CN114483966A - Straight-stroke plastic regulating valve and processing method thereof - Google Patents
Straight-stroke plastic regulating valve and processing method thereof Download PDFInfo
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- CN114483966A CN114483966A CN202210055407.9A CN202210055407A CN114483966A CN 114483966 A CN114483966 A CN 114483966A CN 202210055407 A CN202210055407 A CN 202210055407A CN 114483966 A CN114483966 A CN 114483966A
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- 239000004033 plastic Substances 0.000 title claims abstract description 33
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- 238000007789 sealing Methods 0.000 claims abstract description 23
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Classifications
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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
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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
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
Abstract
The invention discloses a straight-stroke plastic regulating valve and a processing method thereof, wherein the regulating valve comprises: the valve comprises a valve body, a valve seat, a valve cage, a valve rod and a valve rod, wherein the valve seat is of a hollow annular structure, the valve cage is positioned above the valve seat and consists of a hollow annular piece and a horizontally arranged circular sealing plate, the annular piece is positioned below the valve seat, the sealing plate is positioned above the valve seat, a neutral hole is formed in the center of the sealing plate, one side opening of the annular piece is sealed by the sealing plate to form the valve cage, a containing hole is formed in the lower end face of the upper valve cover from bottom to top along the axis, and the lower end of the valve rod sequentially penetrates through the inner cavity of the upper valve cover, the neutral hole of the sealing plate and the inner cavity of the annular piece from top to bottom and then extends into the inner cavity of the valve seat; the straight-stroke plastic regulating valve has the advantages of reasonable structural design, simple structure, convenience in maintenance, capability of modular production, high strength, high pressure bearing capacity, no leakage, good sealing performance, convenience in use, safety, reliability and long service life, and the valve body is integrally processed and formed by adopting plastic bars.
Description
Technical Field
The invention belongs to the field of regulating valves, and particularly relates to a straight-stroke plastic regulating valve and a processing method thereof.
Background
The metal regulating valve has a history of being used for nearly one hundred years, and has wide application in the modern industrial field due to the stability, accurate control precision, firmness and durable stability. The metal regulating valve is often matched with accessories such as a manual actuator, a pneumatic actuator, an electric actuator, a valve positioner, an electromagnetic valve, a limit switch and the like to realize the accurate regulation and control of liquid level, temperature, pressure, flow and the like of fluid media. Is an indispensable executive component in the automatic control link of the modern factory.
At present, all existing regulating valves are mainly made of metal materials, common metal materials comprise cast iron, common carbon steel, stainless steel, high alloy steel, materials such as titanium alloy, aluminum alloy, high nickel alloy and tantalum alloy under special corrosion-resistant working conditions, and the regulating valves are high in material price, high in processing difficulty and low in economy. In addition, the metal material has large surface friction force, needs a large amount of grease lubrication, and is easy to pollute fluid media.
Along with the development of the times, people pay more and more attention to the protection of the natural environment, and the modern industry has the trend of 'replacing steel with plastics' to reduce the cost, protect the environment and improve the efficiency. With the continuous emergence of various fine chemical new materials, such as lithium battery materials, aerogel, photoelectric materials and the like, the working conditions of high corrosion resistance, high cleanness, metal ion removal, copper and zinc inhibition, grease inhibition and the like are required, and the problems of high cost, high processing difficulty, high energy consumption, environmental pollution and the like exist when the conventional metal regulating valve is reused. Therefore, new plastic regulating valves are urgently needed to be developed to meet the normal use of the working conditions.
