Novel hydrogen pressure regulator

Abstract

The utility model relates to the technical field of axial flow type pressure regulators, in particular to a novel hydrogen pressure regulator which comprises a valve body, a valve cylinder, a valve seat and a leather membrane assembly, the valve cylinder, the valve seat and the leather membrane assembly are arranged in the valve body, the leather membrane assembly is arranged on the valve cylinder in a sleeved mode and connected with the valve body, the valve seat is arranged close to a gas outlet of the valve body, and the valve cylinder corresponds to the valve seat and is connected with the valve body in a sliding mode. A valve port pad on the valve seat is fixed through a conical gland, air outlet holes are formed in the valve seat and located on the outer ring of the valve port pad, the conical gland can guide airflow to diffuse towards the air outlet holes in the outer ring of the valve seat, the local flow speed is reduced, and the anti-scouring performance of the valve port pad is improved. The valve seat abuts against the outer ring of the outlet connecting valve body and is pressed and fixed in the limiting ring groove in the state that the outlet valve body and the outlet flange are fixedly connected. When the valve seat needs to be disassembled to replace the valve port pad on the valve seat, the fixing bolt between the outlet valve body and the outlet flange is removed, and after the outlet flange is removed, the valve seat can be quickly taken down, and the valve port pad on the valve seat can be replaced.

Description

Technical Field

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

[0002] In high-pressure hydrogen storage and transportation systems, pressure regulators are crucial for maintaining stable pipeline pressure. Their elastic sealing materials may swell or undergo permanent deformation due to prolonged contact with high-pressure hydrogen, directly affecting the sealing accuracy. As the sealing component directly in contact with hydrogen, the valve seat gasket is subjected to the physical and chemical erosion of high-pressure hydrogen over extended periods, as well as repeated compression during valve opening and closing. This makes the valve seat gasket prone to material degradation under high-pressure conditions, leading to seal failure.

[0003] Currently, the valve seat gasket removal and installation operations of pressure regulators are complex, and repeated removal and installation can easily damage the sealing surface or cause positioning deviations of the seal, making it difficult to guarantee the geometric accuracy of the sealing surface after the valve seat gasket is replaced. In addition, the valve seat gasket removal and installation operations in pressure regulators are time-consuming, and the system downtime caused by frequent maintenance is particularly prominent, which seriously restricts the continuous operation efficiency of hydrogen energy facilities.

[0004] 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

[0005] The purpose of this invention is to provide a new type of hydrogen pressure regulator to address the shortcomings of existing technologies.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A novel hydrogen pressure regulator includes a valve body and a valve cylinder, a valve seat, and a diaphragm assembly disposed therein. The diaphragm assembly is sleeved on the valve cylinder and connected to the valve body. The valve seat is disposed near the outlet of the valve body. The valve cylinder is disposed correspondingly to the valve seat and is slidably connected to the valve body.

[0008] The diaphragm assembly, in conjunction with the valve cylinder, divides the inner cavity of the valve body into a first cavity and a second cavity. A first through hole and a second through hole are respectively provided on the valve body corresponding to the first cavity and the second cavity. The second cavity is close to the air outlet of the valve body and is connected to the controller through the second through hole.

[0009] A spring assembly and a one-way valve are provided on the diaphragm assembly. The spring assembly is located in the first cavity. The first cavity is connected to the second cavity through the one-way valve and is connected to the air outlet of the valve body through a connecting pipe provided on the first through hole.

[0010] Furthermore, the valve body includes an inlet valve body, an outlet valve body, an inlet flange, and an outlet flange. The inlet valve body is fixedly connected to the outlet valve body, and the inlet flange and the outlet flange are fixedly connected to the inlet valve body and the outlet valve body, respectively.

[0011] An outlet connection valve body is provided near the valve seat, and the two ends of the valve cylinder are slidably connected to the inlet flange and the outlet connection valve body, respectively.

[0012] Furthermore, a first annular groove and a second annular groove are respectively formed on the inner ring of the connection end face between the outlet valve body and the outlet flange. The first annular groove and the second annular groove form a limiting annular groove, and the valve seat and the outlet connecting valve body are pressed and fixed in the limiting annular groove.

[0013] Furthermore, a valve port gasket and a pressure cap are provided on the side of the valve seat facing the valve cylinder. The valve port gasket is provided corresponding to the end face of the valve cylinder and is fixed on the valve seat by the pressure cap. An air outlet is provided on the valve seat at the outer ring of the valve port gasket.

