CN111765254A - Liquid nitrogen cold-charging valve seat structure of gray iron stop valve - Google Patents
Liquid nitrogen cold-charging valve seat structure of gray iron stop valve Download PDFInfo
- Publication number
- CN111765254A CN111765254A CN202010546734.5A CN202010546734A CN111765254A CN 111765254 A CN111765254 A CN 111765254A CN 202010546734 A CN202010546734 A CN 202010546734A CN 111765254 A CN111765254 A CN 111765254A
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- Prior art keywords
- valve
- liquid nitrogen
- cover
- packing
- valve seat
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- Pending
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000007788 liquid Substances 0.000 title claims abstract description 39
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 35
- 229910001060 Gray iron Inorganic materials 0.000 title claims abstract description 20
- 238000012856 packing Methods 0.000 claims abstract description 43
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims description 24
- 238000004804 winding Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 14
- 239000004677 Nylon Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B4/00—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
- F16B4/006—Shrinkage connections, e.g. assembled with the parts being at different temperature
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- 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
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to the technical field of liquid nitrogen cooling, in particular to a liquid nitrogen cooling valve seat structure of an ash iron stop valve, which comprises a valve body, wherein a valve seat body is arranged in an inner hole of the valve body, a valve flap body is arranged on the top of the valve seat body in a threaded manner, a valve flap cover is connected on the top of the valve flap body in a threaded manner, a split ring is arranged below the valve flap cover, the valve flap is connected to a valve rod through the valve flap cover and the split ring, the top of the valve body is fixedly connected with a valve cover through a stud, the top of the valve cover is connected with a large nut through a bolt, a hand wheel is connected on the top of the valve rod in a threaded. This grey iron stop valve liquid nitrogen cold packing disk seat structure through the interference fit between the disk seat body and the valve body, and the disk seat body valve body of packing into under the cold contraction state, with valve body interference fit when resumeing the normal atmospheric temperature, reaches grey iron stop valve liquid nitrogen cold packing disk seat sealed effect, has avoided the sealed face department build-up welding martensitic stainless steel's of traditional valve body problem.
Description
Technical Field
The invention relates to the technical field of liquid nitrogen cold charging, in particular to a liquid nitrogen cold charging valve seat structure of a gray iron stop valve.
Background
The stop valve, also called stop valve, is the most widely used valve, and it is popular because the friction between the sealing surfaces is small in the opening and closing process, it is durable, the opening height is not large, it is easy to manufacture, it is convenient to maintain, it is not only suitable for middle and low pressure, but also suitable for high pressure. The closing principle of the stop valve is that the sealing surface of the valve clack is tightly attached to the sealing surface of the valve seat by means of the pressure of the valve rod, and the medium is prevented from flowing.
The valve plays an important role in cutting off and throttling the medium in the pipeline where the valve is located, the stop valve is used as an extremely important cut-off valve, the sealing is realized by applying torque to the valve rod and applying pressure to the valve clack in the axial direction of the valve rod to make the sealing surface of the valve clack tightly attached to the sealing surface of the valve seat and prevent the leakage of medium along the gap between the sealing surfaces, because the base material of the valve is gray iron GG25, the welding performance of the material is poor, the material of the valve sealing surface is required to be martensitic stainless steel, the welding effect is poor when the martensitic stainless steel is welded on the GG25 material, under the condition of overlarge pressure intensity inside the valve, the weak fixing structure easily causes the sealing surface of the valve to fail to have sealing effect, and some current valve inner structure are mostly the integral type, dismantle inconvenient or some structures of inside can't dismantle, in view of this, we provide a grey iron stop valve liquid nitrogen cold charge disk seat structure.
Disclosure of Invention
The invention aims to provide a liquid nitrogen cold-installed valve seat structure of a gray iron stop valve, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an ash iron stop valve liquid nitrogen cold charge disk seat structure, includes the valve body, the inner wall joint of valve body has the disk seat body, the top screw thread of the disk seat body is provided with the valve clack body, the top threaded connection of the valve clack body has the valve clack lid, be provided with below the valve clack lid and run from opposite directions the ring, there are valve clack lid and valve clack spot welding at the top of running from opposite directions the ring, the valve clack passes through the valve clack lid and runs from opposite directions the ring and connect on the valve rod, stud fixedly connected with valve gap is passed through at the top of valve body, there is big nut at the top of valve gap through bolted connection, the top threaded connection of valve rod has the hand wheel, the top joint of hand wheel has the packing ring.
In a preferred embodiment, the valve seat body is provided in a cylindrical shape, and the valve seat body is made of martensitic stainless steel.
In a preferred embodiment, the top of the valve body is clamped with a winding gasket, and the top of the winding gasket is contacted with the bottom of the valve cover.
