Moisture-proof sealed outdoor zero sequence mutual inductor

Abstract

The utility model relates to zero sequence mutual inductor technical field discloses a kind of outdoor zero sequence mutual inductor of damp-proof sealing, including lower plastic package and upper plastic package, lower plastic package and upper plastic package both sides are connected with the connecting frame being arranged, lower plastic package and upper plastic package are connected with the iron core being arranged in, lower plastic package top surface is equipped with mounting groove one, the upper plastic package bottom surface is equipped with mounting groove two, mounting groove one is connected with the setting of block component in.The utility model is equipped with mounting groove one and mounting groove two in the port of iron core, by the setting of block component and extruded rubber ring, the butt joint of iron core can be sealed, further utilize the one-way flow of gas of check valve, further utilize the sealing effect of air pressure, simultaneously by the setting of protection component, the sealing effect between lower plastic package and upper plastic package can be guaranteed, can further play the effect of dustproof and moistureproof, guarantee use effect and service life.

Description

Technical Field

[0001] This utility model relates to the field of zero-sequence current transformer technology, specifically a moisture-proof and sealed outdoor zero-sequence current transformer. Background Technology

[0002] A zero-sequence current transformer is a line fault current monitor. It is used in conjunction with relay protection devices or signals when a zero-sequence grounding current is generated in the power system, so as to make the device components operate and realize protection or monitoring. The split-type zero-sequence current transformer is an openable current transformer, which consists of two semi-ring iron cores. It can be opened and closed manually or automatically, and is convenient to be installed on the laid cables without interrupting power.

[0003] When used outdoors, condensation can easily form inside the casing when there is a large temperature difference between day and night, causing the iron core to rust. Moisture intrusion will oxidize the silicon steel sheets, reduce the magnetic permeability, and increase the measurement error. If the split iron core is deformed due to moisture expansion, the air gap will increase, affecting the sensitivity. This is even more serious in rainy weather. Therefore, a moisture-proof and sealed outdoor zero-sequence current transformer is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a moisture-proof and sealed outdoor zero-sequence current transformer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a lower sealing body and an upper sealing body. Connecting brackets are provided on both sides of the lower and upper sealing bodies. An iron core is connected to both the lower and upper sealing bodies. A mounting groove 1 is formed on the top surface of the lower sealing body, and a mounting groove 2 is formed on the bottom surface of the upper sealing body. A sealing component is connected to the first mounting groove, and a compression ring is connected to the inner side of the second mounting groove. Connecting grooves are formed at the top of the connecting brackets on both sides of the upper sealing body, and internally threaded pipes are connected to the top of the connecting grooves. A one-way valve is connected inside the internally threaded pipes. Protective components are connected to both sides of the lower and upper sealing bodies.

[0006] Preferably, the bottom end of the one-way valve extends into the connecting groove, an air inlet is provided between the bottom end of the connecting groove and the second mounting groove, and an airtight cap is connected to the top end of the internal threaded pipe.

[0007] Preferably, the sealing component includes an arc-shaped frame slidably disposed in the mounting groove, a rubber pad is connected to the top of the arc-shaped frame, top blocks are connected to both sides inside the arc-shaped frame, and elastic frames are connected to the bottom of the top blocks, with the elastic frames abutting against the bottom of the inner wall of the mounting groove.

[0008] Preferably, two guide strips are connected to the bottom of the inner wall of the mounting groove corresponding to the arc frame, and two positioning bolts are connected to one side of the lower plastic seal. One end of the positioning bolt extends through into the mounting groove and abuts against the arc frame.

[0009] Preferably, the protective component includes a snap-fit ​​frame, a sealing strip is connected to the inner side of the snap-fit ​​frame, a desiccant is disposed between the sealing strips, a threaded frame is threadedly connected to one side of the snap-fit ​​frame, and a push plate is connected to one end of the threaded frame.

[0010] Preferably, the threaded bracket has a hexagonal groove on one side, and the snap-type bracket has a groove on one side.

[0011] Preferably, each side of the connecting frame has a connecting hole, and the bottom of the lower plastic seal has a positioning threaded hole.

[0012] Preferably, the top of the connecting frame is provided with an internally threaded pipe corresponding to the connecting groove, and the one-way valve is connected to the internally threaded pipe.

[0013] Preferably, the first mounting slot and the second mounting slot have corresponding port positions for the iron core.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] By installing slot one and slot two at the port of the iron core, and by setting up sealing components and extrusion rings, the joint of the iron core can be sealed. Then, by using the one-way flow of gas through the one-way valve, the air pressure is further used to increase the sealing effect. At the same time, the setting of protective components can ensure the sealing effect between the lower and upper plastic seals, which can further play the role of dust and moisture prevention, ensuring the performance and service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a moisture-proof and sealed outdoor zero-sequence current transformer according to the present invention.

[0017] Figure 2 This is a side sectional view of a moisture-proof and sealed outdoor zero-sequence current transformer according to the present invention.

[0018] Figure 3 This is a schematic diagram of the exploded structure of a moisture-proof and sealed outdoor zero-sequence current transformer according to the present invention.

