CN110094279B - Pressure reducing valve capable of accurately adjusting flow - Google Patents
Pressure reducing valve capable of accurately adjusting flow Download PDFInfo
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- CN110094279B CN110094279B CN201910330572.9A CN201910330572A CN110094279B CN 110094279 B CN110094279 B CN 110094279B CN 201910330572 A CN201910330572 A CN 201910330572A CN 110094279 B CN110094279 B CN 110094279B
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 230000006837 decompression Effects 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 13
- 239000003949 liquefied natural gas Substances 0.000 abstract description 2
- 239000003915 liquefied petroleum gas Substances 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 239000003345 natural gas Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 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
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0233—Details of actuators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0236—Multi-way valves; Multiple valves forming a multi-way valve system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0239—Pressure or flow regulators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a pressure reducing valve capable of accurately adjusting flow, which comprises an integrally cast valve body, wherein an air inlet and an air outlet are arranged on the valve body, a buffer cavity is arranged between the air inlet and the air outlet in the valve body, an electromagnetic valve is arranged at the air inlet, a proportional balance valve is arranged at the air outlet, a proportional valve core driven by an electromagnet and a fixed valve seat are arranged in the proportional balance valve, and a valve port section which linearly changes along with the axial displacement of the proportional valve core is formed between the proportional valve core and the valve seat. Through the proportional balance valve who adds, can utilize the electromagnetic force to ensure CNG output pressure stable to can realize the automated control of flow through the size of adjusting current. The invention can be used not only in CNG gas pressure reducing devices of automobiles and ships, but also in other fields, such as pressure reducing valves of liquefied petroleum gas or liquefied natural gas, which can accurately regulate flow.
Description
Technical Field
The invention relates to the field of pressure reducing valves capable of accurately adjusting flow of gas systems, in particular to a pressure reducing valve capable of accurately adjusting flow.
Background
CNG (compressed natural gas) is used as a gas fuel, is mixed with air more uniformly, is combusted more fully, and discharges less harmful substances such as CO, HC and the like; the natural gas is not accumulated with carbon after being combusted, thereby reducing the abrasion of the engine and having low maintenance cost; the natural gas engine is simple to modify, and particularly, the dual-fuel engine modified by the gasoline engine has extremely high cost performance and wide application; therefore, the compressed natural gas CNG used as the fuel of the current new energy automobile is suitable for the current environmental protection requirement.
With the rapid development of natural gas automobiles, the number of natural gas automobiles in the market is increased year by year. And systems using CNG (compressed natural gas) have increased accordingly. In a CNG gas control system, a pressure reducing valve belongs to a core component, and CNG gas compressed by a steel cylinder under 20MPa needs to be gasified and decompressed in the pressure reducing valve before entering a cylinder of an automobile engine for combustion. The existing pressure reducing valve has the problems of low automation degree, unstable pressure, low ventilation flow, difficult flow adjustment and difficult processing. For example, chinese patent document CN205938033U describes a pressure reducing valve in which pressure reduction is achieved by providing a spring and an elastic diaphragm in a pressure reducing chamber, as shown in fig. 9. The problem that flow regulation is difficult exists promptly in this structure, and the elasticity of diaphragm and spring receives the influence of temperature variation easily, and the CNG gas can absorb a large amount of heats at the decompression in-process and make the temperature drop to make the flow of relief pressure valve be difficult for stably.
Disclosure of Invention
The invention aims to provide a pressure reducing valve capable of accurately adjusting flow, which can ensure stable output pressure and realize automatic adjustment of flow. In a preferred embodiment, a linear flow rate regulation curve can be obtained. The combustion efficiency of the engine is greatly improved. Through optimizing the structure, can reduce the processing degree of difficulty of valve body.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a pressure reducing valve capable of accurately adjusting flow comprises an integrally cast valve body, wherein an air inlet and an air outlet are formed in the valve body, a buffer cavity is formed in the valve body and located between the air inlet and the air outlet, an electromagnetic valve is arranged at the air inlet, a proportional balance valve is arranged at the air outlet, a proportional valve spool driven by an electromagnet and a fixed valve seat are arranged in the proportional balance valve, and a valve port cross section which linearly changes along with the axial displacement of the proportional valve spool is formed between the proportional valve spool and the valve seat.
