A regulating valve for high pressure hydrogen

Abstract

The present application relates to the technical field of regulating valves, and in particular to a regulating valve for high-pressure hydrogen, wherein the regulating valve comprises a regulating mechanism and an actuator, wherein the regulating mechanism is used to communicate with a delivery pipeline, and the actuator is used to control the operation of the regulating mechanism; the regulating mechanism comprises a regulating valve body and a pressure reducing assembly, wherein a containing chamber is provided inside the regulating valve body, the pressure reducing assembly is fixed in the containing chamber of the regulating valve body, and the pressure reducing assembly is provided with a pressure reducing flow channel for the circulation of high-pressure hydrogen. In the present application, the high pressure difference acting on the valve port of the regulating valve body is quickly decomposed by the pressure reducing assembly, so as to control the flow rate of high-pressure hydrogen, weaken the scouring and corrosion of the valve seat and valve core by high-pressure hydrogen, and improve the service life of the regulating valve.

Description

Technical Field

[0001] The present application relates to the technical field of regulating valves, and in particular to a regulating valve for high-pressure hydrogen. Background Art

[0002] High-pressure hydrogen transportation is one of the key technologies in the hydrogen energy industry, which involves the storage, transportation and safety management of hydrogen. When high-pressure hydrogen is transported through pipelines, the regulating valves on the pipelines are used to control the on-off and flow rate of high-pressure hydrogen.

[0003] Because the pipeline transports high-pressure hydrogen, there is a high pressure difference between the front and back of the regulating valve; therefore, when the high-pressure hydrogen flows through the regulating valve, the high pressure difference on both sides of the valve seat will increase the scouring force of hydrogen on the valve core and valve seat, and the valve core and valve seat inside the regulating valve will face more severe scouring and wear. This scouring effect will not only accelerate the wear of the valve core and valve seat, but may also cause the sealing performance between the valve core and valve seat to decrease, thereby affecting the sealing effect and service life of the entire regulating valve. Summary of the invention

[0004] In order to improve the ability of the regulating valve to resist the scouring effect of high-pressure hydrogen and reduce the wear of the valve core and the valve seat, the present application provides a regulating valve for high-pressure hydrogen.

[0005] The present application provides a high-pressure hydrogen regulating valve, which adopts the following technical solution:

[0006] A regulating valve for high-pressure hydrogen, comprising a regulating mechanism and an actuator, wherein the regulating mechanism is used to communicate with a delivery pipeline, and the actuator is used to control the operation of the regulating mechanism; the regulating mechanism comprises a regulating valve body and a pressure reducing component, wherein a containing chamber is provided inside the regulating valve body, the pressure reducing component is fixedly arranged in the containing chamber of the regulating valve body, the pressure reducing component is arranged on the flow path of the high-pressure hydrogen, and the pressure reducing component is provided with a pressure reducing flow channel for the high-pressure hydrogen to flow; the pressure reducing component comprises a sleeve, a first plate and a second plate; the sleeve is fixedly connected to the regulating valve body, and the first plate and the second plate are provided with a plurality of Along the flow direction of the high-pressure hydrogen, a plurality of the second plates and the first plates are alternately arranged on the inner circumferential wall of the sleeve, the first plate and the second plate divide the pressure reducing channel into a plurality of pressure reducing chambers, the first plate is provided with a first through hole for the high-pressure hydrogen to pass through, the second plate is provided with a second through hole for the high-pressure hydrogen to pass through, the first through hole and the second through hole are alternately arranged; the second plate is slidably connected to the inner circumferential wall of the sleeve, and the first plate is fixedly connected to the sleeve; the actuator drives the second plate to slide, and the space of the pressure reducing channel decreases as the opening of the regulating valve body increases.

[0007] By adopting the above technical solution, the pressure reduction component allows high-pressure hydrogen to be buffered step by step during the flow process, and the energy of high-pressure hydrogen is continuously dissipated. Each time the high-pressure hydrogen flows through a pressure reduction chamber, its pressure is reduced by one level due to the throttling and pressure reduction effect, thereby decomposing the original large pressure difference into multiple smaller pressure differences. Therefore, when high-pressure hydrogen flows through the regulating valve, the pressure difference on both sides of the valve seat can be reduced to weaken the flushing force of high-pressure hydrogen on the valve core and valve seat and reduce the wear of the valve core and valve seat.

[0008] As the opening of the control valve body increases, the flow rate and flow velocity of the high-pressure hydrogen will increase, causing the high-pressure hydrogen to have a greater scouring and corrosion effect on the valve seat and valve core, thereby affecting the service life of the control valve.

[0009] In the present technical solution, when the opening of the regulating valve body increases, the actuator will drive the second plate to move to reduce the space of the pressure reducing flow channel, reduce the resistance encountered by high-pressure hydrogen passing through the pressure reducing component, and further increase the dissipation of high-pressure hydrogen energy, so as to improve the pressure reducing effect of the pressure reducing component on hydrogen.

[0010] That is, by changing the relative position of the first plate and the second plate, the regulating valve can dynamically change the size of the pressure-reducing flow channel space in the pressure-reducing component according to the actual opening size, so as to change the resistance of the high-pressure hydrogen in the pressure-reducing component and the dissipated fluid energy. Therefore, when the staff gradually increases the opening of the regulating valve, a stable low pressure difference can be maintained on both sides of the valve port, so as to reduce the scouring and corrosion of the valve seat and valve core by the high-pressure hydrogen when the opening of the regulating valve becomes larger. That is, through the coordinated cooperation of the first plate and the second plate, the pressure reduction and speed control capabilities of the regulating valve can be improved.

