CN111022716B - Differential pressure regulating valve and reactant supply system for fuel cell - Google Patents
Differential pressure regulating valve and reactant supply system for fuel cell Download PDFInfo
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- CN111022716B CN111022716B CN201911134858.6A CN201911134858A CN111022716B CN 111022716 B CN111022716 B CN 111022716B CN 201911134858 A CN201911134858 A CN 201911134858A CN 111022716 B CN111022716 B CN 111022716B
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- knob
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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
- F16K17/06—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 with special arrangements for adjusting the opening pressure
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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
- F16K17/0473—Multiple-way safety valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
- F16K17/0486—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 with mechanical actuating means
Abstract
The invention belongs to the technical field of automobile fuel cells, and discloses a differential pressure regulating valve and a reactant supply system of a fuel cell, wherein the differential pressure regulating valve comprises a main valve body, a plug, a valve needle and a regulating assembly, a valve needle moving cavity and a control cavity are arranged in the main valve body, and first vent holes are formed in two ends of the valve needle moving cavity; the plug is arranged on the outer side of the first vent hole and is provided with a second vent hole; the valve needle is movably arranged in the valve needle moving cavity along the transverse direction, and two ends of the valve needle protrude from the first vent hole and selectively seal the second vent hole; the regulating assembly comprises a regulating slide block and an elastic shifting sheet, and a reactant supply system of the fuel cell is provided with the differential pressure regulating valve. Has the advantages that: the first end of the elastic shifting piece is different from the distance between the first end of the elastic shifting piece and the adjusting slide block, so that the swinging length of the elastic shifting piece is different, and the valve needle is required to overcome the difference of the elasticity of the elastic shifting piece.
Description
Technical Field
The invention relates to the technical field of automobile fuel cells, in particular to a differential pressure regulating valve and a reactant supply system of a fuel cell.
Background
The electric pile is the core component of the fuel cell system, and for the proton exchange membrane fuel cell, the mechanical strength of the MEA is very weak, so that the air supply pressure difference of the cathode and the anode is strictly limited, and the damage of the MEA caused by the excessive unilateral pressure and the damage of the electric pile of the fuel cell are prevented. When a bench test is performed on a fuel cell system, the imbalance of the differential pressure between the cathode and the anode is a very common phenomenon due to the failure of a control system or the failure of an actuator. The cathode air supply end of the fuel cell system is usually an air compressor, and if the cathode pressure is too high, the air supply pressure can be rapidly reduced through power failure and sudden stop; however, the anode gas supply end is usually a high-pressure hydrogen bottle, if the anode pressure is too high, even if a power-off emergency stop strategy is adopted, high-pressure hydrogen still exists in a pipeline, and the hydrogen discharge valve is usually in a default normally-closed state due to the working characteristics of the hydrogen discharge valve, so that the anode still maintains higher pressure under extreme conditions. Therefore, the traditional fuel cell test bed adopts an electric control mode for regulating the pressure of the cathode and the anode, and lacks of mechanical structure guarantee, so that once an electric control system fails or breaks down, the pressure difference between the cathode and the anode is unbalanced, and the electric pile is damaged.
Disclosure of Invention
The invention aims to provide a differential pressure regulating valve and a reactant supply system of a fuel cell, which are used for solving the problems that a traditional fuel cell test bed lacks a mechanical structure guarantee, and once an electric control system fails or breaks down, the differential pressure of a cathode and an anode is unbalanced, and a galvanic pile is damaged.
In order to achieve the purpose, the invention adopts the following technical scheme:
a differential pressure regulating valve comprising:
the valve comprises a main valve body, a valve needle movable cavity and a control cavity, wherein the valve needle movable cavity extends along the transverse direction and the control cavity extends along the longitudinal direction;
the two plugs are arranged on the outer side of each first vent hole, and each plug is provided with a second vent hole communicated with the corresponding first vent hole;
a valve needle movably arranged in the valve needle moving cavity along the transverse direction, wherein two ends of the valve needle protrude from the first vent hole and selectively seal the second vent hole;
the adjusting assembly comprises an adjusting slider and an elastic shifting piece, the adjusting slider is arranged in the control cavity in a longitudinal sliding mode, the first end of the elastic shifting piece is connected to the valve needle in a clamping mode, the second end of the elastic shifting piece is arranged in the adjusting slider in a sliding mode, and the adjusting slider does not interfere with the elastic shifting piece during longitudinal movement.
