CN119123124A - A self-guided flow pressure reducing valve - Google Patents
A self-guided flow pressure reducing valve Download PDFInfo
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- CN119123124A CN119123124A CN202411453825.9A CN202411453825A CN119123124A CN 119123124 A CN119123124 A CN 119123124A CN 202411453825 A CN202411453825 A CN 202411453825A CN 119123124 A CN119123124 A CN 119123124A
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- 238000007789 sealing Methods 0.000 claims description 28
- 238000004080 punching Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 16
- 230000001965 increasing effect Effects 0.000 description 15
- 239000012530 fluid Substances 0.000 description 9
- 239000012535 impurity Substances 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000003872 anastomosis Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
本发明一种自导向流量减压阀，包括减压阀阀体，减压阀阀体的一侧设入口端，另一侧设出口端，减压阀阀体表面分别设阀体进气孔和阀体出气孔；减压阀阀体表面固定安装上阀盖，上阀盖一侧侧壁固定安装有过滤网组件，减压阀阀体内固定安装主阀座，主阀座内安装有主阀瓣，主阀座侧壁面均匀开设腰型孔，主阀座的表面设内六方孔，内六方孔内安装主阀杆的一端，主阀杆另一端安装于上阀盖底面，主阀杆贯穿活塞、气缸，活塞、气缸安装于减压阀阀体；主阀瓣内设主阀瓣内腔，主阀瓣内腔内安装主阀弹簧，减压阀阀体的底面固定安装有下阀盖。本发明有益效果：结构稳定拆卸方便，节约维修成本，实现自导向，避免阀瓣偏移及卡阻。
The present invention discloses a self-guided flow pressure reducing valve, comprising a pressure reducing valve body, an inlet end is arranged on one side of the pressure reducing valve body, an outlet end is arranged on the other side, a valve body air inlet hole and a valve body air outlet hole are arranged on the surface of the pressure reducing valve body; an upper valve cover is fixedly installed on the surface of the pressure reducing valve body, a filter screen assembly is fixedly installed on the side wall of one side of the upper valve cover, a main valve seat is fixedly installed in the pressure reducing valve body, a main valve disc is installed in the main valve seat, waist-shaped holes are evenly provided on the side wall of the main valve seat, an inner hexagonal hole is arranged on the surface of the main valve seat, one end of the main valve stem is installed in the inner hexagonal hole, the other end of the main valve stem is installed on the bottom surface of the upper valve cover, the main valve stem passes through a piston and a cylinder, and the piston and the cylinder are installed on the pressure reducing valve body; a main valve disc inner cavity is arranged in the main valve disc, a main valve spring is installed in the main valve disc inner cavity, and a lower valve cover is fixedly installed on the bottom surface of the pressure reducing valve body. The present invention has the following beneficial effects: the structure is stable and easy to disassemble, the maintenance cost is saved, self-guide is realized, and the valve disc displacement and jamming are avoided.
Description
Technical Field
The invention relates to the technical field of pressure reducing valve equipment, in particular to a self-guiding flow pressure reducing valve.
Background
The self-operated pressure reducing valve can simply consider that the pressure in front of the valve is reduced to the pressure required after the valve through the throttling of the opening and closing piece, and simultaneously, when the inlet pressure and the flow rate change, the energy of the medium can be utilized to keep the outlet pressure basically unchanged. The pressure reducing and stabilizing device is widely applied to occasions requiring pressure reducing and stabilizing such as water supply systems, hydraulic systems and the like.
At present, the main valve seat and the main valve clack of the self-operated pressure reducing valve in China are mainly separated, the structure is simple in design, the requirement on the matching relation between the valve seat and the valve clack is low, a series of problems are brought, such as lack of guiding or poor guiding coaxiality of the valve clack, poor matching degree with the valve seat, high back-end pressure, high sealing surface and conical surface, high requirement on the valve clack seating, high possibility of medium leakage, high requirement on the coaxiality of the valve rod embedded into the valve clack, high requirement on the valve rod assembly chain, easy blockage and the like. In order to solve the problems, the patent researches a self-guiding main valve seat valve clack component, namely, a main valve clack directly slides in a valve seat in working, external guiding is not needed, the valve clack is ensured to be perfectly seated, the guiding problem is solved, the medium leakage problem caused by low anastomosis degree of the valve clack valve seat is avoided, and the waste of energy sources is greatly reduced. Waist-shaped holes are uniformly distributed on the circumference of the valve seat, so that the flow capacity is solved, the flow rate can be accurately controlled, and the combined function relation of the opening and the flow rate is formed, therefore, the development of the self-guiding flow rate adjustable pressure-reducing valve seat part is particularly important.