[0011] Optionally, the regulating valve body includes a valve cover, a valve seat, a valve core, a valve stem, a sealing member, a push rod and a pressure reducing assembly; the valve body and the valve cover are covered and fixed, a mounting seat is provided inside the valve body, the mounting seat divides the accommodating chamber into a first accommodating chamber and a second accommodating chamber, and the mounting seat is provided with a mounting hole for installing the valve seat; the valve seat is provided with a connecting hole for connecting the first accommodating chamber and the second accommodating chamber; the valve stem is passed through the valve cover, and the sealing member is provided between the valve cover and the valve stem, The main body of the valve core is arranged in the second accommodating chamber, the valve core and the push rod are fixedly arranged at both ends of the valve stem, the valve core is used to abut against the valve seat, the valve core is used to block the connecting hole, the push rod is used to be fixedly connected to the actuator, and the actuator is used to drive the valve core to approach or move away from the valve seat; the pressure reducing assembly is fixedly arranged in the second accommodating chamber, the pressure reducing assembly is sleeved on the outer periphery of the valve stem, the first plate is slidably connected to the valve stem, and the second plate is fixedly connected to the valve stem.

[0012] By adopting the above technical solution, when the actuator drives the valve stem and the valve core away from the valve seat, the valve core and the valve seat are separated from each other, and the high-pressure hydrogen flows along the axis direction of the valve core and the valve stem. The second plate is fixedly connected to the valve stem, so that the second plate moves together with the valve core.

[0013] The hydrogen gradually flows through the pressure-reducing chamber surrounded by the adjacent first plates, so that the actual pressure difference before and after the regulating valve is uniformly reduced along the axial direction of the valve stem and the valve core, that is, the high pressure difference acting on the valve port is quickly decomposed, so that there is no continuous high pressure difference at the valve port until the regulating valve works normally; so as to control the flow rate of high-pressure hydrogen, weaken the scouring and corrosion of the valve seat and valve core by high-pressure hydrogen, and increase the service life of the regulating valve.

[0014] Optionally, the pressure reducing assembly also includes a limit member, which is fixedly connected to the valve stem and is fixed on both sides of the second plate along the length direction of the valve stem, and the second plate is rotatably abutted against the valve stem and the limit member; a plurality of riflings are arranged at intervals on the inner circumferential wall of the sleeve, and the number of the riflings corresponds to the number of the second plates, and a guide groove matching the rifling is opened on the outer periphery of the second plate, and the second plate spirally rotates along the rifling; when the valve core is away from the valve seat, the distance between adjacent first penetration holes and second penetration holes decreases.

[0015] When the regulating valve is opened for a period of time, when the amount of high-pressure hydrogen filling the downstream delivery pipeline is large, the actual pressure difference between the upstream delivery pipeline and the downstream delivery pipeline becomes smaller, so that the scouring and corrosion of the valve seat and valve by the high-pressure hydrogen also becomes weaker; at this time, the pressure reduction requirement of the regulating valve by the high-pressure hydrogen becomes lower, while the fluidity requirement of the regulating valve becomes higher to ensure the delivery volume of the high-pressure hydrogen.

[0016] By adopting the above technical solution, when the valve stem drives the second plate to move away from the valve seat, the upper limit groove of the second plate cooperates with the rifling, so that the second plate rotates around the valve stem; that is, the second plate rotates spirally, and the distance between the first through-hole and the second through-hole decreases, the resistance to the flow of high-pressure hydrogen in the pressure-reducing component becomes smaller, and the fluid energy dissipated by the high-pressure hydrogen in the pressure-reducing component is lower, so that the high-pressure hydrogen flows through the pressure-reducing component to the downstream delivery pipeline to ensure the flow rate of high-pressure hydrogen. That is, through the cooperation of the second plate and the rifling, the pressure reduction and speed control capabilities of the regulating valve can be improved.

[0017] Optionally, the number of the first penetration holes is an even number, and a plurality of the first penetration holes are symmetrically arranged in pairs on both sides of the valve stem, a virtual connecting line of the first penetration holes arranged in pairs is a first virtual connecting line, and high-pressure hydrogen flows out from two first penetration holes respectively and then offsets each other.

[0018] By adopting the above technical solution, the first penetration holes are arranged in pairs on both sides of the valve stem, so that when the high-pressure hydrogen passes through two different first penetration holes of the same first plate, the high-pressure hydrogen will move along the first virtual connecting line, so that the two streams of high-pressure hydrogen will collide with each other to achieve a gradual reduction in the pressure of the high-pressure hydrogen. The multiple collisions occurring in the pressure reducing component can limit the flow rate of the high-pressure hydrogen.

[0019] Optionally, the number of the second penetration holes is an even number, and a plurality of the second penetration holes are symmetrically arranged in pairs on both sides of the valve stem, and a virtual connecting line of the second penetration holes arranged in pairs is a second virtual connecting line, and high-pressure hydrogen flows out from two second penetration holes respectively and then impacts each other; when the valve core moves away from the valve seat, the angle between adjacent first virtual connecting lines and second virtual connecting lines decreases.

[0020] By adopting the above technical solution, after the two streams of high-pressure hydrogen pass through the two second holes on the second plate respectively, they will produce a collision along the second virtual connecting line; thereby achieving a gradual reduction in the pressure of the high-pressure hydrogen. The multiple collisions occurring in the pressure-reducing component can limit the flow rate of the high-pressure hydrogen, so that the pressure-reducing component can convert a large pressure difference into multiple small pressure differences while ensuring that the regulating valve has good flow performance.

[0021] Optionally, the diameter of the first penetration hole is the same as that of the second penetration hole; when the valve core and the valve seat are fully opened, the first plate member abuts against the second plate member, and the first penetration hole and the second penetration hole are coaxially arranged.

[0022] By adopting the above technical solution, when the filling level of high-pressure hydrogen in the downstream transmission pipeline is high, the staff can fully open the regulating valve so that the first penetration hole and the second penetration hole are coaxially arranged to reduce the resistance of the pressure reducing component to the high-pressure hydrogen, so that the high-pressure hydrogen can quickly penetrate the regulating valve to flow into the downstream transmission pipeline to ensure the transmission flow rate of the high-pressure hydrogen.

