CN115614480A - Plunger type multistage pressure-reducing noise-reducing valve core and single-seat control valve - Google Patents
Plunger type multistage pressure-reducing noise-reducing valve core and single-seat control valve Download PDFInfo
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- CN115614480A CN115614480A CN202211157246.0A CN202211157246A CN115614480A CN 115614480 A CN115614480 A CN 115614480A CN 202211157246 A CN202211157246 A CN 202211157246A CN 115614480 A CN115614480 A CN 115614480A
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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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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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
- F16K1/54—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
Abstract
The invention discloses a plunger type multistage pressure reduction and noise reduction valve core, which comprises a valve core body, wherein the valve core body is provided with an inlet flow passage and an outlet flow passage, and fluid enters the valve core body from the inlet flow passage and then flows out from the outlet flow passage; the valve core body is internally and sequentially provided with a plurality of pressure reducing runners which are communicated with each other along the axial direction of the valve core body, and the two pressure reducing runners at the two ends are respectively communicated with the inlet runner and the outlet runner. According to the invention, the plurality of pressure reducing flow passages are sequentially arranged in the axial direction of the valve core body, so that the axial space of the valve core body is fully utilized, the pressure reducing flow passages can be arranged in the limited space as many as possible, the structure is compact, and the pressure reducing and noise reducing effects are good.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a plunger type multistage pressure-reducing and noise-reducing valve core and a single-seat control valve.
Background
In the field of control valves, due to the diverse requirements of the technological process, the fluid working condition parameters also present diverse requirements. Control valves for controlling these media parameters are required to be developed in different types of structures in order to meet customer requirements in terms of adjustment accuracy, sealing, reliability, life, noise, vibration, maintenance, and the like. Under the working condition of high pressure difference, because the flow velocity passing through the control valve is extremely high, the fluid at the throttling port can seriously scour and abrade the internal parts of the control valve, the service life of the internal parts is shortened, and simultaneously, large noise and vibration are generated. Multi-stage pressure reducing and noise reducing control valves are used to solve these problems.
The existing multistage pressure reduction control valve mainly depends on a plurality of layers of valve cages which are coaxially sleeved to realize pressure reduction and noise reduction, and the structure is not compact enough, and the pressure reduction stage number is not high.
Disclosure of Invention
Aiming at the problems in the background art, the invention aims to provide a plunger type multistage pressure reduction and noise reduction valve core, which comprises a valve core body, a plunger type multistage pressure reduction and noise reduction valve core and a plunger type multistage pressure reduction and noise reduction valve core, wherein the plunger type multistage pressure reduction and noise reduction valve core comprises an inlet flow channel and an outlet flow channel, and fluid flows out of the outlet flow channel after entering the valve core body from the inlet flow channel;
the valve core body is internally and sequentially provided with a plurality of pressure reducing runners which are mutually communicated along the axial direction of the valve core body, and the two pressure reducing runners positioned at the two ends are respectively communicated with the inlet runner and the outlet runner.
Preferably, at least one of the depressurization flow passages is a zigzag flow passage, and the zigzag flow passage extends along the axial direction of the valve core body.
Preferably, the inlet flow passage is a cylindrical cavity, and a first end opening of the cylindrical cavity is communicated with the outside;
the number of the pressure reduction flow passages is three, and the three pressure reduction flow passages are respectively a first annular buffer cavity, the zigzag flow passage and a second annular buffer cavity;
the first annular buffer cavity is positioned on the outer side of the circumference of the second end of the cylindrical cavity, and a plurality of first pressure reducing holes communicated with the first annular buffer cavity and the cylindrical cavity are formed in the cavity wall between the first annular buffer cavity and the cylindrical cavity;
the second annular buffer cavity is located on the outer side of the circumference of the first end of the cylindrical cavity, a plurality of second pressure reducing holes communicated with the outside are formed in the cavity wall of one side, away from the cylindrical cavity, of the second annular buffer cavity, and the second pressure reducing holes are the outlet flow channel.