For the current pilot-operated pressure reducing valve, the pilot valve is used as a pilot component, the machining precision is strict, the stroke is extremely small, the flow channel is narrow, the sealing surface is extremely easy to be blocked or scratched by impurities in a medium, a filter is usually additionally arranged in front of the pressure reducing valve, and nevertheless, the fine impurities are difficult to block from entering the pilot valve, so that the working performance of the pressure reducing valve is influenced.
The traditional pilot valve is mainly split type, and mainly utilizes a valve cover and a pilot valve core to jointly form a pilot component.
Disclosure of Invention
The invention aims to provide the self-guiding flow pressure reducing valve which has the advantages of reasonable structural design, novel conception, convenient operation, stable structure and convenient disassembly, can save maintenance cost, solve the problem that the pilot valve is blocked, realize self-guiding and avoid valve clack deviation and blocking.
The invention relates to a self-guiding flow pressure reducing valve, which comprises a pressure reducing valve body, wherein one side of the pressure reducing valve body is provided with an inlet end, the other side of the pressure reducing valve body is provided with an outlet end, the surface of the pressure reducing valve body is respectively provided with a valve body air inlet hole and a valve body air outlet hole, the surface of the pressure reducing valve body is fixedly provided with an upper valve cover, one side wall of the upper valve cover is fixedly provided with a filter screen assembly, a main valve seat is fixedly arranged in the pressure reducing valve body, a main valve clack is arranged in the main valve seat, the side wall surface of the main valve seat is uniformly provided with waist-shaped holes, the surface of the main valve seat is provided with inner hexagonal holes, one end of a main valve rod is arranged in the inner hexagonal holes, the other end of the main valve rod is arranged on the bottom surface of the upper valve cover, the main valve rod penetrates through a piston and a cylinder, the piston and the cylinder is arranged on the pressure reducing valve body, a main valve clack cavity is arranged in the main valve clack, a main valve spring is arranged in the main valve cavity, the bottom surface of the pressure reducing valve body is fixedly provided with a lower valve cover, the bottom end of the main valve spring is positioned on the surface of the lower valve cover, and the bottom of the main valve spring is fixedly provided with an adjusting sleeve.
The main valve is embedded in the main valve seat valve, the main valve is arranged in the main valve seat, the main valve can be opened and closed in the main valve seat without other guiding devices, the self-guiding is realized, the deviation and the blocking of the valve clack are avoided, waist-shaped holes are uniformly distributed in the circumferential direction of the valve seat, the specific functional relation between the relative opening and the relative flow can be realized, the flow change is unstable in the initial stage and the final stage, at the moment, the semicircular flow section can enable the flow to be equal-percentage characteristic with the opening, the flow change is small when the flow is small, the flow change is large when the flow is large, namely, the flow change is large on different openings, the same adjusting precision is ensured, the adjusting precision and the flow stability of the pressure reducing valve are ensured, the middle stroke is realized, the flow section is rectangular, the quick-opening flow characteristic is realized, the flow is large when the flow is small, and the flow of the valve opening is very fast to be maximum along with the increase of the stroke.
The surface of the upper valve cover is fixedly provided with a pilot diaphragm, and the bottom surface of the pilot diaphragm is provided with a pilot valve component through threads of the upper valve cover.
The pilot valve assembly comprises a pilot valve seat, a pilot valve seat annular groove, a pilot valve seat conical sealing strip, a pilot valve seat air flow hole, a pilot spring, a pilot valve core labyrinth groove, a pilot valve core throat, a pilot valve core spherical sealing strip and a pilot valve back cap, wherein the pilot valve seat is positioned in an upper valve cover, the side wall surface of the pilot valve seat is provided with the pilot valve seat annular groove, the side wall of the pilot valve seat annular groove is provided with the pilot valve seat air flow hole, the pilot spring is arranged in an inner cavity of the pilot valve seat, the surface of the pilot valve is contacted with the pilot valve back cap, the pilot valve back cap is positioned on the bottom surface of a pilot valve adjusting bolt, the bottom surface of the pilot spring is positioned on the inner cavity surface of the pilot valve seat, the pilot valve core is arranged in the pilot valve seat, the pilot valve core groove is formed in the surface of the pilot valve core, and the pilot valve core throat is arranged on the pilot valve core.
