CN111761302A - Technological method of cryogenic axial flow check valve with online maintenance function - Google Patents
Technological method of cryogenic axial flow check valve with online maintenance function Download PDFInfo
- Publication number
- CN111761302A CN111761302A CN202010475344.3A CN202010475344A CN111761302A CN 111761302 A CN111761302 A CN 111761302A CN 202010475344 A CN202010475344 A CN 202010475344A CN 111761302 A CN111761302 A CN 111761302A
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- China
- Prior art keywords
- valve
- valve body
- valve cover
- cover
- hole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
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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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted 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
- 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
Abstract
A process method of a cryogenic axial flow check valve with an online maintenance function ensures that a U-shaped groove plane of a supporting rib on a valve cover and a U-shaped groove supporting rib of a supporting rib inside a valve body are on the same plane through a processing process and an assembling process, and the supporting rib can be accurately clamped in an annular groove of a flow guide sleeve.
Description
Technical Field
The invention relates to a check valve, in particular to a technical method of a cryogenic axial flow type check valve with an online maintenance function.
Background
In order to realize the on-line detachable function of the axial flow type check valve, the axial flow type check valve is designed into a top-mounted structure. The flow guide sleeve in the valve is designed to be in a floating mode, and is positioned through the mounting support rib in the valve body and the support rib on the valve cover, so that certain machining precision requirements are provided for machining the upper-mounted valve cover. If the upper-mounted valve cover is processed as an independent part, if the plane of the U-shaped groove of the upper-mounted valve cover and the supporting rib of the U-shaped groove of the internal supporting rib of the valve body can not be ensured to be on the same plane, the floating guide sleeve can not be installed.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a process method of a cryogenic axial flow check valve with an online maintenance function.
The technical scheme of the invention is that a technical method of a cryogenic axial flow check valve with an online maintenance function comprises the following processing steps:
firstly, turning a positioning spigot on the plane and the upper part of a valve cover;
and secondly, fixing the valve cover on the square box on the scribing platform. Marking out a central line and a lead of a rib, rotating the square box by 90 degrees to ensure that the rib is vertical to the valve cover, marking out the other central line and the lead of the valve cover, and marking out a connecting line of two opposite leads on the back of the valve cover;
thirdly, turning the flange excircle of the valve cover and a boss positioned with the valve body on a vertical machining center by using a tool and taking a positioning spigot at the upper part of the valve cover as a precise reference;
fourthly, finding a hole center circle for connecting the valve cover and the valve body by using a vertical machining center, and machining a connecting hole and a positioning pin hole;
fifthly, turning the two supporting leg planes at the bottom of the valve body flat, and then processing a spigot, a connecting threaded hole and a positioning pin hole which are positioned with the valve cover on a vertical processing center;
sixthly, installing a valve cover positioning boss in a corresponding positioning spigot of the valve body, and positioning the valve body and the valve cover by using a positioning pin;
and seventhly, mounting the mounted valve body and the valve cover on a horizontal machining center, turning an inner hole in the valve body, and turning an annular groove in the mounting support rib by taking the inner hole as a reference, so that the U-shaped clamping groove of the valve body support rib and the U-shaped clamping groove of the valve cover support rib can be ensured to be on the same plane in the machining process. Because the valve structure length is longer, when processing, the lathe tool can not satisfy and accomplish all porosely processing from a feed direction, in order to guarantee disposable processing, does not adopt the mode of turning the valve body one direction and relocating, adopts the method of lathe tool reverse turning to accomplish processing, has guaranteed the axiality of valve body hole.
The assembly steps are as follows:
firstly, installing a valve seat and a sealing element thereof in an inner cavity of a valve body;
secondly, screwing a valve seat fixer in the valve body, and fixing the valve seat by using a screw according to a certain torque;
thirdly, a guide frame is arranged in the guide sleeve, and the guide frame and the guide sleeve are connected by a fastening piece;
fourthly, installing a flow guide cone at the tail part of the flow guide sleeve;
fifthly, a spring is arranged in a spring mounting groove of the guide frame and is aligned to the spring mounting groove of the valve clack;
sixthly, arranging a pin shaft in a corresponding pin shaft hole in the raised parts of the valve clack and the flow guide sleeve, arranging a thread at the tail part of the pin shaft, and tightening the pretightening force of the spring by using a nut to ensure that the valve clack is opened to a certain position and fixed with the flow guide sleeve;
seventhly, installing the anti-rotation block into the annular groove of the guide groove and fastening the anti-rotation block by using a screw;
eighthly, taking the valve clack assemblies in the third step to the seventh step as assembly assemblies, and clamping the annular grooves of the assembly assemblies onto the U-shaped grooves on the two support ribs of the valve body;
ninth, loosening the nut on the pin shaft to enable the action force of the spring to act on the valve clack, resetting the valve clack, and limiting the valve clack by installing two positioning pins on the left and right of the nut;
tenth step, installing a positioning pin on the valve body, and aligning the positioning pin hole of the valve cover with the positioning pin on the valve body for installation;
eleventh, when the lower plane of the valve cover is completely attached to the upper plane of the valve body, the supporting rib U-shaped groove on the valve cover is clamped to the annular groove of the flow guide sleeve;
and step ten, mounting a bolt between the valve cover and the valve body connecting hole, and fastening the bolt to complete valve assembly.
