Novel hydrogen regulating valve

Abstract

The utility model relates to the technical field of regulators, in particular to a novel hydrogen regulating valve, which is characterized in that a main valve comprises a valve body, and a valve rod, a valve core and a valve seat which are arranged in the valve body, and the valve core is connected with an actuator through the valve rod; a channel is formed in the valve body in a penetrating mode along the horizontal axis, an inlet and an outlet of the valve body are formed in the two ends of the channel, a mounting cavity and a runner are formed in the channel in the axial direction, and the two ends of the mounting cavity and the runner communicate with the inlet and the outlet of the valve body correspondingly. The valve element is arranged in the mounting cavity and is driven by the valve rod to abut against the valve seat, so that the outlet of the runner is blocked. The valve body conveys hydrogen through the flow channel, the valve element and the flow channel are arranged in the channel in a separated mode, the hydrogen only flows through the flow channel and is prevented from making contact with the valve element in the guide sleeve, the risk that high-pressure hydrogen permeates a valve element material is reduced, and the risk that the valve element is corroded is reduced. The main valve adopts an integrated valve body design, and compared with a traditional three-section split valve body, the assembly error accumulation is reduced, the clamping stagnation fault probability is reduced, meanwhile, the sealing structure is simplified, and the reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of regulator technology, and in particular to a novel hydrogen regulating valve. Background Technology

[0002] As the global energy structure shifts towards a low-carbon model, the importance of hydrogen as a clean energy carrier is becoming increasingly prominent. Currently, developed countries in Europe and America have established large-scale pure hydrogen transmission pipeline networks; my country's pure hydrogen pipeline construction is in a rapid development stage, with the total length of existing and planned pipelines exceeding 1800 kilometers. Due to the small molecular weight of hydrogen and its strong permeability, higher requirements are placed on the sealing performance, material corrosion resistance, and structural reliability of pressure regulators in high-pressure hydrogen-blended pipelines.

[0003] Currently, the main structure of axial flow electric hydrogen regulating valves consists of an actuator and a main valve. The electric actuator controls the position of the valve core within the main valve to regulate process parameters such as medium flow and pressure. The main valve generally adopts a traditional three-section split valve body structure, which has a large number of assembled parts. Accumulated assembly errors can easily lead to jamming failures. Furthermore, the multi-stage sealing surfaces are prone to accelerated aging due to hydrogen permeation, especially under high pressure differential and sulfur-containing corrosive conditions, where the seals are prone to failure, posing safety hazards.

[0004] Under high pressure differential conditions, the valve core is significantly affected by fluid dynamic forces. The unbalanced force causes load fluctuations in the actuator, resulting in a decrease in regulation accuracy. Furthermore, the valve stem material has weak resistance to hydrogen embrittlement and is prone to valve stem vibration under high-speed hydrogen impact, which not only affects the smoothness of transmission but also easily leads to fatigue cracks during long-term operation.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a novel hydrogen regulating valve that addresses the deficiencies in existing technologies.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A novel hydrogen regulating valve includes a main valve and an actuator. The main valve includes a valve body and a valve stem, a valve core, and a valve seat disposed therein. The valve seat is disposed at the outlet of the valve body corresponding to the valve core. The valve core is connected to the actuator through the valve stem.

[0009] The valve body has a channel extending through it along a horizontal axis, and an inlet and an outlet are formed at both ends of the channel. An installation cavity and a flow channel are respectively provided along the axial direction of the channel, and the two ends of the installation cavity and the flow channel are respectively connected to the inlet and outlet of the valve body.

[0010] The valve core is disposed in the mounting cavity and is driven by the valve stem to move closer to or away from the valve seat. The valve core cooperates with the valve seat to block the outlet of the flow channel.

[0011] Furthermore, a guide sleeve is provided inside the mounting cavity, the guide sleeve engages with the inner wall of the mounting cavity, and a first sealing ring and a second sealing ring are respectively fitted at both ends of the guide sleeve. The valve core is disposed inside the guide sleeve and slidably connected to it.

[0012] Furthermore, the valve core includes a sliding sleeve and a guide rod disposed therein, the sliding sleeve being slidably connected to the guide sleeve, the guide rod being disposed along the axis of the sliding sleeve and connected to the valve stem;

[0013] One end of the sliding sleeve is open, and a limit block is provided at its open end. One end of the guide rod abuts against the inner wall of the end face of the sliding sleeve, and the other end abuts against the limit block.