The adjusting block in the adjusting component can be moved longitudinally, the elastic shifting piece penetrates through the adjusting block longitudinally and is clamped on the valve needle, when the longitudinal position of the adjusting block is different, the elastic shifting piece is different in length in a swinging mode from the protrusion of the adjusting block, the elastic force of the elastic shifting piece needs to be overcome by the valve needle is different, the length in the swinging mode is longer, the valve needle can move transversely easily, the length in the swinging mode is shorter, the valve needle is difficult to move transversely, and therefore the high-pressure-difference opening state and the low-pressure-difference opening state of the pressure difference adjusting valve are defined.
As a preferable scheme of the differential pressure regulating valve, the inner wall of the control cavity is provided with a guide groove extending along the longitudinal direction, and the edge of the regulating slide block is slidably arranged in the guide groove.
The guide groove plays a role in guiding the adjusting slide block along the longitudinal direction, so that the adjusting slide block cannot deviate in the sliding process.
As a preferable mode of the above differential pressure regulating valve, the regulating slider includes a regulating rod portion and a regulating disk portion, the regulating rod portion is arranged in the longitudinal direction, the regulating disk portion is disposed at an end of the regulating rod portion facing the valve needle, and the regulating disk portion is slidably disposed in the guide groove and receives a force moving toward the valve needle.
The adjusting disk part is applied with a force close to the valve needle, and when the adjusting slide block is not controlled, the swingable length of the elastic shifting piece is still maintained in a short area, and at the moment, the differential pressure adjusting valve is switched to a high differential pressure opening state, so that the safety is improved.
As a preferable scheme of the differential pressure regulating valve, a top cover is arranged at one end of the main valve body, which is far away from the valve needle moving cavity, of the control cavity, the regulating rod penetrates through the top cover, and a compression spring capable of stretching and retracting along the longitudinal direction is arranged between the regulating disk part and the inner end face of the top cover.
The top cap is worn to establish by the regulating rod portion, and then can be relative the top cap along vertical activity, is equipped with compression spring between regulating disk portion and the top cap, makes regulating disk portion receive the power of keeping away from the top cap.
As a preferable mode of the above differential pressure regulating valve, the regulating rod portion is provided with a knob penetrating through one end of the top cover, the regulating rod portion is in threaded connection with the knob, and the knob is configured to move in the longitudinal direction when the knob rotates around the longitudinal axis.
The knob can control the position of the adjusting rod part moving along the longitudinal direction, and the knob is also under the elastic force of the compression spring because the adjusting rod part is under the elastic force of the compression spring, and then can automatically abut against the top cover, so that the balance state is kept.
Preferably, the knob is engageable with an opposite end surface of the top cover.
After the knob is meshed with the opposite end face of the top cover, the knob is locked in a balanced state, and only by overcoming the elastic force of the compression spring, the knob and the top cover can be separated to perform rotating operation, so that the safety of the differential pressure regulating valve is improved.
As a preferable mode of the above differential pressure regulating valve, an opposing end surface of one of the knob and the top cover is provided with a convex tooth arranged around the center, and an opposing end surface of the other of the knob and the top cover is provided with a latch groove arranged around the center, and the convex tooth and the latch groove can be engaged with each other.
As a preferable scheme of the differential pressure regulating valve, an annular groove is formed on the middle surface of the valve needle, and the first end of the elastic shifting piece can be clamped in the annular groove in a transversely and relatively sliding manner.
