CN116717618B - Flow resistance and pressure drop adjustable top-mounted axial flow check valve - Google Patents
Flow resistance and pressure drop adjustable top-mounted axial flow check valve Download PDFInfo
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- CN116717618B CN116717618B CN202310863393.8A CN202310863393A CN116717618B CN 116717618 B CN116717618 B CN 116717618B CN 202310863393 A CN202310863393 A CN 202310863393A CN 116717618 B CN116717618 B CN 116717618B
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- 239000000945 filler Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 230000001815 facial effect Effects 0.000 claims 1
- 239000003381 stabilizer Substances 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 20
- 238000000034 method Methods 0.000 description 10
- 239000003345 natural gas Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
- F16K15/065—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring spring pulling the closure member against the seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted 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
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Check Valves (AREA)
Abstract
The invention discloses an upper-mounted axial flow check valve with adjustable flow resistance and pressure drop, which comprises a valve body, wherein a valve seat is arranged on the valve body, the relative position of a guide seat is regulated by an external manual gear and a rack executing device to limit the travel opening and the flow area of a valve clack, the adjustment of the flow resistance, the pressure drop and the flow characteristics of the valve is realized, a valve rod is enabled to ascend and descend under the action of a valve rod nut thread by rotating a hand wheel, a rack on the valve rod drives a gear to rotate, and the gear drives a guide sleeve rack to move along the axial direction of a medium. When the end face of the guide sleeve is flush with the end face of the guide seat, the valve clack is limited by the end face of the guide sleeve, namely, the flow resistance and the pressure drop of the valve are increased, and the flow coefficient is reduced. When the valve flow resistance and the flow characteristic are required to be adjusted in the use condition, the opening of the valve clack is controlled through rotation of the hand wheel, and the adjustment of the medium flow is realized. The invention adopts the upper-mounting type on-line maintenance structure, and can assemble and take out the parts through the middle cavity flange manhole, thereby realizing the on-line maintenance of the valve.
Description
Technical Field
The invention relates to an adjustable flow resistance pressure drop upper-mounted axial flow check valve.
Background
Natural gas is one of the widely accepted and used clean energy sources today, with the further improvement of the international requirements for environmental protection, a series of coping policies such as carbon peak and carbon-neutralized two-carbon strategy are formulated in each country, so that the natural gas is further promoted to be an energy supply mode of the current mainstream, the demand of the natural gas is maintained to be more rapid, and the demand of the natural gas is maintained to be 10% increased every year according to the prediction of energy organization in the next ten years. At present, natural gas in China mainly enters the sea through a land pipeline, namely, the natural gas enters Russian and China sub-imported natural gas through a land pipeline, and the natural gas enters the sea through a marine ship in an LNG mode, wherein the demand of the LNG is continuously increased for a long time.
The axial flow check valve is used as a key valve of the LNG pipeline, plays an important role in preventing medium from flowing back and avoiding the influence of water hammer; the adjustable flow resistance upper-mounted axial flow check valve has the dual functions of flow resistance, pressure drop and flow characteristic adjustment, and can control flow and valve back pressure by adjusting the opening of the valve clack, so that the pressure difference between the front end and the rear end of the valve reaches an equilibrium state, stable production of a gas well is realized, and the adjustable flow resistance upper-mounted axial flow check valve is a key valve in a natural gas exploitation process.
However, the existing check valve has some defects in the use process, and needs to be improved, and the structural limitation of the traditional axial flow check valve ensures that the flow resistance and the flow characteristic of the valve are fixed, so that the use of the valve cannot meet the pressure fluctuation working condition environment. The traditional axial flow check valve adopts a step-by-step sleeve mounting structure, the valve can only be replaced in a whole machine due to leakage and other problems, on-line maintenance can not be realized, the maintenance period and cost in the petrochemical field are increased, the performance requirements of the current severe working conditions such as petrochemical, natural gas, long-distance pipelines and the like on the axial flow check valve are higher and higher, and the problems are solved; we therefore propose an adjustable flow resistance pressure drop top-loading axial flow check valve.