Most plastic valves in the existing market adopt injection molding like ball valves, butterfly valves, stop valves and the like, and plastic regulating valves are not available in the market, so that a plurality of defects exist in the processing and using processes, such as: the finished product is easy to shrink and deform, the surface of the finished product is not glossy (burrs and flashes), and pores, cracks, black spots, caking, black lines and the like are formed in the finished product. The injection molding process requires relatively accurate temperature and pressure, and the technical difficulty is high. When the pressure of the fluid medium is high, the strength of the valve body is greatly reduced, and the fluid medium is easy to leak out in the use occasions with large pressure difference and high flow rate. The injection molding plastic valve has the defects of short service life, poor practicability, low maintenance rate and incapability of meeting a plurality of working condition requirements. And the plastic valves on the market at present have various specifications, which require a large number of molds, are high in cost and waste resources.
Disclosure of Invention
The invention aims to provide a straight-stroke plastic regulating valve and a processing method thereof, and aims to solve the problems that the existing regulating valve manufactured by injection molding has various defects in the processing and using processes, the temperature and the pressure required in the injection molding process are relatively accurate, and the technical difficulty is high.
The invention adopts the following technical scheme: a straight travel plastic regulating valve comprising:
the valve body is of a closed structure, the two sides of the valve body are respectively provided with an inlet and an outlet, an inlet hole is horizontally arranged from the inlet to the interior of the valve body, an outlet hole is horizontally arranged from the outlet to the interior of the valve body,
the valve seat is of a hollow annular structure and is vertically arranged, the hollow inner cavity of the valve seat is in the vertical direction and is positioned above the inner end of the inlet hole and at the central position inside the valve body,
the valve cage is positioned above the valve seat and consists of a hollow annular piece and a horizontally arranged circular sealing plate, the annular piece is positioned below the valve seat, the sealing plate is positioned above the valve seat, the axis of the annular piece is superposed with the axis of the valve seat, a neutral hole is formed in the center of the sealing plate, the sealing plate seals an opening on one side of the annular piece to form the valve cage, a plurality of adjusting holes are formed in the outer wall of the annular piece,
the upper valve cover is positioned above the valve cage and is of a hollow annular structure, the axis of the upper valve cover is superposed with the axis of the valve seat, the lower end surface of the upper valve cover is provided with a containing hole along the axis from bottom to top, the containing hole is used for containing the upper half section of the valve cage, the lower end of the upper valve cover is propped against the upper end of the valve body and is matched with the valve body to form a containing cavity with the valve cage as the center,
the valve rod, vertical setting, its lower extreme top-down passes the inner chamber of upper valve gap in proper order, the neutral position hole of shrouding, the inner chamber of disk seat is followed and stretched into to the inner chamber of loop forming element, wherein, the inclined hole has been seted up to the inside of valve body, the one end of inclined hole with hold the cavity intercommunication, the other end and the intercommunication of leaving the hole, the valve rod is used for reciprocating, make its lower extreme adjust and stretch into the position that holds the cavity, then adjust and hold the remaining volume of cavity, make the fluid medium who gets into from the import loop through the valve body inner chamber, the loop forming element inner chamber, and the fluid medium flow through leaving the hole outflow export behind the inclined hole is adjusted through the regulation hole of loop forming element.
Furthermore, the upper end of the valve rod is connected with an actuator, and the actuator is used for driving the valve rod to move up and down, so that the equal sectional areas of the valve rod and the valve seat are changed, and the flow of fluid media passing through the valve body is adjusted.
Further comprises a gland which is of an annular structure, the lower end of the gland is provided with an external thread,
the upper half section of the inner cavity of the upper valve cover is provided with internal threads, and the internal threads are used for being matched with the external threads of the gland, so that the gland extends into the inner cavity of the upper valve cover from top to bottom and seals the inner cavity of the upper valve cover.
Further, the lower end of the gland and the inner cavity of the upper valve cover are also filled with sealing rings.
Furthermore, the upper end and the lower extreme of upper valve cover all outwards extend and form fixed station and lower fixed station, and the fixed station is used for being connected and fixed with the executor through the bolt on, and lower fixed station is used for passing through with the bolt and with disk seat fixed connection.
