CN112045374B - Manufacturing process of high-strength valve body and product thereof - Google Patents
Manufacturing process of high-strength valve body and product thereof Download PDFInfo
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- CN112045374B CN112045374B CN202010985727.5A CN202010985727A CN112045374B CN 112045374 B CN112045374 B CN 112045374B CN 202010985727 A CN202010985727 A CN 202010985727A CN 112045374 B CN112045374 B CN 112045374B
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- seat
- valve body
- valve
- sealing pad
- valve core
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/10—Welded housings
- F16K27/107—Welded housings for taps or cocks
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
Abstract
The invention relates to a manufacturing process of a high-strength valve body, which is characterized in that a valve seat, a valve core seat, a fixed sealing pad seat and a movable sealing pad seat are respectively prepared, and the valve body is manufactured by adopting the processes of cold stamping, deep drawing, finish machining, saw cutting and the like.
Description
Technical Field
The invention relates to the field of valves, in particular to a manufacturing process of a high-strength valve body and the valve body manufactured by the process.
Background
The valve is a pipeline accessory for opening and closing the pipeline, controlling the flow direction, regulating and controlling parameters (temperature, pressure and flow) of a conveying medium, and the valve isFluid transportA control part in the system, having a cut-off,RegulatingFlow guiding, reverse flow preventing, pressure stabilizing, flow dividing or overflow pressure relief and other functions, and is used as valve for fluid control systemSimpleFrom stop valves to valves used in extremely complex autonomous systems, of considerable variety and size, which can be used forControlling airWater, steam, variousCorrosiveness ofA medium,Slurry compositionFlow of various types of fluids, oil, liquid metal and radioactive media.
The valve consists of a valve body, a valve core, a sealing ring and a valve core control assembly, wherein the most important valve body is mainly manufactured by casting, but the cast valve body has the following defects:
1. the valve body manufactured by casting has lower low-temperature resistance, and is easy to show frost crack of the valve body when used in special fluids, so that the valve is damaged, and great potential safety hazard is brought.
2. The valve body made by casting has low strength, and is easy to air-dry naturally after being used for a period of time, so that the service life is too low.
3. The production process of the cast valve body can generate solid waste and dangerous air pollutants which seriously pollute the environment, the air pollution source is dispersed during casting, the concentration is lower, the quantity is large, more than 40 types of casting waste gas are detected in 188 total air pollutants listed by the United states environmental protection agency, the environment and the human health are greatly harmed, the health of workers is seriously influenced, and the environment-friendly policy which is continuously pushed by China is not met.
4. The valve body is cast by hot processing, a large amount of heat energy is consumed, long-time cooling is needed after casting, in the casting process, oxide skin is easy to appear on the surface of the valve body, and the oxide skin on the surface is removed by adopting the modes of shot blasting, sand blasting, acid pickling and the like, but the method for removing the oxide skin has obvious defects, if the shot blasting and the sand blasting are high in energy consumption, energy is not saved, the cost is high, the acid pickling process easily causes serious pollution to the environment, if the environment-friendly project is adopted, the cost of a manufacturing enterprise is very high, the production cost and the time cost of the valve are greatly increased, and the production efficiency is too low.
Disclosure of Invention
The technical problem to be solved by the present invention is to solve the above-mentioned deficiencies of the prior art,
the valve body manufactured by the process has high strength, solves the problems of low-temperature easy frost cracking and normal-temperature easy air drying of the cast valve body, prolongs the service life, and greatly increases enterprise competitiveness compared with the original process with low cost and high efficiency.
In order to achieve the purpose, the invention provides the following technical scheme: a manufacturing process of a high-strength valve body comprises the following steps:
s1: preparing a semi-finished valve seat, cutting the steel pipe into a plurality of small sections according to the size of the valve body, and punching the surface of the cut small sections of the steel pipe to prepare the semi-finished valve seat;
preparing a valve core seat, cutting the steel pipe into a plurality of small sections according to the size of the valve core, and manufacturing the cut small sections of the steel pipe into the valve core seat through a cold stamping deep drawing or forging process;
preparing a fixed sealing pad seat, and punching a steel plate to form a plurality of fixed sealing pad seats with central holes according to the inner diameter of the valve body;
preparing a movable sealing pad seat, blanking a steel plate according to the inner diameter of a valve body to punch a plurality of movable sealing pad seats with central holes, wherein the central hole ends are special-shaped holes;
s2: welding the punching end of the semi-finished valve seat produced in the step S1 with the valve core seat to manufacture a valve seat;
s3: fixing the fixed sealing pad seat produced in the step S1 at one end, close to the valve core seat, in the valve seat made in the step S2 through a welding process according to the size of the valve core to manufacture a semi-finished valve body;
s4: processing internal threads for connecting pipelines into the interior of the two ends of the semi-finished valve body in the step S3 through a finish machining process, wherein the length of the internal threads does not exceed the length from the fixed sealing gasket seat to the end part of the semi-finished valve body;
s5: machining the outer diameter of the movable sealing pad seat produced in the step S1 into an external thread matched with the internal thread in the step S4 through a finish machining process;
s6: and screwing the movable sealing gasket seat obtained in the step S5 on one end, which is not welded and fixed with the sealing gasket seat, of the semi-finished valve body obtained in the step S4 through threads, so that the valve body is assembled.