The valve cover has the beneficial effects that the plane of the U-shaped groove of the support rib on the valve cover and the support rib of the U-shaped groove of the support rib in the valve body are ensured to be on the same plane, and the valve cover can be accurately clamped in the annular groove of the flow guide sleeve.
Drawings
FIG. 1 is a schematic view of a valve cover during a processing step;
FIG. 2 is a schematic drawing of a score line on the valve cover during the processing step;
FIG. 3 is a schematic view of a valve cover processing connection hole and a positioning pin hole in a processing step;
FIG. 4 is a front view of the valve body and bonnet during the machining step;
FIG. 5 is a schematic view of a first step and a second step of the assembly step;
FIG. 6 is a schematic view of the third to seventh steps in the assembly step;
FIG. 7 is a schematic view of the final step in the assembly step;
FIG. 8 is a front view of the valve after assembly;
fig. 9 is a front view a-a cross-sectional view of the valve after assembly.
In the figure: 1. a valve body; 2. a flow guide cone; 3. a flow guide sleeve; 4. a guide shaft; 5. a guide frame; 6. a spring; 7. a bearing; 8. a valve flap; 9. a valve seat retainer; 10. a screw I; 11. a valve seat; 12. a metal wound gasket; 13. flooding and plugging; 14. winding the gasket; 15. a fastener; 16. a valve cover; 17. a pin shaft; 18. a nut; 19. a rotation prevention block; 20. a screw II; 21. a valve cover positioning spigot; 22. the upper plane of the valve cover; 23. a valve cover positioning boss; 24. the valve cover supports the U-shaped groove of the muscle; 25. the valve cover is connected with the connecting hole of the valve body; 26. valve gap locating pin hole.
Detailed Description
As shown in the figure, the processing method of the cryogenic axial flow check valve with the online maintenance function comprises the following processing steps:
firstly, turning a positioning spigot on the plane and the upper part of a valve cover;
and secondly, fixing the valve cover on the square box on the scribing platform. Marking out a central line and a lead of a rib, rotating the square box by 90 degrees to ensure that the rib is vertical to the valve cover, marking out the other central line and the lead of the valve cover, and marking out a connecting line of two opposite leads on the back of the valve cover;
thirdly, turning the flange excircle of the valve cover and a boss positioned with the valve body on a vertical machining center by using a tool and taking a positioning spigot at the upper part of the valve cover as a precise reference;
fourthly, finding a hole center circle for connecting the valve cover and the valve body by using a vertical machining center, and machining a connecting hole and a positioning pin hole;
fifthly, turning the two supporting leg planes at the bottom of the valve body flat, and then processing a spigot, a connecting threaded hole and a positioning pin hole which are positioned with the valve cover on a vertical processing center;
sixthly, installing a valve cover positioning boss in a corresponding positioning spigot of the valve body, and positioning the valve body and the valve cover by using a positioning pin;
and seventhly, mounting the mounted valve body and the valve cover on a horizontal machining center, turning an inner hole in the valve body, and turning an annular groove in the mounting support rib by taking the inner hole as a reference, so that the U-shaped clamping groove of the valve body support rib and the U-shaped clamping groove of the valve cover support rib can be ensured to be on the same plane in the machining process. Because the valve structure length is longer, when processing, the lathe tool can not satisfy and accomplish all porosely processing from a feed direction, in order to guarantee disposable processing, does not adopt the mode of turning the valve body one direction and relocating, adopts the method of lathe tool reverse turning to accomplish processing, has guaranteed the axiality of valve body hole.
