer low-voltage pile head high current protection device of the present invention, wherein: the diversion plate is a conductive metal material, and the wiring pile can be diverted thereto;

[0017] The guide plate is fixedly overlapped on the U-shaped plate through a fixing piece; the U-shaped plate provides a supporting force for the guide plate.

[0018] As a preferred solution of the 10kV pole-mounted transformer low-voltage pile head high-current protection device of the present invention, wherein: the guide plate includes a clamping groove arranged at both side ends thereof;

[0019] One of the clamping grooves is connected to the gasket, and the other clamping groove is connected to the lead terminal.

[0020] As a preferred solution 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 arranged on the inner side of the clamping groove;

[0021] The fixing cap fixes and connects the lead terminal.

[0022] Another object of the present invention is to provide a 10kV pole-mounted transformer low-voltage pile head high current protection method, comprising connecting one end of the guide plate to the gasket through a clamping groove and fastening it with a first nut;

[0023] Connect the other end of the drain plate to the lead terminal through the clamping groove and fix it with a fixing cap;

[0024] Connect the docking plate of the support plate to the clamping column on the table top, and fix it on the table top through the support column;

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

[0026] As a preferred solution of the method for installing high current protection for low-voltage pile head of 10kV pole-mounted transformer described in the present invention, the drain plate is made of conductive metal material, used to drain the current of the terminal pile to the lead terminal, and the support plate is made of non-conductive metal material, used to provide insulating support to prevent current leakage.

[0027] Beneficial effects of the present invention: The device reduces the heating of the low-voltage pile head by extending the current path. The long-distance design of the guide plate disperses the heat during the current transmission process, avoids local overheating, and extends the service life of the equipment. The design of the support plate and the support column ensures the stable transmission of the current and reduces safety hazards. The insulation performance of the support plate prevents current leakage and improves the safety of the entire device. The design of the lead terminal and the fixing ensures the firmness and reliability of the wire connection and reduces the failure caused by poor connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It 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 A in the figure.

[0031] Figure 3 It is a schematic cross-sectional view of the front structure of the present invention.

[0032] Figure 4 It is an enlarged view of the local structure of the present invention. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1

[0037] Reference Figure 1 , which is the first embodiment of the present invention, and provides a 10kV pole-mounted transformer low-voltage pile head high current protection device, comprising a base 100, including a mounting plate 101 arranged at the bottom thereof, a table 102 arranged at the end thereof, a plurality of groups of connection terminals 102a arranged on the table 102, and a plurality of groups of low-voltage pile heads 102b arranged on the other side of the table 102;

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

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

[0040] It should be noted that the substrate 100 in this embodiment is a 10kV pole-mounted transformer, and the mounting plate 101 can mount the substrate 100 on the line pole. The table 102 on the surface of the substrate 100 is a line connection end, specifically a high-voltage lead-out terminal / also called a high-voltage terminal. Each columnar object is made of multilayer ceramic or composite material, which plays a role in electrical insulation to ensure the safe operation of the high-voltage circuit. The high-voltage conductor extending from the inside of the transformer ensures that the distance between the conductors is far enough to meet electrical safety requirements. The low-voltage pile head 102b is a low-voltage side connection pile head, and generally the wiring clamp will be directly connected to the low-voltage connection pile head, which will cause the low-voltage pile head 102b to frequently heat up.

[0041] Preferably, in order to avoid heating of the low-voltage pile head 102b, the present embodiment extends the wiring clamp originally directly connected to the end face of the low-voltage pile head 102b through the drainage component 200 to drain to the end of the drainage plate 201 away from the low-voltage pile head 102b. This can avoid heating of the low-voltage side connecting wire and the transformer pile head connecting wire clamp, the conductive rod and burning of the nut, and can also cause aging and oil leakage of the heating rubber beads, further leading to aging and deterioration of the transformer oil and degradation of the insulation performance.

[0042] Preferably, the drainage component 200 is composed of a drainage plate 201, a support plate 202 at the bottom of the drainage plate 201, and a lead terminal 203 at one side of the drainage plate 201. The drainage plate 201 is a long conductive rectangular plate, which can effectively guide the current of the low-voltage pile head 102b to a distant place. The drainage plate 201 is supported by a support plate 202 installed at the bottom. The support plate 202 is a non-conductive metal oxide, which can be aluminum oxide.

