A moisture-proof sealed structure of a mutual inductor housing

Abstract

The utility model provides a mutual -inductor shell of dampproof sealing structure, belong to mutual -inductor technical field, including the shell of iron core winding surface setting, the shell includes one in front positive half shell and one in back back half shell, the first cavity is arranged in the shell arm of positive half shell, the second cavity is arranged in the shell arm of back half shell, the second cavity is linked together with the first cavity, one side of positive half shell upper portion is provided with the inflation interface, the connecting seam department of positive half shell and back half shell is provided with the sealing strip of fusion, the utility model discloses through the sealing adaptation of inner insertion ring and inner insertion slot, the sealing adaptation of outer insertion slot and outer insertion ring, and then make the shell body to wrap up the iron core winding, again through the sealing strip and back half shell's connecting gap of positive half shell are reinforced sealing, and then open the plug and fill into the inert gas in the first cavity and the second cavity inside, carry out dampproof protection to the shell arm of shell body through the inert gas, thereby eliminate the source of humidity, reduce the probability that humidity seeps into the shell from the shell arm.

Description

Technical Field

[0001] This utility model relates to the field of instrument transformer technology, specifically to an instrument transformer housing with a moisture-proof and sealed structure. Background Technology

[0002] Current transformers are sensors that enable secondary equipment such as measuring instruments and relay protection devices in power systems to obtain primary circuit current information. They are important electrical devices in power systems, undertaking the functions of isolation between high and low voltage systems and conversion of high voltage quantities to low voltage quantities. The proper functioning of current transformers is of paramount importance to the safety of power systems and the normal operation of protection and measurement equipment.

[0003] In related technologies, existing current transformers are directly connected to wires, and the only way to prevent moisture is to wrap the surface of the iron core winding with moisture-proof insulating paper. The insulating and moisture-proof paper reduces the impact of moisture on the iron core winding. However, this method of moisture prevention is relatively simple and the structure is simple. The outer shell of the transformer is difficult to prevent moisture, which increases the probability of the current transformer getting damp. To solve the above problems, a moisture-proof and sealed transformer shell is proposed to solve the above problems. Utility Model Content

[0004] In view of this, the present invention provides a current transformer housing with a moisture-proof and sealed structure. The present invention uses an inner insert ring and an inner slot for sealing and fitting, and an outer slot and an outer insert ring for sealing and fitting, so that the housing encloses the iron core winding. Then, a sealing strip is used to reinforce and seal the connection gap between the positive half-shell and the back half-shell. Then, the plug is opened to fill the first cavity and the second cavity with inert gas. The inert gas is used to protect the shell arm of the housing from moisture, thereby eliminating the source of moisture and reducing the probability of moisture seeping into the housing from the shell arm.

[0005] To solve the above-mentioned technical problems, this utility model provides a current transformer housing with a moisture-proof and sealed structure, including a housing disposed on the surface of the iron core winding. The housing includes a front half-shell located on the front and a back half-shell located on the rear. The front half-shell and the back half-shell are fitted together. A first cavity is provided in the shell arm of the front half-shell, and a second cavity is provided in the shell arm of the back half-shell. The second cavity is connected to the first cavity. An air inlet is provided on one side of the upper part of the front half-shell, and the air inlet is connected to the first cavity. A sealing strip is fused at the joint between the front half-shell and the back half-shell.

[0006] The first and second cavities are filled with inert gas, which can be nitrogen or argon.

[0007] The inflation port has a removable plug, which is a threaded sealing plug, and a sealing gasket is pressed onto the inner ring of the plug.

[0008] An inner insert ring is provided on the inner ring of the front half shell. The inner insert ring is used to fit with the inner slot, so that the inner rings of the front half shell and the back half shell are sealed together. An inner slot is provided on the inner ring of the back half shell, and the inner insert ring fits with the inner slot in a sealed fit.

[0009] An outer insert ring is provided on the outer ring of the back half shell. The outer insert ring is used to fit with the outer slot, so that the outer ring of the front half shell and the back half shell are sealed together. An outer slot is provided on the outer ring of the front half shell. The outer insert ring fits with the outer slot in a sealed manner. Multiple connecting holes are provided at the bottom of the outer insert ring and the outer slot. The connecting holes are used to connect the first cavity and the second cavity. One end of the connecting hole passes through the outer insert ring and connects with the second cavity. The other end of the connecting hole passes through the outer slot and connects with the first cavity.