[0019] Figure 4 for Figure 3 Enlarged structural diagram of section A;

[0020] Figure 5 for Figure 2 Enlarged structural diagram of section B.

[0021] In the diagram: 1. Lower plastic seal; 2. Upper plastic seal; 3. Connecting frame; 4. Iron core; 5. Mounting slot one; 51. Guide strip; 6. Mounting slot two; 7. Sealing assembly; 71. Arc frame; 72. Rubber pad; 73. Top block; 74. Elastic frame; 8. Extrusion rubber ring; 9. Connecting slot; 10. Internal threaded pipe; 101. Airtight cap; 11. Protective assembly; 111. Clip-on frame; 112. Sealing strip; 113. Desiccant; 114. Threaded frame; 115. Push plate; 12. One-way valve; 222. Positioning bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: it includes a lower plastic seal 1 and an upper plastic seal 2. Connecting brackets 3 are connected to both sides of the lower plastic seal 1 and the upper plastic seal 2. Iron cores 4 are connected to both the lower plastic seal 1 and the upper plastic seal 2. The lower plastic seal 1, the upper plastic seal 2, the connecting brackets 3 and the iron cores 4 are common split-type zero-sequence current transformer components in the prior art. Since they are mature technologies, they are not described in detail in the specification. The top surface of the lower plastic seal 1 has an installation groove 5. The bottom surface of the upper plastic seal 2 has an installation groove 6. A sealing component 7 is connected to the first installation groove 5. An extrusion ring 8 is connected to the inner side of the second installation groove 6. The top of the connecting brackets 3 located on both sides of the upper plastic seal 2 has a connecting groove 9. The top of the connecting brackets 3 is connected to the connecting groove 9. An internal threaded pipe 10 is connected to the internal threaded pipe 10. A one-way valve 12 is connected to the internal threaded pipe 10. Protective components 11 are connected to both sides of the lower plastic seal 1 and the upper plastic seal 2.

[0024] Reference Figure 5 As shown, the bottom end of the one-way valve 12 extends into the connecting groove 9. An air inlet is provided between the bottom end of the connecting groove 9 and the second mounting groove 6. An airtight cap 101 is connected to the top end of the internal threaded pipe 10. The one-way valve 12 is a type of valve core. It can be connected to the internal threaded pipe 10 through an air pump. Air is pumped into the connecting groove 9 through the one-way valve 12, so that air enters the second mounting groove 6 through the air inlet and pushes the compression rubber ring 8 down, pressing it against the top of the rubber pad 72. The airtight cap 101 can effectively prevent air leakage.

[0025] Reference Figure 4As shown, the sealing assembly 7 includes an arc-shaped frame 71 that is slidably disposed in the mounting groove 5. A rubber pad 72 is connected to the top of the arc-shaped frame 71. Top blocks 73 are connected to both sides inside the arc-shaped frame 71. An elastic frame 74 is connected to the bottom of each top block 73. The elastic frame 74 abuts against the bottom of the inner wall of the mounting groove 5. When the lower plastic seal 1 and the upper plastic seal 2 are connected, the elastic frame 74 will push the top block 73 upward through its own elasticity, thus pushing the arc-shaped frame 71 to slide out of the mounting groove 5 and extend into the mounting groove 6. This can cover the iron core 4 exposed when the lower plastic seal 1 and the upper plastic seal 2 are connected, preventing it from contacting dust and also providing a certain degree of sealing.

[0026] Two guide strips 51 are connected to the bottom of the inner wall of the mounting groove 5 corresponding to the arc frame 71. Two positioning bolts 222 are connected to one side of the lower plastic seal 1. One end of the positioning bolt 222 extends through into the mounting groove 5 and abuts against the arc frame 71. When the arc frame 71 slides out of the mounting groove 5, the guide strips 51 can guide and enhance the sealing. When not installed, one end of the positioning bolt 222 will abut against one side of the arc frame 71, fixing the arc frame 71 in the mounting groove 5. After installation, tightening the positioning bolt 222 will lock one end into the bottom of the arc frame 71, which ensures the sealing and provides a positioning effect for the arc frame 71.

[0027] Reference Figure 3 As shown, the protective component 11 includes a snap-fit ​​bracket 111, with a sealing strip 112 connected to the inner side of the snap-fit ​​bracket 111. A desiccant 113 is placed between the sealing strips 112. A threaded bracket 114 is threadedly connected to one side of the snap-fit ​​bracket 111, and a push plate 115 is connected to one end of the threaded bracket 114. A hexagonal groove is formed on one side of the threaded bracket 114, and a groove is formed on one side of the snap-fit ​​bracket 111. After the lower plastic seal 1 and the upper plastic seal 2 are joined together, one end of each of the two protective components 11 is attached to the lower plastic seal. At the joint between the lower plastic seal 1 and the upper plastic seal 2, the threaded bracket 114 is rotated using a hex wrench, which pushes the push plate 115 inward, thereby fixing the buckle bracket 111 and the push plate 115 at the joint between the lower plastic seal 1 and the upper plastic seal 2. The inner sealing strip 112 ensures airtightness, and the desiccant 113 can absorb residual moisture inside to ensure dryness. During installation, the groove position is exactly at the positioning bolt 222, avoiding the positioning bolt 222 from affecting the position of the protective component 11 during installation.