[0014] Furthermore, a groove is provided at the center of the inner wall of the sliding sleeve end face, and one end of the guide rod engages with the groove;

[0015] An internal thread is provided at the open end of the sliding sleeve, and the limiting block is screwed to the internal thread of the sliding sleeve through an external thread provided on its outer ring.

[0016] Furthermore, one end of the guide sleeve is open and extends to the outlet of the flow channel. A silencer cage is provided in the channel at the outlet of the flow channel, and several throttling holes are provided on the silencer cage.

[0017] One end of the silencer valve cage abuts against the open end of the guide sleeve, and a pressure ring is provided at the end of the silencer valve cage away from the guide sleeve. The side of the pressure ring away from the silencer valve cage abuts against the valve seat.

[0018] Furthermore, the inner diameter of the guide sleeve is the same as the inner diameter of the silencer valve cage and the inner diameter of the pressure ring, and the inner ring size of the valve seat is smaller than the outer ring size of the sliding sleeve;

[0019] An inclined surface is provided on the side of the valve seat facing the silencer valve cage, and a triangular sealing ring is provided on the inclined surface corresponding to the sliding sleeve.

[0020] Furthermore, a flange sleeve is provided at the outlet end of the channel, the flange sleeve is screwed to the channel and abuts against the valve seat, and a fifth sealing ring is provided on the outer ring of the valve seat.

[0021] Furthermore, the valve stem and the guide rod are provided with intermeshing 45° helical teeth. The valve stem is radially inserted through the guide sleeve and moves along its length under the drive of the actuator. The sliding sleeve sidewall is symmetrically provided with sliding grooves along its axial direction, and the valve stem is slidably connected to the sliding grooves.

[0022] A third sealing ring and a fourth sealing ring are provided between the sliding sleeve and the guide sleeve, and the sliding groove is located between the third sealing ring and the fourth sealing ring.

[0023] Furthermore, the actuator is connected to the valve body via a connecting flange, which presses the end cap onto the top of the valve body, and the valve stem passes through the end cap and is slidably connected to it.

[0024] Furthermore, the actuator includes a support base and a motor and a trapezoidal screw disposed thereon, the trapezoidal screw being connected to the valve stem and driven by the motor to move along the length direction of the valve stem;

[0025] An opening indicator is provided on the support base, and a slider pointer is provided on the trapezoidal screw. The slider pointer is slidably connected to the support base through a deep groove ball bearing.

[0026] The beneficial effects of this utility model are as follows:

[0027] In this application, the valve body houses the guide sleeve and valve core through its internal mounting cavity, and hydrogen is transported through a flow channel. The mounting cavity and the flow channel are separated within the channel, resulting in a separate design for the axial flow channel and the valve core. The valve core moves axially within the mounting cavity driven by the valve stem, and blocks the flow channel outlet when it abuts against the valve seat. Hydrogen flows only through the flow channel, avoiding contact with the valve core inside the guide sleeve, reducing the risk of high-pressure hydrogen permeation into the valve core material, and lowering the risk of valve core corrosion. The main valve adopts an integrated valve body design, which, compared to the traditional three-section split valve body, reduces the accumulation of assembly errors, lowers the probability of jamming failure, simplifies the sealing structure, and improves reliability. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the novel hydrogen regulating valve in this utility model;

[0030] Figure 2 This is a schematic diagram of the main valve in this utility model;

[0031] Figure 3 This is a schematic diagram of the actuator in this utility model.

[0032] Reference numerals: 11. Main valve; 12. Actuator; 121. Support base; 122. Motor; 123. Trapezoidal screw; 124. Opening indicator; 125. Slider pointer; 126. Deep groove ball bearing; 13. Connecting flange; 2. Valve body; 21. Channel; 22. Mounting cavity; 23. Flow channel; 24. End cover; 3. Valve stem; 4. Valve core; 41. Sliding sleeve; 411. Slot; 412. Slide groove; 42. Guide rod; 43. Limiting block; 51. Valve seat; 511. Inclined surface; 512. Triangular sealing ring; 513. Fifth sealing ring; 52. Guide sleeve; 521. First sealing ring; 522. Second sealing ring; 523. Third sealing ring; 524. Fourth sealing ring; 53. Silencer valve cage; 54. Pressure ring; 55. Flange sleeve. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] As a green and low-carbon energy carrier, hydrogen energy requires its transmission and distribution system to meet stringent requirements such as high pressure, high sealing performance, and corrosion resistance. This application discloses a novel axial-flow electric hydrogen regulating valve suitable for high-pressure hydrogen-blending pipelines, which is particularly suitable for long-distance hydrogen transmission pipelines, gas storage facilities, and natural gas wellhead pressure reduction stations.

