High-pressure hydrogen pressure regulating and stabilizing valve

Abstract

The utility model belongs to the technical field of valve bodies, and particularly relates to a high-pressure hydrogen pressure regulating and stabilizing valve which comprises a main valve body, a gas inlet channel, a gas outlet channel, an electromagnetic valve port, a pressure sensor base port, a safety valve connector, a pressure regulating valve port and a pressure regulating gas cavity, and the gas inlet channel, the gas outlet channel, the electromagnetic valve port, the pressure sensor base port, the safety valve connector, the pressure regulating valve port and the pressure regulating gas cavity are integrally arranged. The electromagnetic valve port is communicated with the pressure sensor base port, the pressure sensor base port is communicated with the pressure adjusting air cavity through the pressure adjusting valve port, a pull rod mechanism is arranged in the pressure sensor base port, a pressure adjusting diaphragm structure is arranged in the pressure adjusting air cavity, and the upper portion of the pull rod mechanism penetrates through the pressure adjusting valve port and is connected with the pressure adjusting diaphragm structure. The hydrogen pressure sensor has the advantages that the structure is small and exquisite, the integration degree is high, the sealing performance of the valve body can be effectively ensured, and meanwhile, the output of hydrogen pressure is more stable.

Description

Technical Field

[0001] This utility model belongs to the field of valve body technology, and in particular relates to a high-pressure hydrogen pressure regulating and stabilizing valve. Background Art

[0002] With the increasing global demand for clean energy, hydrogen energy, as a highly efficient and clean energy carrier, is gradually gaining widespread attention in the automotive field. Hydrogen fuel cell vehicles use hydrogen as fuel, and generate electricity through the reaction of hydrogen and oxygen to power the vehicle. They have significant advantages such as zero emissions and high energy conversion efficiency.

[0003] In the hydrogen supply system of hydrogen fuel cell vehicles, the high-pressure hydrogen regulator valve plays a crucial role. High-pressure hydrogen has unique physicochemical properties; its molecules are extremely small and highly permeable, placing extremely high demands on the valve's sealing materials and structure. Ordinary sealing materials cannot withstand the long-term erosion and permeation of high-pressure hydrogen, easily leading to hydrogen leakage. This not only reduces hydrogen utilization but also poses serious safety hazards. Furthermore, high-pressure hydrogen undergoes significant temperature changes during decompression, known as the Joule-Thomson effect. This temperature change can cause thermal expansion and contraction of internal valve components, affecting the valve's normal operating performance and stability, and may even lead to problems such as icing and blockage due to excessively low temperatures. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes a high-pressure hydrogen pressure regulating valve, which effectively solves the issues of easy hydrogen leakage in the valve body and unstable pressure output during operation in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-pressure hydrogen pressure regulating valve includes a main valve body. The main valve body is integrally provided with an inlet channel, an outlet channel, a solenoid valve port, a pressure sensor base port, a safety valve interface, a pressure regulating valve port, and a pressure regulating chamber. A hydrogen filter unit is installed in the inlet channel. The inlet channel is connected to the solenoid valve port. A pilot-operated solenoid valve structure is installed inside the solenoid valve port. The solenoid valve port is connected to the pressure sensor base port. The pressure sensor base port is connected to the pressure regulating chamber through the pressure regulating valve port. A pressure sensor base is installed at the pressure sensor base port. A pull rod mechanism is provided inside the pressure sensor base port. A pressure regulating diaphragm structure is provided in the pressure regulating chamber. The upper part of the pull rod mechanism passes through the pressure regulating valve port and is connected to the pressure regulating diaphragm structure. The end of the pull rod mechanism away from the pressure regulating diaphragm structure is connected to the pressure sensor base. A pressure cap that is sealed and fixed to the main valve body is provided on the pressure regulating chamber.

[0006] Furthermore, the pressure regulating diaphragm structure includes a pressure regulating screw, a pressure regulating spring, and a diaphragm. The pressure cover has a pressure regulating screw hole, and the pressure regulating screw is threaded into the pressure regulating screw hole. The pressure regulating spring is disposed inside the pressure cover, and a pressure regulating plate is disposed between the pressure regulating spring and the pressure regulating screw. The lower end of the pressure regulating screw and the upper end of the pressure regulating spring abut against the upper and lower sides of the pressure regulating plate, respectively. The edge of the diaphragm is clamped between the pressure cover and the main valve body, and the lower end of the pressure regulating spring abuts against the diaphragm. The upper end of the pull rod mechanism is connected to the diaphragm.