The pilot valve assembly has the functions of 1) controlling the action of a main valve by sensing the change of the medium pressure so as to realize stable control of the medium pressure, 2) controlling a pilot reducing valve based on negative feedback control, when the medium pressure exceeds a set value, the pilot valve senses the change of the medium pressure, and reduces the flow of the medium by controlling the closing of the main valve so as to reduce the medium pressure, and when the medium pressure is lower than the set value, the pilot valve senses the change of the medium pressure, and increases the flow of the medium by controlling the opening of the main valve so as to increase the medium pressure. The principle of the negative feedback control can keep the pressure of the medium near the set value all the time, and realizes the stable control of the pressure of the medium.
The bottom surface of the pilot valve seat is provided with a pilot valve seat conical sealing belt, and the bottom surface of the pilot valve core is provided with a pilot valve core spherical sealing belt.
The upper valve cover comprises an upper valve cover vertical air inlet hole, an upper valve cover horizontal air inlet hole, an upper valve cover rear end air flow feedback hole, an upper valve cover horizontal air outlet hole, an upper valve cover vertical air outlet hole, an upper valve cover rear side process hole and an upper valve cover rear side air flow hole, wherein the bottom surface of the upper valve cover is provided with an upper valve cover vertical air inlet hole, the top end of the upper valve cover vertical air inlet hole is communicated with the upper valve cover horizontal air inlet hole, the surface of the upper valve cover is provided with an upper valve cover rear end air flow feedback hole, the bottom end of the upper valve cover rear end air flow feedback hole is communicated with the upper valve cover horizontal air outlet hole, the bottom surface of the upper valve cover horizontal air outlet hole is communicated with the upper valve cover vertical air outlet hole, the upper valve cover vertical air inlet hole is connected with the valve body air inlet hole through an elastic cylindrical pin, and the upper valve cover vertical air outlet hole is connected with the valve body air outlet hole through the elastic cylindrical pin.
The upper valve cover is arranged to better control the flow and pressure of the pressure reducing valve.
The filter screen assembly comprises a filter screen plug, a punching plate, a filter screen and a rectangular cushion, wherein the filter screen plug is connected with the upper valve cover, the punching plate is arranged on the inner side wall of the filter screen plug, the filter screen is arranged on the surface of the punching plate, and the rectangular cushion is arranged between the filter screen assembly and the valve cover.
The filter screen subassembly is before preceding pilot valve, and the runner entrance of upper valve gap utilizes the filter screen, can block the tiny impurity in the medium before preceding pilot valve, has not only protected the pilot valve, guarantees the normal work of relief pressure valve, because filter screen part maintenance is frequent, and this filter screen subassembly sets up and dismantles conveniently on the valve gap, and it is convenient to maintain.
