CN107883003B - Electric valve for regulating fluid flow - Google Patents
Electric valve for regulating fluid flow Download PDFInfo
- Publication number
- CN107883003B CN107883003B CN201711339785.5A CN201711339785A CN107883003B CN 107883003 B CN107883003 B CN 107883003B CN 201711339785 A CN201711339785 A CN 201711339785A CN 107883003 B CN107883003 B CN 107883003B
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- Prior art keywords
- valve
- internal thread
- thread part
- hole
- connecting piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
An electric valve for regulating the flow of fluid, an internal thread part is arranged in the inner cavity of a valve body outer cover, the internal thread part is provided with a round hole matched with the external thread of an external thread part and provided with an internal thread, the external thread part is movably arranged in the round hole of the internal thread part through threaded fit, the top of the external thread part penetrates out of the round hole and is connected with a rotor arranged in the inner cavity of the valve body outer cover, the external thread part is connected with a valve core, and the valve core is close to or far away from a valve port on a valve core seat; the top of the connecting piece is provided with a through hole communicated with the cup cavity, the internal thread part is injection molded through an injection mold, the plane of the top of the connecting piece and the internal thread part are integrally fixed through injection molding of the injection mold, and the peripheral part of the connecting piece is abutted against the inner cavity wall of the valve shell. The positioning of the internal thread part adopts the positioning of the periphery of the cup body of the inverted cup shape of the connecting sheet, thereby improving the positioning precision of the internal thread part, ensuring that the connecting sheet and the valve shell are both made of metal, and ensuring the coaxiality of press mounting is easier.
Description
Technical Field
The invention belongs to the technical field of valve bodies, and particularly relates to an electric valve for regulating fluid flow.
Background
CN204004479U discloses an electric valve for regulating fluid flow, a guide sleeve is sleeved on a valve core seat, because the miniaturization problem of the flow control valve is considered, the sleeved height is not too high, the positioning accuracy is not too high, and the positioning accuracy of the guide sleeve to the valve core is difficult to meet the design requirement. Meanwhile, the internal thread part is positioned by the guide sleeve, and the positioning precision of the internal thread part is difficult to meet the design requirement because the positioning precision of the guide sleeve is low.
Disclosure of Invention
In view of the foregoing background, the present invention is directed to an electrically actuated valve for regulating fluid flow that is structurally reliable.
For this purpose, the invention adopts the following technical scheme: the electric valve for regulating the fluid flow comprises a valve body outer cover, a valve shell, an internal thread part, an external thread part and a valve core, wherein the valve body outer cover is fixedly arranged at the top of the valve shell, an inner cavity of the valve body outer cover and an inner cavity of the valve shell are communicated with each other, a lateral opening for installing a transverse connecting pipe is arranged at the side part of the valve shell, a through hole for installing a valve core seat is arranged at the bottom of the valve shell, the internal thread part is arranged in the inner cavity of the valve body outer cover, a round hole with internal threads matched with the external thread of the external thread part is arranged in the round hole of the internal thread part in a threaded mode, the top of the external thread part penetrates out of the round hole and is connected with a rotor arranged in the inner cavity of the valve body outer cover, the bottom of the external thread part is connected with the valve core, and the valve core is close to or far away from a valve port on the valve core seat; the method is characterized in that: the valve is characterized by further comprising a connecting piece which is formed by stamping and is in an inverted cup shape, a through hole which is communicated with the cup cavity is formed in the top of the connecting piece, the internal thread part is formed by injection molding of an injection mold, the top plane of the connecting piece and the internal thread part are integrally fixed by injection molding of the injection mold, and the outer periphery of the connecting piece is attached to the inner cavity wall of the valve shell and fixed by laser welding.
The invention also comprises the following technical characteristics as supplement and improvement of the technical scheme.
The through hole formed in the top of the connecting piece is a polygonal hole, so that plastic combination of the connecting piece and the internal thread part is more reliable, and relative rotation between the internal thread part and the connecting piece is prevented; the outer edge of the top of the connecting sheet is provided with a plurality of small holes.