[0023] Optionally, the limit member includes a first limit member and a second limit member, the first limit member and the second limit member are arranged vertically, and the first limit member and the second limit member are integrally formed; the valve stem is provided with a first limit groove for accommodating the first limit member, the first limit member is arranged flush with the outer periphery of the valve stem, and the first limit member is fixedly connected to the valve stem by bolts; the second plate is provided with a second limit groove for accommodating the second limit member, the second limit member is arranged flush with the surface of the second plate, and the second limit member is rotatably abutted against the second plate.

[0024] By adopting the above technical solution, the second plate is fixedly connected to the valve stem through the limiting member, thereby making it convenient for the staff to install the second plate.

[0025] Optionally, the connecting hole of the valve seat is a stepped hole, and along the vertical downward direction, the connecting hole is divided into a first connecting hole and a second connecting hole, the diameter of the first connecting hole is smaller than the diameter of the second connecting hole, and the valve core is used to block the first connecting hole.

[0026] By adopting the above technical solution, when the valve core is separated from the valve seat, the high-pressure hydrogen will flow through the second connecting hole and the first connecting hole in sequence, and the high-pressure hydrogen will mainly impact the side wall and bottom wall of the second connecting hole, that is, the impact position of the high-pressure hydrogen on the valve seat is shifted, and the main impact position is shifted from the side wall of the hole abutting the valve core to the side wall and bottom wall of the second connecting hole that is not abutting the valve core. By setting the connecting holes as the first connecting hole and the second connecting hole, not only the pressure reduction effect is achieved, but also the scouring and wear of the important position of the valve seat by the high-pressure hydrogen can be reduced, the sealing between the valve core and the valve seat can be improved, and the service life of the regulating valve can be increased.

[0027] Optionally, an annular groove is provided on the outer periphery of the valve stem, and the annular groove is arranged on a side of the valve stem close to the valve core.

[0028] By adopting the above technical solution, an annular groove is provided on the side of the valve stem close to the valve core, so that when hydrogen flows through the valve core and the valve stem, the annular groove has the effect of retaining and disturbing the hydrogen, so that part of the hydrogen and the newly entered hydrogen have an offset effect; thereby, along the flow direction of the hydrogen, the pressure difference on both sides of the valve core can be reduced to reduce the scouring and corrosion of the valve core by hydrogen.

[0029] Optionally, a spiral blade is provided on the outer periphery of the valve stem, and the spiral blade is arranged between the pressure reducing assembly and the valve core, and an avoidance gap is provided between the spiral blade and the pressure reducing assembly and the valve core.

[0030] By adopting the above technical solution, when high-pressure hydrogen acts on the valve stem, these external loads and their coupling effects will cause vortex-induced vibration of the valve stem, thereby reducing the fatigue life of the valve stem. By arranging spiral blades on the periphery of the valve stem, the flow of hydrogen is guided by the spiral blades to reduce the effect of hydrogen on the valve stem, alleviate the vortex-induced vibration of the valve stem and valve core, and increase the service life of the valve stem and valve core.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] When the actuator drives the valve stem and valve core away from the valve seat, and the valve core and valve seat are separated from each other, the high-pressure hydrogen flows along the axis direction of the valve core and valve stem. As the hydrogen gradually flows through the pressure-reducing chamber surrounded by the adjacent first plates, the actual pressure difference before and after the regulating valve is evenly reduced along the axis direction of the valve stem and valve core, that is, the high pressure difference acting on the valve port is quickly decomposed, so that there is no continuous high pressure difference at the valve port until the regulating valve works normally; so as to control the flow rate of high-pressure hydrogen, weaken the scouring and corrosion of the valve seat and valve core by high-pressure hydrogen, and increase the service life of the regulating valve;

[0033] By changing the relative positions of the first plate and the second plate, the regulating valve can dynamically change the size of the actual pressure reduction chamber in the pressure reduction assembly according to the actual opening size, so as to change the resistance of the high-pressure hydrogen in the pressure reduction assembly and the dissipated fluid energy; so that when the staff gradually increase the opening of the regulating valve, the two sides of the valve port can maintain a stable low pressure difference; to reduce the erosion and corrosion of the valve seat and valve core by the high-pressure hydrogen when the opening of the regulating valve becomes larger. That is, through the coordinated cooperation of the first plate and the second plate, the pressure reduction and speed control capabilities of the regulating valve can be improved;

[0034] When the filling level of high-pressure hydrogen in the downstream transmission pipeline is high, the staff can fully open the regulating valve so that the first penetration hole and the second penetration hole are coaxially arranged to reduce the resistance of the pressure reduction component to the high-pressure hydrogen, so that the high-pressure hydrogen can quickly penetrate the regulating valve to flow into the downstream transmission pipeline to ensure the transmission flow rate of the high-pressure hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a cross-sectional view before adjusting the valve opening in Example 1.

[0036] Figure 2 This is a cross-sectional view after adjusting the valve opening in Example 1.

[0037] Figure 3 It is a schematic diagram of the regulating valve structure in Example 1.

[0038] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0039] Figure 5 yes Figure 2 Enlarged view of point B in the middle.

[0040] Figure 6 yes Figure 5 Enlarged view of point C in the middle.

[0041] Figure 7 It is a cross-sectional view of the regulating valve in Example 2.

[0042] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0043] Fig. 9 This is a schematic diagram before the regulating valve opening in Example 2.

[0044] Fig.10 It is a schematic diagram showing the matching relationship between the second plate and the rifling in Example 2.

[0045] Fig.11 It is a schematic diagram after adjusting the valve opening in Example 2.

[0046] Fig.12 It is a cross-sectional view of the regulating valve in Example 3.

[0047] Fig.13 It is a cross-sectional view of the regulating valve in Example 4.

