CN210715974U - Sealing structure of minimum flow valve bypass pipeline - Google Patents
Sealing structure of minimum flow valve bypass pipeline Download PDFInfo
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- CN210715974U CN210715974U CN201921868632.4U CN201921868632U CN210715974U CN 210715974 U CN210715974 U CN 210715974U CN 201921868632 U CN201921868632 U CN 201921868632U CN 210715974 U CN210715974 U CN 210715974U
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- bypass valve
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- minimum flow
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Abstract
The utility model provides a seal structure of minimum flow valve by pass line, including the by pass line body, the inside fixedly connected with bypass valve disk seat of by pass line body, bypass valve disk seat left side is connected with the bypass valve body, be provided with the bypass valve case between bypass valve disk seat and the bypass valve body, compare with prior art, the utility model discloses following beneficial effect has: through changing minimum flow valve by pass pipeline body valve body structure into spherical sealing by plane seal, sealing performance has been improved greatly, change by pass pipeline body valve body sealing form into sphere and conical surface contact by plane contact, improve the machining precision simultaneously and carry out surface finish and hardening treatment to sealed sphere and conical surface, improve the corrosion resistance of valve body, the resistance to scouring, the trafficability characteristic of fluid medium has been strengthened, make solid particle impurity be difficult for attaching to sealed face, valve body closing performance has been improved, and life.
Description
Technical Field
The utility model discloses a seal structure of minimum flow valve by pass pipeline belongs to the mechanical equipment field.
Background
The minimum flow valve is used as a protection device of the water pump, is arranged at the outlet of the water pump and protects the water pump from partial cavitation damage and instability which can occur in the pump body during low-load operation (particularly when hot water medium is conveyed). When the water pump is lower than the preset flow, the minimum flow valve bypass pipeline body valve is automatically opened to form minimum specified flow self-circulation for the water pump, and when the main path of the water pump is completely opened, the minimum flow valve bypass pipeline body is closed in time, so that the safe operation of the water pump is protected.
In the national economy fields of electric power, water conservancy, petrochemical industry, water supply, etc., the minimum flow valve is more and more widely used as the protection accessory device of water pump, and its effect in production operation is also more and more important. The water pump protection device is used as an auxiliary protection device of the water pump, and the performance of the water pump protection device directly influences the normal operation of the water pump. Once the water pump is in failure, the water pump is in operation failure, so that the whole water supply system is seriously affected, even the benefit loss is caused, the personal safety is damaged, the environment is polluted and the like.
In the application of the minimum flow valve, the problems that a main path is completely opened and the minimum flow valve bypass pipeline body valve is not closed tightly exist frequently, so that the operation efficiency and the safety of the whole water supply system are reduced. If the sealing performance of the bypass pipeline of the minimum flow valve can be improved, leakage is reduced, the maintenance period can be greatly reduced, and the efficiency is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a not enough that prior art exists, the utility model aims at providing minimum flow valve by pass line's seal structure to solve the problem that proposes in the above-mentioned background art, the utility model discloses a with by pass line body valve body structure by flat valve institutional advancement for spherical valve body structure, when having improved minimum flow valve main road and having opened completely, the sealing performance that closes of by pass line body valve has improved the life of valve body, reduces maintenance cycle.
In order to achieve the above purpose, the present invention is realized by the following technical solution: the sealing structure of the minimum flow valve bypass pipeline comprises a bypass pipeline body, a bypass valve seat is fixedly connected inside the bypass pipeline body, a bypass valve body is connected to the left side of the bypass valve seat, and a bypass valve spool is arranged between the bypass valve seat and the bypass valve body.
Furthermore, the valve core sealing surface of the bypass valve is of a spherical surface structure, a conical concave surface is processed on the valve seat sealing surface of the bypass valve, and the spherical sealing structure on the valve core of the bypass valve is arranged in the conical concave surface of the valve seat of the bypass valve in a matching manner.
Furthermore, the right side of the middle part of the bypass valve core is of a conical surface structure, a conical concave surface is processed on the left side of the bypass valve seat, and the conical surface structure on the bypass valve core is arranged in the conical concave surface on the left side of the bypass valve seat in a matched mode.
Furthermore, the spherical sealing surface of the valve core of the bypass valve and the conical sealing surface of the valve seat of the bypass valve are treated by adopting a hardening process and a polishing process.
Furthermore, the bypass valve core and the bypass valve seat are both made of manganese steel alloy.