In a preferred scheme, in the proportional balance valve, a valve seat plate is arranged in the middle of a proportional valve shell, a cavity in the proportional valve shell is divided into an air inlet part and an air outlet part, a through hole is formed in the valve seat plate, a valve seat vertical plate approximately vertical to the valve seat plate is arranged around the air outlet part of the through hole, and a plurality of approximately vertical proportional valve ports are formed in the valve seat vertical plate;
the structure of the proportional valve spool is as follows: the valve core plate is fixedly connected with a valve core rod which is approximately vertical, the valve core plate and the valve seat plate form a sealing structure, and a valve port core plate corresponding to the proportional valve port is arranged on the valve core plate;
the valve core rod passes through the through hole, and the valve port core plate is slidably arranged in the proportional valve port;
and a proportional valve armature is fixedly arranged on the valve core rod, a proportional valve coil is arranged on one side of the proportional valve armature, which is close to the valve core plate, and the proportional valve coil is fixedly connected with a proportional valve shell.
In the preferred scheme, the valve port core plate and the side wall of the proportional valve port form a sliding sealing structure, and a gap is arranged between the valve core plate and the inner wall of the valve seat vertical plate.
In the preferable scheme, a sliding sealing structure is formed between the valve port core plate and the inner wall of the valve seat vertical plate.
In a preferred embodiment, a sealing ring is provided on the valve seat plate or the valve core plate.
In the preferred scheme, the end of the valve core rod far away from the valve core plate is provided with a buffer head, the corresponding position of the proportional valve shell is provided with a buffer cavity, and an airtight buffer structure is formed between the buffer head and the buffer cavity.
In a preferred scheme, an air inlet part of the proportional balance valve is communicated with the buffer cavity, and an air outlet part of the proportional balance valve is communicated with the air outlet.
In the preferred scheme, a heat exchange cavity is arranged on the outer wall of the buffer cavity, and a first heat exchange medium interface and a second heat exchange medium interface which are used for being connected with an engine cooling liquid pipeline are arranged on the buffer cavity.
In the preferred scheme, a second plug is arranged on one side of the buffer cavity, the buffer cavity is a hollow and unobstructed cavity, and the inner diameter of the buffer cavity is larger than that of the air inlet.
In the preferred scheme, a first plug convenient for processing the heat exchange cavity is arranged on one side of the heat exchange cavity;
and a third plug is arranged on one side of the connecting position between the proportional balance valve and the buffer cavity.
In a preferred scheme, the proportional valve ports are arranged in 2-12 along the circumference, the valve port core plates are respectively 2-12, and at least two proportional valve ports are 90 degrees apart on the circumference.
The pressure reducing valve capable of accurately adjusting the flow, provided by the invention, can ensure the stability of the CNG output pressure by using electromagnetic force through the additionally arranged proportional balance valve, and can realize the automatic adjustment of the flow through adjusting the current. In a preferred scheme, a roughly rectangular proportional valve port is arranged, and a linear flow regulating curve can be obtained. The combustion efficiency of the engine is greatly improved. Through optimizing the structure, got rid of the structure of elastic membrane and spring among the prior art, combine the structure of solenoid valve and lateral part end cap, can further reduce the processing degree of difficulty of valve body. The invention can be used not only in CNG gas pressure reducing devices of automobiles and ships, but also in other fields, such as pressure reducing valves of liquefied petroleum gas or liquefied natural gas, which can accurately regulate flow.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a front view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a schematic structural view of the electromagnetic valve of the present invention.
Fig. 4 is a schematic view of the overall internal structure of the present invention.
Fig. 5 is a schematic structural diagram of a proportional balance valve according to the present invention.
Fig. 6 is a perspective view of a proportional valve spool of the present invention.
Fig. 7 is a perspective view of a valve seat of the present invention.
FIG. 8 is a graph of a fit of the current versus flow relationship of the present invention.
Fig. 9 is a schematic structural view of a pressure reducing valve in the prior art.