[0007] Furthermore, both the main valve body and the pressure cap are regular pentagonal structures. The end face of the joint between the main valve body and the pressure cap has five bolt holes. The edge of the pressure cap is provided with five pressure cap screws connected to the bolt holes. The pressure cap and the edge of the diaphragm clamped by the main valve body form a seal in the pressure regulating chamber.

[0008] Furthermore, the pressure regulating diaphragm structure also includes an upper diaphragm pressure plate, a lower diaphragm pressure plate, and fixing bolts. The upper diaphragm pressure plate is disposed above the diaphragm, and the lower diaphragm pressure plate is disposed below the diaphragm. The upper diaphragm pressure plate and the lower diaphragm pressure plate clamp the diaphragm and are fixed by the through-hole fixing bolts.

[0009] Furthermore, the pull rod mechanism includes a sealing block, a pull rod, and a sealing ring. The pull rod includes a rod body and a baffle located in the middle of the rod body. The sealing block is sleeved on the rod body and threadedly connected to the rod body. The sealing ring is located between the sealing block and the baffle.

[0010] Furthermore, the upper part of the pull rod mechanism is threadedly connected to the fixing bolt.

[0011] Furthermore, the pressure sensor base is threadedly connected to the pressure sensor base port, the pressure sensor base has a sensor mounting port, the upper end of the pressure sensor base has a pull rod insertion hole communicating with the sensor mounting port, and the lower end of the pull rod mechanism is inserted into the pull rod insertion hole.

[0012] Furthermore, a base sealing groove is provided at the pull rod insertion hole, a base sealing ring is provided in the base sealing groove, and a sealing ring cover fitted on the lower end of the pull rod mechanism is threaded to the upper part of the base sealing groove.

[0013] Furthermore, an air intake filter element is installed inside the air intake channel, and an internal hex bolt is installed at the air intake channel to abut against the air intake filter element.

[0014] Furthermore, the pilot-operated solenoid valve structure and the lever mechanism are arranged vertically.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention maintains a good sealing environment inside the pressure regulating chamber by tightening the pressure cap screw to clamp the diaphragm, reducing the chance of hydrogen leakage. At the same time, the pull rod mechanism is connected to the fixing bolts installed on the diaphragm to prevent diaphragm leakage. In addition, the pull rod mechanism, together with the diaphragm and pressure regulating spring, makes the pressure regulation of the valve body more sensitive and ensures a more stable hydrogen pressure output. This invention also has the advantages of compact structure and high integration. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the internal structure of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the rear side structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the front side structure of this utility model;

[0021] Figure 5 for Figure 4 CC section view;

[0022] Figure 6 for Figure 1 Enlarged view of section A in the middle;

[0023] Figure 7 for Figure 1 Enlarged view of section B in the middle.

[0024] In the diagram: 1. Main valve body; 2. Inlet channel; 3. Outlet channel; 4. Solenoid valve port; 41. Internal inlet pipeline; 42. Pilot-operated solenoid valve structure; 5. Pressure sensor base port; 6. Safety valve interface; 7. Pressure regulating valve port; 8. Pressure regulating chamber; 9. Pressure sensor base; 91. Sensor mounting port; 92. Pull rod insertion hole; 93. Base sealing ring; 94. Sealing ring cover; 10. Cover; 1 11. Pressure adjusting screw; 112. Pressure adjusting spring; 113. Diaphragm; 114. Upper diaphragm pressure plate; 115. Lower diaphragm pressure plate; 116. Fixing bolt; 1161. Screw; 1162. Nut; 12. Tie rod mechanism; 121. Sealing block; 122. Tie rod; 1221. Rod body; 1222. Baffle; 123. Sealing ring one; 13. Pressure adjusting plate; 14. Pressure cap screw; 15. Socket head cap bolt. DETAILED DESCRIPTION