[0048] Description of reference numerals: 1. regulating mechanism; 11. valve body; 111. accommodating chamber; 1111. first accommodating chamber; 1112. second accommodating chamber; 112. mounting seat; 12. valve cover; 13. valve seat; 131. communicating hole; 1311. first communicating hole; 1312. second communicating hole; 14. valve core; 141. annular groove; 15. valve stem; 151. first limiting groove; 16. sealing member; 17. push rod; 18. pressure reducing assembly; 181. sleeve; 1811. The first step hole; 1812, the second step hole; 182, the first plate; 1821, the first through hole; 1822, the first virtual connecting line; 183, the second plate; 1831, the second through hole; 1832, the second virtual connecting line; 1833, the guide groove; 1834, the second limiting groove; 184, the pressure reduction chamber; 19, the limiting member; 191, the first limiting member; 192, the second limiting member; 2, the actuator; 3, the spiral blade; 4, the limiting ring; 5, the rifling. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1 -13 Provide further details of this application.

[0050] Example 1

[0051] The present application embodiment discloses a high pressure hydrogen regulating valve. Figure 1 and Figure 2 The regulating valve for high-pressure hydrogen includes a regulating mechanism 1 and an actuator 2. The regulating mechanism 1 is used to be connected with a delivery pipeline, and the actuator 2 is used to control the operation of the regulating mechanism 1.

[0052] Reference Figure 1 and Figure 2The regulating mechanism 1 includes a regulating valve body and a pressure reducing component 18. The pressure reducing component 18 is arranged inside the regulating valve body. The pressure reducing component 18 is arranged on the flow path of the high-pressure hydrogen. The pressure reducing component 18 is provided with a pressure reducing flow channel for the high-pressure hydrogen to flow.

[0053] Reference Figure 1 and Figure 2 The regulating valve body includes a valve body 11, a valve cover 12, a valve seat 13, a valve core 14, a valve stem 15, a sealing member 16 and a push rod 17.

[0054] Reference Figure 1 and Figure 2 The valve body 11 and the valve cover 12 are fixed together, and a containing chamber 111 is provided inside the valve body 11. Along the flow direction of the high-pressure hydrogen, the mounting seat 112 inside the valve body 11 divides the containing chamber 111 into a first containing chamber 1111 and a second containing chamber 1112. The mounting seat 112 is provided with a mounting hole for mounting the valve seat 13; the valve seat 13 is provided with a connecting hole 131 for connecting the first containing chamber 1111 and the second containing chamber 1112. In this embodiment, the arrow indicates the flow direction of the high-pressure hydrogen, and the high-pressure hydrogen flows from left to right.

[0055] Reference Figure 1 and Figure 2 , the valve stem 15 is inserted into the valve cover 12, and the sealing member 16 is arranged between the valve cover 12 and the valve stem 15, and the main body of the valve core 14 is arranged in the second accommodating chamber 1112. Along the length direction of the valve core 14, the valve core 14 and the push rod 17 are fixedly arranged at both ends of the valve stem 15, the valve core 14 is used to seal against the valve seat 13, the valve core 14 is used to block the connecting hole 131, and the push rod 17 is used to be fixedly connected with the actuator 2, and the actuator 2 is used to drive the valve core 14 to approach or move away from the valve seat 13. In the prior art, the sealing member 16 between the valve stem 15 and the valve cover 12 has a variety of structures, such as sealing fillers, bellows, etc.; the present application does not limit the sealing member 16 between the valve stem 15 and the valve cover 12.

[0056] Reference Figure 3 The pressure reducing assembly 18 is fixedly arranged in the second accommodating chamber 1112 and sleeved on the outer periphery of the valve stem 15. The pressure reducing assembly 18 includes a sleeve 181, a first plate 182 and a second plate 183.

[0057] Reference Figure 3 to Figure 4, the sleeve 181 is fixed on the mounting seat 112. In this embodiment, a limiting ring 4 is provided on the side of the sleeve 181 away from the valve seat 13, and a groove for accommodating the limiting ring 4 is provided on the inner wall of the valve body 11. The limiting ring 4 abuts against the sleeve 181, so that the sleeve 181 is fixed on the mounting seat 112. In this embodiment, the limiting ring 4 is a four-open ring; that is, the circular ring is divided into four arc-shaped pieces, so that the arc-shaped pieces can be placed in the groove of the inner wall of the sleeve 181, so that the four arc-shaped pieces are spliced ​​into a circular ring in the groove to play a limiting role; the limiting ring 4 has been widely used in regulating valves, and this application does not describe the specific installation method of the limiting ring 4.

[0058] Reference Figure 3 The first plate 182 and the second plate 183 are both horizontally arranged, and there are a plurality of the first plate 182 and the second plate 183; along the flow direction of the high-pressure gas, the second plate 183 and the first plate 182 are alternately arranged inside the sleeve 181; that is, the second plate 183 is arranged at the bottom of the sleeve 181, and the first plate 182 is arranged at the top of the bottom of the sleeve 181.

[0059] Reference Figure 3 The adjacent first plate 182 and the second plate 183 divide the pressure reducing flow path of the pressure reducing assembly 18 into a plurality of pressure reducing chambers 184. In this embodiment, two first plates 182 and two second plates 183 are provided, while in other embodiments, the number of the first plates 182 and the second plates 183 can be three, four, five, etc.

[0060] Reference Figure 3 and Figure 4 , the first plate 182 is slidably connected to the valve stem 15, and the first plate 182 is provided with a first through hole 1821 for high-pressure hydrogen to pass through. In this embodiment, the number of the first through holes 1821 is an even number, and the first through holes 1821 are arranged in pairs on both sides of the valve stem 15. The virtual connection line of the first through holes 1821 arranged in pairs is the first virtual connection line 1822, and the high-pressure hydrogen flows out from the two first through holes 1821 respectively. In this embodiment, there are two first through holes 1821; in other embodiments, the number of the first through holes 1821 can be four, six, etc.

[0061] Reference Figure 5 In this embodiment, the sleeve 181 is provided with a first stepped hole 1811 for the bolt to pass through, and the first plate 182 is provided with a first threaded hole matched with the bolt; so that the sleeve 181 and the first plate 182 are fixedly connected by bolts.

