CN210223764U - Oil-immersed current transformer - Google Patents
Oil-immersed current transformer Download PDFInfo
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- CN210223764U CN210223764U CN201920766275.4U CN201920766275U CN210223764U CN 210223764 U CN210223764 U CN 210223764U CN 201920766275 U CN201920766275 U CN 201920766275U CN 210223764 U CN210223764 U CN 210223764U
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Abstract
An oil immersed current transformer comprises an expander, a transformer body, a combined porcelain bushing and an oil tank, wherein the combined porcelain bushing and the oil tank are filled with insulating oil; the body is arranged in the combined porcelain bushing, one end of the combined porcelain bushing is connected with the expander, and the other end of the combined porcelain bushing is connected with the oil tank; two sides of the combined porcelain bushing are respectively provided with a primary terminal, and the oil tank is provided with a secondary junction box; the combined porcelain bushing comprises a cylindrical first porcelain bushing structure at the upper part and a second porcelain bushing structure with the wavy outer surface at the lower part, the upper end of the first porcelain bushing structure is fixedly connected with the expander, the lower end of the second porcelain bushing structure is fixedly connected with the oil tank, the first porcelain bushing structure and the second porcelain bushing structure are integrally formed, and the diameter of the first porcelain bushing structure is larger than that of the second porcelain bushing structure; the conducting rod of each primary terminal passes through the combined porcelain bushing to be connected with the transformer body. The utility model discloses oil-immersed current transformer, the product volume reduces, is favorable to the general standardization of product part, reduces materials such as insulating oil simultaneously, has effectively reduced product cost.
Description
Technical Field
The utility model relates to an oily formula current transformer, in particular to just founding formula current transformer is soaked to oily.
Background
The circuit transformer is an electrical equipment for isolating high voltage, converting large current into small current and measuring or protecting system.
At present, the 35kV oil immersion vertical current transformer comprises an expander, a metal oil conservator, a small porcelain bushing, a primary terminal, an oil tank and other main parts. When the product is installed, a primary terminal P1 end is electrically isolated by adopting a small porcelain bushing and an insulating ring, the same secondary winding nut is fixed on the left side of the oil conservator, and the same secondary winding nut at a primary terminal P2 end is fixed on the right side of the oil conservator. And the conductive rod of the primary terminal and the primary conductor of the transformer body are fixedly connected in a conductive manner by adopting double nuts. The expander adopts clamping ring, bolt fastening on storing up oil tank, stores up oil tank and adopts the bolt fastening at the insulator upper end, and the insulator lower extreme is placed at the case that oils that contains the secondary terminal box, goes up the oil tank and passes through the bolt fastening together with the lower oil tank that contains the installation base.
The existing oil-immersed current transformer is large in size, conductive circuits are easy to loosen, the reliability of products is poor, the cost is relatively high, and the defects are that:
1. the primary terminals are assembled on two sides of the metal oil conservator and placed at the upper end of the porcelain sleeve, so that parts such as the metal oil conservator, the small porcelain sleeve and the insulating ring and the cost of the parts are increased, and the material cost of the primary conductor, the transformer oil, the packing box and the like is correspondingly increased.
2. The primary terminal and the primary conductor of the transformer body are easy to loosen when in conductive connection by adopting a right-handed double nut, and the phenomena of local heating and overhigh temperature rise are generated during operation.
3. A common hinge is welded on the secondary junction box cover, a sealing gap is adjusted by a unilateral fastening nut, the left side and the right side cannot be balanced and adjusted, and the dustproof and waterproof effects are poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a simple structure is compact, and wire line connection is reliable stable, oil-immersed current transformer with low costs.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an oil immersed current transformer comprises an expander 1, a transformer body 5, a combined porcelain bushing 6 and an oil tank, wherein the combined porcelain bushing is filled with insulating oil; the body 5 is arranged inside the combined porcelain bushing 6, one end of the combined porcelain bushing 6 is connected with the expander 1, and the other end of the combined porcelain bushing is connected with the oil tank; two sides of the combined porcelain bushing 6 are respectively provided with a primary terminal 2, and the oil tank is provided with a secondary junction box 7; the combined porcelain bushing 6 comprises a cylindrical first porcelain bushing structure 61 at the upper part and a second porcelain bushing structure 62 with a wavy outer surface at the lower part, the upper end of the first porcelain bushing structure 61 is fixedly connected with the expander 1, the lower end of the second porcelain bushing structure 62 is fixedly connected with the oil tank, the first porcelain bushing structure 61 and the second porcelain bushing structure 62 are integrally formed, and the diameter of the first porcelain bushing structure 61 is larger than that of the second porcelain bushing structure 62; the conducting rod of each primary terminal 2 passes through the combined porcelain bushing 6 to be connected with the transformer body 5.