[0010] The bottom of the positive half-shell has a wire-passing port, and the bottom of the back half-shell has a wire-passing port. The external wire of the iron core winding is inserted through the wire-passing port. One wire-passing port passes through the first cavity and communicates with the outside of the positive half-shell, and the other wire-passing port passes through the second cavity and communicates with the outside of the back half-shell. A sealing cylinder is provided where the wire-passing port passes through the first cavity. The sealing cylinder is used to install the sealing sleeve and fix the sealing sleeve. A sealing cylinder is provided where the wire-passing port passes through the second cavity.

[0011] Each sealing cylinder is equipped with a sealing sleeve, which is used to clamp and fix the external cable of the iron core winding. Each sealing sleeve has a sealing joint on the side away from the outer shell. The sealing joint is made of insulating material and is detachably threaded to the sealing sleeve.

[0012] A positioning block is provided on each side of the bottom of the front half shell. The positioning block is used to connect the groove to the front half shell. Each positioning block has a groove to receive the protrusion. The positioning block has a pair of screw holes running from top to bottom. A limiting block is provided on each side of the bottom of the back half shell. The limiting block is used to connect the protrusion to the back half shell. Each limiting block has a protrusion that is adapted to the groove. The protrusion is used to insert into the groove. Each protrusion has a pair of screw holes. By inserting the protrusion into the groove, the positioning block and the limiting block are fitted together, so that the screw holes correspond. Then, the combined outer shell can be fixed in the electrical cabinet by connecting bolts.

[0013] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. By sealing and adapting the inner insert ring to the inner slot and the outer slot to the outer insert ring, the shell can wrap around the iron core winding. Then, the sealing strip reinforces and seals the connection gap between the front half shell and the back half shell. Then, the plug is opened to fill the first cavity and the second cavity with inert gas. The inert gas is used to protect the shell arms from moisture, thereby eliminating the source of moisture and reducing the probability of moisture seeping into the shell from the shell arms.

[0014] 2. The bottom of the outer ring and the outer slot is provided with multiple connecting holes. The two connecting holes on the coaxial axis correspond to each other. The connecting holes are used to connect the first cavity with the second cavity.

[0015] 3. By inserting the protrusion into the groove, the positioning block and the limiting block are made to fit together, so that the screw holes correspond. Then, by connecting bolts, the combined shell can be fixed in the electrical cabinet. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side sectional view of the present invention; Figure 3 This utility model Figure 2 A magnified view of part A; Figure 4 This utility model Figure 2 A magnified view of part B; Figure 5 This utility model Figure 2 A magnified view of part C; Figure 6 This is a side sectional view of the present invention; Figure 7 This utility model Figure 6 A magnified view of part D; Figure 8 This is a front sectional view of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 100, outer shell; 101, front half shell; 102, back half shell; 103, sealing strip; 200, first cavity; 201, inner insert ring; 202, outer slot; 203, connecting hole; 204, wire through port; 205, sealing cylinder; 206, sealing sleeve; 207, sealing joint; 300, second cavity; 301, inner slot; 302, outer insert ring; 400, inflation port; 401, plug; 500, positioning block; 501, groove; 502, limiting block; 503, protrusion; 504, screw hole. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-8 The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0019] like Figure 1-8 As shown: This embodiment provides a current transformer housing with a moisture-proof and sealed structure, including a housing 100 disposed on the surface of the iron core winding. The housing 100 includes a front half-shell 101 located on the front and a back half-shell 102 located on the rear. The front half-shell 101 and the back half-shell 102 are fitted together. A first cavity 200 is disposed in the housing arm of the front half-shell 101, and a second cavity 300 is disposed in the housing arm of the back half-shell 102. The second cavity 300 is connected to the first cavity 200. An air inlet 400 is disposed on one side of the upper part of the front half-shell 101, and the air inlet 400 is connected to the first cavity 200. A sealing strip 103 is fused to the joint between the front half-shell 101 and the back half-shell 102.

