CN114413024A - Two-piece type hard-sealing floating ball valve - Google Patents
Two-piece type hard-sealing floating ball valve Download PDFInfo
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- CN114413024A CN114413024A CN202210254434.9A CN202210254434A CN114413024A CN 114413024 A CN114413024 A CN 114413024A CN 202210254434 A CN202210254434 A CN 202210254434A CN 114413024 A CN114413024 A CN 114413024A
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- transverse wall
- valve cover
- sealing
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- 238000007789 sealing Methods 0.000 title claims abstract description 86
- 238000007667 floating Methods 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 25
- 238000005242 forging Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 33
- 238000003825 pressing Methods 0.000 claims description 28
- 229910002804 graphite Inorganic materials 0.000 claims description 26
- 239000010439 graphite Substances 0.000 claims description 26
- 238000012856 packing Methods 0.000 claims description 25
- 230000004323 axial length Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 238000009826 distribution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/06—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing
- F16K41/063—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing for spindles which only rotate, i.e. non-rising spindles
- F16K41/066—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing for spindles which only rotate, i.e. non-rising spindles for rotating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a two-piece type hard sealing floating ball valve, which relates to a clamp and comprises a valve body, a valve cover, a ball body and a valve rod, wherein the valve body and the valve cover are both obtained by a forging process, and the valve cover is arranged on one side of the valve body and connected with the valve body through a connecting bolt group; a cylindrical limiting block is arranged on one side of the valve cover, a first valve seat is embedded in the cylindrical limiting block, and an installation space, a second cylindrical space and a second medium channel are sequentially arranged in the valve body; the cylindrical limiting block is inserted into the mounting space and sealed by a sealing device, a second valve seat is arranged in the second cylindrical space, and a multiple sealing assembly is arranged between the second valve seat and the second cylindrical space; the ball body is arranged between the first valve seat and the second valve seat, the top of the ball body is connected with a valve rod, and the top of the valve rod penetrates through the valve body and then is connected with a sealing driving device; the invention can effectively prevent the medium leakage and effectively improve the sealing property of the equipment.
Description
Technical Field
The invention relates to a valve, in particular to a ball valve.
Background
Because fine catalyst particles and dust exist in the hydrogenation device, the catalyst particles and the dust enter between the sealing surfaces of the valve in the opening and closing processes of the valve, so that the valve is leaked and is not opened or closed. At present, gate valves and stop valves used in hydrogenation devices in the market always have the phenomena of leakage and insufficient action.
Therefore, it is necessary to provide a valve with good sealing effect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a two-piece type hard sealing floating ball valve to solve the technical problem of poor valve sealing effect in the prior art.
The invention is realized by the following technical scheme:
the utility model provides a two formula hard seal ball valve that floats, includes valve body, valve gap, spheroid and valve rod, valve body and valve gap are obtained by forging technology, one side of valve body is provided with the valve gap, the lateral wall of valve gap orientation valve body and the lateral wall of valve body orientation valve gap are vertical wall, and the both looks proximal end passes through connecting bolt group link, the lateral wall center department of valve gap orientation valve body is provided with rather than as an organic whole and axial level and orientation the cylindrical stopper of valve body, set up in the valve gap with the coaxial distribution of cylindrical stopper and run through the first medium passageway at its both ends, set up in the cylindrical stopper with the coaxial distribution of first medium passageway and communicate and run through its self first cylindrical space, the embedded first disk seat that has the external diameter the same rather than the internal diameter and axial length is greater than its self axial length of cylindrical stopper, install on the lateral wall towards the valve body and be used for sealing horizontal wall in the first cylindrical space The first sealing device is attached to the outer edge of the part, attached to the transverse wall, of the first valve seat; the end part, close to the valve cover, of the valve body is internally provided with an installation space which is coaxially distributed and communicated with the first valve seat, the inner diameter, close to the first valve seat, of the installation space is the same as the outer diameter of the first cylindrical limiting block, the first cylindrical limiting block is integrally embedded in the installation space, the end part, far away from the valve cover, of the installation space is also communicated with a second cylindrical space which is arranged in the valve body and coaxially distributed with the valve body, and the end part, far away from the valve cover, of the second cylindrical space is also communicated with a second medium channel which is arranged in the valve body, coaxially distributed with the valve body and penetrates through the end part, far