Further, the conducting rod of each primary terminal 2 is connected with the conducting strip 51 of the transformer body 5 through two right-handed locking nuts 3 and one left-handed locking nut 4, and the conducting strip 51 of the transformer body 5 extends into the first porcelain bushing structure 61; two right-handed locknuts 3 are respectively positioned at two sides of the conducting strip 51, and one left-handed locknut 4 is positioned at one side of the right-handed locknut 3 close to the center of the body 5.
Further, be equipped with on the combination formula insulator 6 with the first mounting hole 601 of the conducting rod installation of primary terminal 2, be equipped with on the conducting strip 51 with the conducting rod installation complex second mounting hole 511 of primary terminal 2, be equipped with two dextrorotation lock nuts 3 and a levogyration lock nut 4 on the conducting rod of primary terminal 2 and install complex dextrorotation screw thread and levogyration screw thread respectively.
Furthermore, one end of the combined porcelain bushing 6 is fixedly connected with the expander 1 through a first sealing ring, a first pressing ring and a first fastener; the first sealing ring is positioned at the joint of the combined porcelain bushing 6 and the expander 1, the first pressing ring is tightly attached to the first sealing ring, and the first fastener penetrates through the joint of the combined porcelain bushing 6 and the expander 1, the first sealing ring and the first pressing ring to fixedly connect the combined porcelain bushing 6 and the expander 1.
Further, the other end of the combined porcelain bushing 6 is fixedly connected with the oil tank through a second sealing ring, a second pressing ring and a second fastener; the second sealing ring is positioned at the joint of the combined porcelain bushing 6 and the oil tank, the second pressing ring is tightly attached to the second sealing ring, and the second fastener penetrates through the joint of the combined porcelain bushing 6 and the oil tank, the second sealing ring and the second pressing ring to fixedly connect the combined porcelain bushing 6 and the oil tank.
Further, the oil tank includes upper oil tank 9, lower oil tank 10 and is used for installing installation base 11 of oil tank 10 down, and upper oil tank 9 and lower oil tank 10 pass through third sealing washer and third fastener fixed connection, secondary terminal box 7 is installed in the lateral wall of upper oil tank 9.
Further, a product label 13 for identifying product information is mounted on an outer side wall of the secondary junction box 7.
Further, two sides of the secondary junction box 7 are respectively fixed on the oil tank through an adjustable hinge 8 and a fastening nut 12.
Further, the outer side wall of the expander 1 is provided with a display device 102 for displaying the position of the insulating oil surface.
The utility model discloses an oil-immersed current transformer, including expander, ware body, the combination formula insulator and the oil tank that the inside is full of insulating oil, adopt the combination formula insulator of the integral type that has the oil conservator function, the cylindrical first insulator structure on combination formula insulator upper portion is the profile modeling structure of oil conservator, does not have the umbellate arris of wave shape, has once to be qualified for the next round of competitions the effect and good heat dissipation effect; the appearance of lower part has the second insulator structure of wave umbellate form, and the both sides of combination formula insulator are located respectively to two primary terminals, reduce parts such as oil conservator, little insulator, insulating part, and the product volume reduces, is favorable to the general standardization of product part, reduces materials such as insulating oil simultaneously, has effectively reduced product cost.