[0014] Furthermore, the pressure cap is conical in shape, and its top end is positioned corresponding to the center of the valve cylinder.

[0015] Furthermore, the membrane assembly includes an upper membrane pressure plate, a lower membrane pressure plate, and a main membrane. The upper membrane pressure plate and the lower membrane pressure plate are fixedly connected and press the inner ring of the main membrane tightly and fixedly. The outer ring of the main membrane is pressed and fixed between the inlet valve body and the outlet valve body.

[0016] Furthermore, the spring assembly includes a positioning block, a guide sleeve, and a main spring. The positioning block is slidably connected to the guide sleeve and is fixed to the diaphragm assembly and the inlet flange, respectively. The guide sleeve is disposed on the outer ring of the positioning block, and the main spring is sleeved on the guide sleeve, with its two ends abutting against the diaphragm assembly and the inlet flange, respectively.

[0017] Furthermore, a valve position indicator rod is provided on the valve seat, the valve position indicator rod is connected to the diaphragm assembly, and is installed on the valve body through a valve position sealing cover.

[0018] The beneficial effects of this utility model are as follows:

[0019] In this application, the valve seat gasket is fixed by a conical gland. The conical gland can guide the airflow to diffuse towards the outlet hole of the outer ring of the valve seat, reduce the local flow velocity, and improve the erosion resistance of the valve seat gasket. The outer ring of the valve seat and the outlet connecting valve body abut against each other and is pressed and fixed in the limiting ring groove when the outlet valve body and the outlet flange are fixedly connected. When it is necessary to disassemble the valve seat to replace the valve seat gasket, the fixing bolts between the outlet valve body and the outlet flange are released, and the outlet flange is removed, so that the valve seat can be quickly removed and the valve seat gasket can be replaced. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic cross-sectional view of the novel hydrogen pressure regulator of this utility model;

[0022] Figure 2 This is an explosion diagram of the novel hydrogen pressure regulator of this utility model;

[0023] Figure 3 This is a schematic diagram of the valve seat structure in this utility model;

[0024] Figure 4 This is a schematic diagram of the membrane assembly in this utility model.

[0025] Reference numerals: 1. Valve body; 11. First cavity; 111. First through hole; 12. Second cavity; 121. Second through hole; 13. Inlet valve body; 14. Outlet valve body; 15. Inlet flange; 16. Outlet flange; 17. Outlet connecting valve body; 18. Limiting annular groove; 181. First annular groove; 182. Second annular groove; 2. Valve cylinder; 3. Valve seat; 31. Valve port gasket; 32. Pressure cap; 33. Vent hole; 4. Diaphragm assembly; 41. Upper diaphragm pressure plate; 42. Lower diaphragm pressure plate; 43. Main diaphragm; 5. Spring assembly; 51. Positioning block; 52. Guide sleeve; 53. Main spring; 6. Check valve; 7. Valve position indicator rod; 71. Valve position sealing cap. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] like Figures 1 to 4 A novel hydrogen pressure regulator is shown, comprising a valve body 1 and a valve cylinder 2, a valve seat 3, and a diaphragm assembly 4 disposed therein. The diaphragm assembly 4 is sleeved on the valve cylinder 2 and connected to the valve body 1. The valve seat 3 is disposed near the outlet of the valve body 1. The valve cylinder 2 is disposed corresponding to the valve seat 3 and is slidably connected to the valve body 1. The diaphragm assembly 4, in conjunction with the valve cylinder 2, divides the inner cavity of the valve body 1 into a first cavity 11 and a second cavity 12. A first through hole 111 and a second through hole 121 are respectively opened on the valve body 1 corresponding to the first cavity 11 and the second cavity 12. The second cavity 12 is near the outlet of the valve body 1 and is connected to a controller through the second through hole 121. A spring assembly 5 and a one-way valve 6 are disposed on the diaphragm assembly 4. The spring assembly 5 is located in the first cavity 11. The first cavity 11 is connected to the second cavity 12 through the one-way valve 6 and is connected to the outlet of the valve body 1 through a connecting pipe disposed on the first through hole 111.

[0030] In the specific implementation process, the first chamber 11 is directly connected to the downstream pressure of the outlet through the first through hole 111 and the connecting pipe, and the outlet pressure change is sensed in real time; the second chamber 12 is connected to the command-level output terminal of the controller through the second through hole 121 to receive the control pressure signal; the downstream pressure feedback and the control pressure input are physically isolated. Furthermore, in the dynamic balance mechanism of the valve cylinder 2 in the pressure regulator, the spring assembly 5 provides a reverse force, which acts on the diaphragm assembly 4 together with the downstream pressure; the one-way valve 6 only allows unidirectional flow from the first chamber 11 to the second chamber 12, ensuring rapid compensation when the pressure is unbalanced. When the pressure in the second chamber 12 suddenly drops, the one-way valve 6 opens to replenish the pressure and prevent valve port oscillation.