away from the valve cover, of the valve body; the transverse wall of the second cylindrical space is sequentially composed of a first transverse wall, a first vertical wall, a second transverse wall, a second vertical wall and a third transverse wall in the direction from the valve cover to the valve body, the outer edge of the first transverse wall departing from the valve cover is connected with the outer edge of the first vertical wall, the inner edge of the first vertical wall is connected with the outer edge of the second transverse wall close to the valve cover, the outer edge of the second transverse wall departing from the valve cover is connected with the outer edge of the second vertical wall, the inner edge of the second vertical wall is connected with the outer edge of the third transverse wall close to the valve cover, a second valve seat coaxially distributed with the second cylindrical space is further arranged in the second cylindrical space, and the transverse outer wall of the second valve seat is sequentially composed of a fourth transverse wall, a third vertical wall, a fifth transverse wall, a fourth vertical wall, a sixth transverse wall, a fifth vertical wall and a seventh transverse wall in the direction from the valve cover to the valve body, the inner diameter of the fourth transverse wall is the same as that of the first transverse wall, the outer edge of the fourth transverse wall, which is far away from the valve cover, is connected with the outer edge of the third vertical wall, the third vertical wall is not contacted with the first vertical wall, the inner edge of the third vertical wall is connected with the outer edge of the fifth transverse wall close to the valve cover, the outer edge of the fifth transverse wall, which faces away from the valve cover, is positioned in the second transverse wall and has the same inner diameter, the outer edge of the fifth transverse wall, which is far away from the valve cover, is connected with the outer edge of the fourth vertical wall, the inner edge of the fourth vertical wall is connected with the outer edge of the sixth transverse wall, which is close to the valve cover, the outer edge of the sixth transverse wall, which is far away from the valve cover, is connected with the outer edge of the fifth vertical wall, the inner edge of the fifth vertical wall is connected with the outer edge of the seventh transverse wall, which is close to the valve cover, and the outer edge of the seventh transverse wall, which is far away from the valve cover, is positioned in the third transverse wall; a first graphite sealing ring, a first pressing ring, a valve seat disc spring, a second pressing ring, a second graphite sealing ring and a first backing ring which have the same outer diameter as the inner diameter of the second transverse wall and are coaxially distributed with the second transverse wall are sequentially arranged in the space enclosed by the second transverse wall in the direction from the valve cover to the valve body, the inner diameter of the first graphite sealing ring is the same as that of the sixth transverse wall and is sleeved outside the sixth transverse wall, the transverse inner wall of the first press ring is composed of an eighth transverse wall, a sixth vertical wall and a ninth transverse wall, the eighth transverse wall has the same inner diameter as the sixth transverse wall and its end adjacent to the valve cover is located inside the sixth transverse wall and its end facing away from the valve cover is located outside the sixth transverse wall, the sixth vertical wall and the fifth vertical wall are not in contact with each other, and the ninth transverse wall and the seventh transverse wall are attached to each other; the ball body is arranged between the first valve seat and the second valve seat, the top of the ball body is connected with a valve rod, and the top of the valve rod penetrates through the valve body and then is connected with the sealing driving device.
Further, the side wall of the second pressure ring, which is far away from the valve cover, is uniformly provided with a protruding block integrated with the second pressure ring around the shaft of the second pressure ring, the second graphite sealing ring is uniformly provided with a positioning hole for the protruding block to pass through around the shaft of the second graphite sealing ring, and the side wall of the first backing ring, which faces the valve cover, is uniformly provided with an embedding groove for the end part of the protruding block to be embedded into around the shaft of the first backing ring.
Furthermore, the first sealing device comprises a second backing ring which is positioned outside the cylindrical limiting block and coaxially distributed with the cylindrical limiting block, and a plurality of screws which are positioned outside the second backing ring and uniformly distributed around the shaft of the second backing ring, and the end parts of the screws penetrate through the second backing ring and are in threaded connection with the cylindrical limiting block; the external diameter of second backing ring with the external diameter of cylindrical stopper is the same, and its internal diameter is greater than the internal diameter in first cylindrical space is less than the internal diameter of first disk seat, be equipped with annular breach in the tip outer fringe that first disk seat deviates from the valve gap, the vertical wall of annular breach with the vertical wall laminating that the second backing ring closes on the valve gap, and its horizontal wall then laminates with the horizontal inner wall part of second backing ring.
Furthermore, the outside of cylindrical stopper still overlaps and is equipped with rather than contactless and half inlays half the octagonal seal pad of putting in the valve body that inlays half in the valve gap.