Disclosure of Invention
The invention provides an upper-mounted axial flow check valve with adjustable flow resistance and pressure drop, which comprises a valve body, wherein a valve seat is arranged on the valve body, a valve clack is arranged in the center of the valve body, a valve rod is transversely arranged in the valve clack, a guide sleeve is sleeved on the outer surface of the valve rod, a spring is sleeved on the outer surface of the guide sleeve, the guide sleeve is arranged on a guide seat, a gear seat is arranged on the outer surface of the center of the guide sleeve, a gear is arranged on the side edge of the gear seat, the gear is connected with a rack through gear meshing, a toothed bar is arranged above the rack, the toothed bar penetrates through a valve cover, a filler is arranged at the joint of the valve cover and the toothed bar, a limiting block is arranged above the filler, the limiting block is fixed on a support, and the limiting block is driven by an external manual gear to move so as to adjust the relative position of the guide seat to limit the stroke opening and the flow resistance of the valve clack.
By adopting the structure, the valve rod ascends and descends under the action of the screw thread of the valve rod nut, the rack on the valve rod drives the gear to rotate, and the gear drives the guide sleeve rack to move along the axis direction of the medium. When the end face of the guide sleeve is flush with the end face of the guide seat, the valve clack achieves the maximum opening under the action of the medium, namely, the flow resistance and the pressure drop of the valve are minimum, and the flow coefficient is maximum. When the end face of the guide sleeve moves higher than the end face of the guide seat, the valve clack is opened under the action of the medium and limited by the end face of the guide sleeve, namely, the flow resistance and the pressure drop of the valve are increased, and the flow coefficient is reduced. When the valve flow resistance and the flow characteristic are required to be adjusted in the use condition, the opening of the valve clack is controlled through rotation of the hand wheel, and the flow resistance and the pressure drop characteristic of the valve can be positioned and controlled in the flow characteristic percentage of the bracket mark, so that the medium flow is regulated. The adjustable flow resistance and pressure drop upper-mounted axial flow check valve adopts an upper-mounted on-line maintenance structure, namely, main parts of the valve: the valve clack, the valve seat, the guide sleeve, the valve rod and other parts can be assembled and taken out through the middle cavity flange manhole, so that the valve can be maintained on line.
As the preferable technical scheme of the invention, the guide seat, the guide sleeve, the gear, the positioning nut, the spring and the valve clack are assembled into a whole, the guide sleeve is retracted into the storage cavity of the guide seat, the spring is in a free stretching state, the plane of the valve clack is attached to the end face of the guide seat, the combined total structural length of the guide seat of the valve clack is smaller than the length of the long shaft of the flange in the valve body, the valve clack and the guide seat are assembled into the valve body through the middle flange, and four uniformly distributed positioning groove faces are arranged on the outer circle of the guide seat.
As the preferable technical scheme of the invention, the end face of the valve clack is fully opened and retreated to the end face of the guide seat, the total length of the valve clack and the guide seat is smaller than the long axis size of the middle flange, and the valve clack and the guide seat assembly are taken out through the middle flange; the valve seat is in threaded connection with the valve body, and the valve seat is taken down through a process groove of the rotary valve seat and taken out by the middle flange.
As the preferable technical scheme of the invention, the valve cover, the valve rod and the rack part are inserted into the gear hole of the guide seat, the valve cover positioning support leg presses the guide sleeve, the three shafts of the guide seat X, Y, Z are respectively positioned, and the hand wheel is rotated to enable the valve rod rack, the gear and the guide sleeve rack to relatively move to the spring pre-tightening position scale.
By adopting the structure, the valve seat and the sealing gasket are placed in the middle flange during valve assembly, and the valve body is screwed in through the process groove on the valve seat. The guide seat, the guide sleeve, the gear, the positioning nut, the spring and the valve clack are assembled into a whole, at the moment, the guide sleeve is retracted into the storage cavity of the guide seat, the spring is in a free stretching state, the plane of the valve clack is attached to the end face of the guide seat, the total structural length of the valve clack guide seat assembly is smaller than the length of the long shaft of the flange in the valve body, the assembly can be assembled into the valve body through the middle flange, and when the valve body is assembled into the assembly, the assembly is relatively matched with and limited by three positioning support legs of the valve body. The valve cover, the valve rod and the rack assembly are inserted into the gear hole of the guide seat, at the moment, the valve cover positioning support leg presses the guide sleeve, the three shafts of the guide seat X, Y, Z are respectively positioned, the hand wheel is rotated to enable the valve rod rack, the gear and the guide sleeve rack to relatively move to the spring pre-tightening position scales, and at the moment, the valve realizes normal opening and closing and non-return functions.