In a preferred embodiment, the surface of the valve rod is rotatably connected with the inner wall of the valve cover, the inner wall of the large nut is in threaded connection with the surface of the valve rod, and the gasket is positioned between the hand wheel and the small nut.
As a preferred embodiment, the packing mechanism includes a packing pressing plate, a packing pressing sleeve is clamped at the bottom of the packing pressing plate, a packing area is clamped at the bottom of the packing pressing sleeve, a fork bolt is connected to the right side of the packing pressing plate through a thread, an elastic cylindrical pin is arranged at the bottom of the fork bolt, and the inner wall of the packing pressing plate is in contact with the surface of the valve rod.
In a preferred embodiment, the packing pressing sleeve and the inner wall of the packing area are in contact with the surface of the valve rod, the top of the forked bolt is sleeved with the bottom of the washer, and the top of the forked bolt is in threaded connection with the inner wall of the small nut.
Compared with the prior art, the invention has the beneficial effects that:
1. this grey iron stop valve liquid nitrogen cold-packed disk seat structure, scribble metal fixed seal glue at valve body hole and disk seat body external diameter, put into the liquid nitrogen heat-preserving container with the disk seat body, liquid nitrogen liquid level position needs the submergence disk seat body, the liquid nitrogen has carried out the cooling effect to the disk seat body, the disk seat body cools off the shrink fast in the liquid nitrogen, put into the valve body hole fast with the disk seat body that cools off, and flatten the disk seat body with the nylon backing plate, test valve body and disk seat body fitting surface department have leak in on the pressure testing machine, through design processing martensite stainless steel valve seat body, disk seat body and valve body interference fit, the valve body is packed into under the cold shrinkage state to the disk seat body, when resumeing normal atmospheric temperature with valve body interference fit, reach grey iron stop valve liquid nitrogen cold-packed disk seat sealing effect, the martensite problem.
2. This grey iron stop valve liquid nitrogen cold charge disk seat structure, to the valve rod application moment of torsion, the valve rod is exerted pressure to the valve clack body on the axial direction, makes the sealed face of valve clack body and the sealed face of disk seat body closely laminate, prevents that the medium from leaking along the gap between the sealed face, reaches the effect to the dismouting of being convenient for of valve body inner structure through setting up big nut and little nut, and sets up packing mechanism and packing ring and has reached the better sealed effect to the valve body is inside.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the packing mechanism according to the present invention;
fig. 3 is a schematic front view of a valve seat body according to the present invention.
In the figure: 1. a valve body; 2. a valve seat body; 3. a valve flap body; 4. the circular rings are split; 5. a valve flap cover; 6. a valve stem; 7. a stud; 8. a valve cover; 9. a large nut; 10. a hand wheel; 11. a gasket; 12. a small nut; 13. a filling mechanism; 131. a packing press plate; 132. pressing and sleeving the filler; 133. a filler zone; 134. a fork bolt; 135. an elastic cylindrical pin; 14. and (6) winding the gasket.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1-3, a technical solution provided by the present invention is:
a liquid nitrogen cold charging valve seat structure of an ash iron stop valve comprises a valve body 1, a valve seat body 2 is clamped on the inner wall of the valve body 1, a valve clack body 3 is in threaded connection with the top of the valve seat body 2, a split ring 4 is in threaded connection with the top of the valve clack body 3, a valve clack cover 5 is arranged on the top of the split ring 4, the split ring 4 is arranged below the valve clack cover, the valve clack cover 5 on the top of the split ring 4 is in spot welding with the valve clack 3, the valve clack is connected on a valve rod 6 through the valve clack cover and the split ring, a valve cover 8 is fixedly connected with the top of the valve body 1 through a stud 7, a large nut 9 is connected with the top of the valve cover 8 through a bolt, a hand wheel 10 is in threaded connection with the top of the valve rod 6, a gasket 11 is clamped on the top of the hand wheel 10, a small nut 12 is connected, liquid nitrogen liquid level position needs submergence valve seat body 2, and the liquid nitrogen has carried out the cooling effect to valve seat body 2, and valve seat body 2 cools off the shrink fast in the liquid nitrogen, puts into 1 hole of valve body fast with the valve seat body 2 that cools off to flatten valve seat body 2 with the nylon backing plate.
In this embodiment, the shape of the valve seat body 2 sets up to cylindrical, and the material of the valve seat body 2 sets up to the martensitic stainless steel, set up to cylindrical through the shape that sets up the valve seat body 2, the 2 shapes of the refrigerated valve seat body take place to reduce and change, the size of the valve seat body 2 after reducing is less than the hole size in the valve body 1, put into 1 hole of valve body fast with the valve seat body 2 that has cooled, and flatten the valve seat body 2 with the nylon backing plate, make the surface of the valve seat body 2 closely laminate with the downthehole wall of valve body 1, reach the sealed effect of grey iron stop valve liquid nitrogen cold charge disk seat, the problem of locating the surfacing martensitic stainless steel leakproofness and the fixity is relatively poor at the sealed face of.