The zigzag flow channel is an annular cavity, and the zigzag flow channel is arranged between the first annular buffer cavity and the second annular buffer cavity and communicated with the first annular buffer cavity and the second annular buffer cavity.
Preferably, the first pressure relief vent and the second pressure relief vent are both waist-shaped vents.
Preferably, a plurality of the first pressure reduction holes and a plurality of the second pressure reduction holes are distributed in a circumferential diamond shape.
Preferably, the bending angle between adjacent sawteeth of the zigzag flow channel is 90 degrees.
Preferably, the zigzag flow passage is provided with seven bends.
Based on the same conception, the invention also provides a single-seat control valve, which comprises the plunger type multistage pressure reduction and noise reduction valve core and a valve body, wherein a first channel is arranged at one end in the valve body, a second channel is arranged at the other end in the valve body, and the first channel is communicated with the second channel;
the plunger type multistage pressure and noise reduction valve core is arranged at the joint of the first channel and the second channel in a penetrating way, and the fluid flows into the valve body from the first channel and flows out from the second channel after passing through the plunger type multistage pressure and noise reduction valve core;
one end of the plunger type multistage pressure reduction and noise reduction valve core is connected with the valve body in a sliding and sealing mode, the other end of the plunger type multistage pressure reduction and noise reduction valve core is connected with the connection position of the first channel and the second channel in a sliding and sealing mode, and a first end opening of the cylindrical cavity faces the first channel and is communicated with the first channel;
and the plunger type multistage pressure reduction and noise reduction valve core is slid to enable the second pressure reduction holes to be communicated with or disconnected from the second channel.
Preferably, the second channel is located above the first channel, and further includes:
the valve end cover is arranged at the upper end of the valve body and is positioned above the second channel;
the guide sleeve is arranged on the valve end cover, and the upper end of the plunger type multistage pressure-reducing and noise-reducing valve core is connected with the guide sleeve in a sliding and sealing manner;
the valve rod penetrates through and is slidably connected with the valve end cover, and the lower end of the valve rod is fixedly connected with the plunger type multistage pressure reduction and noise reduction valve core;
and the valve seat is arranged at the joint of the first channel and the second channel, and the lower end of the plunger type multistage pressure-reducing and noise-reducing valve core is connected to the valve seat in a sliding and sealing manner.
Preferably, the valve seat is threadedly connected to the valve body.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1. according to the invention, the plurality of pressure reducing flow channels are sequentially arranged in the axial direction of the valve core body, so that the axial space of the valve core body is fully utilized, the pressure reducing flow channels can be arranged in the limited space as many as possible, the structure is compact, and the pressure reducing and noise reducing effects are good.
2. At least one pressure reducing flow passage is a zigzag flow passage, the zigzag flow passage is provided with bends, fluid sequentially impacts flow passage walls at each bend after entering the zigzag flow passage to realize pressure reduction and noise reduction, the zigzag flow passage can be conveniently arranged along the axial direction of the valve core body, the axial space of the valve core body can be fully utilized, and the length of the zigzag flow passage can be flexibly adjusted according to design requirements.
3. The invention is also provided with a first annular buffer cavity and a second annular buffer cavity, and fluid enters the first annular buffer cavity along the radial direction of the valve core body after entering the cylindrical cavity, enters the rear impact cavity wall, so that the first pressure reduction and noise reduction are realized. Then the fluid enters the zigzag flow passage to realize the second pressure reduction and noise reduction. And finally, the fluid enters the second annular buffer cavity to impact the cavity wall again and then flows out through the second pressure reducing hole along the radial direction of the valve core body, so that the third pressure reduction and noise reduction are realized. That is to say through setting up cylinder chamber, first annular cushion chamber and second annular cushion chamber and having realized that the radial step-down of case body falls and make an uproar, combine the axial of zigzag runner to fall and make an uproar for the case body all has the runner of falling the noise of falling step-down in axial and footpath, makes the runner of falling the noise of falling step-down longer in limited space, and the structure is compacter and the effect of falling the noise of falling step-down is better.