A processing method of a straight-stroke plastic regulating valve comprises the following steps:
step S1: three-dimensional modeling, drawing a model of each accessory of the plastic regulating valve,
step S2: simulation test, using three-dimensional CAD software to test the wall thickness strength, the operating moment, the flow speed, the flow characteristic and the CV value of each designed accessory,
step S3: blanking bar stock, selecting bar stock with diameter larger than that of each accessory,
step S4: the CNC machining center is used for machining,
step S5: and (4) checking the test result,
step S6: assembling and assembling the pneumatic actuator, and testing to be qualified,
when the upper valve cover is machined in step S4, the method includes the following steps:
a rod material with the same diameter as the upper valve cover is taken, a guide hole for the valve rod to pass through is formed along the axis of the rod material after the rod material is clamped by a clamp, the upper half section of an accommodating hole for accommodating the valve cage is processed around one end of the guide hole, and then a fixing hole for the gland to stretch into is processed around the other end of the accommodating hole.
Further, when the valve body is processed in step S4, the processing includes the steps of:
taking a bar with the same outer diameter as the valve body, clamping by using a clamp to enable the axis of the bar to be horizontally arranged,
a horizontal reference surface is cut on the upper half section of the bar, the reference surface is used for matching with the upper valve cover,
a lower half section of a containing hole for containing the valve cage, the valve seat and the lower half section of the valve rod is downwards arranged from top to bottom along the central position of the datum plane,
adjusting the base of the machining center to make the plane of the base be 30 degrees with the horizontal plane, then machining an inclined hole through the accommodating hole,
adjusting the base of the machining center to enable the plane of the base to be 90 degrees to the horizontal plane, then machining an inlet hole,
and adjusting the base of the machining center to enable the plane of the base to be 90 degrees to the horizontal plane, enabling the inlet hole to face downwards, and machining a hole.
Further, when the valve stem is machined in step S4, the machining process includes the steps of:
a bar with the same outer diameter as the valve rod is taken, the bar is clamped by a clamp, the axis of the bar is vertically arranged, redundant materials of the outer ring are cut off from top to bottom, and the valve rod is large in lower end, small in upper end and integrally formed.
Further, when the valve cage is machined in step S4, the machining includes:
a bar material with the same outer diameter as the valve cage is taken, a clamp is used for clamping, the axis of the bar material is vertically arranged, a middle position hole used for the valve rod to stretch into is formed in the axis of the bar material from top to bottom, an inner cavity used for containing a ring-shaped part at the lower end of the valve rod is machined around one end of the middle position hole, the base of the machining center is adjusted, the plane of the base and the horizontal plane are 90 degrees, and a plurality of adjusting holes are machined.
The invention has the beneficial effects that: the straight-stroke plastic regulating valve has the advantages of reasonable structural design, simple structure, convenience in maintenance, capability of modular production, high strength, high pressure bearing capacity, no leakage, good sealing performance, convenience in use, safety, reliability and long service life, and the valve body is integrally processed and formed by plastic bars; various advantages of the metal regulating valve are absorbed, and the metal regulating valve has the advantages of corrosion resistance, no metal ions, copper inhibition, zinc inhibition and the like; because the plastic material has self-lubricating property, grease lubrication is not needed, and the pollution of the grease to the fluid medium can be avoided; the development of injection molds with a large number of specifications is not needed, the processes of heat treatment, grinding and the like of materials are not needed during processing, the processing cost is low, the production efficiency is high, and the plastic regulating valves with different specifications can be produced in a large scale; the formed qualified bar is adopted for processing, the wall thickness of the valve body can be adjusted according to the use pressure, and meanwhile, the defects of air holes, cracks, black spots, caking, black lines and the like in the valve body can be avoided; the use strength of the valve body is greatly improved; the valve body, the upper valve cover, the valve rod and the like are integrally processed and formed by a CNC (computer numerical control) processing center, so that welding is avoided, and the use strength is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a valve body according to the present invention;
FIG. 3 is a schematic illustration of the cage of the present invention;
fig. 4 is a schematic structural view of the upper valve cover of the present invention.