In the figure: the proportional balance valve comprises a proportional balance valve 1, a proportional valve wiring port 101, a proportional valve core 102, a buffer head 103, a proportional valve armature 104, a valve core rod 105, a sealing ring 106, a buffer cavity 107, a valve core plate 108, a valve port core plate 109, a valve seat plate 110, a valve seat riser 111, a proportional valve port 112, a through hole 113, a proportional valve housing 114, a proportional valve coil 115, an electromagnetic valve 2, an electromagnetic valve wiring port 21, a spring 22, an electromagnetic valve coil 23, an electromagnetic valve armature 24, an electromagnetic valve core 25, an electromagnetic valve housing 26, a decompression chamber 3, an air inlet 4, a first heat exchange medium interface 5, an air outlet 6, a first plug 7, a second heat exchange medium interface 8, a second plug 9 and a third plug 10.
Detailed Description
As shown in fig. 1 to 7, a pressure reducing valve capable of precisely adjusting the flow rate comprises an integrally cast valve body, in this case, the valve body is made of metal, such as aluminum alloy, cupronickel or stainless steel, and is integrally cast at one time, and an air inlet 4 and an air outlet 6 are arranged on the valve body, preferably, the air inlet 4 is internally threaded, and the air outlet 6 is externally threaded, so as to avoid wrong connection. A decompression chamber 3 is arranged between an air inlet 4 and an air outlet 6 in the valve body, the volume of the decompression chamber 3 is far larger than that of a pipeline of the air inlet 4, CNG gas is decompressed for the second time in the decompression chamber 3, an electromagnetic valve 2 is arranged at the air inlet 4, the structure of the electromagnetic valve 2 is shown in figure 3, an electromagnetic valve core 25 is movably sleeved in an electromagnetic valve sleeve 26, an electromagnetic valve armature 24 is arranged on the electromagnetic valve core 25, an electromagnetic valve coil 23 is arranged above the electromagnetic valve armature 24, a spring 22 is arranged between the electromagnetic valve core 25 and an electromagnetic shell, an air inlet hole with a smaller diameter is arranged on the side wall of the electromagnetic valve sleeve 26, and the air inlet hole. The bottom of the electromagnetic valve sleeve 26 is provided with an exhaust hole which is communicated with the decompression chamber 3, the electromagnetic valve sleeve 26 is fixedly connected with the valve body through threads, when the electromagnetic valve coil 23 is electrified, the electromagnetic valve spool 25 moves upwards to overcome the pressure of the spring to open a passage, and the scheme of a bent gas circuit is adopted to realize one-time decompression of CNG gas.
As shown in fig. 1 to 2 and 4 to 7, a proportional balance valve 1 is provided at an exhaust port 6, a proportional valve spool 102 driven by an electromagnet and a fixed valve seat are provided in the proportional balance valve 1, and a valve port cross section linearly changing according to axial displacement of the proportional valve spool 102 is formed between the proportional valve spool 102 and the valve seat. According to the scheme, the size of the cross section of the valve port can be accurately adjusted by adjusting the axial displacement of the valve core 102 of the proportional valve, so that the flow can be linearly adjusted. It should be noted that the valve ports in the prior art are mostly circular, and under the scheme, the cross section of circular communication and the corner of the valve core are in nonlinear corresponding relation, so that the flow is difficult to accurately adjust. Or as shown in fig. 9, the variation in the cross section of the opening between the spool and the valve seat is also non-linear, thus also making it very difficult to accurately regulate the flow rate.