[0062] Reference Figure 3 and Figure 4, the second plate 183 is fixedly connected to the valve stem 15, and the second plate 183 is slidably connected to the inner circumferential wall of the sleeve 181. The second plate 183 is provided with a second penetration hole 1831 for the high-pressure hydrogen to pass through, and the first penetration hole 1821 and the second penetration hole 1831 are arranged alternately. The number of the second penetration holes 1831 is an even number, and a plurality of second penetration holes 1831 are symmetrically arranged in pairs on both sides of the valve stem 15. The virtual connection line of the second penetration holes 1831 arranged in pairs is the second virtual connection line 1832, and the high-pressure hydrogen flows out from the two second penetration holes 1831 respectively. In this embodiment, two second penetration holes 1831 are provided; in other embodiments, the number of the second penetration holes 1831 may be four, six, etc.

[0063] Reference Figure 5 and Figure 6 The regulating valve body further includes a stopper 19, and the second plate 183 is fixedly connected to the valve stem 15 through the stopper 19. The stopper 19 includes a first stopper 191 and a second stopper 192, the first stopper 191 and the second stopper 192 are vertically arranged, and the first stopper 191 and the second stopper 192 are integrally formed; the second stopper 192 is connected to the second plate 183, and the second stopper 192 is connected to the valve stem 15.

[0064] In this embodiment, the second limit member 192 is fixedly connected to the second plate member 183 via bolts, and the second limit member 192 is fixedly connected to the valve stem 15 via bolts; thereby, the second plate member 183 is fixedly connected to the valve stem 15.

[0065] Reference Figure 4 and Figure 5 In this embodiment, the first perforation hole 1821 and the second perforation hole 1831 are arranged at an angle so that after the high-pressure hydrogen flows out from the first perforation hole 1821 or the second perforation hole 1831, a counter-effect will be produced. This embodiment is explained by taking the first perforation hole 1821 as an example. The central axes of the two first perforations 1821 on the first plate 182 are arranged to intersect, so that after the high-pressure hydrogen flows out of the two first perforations 1821, part of the high-pressure hydrogen flows along the central axis of the first perforation hole 1821, so that the two streams of high-pressure hydrogen produce a counter-effect; and part of the high-pressure hydrogen flows toward the second plate 183, so that the high-pressure hydrogen and the second plate 183 produce a counter-effect to dissipate the energy of the high-pressure hydrogen.

[0066] According to the different driving energy sources of the actuator 2, the regulating valve can be divided into pneumatic regulation, electric regulation and hydraulic regulation; in this embodiment, the actuator 2 of the regulating valve adopts electric regulation. The actuator 2 is the driving mechanism of the regulating mechanism 1, which makes the valve stem 15 and the valve core 14 produce corresponding displacements; and the movement of the valve core 14 will change the throttling area of ​​the regulating valve to achieve the purpose of regulating the high-pressure hydrogen delivery.

[0067] In the prior art, there are many ways to implement the actuator 2, and the execution structure is not the main invention point of this application; this application does not limit the specific structure of the actuator 2, nor does it elaborate on the specific working principle of the actuator 2.

[0068] The implementation principle of a high-pressure hydrogen regulating valve in the embodiment of the present application is:

[0069] The working process of the control valve is divided into two stages:

[0070] Reference Figure 3 and Figure 5 , the first stage: regulating the valve opening, the valve core 14 begins to separate from the valve seat 13. Before regulating the valve opening, there is a high pressure difference between the upstream delivery pipeline and the downstream delivery pipeline of the regulating valve; thus, after the opening is adjusted, there is a high pressure difference before and after the valve port of the regulating valve.

[0071] Reference Figure 3 and Figure 5 When the actuator 2 drives the valve stem 15 away from the valve seat 13, the valve core 14 is separated from the valve seat 13; after the valve core 14 and the valve seat 13 are separated from each other, the high-pressure hydrogen flows along the axis direction of the valve core 14 and the valve stem 15. As the hydrogen gradually flows through the pressure-reducing chamber 184 surrounded by the adjacent first plate 182 and the second plate 183.

[0072] Reference Figure 3 and Figure 5 , the first penetration holes 1821 are arranged in pairs on both sides of the valve stem 15, so that when the high-pressure hydrogen passes through two different first penetration holes 1821 of the same first plate 182; the two streams of high-pressure hydrogen produce a hedging effect, so that the two streams of high-pressure hydrogen are combined into one. Subsequently, the combined high-pressure hydrogen is divided into two streams, and the two streams of high-pressure hydrogen are respectively penetrated by the two second penetration holes 1831 on the second plate 183, and the high-pressure hydrogen continues to move, so that the two streams of high-pressure hydrogen are offset again.

[0073] That is, the high-pressure hydrogen gas is counter-charged, merged, split and counter-charged multiple times in the pressure reduction component 18, and the pressure reduction component 18 makes the high-pressure hydrogen gas buffered step by step during the flow process; the energy of the high-pressure hydrogen gas is continuously dissipated, and the pressure of the high-pressure hydrogen gas is reduced by one level due to the throttling and pressure reduction effect each time it flows through a pressure reduction chamber 184, thereby decomposing the original large pressure difference into multiple small pressure differences. The pressure reduction component 18 converts the large pressure difference of the high-pressure hydrogen gas into multiple small pressure differences, while ensuring that the regulating valve has good flow performance.

[0074] That is, the actual pressure difference before and after the regulating valve is uniformly reduced along the axis direction of the valve stem 15 and the valve core 14, that is, the high pressure difference acting on the valve port is quickly decomposed, so that there is no continuous high pressure difference at the valve port. In this way, the flow rate of high-pressure hydrogen is controlled, and the erosion and corrosion of the valve seat 13 and the valve core 14 by high-pressure hydrogen is weakened, so as to increase the service life of the regulating valve.

