CN213982075U - Oil-immersed mutual inductor and oil taking assembly thereof - Google Patents
Oil-immersed mutual inductor and oil taking assembly thereof Download PDFInfo
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- CN213982075U CN213982075U CN202120028179.7U CN202120028179U CN213982075U CN 213982075 U CN213982075 U CN 213982075U CN 202120028179 U CN202120028179 U CN 202120028179U CN 213982075 U CN213982075 U CN 213982075U
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Abstract
The utility model discloses an oil-immersed mutual inductor and an oil taking assembly thereof, wherein the oil taking assembly comprises an oil taking nozzle and an oil valve which is used for being in threaded connection with the mutual inductor, the oil valve comprises a valve core, one end of the valve core, which is far away from the mutual inductor, is provided with an oil outlet, an ejector pin, a compression spring and a limiting part which is used for preventing the compression spring from being separated are sequentially arranged in an inner cavity of the valve core from inside to outside, and the compression spring is used for compressing the ejector pin on the bottom surface of the inner cavity; get the glib and include connecting portion, play glib and the compact heap of being connected with the case, the compact heap is connected and is communicated connecting portion and play glib, and when connecting portion were connected with the case, the compact heap promoted the thimble and leaves the bottom surface of inner chamber. Because the sealing between the thimble and the bottom surface of the inner cavity of the valve core is plane sealing, the requirement on the machining precision of the sealing surface is lower, and the surface roughness of the sealing surface is only required to be less than or equal to Ra 25, so that the valve core is easy to machine and manufacture; meanwhile, the oil pressure direction is consistent with the pressing force of the spring, so that the thimble is tightly attached to the bottom surface of the inner cavity of the valve core, and the leakage at the sealing surface is avoided.
Description
Technical Field
The utility model relates to a mutual-inductor technical field, more specifically say, relate to an oil extraction subassembly. Furthermore, the utility model also discloses an oily formula mutual-inductor of including above-mentioned subassembly of getting oil.
Background
And an oil valve is arranged at the bottom of the oil-immersed transformer so as to discharge the transformer oil at the lowest position.
In the prior art, an oil valve of an oil immersed transformer is mostly sealed by steel balls 04, as shown in fig. 1, one end of a valve body 01 is in threaded connection with an oil nozzle seat 06 of the transformer, and the other end of the valve body 01 is in threaded connection with an oil nozzle cover 05; an oil outlet is formed in one end, far away from the oil nozzle seat 06, of the valve body 01, a limiting screw 02, a spring 03 and a steel ball 04 are sequentially installed in an inner cavity of the valve body 01, and the steel ball 04 is abutted to the oil outlet through the spring 03.
Because the steel ball 04 and the valve body 01 are in line sealing, in order to ensure that the sealing part does not leak oil, the requirements on the processing precision of the steel ball 04 and the valve body 01 are extremely high, and the production is difficult; due to factors such as machining precision, it is often found that transformer oil leaks linearly from the oil outlet of the valve body 01 when the nozzle tip cover 05 is removed.
In summary, how to reduce the leakage at the oil valve seal is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an get oily subassembly, the delivery port department of fuel tap is plane seal, easy processing and difficult seepage.
Furthermore, the utility model also provides an oily formula mutual-inductor of subassembly including above-mentioned getting oil.
In order to achieve the above object, the present invention provides the following technical solutions:
an oil taking assembly comprises an oil taking nozzle and an oil valve which is used for being in threaded connection with a mutual inductor, wherein the oil valve comprises a valve core, an oil outlet is formed in one end, away from the mutual inductor, of the valve core, an ejector pin, a compression spring and a limiting piece used for preventing the compression spring from falling off are sequentially installed in an inner cavity of the valve core from inside to outside, and the compression spring is used for compressing the ejector pin on the bottom surface of the inner cavity;
the oil taking nozzle comprises a connecting part, an oil outlet nozzle and a pressing block, the connecting part, the oil outlet nozzle and the pressing block are connected with the valve core, the pressing block is connected with and communicated with the connecting part and the oil outlet nozzle, and when the connecting part is connected with the valve core, the pressing block pushes the ejector pin to leave the bottom surface of the inner cavity.