Furthermore, the utility model discloses the conducting rod of the primary terminal of combination formula insulator both sides is connected through the reliable electric conduction of two dextrorotation lock nut and a levogyration lock nut and ware body, effectively stops not hard up production primary contact resistance grow, appears the phenomenon that local heating, temperature rise are too high during the operation. The two sides of the secondary junction box are fixed on the oil tank through the adjustable hinges and the fastening nuts respectively, the sealing gaps of the secondary junction box are adjusted in a balanced mode through the adjustable hinges and the fastening nuts on the two sides, the IP protection level of a product is improved, and the safety and reliability of the product are enhanced.
Drawings
Fig. 1 is a left side sectional view of the whole structure of the oil immersed current transformer;
fig. 2 is a schematic structural view of another position of the oil-immersed current transformer of the present invention.
Detailed Description
The following describes a specific embodiment of the oil-immersed current transformer according to the present invention with reference to the embodiments shown in fig. 1 to 2. The utility model discloses an oily formula current transformer is not limited to the description of following embodiment.
As shown in fig. 1-2, the oil-immersed current transformer of the present invention comprises an expander 1, a transformer body 5, a combined porcelain bushing 6 filled with insulating oil inside, and an oil tank. The body 5 is arranged inside the combined porcelain bushing 6, one end of the combined porcelain bushing 6 is connected with the expander 1, and the other end of the combined porcelain bushing is connected with the oil tank; two sides of the combined porcelain bushing 6 are respectively provided with a primary terminal 2, and the oil tank is provided with a secondary junction box 7; the conducting rod of each primary terminal 2 passes through the combined porcelain bushing 6 to be connected with the body 5. The combined porcelain bushing 6 comprises a first cylindrical porcelain bushing structure 61 on the upper portion and a second wavy porcelain bushing structure 62 on the lower portion, the upper end of the first porcelain bushing structure 61 is fixedly connected with the expander 1, the lower end of the second porcelain bushing structure 62 is fixedly connected with the oil tank, the first porcelain bushing structure 61 and the second porcelain bushing structure 62 are integrally formed, and the diameter of the first porcelain bushing structure 61 is larger than that of the second porcelain bushing structure 62.
The utility model discloses oil-immersed current transformer, including the expander, the ware body, inside combination formula insulator and the oil tank that is full of insulating oil, the combination formula insulator that adopts the integral type that has the oil conservator function, the both sides of combination formula insulator are located respectively to two terminals, the first porcelain bushing structure of columniform on combination formula insulator upper portion is the profile modeling structure of oil conservator, the umbrella arris of no wave shape, have once play line effect and good radiating effect, reduce the oil conservator, little insulator, parts such as insulating part, the product volume reduces, be favorable to the general standardization of product part, reduce materials such as insulating oil simultaneously, the product cost has effectively been reduced.
It should be noted that the diameter of the second porcelain bushing structure of the present application is small, there is not enough space for the mutual inductor to be connected with the same secondary terminal, but the first porcelain bushing structure on the upper portion is a profiling structure of an oil conservator, and is suitable for heat dissipation and primary wire outgoing of a vertical oil-immersed current transformer of 35kV or below, and a primary conductor passes through the porcelain bushing of the mutual inductor, so that the center of gravity is low, and the structural stability is good.
As shown in fig. 1, the utility model discloses oil-immersed current transformer's oil tank plays mutual-inductor support and secondary outlet effect, including last oil tank 9, lower oil tank 10 and the installation base 11 that is used for installing oil tank 10 down, go up oil tank 9 and lower oil tank 10 and pass through third sealing washer and third fastener fixed connection, secondary terminal box 7 is installed in the lateral wall of last oil tank 9. The utility model discloses oil-immersed current transformer's oil tank, last oil tank 9 and lower oil tank 10 pass through third sealing washer and third fastener fixed connection, and stable in structure is reliable. Specifically, two sides of the secondary junction box 7 are fixed on the oil tank through the adjustable hinges 8 and the fastening nuts 12 respectively, the sealing gaps of the secondary junction box 7 are adjusted in a left-right balance mode through the adjustable hinges 8 and the fastening nuts 12 on the two sides of the secondary junction box 7 respectively, the IP protection level of a product is improved, and the safety and reliability of the product are enhanced. Preferably, the utility model discloses oil-immersed current transformer's oil tank can adopt stamping forming's steel, and the rewelding is accomplished, and the cost is lower. The aluminum alloy fuel tank is preferable, and has the characteristics of simple processing technology, good corrosion resistance, good surface smoothness, high mechanical strength and light weight, and the cost is higher.
