CN218894979U - Vacuum butterfly valve for transformer with high sealing reliability - Google Patents
Vacuum butterfly valve for transformer with high sealing reliability Download PDFInfo
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- CN218894979U CN218894979U CN202320049992.1U CN202320049992U CN218894979U CN 218894979 U CN218894979 U CN 218894979U CN 202320049992 U CN202320049992 U CN 202320049992U CN 218894979 U CN218894979 U CN 218894979U
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- 238000007789 sealing Methods 0.000 title claims abstract description 94
- 238000003825 pressing Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 8
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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Abstract
The utility model relates to a vacuum butterfly valve for a transformer with high sealing reliability, which comprises a valve body, a valve plate and a valve shaft; the valve plate is fixed on the valve shaft and comprises a first step, a second step and a third step; the second step is sleeved with a first special-shaped sealing ring, and the first special-shaped sealing ring is in interference fit with the inner wall of the valve body; an annular groove is formed in the inner side face of the first special-shaped sealing ring, and an annular protrusion matched with the annular groove is formed in the outer side face of the first step; a pressing ring for pressing the first special-shaped sealing ring is sleeved on the third step; the pressing ring is fixed on the valve plate. The vacuum butterfly valve for the transformer adopts the special-shaped sealing ring to realize sealing, the pressing ring for pressing the sealing ring is arranged on the outer side of the sealing ring, and the annular bulge on the valve plate is matched with the inner side surface of the sealing ring to form a limiting annular groove, so that the installation firmness of the sealing ring is high, the phenomenon that the sealing ring falls off can be avoided, and the sealing performance and the use reliability of the butterfly valve are improved.
Description
Technical Field
The utility model relates to the technical field of butterfly valves, in particular to a vacuum butterfly valve with high sealing reliability for a transformer.
Background
The vacuum butterfly valve for the transformer is generally arranged between the oil immersed transformer oil tank and the equipment such as the cooler, the radiator and the oil storage cabinet and is used for controlling the oil circulation between the oil immersed transformer oil tank and the equipment when the transformer is subjected to vacuum oil injection and operation maintenance. When the transformer works, the butterfly valve is in an open state, and the transformer oil freely circulates under the action of pressure; when the transformer is transported or maintained and debugged, the butterfly valve is in a closed state, and the oil way is cut off, so that the transformer main body is isolated from the outside.
At present, a vacuum butterfly valve for a transformer generally comprises a valve body, a valve plate and a valve shaft, wherein the valve plate is fixedly connected with the valve shaft and arranged in the valve body, can rotate relative to the valve body, and is sealed with the valve body through an O-shaped sealing ring. However, the vacuum butterfly valve with the structure has the risk that the sealing ring falls off after being used for a period of time, so that the sealing performance of the vacuum butterfly valve is poor, and the leakage phenomenon occurs; and the O-shaped sealing ring is soaked in high-temperature oil for a long time, so that the phenomena of oil absorption swelling, aging and permanent deformation can occur, the valve plate can not be opened or can not be normally closed, and great inconvenience is caused to the on-site installation, after-sales service, overhauling of the transformer, vacuumizing and the like of the transformer.
Disclosure of Invention
The utility model provides a vacuum butterfly valve for transformer of high seal reliability for overcome the problem that exists among the prior art. According to the vacuum butterfly valve with high sealing reliability, the special-shaped sealing ring is adopted to realize sealing between the valve body and the valve plate, the pressing ring used for pressing the sealing ring is arranged on the outer side of the sealing ring, and the annular bulge on the valve plate is matched with the inner side surface of the sealing ring to form a limiting annular groove, so that the sealing ring and the valve plate have high connection firmness, the phenomenon that the sealing ring falls off can be avoided, and the sealing performance of the butterfly valve is improved; in addition, the sealing ring adopts a special-shaped structure, has good elasticity and compression deformation resistance, so that the compression permanent deformation of the sealing ring can be reduced, the condition that the butterfly valve is not opened or closed is prevented, and the use reliability of the butterfly valve is improved.