As the preferable technical scheme of the invention, a storage cavity is arranged between the guide sleeve and the gear seat, and a gear fixing frame is fixed on the gear seat.
As a preferable technical scheme of the invention, a valve body inflow end is arranged on the left side of the valve body, and a valve body outflow end is arranged on the right side of the valve body.
As the preferable technical scheme of the invention, the valve body inlet end to the valve body outlet end adopt a taper pipe flow passage structure with gradually-enlarged taper pipe flow passage with variable opening degrees from left inlet to right outlet.
By adopting the structure, the left inlet and right outlet variable opening Venturi type flow passage is adopted from the inlet end of the valve body to the outlet end of the valve body, and the tapered pipe flow passage structure is gradually enlarged, so that vortex is not generated when the flow speed of fluid is changed, boundary layer separation is avoided, and the fluid pressure recovery capacity of the outlet end of the valve is improved. The adjustable flow resistance and pressure drop upper-mounted axial flow check valve has the function of preventing water hammer, and as the valve clack is closed, the side pressure of the valve outlet is continuously increased, the side pressure of the valve inlet is continuously reduced, and the pressure increase, namely the water hammer phenomenon, in the pipeline is avoided. The valve clack is closed instantly, the pressure change at the outlet side of the valve is uniform, no local pressure rapid increase phenomenon is generated, and the water impact influence of the valve clack when closing is weakened
As the preferable technical scheme of the invention, a flow resistance characteristic opening indicator is arranged above the valve cover, a hand wheel is fixedly connected above the bracket through a valve rod nut, the hand wheel is connected with the toothed bar, and a gasket is arranged at the joint of the valve body and the valve seat.
By adopting the structure, the relative position of the guide seat is adjusted through the external manual gear and rack executing device to limit the stroke opening and the flow area of the valve clack, so that the adjustment of the flow resistance, the pressure drop and the flow characteristic of the valve is realized, the use requirements of different medium working conditions are met, and the long-term stable operation of equipment and devices is ensured.
As a preferable technical scheme of the invention, the ends of the inflow end of the valve body and the outflow end of the valve body are provided with valve end flanges.
As a preferable technical scheme of the invention, the upper part of the valve body is provided with a valve cover, and the valve cover is connected with the valve body through a bolt and is fixed through a nut.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a block diagram of a valve stem according to the present invention;
FIG. 3 is a flow diagram of the present invention;
FIG. 4 is a free-running view of the guide sleeve retraction spring of the present invention;
FIG. 5 is a flow resistance characteristic opening indication representative intent of the present invention;
FIG. 6 is a schematic diagram of a gear structure according to the present invention;
FIG. 7 is a left side view of the structure of the present invention;
Fig. 8 is a cross-sectional view of the present invention.
Detailed Description
Embodiment 1 of the adjustable flow resistance pressure drop top-loading axial flow check valve of the present invention is shown in fig. 1-8: adjustable flow resistance pressure drop top-mounted axial flow check valve: the valve comprises a valve body 1, a valve seat 2, a valve clack 3, a spring 4, a guide seat 5, a gear seat 6, a guide sleeve 7, a valve rod 8, a gear 9, a rack 10, a valve cover 11, a packing 12, a pressing plate 13, a limiting block 14, a bracket 15, a valve rod nut 16, a hand wheel 17, a bolt 18 and a nut 19. The adjustable flow resistance and pressure drop upper-mounted axial flow check valve adopts a venturi type flow passage with a variable opening degree from left to right, and a taper pipe flow passage structure with a taper and a taper expansion, so that vortex is not generated when the flow speed of fluid is changed, boundary layer separation is avoided, and the fluid pressure recovery capability of the outlet end of the valve is improved. The adjustable flow resistance and pressure drop upper-mounted axial flow check valve has the function of preventing water hammer, and along with the closing of the valve clack 3, the side pressure of the valve outlet is continuously increased, the side pressure of the valve inlet is continuously reduced, and the pressure increase, namely the water hammer phenomenon, in the pipeline is avoided. The valve clack 3 closes at the moment, and the pressure change of the outlet side of the valve is relatively uniform, so that the phenomenon of local pressure steep increase is avoided, and the water impact influence of the valve clack 3 when closed is weakened.
