CN111570692B - Forming process of large-diameter integrally forged gate valve - Google Patents
Forming process of large-diameter integrally forged gate valve Download PDFInfo
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- CN111570692B CN111570692B CN202010426433.9A CN202010426433A CN111570692B CN 111570692 B CN111570692 B CN 111570692B CN 202010426433 A CN202010426433 A CN 202010426433A CN 111570692 B CN111570692 B CN 111570692B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
- B21K1/205—Making machine elements valve parts rocker arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
- B21K1/24—Making machine elements valve parts valve bodies; valve seats
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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
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/312—Line blinds
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The invention relates to a forming process of a large-diameter integrally forged gate valve, which comprises the following steps of: firstly, integrally forging a valve body of a gate valve; secondly, processing a first valve body sleeve and a second valve body sleeve; inserting a first valve body sleeve and a second valve body sleeve into the valve chamber; the first seat plate sealing ring is clamped between the first valve body sleeve and the first seat plate; the first sleeve seal ring is sandwiched between the first valve body sleeve and the first small diameter annular portion; a second seat plate sealing ring is sandwiched between the second valve body sleeve and the second seat plate; the second sleeve sealing ring is sandwiched between the second body sleeve and the second small diameter annular portion; thirdly, processing a cuboid flashboard; fourthly, processing the valve rod; fifthly, casting or forging the valve cover, wherein the part of the top end of the valve rod, which is positioned outside the top surface of the nut, is connected with a hand wheel through a pin or a key, and the valve rod is driven to rotate by rotating the hand wheel; and a gap between the valve rod and the inner peripheral wall of the boss is filled with filler.
Description
Technical Field
The invention relates to the technical field of casting shells, in particular to a forming process of a large-diameter integrally forged gate valve.
Background
The large-diameter integrally forged gate valve has ideal flow characteristics, when the gate valve is completely opened, the inner wall of a pipeline is smooth, and the resistance to fluid flow is not greater than that of an isometric smooth pipeline, so that the large-diameter integrally forged gate valve is widely applied. But a problem that major diameter solid forged gate valve exists is that sealing capacity is not enough, makes the gate valve produce the strain because the pipeline is used for a long time, and ambient temperature changes and also can lead to gate valve inner structure to produce and warp, and this kind of strain and deformation inevitably can lead to the disk seat of major diameter solid forged gate valve to produce and leak. This leakage is due to uneven support of the load by the valve seat being forced, deformation or local overstressing, which can cause wear or local wear on the grooves of the sealing surfaces.
The prior art solutions to the above problems have generally been to increase the weight of the valve body, use flexible, lightweight seat plates and gate members, and use long tubular valve seats to solve the gate valve distortion problem. However, these solutions of the prior art do not achieve good technical results. For example, the use of a long tubular valve seat generates a side thrust due to friction of the shutter member, warping and deforming the valve seat.
Disclosure of Invention
The invention aims to provide a forming process of a large-diameter integrally forged gate valve, and aims to solve the technical problem of improving the sealing performance of the gate valve.
The invention aims to overcome the defects of the prior art and provides a forming process of a large-diameter integrally forged gate valve, which comprises the following steps:
firstly, integrally forging a valve body of the gate valve, and forming a flow channel extending along the axial direction of the valve body in the center of the valve body; machining a cylindrical valve chamber in a direction perpendicular to the flow passage; processing a first step type annular groove and a second step type annular groove at the intersection position of the flow passage and the valve chamber; the first step type annular groove comprises a first large-diameter annular part and a first small-diameter annular part; the second step type annular groove comprises a second large-diameter annular part and a second small-diameter annular part; machining a first seat plate and a second seat plate spaced apart between the first large diameter ring and the second large diameter ring; a first seat plate and a second seat plate are vertically disposed in the cylindrical valve chamber; a first seat plate hole is formed in the center of the first seat plate; a second seat plate hole is formed in the center of the second seat plate; the first base plate hole and the second base plate hole are aligned with the flow channel;
