CN220706456U - Pressure balance type plug valve - Google Patents
Pressure balance type plug valve Download PDFInfo
- Publication number
- CN220706456U CN220706456U CN202322368812.9U CN202322368812U CN220706456U CN 220706456 U CN220706456 U CN 220706456U CN 202322368812 U CN202322368812 U CN 202322368812U CN 220706456 U CN220706456 U CN 220706456U
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- plug valve
- valve core
- pressure balance
- plug
- cavity
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- 230000007246 mechanism Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 210000004919 hair shaft Anatomy 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a pressure balance type plug valve, which comprises a valve body, a plug valve core and a valve rod, wherein an end cover is arranged at the bottom opening of the valve body, an inner cavity is arranged in the valve body, the plug valve core and the inner cavity are in a conical shape with a small upper part and a big lower part, the plug valve core is arranged in the inner cavity and separates the inner cavity into an upper cavity and a lower cavity, and a flow channel which is communicated with the upper cavity and the lower cavity is arranged on the plug valve core; one end of the valve rod is connected with the plug valve core; the top and the bottom of cock case are provided with first buffer gear and second buffer gear respectively, through this setting, have greatly increased the stability of cock case position, avoid the emergence of the dead problem of lock that pressure differential caused.
Description
Technical Field
The application relates to the technical field of plug valves, in particular to a pressure balance type plug valve.
Background
The pressure balance plug valve is provided with through holes which are respectively communicated with pressure balance cavities at the top end and the bottom end at the flow passage of the conical plug valve core. When the pressure in the valve body pipeline enters the cock runner, the conical cock valve core is pushed upwards under the action of pressure difference, so that conical surface seal is formed. However, this seal will create a cone lock, resulting in seizure. To solve the problem, the conventional plug valve adopts a mode of injecting grease outside the top for balancing the upward thrust, but the problem of locking the conical surface cannot be thoroughly avoided.
Meanwhile, under the action of axial force caused by pressure difference, the plug valve core frequently rubs with the valve cover and the valve body, so that friction loss between the plug valve core and the valve body or the shaft sleeve is easy to occur, the time is long, and the sealing effect is irreversibly reduced.
Disclosure of Invention
Aiming at the problems, the application provides a pressure balance type plug valve, and the utility model helps to dynamically adjust the axial position of a plug valve core by arranging buffer mechanisms at the top end and the bottom end of a traditional plug valve core, so that the plug valve core locking phenomenon generated under the condition of overlarge medium pressure difference of the plug valve core can be prevented to a great extent; the pressure balance type plug valve is specifically realized by the following technical scheme:
the pressure balance type plug valve comprises a valve body, a plug valve core and a valve rod, wherein an end cover is arranged at the bottom opening of the valve body, an inner cavity is arranged in the valve body, the plug valve core and the inner cavity are in a conical shape with a small upper part and a big lower part, the plug valve core is arranged in the inner cavity and divides the inner cavity into an upper cavity and a lower cavity, and a flow channel which is communicated with the upper cavity and the lower cavity is arranged on the plug valve core; one end of the valve rod is connected with the plug valve core; the method is characterized in that: the top and the bottom of the plug valve core are respectively provided with a first buffer mechanism and a second buffer mechanism.
The valve is characterized in that the top of the plug valve core is provided with a square lug, one end of the valve rod is provided with a square slot matched with the square lug, and the plug valve core is axially movably connected with the valve rod and circumferentially fixedly connected with the valve rod through the valve.
Further set up, first buffer gear includes first spring, square lug's one end is equipped with spacing recess, first spring sets up in the spacing recess, the one end of first spring is acted on spacing recess inner, the other end is acted on square fluting inner, through this setting, makes the cock case avoids the lock to die.
The second buffer mechanism comprises a second spring, an annular limit flange is arranged at the bottom of the plug valve core, and the inner diameter of the limit flange is matched with the diameter of the second spring; the second spring is arranged in the lower cavity, one end of the pretightening force of the second spring acts on the bottom end of the plug valve core, the other end of the pretightening force acts on the end cover, and through the arrangement, the plug valve core is more stable in position and further prevented from being locked.
Further set up, the valve rod periphery is provided with the valve rod spacing groove, the double open ring is installed through the fastener to the valve body upper end, be provided with on the double open ring with the valve rod spacing flange of valve rod spacing groove looks adaptation, through this setting, inject the valve rod position, make overall structure stable.
Further set up, the seal groove of coaxial with the valve rod has been seted up to the valve body upper end, the seal groove is embedded to be equipped with the filler, the inner of double open loop is equipped with and is used for with the packing compresses tightly the flange that compresses tightly in the seal groove, through this setting, makes overall structure inseparabler.
The device is further provided with a one-way switch in the flow channel, and the one-way switch only allows media to be communicated from the lower cavity of the plug valve core to the upper cavity, and through the device, the pressure of the upper cavity is maintained.