As shown in fig. 1, the utility model discloses oil-immersed current transformer, two primary terminals 2 establish ties in high tension transmission line, and a primary terminal P1 connects in the incoming line side, and another primary terminal P2 connects in the outgoing line side. The conducting rod of each primary terminal 2 is connected with the conducting strip 51 of the transformer body 5 through two right-handed locking nuts 3 and one left-handed locking nut 4; two right-handed locknuts 3 are respectively positioned at two sides of the conducting strip 51, and one left-handed locknut 4 is positioned at one side of the right-handed locknut 3 close to the center of the body 5. Specifically, the combined porcelain bushing 6 is provided with a first mounting hole 601 mounted with the conducting rod of the primary terminal 2, the conducting strip 51 is provided with a second mounting hole 511 mounted and matched with the conducting rod of the primary terminal 2, and the conducting rod of the primary terminal 2 is provided with two right-handed threads and one left-handed thread, wherein the two right-handed threads and the left-handed thread are respectively mounted and matched with the right-handed thread and the left-handed thread, and the two right-handed threads and the left-handed thread are respectively mounted and. During installation, the primary terminals P1 and P2 extend into the first installation hole 601 and are fixed on two sides of the porcelain bushing by the right-handed locking nuts 3 respectively, and the conducting strips 51 of the primary conductor penetrate through the conducting rods of the primary terminals P1 and P2 respectively and are fixed by the right-handed fastening nuts and the left-handed locking nuts respectively to complete primary conducting connection. The utility model discloses the conducting rod of the primary terminal of combination formula insulator both sides is through two dextrorotation lock nut 3 and a levogyration lock nut 4 and the reliable electrically conductive connection of conducting strip 51 of ware body 5, effectively stops not hard up production primary contact resistance grow, the phenomenon that local heating, temperature rise were too high appears in the operation.
As shown in fig. 2, the combined porcelain bushing of the utility model has a simple and compact structure. The utility model discloses combination formula insulator 6 is the profile modeling structure for containing the oil conservator function, its inside transformer oil that is full of and has insulating properties, first insulator structure 61 of columniform on upper portion and the outward appearance of lower part are corrugated second insulator structure 62, first insulator structure 61 on upper portion is concentric reducing no umbrella arris formula insulator sleeve 61 promptly, second insulator structure 62 is cylindrical many arris formula insulator, the upper end and the 1 fixed connection of expander of first insulator structure 61, the lower extreme and the oil tank fixed connection of second insulator structure 62, first insulator structure 61 and 62 integrated into one piece of second insulator structure, the diameter of first insulator structure 61 is greater than the diameter of second insulator structure 62, the conducting strip 51 of ware body 5 stretches in first insulator structure 61. The utility model discloses the simple structure of combination formula insulator is compact, be favorable to reducing the volume of product, relies on the insulating nature of combination formula insulator itself, need not to increase extra insulating part between terminal and combination formula insulator once, and simple to operate is swift. The combined porcelain bushing 6 is of an integral copying structure, the first porcelain bushing structure 61 and the second porcelain bushing structure 62 are formed by blank forming and integral sintering, the first mounting hole 601 required by the primary terminal 2 is machined and initially assembled on a semi-finished product, and the production process is simple and reliable.