The technical scheme of the application is as follows:
the vacuum butterfly valve for the transformer with high sealing reliability comprises a valve body, a valve plate and a valve shaft; the valve plate is arranged in the through hole in the middle of the valve body and is fixed on the valve shaft; one end of the valve shaft is rotationally connected with the inner wall of the valve body, and the other end of the valve shaft penetrates out of the shaft hole on the valve body and is connected with the driving device; the valve plate comprises a first step, a second step and a third step; the second step is sleeved with a first special-shaped sealing ring, and the first special-shaped sealing ring is in interference fit with the inner wall of the valve body; an annular groove is formed in the inner side face of the first special-shaped sealing ring, and an annular bulge is formed in the outer side face of the first step correspondingly; the annular protrusion is embedded into the annular groove; the third step is sleeved with a pressing ring used for pressing the first special-shaped sealing ring, and the pressing ring is fixedly connected with the valve plate through a screw.
Compared with the prior art, the vacuum butterfly valve with high sealing reliability is used for realizing the sealing between the valve body and the valve plate by adopting the special-shaped sealing ring, the contact range between the sealing ring and the inner wall of the valve body is larger, and the sealing performance is good; the valve plate is in a ladder shape, the special-shaped sealing ring is sleeved on the step of the valve plate, and is matched with the annular bulge on the valve plate to form limit by arranging the annular groove on the inner side surface of the special-shaped sealing ring so as to improve the bonding strength between the special-shaped sealing ring and the valve plate, the valve plate is also fixedly provided with a pressing ring, the pressing ring is arranged on the outer side of the special-shaped sealing ring, and the special-shaped sealing ring is tightly pressed through the clamping and pressing type design, so that the special-shaped sealing ring is closely attached to the valve plate, the connection firmness between the special-shaped sealing ring and the valve plate is improved, the phenomenon that the sealing ring falls off is avoided, and the sealing performance of the butterfly valve is improved; in addition, the sealing ring adopts a special-shaped structure, has good elasticity and compression deformation resistance, so that the compression permanent deformation of the sealing ring can be reduced, the condition that a valve plate is not opened or closed after the butterfly valve is used for a long time is prevented, and the use reliability of the butterfly valve is improved.
In the vacuum butterfly valve for the transformer with high sealing reliability, a group of first mounting holes are uniformly formed in the pressing ring along the circumferential direction, and a group of first threaded holes are uniformly formed in the valve plate along the circumferential direction correspondingly. Therefore, when the pressing ring is fixed, the pressure of the screw on the pressing ring can be dispersed, the pressing ring is favorable for balancing the stress, the surface of the pressing ring is prevented from being cracked, and the connection firmness between the pressing ring and the valve plate can be ensured. Further, the first mounting hole is a counter bore. When the clamping ring is installed, the head of the screw is positioned in the counter bore, so that the screw and other parts can be prevented from interfering in the use process of the butterfly valve.
As optimization, in the vacuum butterfly valve for the transformer with high sealing reliability, the driving device comprises a limiting seat and a rotary switch; the rotary switch is connected with the valve shaft, and the limit seat is fixed on the valve body; the rotary switch is provided with a limiting bulge, and correspondingly, the limiting seat is provided with a limiting spigot which is matched with the limiting bulge to limit the rotary switch to rotate. After the driving device adopts the structure, the assembly is simple and the implementation is easy.
Further, a handle is arranged on the rotary switch. Therefore, an operator can conveniently grasp the handle to rotate the rotary switch, and one end of the rotary switch is lengthened by the arrangement of the handle, so that the operating torque is increased, and the operation is more labor-saving. Further, the end part of the valve shaft is provided with a square shaft head, and the rotary switch is sleeved outside the square shaft head. Therefore, the mutual rotation between the valve shaft and the rotary switch can be avoided; and the working state of the butterfly valve is convenient to observe, when the handle is parallel to the valve body, the butterfly valve is in a closed state, and when the handle is perpendicular to the valve body, the butterfly valve is in an open state, so that misoperation can be prevented.
In the vacuum butterfly valve for the transformer with high sealing reliability, as optimization, two side surfaces of the valve body are respectively provided with an annular groove, and a second special-shaped sealing ring is arranged in the annular groove. Thus, the butterfly valve can play a role of sealing when being installed.
In the vacuum butterfly valve for the transformer with high sealing reliability, an O-shaped sealing ring is arranged between the valve shaft and the shaft hole. Thus, the sealing performance of the valve shaft can be ensured.