Further, be provided with rather than the annular supporting bench of as an organic whole and coaxial distribution on the vertical wall in first cylindrical space, the vertical wall of annular supporting bench with the vertical wall of first disk seat orientation valve gap is laminated each other.
Further, the sealing driving device comprises a sealing assembly and a driving assembly, the sealing assembly comprises a plane bearing, a flexible graphite sealing ring, a shaft sleeve, a positioning ring, a flexible graphite ring, a packing pressing sleeve, a packing pressing plate and a plurality of locking bolts, a sealing space which is thick at the top and thin at the bottom and is communicated with the installation space for the valve rod to penetrate out is arranged at the top of the valve body, an annular bearing platform which is coaxially distributed with the valve rod and integrated with the valve rod is arranged on the outer wall of the bottom end of the valve rod, the annular bearing platform is provided with the plane bearing which is sleeved outside the valve rod and coaxially distributed with the valve rod, the plane bearing is embedded in the top of the installation space, the outer side of the plane bearing is sleeved with the flexible graphite sealing ring which is not in contact with the plane bearing platform and is embedded in the top of the installation space, the inner wall of the thin part in the sealing space and the shaft sleeve which is provided with the inner wall and the outer wall and the valve rod which are respectively attached to each other, the valve rod is characterized in that a packing pressing plate, a packing pressing sleeve, a flexible graphite ring and a positioning ring which are sleeved on the valve rod are sequentially arranged in the thicker part of the sealing space from top to bottom, the top end of the packing pressing sleeve is positioned outside the sealing space, the bottom end of the packing pressing sleeve is embedded into the sealing space, and the packing pressing plate is completely positioned outside the sealing space and is connected with the valve body through a plurality of locking bolts.
Furthermore, the locking bolt comprises a stud, a nut and a disc spring assembly, the bottom end of the stud is in threaded connection with the valve body, and the top end of the stud sequentially penetrates through the packing pressing plate and the disc spring assembly and then is in threaded connection with the nut.
Compared with the prior art, the invention has the following advantages:
the two-piece type hard sealing floating ball valve provided by the invention adopts a two-piece type design, so that the equipment is convenient to install, the defects of air holes and the like in castings can be avoided, and meanwhile, the equipment adopts a multiple sealing structure, so that the sealing property of the equipment can be effectively improved, and the defects in the prior art are avoided.
Drawings
FIG. 1 is a schematic structural diagram of a two-piece hard seal floating ball valve according to an embodiment;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a partial exploded view of section A of FIG. 1;
FIG. 4 is an enlarged view of a portion B of FIG. 1;
fig. 5 is a partial exploded view of B in fig. 1.
In the figure: 1. a valve body; 2. a valve cover; 3. a sphere; 4. a valve stem; 5. a set of connection bolts; 6. a cylindrical limiting block; 7. a first medium passage; 8. a first cylindrical space; 9. a first valve seat; 10. an installation space; 11. a second cylindrical space; 12. a second medium passage; 13. a first transverse wall; 14. a first vertical wall; 15. a second transverse wall; 16. a second vertical wall; 17. a third transverse wall; 18. a second valve seat; 19. a fourth transverse wall; 20. a third vertical wall; 21. a fifth transverse wall; 22. a fourth vertical wall; 23. a sixth transverse wall; 24. a fifth vertical wall; 25. a seventh transverse wall; 26. a first graphite seal ring; 27. a first pressure ring; 28. a valve seat disc spring; 29. a second pressure ring; 30. a second graphite seal ring; 31. a first backing ring; 32. an eighth transverse wall; 33. a sixth vertical wall; 34. a ninth transverse wall; 35. a second backing ring; 36. a screw; 37. an octagonal sealing gasket; 38. an annular support table; 39. a flat bearing; 40. a flexible graphite seal ring; 41. a shaft sleeve; 42. a positioning ring; 43. a flexible graphite ring; 44. pressing and sleeving the filler; 45. a packing press plate; 46. locking the bolt; 47. a drive assembly; 48. a stud; 49. a nut; 50. a disc spring assembly.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
