New energy fuel proportional valve

Abstract

The utility model relates to the technical field of fuel injection systems, in particular to a new energy fuel proportional valve which comprises an electromagnetic valve assembly unit, a separating plate and a proportional valve assembly unit. The separating plate is used for separating a cavity area formed between the electromagnetic valve assembly unit and the proportional valve assembly unit; the electromagnetic valve shell wraps the electromagnetic valve sleeve, the electromagnetic valve element is assembled in an inner cavity of the electromagnetic valve sleeve and moves in the axial direction of the electromagnetic valve sleeve, and the proportional valve sleeve is installed in the proportional valve body in an interference mode to form a fuel inlet annular groove and a fuel outlet annular groove. The proportional valve element is assembled in an inner cavity of the proportional valve sleeve, the pressure adjusting screw penetrates through the proportional valve body, and the end of the pressure adjusting screw is connected with the elastic element and used for adjusting the pre-tightening force of the elastic element. The new energy fuel proportional valve aims at solving the problem that new energy fuel corrodes an electromagnetic assembly after leaking through a gap, and consequently the proportional valve fails.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injection systems, and particularly relates to a new energy fuel proportional valve. Background Art

[0002] With the gradual strictness of global carbon emission regulations, new energy fuels are gradually coming into people's view. Among them, ammonia fuel and methanol fuel are two popular fuels in new energy fuels at present, and have the advantages of being renewable, zero-carbon / low-carbon emissions, etc. In the design of traditional proportional valves, the fuel leaking through the clearance of the coupling parts will exist inside the solenoid valve body and the proportional valve body for a long time, and only the leaking fuel is recovered by the oil return port. However, due to the certain corrosiveness of the new fuel, the fuel accumulated in the cavity for a long time is easy to corrode the copper, zinc, aluminum and other components in the solenoid valve, resulting in premature failure of the solenoid valve and affecting the fuel flow control effect. Secondly, new energy fuels have the characteristic of easy vaporization, and the fuel leaking into the cavity is easy to cause imbalance of the axial force at both ends of the proportional valve and affect the opening and closing of the solenoid valve. In addition, impurities such as CO2, O2, S ions, Cl ions and water inevitably exist in the new fuel. After the gas-liquid phase change of the fuel, a large amount of heat will be absorbed, resulting in a large thermal deviation of each component of the proportional valve, and even icing, affecting its fit tolerance and damaging the mechanical performance. Moreover, the non-condensable gases (CO2, O2) precipitated after the phase change continuously accumulate at the slit inside the proportional valve cavity, causing strong stress corrosion and electrochemical corrosion, resulting in problems such as perforation of the proportional valve and failure of the structural strength.

[0003] Therefore, the inventor provides a new energy fuel proportional valve. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] The embodiment of the utility model provides a new energy fuel proportional valve, which solves the technical problem that the electromagnetic component is corroded after the new energy fuel leaks through the clearance, resulting in the failure of the proportional valve. At the same time, it avoids the problems of structural failure and fit imbalance of parts caused by excessive temperature difference due to the absorption of a large amount of heat during the gas-liquid phase change of the new energy fuel; and avoids the technical problems of stress corrosion and electrochemical corrosion caused by the aggregation of impurity ions and non-condensable gases in the new energy fuel in the slit, resulting in perforation of the proportional valve and failure of the structural strength.

[0006] (2) Technical Solutions

[0007] The utility model provides a new energy fuel proportional valve, which includes a solenoid valve component unit, a separation plate and a proportional valve component unit. The solenoid valve component unit is connected to the proportional valve component unit, and the separation plate is used to separate the cavity area formed between the solenoid valve component unit and the proportional valve component unit; wherein,

[0008] The solenoid valve assembly unit includes a solenoid valve housing, a solenoid valve spool, and a solenoid valve sleeve. The solenoid valve housing is wrapped around the solenoid valve sleeve. Both the solenoid valve housing and the solenoid valve sleeve are connected to the proportional valve assembly unit. The solenoid valve spool is assembled in the inner cavity of the solenoid valve sleeve and moves along the axial direction of the solenoid valve sleeve.