Preferably, the connecting part is provided with an internal thread, and one end of the valve core, which is far away from the mutual inductor, is provided with an external thread matched with the internal thread.
Preferably, the thimble comprises a limiting part sleeved in the oil outlet and a sealing part used for contacting and sealing with the bottom surface of the inner cavity, and the limiting part is vertically connected with the sealing part.
Preferably, the limiting part is a limiting column, and the diameter of the limiting column is the same as the inner diameter of the oil outlet.
Preferably, the length of the limiting column is greater than or equal to the depth of the oil outlet.
Preferably, the pressing block comprises a pushing portion for pushing the thimble and a communicating portion for communicating the connecting portion and the oil outlet nozzle, and the pushing portion is connected to an end face of the communicating portion, which is close to the connecting portion;
the communicating part is provided with a plurality of oil outlets.
Preferably, the oil outlet holes are uniformly distributed in the circumferential direction of the communication portion.
Preferably, the limiting part comprises a sleeve and a clamping ring, a clamping groove for mounting the clamping ring is formed in the inner wall surface of the valve core, and the sleeve is arranged between the compression spring and the clamping ring.
Preferably, a sealing gasket is arranged between the thimble and the bottom surface of the inner cavity.
The oil-immersed transformer comprises a main body and an oil taking assembly arranged at the bottom of the main body, wherein the oil taking assembly is any one of the oil taking assemblies.
The utility model provides an oil taking assembly, including getting the glib talker and being used for the fuel tap with mutual-inductor threaded connection, the fuel tap includes the case, and the case is kept away from the one end of mutual-inductor and is equipped with the oil-out, installs thimble, pressure spring and the locating part that is used for preventing pressure spring from deviating from inside to outside in proper order in the inner chamber of case, and pressure spring is used for compressing tightly the thimble on the bottom surface of inner chamber; get the glib and include connecting portion, play glib and the compact heap of being connected with the case, the compact heap is connected and is communicated connecting portion and play glib, and when connecting portion were connected with the case, the compact heap promoted the thimble and leaves the bottom surface of inner chamber.
When oil drainage is not needed, the ejector pin is pressed on the surface of the inner cavity by the pressing spring, so that the ejector pin and the bottom surface of the inner cavity of the valve core are sealed in a plane mode, the oil pressure direction in the valve core is consistent with the pressing force direction of the pressing spring, and the ejector pin is further pressed on the bottom surface of the inner cavity; when needing the oil drain, connect the case and get the connecting portion of glib talker, get the compact heap of glib talker and push away the bottom surface of inner chamber with the thimble, hydraulic oil accessible oil-out, get the compact heap of glib talker, get the glib talker's play oil outlet outflow.
Because the sealing between the thimble and the bottom surface of the inner cavity of the valve core is plane sealing, compared with the line sealing of steel balls in the prior art, the requirement on the machining precision of a sealing surface is lower, the surface roughness of the sealing surface is only required to be Ra less than or equal to 25, and the machining and the manufacturing are easy; meanwhile, the oil pressure direction is consistent with the pressing force of the spring, so that the thimble is tightly attached to the bottom surface of the inner cavity of the valve core, and the leakage at the sealing surface is avoided.
Furthermore, the utility model also provides an oily formula mutual-inductor of subassembly including above-mentioned getting oil.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art oil valve;
fig. 2 is a schematic cross-sectional view of an embodiment of an oil valve of the oil extraction assembly provided by the present invention;
fig. 3 is a schematic cross-sectional view of an embodiment of a nozzle of the oil extraction assembly provided by the present invention;
fig. 4 is a side view of the compact of fig. 3.
