CN113137569A

CN113137569A - Vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve

Info

Publication number: CN113137569A
Application number: CN202110449296.5A
Authority: CN
Inventors: 柴为民; 陈永新; 路远航; 张鑫波
Original assignee: Hangzhou Chunjiang Valve Co ltd
Current assignee: Hangzhou Chunjiang Valve Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-07-20

Abstract

The invention discloses a vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve, which comprises a valve body, wherein a flow stabilizing valve, a stop valve, a pressure reducing valve, an electromagnetic valve, an inflation one-way valve, an overpressure safety valve, an overheating safety valve, a deflation valve, an inflation inlet filter core, an air outlet filter core, a temperature sensor, a cylinder air pressure and output air pressure sensor interface and the like are arranged in the valve body, and all parts are arranged in the valve body and communicated through corresponding pipelines in the valve body; the output flow fluctuation is small; the output pressure can be adjusted according to the requirements of the fuel cell; the pressure is at low pressure after the pressure reducing valve is opened during the period of stopping gas supply, and the electromagnetic force for opening the electromagnetic valve is small; when the hydrogen storage bottle is over-pressure and over-temperature, the corresponding over-pressure and over-temperature safety valve acts to discharge the high-pressure hydrogen in the bottle outwards so as to avoid over-pressure explosion; the air pressure, temperature and output pressure in the bottle can be monitored at any time.

Description

Vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve

Technical Field

The invention relates to the technical field of valves, in particular to a vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve.

Background

In order to improve the endurance mileage and the performance of the whole vehicle, the hydrogen pressure of the current vehicle-mounted hydrogen storage bottle reaches 70MPa, which requires high safety of a bottle valve, high functional integration level and high monitoring performance, the output flow of the bottle valve used at home and abroad at present has large fluctuation, which is undesirable for a fuel cell, in addition, a pressure reducing valve is externally connected, which increases the complexity and leakage points of connection, and if a plurality of hydrogen storage bottles are connected to one pressure reducing valve, once the pressure reducing valve fails, the vehicle can be stopped for maintenance or replacement, which is not only troublesome, but also wastes time. The invention is designed for solving the technical defects of the common vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve.

Disclosure of Invention

The invention aims to solve the problems of a hydrogen storage cylinder valve in a high-pressure hydrogen energy fuel cell automobile in the prior art, and provides a vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve which has the advantages of high safety, high function integration level and high monitoring performance.

The invention adopts a specific technical scheme for solving the technical problems that the vehicle-mounted ultrahigh pressure hydrogen storage cylinder combination valve comprises a valve body, wherein a flow stabilizing valve, a stop valve, a pressure reducing valve, an electromagnetic valve, an inflation one-way valve, an overpressure safety valve, an overheating safety valve, an air release valve, an inflation inlet filter core, an air outlet filter core, a temperature sensor, and a cylinder internal air pressure and output air pressure sensor interface are arranged in the valve body; during inflation, the high-pressure hydrogen opens the inflation one-way valve through the inflation inlet filter element, and inflates the hydrogen storage bottle through a corresponding channel in the valve body; when supplying gas, the high-pressure hydrogen in the hydrogen storage bottle supplies gas to the fuel cell through the gas supply filter element, the flow stabilizing valve, the stop valve, the pressure reducing valve, the electromagnetic valve and the gas outlet filter element; the flow stabilizing valve is used for reducing fluctuation of output flow, and the pressure reducing valve is used for adjusting output pressure to meet the requirements of the fuel cell.

The working principle of the vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve is as follows (see figure 1): when the hydrogen storage bottle is inflated, the electromagnetic valve is closed, high-pressure hydrogen is firstly filtered by the filter element of the inflation inlet so as to prevent impurities from entering the hydrogen storage bottle and then enters the hydrogen storage bottle through the inflation one-way valve, and the inflation one-way valve has the function of preventing the hydrogen from reversely flowing when the gas supply is stopped so as to realize pressure maintaining; the high-pressure hydrogen in the hydrogen storage bottle is connected with an overheating safety valve, an overpressure safety valve, an air release valve, a bottle internal pressure sensor, an output pressure sensor and a bottle internal gas temperature sensor through corresponding pipelines in the valve body; the overheating safety valve has the function that when the temperature of the combined valve rises to 110 +/-5 ℃ due to environmental temperature rise (such as vehicle combustion), the overheating protection device acts to discharge high-pressure hydrogen in the cylinder outwards so as to prevent the hydrogen storage cylinder from being exploded due to overheating and overpressure; the overpressure safety valve has the function of automatically opening and deflating when the inflation pressure is higher than 70MPa or the air pressure in the bottle exceeds 70MPa due to the rise of the external temperature; the air release valve has the function that when the pressure release valve or the electromagnetic valve fails and the fuel cell cannot be supplied with air, the air release valve can be manually opened to discharge high-pressure hydrogen in the bottle outwards or into other containers; the gas pressure sensor in the bottle is used for observing the pressure of hydrogen in the bottle, and when the gas pressure is reduced to be lower than the lowest working pressure, the gas is required to be inflated in time, and when the inflation pressure reaches 70MPa, the gas is required to be stopped; the output pressure sensor is used for observing whether the output pressure meets the requirement of the fuel cell; the gas temperature sensor in the bottle is used for observing the temperature of the hydrogen in the bottle, the normal temperature range is-40 ℃ to 85 ℃, and whether accidents or improper operation occurs can be timely checked when the temperature is over-high.

When the hydrogen storage bottle supplies hydrogen to the fuel cell, the electromagnetic valve is opened, and the hydrogen supplies the hydrogen to the fuel cell through the air supply filter element, the flow stabilizing valve, the stop valve, the pressure reducing valve, the electromagnetic valve and the air outlet filter element in sequence. The function of the flow stabilizing valve is to control the fluctuation of output flow, which is required by the fuel cell, and in addition, when the passing flow is too large, the valve port is automatically closed, and only the limited flow is output through the small hole; the stop valve has the function that when the pressure reducing valve or the electromagnetic valve is overhauled, or the filter element at the air outlet is replaced, or downstream equipment has a fault, the stop valve can be closed to stop air supply; the function of the pressure reducing valve is to reduce the high-pressure hydrogen gas before the valve to the low pressure required by the fuel cell and to maintain the low pressure after the valve during the period of stopping the gas supply to reduce the electromagnetic force required to open the electromagnetic valve; the electromagnetic valve is used for opening or closing hydrogen supply to the fuel cell; the function of the air outlet filter element is to prevent impurities from entering the fuel cell.

Preferably, the valve body consists of an upper part and a lower part which are vertical to each other, the upper part is a cuboid, the lower part is a step-shaped cylinder, the external thread of the upper cylinder is screwed with the internal thread above the opening of the hydrogen storage bottle, the lower cylinder is matched with the inner hole below the opening in a sliding way, an O-shaped sealing ring I and a check ring I are arranged in the annular groove of the lower cylinder, all parts are arranged in the valve body and are communicated by corresponding channels in the valve body, and the channel openings are blocked by steel balls and sealing screws.