[0009] The proportional valve assembly unit includes a proportional valve spool, a proportional valve sleeve, an elastic element, a proportional valve body, and a pressure regulating screw. The proportional valve sleeve is press-fitted inside the proportional valve body to form a fuel inlet annular groove and a fuel outlet annular groove. The proportional valve spool is assembled in the inner cavity of the proportional valve sleeve. One end of the proportional valve spool is connected to the solenoid valve spool, and the other end of the proportional valve spool is connected to the elastic element. The proportional valve sleeve is provided with circumferential holes at the part located at the fuel inlet annular groove. The internal through hole of the proportional valve spool communicates with the circumferential holes. The pressure regulating screw passes through the proportional valve body and its end is connected to the elastic element and is used to adjust the pre-tightening force of the elastic element. The valve rod of the solenoid valve spool passes through the separation plate and is used to push the valve rod of the proportional valve spool.

[0010] Further, one end of the solenoid valve sleeve where it is connected to the proportional valve assembly unit is provided with an annular groove, and a through hole is provided in the annular groove.

[0011] Further, two annular grooves distributed vertically combine to form an annular cavity. The annular cavity is distributed with solenoid valve sleeve fluid passages pointing towards the axis. The normal direction of the solenoid valve sleeve fluid passages points to the inside of the solenoid valve side cavity area formed by the assembly of the solenoid valve assembly unit and the proportional valve assembly unit.

[0012] Further, the two cavity areas of the solenoid valve side cavity area and the proportional valve side cavity area of the proportional valve assembly unit are connected through the separation plate flow passage on the separation plate.

[0013] Further, an inlet flow passage for high-pressure fluid is provided in the upper part of the proportional valve body. The two ends of the inlet flow passage are respectively communicated with the annular cavity and the high-pressure inlet. An outlet flow passage for low-pressure fluid return is provided in the lower part of the proportional valve body. The two ends of the outlet flow passage are respectively communicated with the low-pressure outlet and the inner cavity of the proportional valve sleeve where the elastic element is located.

[0014] Further, two transverse holes are provided at the end of the proportional valve body. Both of the two transverse holes are communicated with a longitudinal hole vertically pointing to the inside of the proportional valve body.

[0015] Further, the solenoid valve sleeve is fastened to the proportional valve body, and the separation plate is installed on the solenoid valve sleeve or the separation plate is installed on the solenoid valve sleeve.

[0016] Further, a plurality of non-uniformly distributed shaft holes are formed in the separation plate.

[0017] Further, the proportional valve sleeve is provided with symmetric window holes at the fuel outlet annular groove for controlling the flow rate of the proportional valve component unit.

[0018] Further, the proportional valve body is provided with a fuel inlet, a first fuel inlet hole and a fuel outlet, and the proportional valve sleeve is provided with a second fuel inlet hole; wherein,

[0019] The new energy fuel sequentially enters the proportional valve coupling annular groove formed by the proportional valve spool and the proportional valve sleeve through the fuel inlet, the first fuel inlet hole, the fuel inlet annular groove and the second fuel inlet hole;

[0020] When the axial movement of the proportional valve spool exposes the window hole, the window hole communicates with the proportional valve coupling annular groove, and the new energy fuel enters the fuel inlet annular groove through the window hole and then flows out of the proportional valve component unit through the fuel outlet.

[0021] (3) Beneficial effects

[0022] In summary, the present utility model forms a high and low pressure difference between the solenoid valve component unit and the proportional valve component unit, realizes the self-sealing of the solenoid valve component unit, and avoids the new energy fuel from entering the solenoid valve cavity to corrode metal materials such as coils; the fluid medium circulating in the internal flow path can provide the heat absorbed by the phase change of the new energy fuel after passing through the gap leakage, and avoid the sharp temperature drop in the internal environment of the proportional valve, resulting in thermal deviation imbalance of the proportional valve, icing of internal and external key structures, etc. Description of the drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments of the present utility model will be briefly introduced below. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a structural cross-sectional view of a first perspective of a new energy fuel proportional valve provided by an embodiment of the present utility model;

[0025] Figure 2 is Figure 1 an enlarged structural schematic diagram of part A in

[0026] Figure 3It is a structural cross-sectional view of a new energy fuel proportional valve provided by an embodiment of the present utility model from a second perspective;

[0027] Figure 4 It is a schematic diagram of an integrated circulation treatment system of a new energy fuel proportional valve provided by an embodiment of the present utility model.

