CN211693570U - High-pressure stop type throttle valve - Google Patents
High-pressure stop type throttle valve Download PDFInfo
- Publication number
- CN211693570U CN211693570U CN202020073782.2U CN202020073782U CN211693570U CN 211693570 U CN211693570 U CN 211693570U CN 202020073782 U CN202020073782 U CN 202020073782U CN 211693570 U CN211693570 U CN 211693570U
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- valve
- cover
- sealing surface
- throttle
- clack
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Abstract
The utility model relates to a high-pressure stop throttle valve, which comprises a valve body and a throttle cover; a valve cover is hermetically arranged above the valve body, the valve cover is provided with a stuffing box, and a stuffing pad, stuffing and a stuffing pressing sleeve are arranged in the stuffing box; the packing pressing plate compresses the packing in the packing box to seal the valve cover and the valve rod; the throttle cover is positioned in the valve body and is tightly matched with the valve body; the valve clack is arranged in the throttling cover, a gland is arranged on the upper portion of the valve clack to assemble the valve clack and the valve rod into a whole, and a cavitation-resistant groove is arranged on the lower portion of a sealing surface of the valve clack; and a hand wheel is installed at the top of the valve rod, and the hand wheel is rotated to drive the valve rod to move up and down. The utility model has simple structure and convenient installation, and improves the assembly efficiency of the pipeline; the anti-cavitation groove is arranged near the valve clack sealing surface, so that cavitation erosion at the sealing surface is prevented from damaging the sealing surface, and the service life is prolonged; the surface of the throttling cover is hardened and more corrosion-resistant, and the throttling cover is detachably arranged.
Description
Technical Field
The utility model relates to a pipeline choke valve technical field, in particular to high pressure stop type choke valve.
Background
A throttle valve is a device for throttling a medium by changing the cross-sectional area of a passage to regulate the flow and pressure of the medium. The performance requirements on the throttle valve are generally three points, firstly, the flow regulation range is large, and the flow-pressure difference change is smooth; secondly, the internal leakage amount is small, and if an external leakage oil port exists, the external leakage amount is small; thirdly, the adjusting moment is small and the action is sensitive.
The throttle valve used in electric power and petroleum pipeline system has relatively large torque ratio when closed, serious cavitation and great noise when the valve is in small opening degree because of the consistent angle of the sealing surface. There is therefore a need for a throttle valve that prevents severe cavitation of the sealing surfaces.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high pressure stop type throttle valve for solving the technical problems existing in the prior art, which has simple structure, and the lower part of the sealing surface of the valve clack is provided with an anti-cavitation groove to avoid the damage of the sealing surface; the throttling cover of the throttling valve is replaceable, and the surface of the throttling cover is hardened, so that the service life of equipment is prolonged.
The utility model comprises the following technical scheme: a high-pressure stop type throttle valve comprises a valve body and a throttle cover; a valve cover is hermetically arranged above the valve body, the valve cover is provided with a stuffing box, and a stuffing pad, stuffing and a stuffing pressing sleeve are arranged in the stuffing box; the packing pressing plate compresses the packing in the packing box to seal the valve cover and the valve rod; the throttle cover is positioned in the valve body and is tightly matched with the valve body; the valve clack is arranged in the throttling cover, a gland is arranged on the upper portion of the valve clack to assemble the valve clack and the valve rod into a whole, and a cavitation-resistant groove is arranged on the lower portion of a sealing surface of the valve clack; and a hand wheel is installed at the top of the valve rod, and the hand wheel is rotated to drive the valve rod to move up and down.
Preferably, an opening flow channel is arranged in the middle of the throttling cover, and meanwhile, the surface of the throttling cover is hardened to improve the corrosion resistance of the throttling cover.
Preferably, the throttle cover is detachably mounted inside the valve body, so that the throttle cover is convenient to replace.
Preferably, a sealing gasket is arranged at the shoulder of the lower part of the throttling cover, and a sealing gasket is arranged below the valve cover. The sealing surfaces are all in a linear sealing mode, so that the operation torque is reduced, and the action is more sensitive.
Preferably, the sealing of the valve body and the valve cover is realized by pre-tightening a valve cover bolt and a nut.
Preferably, the installation of the packing press plate is realized by pre-tightening a swing bolt nut.
Preferably, the angle of the valve clack sealing surface is different from that of the throttle cover sealing surface, and a gap is reserved between the valve clack sealing surface and the throttle cover sealing surface.
Preferably, the hand wheel is pressed and installed on the top of the valve rod through a nut.
The utility model has the advantages and positive effect:
1. the utility model discloses a near the sealed face of valve clack is provided with the recess of anti-cavitation erosion, prevents that sealed face department from taking place cavitation erosion, damages sealed face, has prolonged the life of equipment.
2. The utility model discloses a throttle mask surface has carried out the sclerosis and has handled more corrosion-resistant, and the throttle mask is demountable installation, is convenient for change.
3. The utility model discloses a sealed face all adopts the sealed form of line, has reduced the operating torque moment, and the action is more sensitive.
4. The utility model discloses simple structure, simple to operate has improved the packaging efficiency of pipeline.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic sectional view of the present invention.
Fig. 3 is a valve clack diagram adopted by the utility model.
