CN216768428U - Double-valve-seat ball valve - Google Patents
Double-valve-seat ball valve Download PDFInfo
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- CN216768428U CN216768428U CN202220158472.XU CN202220158472U CN216768428U CN 216768428 U CN216768428 U CN 216768428U CN 202220158472 U CN202220158472 U CN 202220158472U CN 216768428 U CN216768428 U CN 216768428U
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Abstract
The utility model belongs to the technical field of valves, and discloses a double-valve-seat ball valve which comprises a main valve body, wherein a cavity is arranged in the main valve body, a ball core is connected in the cavity in a sealing and rotating manner, valve ends are symmetrically arranged at the left end and the right end of the main valve body, a valve seat assembly for sealing the valve core is arranged in the valve end, the valve seat assembly comprises a main valve seat and an auxiliary valve seat, the auxiliary valve seat is positioned on the outer ring of the main valve seat, a plurality of main spring groups are circumferentially arranged between the main valve seat and the valve end, the main valve seat is pressed on the valve core under the pressure action of the main spring groups, a plurality of auxiliary spring groups are circumferentially arranged between the auxiliary valve seat and the valve end, and the auxiliary valve seat is pressed on the valve core under the pressure action of the auxiliary spring groups; through the double-sealing matching effect of the main valve seat and the auxiliary valve seat on the valve core, when the main valve seat firstly plays a main sealing effect, the auxiliary valve seat does not play a role so as to reduce the abrasion of the main valve seat and prolong the service life of the main valve seat, and the purpose of double-safety of double-sealing relay is achieved.
Description
Technical Field
The utility model belongs to the technical field of valves, and particularly relates to a double-valve-seat ball valve.
Background
The ball valve is driven by the valve rod and rotates around the axis of the ball valve. The hard seal V-shaped ball valve can also be used for regulating and controlling fluid, wherein a V-shaped ball core of the hard seal V-shaped ball valve has strong shearing force with a metal valve seat of the surfacing hard alloy, and the hard seal V-shaped ball valve is particularly suitable for media containing fibers, tiny solid particles and the like. The multi-way ball valve can flexibly control the confluence, the diversion and the switching of the flow direction of the medium on the pipeline, and can close any channel to connect the other two channels. The valve should be generally installed horizontally in the pipeline.
In the long-term use process of the ball valve, the sealing performance, the quick maintainability, the service life and the like are critical to the quality index of the valve, and particularly, after a medium enters a gap between the valve core and the valve seat, the outer surface of the valve core is abraded in the rotation process of the valve core, so that the outer surface of the valve core is deformed, the sealing problem is caused, and the service life is shortened.
Disclosure of Invention
The utility model aims to provide a double-valve-seat ball valve; the technical scheme adopted for achieving the purpose is as follows:
a double-valve-seat ball valve comprises a main valve body, wherein a cavity is arranged in the main valve body, a ball core is connected in the cavity in a sealing and rotating mode, a valve rod is connected to the ball core, the valve rod is connected with the main valve body in a rotating mode and extends out of the main valve body, valve ends are symmetrically arranged on the left end and the right end of the main valve body, the valve core rotates to open and close between the valve ends at the two ends, a valve seat assembly used for sealing the valve core is arranged in the valve end and comprises a main valve seat and an auxiliary valve seat, the auxiliary valve seat is located on the outer ring of the main valve seat, a plurality of main spring groups are arranged between the main valve seat and the valve end in the circumferential direction, the main valve seat is pressed on the valve core under the pressure effect of the main spring groups, and a plurality of auxiliary spring groups are arranged between the auxiliary valve seat and the valve end in the circumferential direction, and the auxiliary valve seat is pressed on the valve core under the pressure effect of the auxiliary spring groups.
Preferably, the main valve seat and the valve end, and the auxiliary valve seat and the valve end are in sealing sliding connection, and sealing rings are sleeved on the main valve and the auxiliary valve seat.
Preferably, the preset elastic force of the main spring set is greater than the preset elastic force of the auxiliary spring set.
Preferably, the main valve seat and the auxiliary valve seat are integrally formed, and when the sealing end face of the main valve seat is pressed on the valve core, a gap is formed between the sealing end face of the auxiliary valve seat and the valve core.
Preferably, the valve rod is connected with the ball core through a spline, and a hand wheel is installed at the outer end part of the valve rod.
The utility model has the following beneficial effects: according to the double-seal matching effect of the main valve seat and the auxiliary valve seat on the valve core, when the main valve seat plays a main sealing effect, the auxiliary valve seat does not play a role so as to reduce the abrasion of the main valve seat and prolong the service life of the main valve seat; when the sealing effect of the main valve seat is in problem, the auxiliary valve seat plays a main sealing role again, and the purpose of double-sealing relay double-insurance is achieved.