[0028] In the figure:

[0029] 1 - Solenoid valve housing; 101 - Annular cavity; 102 - Solenoid valve side cavity area; 2 - Solenoid valve spool; 3 - Solenoid valve sleeve; 301 - Solenoid valve sleeve fluid passage; 302 - Solenoid valve spool cavity; 303 - Solenoid valve spool gap; 4 - Separation plate; 401 - Separation plate flow channel; 5 - Proportional valve spool; 501 - Proportional valve spool fluid passage; 502 - Proportional valve side cavity area; 503 - Proportional valve mating part ring groove; 6 - Proportional valve sleeve; 601 - Second fuel inlet hole; 602 - Proportional valve sleeve inner cavity; 603 - Window hole; 7 - Elastic element; 8 - Proportional valve body; 801 - Inlet flow channel; 802 - Outlet flow channel; 803 - Fuel inlet; 804 - First fuel inlet hole; 805 - Fuel inlet ring groove; 806 - Fuel outlet ring groove; 807 - Fuel outlet; 9 - Pressure regulating screw; 10 - High-pressure inlet; 11 - Low-pressure outlet; 12 - First process plug; 13 - Second process plug; 14 - Multifunctional detection sensor; 15 - Separation filter; 16 - Heating module; 17 - Circulation pump. Specific embodiments

[0030] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principle of the present utility model, but cannot be used to limit the scope of the present utility model, that is, the present utility model is not limited to the described embodiments, and covers any modifications, substitutions, and improvements of parts, components, and connection methods without departing from the spirit of the present utility model.

[0031] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present application in detail with reference to the drawings and embodiments.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Figure 1 This is a schematic diagram of the structure of a new energy fuel proportional valve provided by the embodiment of the utility model, see Figures 1-3 As shown, the proportional valve may include a solenoid valve assembly unit, a separation plate 4 and a proportional valve assembly unit, wherein the solenoid valve assembly unit is connected to the proportional valve assembly unit, and the separation plate 4 is used to separate the cavity area formed between the solenoid valve assembly unit and the proportional valve assembly unit. The solenoid valve assembly unit includes a solenoid valve housing 1, a solenoid valve core 2 and a solenoid valve sleeve 3, wherein the solenoid valve housing 1 is wrapped in the solenoid valve sleeve 3, the solenoid valve housing 1 and the solenoid valve sleeve 3 are both connected to the proportional valve assembly unit, and the solenoid valve core 2 is assembled in the inner cavity of the solenoid valve sleeve 3 and moves along the axial direction of the solenoid valve sleeve 3. The proportional valve assembly unit includes a proportional valve core 5, a proportional valve sleeve 6, an elastic element 7, a proportional valve body 8 and a pressure regulating screw 9. The proportional valve sleeve 6 is interference-fitted inside the proportional valve body 8 to form a fuel inlet annular groove 805 and a fuel outlet annular groove 806; the proportional valve core 5 is assembled in the inner cavity of the proportional valve sleeve 6, one end of the proportional valve core 5 is connected to the solenoid valve core 2, and the other end of the proportional valve core 5 is connected to the elastic element 7; the proportional valve sleeve 6 is provided with a circumferential hole in the portion located at the fuel inlet annular groove 805, and the internal through hole of the proportional valve core 5 is connected to the circumferential hole; the pressure regulating screw 9 is penetrated in the proportional valve body 8 and its end is connected to the elastic element 7 and is used to adjust the preload force of the elastic element 7, and the valve stem of the solenoid valve core 2 is penetrated in the separation plate 4 and is used to push the valve stem of the proportional valve core 5.

[0035] In the above-mentioned embodiment, a high and low pressure difference is formed between the solenoid valve assembly unit and the proportional valve assembly unit, so that the solenoid valve assembly unit is self-sealed, and the new energy fuel is prevented from entering the solenoid valve cavity to corrode metal materials such as the coil. The new energy fuel leaking from the gap between the mating parts flows out of the proportional valve along the internally designed flow channel, and the functions of abnormal fuel leakage detection, fuel recovery, purification and impurity removal can be realized in the comprehensive circulation processing system unit. The fluid medium circulating in the internal flow channel can provide the heat absorbed by the new energy fuel after phase change after leakage through the gap, so as to avoid a sharp drop in the temperature of the internal environment of the proportional valve, resulting in thermal deviation imbalance of the proportional valve, icing of the internal and external key structures, etc. The fluid medium circulating in the internal flow channel takes away impurities such as CO2, SO2, O2 that may exist in the new energy fuel, and reduces the intensity of stress corrosion and electrochemical corrosion that occur inside the proportional valve.