Wherein: 1. a valve body; 2. a valve seat; 3. a cage; 4. entering a hole; 5. an outlet hole; 6. an annular member; 8. an adjustment hole; 9. an upper valve cover; 10. an accommodation hole; 11. an accommodating cavity; 12. a valve stem; 13. an inclined hole; 14. an actuator; 15. and (7) pressing the cover.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a straight-stroke plastic regulating valve, which comprises a valve body 1, a valve seat 2, a valve cage 3, an upper valve cover 9 and a valve rod 12, as shown in figure 1.
As shown in fig. 2, the valve body 1 is a closed structure, the inlet and the outlet are respectively arranged on two sides of the valve body 1, the inlet hole 4 is arranged from the inlet to the inner level of the valve body 1, the outlet hole 5 is arranged from the outlet to the inner level of the valve body 1, the valve seat 2 is of a hollow annular structure, the valve seat 2 is vertically arranged, the hollow inner cavity of the valve seat 2 moves up and down, and the valve seat 2 is located above the inner end of the inlet hole 4.
As shown in fig. 3, the valve cage 3 is located above the valve seat 2, the valve cage 3 is composed of a hollow annular part 6 and a horizontally arranged circular sealing plate, the annular part 6 is located below and the sealing plate is located above, the axis of the annular part 6 coincides with the axis of the valve seat 2, a neutral hole is formed in the center of the sealing plate, the sealing plate seals one side opening of the annular part 6 to form the valve cage 3, and a plurality of adjusting holes 8 are formed in the outer wall of the annular part 6.
As shown in fig. 4, the upper valve cover 9 is located above the valve cage 3, the upper valve cover 9 is a hollow annular structure, an axis of the upper valve cover 9 coincides with an axis of the valve seat 2, a receiving hole 10 is formed in a lower end surface of the upper valve cover 9 from bottom to top along the axis, the receiving hole 10 is used for receiving an upper half section of the valve cage 3, and a lower end of the upper valve cover 9 abuts against an upper end of the valve body 1 and is matched with the valve body 1 to form a receiving cavity 11 with the valve cage 3 as a center.
Vertical setting of valve rod 12, the lower extreme top-down of valve rod 12 passes upper valve cover 9's inner chamber in proper order, the meso position hole of shrouding, after the inner chamber of loop forming element 6 and stretch into the inner chamber of disk seat 2, wherein, the inclined hole 13 has been seted up to the inside of valve body 1, the one end of inclined hole 13 with hold cavity 11 intercommunication, the other end and 5 intercommunications that bore, valve rod 12 is used for reciprocating, make its lower extreme adjust and stretch into the position that holds cavity 11, adjust the volume that holds cavity 11 surplus then, make the water that gets into from inlet hole 4 loop through valve body 1 inner chamber, the inner chamber of loop forming element 6, and the water yield that gets into 5 after the inclined hole 13 and gets into behind the regulation hole 8 through loop forming element 6 is adjusted.
The upper end of the valve rod 12 is connected with an actuator 14, and the actuator 14 is used for driving the valve rod 12 to move up and down, so that the equal sectional area of the positions of the valve rod 12 and the valve seat 2 is changed, and the flow of the fluid medium passing through the valve body 1 is adjusted. The valve rod 12 of the invention is integrated into one piece, the existing valve rod 12 and valve core are directly connected by pin, the tail part of the valve core is punched and inserted into the valve rod 12, and then the assembly is punched and installed with pin for fixation, the structure has the problems that the strength of the valve rod is reduced, the pin has the risk of falling off, the valve core falls or is clamped in the valve cage 3, and certain potential safety hazard exists; the valve rod 12 is an integrated valve rod, so that holes are not required to be formed, pins are not required to be punched, the consistency of the valve rod 12 is guaranteed, and the strength of the valve rod 12 is improved.