Preferably, a step-shaped longitudinal hole is arranged above one side of the lower cylinder, the longitudinal hole is parallel to the axis of the lower cylinder and is eccentrically arranged, a flow stabilizing valve is arranged in the small hole, hydrogen in the hydrogen storage bottle is fed to the flow stabilizing valve through an air inlet, and an air inlet filter element is arranged at the lower end of the air inlet and is positioned by a second retainer ring; the flow stabilizing valve comprises a flow stabilizing valve core, a spring I and a taper hole on the lower end face of a stop valve sleeve above the spring I, the central lines of all parts are on the same axis, the major diameter of the lower part of the flow stabilizing valve core is in dynamic fit with a corresponding hole in the valve body, two annular balance grooves are arranged on the outer diameter, the top end of a small shaft at the upper part is a frustum, the taper angle of the frustum is the same as the taper of the taper hole on the lower end face of the stop valve sleeve, the two taper angles form a valve port of the flow stabilizing valve, the center of the bottom end of the flow stabilizing valve core is provided with a bottom hole, the hole wall of the bottom hole is provided with a first radial hole, and the top end of the bottom hole is provided with a through small hole; the first spring is arranged between the shoulder blade of the large-diameter shaft and the lower end face of the stop valve sleeve.

Preferably, a stop valve is arranged in a large hole of the stepped longitudinal hole, the stop valve comprises a stop valve sleeve, a stop valve core and a first locking nut, and the central line of each part is consistent with that of the flow stabilizing valve; the outer diameter of the second end of the stop valve sleeve is small, the middle of the second end of the stop valve sleeve is large, a cylinder of the lower section is in sliding fit with a corresponding hole of the valve body and is provided with a second O-shaped sealing ring and a third O-shaped sealing ring, an external thread of the middle section is screwed with a corresponding internal thread in the valve body, a stepped through hole is arranged in the center of the lower end face, an internal thread in an upper hole of the stepped through hole is screwed with an external thread of the stop valve core, a middle hole is in sliding fit with a valve rod of the stop valve core, a fourth O-shaped sealing ring and a third retaining ring are arranged, the lower end of the valve rod of the stop valve core is provided with a frustum, the taper of the frustum is the same as that of a taper hole at the bottom end of the middle hole in the stop valve sleeve, the valve port of the stop valve is normally opened and locked by a first locking nut, the second radial holes which are uniformly distributed and communicated with the middle hole are arranged on the cylinder wall of the lower section of the stop valve sleeve, and an annular groove is arranged at the outer opening of the second radial holes; and an O-shaped sealing ring V is arranged between the lower end surface of the stop valve sleeve and the end surface of the corresponding hole in the valve body.

Preferably, a pressure reducing valve is arranged at the right lower part of the cuboid of the valve body and comprises a right valve sleeve, a left valve sleeve, a pressure reducing valve seat, a slide valve, a universal plug ring, a diaphragm, a second spring, a gasket and a second locking nut, and the central lines of all parts are on the same axis; the external thread at the right end of the right valve sleeve is screwed with the corresponding internal thread in the valve body and is fixed by a taper end screw, the outer cylinder at the left end is matched in a corresponding hole of the valve body in a sliding way and is provided with an O-shaped sealing ring six, the center of the left side is provided with a stepped blind hole, the cylinder wall is provided with 4 uniformly distributed radial holes four, and the outer opening of the radial hole four is provided with an annular groove; the left valve sleeve is in a step shape, the diameter of the left valve sleeve is larger on the right and smaller on the left, the centers of the left and right cylinders are provided with pits, the middle of the two pits is provided with a partition wall, the right cylinder is in sliding fit in a corresponding hole of the valve body and is provided with two O-shaped seal rings seven, the cylinder wall of the right cylinder is provided with 4 uniformly distributed radial holes five, and the outer openings of the radial holes five are provided with annular grooves; the wall of the left cylinder is provided with 4 uniformly distributed radial holes III, and a universal plug ring is arranged in a groove of an inner hole of the partition wall; the outer circle of the shoulder blade on the right side of the pressure reducing valve seat is matched in an inner hole of the left pit of the left sliding sleeve in a sliding manner, the middle part of the right end of the pressure reducing valve seat is provided with a convex ball, the convex ball and the conical hole on the left end of the sliding valve form a pressure reducing valve port, and the material hardness of the pressure reducing valve seat is lower than that of the sliding valve; the valve rod in the middle section of the slide valve is matched in an inner hole of the universal plug ring in a sliding way, the inner ring of the membrane clamped between the two gaskets is tightly pressed on the shoulder blade of the valve rod by the right end of the slide valve through two locking nuts II to form a whole, the left end of the slide valve is provided with a flange with a larger diameter, the center of the flange is provided with a through hole, and the left end of the through hole is provided with a taper hole; and the second spring is arranged between the right end face of the partition wall and the gasket.

Preferably, an electromagnetic valve is arranged at the upper right of the cuboid of the valve body, the electromagnetic valve comprises an electromagnet, an electromagnetic valve seat, an air outlet filter element and the like, the central lines of all parts are on the same axis, a barrel body of the electromagnet is arranged in a corresponding hole of the valve body in a sliding mode, an O-shaped sealing ring eight is arranged, the O-shaped sealing ring eight is positioned by a retainer ring four, and an outgoing cable penetrates through the corresponding hole in the side face of the cuboid and is fixed by a lead sealing joint; a sealing gasket is arranged in a blind hole at the front end of the movable iron core of the electromagnet, and the sealing gasket and an annular edge of a frustum at the left end of the electromagnetic valve seat form an electromagnetic valve port; the surface of the movable iron core cylinder is provided with two through longitudinal holes, the electromagnetic valve seat is screwed in a corresponding screw hole of the cuboid of the valve body, the cylinder with a slightly smaller diameter at the middle part is slidably matched in the corresponding hole and is provided with an O-shaped sealing ring nine, and the left end of the cylinder is provided with a small frustum; the right end of the central hole is provided with a screw hole which is connected with a joint of the air outlet pipeline, the left end of the central hole is provided with an axle hole, the middle of the central hole is provided with an oblate cylindrical hole, an air outlet filter element is arranged in the hole and is positioned by a retainer ring, the axle hole is connected with the oblate cylindrical hole through a taper hole, and the electromagnetic valve seat is fastened by a taper end screw after being adjusted.

Preferably, the overpressure safety valve and the overheating safety valve are arranged at the left upper part of the cuboid and are designed into a whole, the overpressure safety valve and the overheating safety valve comprise a safety valve sleeve, a safety valve core, a spring III, a piston, a fusible plug block, an adjusting stud and a locking nut III, and the central lines of all parts are located on the same axis; the external thread of the safety valve sleeve is screwed with the internal thread of the corresponding hole, the lower cylinder is matched with the corresponding hole in a sliding way, the shoulder blade on the periphery of the bottom end is provided with a sealing ring, the center of the shoulder blade is provided with a stepped hole, the large hole of the stepped hole is provided with the internal thread, and the small hole is matched with a piston in a sliding way; a third spring is arranged between the upper plane of the lower cone of the safety valve core and the lower end surface of the piston, the taper of the lower end cone of the safety valve core is the same as the taper of a chamfer above a central hole of the bottom wall of the safety valve sleeve, and the third spring and the fourth spring form a valve port of the safety valve; the handle end of the safety valve core is loosely arranged in the blind hole at the bottom end of the piston; the external screw thread of adjusting the double-screw bolt closes in the macroporous internal thread of safety valve cover soon, and the top has hexagon socket, and the bottom is equipped with the pit, sets up the fusible plug piece in the pit, and central authorities are equipped with the intercommunicating pore, are equipped with the through-hole of four equipartitions on the safety valve cover barrel wall, are equipped with the annular groove on the external diameter of through-hole outer mouthful, communicate with each other with the gas pocket of releasing.

