CN107906214B - Flow control valve - Google Patents

Flow control valve Download PDF

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Publication number
CN107906214B
CN107906214B CN201711340832.8A CN201711340832A CN107906214B CN 107906214 B CN107906214 B CN 107906214B CN 201711340832 A CN201711340832 A CN 201711340832A CN 107906214 B CN107906214 B CN 107906214B
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CN
China
Prior art keywords
valve
thread part
connecting seat
inner cavity
shell
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Active
Application number
CN201711340832.8A
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Chinese (zh)
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CN107906214A (en
Inventor
王林炜
王小江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Zhongbao Auto Control Component Co ltd
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Zhejiang Zhongbao Auto Control Component Co ltd
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Application filed by Zhejiang Zhongbao Auto Control Component Co ltd filed Critical Zhejiang Zhongbao Auto Control Component Co ltd
Priority to CN201711340832.8A priority Critical patent/CN107906214B/en
Publication of CN107906214A publication Critical patent/CN107906214A/en
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Publication of CN107906214B publication Critical patent/CN107906214B/en
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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
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • 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
    • 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
    • F16K27/102—Welded housings for lift-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • 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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Valve Housings (AREA)
  • Sliding Valves (AREA)

Abstract

The internal thread part is arranged in the inner cavity of the valve body outer cover, the internal thread part is provided with a round hole matched with the external thread of the external thread part and provided with internal thread, the external thread part is movably arranged in the round hole of the internal thread part through threads, 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 a valve core, and the valve core is close to or far away from an upper valve port of the valve core seat; a connecting seat is arranged in the inner cavity of the valve shell, the outer periphery of the connecting seat is matched and attached to the inner cavity wall of the valve shell, a lateral hole corresponding to the lateral opening in a matched manner is arranged on the outer periphery of the connecting seat, and the transverse connecting pipe is fixedly arranged in the lateral opening and the lateral hole; the top of the connecting seat is provided with an opening matched with the valve core, the circumferential wall of the opening is downwards suspended to form a hollow bulge, the valve core is arranged in an inner hole of the hollow bulge in a penetrating mode, the valve shell can be thinned to the greatest extent, and the manufacturing difficulty and cost of the valve shell are reduced.