The invention has the beneficial effects that:
1) The main valve clack is embedded into the main valve seat valve, and is arranged in the main valve seat, so that the main valve clack can be opened and closed in the main valve seat without other guiding devices, self-guiding is realized, and valve clack deflection and blocking are avoided; waist-shaped holes are uniformly distributed on the circumference of the valve seat, so that the effect of adjusting the flow and the pressure of fluid can be achieved, the cross-sectional area of the fluid passing through can be controlled by changing the opening of the waist-shaped holes, and therefore, the flow and the pressure of the fluid can be adjusted, and when the flow needs to be reduced, the opening of the waist-shaped holes can be properly reduced; on the contrary, when the flow is required to be increased, the opening degree of the waist-shaped hole can be increased, the shape design of the waist-shaped hole enables the waist-shaped hole to have certain linear characteristic when the flow and the pressure are regulated, the output of the fluid can be controlled accurately, the waist-shaped hole can help balance the pressure before and after the valve seat in the peripheral arrangement during the working process of the pressure reducing valve, the influence of pressure fluctuation on the valve performance is reduced, when the fluid flows from the high-pressure side to the low-pressure side, the waist-shaped hole can enable a part of the fluid to flow from the high-pressure side to the peripheral area of the low-pressure side, thereby playing the role of balancing the pressure, improving the stability and the reliability of the valve, the waist-shaped hole can reduce the accumulation and the blockage of impurities in the fluid at the valve seat, generate certain flow velocity and turbulence when the fluid passes through the waist-shaped hole, the pressure difference is helpful to wash away the impurities and prevent the impurities from accumulating on the valve seat, the normal operation of the valve is ensured, the pressure reducing valve can respond to the change of a system more quickly when the flow and the pressure are regulated, the waist-shaped hole can change the flow or the waist-shaped hole can realize the new flow balancing state when the waist-shaped flow is changed, the response speed and the control precision of the system are improved, the opening degree of the waist-shaped hole of the pressure reducing valve seat and the flow rate are in close relation, in general, the larger the opening degree is, the larger the flow rate is, the smaller the opening degree is, the opening degree is approximately in linear relation with the flow rate in the straight line section of the waist-shaped hole, the flow rate is correspondingly and linearly increased when the opening degree is gradually increased, otherwise, the flow rate is also linearly reduced when the opening degree is gradually reduced, an operator can control the flow rate more accurately by simply adjusting the opening degree of the waist-shaped hole through the linear relation, in practical application, the relation between the opening degree and the flow rate is not completely linear due to the influences of factors such as the property of fluid, the pressure difference, the valve structure and the like, the change of the flow rate can be relatively slow at the two ends with smaller opening degree and larger opening degree, the change of the flow rate is in percentage characteristics such as to be small, even if the opening degree is slightly reduced again, the change of the flow rate is not obvious when the opening degree is gradually increased, and the increasing effect of the opening degree is further increased to the flow rate is gradually reduced when the opening degree is close to the maximum, namely, the opening degree is also reduced in different opening degree is, the flow rate is reduced, and the flow rate is, and the stability of the pressure of the flow rate is ensured.
2) The pilot valve assembly has the functions that a, the pilot valve controls the action of a main valve through sensing the change of the medium pressure so as to realize stable control of the medium pressure, b, the pilot type pressure reducing valve is based on negative feedback control, when the medium pressure exceeds a set value, the pilot valve senses the change of the medium pressure, the closing of the main valve is controlled to reduce the flow of the medium so as to reduce the medium pressure, when the medium pressure is lower than the set value, the pilot valve senses the change of the medium pressure, and the opening of the main valve is controlled to increase the flow of the medium so as to increase the medium pressure. The principle of the negative feedback control can keep the pressure of the medium near the set value all the time, and realizes the stable control of the pressure of the medium.
3) The upper valve cover is arranged to better control the flow and pressure of the pressure reducing valve.
4) The filter screen subassembly is before preceding pilot valve, and the runner entrance of upper valve gap utilizes the filter screen, can block the tiny impurity in the medium before preceding pilot valve, has not only protected the pilot valve, guarantees the normal work of relief pressure valve, because filter screen part maintenance is frequent, and this filter screen subassembly sets up and dismantles conveniently on the valve gap, and it is convenient to maintain.
5) The device structural design is reasonable, novel in conception, convenient and fast to operate, stable in structure and convenient to detach, maintenance cost can be saved, the main valve seat and the main valve flap are guaranteed to be perfectly seated, leakage of medium is avoided, and waste of energy sources is greatly reduced. The valve seat of the valve clack is compact and attractive in whole, excellent and stable in performance, the filter screen assembly is arranged on the inlet runner of the upper valve cover, the phenomenon that the pressure at the rear end of the pressure reducing valve is high and influences the performance of the pressure reducing valve due to the fact that impurities enter the clamped pilot valve is avoided, and the integral pilot valve design can ensure that the valve core of the pilot valve is matched with the pilot valve seat stably, is good in sealing performance and is convenient to assemble and disassemble.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a partial view of the upper valve cover of the present invention;
FIG. 3 is a schematic view of the main valve seat according to the present invention;
FIG. 4 is a front cross-sectional view of a main valve seat of the present invention;
FIG. 5 is a top view of a main valve seat according to the present invention;
FIG. 6 is a front cross-sectional view of a main valve flap of the present invention;
fig. 7 is a front cross-sectional view of a filter screen assembly according to the present invention;
FIG. 8 is a front cross-sectional view of a pilot valve assembly of the present invention.