Further, the top joint of valve body 1 has winding gasket 14, and winding gasket 14's top and valve gap 8's bottom are contacted each other, have winding gasket 14 through the top joint at valve body 1 and reach the sealed effect of valve body 1 with valve gap 8 contact department.
Furthermore, the surface of the valve rod 6 is rotatably connected with the inner wall of the valve cover 8, the inner wall of the large nut 9 is in threaded connection with the surface of the valve rod 6, the gasket 11 is located between the hand wheel 10 and the small nut 12, when the valve rod 6 rotates, the valve rod 6 rotates up and down on the inner wall of the large nut 9, and the gasket 11 is arranged between the hand wheel 10 and the small nut 12, so that the gasket 11 achieves a sealing effect.
It is worth noting that the packing mechanism 13 comprises a packing pressing plate 131, a packing pressing sleeve 132 is clamped at the bottom of the packing pressing plate 131, a packing area 133 is clamped at the bottom of the packing pressing sleeve 132, a fork bolt 134 is in threaded connection with the right side of the packing pressing plate 131, an elastic cylindrical pin 135 is welded at the bottom of the fork bolt 134, the inner wall of the packing pressing plate 131 is in contact with the surface of the valve rod 6, the effect of sealing the joint of the valve cover 8 and the valve rod 6 is achieved by arranging the packing mechanism 13, and the effect of facilitating disassembly of the packing mechanism 13 is achieved by arranging the fork bolt 134.
It is worth to be noted that the inner walls of the packing pressing sleeve 132 and the packing area 133 are in contact with the surface of the valve rod 6, the top of the fork bolt 134 is sleeved with the bottom of the gasket 11, the top of the fork bolt 134 is in threaded connection with the inner wall of the small nut 12, the effect of sealing the surface of the valve rod 6 is achieved by arranging the inner walls of the packing pressing sleeve 132 and the packing area 133 in contact with the surface of the valve rod 6, and the small nut 12 is arranged at the top of the fork bolt 134 to achieve the effect of fixing the fork bolt 134.
When the liquid nitrogen cold-charging valve seat structure of the gray iron stop valve is used, the hand wheel 10 is rotated, the large nut 9 is fixed on the valve cover 8, the rotating hand wheel 10 drives the valve rod 6 to rotate up and down in the large nut 9, so that the effect of moving the valve seat body 2 up and down is achieved, the control of the liquid flow direction is achieved by utilizing the up-and-down movement of the valve seat body 2, metal fixing sealant is coated on the inner hole of the valve body 1 and the outer diameter of the valve seat body 2, the valve seat body 2 is placed into a liquid nitrogen heat-insulating barrel, the valve seat body 2 is required to be immersed at the liquid level position of liquid nitrogen, the liquid nitrogen has the cooling effect on the valve seat body 2, the valve seat body 2 is rapidly cooled and contracted in the liquid nitrogen, the cooled valve seat body 2 is rapidly placed into the inner hole of the valve body 1, the nylon base plate is used for flattening the valve seat body 2, the position of the matching surface of, valve seat body 2 and 1 interference fit of valve body, valve body 1 is packed into to valve seat body 2 under cold contraction state, and with 1 interference fit of valve body when resumeing the normal atmospheric temperature, reach the sealed effect of grey iron stop valve liquid nitrogen cold charge disk seat.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a grey iron stop valve liquid nitrogen cold charge disk seat structure, includes valve body (1), its characterized in that: a valve seat body (2) is arranged on the inner wall of the valve body (1), a valve flap body (3) is arranged on the top of the valve seat body (2), the top of the valve flap body (3) is in threaded connection with a valve flap cover (5), a split ring (4) is arranged below the valve flap cover, the top of the split ring (4) is provided with the valve flap cover (5), spot-welding with a valve clack (3) which is connected with a valve rod (6) through a valve clack cover and a split ring, the top of the valve body (1) is fixedly connected with a valve cover (8) through a double-end stud (7), the top of the valve cover (8) is connected with a large nut (9) through a bolt, the top of the valve rod (6) is connected with a hand wheel (10) through a thread, the top joint of hand wheel (10) has packing ring (11), the top threaded connection of valve rod (6) has little nut (12), the inside of valve gap (8) is provided with filler mechanism (13).
2. The liquid nitrogen cold-charging valve seat structure of the gray iron stop valve according to claim 1, characterized in that: the shape of the valve seat body (2) is set to be cylindrical, and the material of the valve seat body (2) is set to be martensitic stainless steel.