Description

Flow control valve
Technical Field
The invention belongs to the technical field of valve bodies, and particularly relates to a flow control valve.
Background
CN204004479U discloses a flow control valve, and the uide bushing is established on the valve core seat, because the miniaturized problem of flow control valve is considered, the cover height must not be too high, and its positioning accuracy also must not be too high, and the uide bushing just also hardly reaches the design requirement to the case positioning accuracy. 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. Meanwhile, the inner cavity and the outer cavity of the guide sleeve are communicated by virtue of small holes on the circumference of the guide sleeve, the flow channel structure not only can influence the smoothness of a flow channel and cause additional pressure drop, so that the maximum refrigerating capacity of products with the same caliber is reduced, but also the problem that the flow channel is too complicated and causes overlarge flowing sound of a refrigerant and the like can influence the comfort of an air conditioning system. In addition, the transverse connection pipe is directly fixed in the lateral hole of the valve shell, so that the valve shell is necessarily required to be thicker in wall thickness, and the fixing reliability of the transverse connection pipe and the valve shell can be ensured, thereby increasing the cost of the valve shell and the manufacturing difficulty of the valve shell.
Disclosure of Invention
In view of the foregoing background, the present invention is directed to a flow control valve that is reliable in construction.
For this purpose, the invention adopts the following technical scheme: the flow control valve 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, the inner cavity of the valve body outer cover and the 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 on the internal thread part, the external thread part is movably arranged in the round hole of the internal thread part through threads, 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 an upper valve port of the valve core seat; the method is characterized in that: the inner cavity of the valve shell is provided with a connecting seat, the outer periphery of the connecting seat is matched and attached to the inner cavity wall of the valve shell, the outer periphery of the connecting seat is provided with a lateral hole matched and corresponding to the lateral opening, and the transverse connecting pipe is fixedly arranged in the lateral opening and the lateral hole; the top end of the connecting seat is provided with an opening matched with the valve core, the circumferential wall of the opening is downwards suspended to form a hollow bulge, and the valve core is arranged in an inner hole of the hollow bulge in a penetrating mode.
The invention also comprises the following technical characteristics as supplement and improvement of the technical scheme.
The transverse connecting pipe is inserted into the lateral opening of the valve shell and the lateral hole of the connecting seat, and the connecting seat, the valve shell and the transverse connecting pipe are welded and fixed through brazing.
The connecting seat is arranged at the middle lower section of the inner cavity of the valve shell, the upper section of the inner cavity of the valve shell is provided with an internal thread mounting hole, and a connecting sheet for fixing the internal thread component is arranged in the internal thread mounting hole in a matching manner.
The top end of the connecting seat is provided with a plurality of small holes.
A process for machining a valve seat assembly of a flow control valve, comprising the steps of:
step one: the connecting seat and the valve shell are formed by punching plates, and a valve core seat blank is machined;
step two: placing the connecting seat into the valve shell, performing laser welding between the valve shell and the connecting seat, and enabling a welding line to be positioned at the joint of the top end surface of the connecting seat and the valve shell;
step three: placing the valve core seat into an opening with a bulge of the valve shell, and performing laser welding at the joint of the lower bottom surface of the valve core seat and the inner periphery of the opening;
step four: positioning the periphery of the valve shell, processing an inner hole of a hollow bulge of the connecting seat, processing a valve port of the valve core seat, a valve port end face, a positioning step of an outer cover of the valve shell and an installation hole of an internal thread part; the coaxiality among the hollow convex inner hole of the connecting seat, the valve port of the processing valve core seat and the mounting hole of the internal thread part can be fully ensured;
step five: pressing the vertical connecting pipe into an opening with a bulge of the valve shell, and prefabricating a welding ring at the joint of the connecting pipe and the valve shell before or after the pipe is in press connection;
step six: the transverse connecting pipe is inserted into a lateral opening of the valve shell, a welding ring is prefabricated on the outer diameter of the front end of the transverse connecting pipe before insertion, the assembled valve seat assembly is placed on welding, and the valve seat assembly is placed into a tunnel furnace for welding, so that the valve seat assembly is formed.
The method also comprises the following steps: the welding ring is put into the valve shell and then into the connecting seat;
the method also comprises the following steps: the valve shell and the connecting seat are drilled together with the lateral holes, and before drilling, the lateral holes on the valve shell and the lateral holes on the connecting seat are valued in the range of 0-phi D-0.5, so that the arrangement is mainly to avoid the axial dimension error existing in the assembly of the valve shell and the connecting seat, if the lateral holes are processed to phi D in advance, the two holes are difficult to coincide due to the assembly error of the two holes, so that the assembly precision of the lateral holes and the connecting pipe is problematic, and meanwhile, the pre-holes exist, so that the allowance of the subsequent drilling can be reduced; and cleaning the valve seat assembly, and blowing out iron dust in the cavity and residual burrs on the valve seat assembly.