[0020] In use, the inner insert ring 201 is sealed and adapted to the inner slot 301, and the outer slot 202 is sealed and adapted to the outer insert ring 302, thereby allowing the shell to wrap around the iron core winding. Then, the sealing strip 103 reinforces and seals the connection gap between the front half shell 101 and the back half shell 102. Then, the plug 401 is opened to fill the first cavity 200 and the second cavity 300 with inert gas. The inert gas is used to protect the shell arm of the shell from moisture, thereby eliminating the source of moisture and reducing the probability of moisture seeping into the shell from the shell arm.

[0021] This embodiment provides a current transformer housing with a moisture-proof and sealed structure. like Figure 2 , 6 As shown in Figure 7: The first cavity 200 and the second cavity 300 are filled with inert gas, which can be nitrogen or argon. A plug 401 is detachably provided in the gas filling port 400. The plug 401 is a threaded sealing plug 401. A sealing gasket is pressed onto the inner ring of the plug 401. A knob is provided at the end of the plug 401 away from the gas filling port 400 to facilitate opening the plug 401.

[0022] like Figure 2 , 4 As shown in Figure 5: An inner insert ring 201 is provided on the inner ring of the positive half shell 101. The inner insert ring 201 is thermally connected to the positive half shell 101. The inner insert ring 201 is used to fit with the inner slot 301, thereby sealing the inner rings of the positive half shell 101 and the back half shell 102. An inner slot 301 is provided on the inner ring of the back half shell 102. The inner insert ring 201 and the inner slot 301 are sealed and fitted together.

[0023] like Figure 2 , 4As shown in Figure 5: An outer insertion ring 302 is provided on the outer ring of the back half shell 102. The outer insertion ring 302 is thermally connected to the back half shell 102. The outer insertion ring 302 is used to fit with the outer slot 202, thereby sealing the outer ring of the front half shell 101 and the back half shell 102. An outer slot 202 is provided on the outer ring of the front half shell 101. The outer insertion ring 302 and the outer slot 202 are sealed and fitted. Multiple connecting holes 203 are provided at the bottom of the outer insertion ring 302 and the outer slot 202. Two connecting holes 203 on the same axis correspond to each other. The connecting holes 203 are used to connect the first cavity 200 and the second cavity 300. One end of the connecting hole 203 passes through the outer insertion ring 302 and connects with the second cavity 300. The other end of the connecting hole 203 passes through the outer slot 202 and connects with the first cavity 200.

[0024] like Figure 1 , 2 As shown in Figure 3: The bottom of the positive half-shell 101 is provided with a wire-passing port 204, and the bottom of the back half-shell 102 is provided with a wire-passing port 204. The external wire of the iron core winding is inserted through the wire-passing port 204. One wire-passing port 204 passes through the first cavity 200 and communicates with the outside of the positive half-shell 101. The other wire-passing port 204 passes through the second cavity 300 and communicates with the outside of the back half-shell 102. A sealing cylinder 205 is provided where the wire-passing port 204 passes through the first cavity 200. The sealing cylinder 205 is used to install the sealing sleeve 206. The sealing sleeve 206 and the sealing cylinder 205 are heat-sealed to fix the sealing sleeve 206. The sealing cylinder 205 is provided where the wire-passing port 204 passes through the second cavity 300.

[0025] like Figure 2 , 3 As shown: Each sealing cylinder 205 is provided with a sealing sleeve 206. The sealing sleeve 206 is used to clamp and fix the external cable of the iron core winding. Each sealing sleeve 206 is provided with a sealing connector 207 on the side away from the outer shell 100. The sealing connector 207 is made of insulating material and is detachably threaded to the sealing sleeve 206.

[0026] like Figure 1 , 8As shown: A positioning block 500 is provided on each side of the bottom of the front half-shell 101. The positioning block 500 is used to connect the groove 501 to the front half-shell 101. Each positioning block 500 has a groove 501 inside, which is used to receive the protrusion 503. A pair of screw holes 504 are provided through the positioning block 500 from top to bottom. A limiting block 502 is provided on each side of the bottom of the back half-shell 102. The limiting block 502 is used to connect the protrusion 503 to the back half-shell 101. The 02 are connected, and each limiting block 502 is provided with a protrusion 503 that is adapted to the groove 501. The protrusion 503 is used to insert into the groove 501. Each protrusion 503 is provided with a pair of screw holes 504. By inserting the protrusion 503 into the groove 501, the positioning block 500 and the limiting block 502 are fitted together, so that the screw holes 504 correspond to each other. Then, by connecting bolts, the combined outer shell 100 can be fixed in the electrical cabinet.