Two small holes are formed in the same side of the outer periphery of the internal thread part above the connecting sheet, wherein one small hole is a through hole with the center line of the through hole intersecting with the center line of the internal thread part, and the other small hole is an eccentric blind hole; an elastic rail is sleeved outside the outer periphery of the internal thread part, and a positioning transverse part is arranged at the bottom of the elastic rail and is inserted into the eccentric blind hole.
The elastic rail is also provided with a lower stop part and a connecting transverse part, the spiral part of the elastic rail is connected with the lower stop part by the connecting transverse part, the lower stop part is connected with the positioning transverse part, the lower stop part is parallel to the central axis of the internal thread part, and the positioning transverse part is vertical to the lower stop part.
The internal thread part is provided with four step parts with sequentially increased outer diameters from top to bottom, and a first step part, a second step part, a third step part and a fourth step part are sequentially arranged from top to bottom, wherein the spiral part of the elastic track is matched and sleeved on the periphery of the first step part, and the spiral part and the periphery of the first step part form a spiral track; the third step part is provided with a plane inscribed with the circumferential surface of the third step part, the inscribed planes are arranged in pairs, and the inscribed planes are arranged as follows: the mold core needs to be rotationally demolded, and the internal thread part can be prevented from rotating due to the existence of the inscribed plane; the inscribed plane also reserves the position for the bleeder vent of connection piece, fourth step portion by connection piece periphery portion form.
The second step part is provided with a plane part which is circumscribed with the circumferential surface of the second step part, and the eccentric blind hole is arranged on the plane part
The connecting piece is formed by stamping a metal plate, an outer circle of the connecting piece is machined by adopting an inner expanding chuck to clamp the inner diameter of the cup body of the connecting piece, the dimensional accuracy of the outer circle is guaranteed, and meanwhile, a press-fit guide part is formed at the lower section of the outer circle of the connecting piece.
The injection mold comprises an upper mold, a lower mold, a mold core with external threads, a core rod, a second core rod, wherein the mold core and the periphery of the connecting sheet are well positioned by the lower mold, the upper mold is closed, the core rod and the second core rod are inserted into the upper mold, plastic in a molten state is injected from a pouring opening of the upper mold to form an internal thread part, and the position of the pouring opening corresponds to a second step part of the internal thread part. When the internal thread part is injection molded, a plurality of lateral planes are formed, so that the mold core can be conveniently rotated and pulled out. The mold core and the connecting piece are positioned by adopting the lower mold, so that the coaxiality of the periphery of the connecting piece and the inner hole of the internal thread part is easy to ensure.
The valve is characterized in that a connecting seat is further fixed in the inner cavity of the valve shell, the connecting seat is arranged at the lower part of the connecting sheet, and a valve core guide hole matched with the valve core is formed in the connecting seat.
The invention can achieve the following beneficial effects: 1. the positioning of the internal thread part adopts the positioning of the periphery of the cup body of the inverted cup shape of the connecting sheet, so that the positioning precision of the internal thread part is improved, the connecting sheet and the valve shell are both made of metal, the hardness of the connecting sheet is the same as that of the valve shell, the press mounting coaxiality is easier to ensure (if plastics and metal are press-mounted, the press mounting is easy to deviate to one soft side because the plastics are softer), and the guiding precision of the valve core is improved.
2. The two small holes are formed on the same side of the internal thread part, one is a blind hole fixing elastic rail, and the other is a through hole ensuring smooth internal and external gas, so that the two small holes are arranged on the same side, the setting of a core pulling structure of the die is facilitated, and the design of the die is greatly simplified. Meanwhile, the elastic rail is directly inserted into the blind hole, so that the structure is simple, the fixing is reliable, and the size requirement on the internal thread part can be reduced.