[0037] To address the technical problems of insufficient sealing performance, complex structure, and high operating resistance of traditional control valves, this application discloses a novel hydrogen control valve comprising a main valve 11 and an actuator 12, such as... Figures 1 to 3 As shown, the main valve 11 includes a valve body 2 and a valve stem 3, a valve core 4, and a valve seat 51 disposed therein. The valve seat 51 is disposed at the outlet of the valve body 2 corresponding to the valve core 4. The valve core 4 is connected to the actuator 12 through the valve stem 3. The valve body 2 has a channel 21 extending through it along the horizontal axis, forming an inlet and an outlet at both ends of the channel 2. An installation cavity 22 and a flow channel 23 are respectively disposed along the axial direction of the channel 21. The two ends of the installation cavity 22 and the flow channel 23 are respectively connected to the inlet and outlet of the valve body 2. The valve core 4 is disposed in the installation cavity 22 and is driven by the valve stem 3 to move closer to or away from the valve seat 51. The valve core 4 cooperates with the valve seat 51 to block the outlet of the flow channel 23.

[0038] In this embodiment, the valve body 2 accommodates the guide sleeve 52 and the valve core 4 through its internal mounting cavity 22, and supplies hydrogen through the flow channel 23. The mounting cavity 22 and the flow channel 23 are separated within the channel 21, allowing the axial flow channel 23 to be designed separately from the valve core 4. The valve core 4 is driven axially by the valve stem 3 within the mounting cavity 22, and when it abuts against the valve seat 51, it blocks the outlet of the flow channel 23. Hydrogen flows only through the flow channel 23, avoiding contact with the valve core 4 and the interior of the guide sleeve 52, reducing the risk of high-pressure hydrogen permeation into the valve core 4 material, and lowering the risk of corrosion of the valve core 4. The main valve 11 adopts an integrated valve body 2 design, which, compared with the traditional three-section split valve body 2, reduces the accumulation of assembly errors, lowers the probability of jamming failure, simplifies the sealing structure, and improves reliability.

[0039] Furthermore, a guide sleeve 52 is provided inside the mounting cavity 22. The guide sleeve 52 engages with the inner wall of the mounting cavity 22. A first sealing ring 521 and a second sealing ring 522 are respectively fitted at both ends of the guide sleeve 52. The valve core 4 is disposed inside the guide sleeve 52 and slidably connected to it.

[0040] The guide sleeve 52 is fitted on the outer ring of the valve core 4. The guide sleeve 52 restricts the radial displacement of the valve core 4, reduces the vibration of the valve stem 3, and avoids fatigue cracks. The valve core 4, in conjunction with the guide sleeve 52, can significantly enhance the movement stability of the valve core 4 and improve the sealing performance under high pressure differential conditions.

[0041] The first and second sealing rings 522 are made of hydrogen embrittlement resistant materials, such as fluororubber or graphite composite packing, forming multiple static sealing barriers between the inner wall of the mounting cavity 22 and the guide sleeve 52 to prevent hydrogen from leaking out through the mounting cavity 22. The valve body 2 is made of CF3M stainless steel, which has both high strength and hydrogen embrittlement resistance; the valve core 4, guide sleeve 52, etc. are made of F316 III stainless steel, which has high pressure corrosion resistance.

[0042] Furthermore, the valve core 4 includes a sliding sleeve 41 and a guide rod 42 disposed therein. The sliding sleeve 41 is slidably connected to the guide sleeve 52. The guide rod 42 is disposed along the axis of the sliding sleeve 41 and is connected to the valve stem 3. One end of the sliding sleeve 41 is open and a limit block 43 is provided at its open end. One end of the guide rod 42 abuts against the inner wall of the end face of the sliding sleeve 41, and the other end abuts against the limit block 43.

[0043] A groove 411 is provided at the center of the inner wall of the end face of the sliding sleeve 41, and one end of the guide rod 42 is engaged with the groove 411; an internal thread is provided at the open end of the sliding sleeve 41, and the limiting block 43 is screwed to the internal thread of the sliding sleeve 41 through the external thread provided on its outer ring.