With reference to fig. 1-5, this embodiment provides a two-piece type hard-sealing floating ball valve, which includes a valve body 1, a valve cover 2, a ball body 3, a valve rod 4, etc., wherein the valve body 1 and the valve cover 2 are both obtained by forging process, which avoids the defects of bubbles and the like existing in the traditional casting, and secondly, in this embodiment, the valve body 1 and the valve cover 2 are horizontally arranged, that is, the valve cover 2 is arranged on one side of the valve body 1, the side wall of the valve cover 2 facing the valve body 1 and the side wall of the valve body 1 facing the valve cover 2 are both vertical walls, the adjacent ends of the two are connected by a connecting bolt group 5, and secondly, in order to effectively seal the gap between the two, in this embodiment, an octagonal sealing gasket 37 is further arranged between the valve body 1 and the valve cover 2, and simultaneously, a half-embedding groove is respectively arranged on the side wall of the valve body 1 facing the valve cover 2 and the side wall of the valve cover 2 facing the valve body 1, when the valve body 1 and the valve cover 2 are connected, the octagonal sealing gasket 37 is embedded in the whole formed by the two semi-embedding grooves, so that the sealing purpose is achieved;
meanwhile, in order to facilitate the manufacture and installation of the device, in this embodiment, a cylindrical limiting block 6 which is integrated with the valve cover 2 and is axially horizontal and faces the valve body 1 is arranged at the center of the side wall of the valve body 1 of the valve cover 2, for the circulation of a medium, a first medium channel 7 which is coaxially distributed with the cylindrical limiting block 6 and penetrates through two ends of the cylindrical limiting block 6 is arranged in the valve cover 2, a first cylindrical space 8 which is communicated with the first medium channel 7, coaxially distributed and penetrates through the cylindrical limiting block 6 is arranged on the cylindrical limiting block 6, a first valve seat 9 which has the same outer diameter as the inner diameter of the first cylindrical space 8 and has the axial length larger than the axial length of the first cylindrical space 8 is embedded in the first cylindrical space 8, namely, the first sealing device for sealing the first cylindrical space 8 is arranged at the outer edge of the gap between the transverse wall and the transverse outer wall of the first valve seat 9, which deviates from the valve cover 2, and is arranged at the outer edge of the first sealing device Furthermore, the medium can only flow through the first medium channel 7 and the inner cavity of the first valve seat 9 and cannot flow through the gap between the first cylindrical space 8 and the first valve seat 9, so that the medium can be prevented from leaking;
in order to facilitate installation of the ball body 3, in this embodiment, an installation space 10 coaxially distributed and communicated with the first valve seat 9 is formed in the end part of the valve body 1 facing the valve cover 2, the inner diameter of the end part of the installation space 10 close to the first valve seat 9 is the same as the outer diameter of the first cylindrical limiting block 6, and the first cylindrical limiting block 6 is integrally embedded in the installation space 10; installation space 10 deviates from the tip of valve gap 2 and sets up in valve body 1 and rather than the second cylindrical space 11 intercommunication of coaxial distribution, the tip that second cylindrical space 11 deviates from valve gap 2 then with set up in valve body 1, just run through the second medium passageway 12 intercommunication that valve body 1 deviates from the tip of valve gap 2 rather than coaxial distribution, be provided with second valve seat 18 in the second cylindrical space 11, be provided with spheroid 3 between first valve seat 9 and the second valve seat 18, the top of spheroid 3 then is connected with valve rod 4, the top of valve rod 4 is connected with sealed drive arrangement after running through valve body 1.
I.e. the medium flow paths are the first medium channel 7, the first valve seat 9, the ball 3, the second valve seat 18 and the second medium channel 12, the medium passage being realized by the driving ball 3.
In order to effectively seal the device, in this embodiment, the transverse wall of the second cylindrical space 11 is made up of a first transverse wall 13, a first vertical wall 14, a second transverse wall 15, a second vertical wall 16 and a third transverse wall 17 in sequence in the direction from the bonnet 2 to the valve body 1, wherein the outer edge of the first transverse wall 13 away from the bonnet 2 is connected with the outer edge of the first vertical wall 14, the inner edge of the first vertical wall 14 is connected with the outer edge of the second transverse wall 15 adjacent to the bonnet 2, the outer edge of the second transverse wall 15 away from the bonnet 2 is connected with the outer edge of the second vertical wall 16, the inner edge of the second vertical wall 16 is connected with the outer edge of the third transverse wall 17 adjacent to the bonnet 2, that is, the second cylindrical space 11 is a three-stage structure with gradually reduced inner diameter as a whole;
in order to cooperate with the second cylindrical space 11 to form an effective seal, in the present embodiment, the transverse outer wall of the second valve seat 18 is sequentially formed by a fourth transverse wall 19, a third vertical wall 20, a fifth transverse wall 21, a fourth vertical wall 22, a sixth transverse wall 23, a fifth vertical wall 24 and a seventh transverse wall 25 in the direction from the bonnet 2 to the valve body 1, the inner diameter of the fourth transverse wall 19 is the same as the inner diameter of the first transverse wall 13, the outer edge of the fourth transverse wall 19, which is away from the bonnet 2, is connected with the outer edge of the third vertical wall 20, and the third vertical wall 20 is not in contact with the first vertical wall 14, that is, the non-contact arrangement of the two walls when the second bonnet 2 works enables the second valve seat 18 to have a displacement space, so that elastic sealing can be realized; the inner edge of the third vertical wall 20 is connected with the outer edge of the fifth horizontal wall 21 close to the valve cover 2, the outer edge of the fifth horizontal wall 21 away from the valve cover 2 is positioned in the second horizontal wall 15, the inner diameters of the outer edges are the same, the outer edge of the fifth horizontal wall 21 away from the valve cover 2 is connected with the outer edge of the fourth vertical wall 22, the inner edge of the fourth vertical wall 22 is connected with the outer edge of the sixth horizontal wall 23 close to the valve cover 2, the outer edge of the sixth horizontal wall 23 away from the valve cover 2 is connected with the outer edge of the fifth vertical wall 24, the inner edge of the fifth vertical wall 24 is connected with the outer edge of the seventh horizontal wall 25 close to the valve cover 2, and the outer edge of the seventh horizontal wall 25 away from the valve cover 2 is positioned in the third horizontal wall 17; that is, the transverse outer wall of the second valve seat 18 is of a four-stage step-shaped structure as a whole, wherein the third vertical wall 20 and the first vertical wall 14 are arranged in a non-contact manner to provide a displacement space for the horizontal movement of the first valve seat 9, so that the purpose of elastic sealing can be achieved.
Secondly, in order to seal the gap between the second valve seat 18 and the second cylindrical space 11, in the present embodiment, the space surrounded by the second transverse wall 15 is provided with a first graphite sealing ring 26, a first pressing ring 27, a valve seat disc spring 28, a second pressing ring 29, a second graphite sealing ring 30 and a first backing ring 31 which have the same outer diameter as the inner diameter of the second transverse wall 15 and are coaxially distributed with the second transverse wall 15 in the direction from the bonnet 2 to the valve body 1, the inner diameter of the first graphite sealing ring 26 is the same as the inner diameter of the sixth transverse wall 23 and is sleeved outside the sixth transverse wall 23, the transverse inner wall of the first pressing ring 27 is specifically composed of an eighth transverse wall 32, a sixth vertical wall 33 and a ninth transverse wall 34, the inner diameter of the eighth transverse wall 32 is the same as the inner diameter of the sixth transverse wall 23, the end portion of the eighth transverse wall 32 close to the bonnet 2 is located inside the sixth transverse wall 23, and the end portion of the eighth transverse wall 23 far from the bonnet 2 is located outside the sixth transverse wall 23, the sixth vertical wall 33 and the fifth vertical wall 24 are not in contact with each other, the ninth transverse wall 34 and the seventh transverse wall 25 are attached to each other, and the inner diameters of the valve seat disc spring 28, the second press ring 29, the second graphite seal ring 30 and the first backing ring 31 are the same as the outer diameter of the seventh transverse wall 25.
First graphite sealing washer 26 carries out preliminary sealing promptly and can effectively seal once more with the help of first clamping ring 27 echelonment setting, and the setting of first clamping ring 27 echelonment makes it have certain level to the displacement space simultaneously, and then can realize self-interacting and seal, secondly, with the help of first clamping ring 27, disk spring 28, second clamping ring 29, second graphite sealing washer 30 and first backing ring 31's setting, realized sealed self-interacting purpose when realizing multiple sealed, and then can effectively improve sealed effect.
Wherein, for the relative position of effective fixed second clamping ring 29, second graphite sealing ring 30 and first backing ring 31, in this embodiment, evenly be provided with rather than protruding piece as an organic whole around its axle on the lateral wall that second clamping ring 29 deviates from valve gap 2, evenly set up the locating hole that supplies protruding piece to pass through around its axle on the second graphite sealing ring 30, evenly set up the embedding groove that supplies protruding piece tip embedding around its axle on the lateral wall of first backing ring 31 orientation valve gap 2, and then can effectively fix the relative position between the three, be convenient for seal.