The assembly steps are as follows:
firstly, installing a valve seat and a sealing element thereof in an inner cavity of a valve body;
secondly, screwing a valve seat fixer in the valve body, and fixing the valve seat by using a screw according to a certain torque;
thirdly, a guide frame is arranged in the guide sleeve, and the guide frame and the guide sleeve are connected by a fastening piece;
fourthly, installing a flow guide cone at the tail part of the flow guide sleeve;
fifthly, a spring is arranged in a spring mounting groove of the guide frame and is aligned to the spring mounting groove of the valve clack;
sixthly, arranging a pin shaft in a corresponding pin shaft hole in the raised parts of the valve clack and the flow guide sleeve, arranging a thread at the tail part of the pin shaft, and tightening the pretightening force of the spring by using a nut to ensure that the valve clack is opened to a certain position and fixed with the flow guide sleeve;
seventhly, installing the anti-rotation block into the annular groove of the guide groove and fastening the anti-rotation block by using a screw;
eighthly, taking the valve clack assemblies in the third step to the seventh step as assembly assemblies, and clamping the annular grooves of the assembly assemblies onto the U-shaped grooves on the two support ribs of the valve body;
ninth, loosening the nut on the pin shaft to enable the action force of the spring to act on the valve clack, resetting the valve clack, and limiting the valve clack by installing two positioning pins on the left and right of the nut;
tenth step, installing a positioning pin on the valve body, and aligning the positioning pin hole of the valve cover with the positioning pin on the valve body for installation;
eleventh, when the lower plane of the valve cover is completely attached to the upper plane of the valve body, the supporting rib U-shaped groove on the valve cover is clamped to the annular groove of the flow guide sleeve;
and step ten, mounting a bolt between the valve cover and the valve body connecting hole, and fastening the bolt to complete valve assembly.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (1)
1. A technical method of a cryogenic axial flow check valve with an online maintenance function is characterized by comprising the following processing steps:
firstly, turning a positioning spigot on the plane and the upper part of a valve cover;
secondly, fixing the valve cover on a square box on a scribing platform, scribing the central line of a rib and a lead wire of the rib, then rotating the square box by 90 degrees to ensure that the rib is vertical to the valve cover, scribing the other central line of the valve cover and the lead wire of the valve cover, and scribing a connecting line of two opposite lead wires on the back of the valve cover;
thirdly, turning the flange excircle of the valve cover and a boss positioned with the valve body on a vertical machining center by using a tool and taking a positioning spigot at the upper part of the valve cover as a precise reference;
fourthly, finding a hole center circle for connecting the valve cover and the valve body by using a vertical machining center, and machining a connecting hole and a positioning pin hole;
fifthly, turning the two supporting leg planes at the bottom of the valve body flat, and then processing a spigot, a connecting threaded hole and a positioning pin hole which are positioned with the valve cover on a vertical processing center;
sixthly, installing a valve cover positioning boss in a corresponding positioning spigot of the valve body, and positioning the valve body and the valve cover by using a positioning pin;
seventhly, the mounted valve body and the valve cover are mounted on a horizontal machining center, an inner hole in the valve body is turned, and an annular groove in the mounting support rib is turned on the basis of the inner hole, so that the U-shaped clamping groove of the valve body support rib and the U-shaped clamping groove of the valve cover support rib can be ensured to be on the same plane in the machining process, the machining process cannot be completed from one feed direction by a turning tool due to the long length of the valve structure, in order to ensure the one-time machining process, the mode of turning the valve body in one direction for repositioning is not adopted, the turning tool is adopted to complete the machining process, and the coaxiality of the inner hole of the valve body is ensured;
the assembly steps are as follows:
firstly, installing a valve seat and a sealing element thereof in an inner cavity of a valve body;
secondly, screwing a valve seat fixer in the valve body, and fixing the valve seat by using a screw according to a certain torque;
thirdly, a guide frame is arranged in the guide sleeve, and the guide frame and the guide sleeve are connected by a fastening piece;
fourthly, installing a flow guide cone at the tail part of the flow guide sleeve;
fifthly, a spring is arranged in a spring mounting groove of the guide frame and is aligned to the spring mounting groove of the valve clack;