As optimization, in the vacuum butterfly valve for the transformer with high sealing reliability, the limiting seat is fixedly connected with the valve body through a screw; the valve shaft is fixedly connected with the valve plate through screws. At this time, the structure is simple, easy dismounting.
In the vacuum butterfly valve for the transformer with high sealing reliability, the first special-shaped sealing ring and the second special-shaped sealing ring can be made of nitrile rubber. The nitrile rubber has good oil resistance and heat resistance, and the sealing ring is made of the nitrile rubber, so that good sealing performance of the nitrile rubber can be ensured.
Drawings
FIG. 1 is a schematic view of a vacuum butterfly valve for a transformer with high sealing reliability according to the present application;
FIG. 2 is a rear view of the high seal reliability vacuum butterfly valve for the transformer of FIG. 1;
FIG. 3 is a B-B cross-sectional view of FIG. 2;
FIG. 4 isbase:Sub>A cross-sectional view taken along the direction A-A in FIG. 2;
FIG. 5 is an enlarged schematic view of portion C of FIG. 4;
FIG. 6 is a schematic structural view of the valve body of the present application;
FIG. 7 is a schematic illustration of the assembly of the valve shaft with the valve plate of the present application;
fig. 8 is a schematic structural view of the driving device in the present application.
The marks in the drawings are: 1-a valve body, 101-a through hole, 102-a shaft hole, 103-an annular groove, 104-a second threaded hole and 105-a mounting threaded hole; 2-a valve plate, 201-a first step, 2011-an annular protrusion, 202-a second step, 203-a third step, 204-a first threaded hole, 205-a third threaded hole; 3-valve shafts, 301-square shaft heads, 302-third mounting holes, 303-grooves and 304-circular baffles; the device comprises a 4-driving device, a 401-limiting seat, a 4011-limiting spigot, a 4012-second mounting hole, a 402-rotary switch, a 4021-limiting boss and a 4022-handle; 5-a first special-shaped sealing ring and 501-an annular groove; 6-pressing ring, 601-first mounting hole; 7-a second special-shaped sealing ring; 8-O type sealing washer.
Detailed Description
The present application is further illustrated in the following figures and examples, which are not intended to be limiting.
Referring to fig. 1 to 8, the high sealing reliability vacuum butterfly valve for the transformer of the present application comprises a valve body 1, a valve plate 2 and a valve shaft 3; the valve plate 2 is arranged in a through hole 101 in the middle of the valve body 1 and is fixed on the valve shaft 3; one end of the valve shaft 3 is rotationally connected with the inner wall of the valve body 1, and the other end of the valve shaft penetrates out of the shaft hole 101 on the valve body 1 and is connected with the driving device 4; the valve plate 2 is stepped and comprises a first step 201, a second step 202 and a second step 203; the second step 202 is sleeved with a first special-shaped sealing ring 5, and the first special-shaped sealing ring 5 is in interference fit with the inner wall of the valve body 1; an annular groove 501 is formed in the inner side surface of the first special-shaped sealing ring 5, and an annular protrusion 2011 is correspondingly formed in the outer side surface of the first step 201; the annular protrusion 2011 is embedded in the annular groove 501; the third step 203 is sleeved with a pressing ring 6 for pressing the first special-shaped sealing ring 5; the pressing ring 6 is fixedly connected with the valve plate 2 through screws.
Examples:
in this embodiment, the valve body 1 is square; the first step 201, the second step 202 and the third step 203 are all circular.
In this embodiment, 6 first mounting holes 601 are uniformly formed in the pressing ring 6 along the circumferential direction, and correspondingly, 6 first threaded holes 2021 are uniformly formed in the first step 202 along the circumferential direction; the screw passes through the first mounting hole 601 and is fixed in the first screw hole 2021. Therefore, when the pressing ring 6 is fixed, the pressure caused by the screw on the pressing ring 6 can be dispersed, the stress balance of the pressing ring 6 is facilitated, the surface of the pressing ring 6 is prevented from being cracked, and the connection firmness between the pressing ring 6 and the valve plate 2 can be ensured. Further, the first mounting hole 601 is a counter bore. When the pressing ring 6 is installed, the head of the screw is positioned in the counter bore, so that the screw and other parts can be prevented from interfering in the use process of the butterfly valve.