In the figure: valve body 1, valve body air inlet 101, valve body air outlet 102, inlet 103, outlet 104, main valve spring 2, main valve 3, main valve spherical sealing belt 301, main valve cavity 302, main valve seat 4, waist-shaped hole 401, valve seat conical sealing belt 402, inner hexagonal hole 403, elastic cylindrical pin 5, filter screen assembly 6, filter screen plug 601, punching plate 602, filter screen 603, rectangular cushion 604, upper valve cover 7, upper valve cover vertical air inlet 701, upper valve cover horizontal air inlet 702, upper valve cover rear end air flow feedback hole 703, upper valve cover horizontal air outlet 704, upper valve cover vertical air outlet 705, upper valve cover horizontal air outlet 704 the valve comprises an upper valve cover rear side process hole 706, an upper valve cover rear side air flow hole 707, an adjusting sleeve 8, a locking nut 9, an adjusting bolt 10, an adjusting spring 11, a pilot diaphragm 12, a pilot valve assembly 13, a pilot valve seat 1301, a pilot valve seat annular groove 13011, a pilot valve seat conical sealing belt 13012, a pilot valve seat air flow hole 13013, a pilot spring 1302, a pilot valve core 1303, a pilot valve core labyrinth groove 1303, a pilot valve core throat 13032, a pilot valve core spherical sealing belt 13033, a pilot valve back cap 1304, a pilot valve adjusting bolt 1305, a sealing gasket 14, a piston 15, a cylinder 16, a main valve rod 17 and a lower valve cover 18.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
The invention comprises a valve body 1, a valve body air inlet 101, a valve body air outlet 102, an inlet 103, an outlet 104, a main valve spring 2, a main valve 3, a main valve spherical sealing belt 301, a main valve inner cavity 302, a main valve seat 4, a waist-shaped hole 401, a valve seat conical sealing belt 402, an inner hexagonal hole 403, an elastic cylindrical pin 5, a filter screen assembly 6, a filter screen plug 601, a punching plate 602, a filter screen 603, a rectangular cushion 604, an upper valve cover 7, an upper valve cover vertical air inlet 701, an upper valve cover horizontal air inlet 702, an upper valve cover rear end air flow feedback hole 703, an upper valve cover horizontal air outlet 704, an upper valve cover vertical air outlet 705, a lower valve cover vertical air outlet 705 an upper valve cover rear side process hole 706, an upper valve cover rear side air flow hole 707, an adjusting sleeve 8, a locking nut 9, an adjusting bolt 10, an adjusting spring 11, a pilot diaphragm 12, a pilot valve assembly 13, a pilot valve seat 1301, a pilot valve seat annular groove 13011, a pilot valve seat conical sealing belt 13012, a pilot valve seat air flow hole 13013, a pilot spring 1302, a pilot valve core 1303, a pilot valve core labyrinth groove 1303, a pilot valve core throat 13032, a pilot valve core spherical sealing belt 13033, a pilot valve back cap 1304, a pilot valve adjusting bolt 1305, a sealing pad 14, a piston 15, a cylinder 16, a main valve rod 17, a lower valve cover 18, the concrete structure comprises a pressure reducing valve body 1, wherein one side of the pressure reducing valve body 1 is provided with an inlet end 103, the other side is provided with an outlet end 104, and the surface of the pressure reducing valve body 1 is respectively provided with a valve body air inlet hole 101 and a valve body air outlet hole 102; an upper valve cover 7 is fixedly arranged on the surface of the pressure reducing valve body 1, a filter screen assembly 6 is fixedly arranged on one side wall of the upper valve cover 7, a main valve seat 4 is fixedly arranged in the pressure reducing valve body 1, a main valve clack 3 is arranged in the main valve seat 4, waist-shaped holes 401 are uniformly formed on the side wall surface of the main valve seat 4, inner hexagonal holes 403 are formed on the surface of the main valve seat 4, one end of a main valve rod 17 is arranged in the inner hexagonal hole 403, the other end of the main valve rod 17 is arranged on the bottom surface of the upper valve cover 7, the main valve rod 17 penetrates through the piston 15 and the cylinder 16, the piston 15 and the cylinder 16 are arranged on the pressure reducing valve body 1, a main valve clack inner cavity 302 is arranged in the main valve clack 3, a main valve spring 2 is arranged in the main valve clack inner cavity 302, a lower valve cover 18 is fixedly arranged on the bottom surface of the pressure reducing valve body 1, the bottom end of the main valve spring 2 is positioned on the surface of the lower valve cover 18, and an adjusting sleeve 8 is fixedly arranged on the surface of the upper valve cover 7.