In the figure, 1-valve body; 2-a gasket; 3-a throttle cover; 4-valve clack; 5-pressing the cover; 6-a gasket; 7-valve cover; 8-valve stem; 9-a packing pad; 10-a filler; 11-packing and pressing; 12-articulating bolt and nut; 13-a valve stem nut; 14-a hand wheel; 15-a nut; 16-a caulk plate; 17-bonnet bolt and nut.
Detailed Description
To further disclose the contents, features and functions of the present invention, the following examples are given in detail with reference to the accompanying drawings.
Example (b): as shown in fig. 1, a high-pressure stop type throttle valve includes a valve body 1 and a throttle cover 3; the valve body 1 is provided with a valve cover 7 in a sealing mode, and the valve body 1 and the valve cover 7 are sealed through pre-tightening of a valve cover bolt and a nut 17.
As shown in fig. 2-3, the throttle cover 3 is located inside the valve body 1 and is tightly fitted with the valve body 1; the throttling cover 3 is detachably arranged in the valve body 1, a sealing gasket 2 is arranged at the lower circular bead of the throttling cover 3, and an opening flow channel is arranged in the middle of the throttling cover 3; and a sealing gasket 6 is arranged below the valve cover 7. The throttle cover 3 is internally provided with a valve clack 4. The valve clack 4 is provided with a gland 5 through the upper part to assemble the valve clack 4 and the valve rod 8 into a whole. The lower part of the sealing surface of the valve clack 4 is provided with a cavitation erosion prevention groove; the angle of the sealing surface of the valve clack 4 is different from that of the sealing surface of the throttle cover 3, and a gap is reserved between the sealing surface of the valve clack 4 and the sealing surface of the throttle cover 3.
The valve cover 7 is provided with a stuffing box, and a stuffing pad 9, a stuffing 10 and a stuffing pressing sleeve 11 are arranged in the stuffing box; the packing pressing plate 16 compresses the packing 10 in the packing box, the installation of the packing pressing plate 16 is realized by pre-tightening the movable joint bolt and the nut 12, and the valve cover 7 and the valve rod 8 are sealed; a hand wheel 14 is installed at the top of the valve rod 8, the hand wheel 14 is tightly pressed and installed through a nut 15 at the top of the valve rod 8, and the valve rod 8 is driven by the hand wheel 14 to move up and down.
The working principle is as follows: an anti-cavitation groove is arranged at the lower part of a closing part (namely a valve clack) of the throttle valve, so that cavitation erosion is prevented from being generated at a sealing surface of the valve; the throttle valve controls the medium flow area to meet the throttling requirement by adjusting the stroke of the valve closing piece.
Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention. All of which fall within the scope of the present invention.
Claims (8)
1. The high-pressure stop type throttle valve comprises a valve body and a throttle cover, and is characterized in that: a valve cover is hermetically arranged above the valve body, the valve cover is provided with a stuffing box, and a stuffing pad, stuffing and a stuffing pressing sleeve are arranged in the stuffing box; the packing pressing plate compresses the packing in the packing box to seal the valve cover and the valve rod; the throttle cover is positioned in the valve body and is tightly matched with the valve body; the valve clack is arranged in the throttling cover, a gland is arranged on the upper portion of the valve clack to assemble the valve clack and the valve rod into a whole, and a cavitation-resistant groove is arranged on the lower portion of a sealing surface of the valve clack; and a hand wheel is installed at the top of the valve rod, and the hand wheel is rotated to drive the valve rod to move up and down.
2. The high-pressure stop-type throttle valve according to claim 1, characterized in that: an opening flow channel is arranged in the middle of the throttling cover.
3. The high-pressure stop-type throttle valve according to claim 2, characterized in that: the throttle cover is detachably mounted inside the valve body.
4. The high-pressure stop-type throttle valve according to claim 3, characterized in that: a sealing gasket is arranged at the lower shoulder of the throttle cover, and a sealing gasket is arranged below the valve cover.
5. The high-pressure stop-type throttle valve according to claim 4, characterized in that: the sealing of the valve body and the valve cover is realized by pre-tightening a valve cover bolt and a nut.
6. The high-pressure stop-type throttle valve according to claim 1, characterized in that: the installation of the packing press plate is realized by pre-tightening a movable joint bolt and a nut.
7. The high-pressure stop-type throttle valve according to claim 1, characterized in that: the angle of the sealing surface of the valve clack is different from that of the sealing surface of the throttling cover, and a gap is reserved between the sealing surface of the valve clack and the sealing surface of the throttling cover.
8. The high-pressure stop-type throttle valve according to claim 1, characterized in that: the hand wheel is pressed tightly through a nut and is installed on the top of the valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020073782.2U CN211693570U (en) | 2020-01-14 | 2020-01-14 | High-pressure stop type throttle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020073782.2U CN211693570U (en) | 2020-01-14 | 2020-01-14 | High-pressure stop type throttle valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211693570U true CN211693570U (en) | 2020-10-16 |
Family
ID=72771558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020073782.2U Active CN211693570U (en) | 2020-01-14 | 2020-01-14 | High-pressure stop type throttle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211693570U (en) |
-
2020
- 2020-01-14 CN CN202020073782.2U patent/CN211693570U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |