CN109357035B - Axial sealing ball valve of valve rod - Google Patents
Axial sealing ball valve of valve rod Download PDFInfo
- Publication number
- CN109357035B CN109357035B CN201811631877.5A CN201811631877A CN109357035B CN 109357035 B CN109357035 B CN 109357035B CN 201811631877 A CN201811631877 A CN 201811631877A CN 109357035 B CN109357035 B CN 109357035B
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- resistant layer
- sealing
- valve rod
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- 238000007789 sealing Methods 0.000 title claims abstract description 102
- 238000005260 corrosion Methods 0.000 claims abstract description 102
- 230000007797 corrosion Effects 0.000 claims abstract description 102
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims description 20
- 210000004907 gland Anatomy 0.000 claims description 12
- 238000010030 laminating Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 11
- 238000012856 packing Methods 0.000 description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F16K5/0647—Spindles or actuating means
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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
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
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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
- 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
- F16K5/0657—Particular coverings or materials
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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
- F16K5/0694—Spindle sealings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
A valve rod axial sealing ball valve. The problem of current ball valve rod department seal unreliable, leak easily is solved. The valve body is provided with a medium channel, the ball body is arranged in the medium channel, a first corrosion-resistant layer is arranged on the ball body and extends to the valve rod, a second corrosion-resistant layer is arranged on the valve body, a third corrosion-resistant layer is arranged between the valve cover and the valve body, the third corrosion-resistant layer and the first corrosion-resistant layer are jointed to form a first sealing surface and the first sealing surface is in an inverted L shape on the cross section of the first sealing surface, the third corrosion-resistant layer and the second corrosion-resistant layer are jointed to form a second sealing surface, and a pressing mechanism for pressing the third corrosion-resistant layer to the first corrosion-resistant layer is arranged on the valve cover. The invention also has the advantages of simple structure, convenient assembly, reliable sealing, long service life and the like.
Description
Technical Field
The invention relates to a ball valve, in particular to a valve rod axial sealing ball valve.
Background
Ball valves (ball valves) have been developed in the 50 s of the 20 th century, and along with the rapid development of science and technology, the continuous improvement of production process and product structure has been rapidly developed into a main valve class in a short 40-year period. In countries with developed western industry, the use of ball valves is increasing year by year. In China, the ball valve is widely applied to industries such as petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and plays a role in national economy. It has the action of rotating 90 degrees, the cock body is a sphere with a circular through hole or channel passing through its axis. Ball valves are used in pipelines mainly to cut off, distribute and change the flow direction of a medium, and can be tightly closed only by rotating the ball valve by 90 degrees and small rotating moment.
The existing fluorine lining ball valve generally comprises a valve body, a valve rod, a valve ball and a valve cover, wherein fluorine lining is usually carried out at the positions of the valve body, the valve rod and the valve ball, so that a product has higher corrosion resistance, and the existing improvement on the ball valve is mainly carried out on the positions of a valve seat and the valve ball to carry out sealing compensation, so that a medium channel is prevented from leaking, and filler sealing is still adopted at the position of the valve rod (see figure 1). The valve rod and the valve cover of the existing ball valve are sealed by adopting filling materials, and even if a corrosion-resistant layer is arranged at the valve cover, the sealing between the valve rod and the valve rod is unreliable due to structural limitation, and the valve rod and the valve cover are simply attached and easily leaked. In the actual production process, the packing is usually pressed by a gland to be sealed, and then reliable sealing is realized by the characteristic diffusion of the packing, so that the packing is greatly influenced by temperature, and the precision difference caused by the influence of temperature in winter and summer in actual work is two centimeters, so that the packing has high requirement on experience of staff during installation, and excessive abrasion and leakage are easy to occur in the continuous working process. The packing is radial seal (the packing is defined as radial seal due to radial diffusion and valve rod fitting), so the coaxiality requirement on the valve rod is very high during installation, slight deviation exists, the packing is severely worn in the operation process, a gland is arranged at the packing, a worker is required to monitor in real time and manually compress the packing, time and labor are wasted, the service life is short, and the opening and closing times can only reach hundreds of times. In particular, in the pneumatic control system, the coaxiality of the pneumatic center, the bolt center driven by the pneumatic driving piece, the club center and the sphere center is required to be maintained, so that the product has a complex structure, is troublesome to install, is easy to seal, is unreliable, and is easy to leak.
Disclosure of Invention
The invention provides a valve rod axial sealing ball valve, which aims to solve the problems that the sealing at the valve rod of the existing ball valve in the background technology is unreliable and easy to leak.
The technical scheme of the invention is as follows: the utility model provides a valve rod axial seal ball valve, includes the spheroid, the valve rod, valve gap and the valve body that are connected with the spheroid, the valve body on be equipped with the medium passageway, the spheroid locate in the medium passageway, the spheroid have the first position that blocks medium circulation in the medium passageway when closing and the second position that makes medium passageway switch on when opening, the spheroid on be equipped with first corrosion-resistant layer, first corrosion-resistant layer lining on the spheroid and extend to the valve rod, the valve body on be equipped with the second corrosion-resistant layer, valve gap and valve body between be equipped with the third corrosion-resistant layer, third corrosion-resistant layer and first corrosion-resistant layer laminate mutually and form first sealed face and be the L type of inversion on its cross section, third corrosion-resistant layer and second corrosion-resistant layer laminate mutually and form the second sealed face, the valve gap on be equipped with the hold-down mechanism that makes third corrosion-resistant layer laminate and compress tightly first corrosion-resistant layer.
As an improvement of the invention, the valve rod is provided with a valve rod shoulder, the first corrosion-resistant layer comprises a valve rod vertical part and a valve rod bending part arranged at the valve rod shoulder, the third corrosion-resistant layer is provided with a first sealing part attached to the valve rod bending part and a second sealing part attached to the valve rod vertical part, and the first sealing part is matched with the valve rod bending part and the second sealing part is matched with the valve rod vertical part to form the first sealing surface.
As a further improvement of the invention, the valve body is provided with a valve body stop shoulder, the second corrosion-resistant layer is provided with a valve body bending part at the valve body stop shoulder, the third corrosion-resistant layer is provided with a third sealing part attached to the valve body bending part, and the third sealing part and the valve body bending part are mutually matched to form a second sealing surface.
As a further improvement of the invention, the valve rod vertical part and the valve rod bending part are arranged vertically to each other.
As a further improvement of the invention, the valve cover is provided with a step, and the valve cover enables the third corrosion-resistant layer to be respectively attached to the second corrosion-resistant layer and the first corrosion-resistant layer through the end face and the step of the valve cover.
As a further improvement of the invention, the pressing mechanism comprises a pressing cover, a sealing element and a locking nut, wherein the sealing element is sleeved outside the valve rod and respectively attached to the valve rod and the third corrosion-resistant layer, an elastic element is arranged between the locking nut and the pressing cover, and the elastic element has a movement trend of pressing the sealing element through the pressing cover and enabling the sealing element to respectively attach to the valve rod and the third corrosion-resistant layer.
As a further improvement of the invention, the gland is sleeved outside the sealing element, and the gland is provided with an inclined plane which is attached to the sealing element.
As a further improvement of the invention, the sealing element is arranged above the third corrosion-resistant layer, and an O-shaped ring is arranged on the sealing element.
As a further improvement of the invention, the elastic element is a disc spring.
As a further improvement of the invention, the valve body is provided with the corrosion-resistant valve seat, and the corrosion-resistant valve seat is matched with the first corrosion-resistant layer, the second corrosion-resistant layer and the third corrosion-resistant layer to form a cavity.
The invention has the beneficial effects that the corrosion-resistant layer is arranged, so that the parts possibly contacted with the medium channel are wrapped, the corrosion of metal parts is avoided, the product can act under the working condition of corrosive medium, the adaptation range of the product is wide, and the sealing is reliable. The third corrosion-resistant layer is respectively attached to the first corrosion-resistant layer and the second corrosion-resistant layer to realize sealing of a product, the sealing is reliable, particularly, the axial sealing is adopted at the valve rod, the sealing is surface sealing, the sealing is reliable, the coaxiality of the valve rod is not required to be guaranteed, the requirement on the processing precision of the product is low, the product is convenient to install, and the service life is long. The invention also has the advantages of simple structure, convenient assembly, reliable sealing, long service life and the like.
Drawings
Fig. 1 is a schematic structural view of a conventional ball valve.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is an enlarged schematic view of the structure at I in fig. 2.
In the figure, 1, a sphere; 2. a valve stem; 21. a valve stem shoulder; 3. a valve cover; 31. a step; 4. a valve body; 41. a media channel; 42. a valve body shoulder; 43. a corrosion resistant valve seat; 44. a cavity; 5. a first corrosion resistant layer; 51. a valve stem vertical portion; 52. a valve rod bending part; 6. a second corrosion resistant layer; 61. a valve body bending part; 7. a third corrosion resistant layer; 71. a first sealing part; 72. a second sealing part; 73. a third sealing part; 8. a first sealing surface; 9. a second sealing surface; 10. a compressing mechanism; 11. a gland; 111. an inclined plane; 12. a seal; 13. a lock nut; 14. an elastic member; 15. an O-ring.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
the utility model provides a valve rod axial seal ball valve, includes spheroid 1, valve rod 2, valve gap 3 and the valve body 4 that are connected with spheroid 1, valve body 4 on be equipped with medium passageway 41, spheroid 1 locate in the medium passageway 41, spheroid 1 have and block the first position that medium in the medium passageway 41 was circulated and make the second position that medium passageway 41 switched on when opening when closing, spheroid 1 on be equipped with first corrosion resistant layer 5, first corrosion resistant layer 5 lining on spheroid 1 and extend to valve rod 2, valve body 4 on be equipped with second corrosion resistant layer 6, valve gap 3 and valve body 4 between be equipped with third corrosion resistant layer 7, third corrosion resistant layer 7 and first corrosion resistant layer 5 laminate and form first sealed face 8 and first sealed face 8 be the L type that inverts on its cross section, third corrosion resistant layer 7 and second corrosion resistant layer 6 laminate and form second sealed face 9 mutually, valve gap 3 on be equipped with and make third corrosion resistant layer 7 compress tightly first layer 5 of mechanism 10 of pressing. The invention has the beneficial effects that the corrosion-resistant layer is arranged, so that the parts possibly contacted with the medium channel are wrapped, the corrosion of metal parts is avoided, the product can act under the working condition of corrosive medium, the adaptation range of the product is wide, and the sealing is reliable. The third corrosion-resistant layer is respectively attached to the first corrosion-resistant layer and the second corrosion-resistant layer to realize sealing of a product, the sealing is reliable, and particularly, axial sealing is adopted at the valve rod (the axial sealing means that the third corrosion-resistant layer is pressed against the first corrosion-resistant layer by axial force, the direction of force received by the first sealing surface is axially parallel to the valve rod and defined as axial sealing at the moment), and the sealing is face sealing, so that the coaxiality of the valve rod is not required to be guaranteed, the requirement on the processing precision of the product is low, the product is convenient to install, and the service life is long. The invention also has the advantages of simple structure, convenient assembly, reliable sealing, long service life and the like.