By adopting the technical scheme, the original process for manufacturing the valve body is changed from casting to cold stamping drawing and laser welding, in particular to a process for manufacturing the valve body, which comprises the steps of splitting the valve body into four small parts, namely a valve seat, a valve core seat, a movable sealing cushion seat and a fixed sealing cushion seat, wherein the valve seat can be communicated with the valve core seat by punching a hole on a steel pipe so as to place a valve core, internal threads are formed at two ends of the valve seat for subsequent pipeline installation and connection, the valve core seat is manufactured into the valve core seat with one big end and one small end through the cold stamping drawing process or the forging process and then is connected with the valve seat through the welding process, the fixed sealing cushion seat is arranged at one end of the valve core seat for placing a subsequent sealing gasket, the fixed sealing cushion seat is abutted against the valve core through the sealing gasket so as to ensure the sealing performance, the movable sealing cushion seat is arranged at the other end of the valve body close to the valve core seat through the external threads so as to place the subsequent valve core, and a hole is formed in the center of the fixed sealing cushion seat for medium to circulate, the movable sealing pad seat is provided with a polygonal hole, even if the medium can be conveniently and subsequently installed when circulating, wherein the special-shaped hole can be a square, a hexagonal or an octagonal shape, preferably a hexagonal shape, and the internal thread can not exceed the maximum installation distance of the movable sealing pad seat, so as to avoid the water flow from directly entering the valve core part through the internal thread, the specific assembly mode is that the sealing pad is firstly placed on the fixed sealing pad seat from one end of the movable sealing pad seat, then the valve core is placed, then the sealing pad is placed, finally the movable sealing pad seat is screwed into the valve core, so that the movable sealing pad seat and the fixed sealing pad seat are abutted with the valve core through the sealing pad, thereby ensuring the sealing performance of the valve, the whole process replaces casting through cold stamping, finish machining, sawing and welding processes, greatly reducing the production cost and industrial pollution, improving the product manufacturing efficiency, and the valve body formed through cold stamping, because the crystal grains are obviously refined after the die pressing deformation, a larger deformation amount is accumulated in the deformation process, and the area of equiaxial crystals appearing in the microstructure is obviously increased, the mass under the same volume is increased, and the integral strength of the valve is improved, so that the problems that the cast valve body is easy to frost crack at low temperature and is easy to air dry at normal temperature are solved, and the service life of the valve seat is prolonged.
The manufacturing process of the high-strength valve body can be further set as follows: the finish machining processes adopted for preparing the internal thread of the semi-finished valve body in the step S4 and the external thread of the movable sealing washer in the step S5 both refer to the following steps: and (4) forming a spiral thread with a continuous bulge with a specific section on the surface or the inner wall to be processed by a lathe, and enabling the semi-finished valve body and the movable sealing gasket seat to form a matched thread surface for S6 assembly.
By adopting the technical scheme, most of the finish machining in the steps S4 and S5 refers to thread machining on the semi-finished valve body and the movable sealing gasket seat, and the workpiece can be machined by cutting, turning, milling, grinding and other processes to form threads. The manufacturing process of the high-strength valve body can be further set as follows: the welding process in step S3 is a laser welding process, and the steel pipe is a stainless steel pipe.
By adopting the technical scheme, along with the development of welding technology, the Chinese laser welding technology gradually enters the world advanced level, the seamless high sealing performance of the welding seam of the valve body is realized, specifically, the laser radiation heats the surface to be processed, the surface heat is diffused to the inside through heat conduction, the workpiece is melted by controlling the laser parameters such as the width, the energy, the peak power and the repetition frequency of laser pulse, a specific molten pool is formed, the workpieces to be welded are connected, and the stainless steel pipe welding device has the advantages of high welding speed, small deformation, convenience in processing and the like, and the valve body is prevented from rusting due to the selection of the stainless steel pipe.