In fig. 1-4:
01 is a valve body, 02 is a limit screw, 03 is a spring, 04 is a steel ball, 05 is a nozzle cover, 06 is a nozzle seat, 1 is an oil valve, 11 is a valve core, 12 is an ejector pin, 13 is a compression spring, 14 is a sleeve, 15 is a collar, 16 is a sealing gasket, 2 is a nozzle, 21 is a connecting part, 22 is a compression block, 221 is an oil outlet, and 23 is an oil outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide an oil taking assembly, the oil valve oil outlet is located for the plane seal, easily processing and difficult seepage.
Furthermore, the utility model also provides an oily formula mutual-inductor of subassembly including above-mentioned getting oil.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a prior art oil valve; fig. 2 is a schematic cross-sectional view of an embodiment of an oil valve of the oil extraction assembly provided by the present invention; fig. 3 is a schematic cross-sectional view of an embodiment of a nozzle of the oil extraction assembly provided by the present invention; fig. 4 is a side view of the compact of fig. 3.
The oil extraction assembly provided by the embodiment comprises an oil extraction nozzle 2 and an oil valve 1 which is in threaded connection with a mutual inductor, wherein the oil valve 1 comprises a valve core 11, an oil outlet is formed in one end, away from the mutual inductor, of the valve core 11, a thimble 12, a compression spring 13 and a limiting piece for preventing the compression spring 13 from falling off are sequentially installed in an inner cavity of the valve core 11 from inside to outside, and the compression spring 13 is used for compressing the thimble 12 on the bottom surface of the inner cavity; the oil taking nozzle 2 comprises a connecting portion 21 connected with the valve core 11, an oil outlet nozzle 23 and a pressing block 22, the pressing block 22 is connected with and communicated with the connecting portion 21 and the oil outlet nozzle 23, and when the connecting portion 21 is connected with the valve core 11, the pressing block 22 pushes the thimble 12 to be away from the bottom surface of the inner cavity.
Referring to fig. 2, an external thread for threaded connection with a nozzle base on a transformer is provided on an outer wall surface of the valve core 11; the thimble 12, the pressure spring 13 and the limiting piece are installed in the inner cavity of the valve core 11, the thimble 12, the pressure spring 13 and the limiting piece jointly form a sealing structure in the valve core 11, an oil outlet is arranged at one end of the valve core 11 far away from the mutual inductor, and the thimble 12 abuts against the bottom surface of the inner cavity of the valve core 11 under the action of the pressure spring 13.
The thimble 12 is in contact with and sealed with the bottom surface of the inner cavity of the valve core 11, so that the surface of the thimble 12 is attached to the bottom surface of the inner cavity of the valve core 11.
Preferably, referring to fig. 2, the thimble 12 may include a limiting portion sleeved in the oil outlet and a sealing portion for contacting and sealing with the bottom surface of the inner cavity, and the limiting portion is vertically connected to the sealing portion. The design of the limiting part increases the contact area of the thimble 12 and the valve core 11, plays a role in guiding, and is favorable for resetting the thimble 12 after oil drainage.
Preferably, referring to fig. 1, the limiting portion is a limiting column, and the diameter of the limiting column is the same as the inner diameter of the oil outlet, so that the surface of the limiting column is attached to the inner wall surface of the oil outlet, and hydraulic oil is prevented from flowing out from a gap between the limiting column and the oil outlet.
Preferably, the length of the limiting column is greater than or equal to the depth of the oil outlet.
Of course, in order to simplify the structure of the thimble 12, only a seal portion for contact sealing with the bottom surface of the cavity may be provided.
Preferably, a gasket 16 is provided between the thimble 12 and the bottom surface of the inner cavity of the valve body 11, to further improve the sealing effect.
