CN110715072A - Ultra-large-diameter all-welded ball valve for long-distance pipeline - Google Patents
Ultra-large-diameter all-welded ball valve for long-distance pipeline Download PDFInfo
- Publication number
- CN110715072A CN110715072A CN201810754929.1A CN201810754929A CN110715072A CN 110715072 A CN110715072 A CN 110715072A CN 201810754929 A CN201810754929 A CN 201810754929A CN 110715072 A CN110715072 A CN 110715072A
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- cap
- ball
- valve
- middle shaft
- valve body
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- Pending
Links
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- WUJISAYEUPRJOG-UHFFFAOYSA-N molybdenum vanadium Chemical compound [V].[Mo] WUJISAYEUPRJOG-UHFFFAOYSA-N 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000006163 transport media Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 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
- 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
- F16K5/0673—Composite packings
-
- 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
-
- 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
- F16K27/10—Welded housings
- F16K27/107—Welded housings for taps or cocks
-
- 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
- F16K5/0689—Packings between housing and plug
-
- 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
Abstract
The invention relates to the technical field of valve manufacturing, in particular to an ultra-large-diameter long pipeline all-welded ball valve which comprises a valve body and extension pipes, wherein the extension pipes are arranged on two sides of the valve body, a ball is arranged in the valve body, a label is arranged on the outer surface of the ball, one end of each extension pipe extends into the extension pipe from two sides of the valve body to be connected with a spherical surface, a sealing cover is arranged at the other end of each extension pipe, a cylindrical central shaft extending out of the valve body is upwards arranged on the upper portion of the ball, a bonnet part is arranged at the top end of the central shaft and comprises a bonnet part and a bonnet rod part, the bonnet part and the bonnet rod part are manufactured by adopting an integral forming technology, the cross section of the bonnet part is in a regular hexagon shape, a cylindrical groove is arranged in the middle of the bonnet part and extends downwards to form an inner cavity in the, the joint part of the cover-shaped nut and the top of the middle shaft is provided with a handle extending outwards, and a positioning pin is arranged at the connecting position of the handle and the middle shaft.
Description
Technical Field
The invention relates to the technical field of valve manufacturing, in particular to an ultra-large-diameter all-welded ball valve for a long-distance pipeline.
Background
Valves are plumbing accessories used to open and close a pipe, control flow direction, regulate and control parameters of the transport medium (temperature, pressure and flow). According to their function, they can be classified into shut-off valves, check valves, regulating valves, and the like. The valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like.
The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The valves are further classified into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, dual-phase steel valves, plastic valves, nonstandard valves, etc. according to the material.
The valve seat of the ball valve is composed of a Teflon carbide sealing ring and a disk spring, so that the ball valve has strong adaptability to pressure and temperature changes, and cannot generate any leakage slip in the range of marked pressure and temperature. The integral welded ball valve is generally formed by pressing a carbon steel seamless steel pipe, has good sealing performance and corrosion resistance, and is widely applied to the field of long-distance pipelines such as natural gas, petroleum, heat supply, chemical engineering, thermal power grids and the like. However, the existing ball valve has great limitation and cannot meet the requirement of modern industrial production.
At present, the demand of ultra-large-diameter all-welded ball valves for long-distance pipelines of heat supply projects in various big cities is increased day by day, and due to the limitation of domestic technology and manufacturing level, required valves are mainly imported, so that the project cost is increased.
Disclosure of Invention
The invention aims to break the monopoly of foreign countries and lead the urban heat supply ultra-large caliber all-welded ball valve to be localized, and the service temperature of the product is as follows: -29-200 ℃, suitable media: the valve body is formed by welding steel pipes, can realize opening and emergency shutoff on a pipeline, has simple structure and good sealing performance, has small driving moment, is simple and convenient to operate, is easy to realize quick opening and closing, and has a service life as long as 30 years.