4. The first pressure reducing hole and the second pressure reducing hole are both waist-shaped holes, and the waist-shaped holes have the advantages that noise reduction is kept, meanwhile, the flow areas of any unit length in the stroke direction can be kept equal, and the accuracy of adjusting characteristics is improved.
Drawings
Embodiments of the invention will be described in further detail below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a prior art control valve in a closed state;
FIG. 2 is a schematic diagram of a prior art control valve regulation;
FIG. 3 is a schematic view of a plunger-type multistage pressure-reducing and noise-reducing valve core according to the present invention;
FIG. 4 is a schematic view of the arrangement of the first pressure relief vent of the present invention;
FIG. 5 is a schematic view of a second arrangement of pressure relief vents in accordance with the present invention;
FIG. 6 is a schematic view of the closed state of the single seat control valve of the present invention;
FIG. 7 is a schematic view of the single seat control valve of the present invention in an adjusted state;
fig. 8 is an enlarged view of a portion of fig. 7 according to the present invention.
Description of reference numerals:
01: a valve body; 02: a first channel; 03: a second channel; 04: a valve core; 05: a valve end cap; 06: a guide sleeve; 07: a valve stem; 08: a valve seat; 09: a first cage; 010: a second cage; 1: a valve body; 2: a first channel; 3: a second channel; 4: a plunger type multistage pressure reduction and noise reduction valve core; 5: a valve end cap; 6: a guide sleeve; 7: a valve stem; 8: a valve seat; 9: a valve core body; 10: a zigzag flow passage; 11: a cylindrical cavity; 12: a first annular buffer chamber; 13: a second annular buffer chamber; 14: a first pressure relief vent; 15: a second pressure relief vent.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are each provided with a non-precise ratio for the purpose of facilitating and clearly facilitating the description of the embodiments of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
Fig. 1 to 2 show a control valve according to the related art, which includes a valve body 01, a first passage 02, a second passage 03, a valve element 04, a valve end cap 05, a guide sleeve 06, a valve stem 07, a valve seat 08, a plurality of first valve cages 09, and a second valve cage 010.
Fluid enters from a first channel 02 on the left side of the valve body 01, then enters into the second valve cage 010, enters into inner cavities of the first valve cages 09 through circular holes of the second valve cage 010, then sequentially flows into the second channel 03 through the circular holes in the walls of the first valve cages 09, and finally flows out from the right side of the valve body 011 through the second channel 03. When the fluid flows out of the round holes of the first valve cages 09 in sequence, due to the fact that the round holes of the adjacent first valve cages 09 are arranged in a staggered mode, the fluid can impact the cage wall of the next first valve cage 09, and the next first valve cage 09 is enabled to turn 90 degrees.
When fluid flows through a plurality of first valve cages 09, the fluid is dispersed into a plurality of flow beams, so that the flow beams can impact the cage walls or impact each other to change the flow direction and consume the kinetic energy of the fluid, the flow speed is reduced, the purpose of reducing pressure and noise is achieved, and the more the number of the first valve cages 09, the more the pressure and noise reduction effect is obvious.
However, the existing control valve structure has the following disadvantages:
1. the pressure reduction and noise reduction of a plurality of first valve cages 09 are mainly depended on, the structure quantity is more and complex, the manufacturing cost is higher, the valve inner structure is provided with a plurality of parts for combination, the processing and assembling precision requirements are met, the manufacturing cost is high, the overhauling and maintenance difficulty is high, and the pressure reduction effect is limited due to the limitation of the valve cavity space.