The adjustable flow resistance and pressure drop upper-mounted axial flow check valve adopts a variable opening Venturi type flow passage, the relative position of the guide seat 5 is regulated by the external manual gear 9 and the rack 10 executing device to limit the stroke opening and the flow area of the valve clack 3, the adjustment of the flow resistance, the pressure drop and the flow characteristic of the valve is realized, the use requirements of different medium working conditions are met, and the long-term stable operation of equipment and devices is ensured.
In the specific flow resistance and pressure drop adjusting method, the hand wheel 17 is rotated, the valve rod 8 ascends and descends under the action of the threads of the valve rod nut 16, the rack 10 on the valve rod 8 drives the gear 9 to rotate, and the gear 9 drives the rack 10 of the guide sleeve 7 to move along the direction of the medium axis. When the end face of the guide sleeve 7 is flush with the end face of the guide seat 5, the valve clack 3 achieves the maximum opening under the action of a medium, namely, the flow resistance and the pressure drop of the valve are minimum, and the flow coefficient is maximum. When the end face of the guide sleeve 7 moves higher than the end face of the guide seat 5, the valve clack 3 is opened under the action of a medium, and the valve clack 3 is limited by the end face of the guide sleeve 7, namely, the flow resistance and the pressure drop of the valve are increased, and the flow coefficient is reduced. When the valve flow resistance and flow characteristics are required to be adjusted by using working conditions, the opening of the valve clack 3 is controlled by rotating the hand wheel 17, and the flow resistance and pressure drop characteristics of the valve can be positioned and controlled at the flow characteristic percentage marked by the bracket 15, so that the medium flow is adjusted. The adjustable flow resistance and pressure drop upper-mounted axial flow check valve adopts an upper-mounted on-line maintenance structure, namely, main parts of the valve: the valve clack 3, the valve seat 2, the guide sleeve 7, the valve rod 8 and other parts are assembled and taken out through the middle cavity flange manhole, so that the valve is maintained on line.
When the valve is assembled, the valve seat 2 and the sealing gasket 20 are placed in the flange, and the valve body 1 is screwed in through a process groove on the valve seat 2. The guide seat 5, the guide sleeve 7, the gear 9, the positioning nut 2419, the spring 4 and the valve clack 3 are assembled into a whole, at the moment, the guide sleeve 7 is retracted into the storage cavity 21 of the guide seat 5, the spring 4 is in a free stretching state, the plane of the valve clack 3 is attached to the end face of the guide seat 5, the total structural length of the valve clack 3 and guide seat 5 assembly is smaller than the length of the long shaft of the flange in the valve body 1, the valve clack 3 and guide seat 5 assembly can be installed into the valve body 1 through the middle flange, and four uniformly distributed positioning groove faces are arranged on the outer circle of the guide seat 5 and are correspondingly matched with three positioning support legs of the valve body 1 to limit when the valve body 1 is installed. The valve cover 11, the valve rod 8 and the rack 10 assembly are inserted into the gear 9 hole of the guide seat 5, at the moment, the positioning support leg of the valve cover 11 presses the guide sleeve 7, the three shafts of the guide seat 5X, Y, Z are respectively positioned, the hand wheel 17 is rotated to enable the rack 10 of the valve rod 8, the gear 9 and the rack 10 of the guide sleeve 7 to relatively move to the pre-tightening position scale of the spring 4, and at the moment, the valve realizes normal opening and closing and non-return functions.
When the valve is required to be checked and maintained in the running process of the equipment, the hand wheel 17 is rotated anticlockwise, the valve rod 8 rises under the action of the threads of the valve rod nut 16, the rack 10 on the valve rod 8 drives the gear 9 to rotate, and the gear 9 drives the rack 10 of the guide sleeve 7 to move rightwards until the guide sleeve 7 is completely retracted to the shrinkage of the gear seat 6. At this time, the manual actuator and the valve cover 11 are removed by the detachable middle flange bolt 18, the spring 4 is in a fully-relaxed state, the end face of the valve clack 3 can be fully opened and retracted to the end face of the guide seat 5, the total length of the valve clack 3 and the guide seat 5 assembly is smaller than the long shaft size of the middle flange, and the valve clack 3+ guide seat 5 assembly can be taken out through the middle flange. The valve seat 2 and the valve body 1 are in threaded connection, the valve seat 2 can be taken down through a process groove of the rotary valve seat 2 and taken out by the middle flange, so that main parts are maintained and replaced on line, and the process pipeline is maintained and operated in time.