The invention also comprises a gland 15, wherein the gland 15 is of an annular structure, the lower end of the gland 15 is provided with external threads, the upper half section of the inner cavity of the upper valve cover 9 is provided with internal threads, and the internal threads are used for being matched with the external threads of the gland 15, so that the gland 15 extends into the inner cavity of the upper valve cover 9 from top to bottom and seals the inner cavity of the upper valve cover 9. The lower end of the gland 15 and the inner cavity of the upper valve cover 9 are also filled with sealing rings.
The upper end and the lower end of the upper valve cover 9 both extend outwards to form an upper fixing table and a lower fixing table, the upper fixing table is used for being connected and fixed with the actuator 14 through bolts, and the lower fixing table is used for being connected with the bolts and fixedly connected with the valve seat 2.
The invention also discloses a processing method of the straight-stroke plastic regulating valve, which comprises the following steps:
step S1: three-dimensional modeling, drawing a model of each accessory of the plastic regulating valve,
step S2: simulation test, using three-dimensional CAD software to test the wall thickness strength, the operating moment, the flow speed, the flow characteristic and the CV value of each designed accessory,
step S3: blanking bar stock, selecting bar stock with diameter larger than that of each accessory,
step S4: the CNC machining center is used for machining,
step S5: and (4) checking the test result,
step S6: and assembling the pneumatic actuator 14, and testing to be qualified.
When the upper valve cover 9 is machined in step S4, the method includes the following steps:
a bar material with the same diameter as the upper valve cover 9 is taken, a guide hole for the valve rod 12 to pass through is formed along the axis of the bar material after the bar material is clamped by a clamp, the upper half section of the accommodating hole 10 for accommodating the valve cage 3 is processed around one end of the guide hole, and then a fixing hole for the gland 15 to extend into is processed around the other end of the accommodating hole 10.
When the valve body 1 is machined in step S4, the machining method includes the steps of:
taking a bar with the same outer diameter as the valve body 1, clamping by using a clamp to enable the axis of the bar to be horizontally arranged,
a horizontal reference surface is cut in the upper half of the bar, which is intended to cooperate with the upper valve cover 9,
a lower half section of a containing hole 10 for containing the valve cage 3, the valve seat 2 and the lower half section of the valve rod 12 is downwards arranged from top to bottom along the central position of the reference surface,
the base of the machining center is adjusted so that the plane of the base is 30 degrees from the horizontal plane, and then the inclined hole 13 is machined through the accommodation hole 10,
adjusting the base of the machining center to enable the plane of the base to be 90 degrees to the horizontal plane, then machining the inlet hole 4,
and adjusting the base of the machining center to enable the plane of the base to be 90 degrees to the horizontal plane, enabling the inlet hole 4 to face downwards, and machining a hole 5.
When the processing is performed in step S4, the processing of the valve stem 12 includes the steps of:
a bar with the same outer diameter as the valve rod 12 is taken, a clamp is used for clamping, the axis of the bar is vertically arranged, redundant materials of the outer ring are cut off from top to bottom, and the valve rod 12 is large in lower end and small in upper end and is integrally formed.