Preferably, the inflation one-way valve is arranged at the middle lower part of the left side of the cuboid, the inflation one-way valve comprises an inflation valve sleeve, a spring IV and an inflation valve core, and the central lines of all parts are on the same axis; the outer thread on the major diameter of the inflating valve sleeve is screwed with the corresponding inner thread on the cuboid, the minor diameter of the inflating valve sleeve is matched with the corresponding hole in a sliding mode, and an O-shaped sealing ring is arranged.

Preferably, the air release valve is arranged at the left lower part of the cuboid and comprises an air release valve seat, a screw, an air release valve core, a spring five and a locking nut four, and the central lines of all parts are positioned on the same axis; the external thread on the large diameter of the air release valve seat is screwed with the internal thread of the corresponding hole, the small cylinder is matched with the corresponding hole in a sliding way, the shoulder blade at the top end is provided with an O-shaped sealing ring eleven, the diameters of two ends of the inner hole are larger, the diameter of the middle part is smaller, the bottom of the upper hole is provided with an annular groove, an air release valve core is movably matched in the hole, the taper of a frustum at the lower end of the air release valve core is the same as the taper of a chamfer above the small hole at the middle part, the two components form an air release valve port, a spring five is arranged in a blind hole of the air release valve core, and the wall of the blind hole bottom is provided with four uniformly distributed through holes; the internal thread in the lower hole is screwed with the external thread of the screw, a small cylinder above the screw is matched with the small hole in the middle section of the air release valve seat in a sliding way, an O-shaped sealing ring twelve is arranged, and the top surface of the small shaft at the top end is opposite to the top surface of the conical table of the air release valve core and is not contacted at ordinary times; four uniformly distributed through holes are arranged in the middle of the cylinder wall of the air release valve seat, and an annular groove is arranged on the outer diameter of an outer opening of each through hole and communicated with an air release hole.

Preferably, the other side of the cylinder of the valve body is also provided with a longitudinal hole and a transverse hole, the lower end of the longitudinal hole is in threaded connection with the temperature sensor and is sealed by a sealing gasket, and a lead of the longitudinal hole passes through the longitudinal hole and the transverse hole to be led out of the combined valve and is fixed by a lead sealing joint.

The invention has the beneficial effects that: the defects of the cylinder valve in the prior art are effectively overcome, the function integration level is high, and the trouble and leakage points on connection are reduced; the output flow fluctuation is small; the output pressure can be adjusted according to the requirements of the fuel cell; the pressure is at low pressure after the pressure reducing valve is opened during the period of stopping gas supply, and the electromagnetic force for opening the electromagnetic valve is small; compact structure, complete functions, high safety and the like.

Drawings

FIG. 1 is a schematic diagram of the operation of the vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve of the invention;

FIG. 2 is a longitudinal sectional view of the assembled valve of the vehicle-mounted ultra-high pressure hydrogen storage cylinder of the present invention;

fig. 3 is a transverse sectional view of the vehicle-mounted ultra-high pressure hydrogen storage cylinder combination valve of the present invention.

In the figure: 1. the valve comprises a valve body, a fourth O-shaped sealing ring, a third retainer, a third stop valve core, a 5 locking nut, a first stop valve sleeve, a 7 sealing screw, a 8 steel ball, a 9 flow stabilizing valve core, a 10 spring, a 11 retainer, a 12O-shaped sealing ring, a 13 retainer, a 14 air inlet filter element 15, a temperature sensor, a 16 sealing gasket, a 17O-shaped sealing ring, a fifth O-shaped sealing ring, 18 a lead sealing joint, a second O-shaped sealing ring, a third O-shaped sealing ring, a 21 left valve sleeve, a seventh O-shaped sealing ring, a 23 diaphragm, a 24 right valve sleeve, a 25 locking nut, a second 26 gasket, a sixth O-shaped sealing ring, 28 a cone end screw, a 29 spring, a second spring, a 30 sliding valve, a 31 joint, a 32 filter element, a 33 universal plug ring, a 34 pressure reducing valve seat, a 35 spring, a fifth spring, a 36 screw, a 37 locking nut, a twelfth O-shaped sealing ring, 39 air releasing valve seat, 40. the gas release valve core, 41, eleven O-shaped sealing rings, 42, ten O-shaped sealing rings, 43, four springs, 44, a gas filling valve core, 45, a gas filling port filter core, 46, a gas filling valve sleeve, 47, a safety valve core, 48, three springs, 49, a safety valve sleeve, 50, a piston, 51, a fusible plug block, 52, a locking nut, three, 53, an adjusting stud, 54, an electromagnet, 55, eight O-shaped sealing rings, 56, a retainer ring, 57, nine O-shaped sealing rings, 58, an electromagnetic valve seat, 59, a gas outlet filter core, 60, an electromagnet spring, an air inlet hole, b, a bottom hole, a radial hole, a through small hole, e, a radial hole, a ring groove, g, a through hole I, h, a radial hole, j, a radial hole, k, a through hole II, a radial hole V, m, a through hole III, n, a gas hole, a shaft hole, z1., a longitudinal hole z2., an A1, a first connecting hole, an A2, a second connecting hole, a B1, a gas filling hole, a B2, a gas outlet hole, B3. a bleed hole, B4. bleed hole, v1 valve port of a steady flow valve, v2 valve port of a stop valve, valve port of a V3. pressure reducing valve, valve port of a V4. solenoid valve, valve port of a V5. safety valve, valve port of a V6. check valve, and valve port of a V7. bleed valve.

Detailed Description

The following further describes embodiments of the present invention by way of examples, with reference to the accompanying drawings.

Example 1

The working principle of the vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve is shown in figure 1, when a hydrogen storage cylinder is inflated, the electromagnetic valve is closed, high-pressure hydrogen is firstly filtered by the filter element at the inflation inlet so as to prevent impurities from entering the hydrogen storage cylinder, then the inflation check valve enters the hydrogen storage cylinder, and the inflation check valve has the function of preventing the hydrogen from reversely flowing when the air supply is stopped so as to realize pressure maintaining; the high-pressure hydrogen in the hydrogen storage bottle is connected with an overheating safety valve, an overpressure safety valve, a vent valve, a bottle internal air pressure P0 sensor, an output pressure P sensor and a bottle internal air temperature T sensor through corresponding pipelines in the valve body; the overheating safety valve has the function that when the temperature of the combined valve rises to 110 +/-5 ℃ due to environmental temperature rise (such as vehicle combustion), the overheating protection device acts to discharge high-pressure hydrogen in the cylinder outwards so as to prevent the hydrogen storage cylinder from being exploded due to overheating and overpressure; the overpressure safety valve has the function of automatically opening and deflating when the inflation pressure is higher than 70MPa or the air pressure in the bottle exceeds 70MPa due to the rise of the external temperature; the air release valve has the function that when the pressure release valve or the electromagnetic valve fails and the fuel cell cannot be supplied with air, the air release valve can be manually opened to discharge high-pressure hydrogen in the bottle outwards or into other containers; the gas pressure sensor in the bottle is used for observing the pressure of hydrogen in the bottle, and when the gas pressure is reduced to be lower than the lowest working pressure, the gas is required to be inflated in time, and when the inflation pressure reaches 70MPa, the gas is required to be stopped; the output pressure sensor is used for observing whether the output pressure meets the requirement of the fuel cell; the gas temperature sensor in the bottle is used for observing the temperature of the hydrogen in the bottle, the normal temperature range is-40 ℃ to 85 ℃, and whether accidents or improper operation occurs can be timely checked when the temperature is over-high.