On the other hand, the original connection between the valve rod and the valve core adopts square matching, the stress is uneven, after the valve is used for a period of time, the abrasion gap is too large, and the problem that the valve cannot be opened or closed is caused; the valve rod and the ball core are connected in a matched mode through the spline, and the hand wheel is arranged at the outer end of the valve rod, so that the switch is uniformly stressed and is reliable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a double-seat ball valve comprises a main valve body 9, a chamber is arranged in the main valve body 9, a ball core 12 is connected in the chamber in a sealing and rotating manner, a valve rod 10 is connected on the ball core 12, the valve rod 10 is connected with the main valve body 9 in a rotating manner and extends out of the main valve body 9, valve ends 8 are symmetrically arranged at the left end and the right end of the main valve body 9, the valve core 12 rotates to realize opening and closing between the valve ends 8 at the two ends, a valve seat assembly used for sealing the valve core 12 is arranged in the valve end 8, the valve seat assembly comprises a main valve seat 6 and an auxiliary valve seat 4, wherein the auxiliary valve seat 4 is positioned at the outer ring of the main valve seat 6, a plurality of main spring groups 7 are arranged between the main valve seat 6 and the valve end 8 around the circumferential direction, the main valve seat 6 is pressed against the valve core 12 under the pressure of the main spring groups 7, a plurality of auxiliary spring groups 3 are arranged between the auxiliary valve seat 4 and the valve end 8 around the circumferential direction, under the pressure of the secondary spring group 3, the secondary valve seat 4 is pressed against the valve core 12.
In order to ensure the sealing performance between the main valve seat 6, the auxiliary valve seat 4 and the valve end 8, the main valve seat 6 and the valve end 8 and the auxiliary valve seat 4 and the valve end 8 are in sealing sliding connection, and the main sealing ring 2 and the auxiliary sealing ring 1 are sleeved on the main valve seat 6 and the auxiliary valve seat 4.
The preset elastic force of the main spring group 7 is greater than the preset elastic force of the auxiliary spring group 3, so that the main valve seat 6 firstly plays a main sealing role, and when the sealing effect of the main valve seat 6 goes wrong, the auxiliary valve seat 4 plays a main sealing role again, and the purpose of double sealing and double safety is achieved.
In another embodiment, the main valve seat 6 and the auxiliary valve seat 4 may also be integrally formed, and when the sealing end face of the main valve seat 6 is pressed against the valve core 12, a gap is provided between the sealing end face of the auxiliary valve seat 4 and the valve core 12, so that when the main valve seat 6 first performs the main sealing function, the auxiliary valve seat 4 does not function to reduce the wear of the main valve seat and increase the service life of the main valve seat; when the sealing effect of the main valve seat 6 is in failure, the auxiliary valve seat 4 plays a main sealing role again, and the purpose of double safety of double sealing relay is achieved.
On the other hand, the original connection between the valve rod and the valve core adopts square cooperation, the stress is uneven, after the valve is used for a period of time, the abrasion gap is too large, and the problem that the valve cannot be opened or closed is caused. Therefore, the valve rod 10 is connected with the ball core 12 in a matching way through the spline 13, and the hand wheel 11 is arranged at the outer end part of the valve rod 10, so that the switch is uniformly stressed and is reliable.
As shown in fig. 1 and fig. 2, a pouring hole is provided on the main valve body 9 or the valve tip 8, an inner channel 5 communicated with the pouring hole is provided on the main valve seat 6, since the sealing surface of the main valve seat 6 is an embedded soft seal (made of tetrafluoroethylene or nylon), a grease injection valve is installed outside the pouring hole of the main valve seat 6; when a pipeline is on fire, the sealing material is burnt, so that the sealing effect is lost, the soft seal of the main valve seat 6 fails, sealing grease can be injected from the grease injection valve outside the pouring hole, and the sealing grease flows to the sealing position of the main valve seat 6 and the ball core 12 through the grease injection valve-pouring hole-inner channel 5 to temporarily play a role in sealing.
In the use process of the utility model, the valve rod 10 is repeatedly rotated back and forth to drive the valve core 12 to rotate so as to realize the opening and closing between the valve end heads 8 at the two ends, firstly, the main valve seat 6 plays a sealing role on the valve core 12, and when the main valve seat 6 is worn in a sealing way, the auxiliary valve seat 4 plays a main sealing role again, thereby achieving the purpose of double-sealing relay double insurance, ensuring that the sealing performance of the ball valve is more reliable and the service life of the ball valve is longer.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A double-valve-seat ball valve comprises a main valve body, wherein a cavity is arranged in the main valve body, a ball core is connected in the cavity in a sealing and rotating mode, a valve rod is connected to the ball core, the valve rod is connected with the main valve body in a rotating mode and extends out of the main valve body, valve end heads are symmetrically arranged on the left end and the right end of the main valve body, and the valve core rotates to open and close between the valve end heads at the two ends.
2. A double seat ball valve according to claim 1, wherein the primary valve seat and the valve end, and the secondary valve seat and the valve end are sealingly slidably connected, and wherein sealing rings are fitted over the primary valve seat and the secondary valve seat.
3. The dual seat ball valve of claim 1, wherein the predetermined spring force of the main spring set is greater than the predetermined spring force of the secondary spring set.
4. A double seat ball valve according to claim 1, wherein the primary valve seat and the secondary valve seat are integrally formed, and a gap is provided between the sealing end face of the secondary valve seat and the valve element when the sealing end face of the primary valve seat is pressed against the valve element.
5. A double-seat ball valve according to any one of claims 1 to 4, wherein the valve rod and the ball core are connected through splines, and a hand wheel is mounted at the outer end of the valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220158472.XU CN216768428U (en) | 2022-01-21 | 2022-01-21 | Double-valve-seat ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220158472.XU CN216768428U (en) | 2022-01-21 | 2022-01-21 | Double-valve-seat ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216768428U true CN216768428U (en) | 2022-06-17 |
Family
ID=81979762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220158472.XU Active CN216768428U (en) | 2022-01-21 | 2022-01-21 | Double-valve-seat ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216768428U (en) |
-
2022
- 2022-01-21 CN CN202220158472.XU patent/CN216768428U/en active Active
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