The limiting part is used for preventing the pressure spring 13 from dropping out of the inner cavity of the valve core 11, when the oil valve 1 is assembled, the thimble 12 and the pressure spring 13 are sequentially installed in the inner cavity of the valve core 11, then the limiting part is installed, the limiting part is used for preventing the pressure spring 13 from dropping out, and the pressure spring 13 is compressed to provide elastic pretightening force to enable the thimble 12 to abut against the bottom surface of the inner cavity of the valve core 11.
The limiting member may be a collar 15, or may be a limiting member mounted on the wall surface of the inner cavity of the valve core 11.
Preferably, the limiting member may include a sleeve 14 and a collar 15, a clamping groove for mounting the collar 15 is provided on an inner wall surface of the valve element 11, and the sleeve 14 is disposed between the pressing spring 13 and the collar 15.
The oil taking nozzle 2 is used for being matched with the oil valve 1 to discharge transformer oil in the transformer, and comprises a connecting part 21 connected with the valve core 11, a pressing block 22 used for pushing the thimble 12 to leave the bottom surface of the inner cavity of the valve core 11 and an oil outlet nozzle 23 used as an oil outlet channel.
The connecting portion 21 and the valve core 11 can be connected through threads or can be connected in a clamping manner, preferably, an internal thread can be arranged on the connecting portion 21, and an external thread matched with the internal thread is arranged at one end, away from the mutual inductor, of the valve core 11. Because the valve core 11 is in threaded connection with the mutual inductor and the oil drain nozzle 2, additional working procedures are not needed to be added, and the connecting strength is high and can bear larger oil pressure.
The pressing block 22 pushes the thimble 12 away from the bottom surface of the inner cavity of the valve core 11, that is, the distance from the outer end surface of the pressing block 22 to the outer end surface of the connecting portion 21 is smaller than the distance from the outer end surface of the thimble 12 to the position where the valve core 11 is used for being matched with the outer end surface of the connecting portion 21, so that when the connecting portion 21 is connected with the valve core 11, the pressing block 22 contacts with the thimble 12 and pushes the thimble 12 to move inwards and separate from the bottom surface.
Preferably, referring to fig. 3 and 4, the pressing block 22 includes a pushing portion for pushing the thimble 12 and a communicating portion for communicating the connecting portion 21 and the oil outlet 23, and the pushing portion is connected to an end surface of the communicating portion close to the connecting portion 21; the communicating part is provided with a plurality of oil outlet holes 221.
The oil outlet 221 communicates the communicating portion with the oil outlet nozzle 23, and may be formed in any shape such as a circular hole or a square hole.
The number of the oil outlet holes 221 may be set to one, two, or three or more. When the number of the oil outlet holes 221 is more than one, it is preferable that the oil outlet holes 221 be uniformly distributed in the circumferential direction of the communication portion.
When oil drainage is not needed, the thimble 12 is pressed on the surface of the inner cavity by the pressing spring 13, so that the thimble 12 is sealed with the bottom surface plane of the inner cavity of the valve core 11, the direction of oil pressure in the valve core 11 is consistent with the pressing force direction of the pressing spring 13, and the thimble 12 is further pressed on the bottom surface of the inner cavity; when oil drainage is needed, the valve core 11 and the connecting portion 21 of the oil taking nozzle 2 are connected, the pressing block 22 of the oil taking nozzle 2 pushes the thimble 12 away from the bottom surface of the inner cavity, and hydraulic oil can flow out through the oil outlet, the pressing block 22 of the oil taking nozzle 2 and the oil outlet 23 of the oil taking nozzle 2.
In the embodiment, the sealing between the thimble 12 and the bottom surface of the inner cavity of the valve core 11 is planar sealing, compared with the line sealing of a steel ball in the prior art, the requirement on the machining precision of the sealing surface is lower, the surface roughness of the sealing surface is only required to be Ra less than or equal to 25, and the machining and the manufacturing are easy; meanwhile, the oil pressure direction is consistent with the pressing force of the spring, so that the thimble 12 is tightly attached to the bottom surface of the inner cavity of the valve core 11, and the leakage at the sealing surface is avoided.