[0075] Reference Figure 3 and Figure 5 , Second stage: the actuator 2 continues to expand the opening of the regulating valve, that is, the distance between the valve core 14 and the valve seat 13 is further increased. As the distance between the valve core 14 and the valve seat 13 is further increased, the actual flow area of ​​the regulating valve becomes larger, and the flow rate of the high-pressure hydrogen in the regulating valve will change.

[0076] Reference Figure 3 and Figure 5 In the present technical solution, when the valve stem 15 and the valve core 14 move in a direction away from the valve seat 13, the second plate 183 will approach the first plate 182, thereby reducing the size of the pressure reduction channel in the pressure reduction component 18 and the size distribution of the plurality of pressure reduction chambers 184 in the pressure reduction channel; thereby increasing the resistance encountered by hydrogen passing through the pressure reduction component 18, causing the fluid energy of the high-pressure hydrogen to be continuously dissipated, so as to achieve the purpose of reducing the flow rate of the high-pressure hydrogen.

[0077] To sum up: when the staff gradually increases the opening of the regulating valve, the relative positions of the first plate 182 and the second plate 183 change, so that the regulating valve can dynamically change the size of the actual pressure reduction chamber 184 in the pressure reduction component 18 according to the actual opening size, so as to change the resistance encountered by the high-pressure hydrogen in the pressure reduction component 18 and the dissipated fluid energy.

[0078] Thus, a stable low pressure difference is maintained on both sides of the valve port, so as to reduce the erosion and corrosion of the valve seat 13 and the valve core 14 by the high-pressure hydrogen when the opening of the regulating valve becomes larger. That is, through the cooperation of the first plate 182 and the second plate 183, the pressure reduction and speed control capabilities of the regulating valve can be improved. Example 2

[0079] The difference between this embodiment 2 and embodiment 1 is that:

[0080] Reference Figure 7 and Figure 8, along the length direction of the valve stem 15, the limiter 19 is fixedly arranged on both sides of the second plate 183. The limiter 19 includes a first limiter 191 and a second limiter 192, the first limiter 191 and the second limiter 192 are arranged vertically, and the first limiter 191 and the second limiter 192 are integrally formed. The valve stem 15 is provided with a first limiter groove 151 for accommodating the first limiter 191, the first limiter 191 is arranged flush with the outer periphery of the valve stem 15, and the first limiter 191 and the valve stem 15 are fixedly connected by bolts. The second plate 183 is provided with a second limiter groove 1834 for accommodating the second limiter 192, the second limiter 192 is arranged flush with the surface of the second plate 183, and the second limiter 192 abuts against the second plate 183.

[0081] Along the length direction of the valve stem 15 , the second plate 183 is limited by the two limit members 19 , so that the second plate 183 is solidified on the valve stem 15 , and the second plate 183 and the valve stem 15 can rotate relative to each other.

[0082] Reference Fig. 9 and Fig.10 A plurality of rifling grooves 5 are arranged at intervals on the inner wall of the sleeve 181, and the number of the rifling grooves 5 corresponds to the number of the second plate 183. The outer periphery of the second plate 183 is provided with guide grooves 1833 matching the rifling grooves 5, and the second plate 183 spirally rotates along the rifling grooves 5; when the valve core 14 is away from the valve seat 13, the distance between the first through-holes 1821 and the second through-holes 1831 arranged in pairs decreases.

[0083] Reference Fig.11 The diameters of the first through hole 1821 and the second through hole 1831 are the same; when the valve core 14 and the valve seat 13 are fully opened, the first plate 182 and the second plate 183 abut against each other, and the first through hole 1821 and the second through hole 1831 are coaxially arranged.

[0084] The implementation principle of a high-pressure hydrogen regulating valve in the embodiment of the present application is:

[0085] Reference Fig. 9 and Fig.10 When the valve stem 15 drives the second plate 183 to move away from the valve seat 13, the second plate 183 spirally rotates upward around the valve stem 15 through the coordinated cooperation between the guide groove 1833 on the second plate 183 and the rifling 5, so that the distance between the second plate 183 and the first plate 182 becomes smaller, the angle between the first virtual connecting line 1822 and the second virtual connecting line 1832 becomes smaller, and the distance between the first through-hole 1821 and the second through-hole 1831 arranged in pairs decreases.

[0086] In the first and second stages of the operation of the regulating valve, the opening of the regulating valve is small, so that the high-pressure hydrogen is slowly filled into the downstream delivery pipeline. In these two stages, the blocking of the high-pressure hydrogen by the first plate 182 and the second plate 183 of the regulating valve, and the hedging energy consumption of the high-pressure hydrogen in the regulating valve are dominant; that is, the pressure reduction performance of the regulating valve is dominant, and the flow performance of the regulating valve is secondary.

[0087] When the regulating valve is opened for a period of time and the amount of high-pressure hydrogen filling the downstream delivery pipeline is large, the actual pressure difference between the upstream delivery pipeline and the downstream delivery pipeline becomes smaller, so that the scouring and corrosion of the valve seat 13 and the valve by the high-pressure hydrogen also becomes weaker.

[0088] Subsequently, the regulating valve enters the third stage of operation. In the third stage of the regulating valve, the high-pressure hydrogen has lower pressure reduction requirements on the regulating valve, while higher requirements on the flow performance of the regulating valve to ensure the delivery volume of the high-pressure hydrogen.

[0089] Reference Fig.11 When the filling level of high-pressure hydrogen in the downstream transmission pipeline is high, the staff can increase the opening of the regulating valve until the regulating valve is fully opened; that is, the regulating valve is opened as wide as possible to increase the flow rate of high-pressure hydrogen.