The structure of the vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve is shown in figures 2 and 3, and has the characteristics of high function integration level, high safety and high monitoring performance, and is formed by integrating a valve body 1, an inflation inlet filter element 45, a flow stabilizing valve, a stop valve, a pressure reducing valve, an electromagnetic valve, an inflation valve, a deflation valve, an overheating safety valve, an overpressure safety valve, a temperature sensor, a first connecting hole A1 and a second connecting hole A2 which are connected with a cylinder pressure and output port pressure sensor, an air outlet B1, an inflation hole B2, a drainage hole B3, an air outlet B4 and the like, wherein all parts are arranged in the valve body 1 and are communicated with corresponding channels in the valve body 1 according to design requirements, and all channel ports are sealed by stainless steel balls 8 and sealing screws 7. The valve body 1 is made of high-strength aluminum alloy, so that the valve body is light in weight and consists of an upper part and a lower part which are vertical to each other, wherein the upper part is a cuboid, and the lower part is basically a trapezoidal cylinder; the external thread above the stepped cylinder is screwed with the internal thread above the opening of the hydrogen storage bottle, the lower cylinder below the stepped cylinder is matched with the inner hole below the opening in a sliding manner, the O-shaped sealing ring I12 and the check ring I11 are arranged in the groove of the lower cylinder, and the check ring I11 is used for preventing high-pressure hydrogen from extruding the O-shaped sealing ring I12 into the matching gap. A stepped longitudinal bore is provided above one side of the lower cylindrical axis, the axis of the stepped longitudinal bore is O-O, parallel to the lower cylindrical axis, the longitudinal bore is offset (the offset is labelled D in figure 2) with respect to the lower cylindrical axis, the position of which on the cuboid plane is seen in figure 3. The big hole of the ladder-shaped longitudinal hole is provided with a stop valve, the small hole is provided with a flow stabilizing valve, hydrogen in the hydrogen storage bottle is fed to the flow stabilizing valve through an air inlet hole a, the central line of the air inlet hole a is consistent with the central line of the ladder-shaped longitudinal hole, and the lower end of the air inlet hole a is provided with an air feeding filter element 14 which is positioned by a second retainer ring 13.

The flow stabilizing valve comprises a flow stabilizing valve core 9, a spring I10, a taper hole on the lower end face of the stop valve sleeve 6 and the like, and the central lines of all parts are on the same axis; the major diameter of the lower part of the flow stabilizing valve core 9 is in dynamic fit with a corresponding hole in the valve body 1, two annular balance grooves are arranged on the outer diameter of the flow stabilizing valve core to balance lateral force generated by high-pressure gas, the top end of the upper small shaft is provided with a frustum, the taper angle of the frustum is the same as the taper angle of a taper hole on the lower end face of the stop valve sleeve 6, the frustum and the stop valve sleeve form a flow stabilizing valve port V1, the center of the bottom end of the flow stabilizing valve core 9 is provided with a bottom hole b, the wall of the bottom hole b is provided with four uniformly distributed radial holes I c to send pressure gas to the flow stabilizing valve port V1, the top end of the bottom hole B is drilled with a through small hole d, and a spring I10 is arranged between the shoulder blade of the major diameter shaft and the lower end face of the stop valve sleeve 6. The working principle of the flow stabilizing valve is that high-pressure hydrogen enters a valve port V1 of the flow stabilizing valve through an air inlet filter element 14, an air inlet hole a, a bottom hole b and a radial hole c, the flow passing through the valve port V1 of the flow stabilizing valve depends on the opening size of a valve port V1 of the flow stabilizing valve, the opening size depends on the pressure difference of two ends of a valve core 9, when the flow passing through the valve port V1 of the flow stabilizing valve exceeds the set flow, the pressure difference of two ends of the valve core 9 is increased due to the throttling and pressure reducing effect of the valve port V1 of the flow stabilizing valve, the pressure of a spring I10 is overcome to move upwards, the opening size of the valve port V1 of the flow stabilizing valve is reduced, and the passing flow is reduced to the set value; on the contrary, when the passing flow is reduced, the pressure difference at two ends of the valve core 9 is reduced, the valve core moves downwards under the pushing of the first spring 10, the opening degree of the valve port V1 of the flow stabilizing valve is increased, and the passing flow is increased to the set value; when the flow rate is greatly increased, the valve port V1 of the flow stabilizing valve is closed, and the hydrogen gas is output by a limited amount through the through small hole d.

The stop valve comprises a stop valve sleeve 6, a stop valve core 4, a locking nut I5 and other parts, the central line of each part is consistent with the central line of the flow stabilizing valve, the two ends of the outer diameter of the stop valve sleeve 6 are small, the middle part is large, a lower section of a cylinder is matched in a corresponding hole of the valve body 1 in a sliding way and is provided with an O-shaped sealing ring II 19 and an O-shaped sealing ring III 20, an external thread of the middle section is screwed with a corresponding internal thread in the valve body 1, the center is provided with a stepped through hole, the center of the lower end surface is provided with a taper hole, an internal thread in the upper hole of the stepped through hole is screwed with an external thread of the stop valve core 4, the middle hole is matched with a valve rod of the stop valve core 4 in a sliding way and is provided with an O-shaped sealing ring IV 2 and a check ring III 3, the lower end of the valve rod of the stop valve core 4 is a frustum, the taper of the frustum is the same as the taper hole at the bottom end of the middle hole of the stop valve sleeve 6, the two parts form a valve port V2 of the stop valve, and a valve port V2 is normally opened, the hydrogen is locked by a locking nut I5, 4 uniformly distributed radial holes II communicated with the middle hole are drilled on the cylinder wall of the lower section of the cut-off valve sleeve 6, and an annular groove f is formed in the outer opening of each radial hole II by turning so that the hydrogen is sent to the pressure reducing valve through a through hole I g and the annular groove h (see figure 3); when the stop valve needs to be closed, the first locking nut 5 can be screwed and loosened, then the stop valve core 4 is screwed in, and the valve port V2 of the stop valve is closed; an O-shaped sealing ring V17 is arranged between the lower end surface of the stop valve sleeve 6 and the corresponding end surface of the valve body 1, and the opening degree of the valve port V1 of the flow stabilizing valve can be finely adjusted by rotating the stop valve sleeve 6.