[0044] Specifically, the valve core 4 consists of a sliding sleeve 41, a guide rod 42, and a limiting block 43. The guide rod 42 is pressed into the sliding sleeve 41 by a groove 411 and a threaded limiting block 43. During the assembly of the valve core 4, the guide rod 42 is inserted from the open end of the sliding sleeve 41. One end of the guide rod 42 is fixed to the inner wall of the sliding sleeve 41 by the groove 411, and the other end is pressed by the limiting block 43 by threads, ensuring a rigid connection between the guide rod 42 and the sliding sleeve 41 and simplifying the installation process of the guide rod 42. The sliding sleeve 41 and the guide rod 42 are made of N07718 nickel-based alloy, which meets the NACE MR0103 standard, and has both high hardness and resistance to hydrogen embrittlement, improving the erosion resistance and transmission smoothness of the valve core 4 assembly and adapting to sulfur-containing corrosive conditions.

[0045] Furthermore, one end of the guide sleeve 52 is open and extends to the outlet of the flow channel 23. A silencer cage 53 is provided in the channel 21 at the outlet of the flow channel 23. Several throttling holes are provided on the silencer cage 53. One end of the silencer cage 53 abuts against the open end of the guide sleeve 52. A pressure ring 54 is provided at the end of the silencer cage 53 away from the guide sleeve 52. The side of the pressure ring 54 away from the silencer cage 53 abuts against the valve seat 51.

[0046] The inner diameter of the guide sleeve 52 is the same as the inner diameter of the silencer valve cage 53 and the inner diameter of the pressure ring 54. The inner ring size of the valve seat 51 is smaller than the outer ring size of the sliding sleeve 41. An inclined surface 511 is provided on the side of the valve seat 51 facing the silencer valve cage 53, and a triangular sealing ring 512 is provided on the inclined surface 511 corresponding to the sliding sleeve 41. A flange sleeve 55 is provided at the outlet end of the channel 21. The flange sleeve 55 is screwed to the channel 21 and abuts against the valve seat 51. A fifth sealing ring 513 is provided on the outer ring of the valve seat 51.

[0047] The throttling orifices evenly distributed around the periphery of the silencer valve cage 53 disperse fluid kinetic energy and reduce noise. When the sliding sleeve 41 moves to the closed position, its outer wall fits tightly against the triangular sealing ring 512, achieving zero leakage. The triangular sealing ring 512 can adopt a metal-graphite composite structure, which self-tightens under pressure when the valve core 4 is closed, compensating for wear allowance and ensuring zero leakage. The outlet end of the channel 21 is screwed to the flange sleeve 55, which sequentially presses the guide sleeve 52, silencer valve cage 53, pressure ring 54, and valve seat 51, enhancing the planar sealing performance between the pressing end faces of each component.

[0048] The guide sleeve 52, the silencer cage 53, and the pressure ring 54 have the same inner diameter, which allows the sliding sleeve 41 of the valve core 4 to slide along the inner walls of the guide sleeve 52, the silencer cage 53, and the pressure ring 54. When one end of the sliding sleeve 41 abuts against the triangular sealing ring 512 on the valve seat 51, the outer wall of the sliding sleeve 41 blocks the throttling hole on the silencer cage 53 and closes the outlet end of the flow channel 23.

[0049] Furthermore, 45° helical teeth that mesh with each other are provided on the valve stem 3 and the guide rod 42. The valve stem 3 is radially inserted through the guide sleeve 52 and moves along its length under the drive of the actuator 12. A sliding groove 412 is symmetrically opened on the side wall of the sliding sleeve 41 along its axial direction, and the valve stem 3 is slidably connected to the sliding groove 412. A third sealing ring 523 and a fourth sealing ring 524 are provided between the sliding sleeve 41 and the guide sleeve 52, and the sliding groove 412 is located between the third sealing ring 523 and the fourth sealing ring 524.

[0050] The helical gear transmission converts the vertical movement of the valve stem 3 into the horizontal displacement of the guide rod 42, which in turn drives the sliding sleeve 41 to move, realizing the horizontal movement of the valve core 4 within the guide sleeve 52. The helical gear transmission can reduce the force fluctuation of the valve stem 3 and reduce the impact of unbalanced forces on the adjustment accuracy. The slide groove 412 is located between the third and fourth sealing rings 524 to prevent hydrogen from penetrating into the interior of the sliding sleeve 41, ensuring the sealing reliability of the valve core 4 during long-term operation.

[0051] Furthermore, such as Figure 3 As shown, the actuator 12 is connected to the valve body 2 via a connecting flange 13. The connecting flange 13 presses the end cap 24 onto the top of the valve body 2. The valve stem 3 passes through the end cap 24 and is slidably connected to it. The actuator 12 includes a support base 121 and a motor 122 and a trapezoidal screw 123 mounted thereon. The trapezoidal screw 123 is connected to the valve stem 3 and is driven by the motor 122 to move along the length of the valve stem 3. An opening indicator 124 is provided on the support base 121, and a slider pointer 125 is provided on the trapezoidal screw 123. The slider pointer 125 is slidably connected to the support base 121 via a deep groove ball bearing 126.