The manufacturing process of the high-strength valve body can be further set as follows: the step S1 of preparing the valve core seat further includes cutting one end of the valve core seat into a limiting groove for limiting the rotation angle of the valve core.
By adopting the technical scheme, the limiting groove is formed in one end of the valve core seat, so that the rotation angle of the valve core is limited, and the limiting groove is a groove hole with one end parallel to the valve seat and the other end perpendicular to the valve seat.
The manufacturing process of the high-strength valve body can be further set as follows: the polygonal hole pointed by the movable sealing pad prepared in the step S1 is a hexagonal hole.
By adopting the technical scheme, the polygonal hole formed by the movable sealing cushion seat is hexagonal, so that the movable sealing cushion seat can be conveniently screwed into the valve seat through a conventional tool for facilitating follow-up, and meanwhile, the hexagonal hole and the central hole of the fixed sealing cushion seat can be in the same specification and the flow is the closest.
The manufacturing process of the high-strength valve body can be further set as follows: further comprising S7: and finishing the surface of the valve body obtained in the step S6 with a mounting mark, wherein the mounting mark arrow points to one end of the movable sealing gasket seat.
By adopting the technical scheme, the installation mark is arranged, so that an installer can connect the water inlet end with one end of the fixed sealing pad seat when installing the valve made of the valve body, water flow can only enter the valve core from the center hole of the fixed sealing pad seat after laser welding, and the sealing performance of the valve body is further improved.
A high strength valve body made by above-mentioned technology, its characterized in that: the valve seat comprises a valve seat and a valve core seat which is arranged on the valve seat and communicated with the valve seat, wherein inner threads for pipeline connection are arranged at two ends of the valve seat, a fixed sealing cushion seat fixedly connected with the valve seat is arranged at one end, close to the valve core seat, of the inner wall of the valve seat, a movable sealing cushion seat movably connected with the valve seat is arranged at the other end of the inner wall of the valve seat, an outer thread matched with the inner threads is arranged outside the movable sealing cushion seat, a through hole communicated with the inner diameter of the valve seat is arranged in the middle of the fixed sealing cushion seat, and a polygonal hole with the same inner diameter as the through hole is arranged in the middle of the movable sealing cushion seat.
By adopting the technical scheme, the valve body is provided with the fixed valve core through the valve core seat, the valve core is accommodated through the valve seat so as to control the valve switch, the valve body is connected with a pipeline by arranging internal threads at two ends of the valve body, one end of the valve body is provided with the fixed sealing cushion seat welded by laser and used for placing the sealing gasket, so that the sealing performance of the end is ensured, the other end of the valve body is provided with the movable sealing cushion seat movably connected with the valve body, so that the subsequent valve core is arranged in the valve body from the end, and through the arrangement of the polygonal hole, an assembler can conveniently connect the movable sealing cushion seat in a screwing mode through a tool and place the sealing gasket, so that the sealing performance of the end is ensured.
The high-strength valve body can be further provided with: and a limiting groove for limiting the rotation angle of the valve core is arranged on the valve core seat, one end of the limiting groove is parallel to the valve seat, and the other end of the limiting groove is perpendicular to the valve seat.
By adopting the technical scheme, the rotation angle of the valve core is controlled by arranging the limiting groove, wherein one end of the limiting groove is parallel to the valve seat, and the other end of the limiting groove is perpendicular to the valve seat, so that a user can visually judge the opening and closing state of the valve from the rotation angle of the valve core.
The high-strength valve body can be further configured as follows: the polygonal holes are hexagonal holes.
By adopting the technical scheme, the polygonal hole formed by the movable sealing cushion seat is hexagonal, so that the movable sealing cushion seat can be conveniently screwed into the valve seat through a conventional tool for facilitating follow-up, and meanwhile, the hexagonal hole and the central hole of the fixed sealing cushion seat can be in the same specification and the flow is the closest.
The manufacturing process of the high-strength valve body can be further set as follows: and an installation mark is arranged outside the valve seat, and an arrow of the installation mark faces to one end of the movable sealing cushion seat.
By adopting the technical scheme, the installation mark is arranged, so that an installer can connect the water inlet end with one end of the fixed sealing pad seat when installing the valve made of the valve body, water flow can only enter the valve core from the center hole of the fixed sealing pad seat after laser welding, and the sealing performance of the valve body is further improved.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is an exploded view of fig. 1.
Fig. 3 is a cross-sectional view of an embodiment of the present invention.
Fig. 4 is a cross-sectional view of the invention assembled into a valve.