[0036] Among them, the separation plate 4 is used to separate the cavity area formed by the solenoid valve component unit and the proportional valve component unit, and allows the valve stem of the solenoid valve spool 2 to smoothly push the valve stem of the proportional valve spool 5; the cavity area on the side biased towards the solenoid valve is the solenoid valve side cavity area 102, and the cavity area on the side biased towards the proportional valve is the proportional valve side cavity area 502; the two cavity areas of the solenoid valve side cavity area 102 and the proportional valve side cavity area 502 are connected by the separation plate flow channel 401 on the separation plate 4; after the proportional valve is opened, the solenoid valve spool 2 pushes the proportional valve spool 5 to move rightward, and the annular hole for the solenoid valve spool 2 to pass through inside the separation plate 4 also communicates with the separated cavity areas on both sides. That is, the high-pressure fluid in the solenoid valve side cavity area 102 can enter the proportional valve side cavity area 502.

[0037] Specifically, as Figure 1 shown, the proportional valve spool 5 and the proportional valve sleeve 6 are assembled and installed to form a proportional valve pair. The valve core end face at the left end of the proportional valve pair is connected to the proportional valve spool 5, and the right valve core end face is connected to the elastic element 7. The pressure regulating screw 9 is used to adjust the pre-tightening force of the elastic element 7 and control the opening and closing ratio of the proportional valve.

[0038] As an alternative implementation manner, one end of the solenoid valve sleeve 3 connected to the proportional valve component unit is provided with a ring groove, and a through hole is provided in the ring groove. Two ring grooves distributed up and down form an annular cavity 101. The solenoid valve sleeve fluid passages 301 pointing to the axis are distributed on the annular cavity 101, and the normal direction of the solenoid valve sleeve fluid passages 301 points to the inside of the solenoid valve side cavity area 102 formed by the assembly of the solenoid valve component unit and the proportional valve component unit.

[0039] As an alternative implementation manner, the two cavity areas of the solenoid valve side cavity area 103 and the proportional valve side cavity area 201 of the proportional valve component unit are connected by the separation plate flow channel 401 on the separation plate 4.

[0040] As an alternative implementation manner, an inlet flow channel 801 for high-pressure fluid is provided at the upper part of the proportional valve body 8. The two ends of the inlet flow channel 801 are respectively connected to the annular cavity 101 and the high-pressure inlet 10; an outlet flow channel 802 for low-pressure fluid return is provided at the lower part of the proportional valve body 8. The two ends of the outlet flow channel 802 are respectively connected to the low-pressure outlet 11 and the inner cavity of the proportional valve sleeve 6 where the elastic element 7 is located. Specifically, there are internal threads and internal ring grooves at the connection between the proportional valve body 8 and the solenoid valve sleeve 3. Two horizontal holes, one short and one long, are drilled leftward from the right end face of the proportional valve body 8. The long hole is the inlet flow channel 801, and the short hole is the outlet flow channel 802; both horizontal holes are connected to the vertical hole pointing vertically into the valve body, and the process machining hole of the vertical hole outside the valve body is sealed by a plug.

[0041] As an alternative embodiment, two transverse holes are provided at the end of the proportional valve body 8, and both transverse holes communicate with a longitudinal hole vertically pointing into the proportional valve body 8. The solenoid valve sleeve 3 is fastened to the proportional valve body 8, and the separation plate 4 is installed on the solenoid valve sleeve 3 or the separation plate 4 is installed on the proportional valve sleeve 6. Further, a plurality of non-uniformly distributed shaft holes are provided on the separation plate 4, the number of shaft holes on the side far from the inlet flow channel 801 is reduced, the self-sealing effect is enhanced, and new energy fuel is prevented from flowing back from the proportional valve side cavity area at the left end to the solenoid valve side cavity area.

[0042] As an alternative embodiment, the proportional valve sleeve 6 is provided with symmetric window holes 601 at the fuel outlet ring groove for controlling the flow rate of the fluid discharged from the proportional valve component unit.