secondly, processing a first valve body sleeve and a second valve body sleeve; inserting a first valve body sleeve and a second valve body sleeve into the valve chamber; a first through hole is formed in the center of the first valve body sleeve, a second through hole is formed in the center of the second valve body sleeve, and the first through hole and the second through hole are aligned with the flow passage; said first valve body sleeve including a first large diameter sleeve portion and a first small diameter sleeve portion and said second valve body sleeve including a second large diameter sleeve portion and a second small diameter sleeve portion; the first large diameter sleeve part is matched and abutted with the first large diameter annular part; the first small diameter sleeve part is matched and abutted with the first small diameter ring-shaped part; the second large diameter sleeve part is matched and abutted with the second large diameter annular part; the second small-diameter sleeve part is matched and abutted with the second small-diameter annular part; a first seat plate sealing ring groove is formed in the end face, facing the first valve body sleeve, of the first seat plate; a first seat plate sealing ring is arranged in the first seat plate sealing ring groove; the first seat plate sealing ring is clamped between the first valve body sleeve and the first seat plate; a first sleeve sealing ring groove is formed in the end face, facing the first small-diameter annular part, of the first small-diameter sleeve part; a first sleeve sealing ring is arranged in the first sleeve sealing ring groove; the first sleeve sealing ring is clamped between the first valve body sleeve and the first small-diameter annular part; a second seat plate sealing ring groove is formed in the end face, facing the second valve body sleeve, of the second seat plate; a second seat plate sealing ring is arranged in the second seat plate sealing ring groove; the second seat plate sealing ring is clamped between the second valve body sleeve and the second seat plate; a second sleeve sealing ring groove is formed in the end face, facing the second small-diameter annular part, of the second small-diameter sleeve part; a second sleeve sealing ring is arranged in the second sleeve sealing ring groove; the second sleeve sealing ring is clamped between the second valve body sleeve and the second small-diameter annular part;
thirdly, processing a cuboid-shaped gate plate, wherein the interior of the gate plate is of a hollow structure, and a gate plate through hole penetrating through the gate plate along a direction perpendicular to the side wall is formed in the side wall of the gate plate; the top of the flashboard is provided with a cylindrical connecting part, and the inner peripheral wall is provided with an internal thread;
fourthly, processing a valve rod, wherein an external thread is processed on the peripheral wall of one end of the valve rod; the external threads on the valve rod are matched and meshed with the internal threads on the inner peripheral wall of the connecting part at the top of the flashboard, the flashboard is driven to move up and down between the first seat plate and the second seat plate along the direction parallel to the axial direction of the valve rod through the rotation of the valve rod, and then the through hole of the flashboard is aligned with or staggered with the flow passage;
fifthly, casting or forging the valve cover, wherein the valve cover is connected with the valve body through a bolt; the top of the valve cover is provided with a bulge; the center of the bulge is provided with a central hole; the outer peripheral wall of the bulge is connected with the nut through threads; the top end of the valve rod penetrates out of the central hole of the bulge part and penetrates through the top surface of the nut; the part of the top end of the valve rod, which is positioned outside the top surface of the nut, is connected with the hand wheel through a pin or a key, and the valve rod is driven to rotate by rotating the hand wheel; and a gap between the valve rod and the inner peripheral wall of the boss is filled with filler.
The diameters of the first base plate hole and the second base plate hole are equal to the diameter of the flow channel.
The diameters of the first through hole and the second through hole are equal to the diameter of the flow passage.
The diameter of the flashboard through hole is equal to that of the runner.
A stroke control flange is also processed on the valve rod; the stroke control flange is arranged above the external thread on the peripheral wall at one end of the valve rod.
The first seat plate and the second seat plate are connected with the valve body through welding.
An inclined lubricating oil channel is arranged in the valve cover.
The top of the bulge part is provided with a packing gland; a gland center hole is formed in the center of the packing gland, and the valve rod penetrates out of the gland center hole; the packing is retained within the packing cavity by a packing gland.
And a bearing is arranged in a space between the top of the packing gland and the nut, and the bearing is sleeved on the valve rod.
A horizontal lubricating oil passageway is formed in the side wall of the nut, one end of the lubricating oil passageway is communicated with the bearing, the other end of the lubricating oil passageway penetrates out of the outer peripheral wall of the nut and forms a lubricating hole in the outer peripheral wall of the nut, and the lubricating hole is closed by a plug.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that: the forming process of the large-diameter integrally forged gate valve adopts the integral forging technology to manufacture the valve body, and all special processing operations are carried out on inserted parts. The seat plate is completely supported by the valve body sleeve under the thrust load of pressure, so that the valve body still can keep necessary flatness under the combined action of temperature change and the friction resistance of the flashboard, and the seat plate sealing element forms tight sealing between the seat plate and the valve body sleeve and between the flashboard and the seat plate, thereby improving the sealing performance of the gate valve.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a front cross-sectional view of a large diameter integrally forged gate valve according to the present invention.
FIG. 2 isbase:Sub>A sectional view taken along the line A-A of the large diameter integrally forged gate valve shown in FIG. 1.
FIG. 3 is a sectional view in the direction B-B of the large diameter integrally forged gate valve shown in FIG. 2.