In particular, in this embodiment, the first sealing device includes a second backing ring 35 located outside the cylindrical stopper 6 and coaxially distributed with the cylindrical stopper 6, and a plurality of screws 36 located outside the second backing ring 35 and uniformly distributed around the axis thereof, and having end portions penetrating through the second backing ring 35 and threadedly connected with the cylindrical stopper 6; the external diameter of second backing ring 35 is the same with cylindrical stopper 6's external diameter, and its internal diameter is greater than the internal diameter of first cylindrical space 8 and is less than the internal diameter of first disk seat 9, and first disk seat 9 deviates from and is equipped with annular breach on the tip outer fringe of valve gap 2, and the vertical wall of annular breach and the vertical wall laminating that second backing ring 35 closes on valve gap 2, and its horizontal wall then laminates with the horizontal inner wall part of second backing ring 35.
Namely, the second backing ring 35 is pressed on the gap between the cylindrical limit block 6 and the first valve seat 9 to achieve the purpose of effective sealing.
In particular, in order to further improve the sealing effect, in the present embodiment, an annular supporting table 38 is disposed on the vertical wall of the first cylindrical space 8, and is integrated with the vertical wall of the first cylindrical space and coaxially distributed with the first cylindrical space, and the vertical wall of the annular supporting table 38 and the vertical wall of the first valve seat 9 facing the valve cover 2 are mutually attached; the contact area between the first valve seat 9 and the first cylindrical space 8 can be effectively reduced by the arrangement, so that the sealing effect can be further improved.
Particularly, the sealing driving device comprises a sealing assembly and a driving assembly 47, the sealing assembly comprises a plane bearing 39, a flexible graphite sealing ring 40, a shaft sleeve 41, a positioning ring 42, a flexible graphite ring 43, a packing pressing sleeve 44, a packing pressing plate 45 and a plurality of locking bolts 46, the top of the valve body 1 is provided with a sealing space which is thick at the top and thin at the bottom and is communicated with the installation space 10 for the valve rod 4 to penetrate out, the outer wall of the bottom end of the valve rod 4 is provided with an annular bearing platform which is coaxially distributed with the valve rod 4, the annular bearing platform is provided with the plane bearing 39 which is sleeved outside the valve rod 4 and coaxially distributed with the valve rod, the plane bearing 39 is embedded in the top of the installation space 10, the outer side of the plane bearing 39 is sleeved with the flexible graphite sealing ring 40 which is not contacted with the plane bearing platform and is embedded in the top of the installation space 10, the inner wall and the outer wall of the thin part in the sealing space are provided with the shaft sleeve 41 which is respectively attached with the inner wall and the outer wall of the valve rod 4, a packing pressure plate 45, a packing pressing sleeve 44, a flexible graphite ring 43 and a positioning ring 42 which are sleeved on the valve rod 4 are sequentially arranged in the thicker part of the sealing space from top to bottom, the top end of the packing pressing sleeve 44 is positioned outside the sealing space, the bottom end of the packing pressing sleeve is embedded into the sealing space, and the packing pressure plate 45 is completely positioned outside the sealing space and is connected with the valve body 1 through a plurality of locking bolts 46;
through the arrangement, the valve rod 4 can be effectively driven, and the gap between the valve rod 4 and the valve body 1 can be effectively sealed.