Detailed Description
A manufacturing process of a high-strength valve body comprises the following steps:
s1: preparing a semi-finished valve seat, cutting the stainless steel pipe or the hexagonal pipe into a plurality of small sections according to the size of the valve body, and punching the surfaces of the small sections of the stainless steel pipe or the hexagonal pipe to prepare the semi-finished valve seat;
preparing a valve core seat, cutting a stainless steel pipe or a hexagonal pipe into a plurality of small sections according to the size of the valve core, manufacturing the valve core seat by cold stamping deep drawing or forging technology of the small sections of the stainless steel pipe or the hexagonal pipe, and cutting one end of the valve core seat into a limiting groove for limiting the rotation angle of the valve core;
preparing a fixed sealing pad seat, and putting a steel plate on a punching machine to punch a plurality of fixed sealing pad seats with circular central holes according to the inner diameter of the valve body;
preparing a movable sealing pad seat, namely putting a steel plate on a punching machine according to the inner diameter of a valve body to punch a plurality of movable sealing pad seats with central holes, wherein the central hole ends are hexagonal holes convenient for driving the movable sealing pad seats to rotate;
s2: welding the punching end of the semi-finished valve seat produced in the step S1 with the valve core seat to manufacture a valve seat;
s3: fixing the fixed sealing pad seat produced in the step S1 at one end, close to the valve core seat, in the valve seat made in the step S2 through a laser welding process according to the size of the valve core to manufacture a semi-finished valve body;
s4: making two ends of the semi-finished valve body in the step S3 into spiral internal threads which have specific sections and are continuously protruded and are used for connecting a pipeline on the inner wall of the valve body through a lathe, wherein the length of the internal threads does not exceed the length from the fixed sealing gasket seat to the end part of the semi-finished valve body;
s5: the outer diameter of the movable sealing pad seat produced in the step S1 is made into a spiral external thread which is matched with the internal thread in the step S4 and provided with a continuous bulge with a specific section on the outer diameter of the movable sealing pad seat through a lathe;
s6: and screwing the movable sealing gasket seat obtained in the step S5 on one end, which is not welded and fixed with the sealing gasket seat, of the semi-finished valve body obtained in the step S4 through threads, so that the valve body is assembled.
S7: and finishing the surface of the valve body obtained in the step S6 with a mounting mark, wherein the mounting mark arrow points to one end of the movable sealing gasket seat.
As shown in fig. 1-3, a high strength valve head comprises a valve seat 1 and a valve core seat 2 disposed on the valve seat 1 and communicated with the valve seat 1, wherein two ends of the valve seat 1 are both provided with internal threads 11 for pipeline connection, one end of the inner wall of the valve seat 1 near the valve core seat 2 is provided with a fixed sealing pad seat 3 fixedly connected with the valve seat 1, the other end is provided with a movable sealing pad seat 4 movably connected with the valve seat 1, the outer part of the movable sealing pad seat 4 is provided with external threads 41 adapted to the internal threads 11, the middle part of the fixed sealing pad seat 3 is provided with a through hole 31 communicated with the inner diameter of the valve seat 1, the middle part of the movable sealing pad seat 4 is provided with a polygonal hole 42 having the same inner diameter as the through hole 31, the valve core seat 2 is provided with a limiting groove 21 for limiting the rotation angle of the valve core a, one end of the limiting groove 21 is parallel to the valve seat 1, and the other end is perpendicular to the valve seat 1, the polygonal hole 42 is a hexagonal hole, an installation mark 5 is arranged outside the valve seat 1, and an arrow of the installation mark 5 faces one end of the movable sealing gasket seat 4.
As shown in fig. 4, when the valve body of the present invention is used for assembling a valve, the sealing gasket B is first placed into the valve seat 1 from one end of the movable sealing gasket seat 4 to abut against the fixed sealing gasket seat 3, then the valve core a is also placed into the valve seat 1 from the end to abut against the sealing gasket B, then the position of the valve core a is adjusted to enable the valve core rod C to penetrate through the valve core seat 2 and then to be connected with the valve core a, so that the valve core rod C can rotate the valve core a, then the sealing gasket B is placed into the valve seat 1 from one end of the movable sealing gasket seat 4 to abut against the valve core a, and then the sealing gasket B is inserted into the polygonal hole 42 through a tool to drive the movable sealing gasket seat to be screwed along the internal thread 11 until abutting against the sealing gasket B, thereby completing the valve assembly.
When the valve is used on a pipeline, the internal threads 11 at the two ends of the valve seat 1 are connected with the pipeline, one end of the valve seat 1 corresponding to the fixed sealing gasket seat 3 is connected with the pipeline water inlet pipe, one end of the valve seat corresponding to the movable sealing gasket seat 4 is connected with the pipeline water outlet pipe, and when the valve core rod C drives the valve core A to close the valve, water flow can not pass through the fixed sealing gasket seat 3 of laser welding, so that the maximization of the sealing effect is realized.