When the processing is performed in step S4, the processing of the cage 3 includes the steps of:
a bar material with the same outer diameter as the valve cage 3 is taken, a clamp is used for clamping, the axis of the bar material is vertically arranged, a middle position hole used for the valve rod 12 to stretch into is formed in the axis of the bar material from top to bottom, an inner cavity used for containing the annular part 6 at the lower end of the valve rod 12 is machined around one end of the middle position hole, the base of the machining center is adjusted, the plane of the base and the horizontal plane are 90 degrees, and a plurality of adjusting holes 8 are machined.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A straight-stroke plastic regulating valve is characterized by comprising:
the valve body (1) is of a closed structure, an inlet and an outlet are respectively arranged on two sides of the valve body, an inlet hole (4) is horizontally arranged from the inlet to the interior of the valve body (1), an outlet hole (5) is horizontally arranged from the outlet to the interior of the valve body (1),
the valve seat (2) is of a hollow annular structure and is vertically arranged, the hollow inner cavity of the valve seat is in the vertical direction and is positioned above the inner end of the inlet hole (4) and at the central position inside the valve body (1),
the valve cage (3) is positioned above the valve seat (2) and consists of a hollow annular piece (6) and a horizontally arranged circular sealing plate, the annular piece (6) is positioned below the sealing plate and positioned above the sealing plate, the axis of the annular piece (6) is superposed with the axis of the valve seat (2), a neutral hole is formed in the center of the sealing plate, the sealing plate seals one side opening of the annular piece (6) to form the valve cage (3), and a plurality of adjusting holes (8) are formed in the outer wall of the annular piece (6),
the upper valve cover (9) is located above the valve cage (3) and is of a hollow annular structure, the axis of the upper valve cover coincides with the axis of the valve seat (2), a containing hole (10) is formed in the lower end face of the upper valve cover from bottom to top along the axis, the containing hole (10) is used for containing the first half section of the valve cage (3), the lower end of the upper valve cover (9) supports against the upper end of the valve body (1) and is matched with the valve body (1) to form a containing cavity (11) taking the valve cage (3) as the center,
valve rod (12), vertical setting, its lower extreme top-down passes behind the inner chamber of upper valve gap (9), the median hole of shrouding, the inner chamber of loop forming element (6) in proper order and stretches into the inner chamber of disk seat (2), wherein, inclined hole (13) have been seted up to the inside of valve body (1), the one end and the cavity (11) intercommunication that holds, the other end and the intercommunication that goes out hole (5) of inclined hole (13), valve rod (12) are used for reciprocating for its lower extreme is adjusted and is stretched into the position that holds cavity (11), adjusts the remaining volume that holds cavity (11) then, makes the fluid medium that gets into from the import loop through valve body (1) inner chamber, loop forming element (6) inner chamber to fluid medium flow through going out the export after inclined hole (13) is adjusted through regulation hole (8) of loop forming element (6).
2. A straight-stroke plastic regulating valve according to claim 1, characterized in that the upper end of the valve rod (12) is connected with an actuator (14), and the actuator (14) is used for driving the valve rod (12) to move up and down, so that the equal cross-sectional area of the positions of the valve rod (12) and the valve seat (2) is changed, and the flow of the fluid medium passing through the valve body (1) is regulated.
3. The straight stroke plastic regulating valve according to claim 2, further comprising a gland (15) having an annular structure, the lower end of which is provided with an external thread,
the upper half section of the inner cavity of the upper valve cover (9) is provided with an internal thread, and the internal thread is matched with the external thread of the gland (15), so that the gland (15) extends into the inner cavity of the upper valve cover (9) from top to bottom and seals the inner cavity of the upper valve cover (9).
4. A straight stroke plastic regulating valve according to claim 3, characterized in that the lower end of the gland (15), the inner cavity of the upper valve cover (9) is further filled with a sealing ring.
5. A straight-stroke plastic regulating valve according to claim 4, characterized in that the upper end and the lower end of the upper valve cover (9) extend outwards to form an upper fixing platform and a lower fixing platform, the upper fixing platform is used for being connected and fixed with the actuator (14) through a bolt, and the lower fixing platform is used for being connected with the bolt and fixedly connected with the valve seat (2).