[0043] Example 2

[0044] Reference Figure 1 to Figure 4 , which is the second embodiment of the present invention, and which is different from the first embodiment in that:

[0045] It also includes a table top 102 with clamping posts 102c disposed on both sides thereof;

[0046] The support plate 202 includes a docking plate 202a connected to the clamping column 102c, a U-shaped plate 202b disposed on one side of the docking plate 202a, and an angle plate 202c disposed at the bottom of the U-shaped plate 202b.

[0047] Furthermore, the clamping column 102c is connected and matched with the docking plate 202a;

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

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

[0050] The terminal post 102 b - 1 is sleeved with a first gasket cap 301 , a gasket 302 is sleeved on the first gasket cap 301 , and the guide plate 201 is sleeved on the gasket 302 , and a group of first nuts 303 are sleeved on the guide plate 201 .

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

[0052] Furthermore, the guide plate 201 is made of a conductive metal material, and the connection post 102b-1 can be guided thereto;

[0053] The guide plate 201 is fixedly overlapped on the U-shaped plate 202 b through the fixing piece 304 ; the U-shaped plate 202 b provides a supporting force for the guide plate 201 .

[0054] Furthermore, the guide plate 201 includes a clamping groove 201a provided at both ends thereof;

[0055] One of the clamping grooves 201 a is connected to the gasket 302 , and the other clamping groove 201 a is connected to the lead terminal 203 .

[0056] Furthermore, the lead terminal 203 includes a fixing cap 203a disposed inside the clamping groove 201a;

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

[0058] It should be noted that the mounting plate 101 is fixedly arranged at the bottom of the base 100, and is used to fix the base 100 on the line pole to ensure the stability and safety of the device. The table 102 is the end of the base 100, and is used to install various electrical connection components. The terminal 102a is arranged on the table 102 for connecting the high-voltage power supply. Each high-voltage lead-out terminal is made of multilayer ceramic or composite material, which plays the role of electrical insulation and ensures the safe operation of the high-voltage circuit. The low-voltage pile head 102b is located on the other side of the table 102, and is used to connect the wire on the low-voltage side. The low-voltage pile head 102b includes a wiring pile 102b-1 arranged at its end. The wiring pile 102b-1 is a line connection end, and two groups of clamping columns 102c are also arranged on both sides of the table 102 for fixing the support plate 202.

[0059] Preferably, the drainage component 200 extends the wiring clip originally directly connected to the end face of the low-voltage pile head 102b to drain to the end of the drainage plate 201 away from the low-voltage pile head 102b. The drainage plate 201 is clamped and arranged on one side of the low-voltage pile head 102b, and is used to drain the current of the low-voltage pile head 102b to its end. The drainage plate 201 is a conductive metal material, which can effectively extend the current path and reduce the heating of the low-voltage pile head 102b. The ends of both sides of the drainage plate 201 are provided with clamping grooves 201a, one of which is connected to the gasket 302, and the other is connected to the lead terminal 203. The support plate 202 is composed of a docking plate 202a connected to the clamping column 102c, a U-shaped plate 202b arranged on one side of the docking plate 202a, and a corner plate 202c arranged at the bottom of the U-shaped plate 202b. The support plate 202 is made of a non-conductive metal material, and a support column 204 is provided at the bottom of the support plate 202. The docking plate 202a is connected to the clamping column 102c on the table 102 to ensure the stable fixation of the support plate 202. The U-shaped plate 202b provides a supporting force for the drain plate 201 to ensure the stability and reliability of the drain plate 201. The angle plate 202c is welded to the bottom of the U-shaped plate 202b to increase the overall strength of the support plate 202. The lead terminal 203 is provided on one side of the drain plate 201 for connecting the wire on the low-voltage side. The lead terminal 203 includes a fixing cap 203a provided on the inner side of the clamping groove 201a, and the fixing cap 203a fixes the lead terminal 203. The first pad cap 301 is sleeved on the wiring post 102b-1 for preliminarily fixing the wiring post 102b-1. The gasket 302 is sleeved on the first gasket cap 301 to increase the contact area and reduce the contact resistance. The first nut 303 is sleeved on the guide plate 201 to fasten the guide plate 201. The fixing member 304 is used to fix the guide plate 201 on the U-shaped plate 202b to ensure the stability and reliability of the guide plate 201. The bolt 204a is connected to the table 102 to fix the support column 204. The sleeve 204b is sleeved on the outside of the bolt 204a to increase the stability of the fixing point. The second nut 204c is set on the upper end of the U-shaped plate 202b to fasten the support column 204.