The pressure reducing valve is positioned at the right lower part of the cuboid of the valve body 1 (see figure 3), and consists of parts such as a right valve sleeve 24, a left valve sleeve 21, a valve seat 34, a slide valve 30, a universal piston ring 33, a diaphragm 23, a second spring 29, a gasket 26, a second lock nut 25 and the like, and the central lines of the parts are on the same axis; the right end external thread of the right valve sleeve 24 is screwed with the corresponding internal thread of the valve body 1, the outer cylinder at the left end is matched in a corresponding hole of the valve body 1 in a sliding way and is provided with an O-shaped sealing ring six 27, the center of the left side is provided with a stepped blind hole, the cylinder wall of the blind hole is drilled with 4 uniformly distributed radial holes four j, and the outer opening of each radial hole four j is turned with an annular groove so as to send the decompressed hydrogen to the electromagnetic valve through a through hole two k; the shape of the left valve pocket 21 is stepped, the diameter is big right and small left, the center of the left and right cylinders is provided with a pit, the middle of the two pits is a partition wall w, the right cylinder is matched in the corresponding hole of the valve body 1 in a sliding way and is provided with two O-shaped sealing rings three 22, the cylinder wall of the right cylinder is drilled with 4 uniformly distributed radial holes five l, the outer opening of the radial holes five l is provided with an annular groove in a turning way, so that the right pit is communicated with the outside through the through hole three m and the air hole n on the filter element 32 and the joint 31, and the motion of the slide valve 30 is prevented from being influenced; 4 uniformly distributed radial holes III are drilled on the wall of the left cylinder, a flooding plug ring 33 is arranged in a groove of an inner hole of the partition wall w, the skeleton of the flooding plug ring 33 is made of stainless steel, the surrounding outer skin is made of polytetrafluoroethylene, the friction coefficient of the flooding plug ring 33 and the steel is 0.02, the shape and the structure of the flooding plug ring are similar to those of a U-shaped sealing ring, and the self-sealing performance is good; the excircle of the shoulder blade on the right side of the sliding seat 34 is matched in the inner hole of the left pit of the left sliding sleeve 21 in a sliding manner, the middle part of the right end is provided with an outward convex ball, the outward convex ball and the conical hole on the left end of the sliding valve 30 form a pressure reducing valve port V3, and the sliding seat 34 is made of a material which is softer than that of the sliding valve 30, so that when the pressure reducing valve port V3 is closed under a slightly high pressure, the ball at the right end of the valve seat 34 is slightly deformed, and the sealing is more reliable; the valve rod in the middle section of the slide valve 30 is matched in an inner hole of the universal plug ring 33 in a sliding way, the right end uses two locking nuts 25 to enable the inner ring of the membrane 23 clamped between the two gaskets 26 to be tightly pressed on the shoulder blade of the valve rod to be integrated, the left end is provided with a flange with a larger diameter for limiting the distance of the valve rod moving rightwards, the center is provided with a through hole, and the left end of the through hole is provided with a taper hole; the second spring 29 is arranged between the right end surface of the partition wall w and the gasket 26; tightening the threads of the right sleeve 24 compresses the valve seat 34 against the bottom surface of the corresponding bore and compresses the outer ring of the diaphragm 23 between the right sleeve 24 and the left valve body 21. The working principle of the pressure reducing valve is as follows: when the electromagnetic valve (see fig. 3) positioned at the upper right of the cuboid of the valve body 1 is closed and stops supplying air, the air pressure of the right cavity of the diaphragm 23 is increased, the slide valve 30 is pushed to move leftwards by overcoming the pressure of the second spring 29, the valve port V3 of the pressure reducing valve is closed, and therefore, the downstream of the valve port V3 of the pressure reducing valve is at low pressure; when the electromagnetic valve is opened to supply air to the downstream, the pressure in the right cavity of the diaphragm 23 is reduced, the slide valve 30 moves to the right under the pushing of the second spring 29, the valve port V3 of the pressure reducing valve is gradually opened, the pressure in the right cavity of the diaphragm 23 is increased, when the pressure is balanced with the set pressure of the second spring 29, the opening degree of the valve port V3 of the pressure reducing valve is constant, namely, the throttling and pressure reducing are constant, and the pressure reducing valve has certain pressure output; if the bottle pressure or the output flow changes, the pressure reducing valve can automatically adjust by utilizing the self structure to ensure that the output pressure is basically kept unchanged, when the bottle pressure is reduced, the output air pressure is inevitably reduced at the reducing moment, the force acting on the right side of the diaphragm 23 is reduced, the slide valve 30 moves rightwards under the pushing of the second spring 29, the opening degree of a valve port V3 of the pressure reducing valve is increased, the throttling and pressure reducing effects are reduced, the output pressure is increased to be close to the original set value, and the slide valve 30 obtains new balance at a new position; if the flow rate increases (or decreases), the flow rate through the relief valve port V3 also increases (or decreases), the pressure loss also increases (or decreases), causing the output pressure to decrease (or increase), thereby causing the spool valve 30 to move to the right (or left), the opening of the relief valve port V3 to increase (or decrease), the throttling and pressure reducing effect to decrease (or increase), and the output pressure to increase (or decrease) back to the original set value.

The electromagnetic valve comprises an electromagnet 54, an electromagnetic valve seat 58, an air outlet filter element 59 and other parts, the central lines of all the parts are on the same axis, the cylinder body of the electromagnet 54 is in sliding fit with a corresponding hole on the cuboid of the valve body 1 and is provided with an O-shaped sealing ring eight 55 which is positioned by a retainer ring four 56, the electromagnetic valve is provided with an electromagnet spring 60, and an outgoing cable passes through the corresponding hole on the side surface of the cuboid and is fixed by a lead sealing joint; a sealing gasket is arranged in a blind hole at the front end of the movable iron core of the electromagnet 54, and forms an electromagnetic valve port V4 with an annular edge of a frustum at the left end of the electromagnetic valve seat 58, two through longitudinal grooves (not shown in the figure) are arranged on the cylindrical surface of the movable iron core so as to guide pressure gas to the bottom end of the movable iron core, the electromagnetic valve is of a normally closed type, under the condition of no electrification, the sealing gasket is pressed on the annular edge of the electromagnetic valve seat 58 by spring force and gas thrust, and the electromagnetic valve port V4 is closed; after the power is switched on, the valve port V4 of the electromagnetic valve is opened to supply air to the fuel cell, the air pressure born by the two ends of the movable iron core is balanced, the holding force is just larger than the spring force, and therefore the holding voltage is far smaller than the opening voltage. The electromagnetic valve seat 58 is screwed in a corresponding screw hole of the cuboid of the valve body 1, a cylinder with a slightly smaller diameter at the middle part is slidably matched in the corresponding hole, an O-shaped sealing ring nine 57 is arranged, and a small frustum is arranged at the left end; the right end of the central hole is provided with a screw hole which is connected with a joint of the air outlet pipeline, the left end of the central hole is provided with an axle hole p with a smaller diameter, the middle of the central hole is provided with a flat cylindrical hole, an air outlet filter element 59 is arranged in the hole and is positioned by a check ring, and the taper hole is used for connecting the axle hole p with the flat cylindrical hole; the opening degree of the valve port V4 of the electromagnetic valve after the electromagnet is electrified can be adjusted by rotating the electromagnetic valve seat 58, namely the electromagnetic force for opening the valve port V4 of the electromagnetic valve is adjusted, and the valve is fastened by a cone end screw after the adjustment meets the requirement.