In this embodiment, the driving device 4 includes a limiting seat 401 and a rotary switch 402; the rotary switch 402 is connected with the valve shaft 3, and the limit seat 401 is fixed on the valve body 1; the rotary switch 402 is provided with a limiting protrusion 4021, and correspondingly, the limiting seat 401 is provided with a limiting spigot 4011 which is matched with the limiting protrusion 4021 to limit the rotary switch 402 to rotate. The driving device 4 is simple to assemble and easy to implement after adopting the structure.
Further, a handle 4022 is provided on the rotary switch 402. Thus, the operator can grasp the handle 4022 to rotate the rotary switch, and the arrangement of the handle 4022 lengthens one end of the rotary switch 402, thereby increasing the operating torque and saving more labor in operation. Further, the end of the valve shaft 3 is provided with a square shaft head 301, a circular baffle 304 is arranged below the square shaft head 301, the circular baffle 304 is located outside the valve body 1, the rotary switch 402 is sleeved outside the square shaft head 301 and the circular baffle 304 (a square hole matched with the square shaft head 301 and a circular hole matched with the circular baffle 304 are formed in the rotary switch 402, the square shaft head 301 is located in the square hole, and the circular baffle 304 is located in the circular hole). When the rotary switch 402 is rotated, the valve shaft 3 is driven to synchronously rotate, and the end part of the valve shaft 3 is designed to be square, so that the mutual rotation between the valve shaft 3 and the rotary switch 402 can be avoided; and be convenient for also observe the operating condition of butterfly valve, be the closed condition when handle 4022 is parallel with valve body 1, be the open condition when handle 4022 is perpendicular with valve body 1, can prevent to appear the maloperation. An indication arrow is arranged on the handle 4022, and a switch indication mark is arranged on the limiting seat 401. Further, the limiting seat 401 is fixedly connected with the valve body 1 through a screw; the limiting seat 401 is positioned on two sides of the rotary switch 402, and is respectively provided with a second mounting hole 4012, and correspondingly, two ends of the top of the valve body 1 are respectively provided with a second threaded hole 104, and the screw passes through the second mounting hole 4012 and is fixed in the second threaded hole 104; the second mounting hole 4012 is a counter bore.
In this embodiment, two side surfaces of the valve body 1 are respectively provided with an annular groove 103, and a second special-shaped sealing ring 7 is arranged in the annular groove 103. The second special-shaped sealing ring 7 can play a role in sealing when the butterfly valve is installed between the transformer oil tank and various devices (such as a cooler, a radiator, an oil storage tank and the like). The valve body 1 is provided with 4 mounting screw holes 105.
In this embodiment, an O-ring 8 is disposed between the valve shaft 3 and the shaft hole 101; two annular grooves 303 are formed in the outer circumferential surface of the valve shaft 3 at intervals, and the O-shaped sealing ring 8 is embedded into the grooves 303 and is in interference fit with the inner wall of the shaft hole 102. Thus, the sealing performance of the valve shaft 3 can be ensured.
In this embodiment, the valve shaft 3 is fixedly connected with the valve plate 2 through a screw; two third mounting holes 302 are formed in the valve shaft 3 at intervals, two third threaded holes 205 are formed in the valve plate 2 at intervals correspondingly, and the screws penetrate through the third mounting holes 302 and are fixed in the third threaded holes 205. At this time, the structure is simple, easy dismounting.
In this embodiment, the first special-shaped sealing ring 5, the second special-shaped sealing ring 7 and the O-shaped sealing ring 8 are made of nitrile rubber. The nitrile rubber has good oil resistance and heat resistance, and the sealing ring is made of the nitrile rubber, so that good sealing performance of the nitrile rubber can be ensured.
In the utility model, the special-shaped sealing ring means that the cross section of the sealing ring is not round or rectangular, but is in other shapes.
The above general description of the utility model and the description of specific embodiments thereof referred to in this application should not be construed as limiting the scope of the utility model. Those skilled in the art can add, subtract or combine the features disclosed in the foregoing general description and/or the detailed description (including examples) to form other technical solutions within the scope of the present application without departing from the disclosure of the present application.