[0043] As an alternative embodiment, the proportional valve body 8 is provided with a fuel inlet 803, a first fuel inlet hole 804 and a fuel outlet 807, and the proportional valve sleeve 6 is provided with a second fuel inlet hole 601. The new energy fuel sequentially enters the proportional valve spool 5 and the proportional valve sleeve 6 to form a proportional valve coupling ring groove 503 through the fuel inlet 803, the fuel first fuel inlet hole 804, the fuel inlet ring groove 805 and the second fuel inlet hole 601; when the axial movement of the proportional valve spool 5 exposes the window hole 603, the window hole 603 communicates with the proportional valve coupling ring groove 202, and the new energy fuel enters the fuel inlet ring groove 806 through the window hole 603 and then discharges from the fuel outlet 807 out of the proportional valve component unit.

[0044] Specifically, there are two fluid passages of different media on the proportional valve component unit. The first one is the fluid passage required by the comprehensive circulation treatment system. The longer flow passage on the upper side of the proportional valve body 8 is the inlet flow passage 801 of high-pressure fluid, which is connected to the high-pressure inlet 10. Then, the inlet flow passage 801 of high-pressure fluid is communicated with the annular cavity 101, and the machining hole formed on the outside of the proportional valve body 8 is sealed by the first process plug 12, so as to ensure that the fluid entering from the high-pressure inlet 10 does not leak after flowing through the inlet flow passage 801 and smoothly enters the annular cavity 101 formed by the solenoid valve sleeve 3 and the proportional valve body 8. The shorter flow passage on the lower side of the proportional valve body 8 is the outlet flow passage 802 for the return of low-pressure fluid, which is connected to the low-pressure outlet 11. Similarly, the outlet flow passage 802 for the return of low-pressure fluid is communicated with the inner cavity 602 of the proportional valve sleeve where the elastic element 7 is located, and the machining hole formed is sealed by the second process plug 12 to ensure that the low-pressure fluid smoothly flows out of the proportional valve from the low-pressure outlet 11. The flow passage of the proportional valve spool fluid passage 501 includes the hollow passage of the valve stem of the proportional valve spool 5 and the hole passage connecting the valve stem on the side of the solenoid valve and the proportional valve side cavity area 502, so as to ensure that the high-pressure fluid entering from the high-pressure inlet 10 flows into the inner cavity 602 of the proportional valve sleeve for the recovery of low-pressure fluid through the proportional valve spool fluid passage 501.

[0045] Another fluid passage of the proportional valve assembly unit is a new energy fuel fluid passage, which is used to control the flow rate of the new energy fuel drainage. The new energy fuel enters the fuel inlet annular groove 805 from the fuel inlet 803 through the first fuel inlet hole 804 of the fuel. Then, the fuel in the fuel inlet annular groove 805 enters the proportional valve coupling annular groove 503 formed by the proportional valve spool and the proportional valve sleeve through the second fuel inlet hole 601 on the proportional valve sleeve 6. At this time, the proportional valve coupling annular groove 503 is filled with the new energy fuel at a relatively high pressure. In order to ensure that the electromagnetic valve thrust can smoothly push the proportional valve spool 5 to move in the proportional valve sleeve 6, there is a certain coupling gap, that is, inevitably, the new energy fuel will leak from the coupling gap into the proportional valve side cavity area 502 and the inner cavity 602 of the proportional valve sleeve. When the proportional valve spool 5 axially moves to expose the window hole 603 for proportional valve drainage, the window hole 603 communicates with the proportional valve coupling annular groove 503, and the new energy fuel enters the fuel outlet annular groove 806 through the window hole 603, and then drains out of the proportional valve from the fuel outlet 807.

[0046] The integrated circulation processing system unit, such as Figure 4 shown, mainly consists of a multi-functional detection sensor 14, a separation filter 15, a heating module 16, a circulation pump 17, etc. The multi-functional detection sensor 14 can detect parameters such as the fuel composition ratio, pressure, temperature, speed, etc.; the separation filter 15 separates fuel components, moisture, non-condensable gases, etc. in the medium, and is also provided with a safety valve and an emergency fuel return port; the heating module 16 can heat the flowing medium at a lower temperature according to the data of the new fuel multi-functional detection sensor to keep the proportional valve operating within the working temperature range; the circulation pump 17 is used to pressurize the flowing medium and circulate the flowing medium. Optionally, the flowing medium of the integrated circulation processing system unit can be flowing media such as air, high-purity nitrogen, silicone oil, diesel, alcohol, ether, etc. The functions can include abnormal leakage detection and treatment, purification and treatment of the flowing medium such as water removal, oxygen removal, and impurity removal.