The valve plug is characterized in that a first groove and a second groove are formed in the contact surface between the upper end and the lower end of the valve plug and the valve body respectively, a first sealing ring and a second sealing ring are arranged in the first groove and the second groove respectively, and through the arrangement, the sealing performance of the valve plug in the use process is improved.
The support shaft is arranged at the inner end of the end cover and is in running fit with the bottom end of the plug valve core, and the whole structure is more stable through the arrangement.
In summary, the pressure balance type plug valve improves the position stability of the plug valve core in the use process by arranging the buffer mechanisms at the top end and the bottom end of the plug valve core respectively, so that the problem of plug valve core locking caused by displacement is avoided to a great extent; meanwhile, the sealing ring is arranged on the contact surface of the plug valve core and the valve body, so that the sealing performance of the plug valve core is further enhanced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front cross-sectional view of a pressure balanced plug valve provided in an embodiment of the present application;
FIG. 2 is a left and right isometric view of a pressure balanced faucet spool provided in an embodiment of the present application;
FIG. 3 is a front view of a pressure balanced plug provided in an embodiment of the present application;
FIG. 4 is an enlarged view of portion A of FIG. 1 of a pressure balanced faucet valve according to an embodiment of the present application;
FIG. 5 is an enlarged view of portion B of FIG. 1 of a pressure balanced faucet valve according to an embodiment of the present application;
fig. 6 is an enlarged view of section C of fig. 1 of a pressure balanced faucet valve according to an embodiment of the present application.
Wherein, each reference sign in the figure:
1. a valve body; 2. a plug valve core; 3. a valve stem; 4. an end cap; 5. an upper chamber; 6. a lower cavity; 7. a flow passage; 8. a first buffer mechanism; 9. a second buffer mechanism; 10. square protruding blocks; 11. square slotting; 12. a first spring; 13. a limit groove; 14. a second spring; 15. an annular limit flange; 16. a valve rod limit groove; 17. double open loop; 18. a valve stem limit flange; 19. a filler; 20. sealing grooves; 21. a one-way switch; 22. a first slot; 23. a second slot; 24. a first seal ring; 25. a second seal ring; 26. a support shaft; 27. pressing the flange.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The present application will now be further described with reference to the accompanying drawings and detailed description:
referring to fig. 1 to 6, a pressure balance plug valve comprises a valve body 1, a plug valve core 2 and a valve rod 3, wherein an end cover 4 is arranged at the bottom opening of the valve body 1, an inner cavity is arranged in the valve body 1, the plug valve core 2 and the inner cavity are in a conical shape with a small upper part and a big lower part, the plug valve core 2 is arranged in the inner cavity and divides the inner cavity into an upper cavity 5 and a lower cavity 6, and a flow passage 7 which is communicated with the upper cavity 5 and the lower cavity 6 is arranged on the plug valve core 2; one end of the valve rod 3 is connected with the plug valve core 2; the method is characterized in that: the top and the bottom of the plug valve core 2 are respectively provided with a first buffer mechanism 8 and a second buffer mechanism 9.
Referring to fig. 2 and 3, in this embodiment, a square protrusion 10 is provided on the top of the plug valve core 2 and is used for being embedded with a square groove at the bottom of the valve rod 3, and the square shape is convenient to process and has a certain strength, and in addition, a triangle shape, a polygon shape and an irregular convex shape can be adopted, but care should be taken to ensure that the plug valve core 2 is connected with the hair shaft, is movably connected in the axial direction, and is fixedly connected in the circumferential direction, so as to ensure that the valve rod 3 can drive the plug valve core 2 to rotate; the contact surfaces of the upper end and the lower end of the plug valve core 2 and the valve body 1 are respectively provided with a first slot 22 and a second slot 23, the first slot 22 and the second slot 23 are respectively provided with a first sealing ring 24 and a second sealing ring 25, and the sizes of the first sealing ring 24 and the second sealing ring 25 are slightly larger than those of the first slot 22 and the second slot 23, so that the sealing rings are embedded in the slots.
Referring to fig. 4, in this embodiment, the top of the plug 2 is provided with a first buffer mechanism 8, which includes a first spring 12, where one end of the pre-tightening force of the first spring 12 acts on the inner end of the limit groove 13, and the other end acts on the inner end of the square slot 11, and it should be noted that the pre-tightening force of the first spring 12 and the tightening force need to be adjusted according to different sizes of the plug 2, different usage scenarios, and different media, and it should be noted that the pre-tightening force of the first spring 12 of the first buffer mechanism 8 needs to be achieved, so that not only slight displacement of the plug 2 is allowed, but also self-sealing surface is generated, and locking problem of the plug 2 caused by excessive displacement needs to be prevented.