[0060] Preferably, the end of the low-voltage pile head 102b is provided with a wiring pile 102b-1 for connecting the wire on the low-voltage side. The wiring pile 102b-1 is sleeved with a first pad cap 301, and the first pad cap 301 is sleeved with a gasket 302 to increase the contact area and reduce the contact resistance. The drain plate 201 is connected to the gasket 302 through the clamping groove 201a, so that the current of the low-voltage pile head 102b is introduced into the drain plate 201. The drain plate 201 is a conductive metal material with good conductivity and can effectively conduct current. The drain plate 201 is a conductive rectangular long plate with a long length. By extending the current path, the heat generation of the low-voltage pile head 102b is reduced. Specifically, the current enters the drain plate 201 from the wiring pile 102b-1 through the gasket 302, and then transmits along the length direction of the drain plate 201. The other end of the drain plate 201 is connected to the lead terminal 203 through the clamping groove 201a. The lead terminal 203 is used to connect the wire on the low voltage side to ensure that the current can be smoothly transmitted to the next electrical device.

[0061] In summary, the device reduces the heating of the low-voltage pile head 102b by extending the current path. The long-distance design of the drainage plate 201 disperses the heat during the current transmission process, avoids local overheating, and prolongs the service life of the equipment. The design of the support plate 202 and the support column 204 ensures the stable transmission of the current and reduces the potential safety hazards. The insulation performance of the support plate 202 prevents current leakage and improves the safety of the entire device. The design of the lead terminal 203 and the fixing member 304 ensures the firmness and reliability of the wire connection and reduces the failure caused by poor connection. The use of the fixing cap 203a and the first nut 303 further enhances the stability of the connection. The modular design of the drainage 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 is different from the first two embodiments in that: one end of the guide plate 201 is connected to the gasket 302 through the clamping groove 201a, and is fastened with a first nut 303;

[0064] The other end of the guide plate 201 is connected to the lead terminal 203 through the clamping groove 201a and fixed with a fixing cap 203a;

[0065] The docking plate 202a of the support plate 202 is docked with the clamping column 102c on the table 102, and fixed on the table 102 through the support column 204;

[0066] The guide plate 201 is fixedly overlapped on the U-shaped plate 202 b , and the wires are connected to the lead terminals 203 .

[0067] Furthermore, the guide plate 201 is a conductive metal material, used to guide the current of the terminal post 102b-1 to the lead terminal 203, and the support plate 202 is a non-conductive metal material, used to provide insulation support to prevent current leakage.

[0068] It should be noted that the base 100 is fixed to the line pole through the mounting plate 101; multiple groups of wiring terminals 102a and low-voltage pile heads 102b are installed on the table 102 of the base 100, wherein the end of the low-voltage pile head 102b is provided with a wiring pile 102b-1; the first pad cap 301 and the gasket 302 are sequentially sleeved on the wiring pile 102b-1; one end of the guide plate 201 is connected to the gasket 302 through the clamping groove 201a, and is fastened with a group of first nuts 303; the other end of the guide plate 201 is connected to the lead terminal 203 through the clamping groove 201a, and is fixed with the fixing cap 203 a fixed; docking the docking plate 202a of the support plate 202 with the clamping column 102c on the table 102, and fix it on the table 102 through the support column 204, wherein the support column 204 includes a bolt 204a connected to the table 102, a sleeve 204b sleeved on the outside of the bolt 204a, and a second nut 204c set through the upper end of the U-shaped plate 202b; fix the guide plate 201 to overlap the U-shaped plate 202b to ensure the stability and reliability of the guide plate 201; connect the wire on the low-voltage side to the lead terminal 203 to complete the installation and use of the entire device.