After the annular groove is formed, the elastic shifting piece and the valve needle are limited mutually, the elastic shifting piece is allowed to slide on the annular groove and bend at a certain radian, the part, protruding out of the adjusting sliding block, of the elastic shifting piece is prevented from being pushed in two directions, therefore, the elastic shifting piece cannot be subjected to shearing force, the elastic shifting piece is protected, and the service life of the elastic shifting piece is prolonged.
As a preferable scheme of the differential pressure regulating valve, two ends of the valve needle are provided with sealing heads, the first vent hole comprises a first branch hole and a second branch hole which are communicated with each other, a connecting end of the first branch hole and the second branch hole is narrowed to form a supporting end, and the sealing heads are always arranged on the first branch hole in a sliding manner and can be connected with the second vent hole in a sealing manner.
Because the first vent hole comprises the first branch hole and the second branch hole, and the sealing head only moves on the first branch hole, the second vent hole can be communicated with the second branch hole as long as the sealing head is separated from the second vent hole, and the unsealing moving distance of the valve needle is reduced.
The invention also provides a reactant supply system of the fuel cell, which comprises the differential pressure regulating valve.
The invention has the beneficial effects that:
for the pressure difference regulating valve, the regulating slide block in the regulating assembly can move longitudinally, the elastic shifting piece penetrates through the regulating slide block longitudinally and is clamped on the valve needle, when the longitudinal position of the regulating slide block is different, the elastic shifting piece is different in length capable of swinging protruding from the regulating slide block, the valve needle is required to overcome different elasticity of the elastic shifting piece, the length capable of swinging is longer, the valve needle is easier to move transversely, the length capable of swinging is shorter, the valve needle is more difficult to move transversely, and therefore the high pressure difference opening state and the low pressure difference opening state of the pressure difference regulating valve are defined.
For a reactant supply system of a fuel cell, when the pressure of any one side of a cathode and an anode is too high to exceed a set pressure difference threshold value, the pressure difference regulating valve is opened, high-pressure gas is discharged into the pressure difference regulating valve and discharged into the atmosphere, the reactant supply system can adapt to different pressure difference values, when the pressure difference is large, the pressure difference regulating valve can be adjusted to be in a high-pressure-difference opening state, and when the pressure difference is small, the pressure difference regulating valve can be adjusted to be in a low-pressure-difference opening state.
Drawings
FIG. 1 is a schematic structural view of a differential pressure regulating valve according to an embodiment of the present invention;
FIG. 2 is a longitudinal sectional view of a differential pressure regulating valve in one state of the invention;
FIG. 3 is a longitudinal cross-sectional view of another state of the differential pressure regulating valve according to the embodiment of the present invention;
FIG. 4 is a schematic illustration of the mating of a first vent hole and a sealing head of a differential pressure regulating valve of an exemplary embodiment of the present invention;
FIG. 5 is a schematic view of the knob;
FIG. 6 is a schematic structural view of the top cover;
fig. 7 is a schematic connection diagram of a reactant supply system of a fuel cell according to an embodiment of the present invention.
In the figure:
1-main valve body; 2-plug; 3-valve needle; 4-adjusting the sliding block; 5-elastic shifting piece; 6-top cover; 7-compression spring; 8-a knob;
11-a valve needle moving cavity; 12-a control chamber; 20-a second vent; 30-an annular groove; 31-a sealing head; 41-adjusting rod part; 42-an adjustment disk portion; 60-a gullet groove; 80-convex teeth;
110-a first vent; 120-a guide groove; 110A-a first orifice; 110B-a second branch hole;
100-an air filter; 200-an air compressor; 300-an intercooler; 500-a hydrogen recycle unit; 600-a pressure reducing valve; 700-solenoid valve; 800-hydrogen discharge and drainage valve; 1000-back pressure valve; 1100-mixing chamber.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The invention provides a differential pressure regulating valve, which comprises a main valve body 1, a plug 2, a valve needle 3 and a regulating component as shown in figures 1 to 4.