In particular, in order to realize the elastic self-compensating seal, in the embodiment, the locking bolt 46 comprises a stud 48, a nut 49 and a disc spring assembly 50, wherein the bottom end of the stud 48 is in threaded connection with the valve body 1, and the top end of the stud 48 is in threaded connection with the nut 49 after sequentially penetrating through the packing pressure plate 45 and the disc spring assembly 50.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A two-piece type hard sealing floating ball valve comprises a valve body, a valve cover, a ball body and a valve rod, and is characterized in that the valve body and the valve cover are obtained by a forging process, the valve cover is arranged on one side of the valve body, the side wall of the valve cover facing the valve body and the side wall of the valve body facing the valve cover are both vertical walls, the adjacent ends of the two are connected through a connecting bolt group, a cylindrical limiting block which is integrated with the valve cover and is axially horizontal and faces the valve body is arranged at the center of the side wall of the valve cover facing the valve body, a first medium channel which is coaxially distributed with the cylindrical limiting block and penetrates through the two ends of the cylindrical limiting block is arranged in the valve cover, a first cylindrical space which is coaxially distributed with the first medium channel and penetrates through the cylindrical limiting block is arranged in the cylindrical limiting block, a first valve seat which has the same outer diameter as the inner diameter and has an axial length larger than the axial length of the first valve seat is embedded in the first cylindrical space, a first sealing device for sealing the outer edge of the joint part of the transverse wall in the first cylindrical space and the transverse wall in the first valve seat is arranged on the side wall of the cylindrical limiting block facing the valve body; the end part, close to the valve cover, of the valve body is internally provided with an installation space which is coaxially distributed and communicated with the first valve seat, the inner diameter, close to the first valve seat, of the installation space is the same as the outer diameter of the first cylindrical limiting block, the first cylindrical limiting block is integrally embedded in the installation space, the end part, far away from the valve cover, of the installation space is also communicated with a second cylindrical space which is arranged in the valve body and coaxially distributed with the valve body, and the end part, far away from the valve cover, of the second cylindrical space is also communicated with a second medium channel which is arranged in the valve body, coaxially distributed with the valve body and penetrates through the end part, far away from the valve cover, of the valve body; the transverse wall of the second cylindrical space is sequentially composed of a first transverse wall, a first vertical wall, a second transverse wall, a second vertical wall and a third transverse wall in the direction from the valve cover to the valve body, the outer edge of the first transverse wall departing from the valve cover is connected with the outer edge of the first vertical wall, the inner edge of the first vertical wall is connected with the outer edge of the second transverse wall close to the valve cover, the outer edge of the second transverse wall departing from the valve cover is connected with the outer edge of the second vertical wall, the inner edge of the second vertical wall is connected with the outer edge of the third transverse wall close to the valve cover, a second valve seat coaxially distributed with the second cylindrical space is further arranged in the second cylindrical space, and the transverse outer wall of the second valve seat is sequentially composed of a fourth transverse wall, a third vertical wall, a fifth transverse wall, a fourth vertical wall, a sixth transverse wall, a fifth vertical wall and a seventh transverse wall in the direction from the valve cover to the valve body, the inner diameter of the fourth transverse wall is the same as that of the first transverse wall, the outer edge of the fourth transverse wall, which is far away from the valve cover, is connected with the outer edge of the third vertical wall, the third vertical wall is not contacted with the first vertical wall, the inner edge of the third vertical wall is connected with the outer edge of the fifth transverse wall close to the valve cover, the outer edge of the fifth transverse wall, which faces away from the valve cover, is positioned in the second transverse wall and has the same inner diameter, the outer edge of the fifth transverse wall, which is far away from the valve cover, is connected with the outer edge of the fourth vertical wall, the inner edge of the fourth vertical wall is connected with the outer edge of the sixth transverse wall, which is close to the valve cover, the outer edge of the sixth transverse wall, which is far away from the valve cover, is connected with the outer edge of the fifth vertical wall, the inner edge of the fifth vertical wall is connected with the outer edge of the seventh transverse wall, which is close to the valve cover, and the outer edge of the seventh transverse wall, which is far away from the valve cover, is positioned in the third transverse wall; a first graphite sealing ring, a first pressing ring, a valve seat disc spring, a second pressing ring, a second graphite sealing ring and a first backing ring which have the same outer diameter as the inner diameter of the second transverse wall and are coaxially distributed with the second transverse wall are sequentially arranged in the space enclosed by the second transverse wall in the direction from the valve cover to the valve body, the inner diameter of the first graphite sealing ring is the same as that of the sixth transverse wall and is sleeved outside the sixth transverse wall, the transverse inner wall of the first press ring is composed of an eighth transverse wall, a sixth vertical wall and a ninth transverse wall, the eighth transverse wall has the same inner diameter as the sixth transverse wall and its end adjacent to the valve cover is located inside the sixth transverse wall and its end facing away from the valve cover is located outside the sixth transverse wall, the sixth vertical wall and the fifth vertical wall are not in contact with each other, and the ninth transverse wall and the seventh transverse wall are attached to each other; the ball body is arranged between the first valve seat and the second valve seat, the top of the ball body is connected with a valve rod, and the top of the valve rod penetrates through the valve body and then is connected with the sealing driving device.