The utility model has the advantages that: the utility model discloses a seal structure of minimum flow valve by pass pipeline, change into spherical sealing by planar seal through with minimum flow valve by pass pipeline body valve body structure, sealing performance has been improved greatly, change by pass pipeline body valve body sealing form into sphere and conical surface contact by planar contact, improve the machining precision simultaneously and carry out surface finish and hardening treatment to sealed sphere and conical surface, improve the corrosion resistance of valve body, the resistance to scouring, fluid medium's trafficability characteristic has been strengthened, make solid particle impurity be difficult for attaching to sealed face, valve body closing performance has been improved, and service life.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural view of a sealing structure of a minimum flow valve bypass pipeline of the present invention;
FIG. 2 is a block diagram of a flat valve body construction minimum flow valve bypass;
FIG. 3 is a flow chart of the system for using the sealing structure of the minimum flow valve bypass pipeline as a boiler feed pump protector of the present invention;
FIG. 4 is a schematic view of the assembly of the sealing structure of the minimum flow valve bypass pipe and the main valve body of the present invention;
in the figure: 1-main valve body, 2-by-pass pipeline body, 3-by-pass valve seat, 4-by-pass valve core, 5-by-pass valve body.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1 to 4, the present invention provides a technical solution: a sealing structure of a minimum flow valve bypass pipeline comprises a bypass pipeline body 2, a bypass valve seat 3 is fixedly connected inside the bypass pipeline body 2, a bypass valve body 5 is connected on the left side of the bypass valve seat 3, a bypass valve spool 4 is arranged between the bypass valve seat 3 and the bypass valve body 5, in order to prevent overheating and cavitation of a feed water pump, the flow of the feed water pump must not be smaller than a certain specified safety flow under any condition, namely the minimum flow, as shown in figure 3, the minimum flow valve is used as an auxiliary protection device in a boiler feed water pump system, when a main path of normal operation of the water pump is completely opened to supply water to the outside, the bypass of the minimum flow valve is closed, when the water pump is not normally operated to supply water to the outside, the main path of the minimum flow valve is closed, the bypass of the minimum flow valve is opened, thereby protecting the water pump, guarantee normal continuous operation of water pump, change into spherical sealing by plane seal through 2 valve body structures of minimum flow valve by-pass pipeline body, sealing performance has been improved greatly, change 2 valve body sealing forms of by-pass pipeline body into sphere and conical surface contact by plane contact, improve the machining precision simultaneously and carry out surface finish and hardening treatment to sealed sphere and conical surface, improve the corrosion resistance of valve body, the resistance to scouring, the trafficability characteristic of fluid medium has been strengthened, make solid particle impurity be difficult for attaching to sealed face, valve body closing performance has been improved, and life.
The sealing surface of the by-pass valve core 4 is in a spherical surface structure, the sealing surface of the by-pass valve seat 3 is processed with a conical concave surface, and the spherical sealing structure on the by-pass valve core 4 is arranged in the conical sealing concave surface of the by-pass valve seat 3 in a matching way, so that the purpose of spherical sealing is realized.
The right side of the middle part of the bypass valve core 4 is of a conical surface structure, the left side of the bypass valve seat 3 is processed with a conical concave surface, and the conical surface structure on the bypass valve core 4 is arranged in the conical concave surface on the left side of the bypass valve seat 3 in a matching mode, so that the purpose of conical surface sealing is achieved.
The spherical sealing surface of the by-pass valve core 4 and the conical sealing surface of the by-pass valve seat 3 are treated by adopting a hardening process and a polishing process, so that the corrosion resistance and the scouring resistance of the by-pass valve core 4 and the by-pass valve seat 3 are improved, and the permeability of fluid media is enhanced.
The bypass valve core 4 and the bypass valve seat 3 are made of manganese steel alloy, so that the strength and the elastic stability of the bypass valve core 4 and the bypass valve seat 3 are improved, the deformation caused by stress is avoided, and the stability is high.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (5)
1. Minimum flow valve by pass seal structure of pipeline, including by pass pipeline body, its characterized in that: the bypass valve comprises a bypass pipeline body and is characterized in that a bypass valve seat is fixedly connected inside the bypass pipeline body, a bypass valve body is connected to the left side of the bypass valve seat, and a bypass valve spool is arranged between the bypass valve seat and the bypass valve body.
2. The minimum flow valve bypass conduit seal arrangement of claim 1, wherein: the valve core sealing surface of the bypass valve is of a spherical surface structure, a conical concave surface is processed on the valve seat sealing surface of the bypass valve, and the spherical sealing structure on the valve core of the bypass valve is arranged in the conical concave surface of the valve seat of the bypass valve in a matching manner.
3. The minimum flow valve bypass conduit seal arrangement of claim 1, wherein: the right side of the middle part of the bypass valve core is of a conical surface structure, a conical concave surface is processed on the left side of the bypass valve seat, and the conical surface structure on the bypass valve core is arranged in the conical concave surface on the left side of the bypass valve seat in a matched mode.
4. The minimum flow valve bypass conduit seal arrangement of claim 1, wherein: the spherical sealing surface of the valve core of the bypass valve and the conical sealing surface of the valve seat of the bypass valve are both treated by adopting a hardening process and a polishing process.
5. The minimum flow valve bypass conduit seal arrangement of claim 1, wherein: the bypass valve core and the bypass valve seat are both made of manganese steel alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921868632.4U CN210715974U (en) | 2019-10-31 | 2019-10-31 | Sealing structure of minimum flow valve bypass pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921868632.4U CN210715974U (en) | 2019-10-31 | 2019-10-31 | Sealing structure of minimum flow valve bypass pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210715974U true CN210715974U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921868632.4U Active CN210715974U (en) | 2019-10-31 | 2019-10-31 | Sealing structure of minimum flow valve bypass pipeline |
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| Country | Link |
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| CN (1) | CN210715974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464714A (en) * | 2021-08-02 | 2021-10-01 | 九通集团有限公司 | Pump export minimum flow valve |
-
2019
- 2019-10-31 CN CN201921868632.4U patent/CN210715974U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464714A (en) * | 2021-08-02 | 2021-10-01 | 九通集团有限公司 | Pump export minimum flow valve |
| CN113464714B (en) * | 2021-08-02 | 2023-02-24 | 九通集团有限公司 | Pump export minimum flow valve |
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