Detailed Description
The present invention is described in more detail below to facilitate an understanding of the invention.
The forming process of the large-diameter integrally forged gate valve comprises the following steps of:
firstly, a valve body 20 of the gate valve is integrally forged, and a flow passage 14 extending along the axial direction of the valve body is formed in the center of the valve body; a valve chamber 16 formed in a cylindrical shape in a direction perpendicular to the flow path; machining a first stepped annular groove 30 and a second stepped annular groove 40 at the intersection of the flow passage 14 and the valve chamber 16; the first stepped annular groove 30 includes a first large diameter annular portion 30a and a first small diameter annular portion 30b; the second stepped annular groove 40 includes a second large diameter annular portion 40a and a second small diameter annular portion 40b; machining a first seat plate 50 and a second seat plate 52 spaced apart between the first large diameter ring 30a and the second large diameter ring 40 a; a first seat plate 50 and a second seat plate 52 are vertically disposed in the cylindrical valve chamber 16; a first seat plate hole 56 is arranged at the central position of the first seat plate 50; a second seat plate hole 66 is formed in the center of the second seat plate 52; the first and second plate openings 56, 66 are aligned with the flow passage 14;
second, the first valve body sleeve 32 and the second valve body sleeve 42 are machined; inserting the first valve body sleeve 32 and the second valve body sleeve 42 into the valve chamber 16; a first through hole 34 is formed in the center of the first valve body sleeve 32, a second through hole 44 is formed in the center of the second valve body sleeve 42, and the first through hole 34 and the second through hole 44 are aligned with the flow passage 14; said first valve body sleeve 32 comprises a first large diameter sleeve portion 32a and a first small diameter sleeve portion 32b, and said second valve body sleeve 42 comprises a second large diameter sleeve portion 42a and a second small diameter sleeve portion 42b; said first large diameter sleeve portion 32a being in mating abutment with the first large diameter annular portion 30 a; the first small diameter sleeve portion 32b is in mating abutment with the first small diameter ring portion 30b; said second large diameter sleeve portion 42a matingly abutting second large diameter annular portion 40 a; said second small diameter sleeve portion 42b is in mating abutment with the second small diameter annular portion 40b; a first seat plate sealing ring groove 60 is arranged on a first seat plate end surface 50a of the first seat plate 50 facing the first valve body sleeve 32; a first seat plate sealing ring is arranged in the first seat plate sealing ring groove; the first seat plate seal ring is sandwiched between the first valve body sleeve 32 and the first seat plate 50; a first sleeve sealing ring groove 38 is arranged on the end surface of the first small-diameter sleeve part 32b facing the first small-diameter annular part 30b; a first sleeve sealing ring is arranged in the first sleeve sealing ring groove; the first sleeve seal ring is sandwiched between the first valve body sleeve 32 and the first small diameter annular portion 30b; a second seat plate sealing ring groove 70 is arranged on a second seat plate end surface 52a of the second seat plate 52 facing the second valve body sleeve 42; a second seat plate sealing ring is arranged in the second seat plate sealing ring groove; the second seat plate sealing ring is sandwiched between the second valve body sleeve 42 and the second seat plate 52; a second sleeve sealing ring groove 48 is formed on the end surface of the second small-diameter sleeve part 42b facing the second small-diameter ring-shaped part 40b; a second sleeve sealing ring is arranged in the second sleeve sealing ring groove; the second sleeve sealing ring is sandwiched between the second body sleeve 42 and the second small diameter annular portion 40b;
thirdly, processing a rectangular parallelepiped gate 26, wherein the interior of the gate is a hollow structure, and a gate through hole 28 penetrating through the gate along a direction perpendicular to the side wall is formed in the side wall of the gate; the top of the gate plate is provided with a cylindrical connecting part 76, and the inner peripheral wall is provided with internal threads;
fourthly, processing a valve rod 78, wherein an external thread is processed on the peripheral wall of one end of the valve rod; the external thread on the valve rod is matched and meshed with the internal thread on the inner peripheral wall of the connecting part 76 at the top of the gate plate, and the gate plate 26 is driven to move up and down between the first seat plate 50 and the second seat plate 52 along the direction parallel to the axial direction of the valve rod through the rotation of the valve rod, so that the gate plate through hole 28 is aligned with or staggered with the flow passage 14;
fifth, cast or forged valve cover 82, which is attached to valve body 20 by bolts 92; the top of the valve cover is provided with a bulge 86; the center of the bulge is provided with a central hole; the outer peripheral wall of the boss is connected with the nut 98 through threads; the top end of the valve stem passes out of the boss central bore and through the top surface of the nut 98; the part of the top end of the valve rod, which is positioned outside the top surface of the nut, is connected with a hand wheel 108 through a pin or a key, and the valve rod is driven to rotate by rotating the hand wheel 108; the space between the stem and the inner peripheral wall of the boss 86 is filled with a filler.