[0027] Working principle: After the iron core winding is placed into the positive half shell 101, it is sealed and adapted to the inner slot 301 through the inner insertion ring 201, and sealed and adapted to the outer slot 202 through the outer insertion ring 302, so that the shell covers the iron core winding. Then, the sealing strip 103 reinforces and seals the connection gap between the positive half shell 101 and the back half shell 102. Then, the plug 401 is opened to fill the first cavity 200 and the second cavity 300 with inert gas. The inert gas is used to protect the shell arm of the shell from moisture, thereby eliminating the source of moisture and reducing the probability of moisture seeping into the shell from the shell arm.

[0028] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A current transformer housing with a moisture-proof and sealed structure, comprising a housing (100) disposed on the surface of the iron core winding, characterized in that: The outer shell (100) includes a front half-shell (101) located on the front and a back half-shell (102) located on the rear. The front half-shell (101) and the back half-shell (102) are fitted together. A first cavity (200) is provided in the shell arm of the front half-shell (101), and a second cavity (300) is provided in the shell arm of the back half-shell (102). The second cavity (300) is connected to the first cavity (200). An inflation port (400) is provided on one side of the upper part of the front half-shell (101). The inflation port (400) is connected to the first cavity (200). A sealing strip (103) is fused to the joint between the front half-shell (101) and the back half-shell (102).

2. The current transformer housing with a moisture-proof and sealed structure as described in claim 1, characterized in that: The first cavity (200) and the second cavity (300) are filled with inert gas.

3. The current transformer housing with a moisture-proof and sealed structure as described in claim 2, characterized in that: The inflation port (400) is detachably equipped with a plug (401).

4. The current transformer housing with a moisture-proof and sealed structure as described in claim 3, characterized in that: An inner insert ring (201) is provided on the inner ring of the positive half shell (101), and an inner slot (301) is provided on the inner ring of the back half shell (102). The inner insert ring (201) and the inner slot (301) are sealed and adapted.

5. The current transformer housing with a moisture-proof and sealed structure as described in claim 4, characterized in that: An outer insert ring (302) is provided on the outer ring of the back half shell (102), and an outer slot (202) is provided on the outer ring of the front half shell (101). The outer insert ring (302) and the outer slot (202) are sealed and adapted. Multiple connecting holes (203) are provided at the bottom of the outer insert ring (302) and the outer slot (202). One end of the connecting hole (203) passes through the outer insert ring (302) and communicates with the second cavity (300). The other end of the connecting hole (203) passes through the outer slot (202) and communicates with the first cavity (200).

6. The current transformer housing with a moisture-proof and sealed structure as described in claim 5, characterized in that: The bottom of the front half shell (101) is provided with a wire-passing port (204), and the bottom of the back half shell (102) is provided with the wire-passing port (204). One of the wire-passing ports (204) passes through the first cavity (200) and communicates with the outside of the front half shell (101). The other wire-passing port (204) passes through the second cavity (300) and communicates with the outside of the back half shell (102). A sealing cylinder (205) is provided where the wire-passing port (204) passes through the first cavity (200), and a sealing cylinder (205) is provided where the wire-passing port (204) passes through the second cavity (300).

7. The current transformer housing with a moisture-proof and sealed structure as described in claim 6, characterized in that: Each of the sealing cylinders (205) is provided with a sealing sleeve (206), and each of the sealing sleeves (206) is provided with a sealing joint (207) on the side away from the outer shell (100).

8. The current transformer housing with a moisture-proof and sealed structure as described in claim 7, characterized in that: A positioning block (500) is provided on each side of the bottom of the front half shell (101). Each positioning block (500) has a groove (501) and a pair of screw holes (504) running from top to bottom. A limiting block (502) is provided on each side of the bottom of the back half shell (102). Each limiting block (502) has a protrusion (503) that is adapted to the groove (501) and a pair of screw holes (504) on each protrusion (503).

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