[0031] Furthermore, the controller is divided into a pressure stabilizing stage (primary control) and a command stage (closed-loop control). The pressure stabilizing stage performs coarse adjustment of the intake pressure to eliminate the influence of upstream pressure fluctuations on the system. It restricts reverse flow through the one-way valve 6 and sets the basic pressure threshold in combination with the preload of the spring assembly 5. When the upstream pressure fluctuates, the pressure difference between the first chamber 11 and the second chamber 12 is dynamically adjusted through the one-way valve 6 to avoid frequent operation of the valve cylinder 2.

[0032] The command stage compares the downstream pressure with the set value in real time, generating a precise control signal to drive the position of valve cylinder 2; it receives the pressure signal from the second chamber 12 and compares it with the preset value (set via the adjusting nut); when the downstream pressure decreases, the command stage increases the output control pressure, pushing the pressure in the second chamber 12 to rise, driving valve cylinder 2 to increase the valve opening and increase the flow rate; when the downstream pressure rises, the control pressure decreases, the reverse force of the spring assembly 5 becomes dominant, and valve cylinder 2 moves to close the valve opening, suppressing the flow rate. When the downstream pressure equals the set pressure, valve cylinder 2 is in an equilibrium position, the command stage maintains the control pressure in the second chamber 12, and the pressure regulating stage keeps the check valve 6 closed.

[0033] In this embodiment, the valve body 1 includes an inlet valve body 13, an outlet valve body 14, an inlet flange 15, and an outlet flange 16. The inlet valve body 13 and the outlet valve body 14 are fixedly connected, and the inlet flange 15 and the outlet flange 16 are fixedly connected to the inlet valve body 13 and the outlet valve body 14, respectively. An outlet connecting valve body 17 is provided near the valve seat 3, and both ends of the valve cylinder 2 are slidably connected to the inlet flange 15 and the outlet connecting valve body 17, respectively.

[0034] The valve body is composed of an inlet flange 15, an inlet valve body 13, an outlet valve body 14 and an outlet flange 16 arranged axially in a fixed connection. The outlet connecting valve body 17 is provided near the valve seat 3 to support one end of the valve cylinder 2, and the inlet flange 15 supports the other end of the valve cylinder 2 to ensure that the valve cylinder 2 is installed stably.

[0035] Preferably, a first annular groove 181 and a second annular groove 182 are respectively provided on the inner ring of the connection end face of the outlet valve body 14 and the outlet flange 16. The first annular groove 181 and the second annular groove 182 form a limiting annular groove 18, and the valve seat 3 and the outlet connecting valve body 17 are pressed and fixed in the limiting annular groove 18.

[0036] The valve seat 3 abuts against the outer ring of the outlet connecting valve body 17 and is pressed and fixed in the fixed connection state between the outlet valve body 14 and the outlet flange 16. When it is necessary to disassemble the valve seat 3 to replace the valve port gasket 31 on it, the fixing bolts between the outlet valve body 14 and the outlet flange 16 are released, and the outlet flange 16 is removed, and then the valve seat 3 can be removed.

[0037] Furthermore, a valve port gasket 31 and a pressure cap 32 are provided on the side of the valve seat 3 facing the valve cylinder 2. The valve port gasket 31 is positioned corresponding to the end face of the valve cylinder 2 and is fixed to the valve seat 3 by the pressure cap 32. An air outlet 33 is provided on the valve seat 3 at the outer ring of the valve port gasket 31. The pressure cap 32 is conical, and its top end is positioned corresponding to the center of the valve cylinder 2.

[0038] Among them, the conical cap 32 guides the airflow to diffuse towards the outer ring air outlet 33, reducing the local flow velocity and effectively improving the erosion resistance of the valve port gasket 31;

[0039] In this embodiment, the membrane assembly 4 includes an upper membrane pressure plate 41, a lower membrane pressure plate 42, and a main membrane 43. The upper membrane pressure plate 41 and the lower membrane pressure plate 42 are fixedly connected and press the inner ring of the main membrane 43 tightly. The outer ring of the main membrane 43 is pressed between the inlet valve body 13 and the outlet valve body 14.