The overpressure safety valve and the overheating safety valve are designed into a whole, are positioned at the left upper part of a cuboid of the valve body 1 and consist of parts such as a safety valve sleeve 49, a safety valve core 47, a spring III 48, a piston 50, a fusible plug block 51, an adjusting stud 53, a locking nut III 52 and the like, and the central lines of the parts are positioned on the same axis; an external thread above the safety valve sleeve 49 is screwed with a corresponding internal thread in a cuboid of the valve body 1, a cylinder below the safety valve sleeve is matched with a corresponding hole in a sliding way, an O-shaped sealing ring is arranged on a shoulder blade at the periphery of the bottom end, a stepped hole is arranged in the center of the O-shaped sealing ring, an internal thread is processed in a large hole, a piston 50 is matched in the small hole in a sliding way, a spring III 48 is arranged between the upper plane of a lower cone of the safety valve core 47 and the lower end surface of the piston 50, the taper of the cone at the lower end part of the safety valve core 47 is the same as the taper of a chamfer above a central hole of the bottom wall of the safety valve sleeve 49, the taper and the chamfer form a safety valve port V5, and the handle end of the safety valve core 47 is loosely matched in a blind hole at the bottom end of the piston 50; the external thread of the adjusting stud 53 is screwed in the internal thread of the large hole of the safety valve sleeve 49, the top end of the adjusting stud is provided with an inner hexagonal hole, the bottom end of the adjusting stud is provided with a pit, a fusible plug block 51 is arranged in the pit, the center of the adjusting stud is provided with a communication hole, the tightness degree of the spring III 48 can be adjusted by rotating the adjusting stud 53 by using an inner hexagonal wrench, namely, the opening pressure of the safety valve is adjusted, the opening pressure of the safety valve is set to be 70MPa, and the safety valve is locked by a locking nut III 52 after being set; four evenly distributed through holes are drilled at proper positions of the cylinder wall of the safety valve sleeve 49, an annular groove is lathed on the outer diameter of an outer opening of each through hole so as to enable the valve cavity to be communicated with the discharge hole B3, internal threads of the discharge hole B3 are connected with a joint of a discharge pipeline, when the pressure of hydrogen in the hydrogen storage bottle exceeds 70MPa, a valve port V5 of the safety valve is opened, and high-pressure hydrogen is discharged outwards through the discharge pipeline so as to prevent the hydrogen storage bottle from overpressure explosion. When the temperature of the combination valve reaches 110 +/-5 ℃, the fusible plug block 51 is melted into liquid and is discharged outwards through the communication hole under the combined action of the spring III 48 and the air pressure in the air bottle, and the thickness of the fusible plug block 51 is larger than the compression amount of the spring III 48, so that the spring III 48 is in a completely relaxed state during discharge and does not obstruct the discharge of hydrogen.

The inflation one-way valve is positioned at the middle lower part of the left side of the cuboid of the valve body 1 and comprises an inflation valve sleeve 46, an inflation inlet filter element 45, a spring IV 43, a valve core 44 and other parts, and the central lines of the parts are on the same axis; the external thread on the major diameter of the inflating valve sleeve 46 is screwed with the corresponding internal thread on the cuboid, the minor diameter is matched with the corresponding hole in a sliding way, and an O-shaped sealing ring is arranged, the center of the inner hole is provided with a shaft hole, the left end of the shaft hole is a step hole, the thread is processed in the large hole and screwed with the external thread of the inflating tool joint, an inflating port filter element 45 is arranged in the small hole and positioned by a check ring, the bottom of the right end hole of the shaft hole is processed with a groove, a valve core 44 is dynamically matched in the hole, the left end of the valve core 44 is a frustum, the taper of the frustum is the same as the taper of the chamfer of the right end of the shaft hole, the two components form an inflating one-way valve port V6, a spring IV 43 is arranged in the blind hole of the center, and four uniformly distributed through holes are drilled on the cylinder wall at the left end of the blind hole, therefore, the one-way valve port V6 is always closed tightly under the combined action of the spring IV 43 and the pressure of the hydrogen storage bottle when the non-gas is not ventilated; four evenly distributed through holes are drilled at proper positions on the wall of the inflation valve sleeve 46, and an annular groove is turned on the excircle of the outer opening of each through hole to lead the hydrogen in the bottle to the deflation valve. When in gas charging, because the air pressure in the bottle is lower, the high-pressure hydrogen gas passes through the filter element 45, overcomes the pressure of the spring IV 43 and the back pressure, and opens the valve port V6 of the one-way valve to charge the hydrogen storage bottle.

The air release valve is positioned at the left lower part of a cuboid of the valve body 1 and comprises an air release valve seat 39, a screw 36, an air release valve core 40, a spring five 35, a locknut four 37 and other parts, the central lines of all the parts are on the same axis, external threads on the major diameter of the air release valve seat 39 are screwed with internal threads of a corresponding hole of the cuboid, a small cylinder is matched with the corresponding hole in a sliding way, a shoulder blade at the top end is provided with an O-shaped sealing ring eleven 41, the two ends of the diameter of the inner hole are large, the middle of the inner hole is small, a groove is formed at the bottom of the upper hole, the air release valve core 40 is movably matched in the hole, the taper of a frustum at the lower end of the air release valve core 40 is the same as that of a chamfer above the small hole at the middle section, the air release valve port V7 is formed by the air release valve and the air release valve, the spring five 35 is arranged in the blind hole, and four uniformly distributed through holes are drilled on the cylinder wall at the bottom of the blind hole; an internal thread is turned in the lower hole of the air release valve seat 39 and is screwed with the external thread of the screw 36, the bottom end of the screw 36 is provided with a hexagon socket, a small cylinder at the upper part is matched with a small hole at the middle section of the air release valve seat 39 in a sliding way, and is provided with an O-shaped sealing ring twelve 38, the small shaft end surface at the top end is opposite to the top surface of the conical table of the air release valve core 40 and is not contacted at ordinary times, therefore, the valve port V7 of the air release valve is closed under the action of the five springs 35 and the internal pressure at ordinary times, four uniformly distributed through holes are drilled near the middle part of the cylinder wall of the air release valve seat 39, the outer port of each through hole is turned with an annular groove to be communicated with the air release hole B4, when the hydrogen in the hydrogen storage bottle needs to be discharged outwards, the fourth locking nut 37 is loosened, the screw 36 is screwed in, the gas valve core 40 is opened at the top, the valve port V7 of the air release valve is opened, the high-pressure hydrogen is discharged outwards through the air release hole B4, this arrangement is very safe because the screw 36 is threaded in and does not shoot out due to high air pressure.

The stainless steel ball 8 and the sealing screw 7 are used for plugging the orifice of the high-pressure channel; the other side of the cylinder of the valve body 1 is drilled with a longitudinal hole z1 and a radial hole z2, the axis of the longitudinal hole z1 is parallel to the axis of the cylinder, the lower end of the longitudinal hole z1 is screwed with the temperature sensor 15 and sealed by a sealing gasket 16, and the lead of the longitudinal hole z1 passes through the longitudinal hole z1 and the radial hole z2 to the outside of the valve and is fixed by a lead sealing joint 18.