[0052] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel hydrogen regulating valve, comprising a main valve and an actuator, characterized in that, The main valve includes a valve body and a valve stem, a valve core, and a valve seat disposed therein. The valve seat is disposed at the outlet of the valve body corresponding to the valve core. The valve core is connected to the actuator through the valve stem. The valve body has a channel extending through it along a horizontal axis, and an inlet and an outlet are formed at both ends of the channel. An installation cavity and a flow channel are respectively provided along the axial direction of the channel, and the two ends of the installation cavity and the flow channel are respectively connected to the inlet and outlet of the valve body. The valve core is disposed in the mounting cavity and is driven by the valve stem to move closer to or away from the valve seat. The valve core cooperates with the valve seat to block the outlet of the flow channel.

2. The novel hydrogen regulating valve according to claim 1, characterized in that, A guide sleeve is provided inside the mounting cavity, and the guide sleeve engages with the inner wall of the mounting cavity. A first sealing ring and a second sealing ring are respectively fitted at both ends of the guide sleeve. The valve core is disposed inside the guide sleeve and slidably connected to it.

3. The novel hydrogen regulating valve according to claim 2, characterized in that, The valve core includes a sliding sleeve and a guide rod disposed therein. The sliding sleeve is slidably connected to the guide sleeve, and the guide rod is disposed along the axis of the sliding sleeve and connected to the valve stem. One end of the sliding sleeve is open, and a limit block is provided at its open end. One end of the guide rod abuts against the inner wall of the end face of the sliding sleeve, and the other end abuts against the limit block.

4. The novel hydrogen regulating valve according to claim 3, characterized in that, A groove is provided at the center of the inner wall of the end face of the sliding sleeve, and one end of the guide rod engages with the groove; An internal thread is provided at the open end of the sliding sleeve, and the limiting block is screwed to the internal thread of the sliding sleeve through an external thread provided on its outer ring.

5. The novel hydrogen regulating valve according to claim 3, characterized in that, One end of the guide sleeve is open and extends to the outlet of the flow channel. A silencer cage is provided in the channel at the outlet of the flow channel, and several throttling holes are provided on the silencer cage. One end of the silencer valve cage abuts against the open end of the guide sleeve, and a pressure ring is provided at the end of the silencer valve cage away from the guide sleeve. The side of the pressure ring away from the silencer valve cage abuts against the valve seat.

6. The novel hydrogen regulating valve according to claim 5, characterized in that, The inner diameter of the guide sleeve is the same as the inner diameter of the silencer valve cage and the inner diameter of the pressure ring, and the inner diameter of the valve seat is smaller than the outer diameter of the sliding sleeve. An inclined surface is provided on the side of the valve seat facing the silencer valve cage, and a triangular sealing ring is provided on the inclined surface corresponding to the sliding sleeve.

7. The novel hydrogen regulating valve according to claim 5, characterized in that, A flange sleeve is provided at the outlet end of the channel. The flange sleeve is screwed to the channel and abuts against the valve seat. A fifth sealing ring is provided on the outer ring of the valve seat.

8. The novel hydrogen regulating valve according to claim 3, characterized in that, The valve stem and the guide rod are provided with intermeshing 45° helical teeth. The valve stem is radially inserted through the guide sleeve and moves along its length under the drive of the actuator. The sliding sleeve sidewall is symmetrically provided with sliding grooves along its axial direction, and the valve stem is slidably connected to the sliding grooves. A third sealing ring and a fourth sealing ring are provided between the sliding sleeve and the guide sleeve, and the sliding groove is located between the third sealing ring and the fourth sealing ring.

9. The novel hydrogen regulating valve according to claim 1, characterized in that, The actuator is connected to the valve body via a connecting flange, which presses the end cap onto the top of the valve body. The valve stem passes through the end cap and is slidably connected to it.

10. The novel hydrogen regulating valve according to claim 1, characterized in that, The actuator includes a support base and a motor and a trapezoidal screw mounted thereon. The trapezoidal screw is connected to the valve stem and is driven by the motor to move along the length of the valve stem. An opening indicator is provided on the support base, and a slider pointer is provided on the trapezoidal screw. The slider pointer is slidably connected to the support base through a deep groove ball bearing.

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