In order to achieve the purpose, the invention discloses an ultra-large-caliber long pipeline all-welded ball valve, which adopts the following specific technical scheme:
an ultra-large-diameter all-welded ball valve for a long pipeline comprises a valve body and an extension pipe, wherein the two sides of the valve body are respectively provided with the extension pipe, a ball is arranged in the valve body, the outer surface of the ball is provided with a label, one end of the extension pipe extends into the extension pipe from the two sides of the valve body respectively and is connected with the spherical surface, the other end of the extension pipe is provided with a sealing cover, the upper part of the ball extends upwards to be provided with a cylindrical middle shaft which exceeds the valve body, the top end of the middle shaft is a valve cap part, the valve cap comprises a cap top part and a cap rod part, the cap top part and the cap rod part are manufactured by adopting an integral molding technology, the cross section of the cap top part is a regular hexagon, a cylindrical groove is arranged in the middle of the cap top part and extends downwards to form an inner cavity in the cap rod part, the upper part of the, the handle is provided with the locating pin with centraxonial hookup location effect further, the valve body internal diameter is 1600mm, the connecting portion between ball and the centraxonial is provided with the flow adjusting plate, the flow adjusting plate includes the flow adjusting plate body that metal material made, the whole oval shape of flow adjusting plate body, the middle part of flow adjusting plate body transversely is provided with a recess, the length of recess equals half of flow adjusting plate body length, evenly distributed has 12 flow adjusting holes on the flow adjusting plate, the valve body adopts No. 20 steel material that the carbon content is 0.2% to make, the centraxonial adopts 20Cr13 material to make.
The invention further improves the structure, a circle of rectangular protrusions are arranged on the outer side of the cap rod part, the upper end and the lower end of the cap top part are designed in a round angle mode, the angle alpha of the round angle is 15 degrees, the ratio of the height h1 from the upper end to the lower end of the cap top part to the height h2 of the whole valve cap is 1:3, the ratio of the height h4 from the upper end to the bottom of the cap rod part to the height h3 from the lower end of the protrusion to the bottom of the cap rod part is 3:1, and the ratio of the outer diameter h5 of the regular hexagon section of the cap top part to the height h2 of the whole valve: 1.
the invention is further improved, a circle of middle shaft sleeve is arranged on the peripheral surface of the middle shaft, and a middle shaft flat gasket is arranged at the connecting part of the middle shaft and the ball.
The invention is further improved, and a flat gasket, a belleville spring, a ball gasket seat, an O-shaped ring and a ball gasket are sequentially arranged between the extension pipe and the ball.
The invention further improves that a connecting part between the upper part of the middle shaft and the middle shaft sleeve is sequentially provided with a middle shaft check ring, a middle shaft O-shaped ring and a shaft sleeve from bottom to top.
The invention further improves the structure that a retaining washer is arranged between the middle shaft and the cap nut, and the thrust washer is arranged at the upper part of the handle.
The invention is further improved, and a rubber sleeve is sleeved outside the tail end of the handle and is set as a handle rubber sleeve.
The invention has the beneficial effects that: compared with the existing check valve, the check valve has the advantages that the valve bonnet is improved, so that the check valve is firmer, better in sealing performance and longer in service life.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic view of the structure of the bonnet of the present invention.
Fig. 3 is a schematic cross-sectional view of the top of the cap.
Fig. 4 is an enlarged schematic view of a portion a in fig. 1.
Fig. 5 is an enlarged schematic view of a portion B in fig. 1.
Fig. 6 is a schematic structural view of the flow regulating plate of the present invention.
In the figure, 1-sealing cover, 2-extension tube, 3-valve body, 4-flat gasket, 5-belleville spring, 6-ball gasket seat, 7-O-ring, 8-ball gasket, 9-ball, 10-middle shaft flat gasket, 11-middle shaft sleeve, 12-middle shaft, 13-middle shaft retainer ring, 14-middle shaft O-ring, 15-shaft sleeve, 16-positioning pin, 17-handle, 18-backstop gasket, 19-cover nut, 20-handle rubber sleeve, 21-label, 22-valve cap, 221-cap top part, 222-cap rod part, 223-protrusion, 224-inner cavity, 225-groove, 23-flow regulating plate, 2301-flow regulating plate body, 2302-groove and 2303-flow regulating hole.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