sixthly, arranging a pin shaft in a corresponding pin shaft hole in the raised parts of the valve clack and the flow guide sleeve, arranging a thread at the tail part of the pin shaft, and tightening the pretightening force of the spring by using a nut to ensure that the valve clack is opened to a certain position and fixed with the flow guide sleeve;
seventhly, installing the anti-rotation block into the annular groove of the guide groove and fastening the anti-rotation block by using a screw;
eighthly, taking the valve clack assemblies in the third step to the seventh step as assembly assemblies, and clamping the annular grooves of the assembly assemblies onto the U-shaped grooves on the two support ribs of the valve body;
ninth, loosening the nut on the pin shaft to enable the action force of the spring to act on the valve clack, resetting the valve clack, and limiting the valve clack by installing two positioning pins on the left and right of the nut;
tenth step, installing a positioning pin on the valve body, and aligning the positioning pin hole of the valve cover with the positioning pin on the valve body for installation;
a tenth step; when the lower plane of the valve cover is completely attached to the upper plane of the valve body, the U-shaped groove of the support rib on the valve cover is clamped to the annular groove of the flow guide sleeve;
and step ten, mounting a bolt between the valve cover and the valve body connecting hole, and fastening the bolt to complete valve assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010475344.3A CN111761302B (en) | 2020-05-29 | 2020-05-29 | Technological method of cryogenic axial flow check valve with online maintenance function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010475344.3A CN111761302B (en) | 2020-05-29 | 2020-05-29 | Technological method of cryogenic axial flow check valve with online maintenance function |
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| CN111761302A true CN111761302A (en) | 2020-10-13 |
| CN111761302B CN111761302B (en) | 2022-01-25 |
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| CN202010475344.3A Active CN111761302B (en) | 2020-05-29 | 2020-05-29 | Technological method of cryogenic axial flow check valve with online maintenance function |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03209077A (en) * | 1989-10-13 | 1991-09-12 | Socla Sa | Check valve |
| JP2008095820A (en) * | 2006-10-11 | 2008-04-24 | Taiyo Nippon Sanso Corp | Check valve and low temperature fluid pump |
| CN103302453A (en) * | 2013-06-07 | 2013-09-18 | 浙江坤博机械制造有限公司 | Machining method for valve body of low temperature resistance hard seal check valve |
| CN106838386A (en) * | 2017-03-06 | 2017-06-13 | 合肥通用机械研究院 | It is a kind of can on-line maintenance axial flow type check valve |
| CN206802396U (en) * | 2017-06-09 | 2017-12-26 | 江苏圣泰阀门有限公司 | One kind tilts flap check-valves |
| CN207796187U (en) * | 2018-01-25 | 2018-08-31 | 天津达沃斯阀门有限公司 | A kind of swing check valve |
| CN108612883A (en) * | 2018-07-09 | 2018-10-02 | 君品集团有限公司 | Check-valves |
| CN108673060A (en) * | 2018-05-03 | 2018-10-19 | 苏州跃佳阀门有限公司 | A kind of processing technology of check valve body |
| CN110173579A (en) * | 2019-05-07 | 2019-08-27 | 浙江高中压阀门有限公司 | A kind of fused salt check-valves and its manufacture craft for photo-thermal power generation |
| CN110561115A (en) * | 2019-10-23 | 2019-12-13 | 江苏神通阀门股份有限公司 | assembly method of support guide shaft structure of cryogenic axial flow check valve |
| CN210290866U (en) * | 2019-07-17 | 2020-04-10 | 天兴消防器材有限公司 | Rubber flap check valve |
-
2020
- 2020-05-29 CN CN202010475344.3A patent/CN111761302B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03209077A (en) * | 1989-10-13 | 1991-09-12 | Socla Sa | Check valve |
| JP2008095820A (en) * | 2006-10-11 | 2008-04-24 | Taiyo Nippon Sanso Corp | Check valve and low temperature fluid pump |
| CN103302453A (en) * | 2013-06-07 | 2013-09-18 | 浙江坤博机械制造有限公司 | Machining method for valve body of low temperature resistance hard seal check valve |
| CN106838386A (en) * | 2017-03-06 | 2017-06-13 | 合肥通用机械研究院 | It is a kind of can on-line maintenance axial flow type check valve |
| CN206802396U (en) * | 2017-06-09 | 2017-12-26 | 江苏圣泰阀门有限公司 | One kind tilts flap check-valves |
| CN207796187U (en) * | 2018-01-25 | 2018-08-31 | 天津达沃斯阀门有限公司 | A kind of swing check valve |
| CN108673060A (en) * | 2018-05-03 | 2018-10-19 | 苏州跃佳阀门有限公司 | A kind of processing technology of check valve body |
| CN108612883A (en) * | 2018-07-09 | 2018-10-02 | 君品集团有限公司 | Check-valves |
| CN110173579A (en) * | 2019-05-07 | 2019-08-27 | 浙江高中压阀门有限公司 | A kind of fused salt check-valves and its manufacture craft for photo-thermal power generation |
| CN210290866U (en) * | 2019-07-17 | 2020-04-10 | 天兴消防器材有限公司 | Rubber flap check valve |
| CN110561115A (en) * | 2019-10-23 | 2019-12-13 | 江苏神通阀门股份有限公司 | assembly method of support guide shaft structure of cryogenic axial flow check valve |
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| CN111761302B (en) | 2022-01-25 |
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