The inside of main valve body 1 forms needle activity chamber 11 and the control chamber 12 that is the cross, and wherein needle activity chamber 11 extends and runs through main valve body 1's both ends along transversely, and control chamber 12 extends and runs through main valve body 1's both ends along longitudinal extension, and the both ends of needle activity chamber 11 are equipped with first air vent 110, and end cap 2 threaded connection is at main valve body 1's horizontal both ends and with first air vent 110 intercommunication. Gas can enter first vent hole 110 from plug 2, enter the interior of main valve body 1 and then exit from the pressure relief hole of main valve body 1 (the pressure relief hole is formed at the bottom of control chamber 12).
The valve needle 3 is movably arranged in the valve needle moving cavity 11 along the transverse direction, two ends of the valve needle 3 protrude from the first vent hole 110 and selectively seal the second vent hole 20, the second vent hole 20 is arranged on the plug 2, and the second vent hole 20 of the plug 2 is selectively communicated with the first vent hole 110 by the valve needle 3. For example, when the gas pressure on the left side of the needle movement chamber 11 is high, the needle 3 slides rightward, and the needle 3 is separated from the second vent hole 20 on the left side, and at this time, the second vent hole 20 communicates with the first vent hole 110, so that the gas can enter the main valve body 1 and be discharged from the lower portion of the main valve body 1.
The adjusting assembly comprises an adjusting slide block 4 and an elastic shifting piece 5, the adjusting slide block 4 is arranged in the control cavity 12 in a sliding mode along the longitudinal direction, the first end of the elastic shifting piece 5 is always abutted to the valve needle 3, the second end of the elastic shifting piece 5 is arranged in the adjusting slide block 4 in a sliding mode, and the adjusting slide block 4 does not interfere with the elastic shifting piece 5 when moving.
In this embodiment, the lower end of the elastic shifting piece 5 is clamped on the valve needle 3, when the valve needle 3 moves transversely, the elastic force of the elastic shifting piece 5 needs to be overcome inevitably, and the elastic force depends on the distance between the adjusting slide block 4 and the lower end of the elastic shifting piece 5, namely the swinging length, and the longer the swinging length is, the easier the valve needle 3 moves transversely, otherwise, the harder the valve needle 3 moves transversely.
The inner wall of the control chamber 12 is provided with a guide groove 120 extending in the longitudinal direction, and the edge of the adjusting slider 4 is slidably arranged in the guide groove 120. The adjusting slide 4 is not displaced during the longitudinal movement.
In this embodiment, at least two guide grooves 120 are provided, and the adjusting slider 4 forms a corresponding number of guide ribs corresponding to each guide groove 120.
As shown in fig. 3, the adjusting slider 4 includes an adjusting rod portion 41 and an adjusting disk portion 42, the adjusting rod portion 41 is arranged along the longitudinal direction, the adjusting disk portion 42 is disposed at one end of the adjusting rod portion 41 facing the valve needle 3, and the adjusting disk portion 42 is slidably disposed in the guide groove 120 and receives a force approaching the valve needle 3.
In this embodiment, the main valve body 1 is provided with a top cover 6 at one end of the control chamber 12 far away from the needle moving chamber 11, the adjusting rod part 41 penetrates through the top cover 6, and a compression spring 7 capable of expanding and contracting in the longitudinal direction is arranged between the adjusting disk part 42 and the inner end surface of the top cover 6.
As shown in fig. 2, the upper end of the compression spring 7 is connected to the top cover 6, and the lower end of the compression spring 7 is connected to the adjustment disk portion 42, so that the adjustment disk portion 42 is always urged to move toward the needle 3.
The adjusting rod portion 41 is provided with a knob 8 at one end penetrating the top cover 6, the adjusting rod portion 41 is in threaded connection with the knob 8, and the knob 8 is configured to move the adjusting rod portion 41 in the longitudinal direction when the knob 8 rotates around the longitudinal axis. Since the adjusting disk portion 42 is slidably disposed in the guide groove 120, when the knob 8 rotates, the adjusting slider 4 is limited by the guide groove 120 and can only move up and down as shown in fig. 2, thereby avoiding the rotation failure of the knob 8.