3. The periphery of the connecting piece cup body is subjected to turning, so that the dimensional accuracy can be improved, the positioning of the periphery of the connecting piece during injection molding of a die is facilitated, the subsequent pressing of the connecting piece into the valve shell is facilitated, meanwhile, the connecting piece is subjected to stamping and then metal processing, and the manufacturing cost of the connecting piece can be controlled.
4. The valve core guide hole, the valve port and the internal thread part mounting hole of the valve shell are all clamped and turned once, so that the position accuracy is good, and the coaxiality assurance capability of the valve core and the valve port is further improved. Therefore, the positioning length of the connecting sheet and the valve shell can be designed to be longer, and the installation reliability of the internal thread part is further improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structure of the elastic track of the internal thread part jacket of the present invention.
Fig. 3 is a schematic structural view of the elastic rail of the present invention.
Fig. 4 is a schematic structural view of the female screw member.
Fig. 5 is a schematic structural view of the connecting piece.
Fig. 6 is a schematic structural view of an injection mold.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1-2, the invention comprises a valve body housing 1, a valve housing 2, an internal thread part 3, an external thread part 4, a connecting sheet 9 and a valve core 5 which are formed by punching and are in inverted cup shape, wherein the valve body housing 1 is fixedly arranged at the top of the valve housing, the inner cavity of the valve body housing is communicated with the inner cavity of the valve housing, a lateral opening for installing a transverse connecting pipe is arranged at the side part of the valve housing 2, a valve port for installing a valve core seat 7 is arranged at the bottom of the valve housing 2, the internal thread part 3 is arranged in the inner cavity of the valve body housing, the internal thread part is provided with a round hole with internal threads matched with the external threads of the external thread part, the external thread part is arranged in the round hole of the internal thread part in a threaded mode, the top of the external thread part penetrates out of the round hole and is connected with a rotor 6 arranged at the valve body housing, the bottom of the external thread part is connected with the valve core, and the valve core is matched with a valve core seat fixedly arranged at the valve port; the rotary motion of the rotor is converted into linear motion of the valve core, so that the valve core is close to or far from a valve port on the valve core seat; the top of the connecting piece 9 is provided with a through hole communicated with the cup cavity, the connecting piece is sleeved at the bottom of the internal thread part through the through hole, the internal thread part is injection molded through an injection mold and is fixed with the internal thread part through the injection mold, and the outer periphery of the connecting piece is attached to the inner cavity wall of the valve shell and is fixed through laser welding. Preferably, as shown in fig. 5, the through hole formed at the top of the connecting piece is a polygonal hole 91, so that the plastic combination of the connecting piece and the internal thread part is more reliable, and the relative rotation between the internal thread part and the connecting piece is prevented; the outer edge of the top of the connecting sheet is provided with a plurality of small holes.
As shown in fig. 3-4, two small holes are formed on the same side of the outer periphery of the internal thread part above the connecting sheet, one small hole is a through hole 321 with the center line of the internal thread part intersecting with the center line of the internal thread part, and the other small hole is an eccentric blind hole 322; the outer peripheral portion of the female screw member 3 is externally fitted with an elastic rail 8, and the bottom of the elastic rail 8 has a positioning cross portion 83 which is inserted into the eccentric blind hole. The elastic rail is also provided with a lower stop part 82 and a connecting transverse part 85, the spiral part 84 of the elastic rail is connected with the lower stop part 82 by the connecting transverse part 85, the lower stop part is connected with the positioning transverse part, the lower stop part 82 is parallel to the central axis of the internal thread part, and the positioning transverse part is perpendicular to the lower stop part.