[0069] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A 10kV pole-mounted transformer low-voltage pile head high current protection device, characterized in that: It comprises a base (100), a mounting plate (101) arranged at the bottom thereof, a table (102) arranged at the end thereof, a plurality of groups of connection terminals (102a) arranged on the table (102), and a plurality of groups of low-voltage pile heads (102b) arranged on the other side of the table (102); A flow guide component (200) comprises a flow guide plate (201) clamped and arranged on one side of the low-pressure pile head (102b), a support plate (202) arranged at the bottom of the flow guide plate (201), and a lead terminal (203) arranged on one side of the flow guide plate (201); The guide plate (201) can guide the current of the low-voltage pile head (102b) to its end.

2. The 10kV pole-mounted transformer low-voltage pile head high current protection device according to claim 1, characterized in that: The table top (102) is provided with clamping columns (102c) on both sides thereof; The support plate (202) comprises a docking plate (202a) connected to the clamping column (102c), a U-shaped plate (202b) arranged on one side of the docking plate (202a), and a corner plate (202c) arranged at the bottom of the U-shaped plate (202b).

3. The 10kV pole-mounted transformer low-voltage pile head high current protection device as claimed in claim 2, characterized in that: The clamping column (102c) is in contact with and matched with the docking plate (202a); The support plate (202) is made of a non-conductive metal material, and a support column (204) is provided at the bottom of the support plate (202).

4. The 10kV pole-mounted transformer low-voltage pile head high current protection device as claimed in claim 3, characterized in that: The low-voltage pile head (102b) comprises a connection pile (102b-1) arranged at its end; The terminal post (102b-1) is sleeved with a first gasket cap (301), a gasket (302) is sleeved on the first gasket cap (301), the guide plate (201) is sleeved on the gasket (302), and a group of first nuts (303) are sleeved on the guide plate (201).

5. The 10kV pole-mounted transformer low-voltage pile head high current protection device as claimed in claim 4, characterized in that: The supporting column (204) comprises a bolt (204a) penetrating and connected to the table top (102), a sleeve (204b) sleeved on the outside of the bolt (204a), and a second nut (204c) penetrating and arranged on the upper end of the U-shaped plate (202b).

6. The 10kV pole-mounted transformer low-voltage pile head high current protection device as claimed in claim 5, characterized in that: The guide plate (201) is made of a conductive metal material and can guide the connection post (102b-1) thereto; The guide plate (201) is fixedly overlapped on the U-shaped plate (202b) via a fixing member (304); the U-shaped plate (202b) provides a supporting force for the guide plate (201).

7. The 10kV pole-mounted transformer low-voltage pile head high current protection device according to claim 6, characterized in that: The guide plate (201) comprises clamping grooves (201a) arranged at both side ends thereof; One of the clamping grooves (201a) is connected to the gasket (302), and the other of the clamping grooves (201a) is connected to the lead terminal (203).

8. The 10kV pole-mounted transformer low-voltage pile head high current protection device as claimed in claim 7, characterized in that: The lead terminal (203) comprises a fixing cap (203a) arranged inside the clamping groove (201a); The fixing cap (203a) fixes and connects the lead terminal (203).

9. A 10kV pole-mounted transformer low-voltage pile head high current protection method, characterized in that: The invention comprises the 10kV pole-mounted transformer low-voltage pile head high current protection device as described in any one of claims 1 to 9, and further comprises the following steps: One end of the guide plate (201) is connected to the gasket (302) through the clamping groove (201a), and is fastened with a first nut (303); The other end of the guide plate (201) is connected to the lead terminal (203) through the clamping groove (201a) and fixed with a fixing cap (203a); The docking plate (202a) of the support plate (202) is docked with the clamping column (102c) on the table top (102), and is fixed on the table top (102) via the supporting column (204); The guide plate (201) is fixedly overlapped on the U-shaped plate (202b), and the wires are connected to the lead terminals (203).

10. The 10kV pole-mounted transformer low-voltage pile head high current protection device according to claim 9, characterized in that: The guide plate (201) is made of a conductive metal material and is used to guide the current of the connection post (102b-1) to the lead terminal (203); the support plate (202) is made of a non-conductive metal material and is used to provide insulating support to prevent current leakage.

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