Example (b): as shown in fig. 1, 2, 3, 4 and 5, an ultra-large diameter all-welded ball valve for long pipelines comprises a valve body 3 and an extension pipe 2, wherein two sides of the valve body 3 are respectively provided with the extension pipe 2, a ball 9 is arranged inside the valve body 3, the outer surface of the ball 9 is provided with a label 21, one end of the extension pipe 2 extends into the extension pipe from two sides of the valve body 3 to be connected with the surface of the ball 9, the other end of the extension pipe 2 is provided with a sealing cover 1, the upper part of the ball 9 is provided with a cylindrical central shaft 12 extending out of the valve body 3, the top of the central shaft 12 is a valve cap 22, the valve cap 22 comprises a cap top part 221 and a cap rod part 222, the cap top part 221 and the cap rod part 222 are manufactured by adopting an integral molding technology, the cross section of the cap top part 221 is a regular hexagon, a cylindrical groove 225 extends downwards in the middle of the cap top, the outer side of the cap stem part 222 is provided with a circle of rectangular protrusions 223, the upper end and the lower end of the cap top part 221 are designed by round corners, the angle alpha of the round corners is 15 degrees, the ratio of the height h1 from the upper end to the lower end of the cap top part 221 to the height h2 of the whole valve cap is 1:3, the ratio of the height h4 from the upper end to the bottom of the cap stem part 222 to the height h3 from the lower end of the protrusion 223 to the bottom of the cap stem is 3:1, and the ratio of the outer diameter h5 of the regular hexagon section of the cap top part 221 to the height h2 of the whole valve cap 22 is 2: 1, a cap nut 19 is connected with the upper part of a cap top part 221 through threads, the cap nut 19 is connected with a middle shaft 12 through threads, a handle 17 which extends outwards is arranged at the joint of the cap nut 19 and the top of the middle shaft 12, a positioning pin 16 is arranged at the connecting position of the handle 17 and the middle shaft 12 to play a role in further positioning and fixing, a circle of middle shaft sleeve 11 is arranged on the peripheral surface of the middle shaft 12, a middle shaft flat cushion 10 is arranged at the connecting part of the middle shaft 12 and a ball 9, a flat cushion 4, a butterfly spring 5 and a ball cushion seat 6 are sequentially arranged between an extension pipe 2 and the ball 9, the connecting part between the upper part of the middle shaft 12 and the middle shaft sleeve 11 is sequentially provided with a middle shaft retainer ring 13, a middle shaft O-shaped ring 14 and a shaft sleeve 15 from bottom to top, a backstop washer 18 is arranged between the middle shaft 12 and a cover nut 19, the thrust washer 18 is arranged on the upper part of a handle 17, and a rubber sleeve is sleeved outside the tail end of the handle 17 and is set as a handle rubber sleeve 20.
In this embodiment, a flow adjusting plate 23 is disposed at a connecting portion between the ball 9 and the middle shaft 12, the flow adjusting plate 23 includes a flow adjusting plate body 2301 made of a metal material, the flow adjusting plate body 2301 is oval in shape, a groove 2302 is transversely disposed at a middle portion of the flow adjusting plate body 2301, a length of the groove 2302 is equal to a half of a length of the flow adjusting plate body 2301, and 12 flow adjusting holes 2303 are uniformly distributed on the flow adjusting plate 23
In the embodiment, the valve body 3 is made of 20 # steel material with 0.2% carbon content, the middle shaft 12 is made of 20Cr13 material, and the inner diameter of the valve body 3 is 1600 mm.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides an ultra-large-diameter long-distance pipeline all-welded ball valve, its characterized in that includes valve body and extension pipe, the both sides of valve body respectively are provided with an extension pipe, the inside ball that is provided with of valve body, the surface of ball is provided with the label, the one end of extension pipe is followed respectively the both sides of valve body stretch into its inside with the sphere links to each other, the other end of extension pipe is provided with sealed lid, ball upper portion upwards extends to be provided with a cylindrical axis surpass the valve body part, centraxonial top is the valve cap part, the valve cap includes cap portion and cap pole part, cap portion with cap pole part adopts integrated into one piece technology to make, cap portion cross-section is regular hexagon, cap portion middle part has a cylindrical recess downwardly extending to form an inner chamber in the cap pole part inside, cap portion top part top threaded connection has the cap type nut, the utility model discloses a carbon-containing carbon flow regulating valve, including axis, bent axle, cover type nut with the axis adopts threaded connection, cover type nut with the joint portion at axis top is provided with the outside handle that extends, the handle with centraxonial hookup location is provided with the locating pin and plays further location fixed action, the valve body internal diameter is 1600mm, the ball with connecting portion between the axis are provided with the flow regulating plate, the flow regulating plate body that the flow regulating plate made including metal material, the whole oval shape that is of flow regulating plate body, flow regulating plate body middle part transversely is provided with a recess, and the length of recess equals half of flow regulating plate body length, and evenly distributed has 12 flow regulating holes on the flow regulating plate, the valve body adopts the carbon content to make for No. 20 steel materials of 0.2%, the axis adopts 20Cr 13.