Further, as shown in fig. 4, the female screw member has four steps with sequentially increasing outer diameters from top to bottom, and a first step 31, a second step 32, a third step 33 and a fourth step 34 are sequentially arranged from top to bottom, wherein a spiral portion 84 of the elastic track is fitted around the outer periphery of the first step, and the spiral portion and the outer periphery of the first step form a spiral track; the second step portion is provided with a planar portion circumscribed with a circumferential surface of the second step portion, and the eccentric blind hole is provided on the planar portion. The third step portion is provided with a plane 331 inscribed with the circumferential surface of the third step portion, the inscribed planes are arranged in pairs, and the purpose of the inscribed plane arrangement is as follows: because the mold core needs to be rotationally demolded, the internal thread part can be prevented from rotating due to the existence of the inscribed plane. The fourth step portion is formed by the connecting piece outer peripheral portion. Preferably, the connecting piece is formed by stamping a metal plate, an outer circle of the connecting piece is machined by clamping the inner diameter of the cup body of the connecting piece by adopting an inner expansion chuck, the dimensional accuracy of the outer circle is ensured, and meanwhile, a press-fit guide part 41 is formed at the lower section of the outer circle of the connecting piece.
Further, as shown in fig. 6, the injection mold includes an upper mold 100, a lower mold 200, a mold core 500 with external threads, a core pulling rod 300, and a second core pulling rod 400, wherein the outer circumferences of the mold core 500 and the connecting piece are positioned by the lower mold, the upper mold is closed, the core pulling rod 300 and the second core pulling rod 400 are inserted into the upper mold 100, and plastic in a molten state is injected from an upper mold injection port 101, thereby forming the female screw member 3, and the position of the injection port corresponds to the second step portion 32 of the female screw member. When the internal thread part is injection molded, a plurality of lateral planes are formed, so that the mold core can be conveniently rotated and pulled out. The mold core and the connecting piece are positioned by adopting the lower mold, so that the coaxiality of the periphery of the connecting piece and the inner hole of the internal thread part is easy to ensure.
In addition, the inner cavity of the valve shell is also fixedly provided with a connecting seat 20 which is arranged at the lower part of the connecting sheet, and the connecting seat is provided with a valve core guide hole 21 matched with the valve core.
Claims (6)
1. The electric valve for regulating the fluid flow comprises a valve body outer cover, a valve shell, an internal thread part, an external thread part and a valve core, wherein the valve body outer cover is fixedly arranged at the top of the valve shell, an inner cavity of the valve body outer cover and an inner cavity of the valve shell are communicated with each other, a lateral opening for installing a transverse connecting pipe is arranged at the side part of the valve shell, a through hole for installing a valve core seat is arranged at the bottom of the valve shell, the internal thread part is arranged in the inner cavity of the valve body outer cover, a round hole with internal threads matched with the external thread of the external thread part is arranged in the round hole of the internal thread part in a threaded mode, the top of the external thread part penetrates out of the round hole and is connected with a rotor arranged in the inner cavity of the valve body outer cover, the bottom of the external thread part is connected with the valve core, and the valve core is close to or far away from a valve port on the valve core seat; the method is characterized in that: the valve is characterized by further comprising a connecting piece which is formed by stamping and is in an inverted cup shape, wherein a through hole which is communicated with the cup cavity is formed in the top of the connecting piece, the internal thread part is formed by injection molding of an injection mold, the plane of the top of the connecting piece and the internal thread part are integrally fixed by injection molding of the injection mold, and the peripheral part of the connecting piece is abutted against the inner cavity wall of the valve shell and fixed by laser welding;
two small holes are formed in the same side of the outer periphery of the internal thread part above the connecting sheet, wherein one small hole is a through hole with the center line of the through hole intersecting with the center line of the internal thread part, and the other small hole is an eccentric blind hole; an elastic rail is sleeved outside the outer periphery of the internal thread part, and the bottom of the elastic rail is provided with a positioning transverse part which is inserted into the eccentric blind hole;
the injection mold at least comprises an upper mold, a lower mold, a mold core with external threads, a core rod and a second core rod, wherein the mold core and the periphery of the connecting sheet are positioned by the lower mold, the upper mold is closed, the core rod and the second core rod are inserted into the upper mold, and plastics in a molten state are injected from a pouring port of the upper mold to form an internal thread component;
the internal thread part is provided with four step parts with sequentially increased outer diameters from top to bottom, and a first step part, a second step part, a third step part and a fourth step part are sequentially arranged from top to bottom, wherein the spiral part of the elastic track is matched and sleeved on the periphery of the first step part, and the spiral part and the periphery of the first step part form a spiral track; the third step part is provided with a plane inscribed with the circumferential surface of the third step part, and the fourth step part is formed by the outer circumferential part of the connecting sheet; the second step part is provided with a plane part which is circumscribed with the circumferential surface of the second step part, and the eccentric blind hole is arranged on the plane part.