In order to ensure that the valve port is reliably sealed under ultrahigh pressure, the contact surfaces of the valve core and the valve seat are subjected to matched grinding, the surface roughness is less than or equal to 0.1 micron, one of the valve core and the valve seat is made of a softer material, for example, the valve core material in the patent is stainless steel 316L, the valve seat material is copper alloy and aluminum alloy, and a valve synthetic resin with lower hardness, such as polyimide resin and the like, can be inlaid on the valve seat, so that the contact surfaces are more attached due to the deformation of the softer material under high pressure.

In addition to the above-mentioned embodiments, the technical features or technical data of the present invention may be reselected and combined to form new embodiments within the scope disclosed in the claims and the specification of the present invention, and the embodiments of the present invention not described in detail can be easily implemented by those skilled in the art without creative efforts, so the embodiments not described in detail should be regarded as specific embodiments of the present invention and are within the protection scope of the present invention.

Claims

1. The utility model provides a vehicle-mounted superhigh pressure hydrogen storage cylinder combination valve, includes valve body (1), its characterized in that: a flow stabilizing valve, a stop valve, a pressure reducing valve, an electromagnetic valve, an inflation one-way valve, an overpressure safety valve, an overheating safety valve, an air release valve, an inflation inlet filter element, an air outlet filter element, a temperature sensor and an in-bottle air pressure and output air pressure sensor interface are arranged in the valve body (1); during inflation, the high-pressure hydrogen opens the inflation one-way valve through the inflation inlet filter element (45) and inflates the hydrogen storage bottle through the corresponding channel in the valve body (1); when supplying gas, the high-pressure hydrogen in the hydrogen storage bottle supplies gas to the fuel cell through the gas supply filter element (14), the flow stabilizing valve, the stop valve, the pressure reducing valve, the electromagnetic valve and the gas outlet filter element (59); the flow stabilizing valve is used for reducing fluctuation of output flow, and the pressure reducing valve is used for adjusting output pressure to meet the requirements of the fuel cell.

2. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 1, characterized in that: the valve body (1) is composed of an upper part and a lower part which are vertical to each other, the upper part is a cuboid, the lower part is a step-shaped cylinder, the external thread of the upper cylinder is screwed with the internal thread above the bottle mouth of the hydrogen storage bottle, the lower cylinder is matched with the inner hole below the bottle mouth in a sliding way, and an O-shaped sealing ring I (12) and a check ring I (11) are arranged in the annular groove of the lower cylinder; all parts are arranged in the valve body (1) and are communicated by corresponding channels in the valve body, and the channel openings are blocked by steel balls (8) and sealing screws (7).

3. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 1 or 2, characterized in that: a stepped longitudinal hole is arranged above one side of the lower cylinder, the longitudinal hole is parallel to the axis of the lower cylinder and is eccentrically arranged, a flow stabilizing valve is arranged in the small hole, hydrogen in the hydrogen storage bottle is fed to the flow stabilizing valve through an air inlet hole (a), and an air inlet filter element (14) is arranged at the lower end of the air inlet hole (a) and is positioned by a retainer ring II (13); the flow stabilizing valve comprises a flow stabilizing valve core (9), a spring I (10) and a taper hole on the lower end face of a stop valve sleeve (6) above the spring I, and the central lines of all parts are on the same axis; the major diameter of the lower part of the flow stabilizing valve core (9) is in dynamic fit with a corresponding hole in the valve body (1), the outer diameter of the flow stabilizing valve core is provided with two annular balance grooves, the top end of a small shaft at the upper part is provided with a frustum, the taper angle of the frustum is the same as the taper angle of a taper hole on the lower end face of the stop valve sleeve (6), the frustum and the conical frustum form a flow stabilizing valve port (V1), the center of the bottom end of the flow stabilizing valve core (9) is provided with a bottom hole (b), the hole wall of the bottom hole (b) is provided with four radial holes I (c), and the top end of the bottom hole (b) is provided with a through small hole (d); the first spring (10) is arranged between the shoulder blade of the large-diameter shaft and the lower end face of the stop valve sleeve (6).

4. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 3, characterized in that: a stop valve is arranged in a large hole of the stepped longitudinal hole, the stop valve comprises a stop valve sleeve (6), a stop valve core (4) and a locking nut I (5), and the central line of each part is consistent with that of the flow stabilizing valve; the two ends of the outer diameter of the stop valve sleeve (6) are small, the middle of the outer diameter of the stop valve sleeve is large, a lower section of a cylinder is matched in a corresponding hole of the valve body (1) in a sliding mode and is provided with an O-shaped sealing ring II (19) and an O-shaped sealing ring III (20), an external thread of a middle section of the cylinder is screwed with a corresponding internal thread of the valve body (1), a step-shaped through hole is formed in the center of the lower end face of the cylinder, a taper hole is formed in the center of the step-shaped through hole and is screwed with an external thread of the stop valve core (4), a middle hole of the stop valve core is matched with a valve rod of the stop valve core (4) in a sliding mode and is provided with an O-shaped sealing ring IV (2) and a check ring III (3), the lower end of the valve rod of the stop valve core (4) is provided with a frustum, the taper degree of the frustum is the same as that of the taper hole at the bottom end of the middle hole of the stop valve sleeve (6), the two form a stop valve port (V35 2), the stop valve port (V2) is normally opened and is locked by a locking nut I (5), 4 uniformly distributed on the lower section of the cylinder wall of the stop valve sleeve (6), A radial hole II (e) communicated with the middle hole, wherein an annular groove (f) is formed in an outer opening of the radial hole II (e); and an O-shaped sealing ring V (17) is arranged between the lower end surface of the stop valve sleeve (6) and the end surface of the corresponding hole in the valve body (1).

5. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 1 or 2, characterized in that: a pressure reducing valve is arranged at the lower right of the cuboid of the valve body (1), the pressure reducing valve comprises a right valve sleeve (24), a left valve sleeve (21), a pressure reducing valve seat (34), a slide valve (30), a universal plug ring (33), a diaphragm (23), a second spring (29), a gasket (26) and a second locking nut (25), and the central lines of all parts are on the same axis; the external thread at the right end of the right valve sleeve (24) is screwed with the corresponding internal thread in the valve body (1) and is tightly fixed by a taper end screw (28), the outer cylinder at the left end is in sliding fit in the corresponding hole of the valve body (1) and is provided with an O-shaped sealing ring six (27), the center of the left side is provided with a stepped blind hole, the cylinder wall is provided with 4 uniformly distributed radial holes four (j), and the outer opening of the radial hole four (j) is provided with an annular groove; the left valve sleeve (21) is in a step shape, the diameter of the left valve sleeve is larger on the right and smaller on the left, a concave pit is formed in the center of each of the left and right cylinders, a partition wall (w) is arranged in the middle of each concave pit, the right cylinder is slidably matched in a corresponding hole of the valve body (1) and is provided with two O-shaped sealing rings (seven) (22) for sealing, 4 uniformly distributed radial holes (five (l) are formed in the wall of the right cylinder, and an annular groove is formed in an outer opening of each radial hole (five (l); the wall of the left cylinder is provided with 4 uniformly distributed radial holes III (i), and a universal plug ring (33) is arranged in a groove of an inner hole of the partition wall (w); the outer cylinder of the shoulder blade on the right side of the pressure reducing valve seat (34) is matched in an inner hole of a left pit of the left sliding sleeve (21) in a sliding manner, the middle part of the right end is an outward convex ball which forms a pressure reducing valve port (V3) with a taper hole on the left end of the sliding valve (30), and the material hardness of the pressure reducing valve seat (34) is lower than that of the sliding valve (30); a valve rod at the middle section of the slide valve (30) is arranged in an inner hole of the universal plug ring (33) in a sliding way, the inner ring of a membrane (23) clamped between two gaskets (26) is tightly pressed on the shoulder blade of the valve rod by using two locking nuts (25) at the right end to enable the two gasket to be integrated, a flange with a larger diameter is arranged at the left end, a through hole is formed in the center, and a taper hole is formed at the left end of the through hole; the second spring (29) is arranged between the right end surface of the partition wall (w) and the gasket (26).

6. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 1 or 2, characterized in that: an electromagnetic valve is arranged at the upper right of the cuboid of the valve body (1), the electromagnetic valve comprises an electromagnet (54), an electromagnetic valve seat (58) and an air outlet filter element (59), and the central lines of all parts are on the same axis; the cylinder body of the electromagnet (54) is arranged in a corresponding hole of the valve body (1) in a sliding mode, an O-shaped sealing ring eight (55) is arranged and positioned by a retainer ring four (56), and the outgoing cable penetrates through the corresponding hole in the side face of the cuboid and is fixed by a lead sealing joint; a sealing gasket is arranged in a blind hole at the front end of the movable iron core of the electromagnet (54), and forms an electromagnetic valve port (V4) with an annular edge of a frustum at the left end of the electromagnetic valve seat (58); the surface of the movable iron core cylinder is provided with two through longitudinal holes; the electromagnetic valve seat (58) is screwed in a corresponding screw hole of a cuboid of the valve body (1), a cylinder with a slightly smaller diameter at the middle part is slidably matched in the corresponding hole, an O-shaped sealing ring nine (57) is arranged, and a small frustum is arranged at the left end; the right end of the center hole is provided with a screw hole which is connected with a joint of the air outlet pipeline, the left end of the center hole is provided with an axle hole (p), the middle of the center hole is provided with an oblate cylindrical hole, an air outlet filter element (59) is arranged in the hole and is positioned by a retainer ring, the axle hole (p) is connected with the oblate cylindrical hole through a taper hole, and the position of the electromagnetic valve seat (58) is set by a taper end screw.

7. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 1 or 2, characterized in that: the overpressure safety valve and the overheating safety valve are arranged at the upper left of the cuboid and are designed into a whole, the overpressure safety valve and the overheating safety valve comprise a safety valve sleeve (49), a safety valve core (47), a spring III (48), a piston (50), a fusible plug block (51), an adjusting stud (53) and a locking nut III (52), and the central lines of all parts are located on the same axis; the external thread of the safety valve sleeve (49) is screwed with the internal thread of the corresponding hole, the lower cylinder is matched with the corresponding hole in a sliding way, the shoulder blade at the bottom end is provided with a sealing ring, the center of the sealing ring is provided with a stepped hole, the large hole of the stepped hole is provided with the internal thread, and the small hole is matched with a piston (50) in a sliding way; a third spring (48) is arranged between the upper plane of the lower cone of the safety valve core (47) and the lower end surface of the piston (50), the taper of the cone at the lower end part of the safety valve core (47) is the same as the taper of a chamfer above the central hole of the bottom wall of the safety valve sleeve (49), the two taper form a safety valve port (V5), and the handle end of the safety valve core (47) is loosely matched in a blind hole at the bottom end of the piston (50); the external thread of the adjusting stud (53) is screwed in the internal thread of the large hole of the safety valve sleeve (49), the top end is provided with an inner hexagonal hole, the bottom end is provided with a pit, a fusible plug block (51) is arranged in the pit, and the center is provided with a communicating hole; four uniformly distributed through holes are arranged on the wall of the safety valve sleeve (49), and an annular groove is arranged on the outer diameter of an outer opening of each through hole and communicated with a discharge hole (B3).

8. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 1 or 2, characterized in that: the inflation one-way valve is arranged at the middle lower part of the left side of the cuboid, the inflation one-way valve comprises an inflation valve sleeve (46), a spring four (43) and an inflation valve core (44), and the central lines of all parts are on the same axis; the outer thread on the major diameter of the inflation valve sleeve (46) is screwed with the corresponding inner thread on the cuboid, the minor diameter is matched with the corresponding hole in a sliding mode, and an O-shaped sealing ring ten (42) is arranged, the left end of a shaft hole at the center of an inner hole is a stepped hole, the inner thread is arranged in a large hole, an inflation inlet filter element (45) is installed in the small hole, the check ring is used for positioning, a groove is formed in the hole bottom at the right end of the shaft hole, an inflation valve core (44) is dynamically arranged in the hole, the left end of the inflation valve core (44) is a frustum, the taper of the frustum is the same as that of the chamfer at the right end of the shaft hole, a one-way valve opening (V6) is formed by the two, a spring four (43) is arranged in a blind hole at the center, four uniformly distributed through holes are formed in the wall at the left end of the blind hole, four uniformly distributed radial holes are formed in the wall of the inflation valve sleeve (46), and an annular groove is formed in the excircle of an outer opening of the hole.

9. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 1 or 2, characterized in that: the air release valve is arranged at the left lower part of the cuboid and comprises an air release valve seat (39), a screw (36), an air release valve core (40), a spring five (35) and a locking nut four (37), and the central lines of all parts are positioned on the same axis; an external thread on the large diameter of the air release valve seat (39) is screwed with an internal thread of a corresponding hole, a small cylinder is matched with the corresponding hole in a sliding way, an O-shaped sealing ring eleven (41) is arranged on a shoulder blade at the top end, the diameter of two ends of an inner hole is large, the diameter of the middle of the inner hole is small, an annular groove is arranged at the bottom of the upper hole, an air release valve core (40) is movably matched in the hole, the taper of a frustum at the lower end of the air release valve core (40) is the same as that of a chamfer above a small hole at the middle section, the two taper form an air release valve port (V7), a spring five (35) is arranged in a blind hole of the air release valve core (40), and four uniformly distributed through holes are arranged on the wall of the bottom of the blind hole; the internal thread in the lower hole is screwed with the external thread of the screw (36), a small cylinder above the screw (36) is matched with the small hole in the middle section of the air release valve seat (39) in a sliding way, an O-shaped sealing ring twelve (38) is arranged, and the top surface of the small shaft at the top end is opposite to the top surface of the frustum of the air release valve core (40) and is not contacted at ordinary times; the middle part of the cylinder wall of the air release valve seat (39) is provided with four uniformly distributed through holes, and the outer diameter of the outer opening of each through hole is provided with an annular groove which is communicated with an air release hole (B4).

10. The vehicle-mounted ultrahigh-pressure hydrogen storage cylinder combination valve according to claim 1 or 2, characterized in that: the other side of the cylinder of the valve body (1) is also provided with a longitudinal hole (z 1) and a transverse hole (z 2), the lower end of the longitudinal hole (z 1) is in threaded connection with the temperature sensor (15) and is sealed by a sealing gasket (16), and the lead of the longitudinal hole (z 1) and the transverse hole (z 2) is led out of the combined valve and is fixed by a lead sealing joint (18).