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1-7 As shown, a high-pressure hydrogen pressure regulating valve includes a main valve body 1. The main valve body 1 is CNC machined with an inlet channel 2, an outlet channel 3, a solenoid valve port 4, a pressure sensor base port 5, a safety valve interface 6, a pressure regulating valve port 7, and a pressure regulating chamber 8. The inlet channel 2, outlet channel 3, pressure sensor base port 5, and safety valve interface 6 are all located on the front side of the main valve body 1. The pressure sensor base port 5 is located at the center of the front side of the main valve body 1. The inlet channel 2, outlet channel 3, and safety valve interface... All 6 components are arranged around the pressure sensor base opening 5. A hydrogen filter unit is installed in the air intake channel 2. This hydrogen filter unit can be similar to the hydrogen filter element in utility model patent number CN213049896U. The hydrogen filter element is directly inserted into the air intake channel 2 to filter the hydrogen and ensure its purity. The solenoid valve port 4 is located on the side of the main valve body 1 and is perpendicular to the pressure sensor base opening 5. An internal inlet connecting the pressure sensor base opening 5 to the solenoid valve base opening is provided inside. The air pipe 41, the bottom of the air intake channel 2 is connected to the internal air intake pipe 41, the air intake channel 2 is connected to the solenoid valve port 4 through the internal air intake channel, the inner wall of the solenoid valve port 4 is provided with internal threads, the solenoid valve port 4 is threadedly connected to the pilot-operated solenoid valve structure 42, the pressure regulating air chamber 8 is opened on the rear side of the main valve body 1, the pressure regulating valve port 7 is opened between the pressure regulating air chamber 8 and the pressure sensor base port 5, the pressure sensor base port 5 and the pressure regulating air chamber 8 are connected through the pressure regulating valve port 7, the... A pressure sensor base 9 is installed at the pressure sensor base port 5. A pull rod mechanism 12 is provided inside the pressure sensor base port 5. A pressure regulating diaphragm structure is provided inside the pressure regulating air chamber 8. The upper part of the pull rod mechanism 12 passes through the pressure regulating valve port 7 and is connected to the pressure regulating diaphragm structure. The end of the pull rod mechanism 12 away from the pressure regulating diaphragm structure is connected to the pressure sensor base 9. A pressure cover 10 is provided on the rear side of the main valve body 1. The pressure cover 10 is located on the upper part of the pressure regulating air chamber 8 and is sealed and fixed to the main valve body 1.

[0027] In this embodiment, the pressure regulating diaphragm structure includes a pressure regulating screw 111, a pressure regulating spring 112, and a diaphragm 113. The pressure cover 10 has a pressure regulating screw hole, and the pressure regulating screw 111 is threaded into the pressure regulating screw hole. The pressure regulating spring 112 is disposed inside the pressure cover 10. A pressure regulating plate 13 is disposed between the pressure regulating spring 112 and the pressure regulating screw 111. The lower end of the pressure regulating screw 111 and the upper end of the pressure regulating spring 112 abut against the upper and lower sides of the pressure regulating plate 13, respectively. The end face of the main valve body 1 that is in contact with the pressure cover 10 has a diaphragm slot surrounding the pressure regulating air chamber 8. The edge of the diaphragm 113 is engaged in the diaphragm slot. The edge of the diaphragm 113 is clamped between the pressure cover 10 and the main valve body 1. The lower end of the pressure regulating spring 112 abuts against the diaphragm 113. The upper end of the pull rod mechanism 12 is connected to the diaphragm 113.

[0028] In this embodiment, both the main valve body 1 and the pressure cap 10 are regular pentagonal structures. The end face of the joint between the main valve body 1 and the pressure cap 10 has five bolt holes. The edge of the pressure cap 10 is provided with five pressure cap screws 14 connected to the bolt holes. The pressure cap 10 and the edge of the diaphragm 113 held by the main valve body 1 form a seal in the pressure regulating chamber 8.

[0029] In this embodiment, the pressure regulating diaphragm structure further includes an upper diaphragm pressure plate 114, a lower diaphragm pressure plate 115, and a fixing bolt 116. The upper diaphragm pressure plate 114 is disposed above the diaphragm 113, and the lower diaphragm pressure plate 115 is disposed below the diaphragm 113. The fixing bolt 116 includes a screw 1161 and a nut 1162. The nut 1162 is located above the upper diaphragm pressure plate 114. A circular hole is formed at the center of the upper diaphragm pressure plate 114, the diaphragm 113, and the lower diaphragm pressure plate 115. The screw 1161 passes through the lower diaphragm pressure plate 115, the diaphragm 113, and the upper diaphragm pressure plate 114 sequentially from the lower diaphragm pressure plate 115 and is threadedly connected to the nut 1162. The upper diaphragm pressure plate 114 and the lower diaphragm pressure plate 115 clamp the diaphragm 113 by locking the screw 1161 and the nut 1162.