The knob 8 is engageable with the opposite end surface of the top cover 6.
As shown in fig. 5 and 6, the end surface of the knob 8 facing the top cover 6 is provided with a convex tooth 80 arranged around the center, the end surface of the top cover 6 facing the knob 8 is provided with a latch groove 60 arranged around the center, and the convex tooth 80 and the latch groove 60 can be matched with each other. That is, if the knob 8 is placed on the top cover 6, the knob 8 is locked by the engagement of the teeth 80 and the teeth slots 60, and if it is necessary to pull up the knob 8, the knob 8 is separated from the top cover 6.
Further, a ring-shaped groove 30 is formed on the middle surface of the valve needle 3, and the first end of the elastic shifting piece 5 is clamped in the ring-shaped groove 30 in a transversely and relatively sliding manner.
After the annular groove 30 is arranged, the elastic shifting piece 5 and the valve needle 3 are mutually limited, the elastic shifting piece 5 is allowed to slide on the annular groove 30 and bend at a certain radian, the part, protruding out of the adjusting sliding block 4, of the elastic shifting piece 5 is prevented from being pushed in two directions, therefore, the elastic shifting piece 5 cannot be subjected to shearing force (cannot be broken), the elastic shifting piece 5 is protected, and the service life of the elastic shifting piece 5 is prolonged.
With continued reference to fig. 2 and 4, the valve needle 3 is provided with sealing heads 31 at two ends, the first air vent 110 includes a first branch hole 110A and a second branch hole 110B which are communicated with each other, the connecting end of the first branch hole 110A and the second branch hole 110B is narrowed to form a supporting end, and the sealing head 31 is always slidably disposed in the first branch hole 110A and can be connected with the second air vent 20 in a sealing manner. Since the first ventilation hole 110 includes the first sub-hole 110A and the second sub-hole 110B, and the sealing head 31 moves only on the first sub-hole 110A, the second ventilation hole 20 can communicate with the second sub-hole 110B as long as the sealing head 31 is disengaged from the second ventilation hole 20, thereby reducing the unsealing movement distance of the needle 3, i.e., the needle 3 does not need to be completely withdrawn from the first ventilation hole 110.
In the present embodiment, the edges of the first and second sub-apertures 110A and 110B form a gourd-shaped profile.
The working principle of the differential pressure regulating valve is described as follows: as shown in fig. 2, the knob 8 is lifted up to separate the knob 8 from the top cover 6, at this time, since the adjusting rod part 41 is screwed into the knob 8, the adjusting rod part 41 moves upward synchronously, and then the adjusting disk part 42 is driven to move upward, the compression spring 7 is further compressed, the knob 8 is rotated to move the adjusting rod part 41 upward relative to the knob 8, the swingable length of the elastic plectrum 5 is increased at this time, after the swingable length is adjusted, the knob 8 is loosened, and the knob 8 moves toward the top cover 6 under the action of the compression spring 7 and is engaged with each other, so that the adjustment is completed. As shown in figure 3, if the swing length of the elastic shifting piece 5 needs to be reduced, the knob 8 is lifted, then the knob 8 is rotated reversely, the adjusting rod part 41 moves downwards and drives the adjusting disc part 42 to move downwards, the compression spring 7 is in a gradually loosening state, after the swing length is adjusted, the knob 8 is loosened, and the knob 8 moves towards the top cover 6 under the action of the compression spring 7 and is meshed with the top cover to finish the adjustment.
As shown in fig. 7, the present invention further provides a reactant supply system for a fuel cell, which includes an air subsystem and a hydrogen subsystem.
An air subsystem: the air compressor 200 sucks air from the atmosphere through the air filter 100, and sends out high-pressure and high-temperature air after compression, the air is cooled by the intercooler 300 and then sent to the cathode of the galvanic pile, the air supply pressure of the air in the galvanic pile is mainly regulated and controlled by the backpressure valve 1000, and the air after reaction is discharged to the atmosphere after passing through the backpressure valve 1000 and the mixing chamber 1100 in sequence.