In the proportional balance valve 1, as shown in fig. 4 to 7, the valve seat plate 110 is preferably provided at a position in the middle of the proportional valve housing 114 to divide the chamber in the proportional valve housing 114 into an intake portion and an exhaust portion, and in this example, in fig. 5, the upper portion is the exhaust portion and the lower portion is the intake portion, with the valve seat plate 110 being a boundary. The valve seat plate 110 is provided with a through hole 113, a valve seat vertical plate 111 which is approximately vertical to the valve seat plate 110 is arranged around an exhaust part of the through hole 113, and the valve seat vertical plate 111 is provided with a plurality of approximately vertical proportional valve ports 112;
the structure of the proportional valve spool 102 is: the valve core plate 108 is fixedly connected with the valve core rod 105 which is approximately vertical, the valve core plate 108 and the valve seat plate 110 form a sealing structure, and a valve port core plate 109 corresponding to the proportional valve port 112 is arranged on the valve core plate 108;
the valve core rod 105 passes through the through hole 113, preferably, the area of the gap between the through hole 113 and the valve core rod 105 is larger than the sum of the areas of all the proportional valve ports 112, and the valve port core plate 109 is slidably installed in the proportional valve ports 112;
a proportional valve armature 104 is fixedly arranged on the valve core rod 105, a proportional valve coil 115 is arranged on one side of the proportional valve armature 104 close to the valve core plate 108, and the proportional valve coil 115 is fixedly connected with a proportional valve housing 114. The valve seat and the proportional valve spool 102 in this example are preferably made of PVC or teflon, and the proportional valve armature 104 and the proportional valve coil 115 are both encapsulated in PVC or teflon. In the initial state, the valve core 102 and the valve seat of the proportional valve are in an open state, when the electromagnetic valve 2 is opened, the valve core plate 108 forms a seal with the valve seat plate 110 under the action of the pressure of the CNG gas, and the CNG gas cannot pass through the seal. When the proportional valve coil 115 is electrified, the armature of the armature 104 of the proportional valve drives the valve core rod 105 to move downwards, the valve core plate 108 and the valve seat plate 110 are opened, and the rectangular gap between the valve port core plate 109 and the proportional valve port 112 forms a valve port cross section, namely, the valve port opening is smaller when the valve core plate 108 is closer to the valve seat plate 110; conversely, the larger the valve port opening, the more linear the valve port variation can be due to the cross-section of the proportional valve port 112 being approximately rectangular. Fig. 8 is a graph fitting the current variation and the flow variation in the present invention, the vertical axis is current-flow, and the horizontal axis is time, wherein the current can obtain an almost flat flow variation curve with the graph structure of the dotted line in fig. 8. Preferably, in this example, the maximum current required to activate the proportional valve spool 102 is set, which is typically 120-130% of the actual current required. The valve port is opened to the maximum and then the proportion is adjusted.
In a preferred embodiment, the valve port core plate 109 and the side wall of the proportional valve port 112 form a sliding sealing structure, and a gap is provided between the valve core plate 108 and the inner wall of the valve seat riser 111. The solution means that the size of the valve port opening is determined by the position of the valve port core plate 109 at the proportional valve port 112, and is obtained by the through-flow cross section of a single valve port x the number of the proportional valve ports 112. Meanwhile, a guide rail slider structure is formed between the valve port core plate 109 and the proportional valve port 112.
In another alternative, the valve port core plate 109 and the inner wall of the valve seat riser 111 form a sliding sealing structure. That is, in this example, the size of the valve port opening is determined by the position of the valve port core plate 109 on the inner wall of the seat riser 111.
Preferably, as shown in fig. 6, a seal 106 is provided on the valve seat plate 110 or the core plate 108. The scheme improves the sealing effect.
Preferably, as shown in fig. 5, a buffer head 103 is provided at the end of the valve core rod 105 far from the valve core plate 108, a buffer chamber 107 is provided at the corresponding position of the proportional valve housing 114, and an airtight buffer structure is formed between the buffer head 103 and the buffer chamber 107. With this configuration, noise generated when the proportional balance valve 1 operates can be reduced, and mechanical impact between the valve body plate 108 and the valve seat plate 110 can also be reduced.
In a preferred embodiment, the intake port of the proportional balance valve 1 communicates with the decompression chamber 3, and the exhaust port of the proportional balance valve 1 communicates with the exhaust port 6.
In the preferred scheme, a heat exchange cavity is arranged on the outer wall of the decompression chamber 3, and a first heat exchange medium interface 5 and a second heat exchange medium interface 8 which are used for being connected with an engine cooling liquid pipeline are arranged on the decompression chamber 3. The heat exchange medium in the embodiment is engine cooling liquid, and the valve body is prevented from frosting by using the cooling temperature of the engine.