[0090] Reference Fig.11 , and in the context of a large opening of the regulating valve, the upward movement distance and rotation angle of the second plate 183 are both large; this makes the distance between the first perforated hole 1821 and the second perforated hole 1831 smaller, until the first perforated hole 1821 and the second perforated hole 1831 are coaxially arranged. In this process, the resistance to the flow of high-pressure hydrogen in the depressurization component 18 becomes smaller, and the fluid energy dissipated by the high-pressure hydrogen in the depressurization component 18 is lower, so that the high-pressure hydrogen flows through the depressurization component 18 to the downstream delivery pipeline to ensure the flow rate of the high-pressure hydrogen. That is, through the coordinated cooperation of the second plate 183 and the rifling 5, the pressure reduction and speed control capabilities of the regulating valve can be improved.

[0091] To sum up: in the early small opening stage of the regulating valve, the present application uses the multi-stage pressure reduction control of the pressure reducing component 18 to convert a large pressure drop into a multi-stage small pressure drop, and the high pressure difference acting on the valve port is quickly decomposed, so that there is no continuous high pressure difference at the valve port; so as to control the flow rate of high-pressure hydrogen, weaken the scouring and corrosion of the valve seat 13 and the valve core 14 by high-pressure hydrogen, and improve the service life of the regulating valve.

[0092] In the later large opening stage of the regulating valve, the distance between the first perforation hole 1821 and the second perforation hole 1831 becomes smaller until the first perforation hole 1821 and the second perforation hole 1831 are coaxially arranged, thereby reducing the pressure reducing performance of the pressure reducing component 18 and improving the flow performance of the pressure reducing component 18, thereby enhancing the flow performance of the pressure reducing component 18.

[0093] In other words, in the early small opening stage of the regulating valve, the pressure reduction performance of the regulating valve is dominant, while in the later large opening stage of the regulating valve, the flow performance of the regulating valve is dominant; that is, the regulating valve structure of the present application has the advantages of multi-stage pressure reduction regulation of small opening and high flow of large opening. Example 3

[0094] The difference between this embodiment 3 and embodiment 2 is that:

[0095] Reference Fig.12 The connecting hole 131 of the valve seat 13 is a stepped hole. In the vertical downward direction, the connecting hole 131 is divided into a first connecting hole 1311 and a second connecting hole 1312. The diameter of the first connecting hole 1311 is smaller than the diameter of the second connecting hole 1312. The valve core 14 is used to block the first connecting hole 1311. An annular groove 141 is provided on the outer periphery of the valve stem 15. The annular groove 141 is provided on the side of the valve stem 15 close to the valve core 14.

[0096] The implementation principle of a high-pressure hydrogen regulating valve in the embodiment of the present application is:

[0097] Reference Fig.12 When the valve core 14 is separated from the valve seat 13, the high-pressure hydrogen will flow through the second connecting hole 1312 and the first connecting hole 1311 in sequence, and the high-pressure hydrogen will mainly impact the side wall and bottom wall of the second connecting hole 1312, that is, the impact position of the high-pressure hydrogen on the valve seat 13 is shifted from the side wall of the hole abutting the valve core 14 to the side wall and bottom wall of the second connecting hole 1312 that are not abutting the valve core 14.

[0098] That is, by setting the connecting hole 131 as the first connecting hole 1311 and the second connecting hole 1312, not only the pressure reduction effect is achieved, but also the erosion and wear of the important position of the valve seat 13 by the high-pressure hydrogen can be reduced, the sealing between the valve core 14 and the valve seat 13 is improved, and the service life of the regulating valve is increased.

[0099] By providing an annular groove 141 on the side of the valve stem 15 close to the valve core 14, when the hydrogen flows through the valve core 14 and the valve stem 15, the annular groove 141 has the effect of retaining and disturbing the hydrogen, so that part of the hydrogen and the newly entered hydrogen have an offset effect; thereby, along the flow direction of the hydrogen, the pressure difference on both sides of the valve core 14 can be reduced to reduce the scouring and corrosion of the valve core 14 by the hydrogen. Example 4

[0100] The difference between this embodiment 4 and embodiment 1 is that:

[0101] Reference Fig.13 A spiral blade 3 is provided on the outer periphery of the valve stem 15 , and the spiral blade 3 is arranged between the second plate 183 and the valve core 14 , and an avoidance gap is provided between the spiral blade 3 and the second plate 183 and the valve core 14 .

[0102] The implementation principle of a high-pressure hydrogen regulating valve in the embodiment of the present application is:

[0103] Reference Fig.13 When high-pressure hydrogen acts on the valve stem 15, these external loads and their coupling effects will cause vortex-induced vibration of the valve stem 15, thereby reducing the fatigue life of the valve stem 15. By arranging a spiral blade 3 on the periphery of the valve stem 15, the spiral blade 3 is used to guide the flow of hydrogen to reduce the effect of hydrogen on the valve stem 15, alleviate the vortex-induced vibration of the valve stem 15 and the valve core 14, and improve the service life of the valve stem 15 and the valve core 14.