The invention can achieve the following beneficial effects: 1. according to the invention, the connecting seat is in an inverted cup shape and is inserted into the valve shell, the transverse connecting pipe is welded and fixed with the lateral holes of the connecting seat and the valve shell, so that the length of a welding line of the transverse connecting pipe is ensured, the valve shell can be thinned to the greatest extent, and the manufacturing difficulty and cost of the valve shell are reduced.
2. Because the connecting seat is in the shape of an inverted cup and is inserted into the valve shell, the occupation of the space of the valve shell can be reduced, and the installation position of the internal thread part is reserved for the upper part of the valve shell.
3. The flange to the inner chamber is set up on the connecting seat, provides the direction for the case, has guaranteed the axiality of case, has reduced the rocking of case.
4. Because the main flow path of the fluid is not blocked by the arrangement of the connecting seat, the extra flow resistance of the flow path is not increased, the maximum refrigerating capacity of the product with the same caliber is ensured, and the noise of the refrigerant is not influenced.
5. Because the valve core guide hole, the valve port and the internal thread mounting hole are all clamped and turned once, the position accuracy is good, and the coaxiality assurance capability of the valve core and the valve port is further improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic exploded view of the valve housing of the present invention.
FIG. 3 is a schematic view of the assembly process of the valve seat of the present invention.
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 7, an external thread part 6 and a valve core 5, wherein the valve body housing is fixedly arranged at the top of the valve housing, the inner cavity of the valve body housing and the inner cavity of the valve housing are mutually communicated, a lateral opening for installing a transverse connecting pipe is arranged at the side part of the valve housing, a valve port for installing a valve core seat 4 is arranged at the bottom of the valve housing, the internal thread part is arranged in the inner cavity of the valve body housing, a round hole with internal thread 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 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 the 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 inner cavity of the valve shell is provided with a connecting seat 3, the outer periphery of the connecting seat is matched and mounted with the inner cavity wall of the valve shell in an abutting mode, the outer periphery of the connecting seat is provided with a lateral hole corresponding to the lateral opening in a matched mode, the transverse connecting pipe 15 is fixedly mounted in the lateral opening and the lateral hole, the transverse connecting pipe 15 is inserted into the lateral opening of the valve shell and the lateral hole of the connecting seat, and the connecting seat, the valve shell 2 and the transverse connecting pipe 15 are welded and fixed through brazing. The top end of the connecting seat is provided with an opening matched with the valve core, the circumferential wall of the opening is downwards suspended to form a hollow bulge, and the valve core is arranged in an inner hole of the hollow bulge in a penetrating mode. Preferably, the connecting seat is arranged at the middle lower section of the inner cavity of the valve shell, the upper section of the inner cavity of the valve shell is a threaded hole, and a connecting sheet for fixing the internal thread part is arranged in the threaded hole in a matched mode.
As shown in fig. 3, the above-mentioned valve seat assembly forming process steps are as follows:
I. the connecting seat and the valve shell are formed by punching plates, and a valve core seat blank is machined;
II. Placing the connecting seat into a valve shell, and performing laser welding between the valve shell and the connecting seat, wherein the welding seam is arranged at the joint of the top end surface of the connecting seat and the valve shell;
III, placing the valve core seat into a valve shell bulge 26, and performing laser welding at the joint of the lower bottom surface of the valve core seat and the inner periphery of the valve shell bulge;
IV, positioning by the outer periphery 28 of the valve shell, processing a connecting seat guide hole 31b, processing a valve port 62b, a valve port end face 61b, a shell positioning step 27b of the valve shell and an internal thread part mounting hole 24b; the above-mentioned relevant parts are clamped once, and the coaxiality among the guide hole 31b of the connecting seat, the valve port 62b, the positioning step 27b of the outer cover and the mounting hole 24b of the internal thread part can be fully ensured.
V. the vertical connection tube 16 is pressed into the valve housing boss 26 and a weld ring is preformed at the junction of the connection tube and the valve housing either before or after crimping the tube.
VI, inserting the transverse connecting pipe 15 into a lateral hole of the valve shell, prefabricating a welding ring on the outer diameter of the front end of the transverse connecting pipe before insertion, putting the assembled valve seat assembly on welding, and putting the valve seat assembly into a tunnel furnace for welding to form the valve seat assembly.
Preferably, the method further comprises the following steps before the second step: the welding ring is put into the valve shell and then into the connecting seat; the method also comprises the following steps: the lateral holes 25b and 33b are drilled together on the valve shell and the connecting seat, and before drilling, the lateral holes on the valve shell and the lateral holes of the connecting seat are taken from (0-phi D-0.5), so that the axial dimension errors existing in the assembly of the valve shell and the connecting seat are mainly avoided, if the lateral holes are machined to phi D in advance, the two holes are difficult to coincide due to the assembly errors of the lateral holes and the connecting seat, the assembly precision of the lateral holes and the connecting pipe is problematic, and meanwhile, the pre-holes exist, so that the allowance of subsequent drilling can be reduced. And cleaning the valve seat assembly, and blowing out iron dust in the cavity and residual burrs on the valve seat assembly.