The surface of the upper valve cover 7 is fixedly provided with a pilot diaphragm 12, and the bottom surface of the pilot diaphragm 12 is provided with a pilot valve assembly 13 through upper valve cover threads.
The pilot valve assembly 13 comprises a pilot valve seat 1301, a pilot valve seat annular groove 13011, a pilot valve seat conical sealing belt 13012, a pilot valve seat air flow hole 13013, a pilot spring 1302, a pilot valve spool 1303, a pilot valve spool labyrinth groove 1303, a pilot valve spool throat 1303, a pilot valve spool spherical sealing belt 13033 and a pilot valve back cap 1304, wherein the pilot valve seat 1301 is positioned in an upper valve cover 7, a pilot valve seat annular groove 13011 is formed in the side wall surface of the pilot valve seat 1301, a pilot valve seat air flow hole 13013 is formed in the side wall of the pilot valve seat annular groove 13011, a pilot spring 1302 is installed in the inner cavity of the pilot valve seat 1301, the surface of the pilot spring 1302 is in contact with the pilot valve back cap 1304, the bottom surface of a pilot valve adjusting bolt 1305 positioned in the pilot valve back cap 1305 is positioned in the inner cavity surface of the pilot valve seat 1301, a pilot valve spool 1303 is installed in the pilot valve seat 1301, and a pilot valve spool groove 1303 is formed in the surface of the pilot valve spool 1303.
The bottom surface of the pilot valve seat 1301 is provided with a pilot valve seat conical sealing belt 13012, and the bottom surface of the pilot valve element 1303 is provided with a pilot valve element spherical sealing belt 13033.
The upper valve cover 7 comprises an upper valve cover vertical air inlet 701, an upper valve cover horizontal air inlet 702, an upper valve cover rear end air flow feedback hole 703, an upper valve cover horizontal air outlet 704, an upper valve cover vertical air outlet 705, an upper valve cover rear side process hole 706 and an upper valve cover rear side air flow hole 707, wherein the upper valve cover vertical air inlet 701 is arranged on the bottom surface of the upper valve cover 7, the top end of the upper valve cover vertical air inlet 701 is communicated with the upper valve cover horizontal air inlet 702, the upper valve cover rear end air flow feedback hole 703 is arranged on the surface of the upper valve cover 7, the bottom end of the upper valve cover rear end air flow feedback hole 703 is communicated with the upper valve cover horizontal air outlet 704, the bottom surface of the upper valve cover horizontal air outlet 704 is communicated with the upper valve cover vertical air outlet 705, the upper valve cover vertical air inlet 701 is connected with the valve body air inlet 101 through an elastic cylindrical pin 5, and the upper valve cover vertical air outlet 705 is connected with the valve body air outlet 102 through the elastic cylindrical pin 5.
The filter screen subassembly 6 include filter screen end cap 601, punching plate 602, filter screen 603, rectangle cushion 604, filter screen end cap 601 is connected with upper valve gap 7, punching plate 602 is installed to filter screen end cap 601's inside wall, the surface of punching plate 602 is provided with filter screen 603, is provided with rectangle cushion 604 between filter screen subassembly 6 and valve gap 7.
The number of the filter screen 603 is 200 meshes, and the number of the waist-shaped holes 401 is 8.