2. An electrically operated valve for regulating fluid flow as set forth in claim 1, wherein: the through hole formed in the top of the connecting sheet is a polygonal hole, and a plurality of small holes are formed in the outer edge of the top of the connecting sheet.
3. An electrically operated valve for regulating fluid flow as set forth in claim 1, wherein: the elastic rail is also provided with a lower stop part and a connecting transverse part, the spiral part of the elastic rail is connected with the lower stop part by the connecting transverse part, the lower stop part is connected with the positioning transverse part, the lower stop part is parallel to the central axis of the internal thread part, and the positioning transverse part is vertical to the lower stop part.
4. An electrically operated valve for regulating fluid flow as set forth in claim 1, wherein: the connecting piece is formed by stamping a metal plate, an outer circle of the connecting piece is machined by adopting an inner expanding chuck to clamp the inner diameter of the cup body of the connecting piece, the dimensional accuracy of the outer circle is guaranteed, and meanwhile, a press-fit guide part is formed at the lower section of the outer circle of the connecting piece.
5. An electrically operated valve for regulating fluid flow as set forth in claim 1, wherein: the position of the pouring gate corresponds to the second step part of the internal thread part.
6. An electrically operated valve for regulating fluid flow as set forth in claim 1, wherein: the valve is characterized in that a connecting seat is further fixed in the inner cavity of the valve shell, the connecting seat is arranged at the lower part of the connecting sheet, and a valve core guide hole matched with the valve core is formed in the connecting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711339785.5A CN107883003B (en) | 2017-12-14 | 2017-12-14 | Electric valve for regulating fluid flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711339785.5A CN107883003B (en) | 2017-12-14 | 2017-12-14 | Electric valve for regulating fluid flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107883003A CN107883003A (en) | 2018-04-06 |
| CN107883003B true CN107883003B (en) | 2023-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711339785.5A Active CN107883003B (en) | 2017-12-14 | 2017-12-14 | Electric valve for regulating fluid flow |
Country Status (1)
| Country | Link |
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| CN (1) | CN107883003B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183547A (en) * | 2019-11-19 | 2022-03-15 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534158A (en) * | 2015-01-09 | 2015-04-22 | 赵肖运 | Expansion valve |
| CN104565392A (en) * | 2015-01-05 | 2015-04-29 | 浙江三花股份有限公司 | Electric valve |
| CN104896810A (en) * | 2014-03-05 | 2015-09-09 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN104913098A (en) * | 2014-03-13 | 2015-09-16 | 浙江盾安禾田金属有限公司 | Electronic expansion valve stop structure and electronic expansion valve |
| CN106246983A (en) * | 2015-06-11 | 2016-12-21 | 浙江盾安禾田金属有限公司 | A kind of electronic expansion valve check structure |
-
2017
- 2017-12-14 CN CN201711339785.5A patent/CN107883003B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896810A (en) * | 2014-03-05 | 2015-09-09 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN104913098A (en) * | 2014-03-13 | 2015-09-16 | 浙江盾安禾田金属有限公司 | Electronic expansion valve stop structure and electronic expansion valve |
| CN104565392A (en) * | 2015-01-05 | 2015-04-29 | 浙江三花股份有限公司 | Electric valve |
| CN104534158A (en) * | 2015-01-09 | 2015-04-22 | 赵肖运 | Expansion valve |
| CN106246983A (en) * | 2015-06-11 | 2016-12-21 | 浙江盾安禾田金属有限公司 | A kind of electronic expansion valve check structure |
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| Publication number | Publication date |
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| CN107883003A (en) | 2018-04-06 |
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