CN210240621U - Plug valve capable of being used under high pressure difference - Google Patents
Plug valve capable of being used under high pressure difference Download PDFInfo
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- CN210240621U CN210240621U CN201921022544.2U CN201921022544U CN210240621U CN 210240621 U CN210240621 U CN 210240621U CN 201921022544 U CN201921022544 U CN 201921022544U CN 210240621 U CN210240621 U CN 210240621U
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- bottom shaft
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- valve rod
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Abstract
The utility model relates to a plug valve, specific plug valve that can use under the high pressure difference that says so belongs to plug valve technical field. The valve comprises a valve body, wherein a bottom shaft mounting hole is formed in the bottom of a valve rod hole of the valve body, a bottom shaft is fixed in the bottom shaft mounting hole, and the upper part of the bottom shaft extends into an inner cavity at the lower end of a valve core; an elastic gasket is arranged between the upper end surface of the bottom shaft and the lower end surface of the valve core, and the elastic gasket is upwards propped against the valve core; and an anti-blocking gasket is arranged between the lower end face of the valve cover and the upper end face of the valve core. The utility model discloses a mounting structure of lower bottom shaft of last valve stem can guarantee that the case uses under the high-pressure difference. The upper part of the valve rod adopts a packing pressing mode, and when the valve is worn and generates leakage after long-term use, the packing gland can be adjusted, so that the valve core always presses the valve seat to achieve a sealing effect. An elastic gasket is arranged between the lower end of the valve core and the bottom shaft, so that the valve core can always have upward thrust, and the friction torque between the valve core and the valve seat is reduced.
Description
Technical Field
The utility model relates to a plug valve, specific plug valve that can use under the high pressure difference that says so belongs to plug valve technical field.
Background
In the prior art, a plug valve utilizes a driving device to realize the lifting of a valve core and the compression of the valve core, so that the switching and resetting sealing of a switching valve are realized. The driving device comprises a motor and a transmission mechanism, and the reversing process of the switching valve is mainly realized by the transmission and conversion of the rotation of the motor through the transmission mechanism.
Among the prior art, there is a plug valve, cooperate with the valve rod through the uide bushing, realize the rotatory action of pushing down of valve rod, and then drive the case and rotate, the state that this kind of structure can conveniently realize the plug valve switches, moreover, the steam generator is simple in structure, the cost is lower, but because the rotation of valve rod goes on simultaneously when the action of pushing down, consequently when the valve rod rotates, can drive the case and rotate together, because the case is not totally detached from the contact with the inner wall of valve body yet this moment, consequently can and produce great friction between the valve body, not only can lead to drive power to increase greatly, and can lead to the wearing and tearing of case, under the long-term use, can seriously shorten the life of case, and then reduce the life of whole plug valve.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned weak point to a plug valve that can use under the high-pressure difference is provided, can guarantee that the case has an ascending thrust all the time, has reduced the friction torque between case and disk seat, has improved the life of plug valve.
According to the technical scheme provided by the utility model, a plug valve that can use under high pressure difference includes the valve body, be equipped with the valve rod hole of controlling the horizontal circulation hole that link up and vertically setting in the valve body, the downthehole valve rod that can the pivoted that is equipped with of valve rod, the case is connected to the valve rod lower extreme, during the horizontal circulation hole was vertically stretched into to the case, be equipped with the valve port that can communicate both sides horizontal circulation hole on the case, the downthehole disk seat that seals up the complex with the case that is equipped with of valve rod, the valve rod hole open end of valve body passes through connecting piece detachable and connects valve gap: a bottom shaft mounting hole is formed in the bottom of a valve rod hole of the valve body, a bottom shaft is fixed in the bottom shaft mounting hole, and the upper part of the bottom shaft extends into an inner cavity at the lower end of the valve core; an elastic gasket is arranged between the upper end surface of the bottom shaft and the lower end surface of the valve core, and the elastic gasket is upwards propped against the valve core; and an anti-blocking gasket is arranged between the lower end face of the valve cover and the upper end face of the valve core.
Furthermore, the valve rod and the valve core are integrally formed,
further, a shaft sleeve mounting step is arranged on the side face of the upper portion of the bottom shaft, a shaft sleeve is sleeved on the shaft sleeve mounting step, and the outer surface of the shaft sleeve is rotatably connected with the inner side face of the valve core.
Furthermore, a packing assembly is arranged between the valve cover and the valve rod, the upper end face of the valve cover is connected with a packing gland through a connecting piece, and the packing assembly is tightly pressed in the valve rod hole by the packing gland.
Compared with the prior art, the utility model has the advantages that:
the utility model discloses simple structure, compactness, reasonable adopts the mounting structure of bottom shaft under the valve stem, can guarantee that the case uses under the high-pressure difference. The upper part of the valve rod adopts a packing pressing mode, and when the valve is worn and generates leakage after long-term use, the packing gland can be adjusted, so that the valve core always presses the valve seat to achieve a sealing effect. An elastic gasket is arranged between the lower end of the valve core and the bottom shaft, so that the valve core can always have upward thrust, and the friction torque between the valve core and the valve seat is reduced.
Drawings
Fig. 1 is a front view half-section view of the utility model.
Description of reference numerals: 1-valve body, 2-valve rod, 3-valve core, 4-valve seat, 5-valve cover, 6-bottom shaft, 7-valve port, 8-shaft sleeve, 9-elastic gasket, 10-packing gland and 11-anti-blocking gasket.
Detailed Description
The invention will be further described with reference to the embodiments shown in the drawings to which:
as shown in fig. 1, the utility model discloses mainly including valve body 1, the horizontal opening that link up about being equipped with in the valve body 1 and the valve rod hole of vertical setting, the downthehole valve rod 2 that can the pivoted that is equipped with of valve rod, case 3, valve rod 2 and 3 integrated into one piece of case are connected to 2 lower extremes of valve rod.