The use method comprises the steps of realizing sealing of a joint of a main valve seat 4 and a partition plate of a valve body 1 through threaded connection by using a copper pad, connecting a lower valve cover 18 and a valve clack 3 by a main valve spring 2, directly contacting the upper part of the main valve clack 3 with a main valve rod 17 to generate mutual pushing action, rolling a filter screen and a punching plate into a cylinder shape, inserting a filter screen plug 601 to form a filter screen assembly 6, screwing the filter screen assembly 6 into an upper valve cover 7 to realize filtering of media entering an air inlet hole 101 of the valve body, sequentially installing a pilot valve seat 1301, a pilot spring 1302, a pilot valve core 1303, a pilot valve back cap 1304 and a pilot valve adjusting bolt 1305 into a pilot valve assembly 13, installing the pilot valve assembly into the upper valve cover 7, and sealing the pilot valve assembly and the upper valve seat with the copper pad.
The main valve seat 4 is arranged in the valve body 1 of the pressure reducing valve through threads by utilizing the inner hexagon 403 of the main valve seat, as shown in fig. 1, in an initial state, the main valve spring 2 is in an initial state, the main valve is closed, the main valve flap 3 falls on the valve seat 4 to realize line sealing, the adjusting bolt 10 compresses the adjusting spring 11, so that the pilot diaphragm 12 deforms downwards to act on the pilot valve adjusting bolt 1305, the pilot valve core 1303 is separated from the pilot valve seat 1301, and the pilot valve is opened. With the pressure reducing valve guide valve opened, medium enters the upper cavity of the piston 15 through the valve body air inlet hole 101, the filter screen assembly 6, the upper valve cover vertical air inlet pipe 701, the upper valve cover horizontal air inlet hole 702, the pilot valve assembly 13, the upper valve cover rear side process hole 706 and the upper valve cover rear side air flow hole 707, the piston 15 is pushed to drive the main valve rod 17 to move downwards, then the main valve clack 3 is pushed to compress the main valve spring 2 to move downwards, the main valve is opened, the medium circulates through the main valve, and at the moment, a stable secondary pressure exists at the corresponding rear end, meanwhile, the rear end medium can give a reaction force to the pilot diaphragm 12 through the valve body air outlet hole 102, the upper valve cover vertical air outlet hole 705, the upper valve cover horizontal air outlet hole 704 and the upper valve cover rear end air flow feedback hole 703, and at the moment, the pilot diaphragm 12 is balanced in force.
When the front flow of the valve is increased, the rear flow is increased, the rear secondary pressure is increased at the moment, but the rear flow is fed back to the lower part of the pilot diaphragm 12, the pilot 11 spring is compressed, the opening of the pilot valve is reduced, the opening of the main valve is reduced, the rear flow is reduced, and the pressure of the rear end is unchanged.
If the flow is to be increased under the condition that the back end pressure is unchanged, the opening of the back end regulating valve is increased, and the back end pressure is reduced theoretically, but at the moment, the reaction force below the pilot diaphragm 12 is reduced, the opening of the pilot valve is increased, the opening of the main valve is increased, the flow is increased, the back end pressure can be compensated by large flow, and the stability of the back end secondary pressure is ensured.
Claims (6)
1. A self-guiding flow reducing valve comprises a reducing valve body (1), wherein one side of the reducing valve body (1) is provided with an inlet end (103), and the other side is provided with an outlet end (104), and is characterized in that the surface of the reducing valve body (1) is respectively provided with a valve body air inlet hole (101) and a valve body air outlet hole (102), an upper valve cover (7) is fixedly arranged on the surface of the reducing valve body (1), a filter screen assembly (6) is fixedly arranged on one side wall of the upper valve cover (7), a main valve seat (4) is fixedly arranged in the reducing valve body (1), a main valve clack (3) is arranged in the main valve seat (4), waist-shaped holes (401) are uniformly formed in the side wall surface of the main valve seat (4), an inner hexagonal hole (403) is formed in the surface of the main valve seat (4), one end of a main valve rod (17) is arranged in the inner hexagonal hole (403), the other end of the main valve rod (17) is arranged on the bottom surface of the upper valve body (7), the main valve rod (17) penetrates through a piston (15) and a cylinder (16), the piston (15) and the cylinder (16) is arranged on the main valve body (1), the main valve clack is fixedly arranged in the main valve body (3), a main valve plate (302), a bottom cavity (302) is fixedly arranged in the main valve body (2), the bottom end of the main valve spring (2) is positioned on the surface of the lower valve cover (18), and an adjusting sleeve (8) is fixedly arranged on the surface of the upper valve cover (7).