[0047] The working principle of the new energy fuel proportional valve is as follows:

[0048] Example of operation regulation of the proportional valve fuel flow path

[0049] such as Figures 1-4As shown, the initial position of the proportional valve spool 5 is the fully closed state of the window hole 603. The fuel inlet 803 is connected to the pressure regulating pipeline, and the new energy fuel sequentially passes through the first fuel inlet hole 804, the fuel inlet ring groove 805, and the second fuel inlet hole 601 and enters the proportional valve coupling ring groove 503. At this time, the fuel inlet 803, the first fuel inlet hole 804, the fuel inlet ring groove 805, the second fuel inlet hole 601, and the proportional valve coupling ring groove 503 are all filled with the new energy fuel and have similar pressures. When an external signal inputs to regulate the opening of the proportional valve, the coil in the solenoid valve is energized, and the solenoid valve spool 2 pushes the proportional valve spool 5 to move rightward, compressing the elastic element 7 (specifically, a spring can be used), exposing part of the window hole 603, and the new energy fuel flows out from the proportional valve coupling ring groove 503 through the window hole 603 and the fuel outlet ring groove 806 and exits from the fuel outlet 807. When an external signal inputs to fully open the proportional valve, that is, the solenoid valve spool 2 pushes the proportional valve spool 5 to expose the complete window hole 603, the discharge flow rate of the new energy fuel increases. When an external signal outputs to fully close the proportional valve, the solenoid valve is de-energized, and the spring 7 returns to push the proportional valve spool 5 and the solenoid valve spool 2 to move leftward to close the window hole 603. The pressure regulating screw 9 can adjust the magnitude of the pre-tightening force of the initial spring, thereby controlling the closing speed of the proportional valve and the maximum opening and closing of the proportional valve.

[0050] Example of the flow process of the proportional valve circulation channel

[0051] As Figures 1-4As shown in the figure, in the example description, the second fluid flow path is used to process new energy fuels (taking ammonia fuel as an example) for the clearance leakage of the proportional valve couple, and the fluid medium is taken as nitrogen. When the proportional valve is working normally, the liquid ammonia fuel exists in the ring groove 503 of the proportional valve couple, and the ammonia fuel will slowly leak from the couple clearance into the proportional valve side cavity areas 502 at both ends and the inner cavity 602 of the proportional valve sleeve. High-pressure nitrogen is introduced into the high-pressure inlet 10 and flows into the annular cavity 101 through the inlet flow path 801. The high-pressure nitrogen in the annular cavity 101 then enters the solenoid valve side cavity area 102 through the solenoid valve sleeve fluid passage 301 on the annular cavity 101. At this time, blocked by the separation plate 4, the cavities of the solenoid valve component unit are filled with nitrogen at a relatively high pressure, including the solenoid valve spool cavity 302 and the solenoid valve spool gap 303. After the high-pressure nitrogen flows through the separation plate flow path 401 on the separation plate 4, a large pressure drop will occur, that is, there is a large pressure difference between the solenoid valve side cavity area 102 and the proportional valve side cavity area 502. The ammonia fuel leaked into the proportional valve side cavity area 502 is difficult to enter the solenoid valve side cavity area 102 under the action of the pressure difference. Therefore, the separation plate 4 helps the solenoid valve component unit to form a self-sealing effect here, and it is difficult for the ammonia fuel to invade the solenoid valve cavity, avoiding the corrosion of the metal coil in the cavity. Then, the nitrogen entering the proportional valve side cavity area 502 and the ammonia fuel leaked from the proportional valve couple are mixed and pass through the proportional valve spool fluid passage 108 and enter the inner cavity 602 of the proportional valve sleeve. The mixed nitrogen and ammonia fuel continue to mix with the leaked ammonia fuel in the inner cavity 602 of the proportional valve sleeve, and then the mixer flows out from the low-pressure outlet 11 through the outlet flow path 802 under the drive of the pressure difference. There is no ammonia fuel leaked from the couple in the solenoid valve side cavity area 102, thus avoiding corrosion.