The valve rod 2 on be equipped with valve rod fender shoulder 21, first corrosion-resistant layer 5 include valve rod vertical portion 51 and locate valve rod portion of bending 52 of valve rod fender shoulder 21 department, third corrosion-resistant layer 7 on be equipped with valve rod portion of bending 52 looks laminating first sealing portion 71, with valve rod vertical portion 51 looks laminating second sealing portion 72, first sealing portion 71 with valve rod portion of bending 52, second sealing portion 72 and valve rod vertical portion 51 cooperate and form first sealed face 8. By the arrangement, even if a medium is written at the valve seat, the medium still needs to leak from the valve rod through the second sealing part, the first sealing part and the inner wall of the third corrosion-resistant layer, namely three layers of surfaces are in contact, so that the product is sealed reliably, and particularly the first sealing part is pressed by axial force and is reliably attached to the bent part of the valve rod, so that the product is sealed reliably.
The valve body 4 is provided with a valve body stop shoulder 42, the second corrosion-resistant layer 6 is provided with a valve body bending part 61 at the valve body stop shoulder 42, the third corrosion-resistant layer 7 is provided with a third sealing part 73 attached to the valve body bending part 61, and the third sealing part 73 and the valve body bending part 61 are mutually matched to form a second sealing surface 9. Such a construction makes the valve cover and the valve body sealed reliably.
The valve rod vertical part 51 and the valve rod bending part 52 are mutually perpendicular. Therefore, the oil duct is increased when leakage occurs, namely the contact surface is required to be destroyed to leak, and the product is sealed reliably.
The valve cover 3 is provided with a step 31, and the valve cover 3 is respectively attached to the second corrosion-resistant layer 6 and the first corrosion-resistant layer 5 through the end face and the step 31 of the valve cover 7. The first, second and third sealing parts of the third corrosion-resistant layer are extruded by the arrangement of the end face of the valve cover and the step, so that the sealing surfaces are simply attached and stressed, and the sealing performance of the product is good.
The compressing mechanism 10 comprises a gland 11, a sealing element 12 and a lock nut 13, wherein the sealing element 12 is sleeved outside the valve rod 2 and is respectively attached to the valve rod 2 and the third corrosion-resistant layer 7, an elastic element 14 is arranged between the lock nut 13 and the gland 11, and the elastic element 14 has a movement trend that the sealing element 12 is compressed by the gland 11 and is respectively attached to the valve rod 2 and the third corrosion-resistant layer 7. The structure can provide pressure for the third corrosion-resistant layer in real time, so that the sealing surface is in a stressed fit sealing state, and the product is sealed reliably. Specifically, the elastic member 14 is a disc spring.
The gland 11 is sleeved outside the sealing element 12, and the gland 11 is provided with an inclined plane 111 which is attached to the sealing element 12. Specifically, the sealing element 12 is arranged above the third corrosion-resistant layer 7, and an O-ring 15 is arranged on the sealing element 12. According to the invention, the inclined plane is adopted to push the sealing element, so that the sealing element receives inclined force, and the inclined force is respectively used for pressing the first sealing part of the third corrosion-resistant layer in the decomposition direction of the inclined force, so that the first sealing surface is reliably sealed, the sealing element is attached to the valve rod, further valve rod sealing is realized, leakage from the valve rod is avoided, and the sealing performance of a product is good.
The valve body 4 is provided with a corrosion-resistant valve seat 43, and the corrosion-resistant valve seat 43 is matched with the first corrosion-resistant layer 5, the second corrosion-resistant layer 6 and the third corrosion-resistant layer 7 to form a cavity 44. The arrangement of the cavity can accommodate particles in the medium, so that the abrasion of a valve seat and the explosion of a cylinder caused by overhigh pressure in a system are avoided.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The skilled person will know: while the invention has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the invention, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.