As shown in figure 1, the utility model discloses the connection structure of combination formula insulator and expander and upper oil tank is reliable stable. One end of the combined porcelain bushing 6 is fixedly connected with the expander 1 through a first sealing ring, a first pressing ring and a first fastener; the first sealing ring is positioned at the joint of the combined porcelain bushing 6 and the expander 1, the first pressing ring is tightly attached to the first sealing ring, and the first fastener penetrates through the joint of the combined porcelain bushing 6 and the expander 1, the first sealing ring and the first pressing ring to fixedly connect the combined porcelain bushing 6 and the expander 1. The other end of the combined porcelain bushing 6 of the utility model is fixedly connected with the oil tank through a second sealing ring, a second pressing ring and a second fastener; the second sealing ring is positioned at the joint of the combined porcelain bushing 6 and the oil tank, the second pressing ring is tightly attached to the second sealing ring, and the second fastener penetrates through the joint of the combined porcelain bushing 6 and the oil tank, the second sealing ring and the second pressing ring to fixedly connect the combined porcelain bushing 6 and the oil tank. The utility model discloses combination formula insulator 6's one end is through first sealing washer, first clamping ring and first fastener and 1 fixed connection of expander, and combination formula insulator 6's the other end passes through second sealing washer, second clamping ring and second fastener and oil tank fixed connection, and stable in structure is reliable.
As shown in fig. 1, the utility model discloses product sign 13 that is used for sign product information is installed to oil-immersed current transformer's secondary terminal box 7's lateral wall, is used for sign product information on the product sign 13, sets up the lateral wall at secondary terminal box 7, and is put rationally. The outer side wall of the expander 1 is provided with a display device 102 for displaying the position of the insulating oil level, the expander can complete expansion buffering of the insulating oil, the outer side wall of the expander 1 is provided with a display device 102 for displaying the position of the insulating oil level, the display device 102 can display the position of the insulating oil level, and the display device 102 is marked with upper limit liquid level scales and lower limit liquid level scales.
The method for manufacturing the oil-immersed current transformer of the present invention is described below with reference to fig. 1 and 2.
The expander 1 is placed at the upper end of the combined porcelain bushing 6 and is firmly fastened through a first sealing ring, a first pressing ring and a first fastening piece; the primary terminals 2 are assembled on the left side and the right side of the combined porcelain bushing 6 with the function of an oil conservator, so that parts such as a metal oil conservator, a small porcelain bushing, an insulating ring and the like are saved, and the product cost is reduced.
The conducting rod with the left-handed thread and the right-handed thread of the primary terminal 2 penetrates through the second mounting hole 511 of the current transformer body 5 and is reliably and electrically connected with the right-handed fastening nut 3 and the left-handed locking nut 4 respectively, so that the phenomena of local heating and overhigh temperature rise caused by the increase of the primary end contact resistance due to loosening are effectively avoided.
The lower end of the combined porcelain bushing 6 is firmly fastened with an upper oil tank 9 containing a secondary junction box 7 through a second sealing ring, a second pressing ring and a second fastener; the adjustable hinge 8 on the left side of the secondary junction box 7 and the fastening nut on the right side balance and adjust the sealing gap of the secondary junction box 7 on the left side and the right side, the IP protection grade of a product is improved, and the safety and reliability of the product are enhanced; the upper oil tank 9 and the lower oil tank 10 containing the mounting base are firmly fastened together through a third sealing ring and a third fastening piece.
In addition, the screw rod part of the primary terminal 2 is processed into a left-handed thread structure and a right-handed thread structure, and is matched with the thread pair self structures of the right-handed fastening nut 3 and the left-handed locking nut 4, so that the anti-loosening effect is simple and reliable. The combined porcelain bushing 6 is of an integral copying structure, the first porcelain bushing structure 61 and the second porcelain bushing structure 62 are formed by blank forming and integral sintering, the first mounting hole 601 required by the primary terminal 2 is machined and initially assembled on a semi-finished product, and the production process is simple and reliable. The adjustable hinge 8 is welded on the left side of the secondary junction box 7, and the sealing effect is simple and reliable through the adjusting screw rod and the nut which are arranged on the adjustable hinge 8 and the locking nut on the right side of the secondary junction box 7 according to the size of the sealing gap on the secondary junction box 7.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (9)
1. The utility model provides an oily formula current transformer which characterized in that: comprises an expander (1), an expander body (5), a combined porcelain bushing (6) filled with insulating oil inside and an oil tank; the device body (5) is arranged inside the combined porcelain bushing (6), one end of the combined porcelain bushing (6) is connected with the expander (1), and the other end of the combined porcelain bushing is connected with the oil tank; two sides of the combined porcelain bushing (6) are respectively provided with a primary terminal (2), and the oil tank is provided with a secondary junction box (7);
the combined porcelain bushing (6) comprises a cylindrical first porcelain bushing structure (61) at the upper part and a second porcelain bushing structure (62) at the lower part, wherein the outer surface of the first porcelain bushing structure (61) is wavy, the upper end of the first porcelain bushing structure (61) is fixedly connected with the expander (1), the lower end of the second porcelain bushing structure (62) is fixedly connected with an oil tank, the first porcelain bushing structure (61) and the second porcelain bushing structure (62) are integrally formed, and the diameter of the first porcelain bushing structure (61) is larger than that of the second porcelain bushing structure (62);
and the conducting rod of each primary terminal (2) penetrates through the combined porcelain bushing (6) to be connected with the transformer body (5).