A hydrogen subsystem: the hydrogen gas in the high-pressure hydrogen bottle enters the pressure reducing valve 600 through the hydrogen inlet solenoid valve 700 to be adjusted to a proper pressure, and then enters the hydrogen circulation device 500 for driving the unreacted hydrogen gas discharged from the anode to re-enter the stack. The anode outlet of the galvanic pile is provided with a hydrogen discharge drain valve 800, the hydrogen discharge drain valve 800 is opened periodically according to the operation requirement of the system, the hydrogen-rich tail gas is discharged into the mixing chamber 1100, and the gas after the cathode reaction is diluted and discharged into the atmosphere.
The negative pole of the galvanic pile, positive pole entry set up a branch road separately, the air pressure in the branch road is identical with galvanic pile negative pole, positive pole respective air pressure, connect to two end caps 2 of the pressure difference damper valve of the invention, used for driving the valve to open and close and high-pressure gas relief, the pressure relief hole of the pressure difference damper valve couples to mixing chamber 1100, when the pressure of any side of negative pole, positive pole is too high to exceed the pressure difference threshold value that is presumed, the first air vent 110 of the high-pressure side is turned on, discharge the high-pressure gas to the mixing chamber 1100 finally, discharge into the atmosphere after fully mixing with negative pole exhaust.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A differential pressure regulating valve, comprising:
the main valve comprises a main valve body (1), wherein a valve needle moving cavity (11) extending along the transverse direction and a control cavity (12) extending along the longitudinal direction are arranged in the main valve body (1), the valve needle moving cavity (11) is communicated with the control cavity (12), and two ends of the valve needle moving cavity (11) are provided with first vent holes (110);
the two plugs (2), the plugs (2) are arranged at the outer side of each first vent hole (110), and the plugs (2) are provided with second vent holes (20) communicated with the first vent holes (110);
a valve needle (3), wherein the valve needle (3) is movably arranged in the valve needle movable cavity (11) along the transverse direction, and two ends of the valve needle (3) protrude from the first vent hole (110) and selectively seal the second vent hole (20);
the adjusting assembly comprises an adjusting slide block (4) and an elastic shifting piece (5), the adjusting slide block (4) is longitudinally slidably arranged in the control cavity (12), a first end of the elastic shifting piece (5) is clamped on the valve needle (3), a second end of the elastic shifting piece (5) is slidably arranged in the adjusting slide block (4), and the adjusting slide block (4) does not interfere with the elastic shifting piece (5) when moving longitudinally; wherein:
the both ends of needle (3) are equipped with sealed head (31), first venthole (110) are including first minute hole (110A) and second minute hole (110B) that communicate each other, first minute hole (110A) with the link narrowing of second minute hole (110B) is the support end, sealed head (31) are slided all the time and are established on first minute hole (110A) and can with second venthole (20) sealing connection.
2. Differential pressure regulating valve according to claim 1, characterized in that the inner wall of the control chamber (12) is provided with a longitudinally extending guide groove (120), the edge of the regulating slider (4) being slidingly arranged in the guide groove (120).
3. The differential pressure regulating valve according to claim 2, characterized in that the regulating slider (4) comprises a regulating rod portion (41) and a regulating disk portion (42), the regulating rod portion (41) being arranged in a longitudinal direction, the regulating disk portion (42) being provided at an end of the regulating rod portion (41) facing the valve needle (3), the regulating disk portion (42) being slidingly provided in the guide groove (120) and being subjected to a force moving toward the valve needle (3).
4. The differential pressure regulating valve according to claim 3, characterized in that the main valve body (1) is provided with a top cover (6) at one end of the control cavity (12) far away from the valve needle moving cavity (11), the regulating rod part (41) penetrates through the top cover (6), and a compression spring (7) capable of expanding and contracting along the longitudinal direction is arranged between the regulating disk part (42) and the inner end surface of the top cover (6).