6. The method for processing the straight-stroke plastic regulating valve according to any one of claims 1 to 5, characterized by comprising the following steps:
step S1: three-dimensional modeling, drawing a model of each accessory of the plastic regulating valve,
step S2: simulation test, using three-dimensional CAD software to test the wall thickness strength, the operating moment, the flow speed, the flow characteristic and the CV value of each designed accessory,
step S3: blanking bar stock, selecting bar stock with diameter larger than that of each accessory,
step S4: the CNC machining center is used for machining,
step S5: and (4) checking the test result,
step S6: assembling and assembling the pneumatic actuator (14), and testing to be qualified,
wherein, when processing in step S4, when processing the upper valve cover (9), the method comprises the following steps:
a bar material with the same diameter as the upper valve cover (9) is taken, a guide hole for a valve rod (12) to pass through is formed along the axis of the bar material after the bar material is clamped by a clamp, the upper half section of a containing hole (10) for containing a valve cage (3) is processed around one end of the guide hole, and then a fixing hole for a gland (15) to stretch into is processed around the other end of the containing hole (10).
7. The method for processing the straight stroke plastic regulating valve according to claim 6, wherein the step of processing the valve body (1) in step S4 comprises the following steps:
taking a bar with the same outer diameter as the valve body (1), clamping by using a clamp to enable the axis of the bar to be horizontally arranged,
a horizontal reference surface is cut on the upper half section of the bar and is used for being matched with the upper valve cover (9),
a lower half section of a containing hole (10) for containing the lower half sections of the valve cage (3), the valve seat (2) and the valve rod (12) is downwards arranged from top to bottom along the central position of the datum plane,
adjusting the base of the machining center to enable the plane of the base to be 30 degrees with the horizontal plane, then machining an inclined hole (13) through the accommodating hole (10),
adjusting a base of the machining center to enable the plane of the base to be 90 degrees to the horizontal plane, then machining an inlet hole (4),
and adjusting the base of the machining center to enable the plane of the base to be 90 degrees to the horizontal plane, enabling the inlet hole (4) to face downwards, and machining a hole (5).
8. The method for processing the straight stroke plastic regulating valve according to claim 7, wherein the step of processing the valve stem (12) in step S4 comprises the steps of:
a bar with the same outer diameter as the valve rod (12) is taken, a clamp is used for clamping, the axis of the bar is vertically arranged, redundant materials of the outer ring are cut off from top to bottom, and the valve rod (12) is large in lower end and small in upper end and is integrally formed.
9. The method for processing the straight stroke plastic regulating valve according to claim 8, wherein the processing of the cage (3) in the step S4 comprises the following steps:
get the rod the same with valve cage (3) external diameter, utilize anchor clamps to press from both sides tightly for the vertical setting of axis of rod, top-down sets up the neutral position hole that is used for valve rod (12) to stretch into along its axis, and the inner chamber that is used for holding annular member (6) of valve rod (12) lower extreme around this neutral position hole one end processing, the base of adjustment machining center makes the plane of base and horizontal plane be 90 degrees, processes a plurality of regulation holes (8).
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| CN205101569U (en) * | 2015-10-16 | 2016-03-23 | 浙江科海仪表有限公司 | But quick change disk seat formula long -life single seat governing valve |
| DE102015011551B3 (en) * | 2015-09-02 | 2017-03-02 | Samson Aktiengesellschaft | Control valve for controlling a fluid flow of a process plant |
| CN214274495U (en) * | 2020-12-30 | 2021-09-24 | 苏州可邦自控阀业有限公司 | High-strength pneumatic regulating valve |
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- 2022-01-18 CN CN202210055407.9A patent/CN114483966B/en active Active
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|---|---|---|---|---|
| DE102015011551B3 (en) * | 2015-09-02 | 2017-03-02 | Samson Aktiengesellschaft | Control valve for controlling a fluid flow of a process plant |
| CN205101569U (en) * | 2015-10-16 | 2016-03-23 | 浙江科海仪表有限公司 | But quick change disk seat formula long -life single seat governing valve |
| CN214274495U (en) * | 2020-12-30 | 2021-09-24 | 苏州可邦自控阀业有限公司 | High-strength pneumatic regulating valve |
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