The embodiment 2 of the invention is that the adjustable flow resistance pressure drop upper-mounted axial flow check valve comprises a valve body 1, a valve seat 2 is arranged on the valve body 1, a valve clack 3 is arranged in the center of the valve body 1, a valve rod 8 is transversely arranged in the valve clack 3, a guide sleeve 7 is sleeved on the outer surface of the valve rod 8, a spring 4 is sleeved on the outer surface of the guide sleeve 7, the guide sleeve 7 is arranged on a guide seat 5, a gear seat 6 is arranged on the central outer surface of the guide sleeve 7, a gear 9 is arranged on the side edge of the gear seat 6, the gear 9 is meshed with a rack 10 through the gear 9, a toothed bar 28 is arranged above the rack 10, the toothed bar 28 penetrates through a valve cover 11, a filler 12 is arranged at the joint of the valve cover 11 and the toothed bar 28, a limit block 14 is arranged above the filler 12, the limit block 14 is fixed on a bracket 15, and the rack 10 is driven to move through an external manual gear 9 so as to adjust the relative position of the guide seat 5, so as to limit the stroke opening and flow resistance adjustment of the valve clack 3.
The guide seat 5, the guide sleeve 7, the gear 9, the positioning nut 2419, the spring 4 and the valve clack 3 are assembled into a whole, the guide sleeve 7 is retracted into the accommodating cavity 21 of the guide seat 5, the spring 4 is in a free stretching state, the plane of the valve clack 3 is attached to the end face of the guide seat 5, the combined total structural length of the guide seat 5 of the valve clack 3 is smaller than the length of the long shaft of the flange in the valve body 1, the valve clack 3 and the guide seat 5 are assembled into the valve body 1 through the middle flange, and four uniformly distributed positioning groove faces are formed in the outer circle of the guide seat 5; the end face of the valve clack 3 is fully opened and retreated to the end face of the guide seat 5, the total length of the valve clack 3 and the guide seat 5 is smaller than the long axis size of the middle flange, and the valve clack 3 and the guide seat 5 assembly is taken out through the middle flange; the valve seat 2 is in threaded connection with the valve body 1, and the valve seat 2 is taken down and taken out from the middle flange through a process groove for rotating the valve seat 2. The valve cover 11, the valve rod 8 and the rack 10 are inserted into the hole of the gear 9 of the guide seat 5, the positioning support leg of the valve cover 11 presses the guide sleeve 7, the three shafts of the guide seat 5X, Y, Z are respectively positioned, and the hand wheel 17 is rotated to enable the rack 10 of the valve rod 8, the gear 9 and the rack 10 of the guide sleeve 7 to relatively move to the pre-tightening position scale of the spring 4.
A storage cavity 21 is arranged between the guide sleeve 7 and the gear seat 6, and a gear fixing frame 22 is fixed on the gear seat 6. The left side of the valve body 1 is provided with a valve body inflow end 23, and the right side of the valve body 1 is provided with a valve body outflow end 25. The valve body inflow end 23 to the valve body outflow end 25 adopt a venturi type flow passage with variable opening degree from left to right, and a taper pipe flow passage structure with gradually reduced and expanded. A flow resistance characteristic opening indicator 27 is arranged above the valve cover 11, a hand wheel 17 is fixedly connected above the bracket 15 through a valve rod nut 16, the hand wheel 17 is connected with a toothed bar 28, and a gasket 20 is arranged at the joint of the valve body 1 and the valve seat 2. The ends of the valve body inflow end 23 and the valve body outflow end 25 are provided with valve end flanges 26. The upper part of the valve body 1 is provided with a valve cover 11, and the valve cover 11 is connected with the valve body 1 through a bolt 18 and is fixed through a nut 19.
The above embodiments are merely one type of adjustable flow resistance pressure drop top loading axial flow check valve of the preferred embodiments of the present invention, and common variations and substitutions by those skilled in the art within the scope of the present invention are included in the scope of the present invention.