Referring to fig. 5, in this embodiment, the bottom of the plug valve core 2 is provided with a second buffer mechanism 9, including a second spring 14, the limit mode of the second spring 14 is slightly different from that of the first spring 12, the bottom of the plug valve core 2 is provided with an annular limit flange 15 adapted to the second spring 14, one end of the pretightening force of the second spring 14 acts on the bottom end of the plug valve core 2, and the other end acts on the end cover 4, and it is to be noted that the buffer mechanisms are provided at the upper and lower ends of the plug valve core 2, so as to enhance the stability of the position of the plug valve core 2 under the condition of having a certain dynamic capability, and when the medium pressure is too high, the plug valve core 2 can buffer the pressure by means of the buffer mechanism under the instant impact, and at the same time, the position can be adjusted to return to the normal state.
Referring to fig. 6, in this embodiment, a stem limit groove 16 is provided on the outer periphery of the stem 3, a double open ring 17 is installed at the upper end of the valve body 1 through a fastener, a stem limit flange 18 adapted to the stem limit groove 16 is provided on the double open ring 17, and the setting of the limit device allows the circumferential rotation of the stem 3, but limits the axial displacement distance of the stem 3, so as to prevent the stem 3 from falling out due to factors such as human or gravity during use, and meanwhile, the integral linkage mechanism of the stem 3 and the cock valve core 2 is more compact and stable; the inner end of the end cover 4 is provided with a support shaft 26 which is used for forming a running fit with the bottom end of the plug valve core 2, and the whole structure is more stable through the arrangement.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (9)
1. The pressure balance type plug valve comprises a valve body (1), a plug valve core (2) and a valve rod (3), wherein an end cover (4) is arranged at the bottom opening of the valve body (1), an inner cavity is arranged in the valve body (1), the plug valve core (2) and the inner cavity are in a conical shape with a small upper part and a large lower part, the plug valve core (2) is arranged in the inner cavity and separates the inner cavity into an upper cavity (5) and a lower cavity (6), and a flow channel (7) which is communicated with the upper cavity (5) and the lower cavity (6) is arranged on the plug valve core (2); one end of the valve rod (3) is connected with the plug valve core (2); the method is characterized in that: the top and the bottom of the plug valve core (2) are respectively provided with a first buffer mechanism (8) and a second buffer mechanism (9).
2. The pressure balance plug valve according to claim 1, wherein a square lug (10) is arranged at the top of the plug valve core (2), and a square slot (11) matched with the square lug (10) is arranged at one end of the valve rod (3).
3. The pressure balance plug valve according to claim 2, wherein the first buffer mechanism (8) comprises a first spring (12), one end of the square protruding block (10) is provided with a limit groove (13), the first spring (12) is arranged in the limit groove (13), one end of the first spring (12) acts on the inner end of the limit groove (13), and the other end acts on the inner end of the square groove (11).
4. The pressure balance plug valve according to claim 1, wherein the second buffer mechanism (9) comprises a second spring (14), an annular limit flange (15) is arranged at the bottom of the plug valve core (2), and the inner diameter of the annular limit flange (15) is matched with the diameter of the second spring (14); the second spring (14) is arranged in the lower cavity (6), one end of the pretightening force of the second spring (14) acts on the bottom end of the plug valve core (2), and the other end acts on the end cover (4).
5. The pressure balance plug valve of claim 1, wherein a valve rod limit groove (16) is formed in the periphery of the valve rod (3), a double open ring (17) is arranged at the upper end of the valve body (1) through a fastener, and a valve rod limit flange (18) matched with the valve rod limit groove (16) is arranged on the double open ring (17).
6. The pressure balance plug valve of claim 5, wherein a sealing groove (20) coaxial with the valve rod (3) is formed in the upper end of the valve body (1), a packing (19) is embedded in the sealing groove (20), and a pressing flange (27) for pressing the packing (19) in the sealing groove (20) is arranged at the inner end of the double open loop (17).
7. The pressure balance plug valve according to claim 1, wherein a one-way switch (21) is arranged in the flow passage (7), and the one-way switch (21) only allows medium to pass from the lower cavity (6) of the plug valve core (2) to the upper cavity (5).
8. The pressure balance plug valve of claim 1, wherein a first slot (22) and a second slot (23) are respectively formed on contact surfaces between the upper end and the lower end of the plug valve core (2) and the valve body (1), and a first sealing ring (24) and a second sealing ring (25) are respectively arranged in the first slot (22) and the second slot (23).
9. The pressure balance plug valve according to claim 1, wherein the inner end of the end cover (4) is provided with a support shaft (26) which is used for forming a rotating fit with the bottom end of the plug valve core (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322368812.9U CN220706456U (en) | 2023-08-31 | 2023-08-31 | Pressure balance type plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322368812.9U CN220706456U (en) | 2023-08-31 | 2023-08-31 | Pressure balance type plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220706456U true CN220706456U (en) | 2024-04-02 |
Family
ID=90442340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322368812.9U Active CN220706456U (en) | 2023-08-31 | 2023-08-31 | Pressure balance type plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220706456U (en) |
-
2023
- 2023-08-31 CN CN202322368812.9U patent/CN220706456U/en active Active
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