[0104] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A regulating valve for high-pressure hydrogen, characterized in that: The invention comprises a regulating mechanism (1) and an actuator (2), wherein the regulating mechanism (1) is used to communicate with a delivery pipeline, and the actuator (2) is used to control the operation of the regulating mechanism (1); the regulating mechanism (1) comprises a regulating valve body and a pressure reducing assembly (18), wherein a receiving chamber (111) is provided inside the regulating valve body, and the pressure reducing assembly (18) is fixedly arranged in the receiving chamber (111) of the regulating valve body, and the pressure reducing assembly (18) is arranged on the flow path of high-pressure hydrogen, and the pressure reducing assembly (18) is provided with a pressure reducing flow channel for the high-pressure hydrogen to flow; the pressure reducing assembly (18) comprises a sleeve ( 181), a first plate (182) and a second plate (183); the sleeve (181) is fixedly connected to the regulating valve body, and a plurality of the first plate (182) and the second plate (183) are provided. Along the flow direction of the high-pressure hydrogen, a plurality of the second plate (183) and the first plate (182) are alternately arranged on the inner circumferential wall of the sleeve (181), and the first plate (182) and the second plate (183) divide the pressure reducing flow channel into a plurality of pressure reducing chambers (184). The first plate (182) is provided with a first penetration hole (1821) for the high-pressure hydrogen to penetrate. ), the second plate (183) is provided with a second penetration hole (1831) for the high-pressure hydrogen to penetrate, and the first penetration hole (1821) and the second penetration hole (1831) are arranged alternately; the second plate (183) is slidably connected to the inner peripheral wall of the sleeve (181), and the first plate (182) is fixedly connected to the sleeve (181); the actuator (2) drives the second plate (183) to slide, and the space of the pressure-reducing flow channel decreases as the opening of the regulating valve body increases; the regulating valve body comprises a valve body (11), a valve cover (12), a valve seat (13), and a valve core (14). , a valve stem (15), a sealing member (16), a push rod (17) and a pressure reducing assembly (18); the valve body (11) and the valve cover (12) are covered and fixed together, a mounting seat (112) is provided inside the valve body (11), the mounting seat (112) divides the accommodating chamber (111) into a first accommodating chamber (1111) and a second accommodating chamber (1112), the mounting seat (112) is provided with a mounting hole for mounting the valve seat (13); the valve seat (13) is provided with a connecting hole (131) for connecting the first accommodating chamber (1111) and the second accommodating chamber (1112);The valve stem (15) is inserted into the valve cover (12), and the sealing member (16) is arranged between the valve cover (12) and the valve stem (15). The main body of the valve core (14) is arranged in the second accommodating chamber (1112); the valve core (14) and the push rod (17) are respectively fixedly arranged at two ends of the valve stem (15); the valve core (14) is used to abut against the valve seat (13); the valve core (14) is used to block the connecting hole (131); the push rod (17) is used to be fixedly connected to the actuator (2); the actuator (2) is used to drive the valve core (14) to approach or move away from the valve seat (13); the pressure reducing assembly (18) is fixedly arranged in the second accommodating chamber (1112); the pressure reducing assembly (18) is sleeved on the outer periphery of the valve stem (15); the first plate (182) is slidably connected to the valve stem (15); the second plate (183) is fixedly connected to the valve stem (15); the pressure reducing assembly (18) also includes The valve stem (15) includes a stopper (19), the stopper (19) being fixedly connected to the valve stem (15), and being fixedly arranged on both sides of the second plate (183) along the length direction of the valve stem (15), the second plate (183) being rotatably abutted against the valve stem (15) and the stopper (19); a plurality of rifling grooves (5) are arranged at intervals on the inner peripheral wall of the sleeve (181), the number of the rifling grooves (5) corresponding to the number of the second plate (183); a guide groove (1833) matching the rifling grooves (5) is arranged on the outer periphery of the second plate (183), and the second plate (183) is spirally rotated along the rifling grooves (5); when the valve core (14) is away from the valve seat (13), the distance between adjacent first through-holes (1821) and second through-holes (1831) decreases. ; 2. The high pressure hydrogen regulating valve according to claim 1, characterized in that: The first through hole (1821) and the second through hole (1831) have the same diameter; when the valve core (14) and the valve seat (13) are fully opened, the first plate member (182) and the second plate member (183) abut against each other, and the first through hole (1821) and the second through hole (1831) are coaxially arranged.

3. The high pressure hydrogen regulating valve according to claim 1, characterized in that: The number of the first penetration holes (1821) is an even number, and a plurality of the first penetration holes (1821) are symmetrically arranged in pairs on both sides of the valve stem (15). A virtual connection line of the first penetration holes (1821) arranged in pairs is a first virtual connection line (1822), and high-pressure hydrogen flows out from two first penetration holes (1821) respectively and then counteracts each other.

4. The high pressure hydrogen regulating valve according to claim 3, characterized in that: The number of the second penetration holes (1831) is an even number, and a plurality of the second penetration holes (1831) are symmetrically arranged in pairs on both sides of the valve stem (15), and a virtual connection line of the second penetration holes (1831) arranged in pairs is a second virtual connection line (1832), and high-pressure hydrogen flows out from two second penetration holes (1831) and then impacts each other; when the valve core (14) moves away from the valve seat (13), the angle between adjacent first virtual connection lines (1822) and second virtual connection lines (1832) decreases.

5. The high pressure hydrogen regulating valve according to claim 1, characterized in that: The limiting member (19) comprises a first limiting member (191) and a second limiting member (192), the first limiting member (191) and the second limiting member (192) being arranged perpendicularly to each other, and the first limiting member (191) and the second limiting member (192) being integrally formed; a first limiting groove (151) for accommodating the first limiting member (191) is provided on the valve stem (15), the first limiting member (191) is arranged flush with the outer periphery of the valve stem (15), and the first limiting member (191) and the valve stem (15) are fixedly connected by bolts; a second limiting groove (1834) for accommodating the second limiting member (192) is provided on the second plate member (183), the second limiting member (192) and the surface of the second plate member (183) are arranged flush, and the second limiting member (192) and the second plate member (183) are rotatably abutted against each other.

6. The high pressure hydrogen regulating valve according to claim 1, characterized in that: The connecting hole (131) of the valve seat (13) is a stepped hole. In the vertical downward direction, the connecting hole (131) is divided into a first connecting hole (1311) and a second connecting hole (1312). The diameter of the first connecting hole (1311) is smaller than the diameter of the second connecting hole (1312). The valve core (14) is used to block the first connecting hole (1311).

7. The high pressure hydrogen regulating valve according to claim 1, characterized in that: An annular groove (141) is provided on the outer periphery of the valve stem (15), and the annular groove (141) is arranged on a side of the valve stem (15) close to the valve core (14).

8. The high-pressure hydrogen regulating valve according to claim 1, characterized in that: A spiral blade (3) is provided on the outer periphery of the valve stem (15); the spiral blade (3) is arranged between the pressure reducing component (18) and the valve core (14); and an escape gap is provided between the spiral blade (3) and the pressure reducing component (18) and the valve core (14).

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