[0052] When the proportional valve is working normally, under the throttling action of the couple clearance, the ammonia fuel leaked from the couple clearance is often in a gaseous state in the proportional valve side cavity area 502 and the inner cavity 602 of the proportional valve sleeve. The nitrogen cycle can quickly take the gaseous ammonia fuel out of the proportional valve, and it can also meet the phase change heat absorption of the ammonia fuel. When the proportional valve has abnormal leakage, a large amount of liquid ammonia fuel leaks into the proportional valve side cavity area 502 and the inner cavity 602 of the proportional valve sleeve. The nitrogen pressure at the high-pressure inlet 10 is quickly increased, and the back pressure in the proportional valve cavity is increased to avoid the vaporization of the ammonia fuel, thus providing sufficient operation time for the operator to respond and increasing the safety of the new energy fuel proportional valve.

[0053] Working example of the proportional valve comprehensive circulation treatment system

[0054] As Figures 1-4 shown, the working medium of the comprehensive circulation treatment system in this example is nitrogen, and the working fuel of the proportional valve is ammonia fuel. The flow process from the high-pressure inlet 10 to the low-pressure outlet 11 is as Figure 3As shown, the mixed gas recovered from the low-pressure outlet 11 is first detected by the multi-functional detection sensor 14 for parameters such as the concentration of ammonia fuel, the temperature and pressure of the mixed gas. Then, it is introduced into the separation filter 15, aiming at the corrosion mechanism of ammonia fuel.

[0055] Optionally, when recovering and separating the mixed gas, it can be chosen whether to remove ammonia fuel. Mainly, impurities such as water, O2, and CO2 in the mixed gas need to be removed.

[0056] When the ammonia fuel component is not removed, the mixed gas is introduced into the heating module 16. If the gas temperature detected by the multi-functional detection sensor 14 is too low, heat exchange or (and) auxiliary heating treatment can be carried out here. The mixed gas passing through the heating module 16 is pressurized by the circulation pump 17 and introduced into the high-pressure inlet 10, thus completing a cycle of treatment.

[0057] When abnormal leakage occurs in the clearance of the proportional valve couple, the multi-functional sensor 14 will detect a higher pressure and a higher concentration of ammonia fuel. When the amount of abnormal leakage is small, to avoid the failure of the self-sealing system formed by the solenoid valve assembly, the pressure pumped out by the circulation pump can be increased; when the amount of abnormal leakage is large, the separation filter 15 will no longer separate, the valve connecting the heating module 16 is closed, and the mixed gas is directly returned to the fuel tank. The circulation pump 17 is supplied with nitrogen source by an external standby nitrogen source, and the pressure of the high-pressure inlet 10 is increased to ensure that the ammonia fuel leaking abnormally inside the proportional valve does not vaporize, thus ensuring the safety of the proportional valve.

[0058] The selection basis of the circulating medium for the comprehensive circulation treatment system is determined according to the pressure at the fuel inlet end of the proportional valve. When the inlet fuel pressure of the proportional valve is relatively large, a liquid fluid medium such as diesel, alcohol, ether, and lubricating oil can be selected. The liquid fluid medium can greatly reduce the leakage of new energy fuel from the clearance of the couple, achieve the sealing effect, and can also avoid local pressure over-explosion caused by the gas-liquid phase change of the leaked new energy fuel. When the inlet fuel pressure of the proportional valve is relatively small, a gaseous fluid medium such as N2, Ar, and air can be selected. The gaseous fluid medium is more convenient to obtain and has less influence on the torque requirement of the solenoid valve.

[0059] It should be clear that each embodiment in this specification is described in a progressive manner. For the same or similar parts between each embodiment, reference can be made to each other. The key point of each embodiment is to illustrate the differences from other embodiments. The present utility model is not limited to the specific steps and structures described above and shown in the figures. And, for the sake of brevity, the detailed description of known method technologies is omitted here.