2. The two-piece hard seal floating ball valve according to claim 1, wherein the side wall of the second compression ring away from the valve cover is uniformly provided with a protrusion block integrated with the second compression ring around the axis thereof, the second graphite seal ring is uniformly provided with a positioning hole around the axis thereof for the protrusion block to pass through, and the side wall of the first backing ring facing the valve cover is uniformly provided with an embedding groove around the axis thereof for the end of the protrusion block to be embedded into.
3. The two-piece hard seal floating ball valve according to claim 2, wherein the first sealing means comprises a second backing ring disposed outside and coaxially with the cylindrical stopper and a plurality of screws disposed outside and uniformly distributed around the second backing ring and having ends penetrating the second backing ring and threadedly coupled with the cylindrical stopper; the external diameter of second backing ring with the external diameter of cylindrical stopper is the same, and its internal diameter is greater than the internal diameter in first cylindrical space is less than the internal diameter of first disk seat, be equipped with annular breach in the tip outer fringe that first disk seat deviates from the valve gap, the vertical wall of annular breach with the vertical wall laminating that the second backing ring closes on the valve gap, and its horizontal wall then laminates with the horizontal inner wall part of second backing ring.
4. The two-piece hard seal floating ball valve according to claim 3, wherein the outside of the cylindrical limiting block is further sleeved with an octagonal sealing gasket which is not in contact with the cylindrical limiting block and is half embedded in the valve cover and half embedded in the valve body.
5. The two-piece hard seal floating ball valve according to claim 2, wherein the vertical wall of the first cylindrical space is provided with an annular support platform which is integrated with the vertical wall of the first cylindrical space and coaxially distributed, and the vertical wall of the annular support platform and the vertical wall of the first valve seat facing the valve cover are mutually attached.
6. The two-piece hard seal floating ball valve according to claim 5, wherein the seal driving device comprises a seal assembly and a driving assembly, the seal assembly comprises a planar bearing, a flexible graphite sealing ring, a shaft sleeve, a positioning ring, a flexible graphite ring, a packing pressing sleeve, a packing pressing plate and a plurality of locking bolts, the top of the valve body is provided with a seal space which is thick at the top and thin at the bottom and is communicated with the installation space for the valve rod to penetrate out, the outer wall of the bottom end of the valve rod is provided with an annular bearing platform which is coaxially distributed with the valve rod and integrated with the valve rod, the annular bearing platform is provided with a planar bearing which is sleeved outside the valve rod and coaxially distributed with the valve rod, the planar bearing is embedded in the top of the installation space, the outer side of the planar bearing is sleeved with the flexible graphite sealing ring which is not in contact with the planar bearing platform and is embedded in the top of the installation space, the valve comprises a valve body, a valve rod and a sealing space, wherein an inner wall and an outer wall of the valve rod are arranged between the inner wall of the thin portion of the sealing space and the valve rod, shaft sleeves which are respectively attached to the inner wall and the outer wall of the thin portion of the sealing space and the valve rod are arranged between the inner wall of the thin portion of the sealing space and the valve rod, a packing pressing plate, a packing pressing sleeve, a flexible graphite ring and a positioning ring which are sleeved on the valve rod are sequentially arranged in the thick portion of the sealing space from top to bottom, the top end of the packing pressing sleeve is located outside the sealing space, the bottom end of the packing pressing sleeve is embedded into the sealing space, and the packing pressing plate is completely located outside the sealing space and is connected with the valve body through a plurality of locking bolts.
7. The two-piece hard seal floating ball valve according to claim 6, wherein the locking bolt comprises a stud, a nut and a disc spring assembly, the bottom end of the stud is in threaded connection with the valve body, and the top end of the stud is in threaded connection with the nut after sequentially penetrating through the packing pressure plate and the disc spring assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210254434.9A CN114413024A (en) | 2022-03-15 | 2022-03-15 | Two-piece type hard-sealing floating ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210254434.9A CN114413024A (en) | 2022-03-15 | 2022-03-15 | Two-piece type hard-sealing floating ball valve |
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| Publication Number | Publication Date |
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| CN114413024A true CN114413024A (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210254434.9A Pending CN114413024A (en) | 2022-03-15 | 2022-03-15 | Two-piece type hard-sealing floating ball valve |
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| CN (1) | CN114413024A (en) |
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| CN113790283A (en) * | 2021-09-29 | 2021-12-14 | 江苏神通阀门股份有限公司 | Two-section type low-temperature forged steel floating ball valve |
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| KR20140002317A (en) * | 2012-06-29 | 2014-01-08 | (주)범석엔지니어링 | Ball valve |
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