[0040] The main diaphragm 43, together with the pressure plates on both sides, can eliminate lateral force interference, and together with the lightweight valve cylinder 2 structure, it effectively improves the response time.

[0041] The spring assembly 5 includes a positioning block 51, a guide sleeve 52, and a main spring 53. The positioning block 51 is slidably connected to the guide sleeve 52 and is fixed on the diaphragm assembly 4 and the inlet flange 15 respectively. The guide sleeve 52 is disposed on the outer ring of the positioning block 51. The main spring 53 is sleeved on the guide sleeve 52, and its two ends abut against the diaphragm assembly 4 and the inlet flange 15 respectively.

[0042] The spring assembly 5 adopts a linear guiding design with guide sleeve 52 and positioning block 51 to improve the circumferential displacement accuracy of valve cylinder 2.

[0043] In this embodiment, a valve position indicator rod 7 is provided on the valve seat 3. The valve position indicator rod 7 is connected to the diaphragm assembly 4 and is installed on the valve body 1 through the valve position sealing cover 71. The valve position indicator rod 7 is linked to the diaphragm assembly 4 to monitor the opening degree of the valve cylinder 2 in real time and provide data input for the control system.

[0044] 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 pressure regulator, characterized in that, The valve includes a valve body and a valve cylinder, a valve seat, and a diaphragm assembly disposed therein. The diaphragm assembly is sleeved on the valve cylinder and connected to the valve body. The valve seat is disposed near the air outlet of the valve body. The valve cylinder is disposed correspondingly to the valve seat and is slidably connected to the valve body. The diaphragm assembly, in conjunction with the valve cylinder, divides the inner cavity of the valve body into a first cavity and a second cavity. A first through hole and a second through hole are respectively provided on the valve body corresponding to the first cavity and the second cavity. The second cavity is close to the air outlet of the valve body and is connected to the controller through a connecting pipe provided on the second through hole. A spring assembly and a one-way valve are provided on the diaphragm assembly. The spring assembly is located in the first cavity. The first cavity is connected to the second cavity through the one-way valve and is connected to the air outlet of the valve body through a connecting pipe provided on the first through hole.

2. The novel hydrogen pressure regulator according to claim 1, characterized in that, The valve body includes an inlet valve body, an outlet valve body, an inlet flange, and an outlet flange. The inlet valve body is fixedly connected to the outlet valve body, and the inlet flange and the outlet flange are fixedly connected to the inlet valve body and the outlet valve body, respectively. An outlet connection valve body is provided near the valve seat, and the two ends of the valve cylinder are slidably connected to the inlet flange and the outlet connection valve body, respectively.

3. The novel hydrogen pressure regulator according to claim 2, characterized in that, A first annular groove and a second annular groove are respectively formed on the inner ring of the connection end face between the outlet valve body and the outlet flange. The first annular groove and the second annular groove form a limiting annular groove. The valve seat and the outlet connecting valve body are pressed and fixed in the limiting annular groove.

4. The novel hydrogen pressure regulator according to claim 1, characterized in that, A valve port gasket and a pressure cap are provided on the side of the valve seat facing the valve cylinder. The valve port gasket is provided corresponding to the end face of the valve cylinder and is fixed on the valve seat by the pressure cap. An air outlet is provided on the valve seat at the outer ring of the valve port gasket.

5. The novel hydrogen pressure regulator according to claim 4, characterized in that, The pressure cap is conical, and its top end is positioned at the center of the valve cylinder.

6. The novel hydrogen pressure regulator according to claim 2, characterized in that, The membrane assembly includes an upper membrane pressure plate, a lower membrane pressure plate, and a main membrane. The upper membrane pressure plate and the lower membrane pressure plate are fixedly connected and press the inner ring of the main membrane tightly and fixedly. The outer ring of the main membrane is pressed and fixed between the inlet valve body and the outlet valve body.

7. The novel hydrogen pressure regulator according to claim 2, characterized in that, The spring assembly includes a positioning block, a guide sleeve, and a main spring. The positioning block is slidably connected to the guide sleeve and is fixed to the diaphragm assembly and the inlet flange, respectively. The guide sleeve is disposed on the outer ring of the positioning block, and the main spring is sleeved on the guide sleeve, with its two ends abutting against the diaphragm assembly and the inlet flange, respectively.

8. The novel hydrogen pressure regulator according to claim 2, characterized in that, A valve position indicator rod is provided on the valve seat. The valve position indicator rod is connected to the diaphragm assembly and is installed on the valve body through a valve position sealing cover.

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