5. The differential pressure regulating valve according to claim 4, wherein the regulating rod portion (41) is provided with a knob (8) penetrating through one end of the top cover (6), the regulating rod portion (41) is in threaded connection with the knob (8), and the knob (8) is configured such that the regulating rod portion (41) moves in a longitudinal direction when the knob (8) rotates around a longitudinal axis.
6. Differential pressure regulating valve according to claim 5, wherein the knob (8) is engageable between opposite end faces of the cover (6).
7. Differential pressure regulating valve according to claim 6, characterized in that the opposite end face of one of the knob (8) and the cover (6) is provided with a centrally arranged protruding tooth (80), and the opposite end face of the other of the knob (8) and the cover (6) is provided with a centrally arranged latch groove (60), the protruding tooth (80) and the latch groove (60) being mutually engageable.
8. Differential pressure regulating valve according to claim 1, characterized in that the valve needle (3) has an annular groove (30) formed in its central surface, and the first end of the resilient finger (5) is laterally relatively slidably snapped into the annular groove (30).
9. A reactant supply system for a fuel cell, comprising the differential pressure regulating valve according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134858.6A CN111022716B (en) | 2019-11-19 | 2019-11-19 | Differential pressure regulating valve and reactant supply system for fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134858.6A CN111022716B (en) | 2019-11-19 | 2019-11-19 | Differential pressure regulating valve and reactant supply system for fuel cell |
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| Publication Number | Publication Date |
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| CN111022716A CN111022716A (en) | 2020-04-17 |
| CN111022716B true CN111022716B (en) | 2022-01-14 |
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| CN201911134858.6A Active CN111022716B (en) | 2019-11-19 | 2019-11-19 | Differential pressure regulating valve and reactant supply system for fuel cell |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003102408A1 (en) * | 2002-06-04 | 2003-12-11 | Robert Bosch Gmbh | Pressure regulator for a fuel supply system of an internal combustion engine |
| CN202302088U (en) * | 2011-09-28 | 2012-07-04 | 芜湖市安芜汽车制动元件有限公司 | Tee valve assembly |
| CN104373650A (en) * | 2014-11-18 | 2015-02-25 | 温州仁谦汽车油泵有限公司 | Leaf spring type constant pressure valve |
| CN205937973U (en) * | 2016-08-29 | 2017-02-08 | 高杏茂 | Three solenoid valve of tribit |
| CN106594336A (en) * | 2017-01-25 | 2017-04-26 | 文成县简创科技有限公司 | One-way pressure release valve |
| CN206682354U (en) * | 2017-03-24 | 2017-11-28 | 江苏海鼎电气科技有限公司 | A kind of slidingtype three-way diverter valve |
| CN209569366U (en) * | 2019-03-25 | 2019-11-01 | 宁波依得力液压制造有限公司 | Novel three-way shuttle valve |
-
2019
- 2019-11-19 CN CN201911134858.6A patent/CN111022716B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003102408A1 (en) * | 2002-06-04 | 2003-12-11 | Robert Bosch Gmbh | Pressure regulator for a fuel supply system of an internal combustion engine |
| CN202302088U (en) * | 2011-09-28 | 2012-07-04 | 芜湖市安芜汽车制动元件有限公司 | Tee valve assembly |
| CN104373650A (en) * | 2014-11-18 | 2015-02-25 | 温州仁谦汽车油泵有限公司 | Leaf spring type constant pressure valve |
| CN205937973U (en) * | 2016-08-29 | 2017-02-08 | 高杏茂 | Three solenoid valve of tribit |
| CN106594336A (en) * | 2017-01-25 | 2017-04-26 | 文成县简创科技有限公司 | One-way pressure release valve |
| CN206682354U (en) * | 2017-03-24 | 2017-11-28 | 江苏海鼎电气科技有限公司 | A kind of slidingtype three-way diverter valve |
| CN209569366U (en) * | 2019-03-25 | 2019-11-01 | 宁波依得力液压制造有限公司 | Novel three-way shuttle valve |
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|---|---|
| CN111022716A (en) | 2020-04-17 |
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