In addition, the axial (height) machining precision of the first valve cage 09 can affect the positioning of the valve end cover 05 and the valve seat 08 during installation, so that the compression amount of sealing gaskets between the valve end cover 05 and the valve body 01 and between the valve seat 08 and the valve body 01 is affected, and the risks of inner leakage and outer leakage are caused.
2. The number of the first cage 09 is limited by the structure and the space of the valve cavity, the pressure reduction stage number (1 stage for every 1 90-degree turn of the fluid) is usually below 4 stages, and the allowable pressure difference of the control valve is not too large.
3. The second valve cage 010 of the flow regulating part of the valve core 04 is a rhombic circular hole, and due to the inherent characteristics of the circular holes and the distribution limitation of the circular holes, the flow area is generally linear in the regulating stroke range of the valve core 04, but the change of the flow area in unit stroke has fluctuation, the linearity is discontinuous, and the accuracy of the flow characteristic is relatively low.
Example 1
Referring to fig. 3 to 5, the core of the present invention is to provide a plunger type multistage pressure and noise reduction valve core, which includes a valve core body 9 having an inlet channel and an outlet channel, and fluid enters the valve core body 9 from the inlet channel and then flows out from the outlet channel.
A plurality of pressure reducing runners which are communicated with each other are sequentially arranged in the valve core body 9 along the axial direction of the valve core body, and the two pressure reducing runners at the two ends are respectively communicated with the inlet runner and the outlet runner.
And at least one pressure reduction flow passage is a saw-tooth flow passage 10, and the saw-tooth flow passage 10 extends along the axial direction of the valve core body 9. In this embodiment, the bending angle between adjacent sawteeth of the zigzag flow channel 10 is 90 degrees, and the zigzag flow channel 10 is provided with seven bends. Of course, in other embodiments, the number of bending angles and the number of bending angles of the zigzag flow channel 10 can be other numbers, and are not limited herein. The number of the bends can be calculated according to the pressure difference borne by the control valve, the number of the bends can be more or less, the width of the bend section is determined according to the fluid flow calculation, and the design purpose of the tooth shape of the zigzag flow channel 10 is to increase the number of the bends in the most possible utilization space so as to enhance the pressure reduction effect.
Through set up a plurality of step-down runners in proper order in the axial of case body 9, make full use of the axial space of case body 9 for can arrange as much as possible step-down runners in limited space, compact structure and step-down noise reduction effect are good.
The zigzag flow passage 10 is provided with bends, fluid sequentially impacts flow passage walls at the bending positions after entering the zigzag flow passage 10 to achieve pressure reduction and noise reduction, the zigzag flow passage 10 can be conveniently arranged along the axial direction of the valve core body 9, the axial space of the valve core body 9 can be fully utilized, and the length of the zigzag flow passage 10 can be flexibly adjusted according to design requirements.
Specifically, the inlet channel is a cylindrical cavity 11 and is arranged at the center of the valve core body 9, and a first end opening of the cylindrical cavity 11 is communicated with the outside.
The number of the pressure reduction flow passages is three, the three pressure reduction flow passages are respectively a first annular buffer cavity 12, a sawtooth-shaped flow passage 10 and a second annular buffer cavity 13, and the sawtooth-shaped flow passage 10 is also an annular cavity.
The first annular buffer cavity 12 is located on the outer side of the circumference of the second end of the cylindrical cavity 11, and a plurality of first pressure reducing holes 14 communicated with the first annular buffer cavity 12 and the cylindrical cavity 11 are formed in the cavity wall between the first annular buffer cavity 12 and the cylindrical cavity 11.
The second annular buffer cavity 13 is located on the outer side of the circumference of the first end of the cylindrical cavity 11, a plurality of second pressure reducing holes 15 communicated with the outside are formed in the cavity wall of one side, far away from the cylindrical cavity 11, of the second annular buffer cavity 13, and the plurality of second pressure reducing holes 15 are outlet flow channels.