Claims (7)
1. A valve rod axial sealing ball valve comprises a ball body (1), a valve rod (2) connected with the ball body (1), a valve cover (3) and a valve body (4), and is characterized in that a medium channel (41) is arranged on the valve body (4), the ball body (1) is arranged in the medium channel (41), the ball body (1) is provided with a first position for blocking medium circulation in the medium channel (41) when closed and a second position for enabling the medium channel (41) to be conducted when opened, the ball body (1) is provided with a first corrosion-resistant layer (5), the first corrosion-resistant layer (5) is lined on the ball body (1) and extends to the valve rod (2), the valve body (4) is provided with a second corrosion-resistant layer (6), a third corrosion-resistant layer (7) is arranged between the valve body (3) and the valve body (4), the third corrosion-resistant layer (7) is attached to the first corrosion-resistant layer (5) to form a first sealing surface (8) and a second position for enabling the medium channel (41) to be conducted when opened, the first sealing surface (8) is inverted in cross section, the first corrosion-resistant layer (5) is attached to the third corrosion-resistant layer (7) is provided with a third corrosion-resistant layer (7) which is attached to the second compression mechanism (7), valve rod (2) on be equipped with valve rod fender shoulder (21), first corrosion-resistant layer (5) include valve rod vertical portion (51) and locate valve rod fender shoulder (21) department valve rod portion of bending (52), third corrosion-resistant layer (7) on be equipped with first sealing portion (71) laminating mutually with valve rod portion of bending (52), with valve rod vertical portion (51) second sealing portion (72) laminating mutually, first sealing portion (71) and valve rod portion of bending (52), second sealing portion (72) and valve rod vertical portion (51) cooperate and form first sealed face (8), valve body (4) on be equipped with valve body fender shoulder (42), second corrosion-resistant layer (6) be equipped with valve body portion (61) in valve body fender shoulder (42), third corrosion-resistant layer (7) on be equipped with valve body portion of bending (61) laminating mutually second sealing portion (73), third sealing portion (73) and valve body portion (61) cooperate and form sealed face (8) of first sealing face (31), second corrosion-resistant layer (6) are equipped with respectively, valve gap (3) and third corrosion-resistant layer (7) are equipped with one and one end face (31).
2. A valve stem axial seal ball valve according to claim 1, wherein said valve stem vertical portion (51) and said valve stem bent portion (52) are disposed perpendicularly to each other.
3. The axial sealing ball valve for the valve rod according to claim 1, wherein the pressing mechanism (10) comprises a pressing cover (11), a sealing element (12) and a locking nut (13), the sealing element (12) is sleeved outside the valve rod (2) and respectively attached to the valve rod (2) and the third corrosion-resistant layer (7), an elastic element (14) is arranged between the locking nut (13) and the pressing cover (11), and the elastic element (14) has a movement trend of pressing the sealing element (12) through the pressing cover (11) and enabling the sealing element (12) to be attached to the valve rod (2) and the third corrosion-resistant layer (7) respectively.
4. A valve rod axial sealing ball valve according to claim 3, characterized in that the gland (11) is sleeved outside the sealing element (12), and the gland (11) is provided with an inclined plane (111) which is jointed with the sealing element (12).
5. A valve stem axial seal ball valve according to claim 3, characterized in that said seal (12) is provided above the third corrosion resistant layer (7), said seal (12) being provided with an O-ring (15).
6. A valve stem axial seal ball valve according to claim 3 wherein said resilient member (14) is a disc spring.
7. The axial sealing ball valve of the valve rod according to claim 1, characterized in that the valve body (4) is provided with a corrosion-resistant valve seat (43), and the corrosion-resistant valve seat (43) is matched with the first corrosion-resistant layer (5), the second corrosion-resistant layer (6) and the third corrosion-resistant layer (7) to form a cavity (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631877.5A CN109357035B (en) | 2018-12-29 | 2018-12-29 | Axial sealing ball valve of valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811631877.5A CN109357035B (en) | 2018-12-29 | 2018-12-29 | Axial sealing ball valve of valve rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109357035A CN109357035A (en) | 2019-02-19 |
| CN109357035B true CN109357035B (en) | 2023-12-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811631877.5A Active CN109357035B (en) | 2018-12-29 | 2018-12-29 | Axial sealing ball valve of valve rod |
Country Status (1)
| Country | Link |
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| CN (1) | CN109357035B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081193B (en) * | 2019-04-30 | 2021-01-15 | 浙江东信阀门有限公司 | Plastic lining regulating valve |
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