2. A self-guiding flow reducing valve as set forth in claim 1, wherein the surface of the upper valve cover (7) is fixedly provided with a pilot diaphragm (12), and the bottom surface of the pilot diaphragm (12) is provided with a pilot valve assembly (13) through an upper valve cover thread.
3. The self-guiding flow pressure reducing valve according to claim 2, wherein the pilot valve assembly (13) comprises a pilot valve seat (1301), a pilot valve seat annular groove (13011), a pilot valve seat conical sealing strip (13012), a pilot valve seat air flow hole (13013), a pilot spring (1302), a pilot valve spool (1303), a pilot valve spool labyrinth groove (1303), a pilot valve spool throat (13032), a pilot valve spool spherical sealing strip (13033) and a pilot valve back cap (1304), the pilot valve seat (1301) is positioned in an upper valve cover (7), a side wall surface of the pilot valve seat (1301) is provided with a pilot valve seat annular groove (13011), a side wall of the pilot valve seat annular groove (13011) is provided with a pilot valve seat air flow hole (13013), an inner cavity of the pilot valve seat (1301) is provided with a pilot spring (1302), the surface of the pilot spring (1302) is in contact with the back cap (1304), the bottom surface of a pilot valve adjusting bolt (1305) positioned by the pilot valve cap (1304), the bottom surface of the pilot spring (1303) is positioned on the inner cavity surface of the pilot valve seat (1301), the pilot valve spool (1303) is arranged in the valve seat (1301), and the pilot valve spool (1303) is provided with the pilot valve spool (1303) on the surface.
4. A self-guiding flow pressure reducing valve as set forth in claim 3, wherein a pilot valve seat conical sealing belt (13012) is arranged on the bottom surface of the pilot valve seat (1301), and a pilot valve core spherical sealing belt (13033) is arranged on the bottom surface of the pilot valve core (1303).
5. A self-guiding flow reducing valve is characterized in that the upper valve cover (7) comprises an upper valve cover vertical air inlet hole (701), an upper valve cover horizontal air inlet hole (702), an upper valve cover rear end air flow feedback hole (703), an upper valve cover horizontal air outlet hole (704), an upper valve cover vertical air outlet hole (705), an upper valve cover rear side process hole (706) and an upper valve cover rear side air flow hole (707), an upper valve cover vertical air inlet hole (701) is arranged on the bottom surface of the upper valve cover (7), the top end of an upper valve cover vertical air inlet pipe (701) is communicated with the upper valve cover horizontal air inlet hole (702), an upper valve cover rear end air flow feedback hole (703) is arranged on the surface of the upper valve cover (7), the bottom end of the upper valve cover rear end air flow feedback hole (703) is communicated with the upper valve cover horizontal air outlet hole (704), the bottom surface of the upper valve cover horizontal air outlet hole (704) is communicated with the upper valve cover vertical air outlet hole (705), the upper valve cover vertical air inlet hole (701) is connected with a valve body air inlet hole (101) through an elastic cylindrical pin (5), and the upper valve cover vertical air outlet hole (705) is connected with a valve body air outlet hole (102) through the elastic cylindrical pin (5).
6. The self-guiding flow pressure reducing valve of claim 5, wherein the filter screen assembly (6) comprises a filter screen plug (601), a punching plate (602), a filter screen (603) and a rectangular soft cushion (604), the filter screen plug (601) is connected with the upper valve cover (7), the punching plate (602) is arranged on the inner side wall of the filter screen plug (601), the filter screen (603) is arranged on the surface of the punching plate (602), and the rectangular soft cushion (604) is arranged between the filter screen assembly (6) and the valve cover (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411453825.9A CN119123124A (en) | 2024-10-17 | 2024-10-17 | A self-guided flow pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411453825.9A CN119123124A (en) | 2024-10-17 | 2024-10-17 | A self-guided flow pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119123124A true CN119123124A (en) | 2024-12-13 |
Family
ID=93766402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411453825.9A Pending CN119123124A (en) | 2024-10-17 | 2024-10-17 | A self-guided flow pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119123124A (en) |
-
2024
- 2024-10-17 CN CN202411453825.9A patent/CN119123124A/en active Pending
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