In a preferable scheme, a second plug 9 is arranged on one side of the decompression chamber 3, the decompression chamber 3 is a hollow unobstructed cavity, and the inner diameter of the decompression chamber 3 is larger than that of the air inlet 4.
In a preferred scheme, as shown in fig. 1 and 2, a first plug 7 which is convenient for processing the heat exchange cavity is further arranged on one side of the heat exchange cavity;
a third plug 10 is provided on the side of the connection between the proportional balance valve 1 and the decompression chamber 3. The plug structure that sets up is convenient for the processing and the assembly of the whole casting structure of valve body, reduces production and assembly degree of difficulty by a wide margin. Further preferably, a pressurized intake check valve is further provided in the decompression chamber 3, and the structure is the same as in the prior art. A pressure reducing structure is formed at 1, and CNG gas can be prevented from going backwards at 2.
In a preferred embodiment, the proportional valve ports 112 are circumferentially arranged in 2-12, the valve port core plate 109 is correspondingly arranged in 2-12, and at least two of the proportional valve ports 112 are circumferentially spaced at 90 °. Preferably, the number of proportional ports 112 is 3, 4, 5, or 6. The number of valve port core plates 109 is correspondingly 3, 4, 5, or 6.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention. The technical features in the above embodiments can be combined with each other without conflict.
Claims (6)
1. The utility model provides a but relief pressure valve of accurate regulated flow, it includes the whole cast valve body, is equipped with air inlet (4) and gas vent (6) on the valve body, is located to be equipped with between air inlet (4) and gas vent (6) decompression chamber (3) in the valve body, is equipped with solenoid valve (2), characterized by in air inlet (4): a proportional balance valve (1) is arranged at the exhaust port (6), a proportional valve core (102) driven by an electromagnet and a fixed valve seat are arranged in the proportional balance valve (1), and a valve port section which linearly changes along with the axial displacement of the proportional valve core (102) is formed between the proportional valve core (102) and the valve seat;
in the proportional balance valve (1), a valve seat plate (110) is arranged at the middle position of a proportional valve shell (114), a cavity in the proportional valve shell (114) is divided into an air inlet part and an air outlet part, a through hole (113) is formed in the valve seat plate (110), a valve seat vertical plate (111) approximately vertical to the valve seat plate (110) is arranged around the air outlet part of the through hole (113), and a plurality of approximately vertical proportional valve ports (112) are formed in the valve seat vertical plate (111);
the structure of the proportional valve spool (102) is as follows: the valve core plate (108) is fixedly connected with the valve core rod (105) which is approximately vertical, the valve core plate (108) and the valve seat plate (110) form a sealing structure, and a valve port core plate (109) corresponding to the proportional valve port (112) is arranged on the valve core plate (108);
the valve core rod (105) passes through the through hole (113), and the valve port core plate (109) is installed in the proportional valve port (112) in a sliding manner;
a proportional valve armature (104) is fixedly arranged on the valve core rod (105), a proportional valve coil (115) is arranged on one side, close to the valve core plate (108), of the proportional valve armature (104), and the proportional valve coil (115) is fixedly connected with a proportional valve shell (114);
the valve port core plate (109) and the side wall of the proportional valve port (112) form a sliding sealing structure, and a gap is formed between the valve core plate (108) and the inner wall of the valve seat vertical plate (111);
a seal ring (106) is provided on the valve seat plate (110) or the valve core plate (108).
2. The pressure reducing valve capable of precisely adjusting a flow rate as claimed in claim 1, wherein: a sliding sealing structure is formed between the valve port core plate (109) and the inner wall of the valve seat vertical plate (111).
3. The pressure reducing valve capable of precisely adjusting a flow rate as claimed in claim 1, wherein: the end of the valve core rod (105) far away from the valve core plate (108) is provided with a buffer head (103), the corresponding position of the proportional valve shell (114) is provided with a buffer cavity (107), and an airtight buffer structure is formed between the buffer head (103) and the buffer cavity (107).
4. The pressure reducing valve capable of precisely adjusting a flow rate as claimed in claim 1, wherein: the air inlet part of the proportional balance valve (1) is communicated with the decompression chamber (3), and the air outlet part of the proportional balance valve (1) is communicated with the air outlet (6).