The diameters of the first and second plate openings 56, 66 are equal to the diameter of the flow passage 14.
The first and second through holes 34 and 44 have a diameter equal to the diameter of the flow channel 14.
The diameter of the gate plate through hole 28 is equal to the diameter of the flow passage 14.
A stroke control flange 110 is also machined on the valve rod 78; the stroke control flange is arranged above the external thread on the peripheral wall at one end of the valve rod.
The first seat plate 50 and the second seat plate 52 are connected to the valve body 20 by welding.
The interior of the valve cover is provided with an inclined lubrication oil passage 114.
The top of the boss 86 is provided with a packing gland 96; a gland center hole is formed in the center of the packing gland, and the valve rod penetrates out of the gland center hole; the packing 90 is retained within the packing cavity 88 by a packing gland 96.
A bearing 118 is disposed in the space between the top of the gland and the nut 98 and is fitted over the valve stem 78.
A horizontal lubricating oil passageway is formed in the side wall of the nut 98, one end of the lubricating oil passageway is communicated with the bearing, the other end of the lubricating oil passageway penetrates out of the outer peripheral wall of the nut 98, a lubricating hole is formed in the outer peripheral wall of the nut 98, and the lubricating hole is closed by a plug 116. When the bearing needs to be replenished with lubricating oil, the plug 116 is opened, and the lubricating oil is injected from the lubricating oil passageway.
The foregoing describes preferred embodiments of the present invention, but is not intended to limit the invention thereto. Those skilled in the art may make modifications and variations to the embodiments disclosed herein without departing from the scope and spirit of the invention.
Claims (1)
1. A large-diameter integrally forged gate valve is characterized by comprising a valve body, a first valve body sleeve, a second valve body sleeve, a rectangular gate plate and a valve cover, wherein,
the valve body is formed by integral forging, and a flow passage extending along the axial direction of the valve body is formed in the center of the valve body; a cylindrical valve chamber is processed in the direction vertical to the flow passage; a first stepped annular groove and a second stepped annular groove are machined at the intersection position of the flow passage and the valve chamber; the first step type annular groove comprises a first large-diameter annular part and a first small-diameter annular part; the second step type annular groove comprises a second large-diameter annular part and a second small-diameter annular part; a first base plate and a second base plate which are spaced apart are machined between the first large-diameter ring part and the second large-diameter ring part; a first seat plate and a second seat plate are vertically disposed in the cylindrical valve chamber; a first seat plate hole is formed in the center of the first seat plate; a second seat plate hole is formed in the center of the second seat plate; the first seat plate hole and the second seat plate hole are aligned with the flow passage;
the first valve body sleeve and the second valve body sleeve are inserted into the valve chamber; a first through hole is formed in the center of the first valve body sleeve, a second through hole is formed in the center of the second valve body sleeve, and the first through hole and the second through hole are aligned with the flow passage; said first valve body sleeve including a first large diameter sleeve portion and a first small diameter sleeve portion and said second valve body sleeve including a second large diameter sleeve portion and a second small diameter sleeve portion; the first large-diameter sleeve part is matched and abutted with the first large-diameter annular part; the first small-diameter sleeve part is matched and abutted with the first small-diameter annular part; the second large-diameter sleeve part is matched and abutted with the second large-diameter annular part; the second small-diameter sleeve part is matched and abutted with the second small-diameter annular part; a first seat plate sealing ring groove is formed in the end face, facing the first valve body sleeve, of the first seat plate; a first seat plate sealing ring is arranged in the first seat plate sealing ring groove; the first seat plate sealing ring is clamped between the first valve body sleeve and the first seat plate; a first sleeve sealing ring groove is formed in the end face, facing the first small-diameter annular part, of the first small-diameter sleeve part; a first sleeve sealing ring is arranged in the first sleeve sealing ring groove; the first sleeve sealing ring is clamped between the first valve body sleeve and the first small-diameter annular part; a second seat plate sealing ring groove is formed in the end face, facing the second valve body sleeve, of the second seat plate; a second seat plate sealing ring is arranged in the second seat plate sealing ring groove; the second seat plate sealing ring is clamped between the second valve body sleeve and the second seat plate; a second sleeve sealing ring groove is formed in the end face, facing the second small-diameter annular part, of the second small-diameter sleeve part;