Claims (9)
1. A manufacturing process of a high-strength valve body comprises the following steps:
s1: preparing a semi-finished valve seat, cutting the steel pipe into a plurality of small sections according to the size of the valve body, and punching the surface of the cut small sections of the steel pipe to prepare the semi-finished valve seat;
preparing a valve core seat, cutting the steel pipe into a plurality of small sections according to the size of the valve core, and manufacturing the cut small sections of the steel pipe into the valve core seat through a cold stamping deep drawing or forging process;
preparing a fixed sealing pad seat, and punching a steel plate to form a plurality of fixed sealing pad seats with central holes according to the inner diameter of the valve body;
preparing a movable sealing pad seat, blanking a steel plate according to the inner diameter of a valve body to punch a plurality of movable sealing pad seats with central holes, wherein the central hole ends are special-shaped holes;
s2: welding the punching end of the semi-finished valve seat produced in the step S1 with the valve core seat to manufacture a valve seat;
s3: fixing the fixed sealing pad seat produced in the step S1 at one end, close to the valve core seat, in the valve seat made in the step S2 through a welding process according to the size of the valve core to manufacture a semi-finished valve body;
s4: processing internal threads for connecting pipelines into the interior of the two ends of the semi-finished valve body in the step S3 through a finish machining process, wherein the length of the internal threads does not exceed the length from the fixed sealing gasket seat to the end part of the semi-finished valve body;
s5: machining the outer diameter of the movable sealing pad seat produced in the step S1 into an external thread matched with the internal thread in the step S4 through a finish machining process;
s6: screwing the movable sealing pad seat obtained in the step S5 to one end, which is not welded and fixed with the sealing pad seat, of the semi-finished valve body obtained in the step S4 through threads, so that the valve body is assembled;
the finish machining processes adopted for preparing the internal thread of the semi-finished valve body in the step S4 and the external thread of the movable sealing washer in the step S5 both refer to the following steps: and (4) forming a spiral thread with a continuous bulge with a specific section on the surface or the inner wall to be processed by a lathe, and enabling the semi-finished valve body and the movable sealing gasket seat to form a matched thread surface for S6 assembly.
2. The manufacturing process of a high-strength valve body according to claim 1, wherein: the welding process in step S3 is a laser welding process, and the steel pipe is a stainless steel pipe.
3. The manufacturing process of a high-strength valve body according to claim 1, wherein: the step S1 of preparing the valve core seat further includes cutting one end of the valve core seat into a limiting groove for limiting the rotation angle of the valve core.
4. The manufacturing process of a high-strength valve body according to claim 1, wherein: the special-shaped hole in the step S1 for preparing the movable gasket seat is a hexagonal hole.
5. The manufacturing process of a high-strength valve body according to claim 1, wherein: further comprising S7: and finishing the surface of the valve body obtained in the step S6 with a mounting mark, wherein the mounting mark arrow points to one end of the movable sealing gasket seat.
6. A high-strength valve body manufactured according to a manufacturing process of the high-strength valve body according to any one of claims 1 to 5, characterized in that: including disk seat and the valve core seat that sets up on the disk seat and switch on mutually with the disk seat, the internal thread that supplies the pipe connection is all seted up at the disk seat both ends, the one end that the disk seat inner wall is close to the valve core seat is equipped with the fixed sealing pad seat with disk seat fixed connection, and the other end is equipped with the movable sealing pad seat with disk seat swing joint, the activity sealing pad seat outside is equipped with the external screw thread with internal thread looks adaptation, the through-hole that switches on mutually with the disk seat internal diameter is seted up at fixed sealing pad seat middle part, activity sealing pad seat middle part seted up with the heterotypic hole that the through-hole internal diameter is unanimous.
7. A high strength valve body according to claim 6, wherein: and a limiting groove for limiting the rotation angle of the valve core is arranged on the valve core seat, one end of the limiting groove is parallel to the valve seat, and the other end of the limiting groove is perpendicular to the valve seat.
8. A high strength valve body according to claim 6, wherein: the special-shaped holes are hexagonal holes.
9. A high strength valve body according to claim 6, wherein: and an installation mark is arranged outside the valve seat, and an arrow of the installation mark faces to one end of the movable sealing cushion seat.
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| CN202010985727.5A CN112045374B (en) | 2020-09-18 | 2020-09-18 | Manufacturing process of high-strength valve body and product thereof |
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