Except that the aforesaid gets oily subassembly, the utility model discloses still provide an including the oily formula mutual-inductor of getting oily subassembly that above-mentioned embodiment is disclosed, this oily formula mutual-inductor includes the main part and sets up in the subassembly of getting oily of main part bottom, and prior art is referred to the structure of main part, and this text is no longer repeated.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides an oily formula mutual-inductor and oily subassembly of getting thereof have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. The oil taking assembly is characterized by comprising an oil taking nozzle (2) and an oil valve (1) in threaded connection with a mutual inductor, wherein the oil valve (1) comprises a valve core (11), an oil outlet is formed in one end, far away from the mutual inductor, of the valve core (11), a thimble (12), a compression spring (13) and a limiting piece for preventing the compression spring (13) from falling off are sequentially arranged in an inner cavity of the valve core (11) from inside to outside, and the compression spring (13) is used for compressing the thimble (12) on the bottom surface of the inner cavity;
the oil taking nozzle (2) comprises a connecting portion (21) connected with the valve core (11), an oil outlet nozzle (23) and a pressing block (22), the pressing block (22) is connected with and communicated with the connecting portion (21) and the oil outlet nozzle (23), and when the connecting portion (21) is connected with the valve core (11), the pressing block (22) pushes the ejector pin (12) to leave the bottom surface of the inner cavity.
2. The oil extraction assembly according to claim 1, wherein the connecting portion (21) is provided with an internal thread, and an end of the valve core (11) away from the mutual inductor is provided with an external thread matched with the internal thread.
3. The oil extraction assembly according to claim 1, wherein the thimble (12) comprises a limiting portion sleeved in the oil outlet and a sealing portion for contacting and sealing with the bottom surface of the inner cavity, and the limiting portion is vertically connected with the sealing portion.
4. The oil extraction assembly of claim 3, wherein the limiting portion is a limiting post, and the diameter of the limiting post is the same as the inner diameter of the oil outlet.
5. The oil extraction assembly of claim 4, wherein the length of the spacing post is greater than or equal to the depth of the oil outlet.
6. The oil extraction assembly according to claim 1, wherein the pressing block (22) comprises a pushing portion for pushing the thimble (12) and a communicating portion for communicating the connecting portion (21) with the oil outlet nozzle (23), and the pushing portion is connected to an end surface of the communicating portion close to the connecting portion (21);
the communicating part is provided with a plurality of oil outlet holes (221).
7. The oil extraction assembly according to claim 6, wherein the oil outlet holes (221) are evenly distributed in a circumferential direction of the communication portion.
8. The oil extraction assembly according to any one of claims 1 to 7, wherein the limiting member comprises a sleeve (14) and a collar (15), a clamping groove for mounting the collar (15) is formed on an inner wall surface of the valve core (11), and the sleeve (14) is disposed between the compression spring (13) and the collar (15).
9. The oil extraction assembly according to claim 8, wherein a sealing gasket (16) is arranged between the thimble (12) and the bottom surface of the inner cavity.
10. An oil-immersed transformer, characterized by, includes the main part and sets up in the subassembly of getting oil of main part bottom, get the subassembly of getting oil of any claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120028179.7U CN213982075U (en) | 2021-01-06 | 2021-01-06 | Oil-immersed mutual inductor and oil taking assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120028179.7U CN213982075U (en) | 2021-01-06 | 2021-01-06 | Oil-immersed mutual inductor and oil taking assembly thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213982075U true CN213982075U (en) | 2021-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120028179.7U Active CN213982075U (en) | 2021-01-06 | 2021-01-06 | Oil-immersed mutual inductor and oil taking assembly thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213982075U (en) |
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2021
- 2021-01-06 CN CN202120028179.7U patent/CN213982075U/en active Active
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