The zigzag flow passage 10 is located on the outer side of the circumference of the cylindrical cavity 11 and between the first annular buffer cavity 12 and the second annular buffer cavity 13, and the zigzag flow passage 10 communicates the first annular buffer cavity 12 and the second annular buffer cavity 13.
Fluid enters the cylindrical cavity 11 from the opening at the first end of the cylindrical cavity 11, flows to the second end of the cylindrical cavity 11 after entering the cylindrical cavity 11, then flows through the first pressure reducing holes 14 along the radial direction of the valve core body 9 after being turned for the first time, the fluid enters the first annular buffer cavity 12 and impacts the cavity wall of the first annular buffer cavity 12 after being divided into a plurality of flow beams by the first pressure reducing holes 14, the fluid flows downwards along the axial direction of the valve core body 9 after impacting the cavity wall of the first annular buffer cavity 12 after being turned for the second time for 90 degrees, and meanwhile, the flow beams collide with each other to consume kinetic energy additionally, so that the first pressure reduction and noise reduction are realized.
Then the fluid enters the zigzag flow passage 10, and when the fluid passes through seven bends of the zigzag flow passage 10, the fluid impacts the flow passage wall for seven times and makes 7 times of 90-degree turns, so that the second pressure reduction and noise reduction are realized.
Finally, the fluid enters the second annular buffer cavity 13 and collides the cavity wall again to turn 90 degrees, and then flows out through the second pressure reducing hole 15 along the radial direction of the valve core body 9, so that the third pressure reduction and noise reduction are realized. The fluid passes through 10 hits and 90 degree turns effectively reducing the pressure while reducing noise.
That is to say, through setting up cylinder chamber 11, first annular cushion chamber 12 and second annular cushion chamber 13 and having realized that the radial step-down of case body 9 is fallen and make an uproar, combine the axial step-down of zigzag runner 10 to fall and make an uproar for case body 9 all has the runner that falls that steps down in axial and footpath, makes the runner that falls that steps down longer in limited space, and the structure is compacter and the effect that falls that steps down and makes an uproar is better.
Referring to fig. 4 and 5, the first pressure-reducing holes 14 and the second pressure-reducing holes 15 are all kidney-shaped holes, and a plurality of the first pressure-reducing holes 14 and a plurality of the second pressure-reducing holes 15 are all distributed in a circumferential diamond shape. The kidney-shaped hole has the advantages that the noise is reduced, the flow area of any unit length in the stroke direction can be kept equal, and the precision of the adjusting characteristic is improved. And the number of first pressure relief vents 14 and second pressure relief vents is calculated based on the desired flow rate.
The flow regulating stroke of the plunger type multistage pressure reduction and noise reduction valve core 4 can be adjusted by adjusting the heights X of the plurality of second pressure reduction holes 15.
Example 2
Referring to fig. 6 to 8, the present invention further provides a single-seat control valve, including the plunger type multistage pressure-reducing and noise-reducing valve core 4 of embodiment 1, and further including a valve body 1, wherein one end of the valve body 1 is provided with a first channel 2, the other end is provided with a second channel 3, the first channel 2 and the second channel 3 are communicated with each other, and the second channel 3 is located above the first channel 2.
The plunger type multistage pressure reduction and noise reduction valve core 4 is arranged at the joint of the first channel 2 and the second channel 3 in a penetrating mode, fluid flows into the valve body 1 from the first channel 2, passes through the plunger type multistage pressure reduction and noise reduction valve core 4 and then flows out from the second channel 3.
One end of the plunger type multistage pressure reduction and noise reduction valve core 4 is connected with the valve body 1 in a sliding and sealing manner, the other end of the plunger type multistage pressure reduction and noise reduction valve core is connected with the joint of the first channel 2 and the second channel 3 in a sliding and sealing manner, and a first end opening of the cylindrical cavity 11 faces the first channel 2 and is communicated with the same;
and a plurality of second pressure reducing holes 15 are communicated with or disconnected from the second channel 3 by sliding the plunger type multistage pressure reducing and noise reducing valve core 4.