3. The liquid nitrogen cold-charging valve seat structure of the gray iron stop valve according to claim 1, characterized in that: the top joint of valve body (1) has winding gasket (14), the top of winding gasket (14) and the bottom of valve gap (8) contact each other.
4. The liquid nitrogen cold-charging valve seat structure of the gray iron stop valve according to claim 1, characterized in that: the surface of the valve rod (6) is rotationally connected with the inner wall of the valve cover (8), the inner wall of the large nut (9) is in threaded connection with the surface of the valve rod (6), and the gasket (11) is positioned between the hand wheel (10) and the small nut (12).
5. The liquid nitrogen cold-charging valve seat structure of the gray iron stop valve according to claim 1, characterized in that: the packing mechanism (13) comprises a packing pressing plate (131), a packing pressing sleeve (132) is clamped at the bottom of the packing pressing plate (131), a packing area (133) is clamped at the bottom of the packing pressing sleeve (132), a fork bolt (134) is in threaded connection with the right side of the packing pressing plate (131), an elastic cylindrical pin (135) is arranged at the bottom of the fork bolt (134), and the inner wall of the packing pressing plate (131) is in mutual contact fit with the surface of the valve rod (6).
6. The liquid nitrogen cold-charging valve seat structure of the gray iron stop valve according to claim 5, characterized in that: the inner walls of the packing pressing sleeve (132) and the packing area (133) are in mutual contact with the surface of the valve rod (6), the top of the fork bolt (134) is sleeved with the bottom of the gasket (11), and the top of the fork bolt (134) is in threaded connection with the inner wall of the small nut (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546734.5A CN111765254A (en) | 2020-06-16 | 2020-06-16 | Liquid nitrogen cold-charging valve seat structure of gray iron stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546734.5A CN111765254A (en) | 2020-06-16 | 2020-06-16 | Liquid nitrogen cold-charging valve seat structure of gray iron stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111765254A true CN111765254A (en) | 2020-10-13 |
Family
ID=72721683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010546734.5A Pending CN111765254A (en) | 2020-06-16 | 2020-06-16 | Liquid nitrogen cold-charging valve seat structure of gray iron stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111765254A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201416653Y (en) * | 2009-07-09 | 2010-03-03 | 成都凯天电子股份有限公司 | Bellows ball core stop valve |
| CN102022157A (en) * | 2010-10-14 | 2011-04-20 | 广州柴油机厂股份有限公司 | Mounting process of medium-speed high-strength diesel engine cylinder cover water-cooled exhaust valve seat |
| CN102248356A (en) * | 2011-06-21 | 2011-11-23 | 温州市中力阀门有限公司 | Rapid assembly process of integrated high-pressure hard seal ball valve seat |
| CN204828712U (en) * | 2015-08-05 | 2015-12-02 | 杭州凯维阀门集团有限公司 | Stop valve |
| CN205260877U (en) * | 2015-12-17 | 2016-05-25 | 凯喜姆阀门有限公司 | Stop valve with anti -shake ejector half valve clack |
| CN106567936A (en) * | 2016-11-07 | 2017-04-19 | 施瑞德阀门(厦门)有限公司 | Adjustable type elastic ceramic stop valve |
| JP2017172754A (en) * | 2016-03-25 | 2017-09-28 | 共栄バルブ工業株式会社 | Spherical valve for cryogenic temperature |
-
2020
- 2020-06-16 CN CN202010546734.5A patent/CN111765254A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201416653Y (en) * | 2009-07-09 | 2010-03-03 | 成都凯天电子股份有限公司 | Bellows ball core stop valve |
| CN102022157A (en) * | 2010-10-14 | 2011-04-20 | 广州柴油机厂股份有限公司 | Mounting process of medium-speed high-strength diesel engine cylinder cover water-cooled exhaust valve seat |
| CN102248356A (en) * | 2011-06-21 | 2011-11-23 | 温州市中力阀门有限公司 | Rapid assembly process of integrated high-pressure hard seal ball valve seat |
| CN204828712U (en) * | 2015-08-05 | 2015-12-02 | 杭州凯维阀门集团有限公司 | Stop valve |
| CN205260877U (en) * | 2015-12-17 | 2016-05-25 | 凯喜姆阀门有限公司 | Stop valve with anti -shake ejector half valve clack |
| JP2017172754A (en) * | 2016-03-25 | 2017-09-28 | 共栄バルブ工業株式会社 | Spherical valve for cryogenic temperature |
| CN106567936A (en) * | 2016-11-07 | 2017-04-19 | 施瑞德阀门(厦门)有限公司 | Adjustable type elastic ceramic stop valve |
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Application publication date: 20201013 |
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| RJ01 | Rejection of invention patent application after publication |