The valve core 3 longitudinally extends into the transverse circulation holes, and a valve port 7 capable of communicating the transverse circulation holes on the two sides is arranged on the valve core 3. And a valve seat 4 which is in sealing fit with the valve core 3 is arranged in the valve rod hole.
When the valve is used, the valve core is controlled to rotate to a certain angle position, so that the valve port 7 can be communicated with the left transverse circulation hole and the right transverse circulation hole, and at the moment, the medium can normally circulate. The valve core is controlled to rotate to a certain angle position, so that the valve core cuts off the left and right transverse circulation holes, and at the moment, the medium is cut off.
The bottom of the valve rod hole of the valve body 1 is provided with a bottom shaft mounting hole, a bottom shaft 6 is fixed in the bottom shaft mounting hole, and the upper part of the bottom shaft 6 extends into the inner cavity at the lower end of the valve core 3.
The side surface of the upper part of the bottom shaft 6 is provided with a shaft sleeve mounting step, a shaft sleeve 8 is sleeved on the shaft sleeve mounting step, and the outer surface of the shaft sleeve 8 is rotatably connected with the inner side surface of the valve core 3.
Be equipped with elastic gasket 9 between 6 up end of bottom shaft and the lower terminal surface of case 3, elastic gasket 9 tightly case 3 in the top, elastic gasket 9 sets up and guarantees that case 3 has an ascending thrust all the time, has reduced the friction torque between case and disk seat for case 3 can be more convenient takes out, has also reduced the wearing and tearing of case 3 to disk seat 4, has improved the life of plug valve.
The valve rod hole open end of the valve body 1 is detachably connected with the valve cover 5 through a connecting piece, the packing assembly is arranged between the valve cover 5 and the valve rod 2, the upper end face of the valve cover 5 is connected with the packing gland 10 through the connecting piece, the packing gland 10 compresses the packing assembly in the valve rod hole, and the packing assembly can ensure that when the valve rod 2 rotates, a gap between the valve rod 2 and the valve cover 5 cannot be leaked by a medium.
An anti-blocking gasket 11 is arranged between the lower end face of the valve cover 5 and the upper end face of the valve core 3, and the anti-blocking gasket 11 can ensure that the valve core 2 is not scratched or blocked by the valve cover when rotating.
The utility model discloses a mounting structure of lower bottom shaft of last valve stem can guarantee that the case uses under the high-pressure difference. The upper part of the valve rod adopts a packing pressing mode, and when the valve is worn and generates leakage after long-term use, the packing gland can be adjusted, so that the valve core always presses the valve seat to achieve a sealing effect. An elastic gasket is arranged between the lower end of the valve core and the bottom shaft, so that the valve core can always have upward thrust, and the friction torque between the valve core and the valve seat is reduced.
Claims (4)
1. The utility model provides a plug valve that can use under high pressure difference, includes valve body (1), be equipped with about in valve body (1) horizontal circulation hole and the valve rod hole of vertical setting of lining up, valve rod (2) that can rotate are equipped with in the valve rod hole, and case (3) are connected to valve rod (2) lower extreme, case (3) vertically stretch into horizontal circulation hole, are equipped with valve port (7) that can feed through the horizontal circulation hole in both sides on case (3), the downthehole disk seat (4) that are equipped with case (3) seal fit of valve rod, valve rod hole open end of valve body (1) passes through connecting piece detachable and connects valve gap (5), characterized by: a bottom shaft mounting hole is formed in the bottom of a valve rod hole of the valve body (1), a bottom shaft (6) is fixed in the bottom shaft mounting hole, and the upper part of the bottom shaft (6) extends into an inner cavity at the lower end of the valve core (3); an elastic gasket (9) is arranged between the upper end face of the bottom shaft (6) and the lower end face of the valve core (3), and the elastic gasket (9) tightly pushes the valve core (3) upwards; an anti-clamping gasket (11) is arranged between the lower end face of the valve cover (5) and the upper end face of the valve core (3).
2. A plug valve capable of use at high differential pressures as claimed in claim 1 wherein: the valve rod (2) and the valve core (3) are integrally formed.
3. A plug valve capable of use at high differential pressures as claimed in claim 1 wherein: the side surface of the upper part of the bottom shaft (6) is provided with a shaft sleeve mounting step, a shaft sleeve (8) is sleeved on the shaft sleeve mounting step, and the outer surface of the shaft sleeve (8) is rotatably connected with the inner side surface of the valve core (3).
4. A plug valve capable of use at high differential pressures as claimed in claim 1 wherein: and a packing assembly is arranged between the valve cover (5) and the valve rod (2), the upper end surface of the valve cover (5) is connected with a packing gland (10) through a connecting piece, and the packing assembly is compressed in the valve rod hole by the packing gland (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921022544.2U CN210240621U (en) | 2019-07-02 | 2019-07-02 | Plug valve capable of being used under high pressure difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921022544.2U CN210240621U (en) | 2019-07-02 | 2019-07-02 | Plug valve capable of being used under high pressure difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210240621U true CN210240621U (en) | 2020-04-03 |
Family
ID=69989277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921022544.2U Active CN210240621U (en) | 2019-07-02 | 2019-07-02 | Plug valve capable of being used under high pressure difference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210240621U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427606A (en) * | 2022-03-04 | 2022-05-03 | 浙江东信阀门有限公司 | Plug valve |
-
2019
- 2019-07-02 CN CN201921022544.2U patent/CN210240621U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427606A (en) * | 2022-03-04 | 2022-05-03 | 浙江东信阀门有限公司 | Plug valve |
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