Specifically, the valve comprises a valve end cover 5, a guide sleeve 6, a valve rod 7 and a valve seat 8. The valve end cover 5 is arranged at the upper end of the valve body 1 and is positioned above the second channel 3, and the valve end cover 5 is connected with the valve body 1 in a sealing mode. The guide sleeve 6 is arranged on the valve end cover 5, and the upper end of the plunger type multistage pressure-reducing and noise-reducing valve core 4 is connected with the guide sleeve 6 in a sliding and sealing manner. The valve rod 7 penetrates through and is connected with the valve end cover 5 in a sliding and sealing mode, and the lower end of the valve rod is fixedly connected with the plunger type multistage pressure reduction and noise reduction valve core 4. The valve seat 8 is arranged at the joint of the first channel 2 and the second channel 3 and is connected with the valve body 1 in a sealing way. The lower end of the plunger type multistage pressure reduction and noise reduction valve core 4 is connected with a valve seat 8 in a sliding and sealing mode. And valve seat 8 threaded connection is in valve body 1 for it is more convenient to install.
The definition of a single seat valve is that only one sealing point is needed in the closed state of the valve, and referring to fig. 6, the sealing point is the sliding sealing connection part of the valve core and the valve seat 8, and other sealing points are not needed.
The fluid enters through the first channel 2, is subjected to pressure reduction and noise reduction through the plunger type multistage pressure reduction and noise reduction valve core 4, and then flows out of the second channel 3.
Referring to fig. 6, in the closed state, the second pressure relief vent 15 is in sealing engagement with the valve seat 8, and fluid cannot flow through the second pressure relief vent 15 to the second passage 3.
Referring to fig. 7 and 8, when the flow rate needs to be adjusted, the valve rod 7 is driven by the actuating component to drive the valve core to move upwards, the second pressure reducing hole 15 is communicated with the second channel 3, and the fluid enters the second channel 3 through the second pressure reducing hole 15. The flow rate is adjusted by adjusting the amount of movement of the valve element to adjust the amount of communication between the second relief hole 15 and the second passage 3.
The invention provides a plunger type multistage pressure reduction and noise reduction valve core and a single-seat control valve aiming at the existing control valve. The unique axial entity space of the valve core is utilized, the novel axial pressure reducing and noise reducing flow channel design is adopted, the flow regulation and the multi-stage pressure reducing and noise reducing functions are realized through a single part of the valve core, the manufacturing and maintenance cost of the control valve is greatly reduced, the production efficiency is improved, the pressure reducing and noise reducing effects of the control valve are greatly improved, and the reliability and the service life of a product are improved.
According to the invention, by canceling the design of the valve cage, the risk of external leakage or internal leakage of the control valve is effectively reduced, the adjusting function of the valve core is maintained, the linear adjusting characteristic precision of the control valve is improved, the manufacturing cost is reduced, the assembly is simple and convenient, the maintenance is convenient, and the cost is low.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (10)
1. A plunger type multistage pressure reduction and noise reduction valve core is characterized by comprising a valve core body, a plunger type multistage pressure reduction and noise reduction valve core and a plunger type multistage pressure reduction and noise reduction valve core, wherein the plunger type multistage pressure reduction and noise reduction valve core comprises an inlet flow passage and an outlet flow passage, and fluid flows out of the outlet flow passage after entering the valve core body from the inlet flow passage;
the valve core body is internally and sequentially provided with a plurality of pressure reducing runners which are communicated with each other along the axial direction of the valve core body, and the two pressure reducing runners at the two ends are respectively communicated with the inlet runner and the outlet runner.
2. The plunger type multistage pressure reducing and noise reducing valve core according to claim 1, wherein at least one of the pressure reducing flow passages is a zigzag flow passage provided along an axial extension of the valve core body.