a second sleeve sealing ring is arranged in the second sleeve sealing ring groove; the second sleeve sealing ring is clamped between the second valve body sleeve and the second small-diameter annular part;
the interior of the gate plate is of a hollow structure, and a gate plate through hole penetrating through the gate plate along the direction perpendicular to the side wall is formed in the side wall of the gate plate; the top of the flashboard is provided with a cylindrical connecting part, and the inner peripheral wall of the connecting part is provided with an internal thread;
the valve cover is formed by casting or forging and is connected with the valve body through a bolt; the top of the valve cover is provided with a bulge; the center of the bulge part is provided with a central hole; the outer peripheral wall of the bulge part is connected with the nut through threads; the top end of the valve rod penetrates out of the central hole of the bulge part and penetrates through the top surface of the nut; the part of the top end of the valve rod, which is positioned outside the top surface of the nut, is connected with the hand wheel through a pin or a key, and the valve rod is driven to rotate by rotating the hand wheel; the gap between the valve rod and the inner peripheral wall of the bulge is filled with filler;
an inclined lubricating oil channel is arranged inside the valve cover;
the top of the bulge part is provided with a packing gland; a gland central hole is formed in the center of the packing gland, and the valve rod penetrates out of the gland central hole; the packing is held in the packing cavity by a packing gland;
a bearing is arranged in a space between the top of the packing gland and the nut, and the bearing is sleeved on the valve rod; a horizontal lubricating oil passageway is formed in the side wall of the nut, one end of the lubricating oil passageway is communicated with the bearing, the other end of the lubricating oil passageway penetrates out of the outer peripheral wall of the nut and forms a lubricating hole in the outer peripheral wall of the nut, and the lubricating hole is closed by a plug;
an external thread is machined on the outer peripheral wall of one end of the valve rod; the external threads on the valve rod are matched and meshed with the internal threads on the inner peripheral wall of the connecting part at the top of the flashboard, the flashboard is driven to move up and down between the first seat plate and the second seat plate along the direction parallel to the axial direction of the valve rod through the rotation of the valve rod, and then the through hole of the flashboard is aligned with or staggered with the flow passage;
a stroke control flange is also processed on the valve rod; the stroke control flange is arranged above the external thread on the peripheral wall at one end of the valve rod; the first seat plate and the second seat plate are connected with the valve body through welding;
the diameters of the first base plate hole and the second base plate hole are equal to the diameter of the flow channel;
the diameters of the first through hole and the second through hole are equal to the diameter of the flow channel;
the diameter of the flashboard through hole is equal to that of the runner;
the seat plate is completely supported by the valve body sleeve under the thrust load of pressure, so that the valve body still can keep necessary flatness under the combined action of temperature change and the frictional resistance of the gate plate, and the seat plate sealing piece forms tight sealing between the seat plate and the valve body sleeve and between the gate plate and the seat plate, thereby improving the sealing performance of the gate valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426433.9A CN111570692B (en) | 2020-05-19 | 2020-05-19 | Forming process of large-diameter integrally forged gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426433.9A CN111570692B (en) | 2020-05-19 | 2020-05-19 | Forming process of large-diameter integrally forged gate valve |
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| Publication Number | Publication Date |
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| CN111570692A CN111570692A (en) | 2020-08-25 |
| CN111570692B true CN111570692B (en) | 2023-01-24 |
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| CN200958618Y (en) * | 2006-09-22 | 2007-10-10 | 江苏金石油气井口科技有限公司 | Flat valve |
| CN201561139U (en) * | 2009-11-06 | 2010-08-25 | 上海神开石油化工装备股份有限公司 | High-pressure heavy-caliber flat-plate gate valve |
| WO2013158029A1 (en) * | 2012-04-18 | 2013-10-24 | Aker Solutions Pte Ltd | A gate for a gate valve |
| CN104019274A (en) * | 2014-07-02 | 2014-09-03 | 普胜特能源（广汉）服务有限公司 | Automatic-locking-type hydraulic drive flat plate valve |
| CN104801929A (en) * | 2015-04-08 | 2015-07-29 | 苏州市鑫渭阀门有限公司 | Valve cap manufacturing technology |
| CN206845957U (en) * | 2017-06-21 | 2018-01-05 | 成都乘风阀门有限责任公司 | One kind forging gate valve |
| CN207687383U (en) * | 2017-12-29 | 2018-08-03 | 浙江天特阀门有限公司 | Upper deflector hole flap type |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111570692A (en) | 2020-08-25 |
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