Claims (9)
1. The vacuum butterfly valve for the transformer with high sealing reliability comprises a valve body (1), a valve plate (2) and a valve shaft (3); the valve plate (2) is arranged in a through hole (101) in the middle of the valve body (1) and is fixed on the valve shaft (3); the method is characterized in that: one end of the valve shaft (3) is rotationally connected with the inner wall of the valve body (1), and the other end of the valve shaft penetrates out of a shaft hole (102) on the valve body (1) and is connected with the driving device (4); the valve plate (2) is in a step shape and comprises a first step (201), a second step (202) and a third step (203); the second step (202) is sleeved with a first special-shaped sealing ring (5), and the first special-shaped sealing ring (5) is in interference fit with the inner wall of the valve body (1); an annular groove (501) is formed in the inner side surface of the first special-shaped sealing ring (5), and an annular bulge (2011) is formed in the outer side surface of the first step (201) correspondingly; the annular protrusion (2011) is embedded in the annular groove (501); the third step (203) is sleeved with a pressing ring (6) for pressing the first special-shaped sealing ring (5), and the pressing ring (6) is fixedly connected with the valve plate (2) through a screw.
2. The high seal reliability vacuum butterfly valve for a transformer of claim 1, wherein: a group of first mounting holes (601) are uniformly formed in the pressing ring (6) along the circumferential direction, and a group of first threaded holes (204) are uniformly formed in the valve plate (2) along the circumferential direction correspondingly.
3. The high seal reliability vacuum butterfly valve for a transformer of claim 2, wherein: the first mounting hole (601) is a counter bore.
4. The high seal reliability vacuum butterfly valve for a transformer of claim 1, wherein: the driving device (4) comprises a limiting seat (401) and a rotary switch (402); the rotary switch (402) is connected with the valve shaft (3), and the limit seat (401) is fixed on the valve body (1); the rotary switch (402) is provided with a limiting protrusion (4021), and correspondingly, the limiting seat (401) is provided with a limiting spigot (4011) which is matched with the limiting protrusion (4021) to limit the rotary switch (402) to rotate.
5. The high seal reliability vacuum butterfly valve for a transformer of claim 4, wherein: a handle (4022) is arranged on the rotary switch (402).
6. The high seal reliability vacuum butterfly valve for a transformer of claim 5, wherein: the end part of the valve shaft (3) is provided with a square shaft head (301), and the rotary switch (402) is sleeved outside the square shaft head (301).
7. The high seal reliability vacuum butterfly valve for a transformer of claim 1, wherein: two side surfaces of the valve body (1) are respectively provided with an annular groove (103), and a second special-shaped sealing ring (7) is arranged in the annular groove (103).
8. The high seal reliability vacuum butterfly valve for a transformer of claim 1, wherein: an O-shaped sealing ring (8) is arranged between the valve shaft (3) and the shaft hole (102).
9. The high seal reliability vacuum butterfly valve for a transformer of claim 4, wherein: the limiting seat (401) is fixedly connected with the valve body (1) through a screw; the valve shaft (3) is fixedly connected with the valve plate (2) through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320049992.1U CN218894979U (en) | 2023-01-09 | 2023-01-09 | Vacuum butterfly valve for transformer with high sealing reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320049992.1U CN218894979U (en) | 2023-01-09 | 2023-01-09 | Vacuum butterfly valve for transformer with high sealing reliability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218894979U true CN218894979U (en) | 2023-04-21 |
Family
ID=85998083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320049992.1U Active CN218894979U (en) | 2023-01-09 | 2023-01-09 | Vacuum butterfly valve for transformer with high sealing reliability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218894979U (en) |
-
2023
- 2023-01-09 CN CN202320049992.1U patent/CN218894979U/en active Active
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 317113 Yunxi Village, Shaliu Street, Sanmen County, Taizhou City, Zhejiang Province Patentee after: Zhejiang Liqiao Technology Co.,Ltd. Country or region after: China Address before: No. 56 Xiangxiang Lane, Jiantiao Town, Sanmen County, Taizhou City, Zhejiang Province, 317109 Patentee before: Taizhou Liqiao Technology Co.,Ltd. Country or region before: China |
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