Claims (4)
1. The utility model provides an adjustable flow resistance pressure drop facial make-up formula axial flow check valve, includes valve body, its characterized in that: the valve body is provided with a valve seat, a valve clack is arranged in the center of the valve body, a valve rod is transversely arranged in the valve clack, a guide sleeve is sleeved on the outer surface of the valve rod, a spring is sleeved on the outer surface of the guide sleeve, the guide sleeve is installed on the guide seat, a gear seat is arranged on the outer surface of the center of the guide sleeve, a gear is arranged on the side edge of the gear seat, the gear and the rack are connected through gear engagement, a toothed bar is arranged above the rack, the toothed bar penetrates through a valve cover, a filler is arranged at the joint of the valve cover and the toothed bar, a limit block is arranged above the filler, the limit block is fixed on a support, the external manual gear drives a rack to move so as to adjust the relative position of the guide seat to limit the stroke opening and the flow area of the valve clack, the guide seat, a guide sleeve, a positioning nut, the spring and the assembly are assembled into a whole, the guide sleeve is retracted into a storage cavity of the guide seat, the spring is in a free stretching state, a plane is attached to the end face of the guide seat, the length of a combined structure of the guide seat is smaller than the length of a main flange seat, the main flange seat is retracted into the main flange seat, and the main flange seat is fully extended, and the main flange seat is positioned in the flange seat through the main flange seat, and the main flange seat is fully extended, and the main flange seat is positioned; the valve seat with the valve body adopts threaded connection, takes off the disk seat through the technology groove of rotatory disk seat and takes out by well flange, the valve gap with the valve rod the rack spare inserts the gear hole of guide holder, valve gap location stabilizer blade is pressed the uide bushing, the guide holder X, Y, Z triaxial is fixed a position scale to spring pretension position of rotatory hand wheel messenger valve rod rack, gear, uide bushing rack relative movement, the uide bushing with be provided with the accomodate chamber between the gear seat, be fixed with the gear mount on the gear seat, the left side of valve body is provided with the valve body inflow end, the right side of valve body is provided with the valve body outflow end, the valve body inflow end extremely the valve body outflow end adopts left side to advance to go out the venturi runner of aperture, tapering divergent taper pipe runner structure.
2. The adjustable flow resistance pressure drop upper mounted axial flow check valve of claim 1, wherein: the valve cover is characterized in that a flow resistance characteristic opening indicator is arranged above the valve cover, a hand wheel is fixedly connected above the support through a valve rod nut, the hand wheel is connected with the toothed bar, and a gasket is arranged at the joint of the valve body and the valve seat.
3. The adjustable flow resistance pressure drop upper mounted axial flow check valve of claim 2, wherein: the valve body inflow end and the valve body outflow end are provided with valve end flanges.
4. The adjustable flow resistance pressure drop upper mounted axial flow check valve of claim 3, wherein: the upper portion of valve body is provided with the valve gap, the valve gap with pass through bolted connection between the valve body to through the nut fixation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310863393.8A CN116717618B (en) | 2023-07-13 | 2023-07-13 | Flow resistance and pressure drop adjustable top-mounted axial flow check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310863393.8A CN116717618B (en) | 2023-07-13 | 2023-07-13 | Flow resistance and pressure drop adjustable top-mounted axial flow check valve |
Publications (2)
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| CN212775866U (en) * | 2020-05-22 | 2021-03-23 | 方正阀门集团股份有限公司 | Axial flow type regulating valve |
| CN113187913A (en) * | 2021-04-20 | 2021-07-30 | 吴忠仪表有限责任公司 | Self-locking type upper-mounted axial flow valve |
| CN219159623U (en) * | 2022-12-05 | 2023-06-09 | 凯喜姆阀门有限公司 | Axial-flow check valve capable of being adjusted online |
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| RU2267680C1 (en) * | 2004-05-28 | 2006-01-10 | Общество с ограниченной ответственностью Научно-производственный центр "Анод" | Axial flow valve |
| US8136543B2 (en) * | 2009-01-27 | 2012-03-20 | Fisher Controls International, Llc | Axial flow control valves having an internal actuator |
| CN114857281B (en) * | 2022-04-07 | 2022-11-04 | 浙江电泰阀业有限公司 | Bevel gear transmission light torque middle cavity non-pressure type adjusting type shaft flow valve |
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| CN212775866U (en) * | 2020-05-22 | 2021-03-23 | 方正阀门集团股份有限公司 | Axial flow type regulating valve |
| CN113187913A (en) * | 2021-04-20 | 2021-07-30 | 吴忠仪表有限责任公司 | Self-locking type upper-mounted axial flow valve |
| CN219159623U (en) * | 2022-12-05 | 2023-06-09 | 凯喜姆阀门有限公司 | Axial-flow check valve capable of being adjusted online |
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