5. The pressure reducing valve capable of precisely adjusting a flow rate as claimed in claim 1, wherein: a second plug (9) is arranged on one side of the decompression chamber (3), the decompression chamber (3) is a hollow unobstructed cavity, and the inner diameter of the decompression chamber (3) is larger than that of the air inlet (4);
a heat exchange cavity is arranged on the outer wall of the decompression chamber (3), and a first plug (7) convenient for processing the heat exchange cavity is arranged on one side of the heat exchange cavity;
and a third plug (10) is arranged on one side of the connecting position between the proportional balance valve (1) and the decompression chamber (3).
6. The pressure reducing valve capable of precisely adjusting a flow rate as claimed in claim 1, wherein: the proportional valve ports (112) are arranged in 2-12 along the circumference, the valve port core plates (109) are respectively arranged in 2-12, and at least two proportional valve ports (112) are arranged at a distance of 90 degrees on the circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910330572.9A CN110094279B (en) | 2019-04-23 | 2019-04-23 | Pressure reducing valve capable of accurately adjusting flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910330572.9A CN110094279B (en) | 2019-04-23 | 2019-04-23 | Pressure reducing valve capable of accurately adjusting flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110094279A CN110094279A (en) | 2019-08-06 |
| CN110094279B true CN110094279B (en) | 2020-02-21 |
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| CN201910330572.9A Active CN110094279B (en) | 2019-04-23 | 2019-04-23 | Pressure reducing valve capable of accurately adjusting flow |
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| CN111207127B (en) * | 2020-01-20 | 2025-04-01 | 江西液压件股份有限公司 | Buffer valve for wide flow control system and pressure reducing method thereof |
| CN111330095B (en) * | 2020-03-10 | 2024-09-20 | 广州医科大学附属第三医院（广州重症孕产妇救治中心、广州柔济医院） | Intelligent negative pressure suction control system |
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|---|---|---|---|---|
| CN2370170Y (en) * | 1999-03-18 | 2000-03-22 | 唐琳海 | Electric control flow regulation pressure reducing valve for gasous fuel automobile |
| JP2001324045A (en) * | 2000-05-17 | 2001-11-22 | Denso Corp | Solenoid valve |
| CN205896377U (en) * | 2016-06-29 | 2017-01-18 | 武汉洪斯德汽车有限公司 | A defroster for relief pressure valve |
| CN206280580U (en) * | 2016-12-20 | 2017-06-27 | 东风鸿泰武汉洁能汽车改装有限公司 | It is a kind of to be suitable to the CNG pressure-reducing valves of narrow space |
| CN107461537B (en) * | 2017-07-27 | 2024-05-31 | 南京槐燕归电子科技有限公司 | Safe and reliable compressed natural gas pressure reducing regulator for automobiles |
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2019
- 2019-04-23 CN CN201910330572.9A patent/CN110094279B/en active Active
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| Publication number | Publication date |
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| CN110094279A (en) | 2019-08-06 |
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Address after: 430035 No.2, floor 2, building 18, HSBC enterprise world, Changfeng Village, Changfeng Township, Qiaokou District, Wuhan City, Hubei Province Patentee after: WUHAN HONG SI DE AUTOMOTIVE Co.,Ltd. Address before: 430100 3rd floor, Building 2, Weidesheng Industrial Park, Fenghuangshan Development Zone, Caidian District, Wuhan City, Hubei Province Patentee before: WUHAN HONG SI DE AUTOMOTIVE Co.,Ltd. |
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Effective date of registration: 20220620 Address after: 430043 LingDian Electric Control Co., Ltd., No. 8 Qingshui Road, Jinyinhu street, Dongxihu District, Wuhan City, Hubei Province Patentee after: WUHAN LINGDIAN AUTOMOBILE ELECTRIC CONTROL SYSTEM CO.,LTD. Address before: 430035 No. 2, floor 2, building 18, HSBC enterprise world, Changfeng Village, Changfeng Township, Qiaokou District, Wuhan City, Hubei Province Patentee before: WUHAN HONG SI DE AUTOMOTIVE Co.,Ltd. |