[0060] The above are only embodiments of the present application and do not limit the present application. Without departing from the scope of the present utility model, various modifications and changes can be made to the present application for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A new energy fuel proportional valve, characterized in that: It comprises a solenoid valve assembly unit, a separation plate (4) and a proportional valve assembly unit, wherein the solenoid valve assembly unit is connected to the proportional valve assembly unit, and the separation plate (4) is used to separate a cavity area formed between the solenoid valve assembly unit and the proportional valve assembly unit; wherein: The solenoid valve assembly unit comprises a solenoid valve housing (1), a solenoid valve core (2) and a solenoid valve sleeve (3); the solenoid valve housing (1) is wrapped around the solenoid valve sleeve (3); the solenoid valve housing (1) and the solenoid valve sleeve (3) are both connected to the proportional valve assembly unit; the solenoid valve core (2) is assembled in the inner cavity of the solenoid valve sleeve (3) and moves along the axial direction of the solenoid valve sleeve (3); The proportional valve assembly unit comprises a proportional valve core (5), a proportional valve sleeve (6), an elastic element (7), a proportional valve body (8) and a pressure regulating screw (9); the proportional valve sleeve (6) is interference-mounted inside the proportional valve body (8) to form a fuel inlet annular groove (805) and a fuel outlet annular groove (806); the proportional valve core (5) is assembled in the inner cavity of the proportional valve sleeve (6); one end of the proportional valve core (5) is connected to the solenoid valve core (2); the other end of the proportional valve core (5) is connected to the solenoid valve core (2); One end is connected to the elastic element (7); the proportional valve sleeve (6) is provided with a circumferential hole at the portion located at the fuel inlet ring groove (805), and the internal through hole of the proportional valve core (5) is connected to the circumferential hole; the pressure regulating screw (9) is passed through the proportional valve body (8) and its end is connected to the elastic element (7) and is used to adjust the preload force of the elastic element (7); the valve stem of the solenoid valve core (2) is passed through the separation plate (4) and is used to push the valve stem of the proportional valve core (5).

2. The new energy fuel proportional valve according to claim 1, characterized in that: An annular groove is provided at one end of the solenoid valve sleeve (3) where it is connected to the proportional valve assembly unit, and a through hole is provided in the annular groove.

3. The new energy fuel proportional valve according to claim 1, characterized in that: The two annular grooves distributed up and down are combined to form an annular cavity (101), and an electromagnetic valve sleeve fluid passage (301) pointing to the axis is distributed on the annular cavity (101), and the normal direction of the electromagnetic valve sleeve fluid passage (301) points to the inside of the electromagnetic valve side cavity area (102) formed by assembling the electromagnetic valve assembly unit and the proportional valve assembly unit.

4. The new energy fuel proportional valve according to claim 3, characterized in that: The two cavity areas of the solenoid valve side cavity area (102) and the proportional valve side cavity area (502) of the proportional valve assembly unit are connected via a separation plate flow channel (401) on the separation plate (4).

5. The new energy fuel proportional valve according to claim 3, characterized in that: The upper portion of the proportional valve body (8) is provided with an inlet flow channel (801) for high-pressure fluid, and the two ends of the inlet flow channel (801) are respectively connected to the annular cavity (101) and the high-pressure inlet (10); the lower portion of the proportional valve body (8) is provided with an outlet flow channel (802) for low-pressure fluid reflux, and the two ends of the outlet flow channel (802) are respectively connected to the low-pressure outlet (11) and the inner cavity of the proportional valve sleeve (6) where the elastic element (7) is located.

6. The new energy fuel proportional valve according to claim 1, characterized in that: Two transverse holes are provided at the end of the proportional valve body (8), and the two transverse holes are both connected to a longitudinal hole vertically pointing to the inside of the proportional valve body (8).

7. The new energy fuel proportional valve according to claim 1, characterized in that: The solenoid valve sleeve (3) is fastened to the proportional valve body (8), and the separation plate (4) is mounted on the solenoid valve sleeve (3) or the separation plate (4) is mounted on the proportional valve sleeve (6).

8. The new energy fuel proportional valve according to claim 1, characterized in that: The separation plate (4) is provided with a plurality of axial holes which are unevenly distributed.

9. The new energy fuel proportional valve according to claim 1, characterized in that: The proportional valve sleeve (6) is provided with symmetrical window holes (603) at the fuel outlet ring groove, which are used to control the leakage flow rate of the proportional valve assembly unit.

10. The new energy fuel proportional valve according to claim 9, characterized in that: The proportional valve body (8) is provided with a fuel inlet (803), a first fuel inlet hole (804) and a fuel outlet (807), and the proportional valve sleeve (6) is provided with a second fuel inlet hole (601); wherein, The new energy fuel enters the proportional valve coupler annular groove (503) formed by the proportional valve core (5) and the proportional valve sleeve (6) in sequence through the fuel inlet (803), the first fuel inlet hole (804), the fuel inlet annular groove (805) and the second fuel inlet hole (601); When the proportional valve core (5) moves axially to expose the window hole (603), the window hole (603) is connected to the proportional valve pair annular groove (503), and the new energy fuel enters the fuel inlet annular groove (805) through the window hole (603), and then flows out of the proportional valve assembly unit from the fuel outlet (807).

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