3. The plunger type multistage pressure and noise reduction valve core according to claim 2, wherein the inlet flow passage is a cylindrical cavity, and a first end opening of the cylindrical cavity is communicated with the outside;
the number of the pressure reduction flow passages is three, and the three pressure reduction flow passages are respectively a first annular buffer cavity, the zigzag flow passage and a second annular buffer cavity;
the first annular buffer cavity is positioned on the outer side of the circumference of the second end of the cylindrical cavity, and a plurality of first pressure reducing holes communicated with the first annular buffer cavity and the cylindrical cavity are formed in the cavity wall between the first annular buffer cavity and the cylindrical cavity;
the second annular buffer cavity is positioned on the outer side of the circumference of the first end of the cylindrical cavity, a plurality of second pressure reducing holes communicated with the outside are formed in the cavity wall of one side, away from the cylindrical cavity, of the second annular buffer cavity, and the second pressure reducing holes are the outlet flow channel;
the zigzag flow channel is an annular cavity, and the zigzag flow channel is arranged between the first annular buffer cavity and the second annular buffer cavity and communicated with the first annular buffer cavity and the second annular buffer cavity.
4. A plunger type multistage pressure reducing and noise reducing valve cartridge as defined in claim 3, wherein the first pressure reducing orifice and the second pressure reducing orifice are both kidney shaped orifices.
5. The plunger type multi-stage pressure reducing and noise reducing valve cartridge of claim 3, wherein a plurality of said first pressure reducing orifices and a plurality of said second pressure reducing orifices are circumferentially diamond-shaped.
6. The plunger type multistage pressure reducing and noise reducing valve core according to claim 2, wherein the bending angle between adjacent saw teeth of the saw-tooth flow passage is 90 degrees.
7. The plunger type multistage pressure reducing and noise reducing valve core according to claim 2, wherein the zigzag flow passage is provided with seven bends.
8. A single-seat control valve, which is characterized by comprising the plunger type multistage pressure reduction and noise reduction valve core as set forth in any one of claims 3 to 5, and further comprising a valve body, wherein one end in the valve body is provided with a first channel, the other end is provided with a second channel, and the first channel and the second channel are communicated with each other;
the plunger type multistage pressure and noise reduction valve core is arranged at the joint of the first channel and the second channel in a penetrating way, and the fluid flows into the valve body from the first channel and flows out from the second channel after passing through the plunger type multistage pressure and noise reduction valve core;
one end of the plunger type multistage pressure reduction and noise reduction valve core is connected with the valve body in a sliding and sealing mode, the other end of the plunger type multistage pressure reduction and noise reduction valve core is connected with the connection position of the first channel and the second channel in a sliding and sealing mode, and a first end opening of the cylindrical cavity faces the first channel and is communicated with the first channel;
and a plurality of second pressure reducing holes are communicated or disconnected with the second channel by sliding the plunger type multistage pressure reducing and noise reducing valve core.
9. The single seat control valve of claim 8, wherein the second passage is located above the first passage, further comprising:
the valve end cover is arranged at the upper end of the valve body and is positioned above the second channel;
the guide sleeve is arranged on the valve end cover, and the upper end of the plunger type multistage pressure-reducing and noise-reducing valve core is connected with the guide sleeve in a sliding and sealing manner;
the valve rod penetrates through and is slidably connected with the valve end cover, and the lower end of the valve rod is fixedly connected with the plunger type multistage pressure reduction and noise reduction valve core;
and the valve seat is arranged at the joint of the first channel and the second channel, and the lower end of the plunger type multistage pressure-reducing and noise-reducing valve core is connected to the valve seat in a sliding and sealing manner.
10. The single seat control valve of claim 9, wherein the valve seat is threadably attached to the valve body.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116045070A (en) * | 2023-03-31 | 2023-05-02 | 艾坦姆流体控制技术(山东)有限公司 | Ball cage type noise reduction regulating valve |
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|---|---|
| CN115614480B (en) | 2023-09-19 |
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