2. The oil-filled current transformer of claim 1, wherein: the conducting rod of each primary terminal (2) is connected with a conducting strip (51) of the transformer body (5) through two right-handed locking nuts (3) and one left-handed locking nut (4), and the conducting strip (51) of the transformer body (5) extends into the first porcelain bushing structure (61); the two right-handed locking nuts (3) are respectively positioned at two sides of the conducting strip (51), and one left-handed locking nut (4) is positioned at one side of the right-handed locking nut (3) close to the center of the transformer body (5).
3. The oil-filled current transformer of claim 2, wherein: be equipped with on combination formula insulator (6) with first mounting hole (601) of the conducting rod installation of primary terminal (2), be equipped with on conducting strip (51) with the conducting rod installation complex second mounting hole (511) of primary terminal (2), be equipped with on the conducting rod of primary terminal (2) two dextrorotation lock nut (3) and a levogyration lock nut (4) and install complex dextrorotation screw thread and levogyration screw thread respectively.
4. The oil-filled current transformer of claim 1, wherein: one end of the combined porcelain bushing (6) is fixedly connected with the expander (1) through a first sealing ring, a first pressing ring and a first fastener; the first sealing ring is positioned at the joint of the combined porcelain bushing (6) and the expander (1), the first pressing ring is tightly attached to the first sealing ring, and the first fastener penetrates through the joint of the combined porcelain bushing (6) and the expander (1), the first sealing ring and the first pressing ring to fixedly connect the combined porcelain bushing (6) and the expander (1).
5. The oil-filled current transformer of claim 1, wherein: the other end of the combined porcelain bushing (6) is fixedly connected with the oil tank through a second sealing ring, a second pressing ring and a second fastener; the second sealing ring is positioned at the joint of the combined porcelain bushing (6) and the oil tank, the second pressing ring is tightly attached to the second sealing ring, and the second fastener penetrates through the joint of the combined porcelain bushing (6) and the oil tank, the second sealing ring and the second pressing ring to fixedly connect the combined porcelain bushing (6) and the oil tank.
6. The oil-filled current transformer of claim 1, wherein: the oil tank includes oil tank (9), oil tank (10) down and is used for installing installation base (11) of oil tank (10) down, goes up oil tank (9) and passes through third sealing washer and third fastener fixed connection with oil tank (10) down, install in the lateral wall of last oil tank (9) secondary terminal box (7).
7. The oil-filled current transformer of claim 1, wherein: and a product label (13) for marking product information is installed on the outer side wall of the secondary junction box (7).
8. The oil-filled current transformer of claim 1, wherein: and two sides of the secondary junction box (7) are respectively fixed on the oil tank through an adjustable hinge (8) and a fastening nut (12).
9. The oil-filled current transformer of claim 1, wherein: the outer side wall of the expander (1) is provided with a display device (102) for displaying the position of the insulating oil level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920766275.4U CN210223764U (en) | 2019-05-24 | 2019-05-24 | Oil-immersed current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920766275.4U CN210223764U (en) | 2019-05-24 | 2019-05-24 | Oil-immersed current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210223764U true CN210223764U (en) | 2020-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920766275.4U Active CN210223764U (en) | 2019-05-24 | 2019-05-24 | Oil-immersed current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210223764U (en) |
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2019
- 2019-05-24 CN CN201920766275.4U patent/CN210223764U/en active Active
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