Claims (3)

1. The flow control valve 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, the inner cavity of the valve body outer cover and the 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 on the internal thread part, the external thread part is movably arranged in the round hole of the internal thread part through threads, 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 an upper valve port of the valve core seat; the method is characterized in that: the inner cavity of the valve shell is provided with a connecting seat, the outer periphery of the connecting seat is matched and attached to the inner cavity wall of the valve shell, the outer periphery of the connecting seat is provided with a lateral hole matched and corresponding to the lateral opening, and the transverse connecting pipe is fixedly arranged in the lateral opening and the lateral hole; the top end of the connecting seat is provided with an opening matched with the valve core, the circumferential wall of the opening is downwards suspended to form a hollow bulge, and the valve core is arranged in an inner hole of the hollow bulge in a penetrating way; the top end of the connecting seat is provided with a plurality of small holes.
2. A flow control valve according to claim 1, wherein: the transverse connecting pipe is inserted into the lateral opening of the valve shell and the lateral hole of the connecting seat, and the connecting seat, the valve shell and the transverse connecting pipe are welded and fixed through brazing.
3. A flow control valve according to claim 1, wherein: the connecting seat is arranged at the middle lower section of the inner cavity of the valve shell, the upper section of the inner cavity of the valve shell is provided with an internal thread mounting hole, and a connecting sheet for fixing the internal thread component is arranged in the internal thread mounting hole in a matching manner.
CN201711340832.8A 2017-12-14 2017-12-14 Flow control valve Active CN107906214B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711340832.8A CN107906214B (en) 2017-12-14 2017-12-14 Flow control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711340832.8A CN107906214B (en) 2017-12-14 2017-12-14 Flow control valve

Publications (2)

Publication Number Publication Date
CN107906214A CN107906214A (en) 2018-04-13
CN107906214B true CN107906214B (en) 2023-05-19

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CN201711340832.8A Active CN107906214B (en) 2017-12-14 2017-12-14 Flow control valve

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108397558B (en) * 2018-05-14 2024-06-07 浙江中宝自控元件有限公司 High-fit-precision electric valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003074730A (en) * 2001-09-03 2003-03-12 Saginomiya Seisakusho Inc Motor-operated valve
CN103453699A (en) * 2012-05-29 2013-12-18 浙江三花股份有限公司 Electronic expansion valve
CN103836851A (en) * 2014-03-25 2014-06-04 浙江三花股份有限公司 Valve seat assembly of electronic expansion valve and manufacturing method of valve seat assembly
CN105276199A (en) * 2014-07-18 2016-01-27 株式会社鹭宫制作所 Electric valve
WO2017168942A1 (en) * 2016-03-29 2017-10-05 株式会社鷺宮製作所 Motor-operated valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003074730A (en) * 2001-09-03 2003-03-12 Saginomiya Seisakusho Inc Motor-operated valve
CN103453699A (en) * 2012-05-29 2013-12-18 浙江三花股份有限公司 Electronic expansion valve
CN103836851A (en) * 2014-03-25 2014-06-04 浙江三花股份有限公司 Valve seat assembly of electronic expansion valve and manufacturing method of valve seat assembly
CN105276199A (en) * 2014-07-18 2016-01-27 株式会社鹭宫制作所 Electric valve
WO2017168942A1 (en) * 2016-03-29 2017-10-05 株式会社鷺宮製作所 Motor-operated valve

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