[0028] Reference Figure 2As shown, each side of the connecting frame 3 has a connecting hole. The lower plastic seal 1 and the upper plastic seal 2 are fixed by bolt assembly through the connecting hole. The bottom end of the lower plastic seal 1 has a positioning threaded hole. The lower plastic seal 1 is fixed in a suitable position through the positioning threaded hole. The first mounting slot 5 and the second mounting slot 6 have corresponding port positions of the iron core 4. During the docking installation, the sealing assembly 7 in the first mounting slot 5 can be smoothly inserted into the second mounting slot 6.

[0029] The implementation principle of this application is as follows: When using this utility model, the lower plastic seal 1 and the upper plastic seal 2 are connected together. The connecting frame 3 is connected and installed through the connecting hole using a bolt assembly, thereby fixing the lower plastic seal 1 and the upper plastic seal 2. Then, the positioning bolt 222 is loosened, and the elastic frame 74 pushes the arc frame 71 upward through its own elasticity. Thus, the arc frame 71, with the rubber pad 72, extends into the second mounting groove 6 and fits against the extrusion rubber ring 8. Then, the positioning bolt 222 is tightened to fix the position of the arc frame 71. Air is then pumped into the second mounting groove 6 through the one-way valve 12 using an air pump, pushing the extrusion rubber ring 8 downward to fit more tightly against the rubber pad 72, ensuring a seal. This holds the docking end of the iron core 4. Then, the protective assembly 11 is adjusted using a hex wrench to seal the docking point of the lower plastic seal 1 and the upper plastic seal 2.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A moisture-proof and sealed outdoor zero-sequence current transformer, comprising a lower plastic seal (1) and an upper plastic seal (2), characterized in that: Connecting brackets (3) are provided on both sides of the lower plastic seal (1) and the upper plastic seal (2). Iron cores (4) are provided inside the lower plastic seal (1) and the upper plastic seal (2). A mounting groove (5) is provided on the top surface of the lower plastic seal (1). A mounting groove (6) is provided on the bottom surface of the upper plastic seal (2). A sealing component (7) is provided inside the mounting groove (5). An extrusion ring (8) is provided inside the mounting groove (6). A connecting groove (9) is provided at the top of the connecting brackets (3) on both sides of the upper plastic seal (2). A one-way valve (12) is provided inside the connecting groove (9). A protective component (11) is provided on both sides of the lower plastic seal (1) and the upper plastic seal (2). The top of the connecting frame (3) is connected to the connecting groove (9) and an internal threaded pipe (10) is provided. The one-way valve (12) is connected to the internal threaded pipe (10).

2. The moisture-proof and sealed outdoor zero-sequence current transformer according to claim 1, characterized in that: The bottom end of the one-way valve (12) extends into the connecting groove (9), and an air inlet is provided between the bottom end of the connecting groove (9) and the second mounting groove (6). An airtight cap (101) is connected to the top end of the internal threaded pipe (10).

3. The moisture-proof and sealed outdoor zero-sequence current transformer according to claim 1, characterized in that: The sealing assembly (7) includes an arc-shaped frame (71) that is slidably disposed in the mounting groove (5). A rubber pad (72) is connected to the top of the arc-shaped frame (71). Top blocks (73) are connected to both sides inside the arc-shaped frame (71). An elastic frame (74) is connected to the bottom of the top block (73). The elastic frame (74) abuts against the bottom of the inner wall of the mounting groove (5).

4. The moisture-proof and sealed outdoor zero-sequence current transformer according to claim 3, characterized in that: Two guide strips (51) are connected to the bottom of the inner wall of the mounting groove (5) corresponding to the arc frame (71). Two positioning bolts (222) are connected to one side of the lower plastic seal (1). One end of the positioning bolt (222) extends through into the mounting groove (5) and abuts against the arc frame (71).

5. A moisture-proof and sealed outdoor zero-sequence current transformer according to claim 1, characterized in that: The protective component (11) includes a snap-fit ​​frame (111), a sealing strip (112) is connected to the inner side of the snap-fit ​​frame (111), a desiccant (113) is provided between the sealing strips (112), a threaded frame (114) is threadedly connected to one side of the snap-fit ​​frame (111), and a push plate (115) is connected to one end of the threaded frame (114).

6. A moisture-proof and sealed outdoor zero-sequence current transformer according to claim 5, characterized in that: The threaded bracket (114) has a hexagonal groove on one side, and the snap-type bracket (111) has a groove on one side.

7. A moisture-proof and sealed outdoor zero-sequence current transformer according to claim 1, characterized in that: The connecting frame (3) has a connecting hole on one side, and the lower plastic seal (1) has a positioning threaded hole at the bottom.

8. A moisture-proof and sealed outdoor zero-sequence current transformer according to claim 1, characterized in that: The first mounting slot (5) and the second mounting slot (6) have corresponding port positions for the iron core (4).

Images