2. The ultra large diameter long pipeline all-welded ball valve according to claim 1, wherein the outer side of the cap rod part is provided with a circle of rectangular protrusions, the upper end and the lower end of the cap top part are designed by round corners, the angle α of the round corners is 15 °, the ratio of the height h1 from the upper end to the lower end of the cap top part to the height h2 of the whole valve cap is 1:3, the ratio of the height h4 from the upper end of the protrusions to the bottom of the cap rod part to the height h3 from the lower end of the protrusions to the bottom of the cap rod is 3:1, and the ratio of the outer diameter h5 of the regular hexagonal cross section of the cap top part to the height h2 of the whole valve cap is 2: 1.
3. the ultra-large diameter long pipeline all-welded ball valve according to claim 2, wherein a circle of middle shaft sleeve is arranged on the outer peripheral surface of the middle shaft, and a middle shaft flat gasket is arranged at the connecting part of the middle shaft and the ball.
4. The ultra-large diameter long pipeline all-welded ball valve according to claim 3, wherein a flat gasket, a belleville spring, a ball gasket seat, an O-shaped ring and a ball gasket are sequentially arranged between the extension pipe and the ball.
5. The all-welded ball valve for the ultra-large-diameter long-distance pipeline according to claim 4, wherein a middle shaft retainer ring, a middle shaft O-shaped ring and a shaft sleeve are sequentially arranged at a connecting part between the upper part of the middle shaft and the middle shaft sleeve from bottom to top.
6. The ultra-large-caliber long-distance pipeline all-welded ball valve as claimed in claim 5, wherein a retaining washer is arranged between the middle shaft and the cap nut, and the retaining washer is arranged at the upper part of the handle.
7. The ultra-large-caliber long pipeline all-welded ball valve according to any one of claims 1 to 6, wherein a rubber sleeve is sleeved outside the tail end of the handle and is set as a handle rubber sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810754929.1A CN110715072A (en) | 2018-07-11 | 2018-07-11 | Ultra-large-diameter all-welded ball valve for long-distance pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810754929.1A CN110715072A (en) | 2018-07-11 | 2018-07-11 | Ultra-large-diameter all-welded ball valve for long-distance pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110715072A true CN110715072A (en) | 2020-01-21 |
Family
ID=69208894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810754929.1A Pending CN110715072A (en) | 2018-07-11 | 2018-07-11 | Ultra-large-diameter all-welded ball valve for long-distance pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110715072A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504216A (en) * | 2017-09-28 | 2017-12-22 | 江苏威尔迪威阀业有限公司 | A kind of novel gas ball valve |
| CN107542945A (en) * | 2017-09-28 | 2018-01-05 | 江苏威尔迪威阀业有限公司 | A kind of improved all-welded ball valve of bonnet |
| CN107642616A (en) * | 2017-09-28 | 2018-01-30 | 江苏威尔迪威阀业有限公司 | One kind adjusts stream all-welded ball valve |
| CN107701757A (en) * | 2017-09-28 | 2018-02-16 | 江苏威尔迪威阀业有限公司 | A kind of flow regulating valve |
| CN107763239A (en) * | 2017-09-28 | 2018-03-06 | 江苏威尔迪威阀业有限公司 | A kind of new full welded check valve |
-
2018
- 2018-07-11 CN CN201810754929.1A patent/CN110715072A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504216A (en) * | 2017-09-28 | 2017-12-22 | 江苏威尔迪威阀业有限公司 | A kind of novel gas ball valve |
| CN107542945A (en) * | 2017-09-28 | 2018-01-05 | 江苏威尔迪威阀业有限公司 | A kind of improved all-welded ball valve of bonnet |
| CN107642616A (en) * | 2017-09-28 | 2018-01-30 | 江苏威尔迪威阀业有限公司 | One kind adjusts stream all-welded ball valve |
| CN107701757A (en) * | 2017-09-28 | 2018-02-16 | 江苏威尔迪威阀业有限公司 | A kind of flow regulating valve |
| CN107763239A (en) * | 2017-09-28 | 2018-03-06 | 江苏威尔迪威阀业有限公司 | A kind of new full welded check valve |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20200121 |