[0030] In this embodiment, the pull rod mechanism 12 includes a sealing block 121, a pull rod 122, and a sealing ring 123. The pull rod 122 includes a rod body 1221 and a baffle 1222 located in the middle of the rod body 1221. The upper end of the sealing block 121 is conical. The upper end of the sealing block 121 is close to the valve port 7 of the pressure regulating valve and matches the shape of the valve port 7. A through hole and an internal thread are provided in the middle position of the sealing block 121. The sealing block 121 is sleeved on the rod body 1221 from the upper end of the rod body 1221 and is threadedly connected to the rod body 1221. The sealing ring 123 is located between the sealing block 121 and the baffle 1222. The sealing ring is pressed by the sealing block 121 to fit the baffle 1222 to form a seal.

[0031] In this embodiment, the upper end of the pull rod 122 is provided with an external thread, and the lower end of the screw 1161 is provided with an internal thread that mates with the external thread at the upper end of the pull rod 122. The upper end of the pull rod 122 is threadedly connected to the screw 1161.

[0032] In this embodiment, the pressure sensor base 9 is threadedly connected to the pressure sensor base port 5. The pressure sensor base 9 has a sensor mounting port 91 and a pull rod insertion hole 92 at its upper end. A pressure detection channel connecting the pull rod insertion hole 92 and the sensor mounting port 91 is formed between the pull rod insertion hole 92 and the sensor mounting port 91. The lower end of the pull rod mechanism 12 is inserted into the pull rod insertion hole 92.

[0033] In this embodiment, a base sealing groove is provided at the pull rod insertion hole 92, and a base sealing ring 93 is provided in the base sealing groove. A sealing ring cover 94 is provided on the upper part of the base sealing groove and is located at the lower end of the pull rod 122. The lower end of the sealing ring cover 94 is provided with external threads, and the upper inner wall of the base sealing groove is provided with internal threads. The sealing ring cover 94 is threadedly connected to the upper part of the base sealing groove and compresses the base sealing ring 93 to form a seal.

[0034] In this embodiment, an air intake filter element is installed in the air intake channel 2. The air intake filter element can be similar to the air filter element mentioned in patent application number CN207356783U. The air intake filter element is directly inserted into the air intake channel 2 for installation. An internal hex bolt 15 is installed at the air intake channel 2 to abut the air intake filter element.

[0035] In this embodiment, the pilot-operated solenoid valve structure 42 and the lever mechanism 12 are arranged vertically.

[0036] In operation, the air inlet channel 2 is connected to the air source via a pipe, and the air outlet channel 3 is connected to the air outlet pipe. The preload pressure of the pressure regulating spring 112 can be controlled by adjusting the screw 111 in and out. The gas entering the pressure regulating chamber 8 causes the diaphragm 113 to deform. The deformation of the diaphragm 113 causes the pull rod 122 to move, thereby controlling the opening degree of the sealing block 121 on the pull rod 122 and the valve port 7 of the pressure regulating valve, making the pressure more stable. The elastic potential energy of the pressure regulating spring 112 prevents the deformation of the diaphragm 113 from being too large, and the pressure stabilization process is more linear.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-pressure hydrogen pressure regulating and stabilizing valve, characterized in that: The system includes a main valve body, which integrally comprises an air inlet channel, an air outlet channel, a solenoid valve port, a pressure sensor base port, a safety valve interface, a pressure regulating valve port, and a pressure regulating chamber. The air inlet channel is equipped with a hydrogen filter unit and is connected to the solenoid valve port. A pilot-operated solenoid valve structure is installed inside the solenoid valve port, which is connected to the pressure sensor base port. The pressure sensor base port is connected to the pressure regulating chamber via the pressure regulating valve port. A pressure sensor base is installed at the pressure sensor base port, and a pull rod mechanism is installed inside the pressure sensor base port. A pressure regulating diaphragm structure is installed inside the pressure regulating chamber. The upper part of the pull rod mechanism passes through the pressure regulating valve port and connects to the pressure regulating diaphragm structure. The end of the pull rod mechanism away from the pressure regulating diaphragm structure is connected to the pressure sensor base. A pressure cap, which is sealed and fixed to the main valve body, is installed on the pressure regulating chamber.

2. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 1, characterized in that: The pressure regulating diaphragm structure includes a pressure regulating screw, a pressure regulating spring, and a diaphragm. The pressure cover has a pressure regulating screw hole, and the pressure regulating screw is threaded into the pressure regulating screw hole. The pressure regulating spring is disposed inside the pressure cover, and a pressure regulating plate is disposed between the pressure regulating spring and the pressure regulating screw. The lower end of the pressure regulating screw and the upper end of the pressure regulating spring abut against the upper and lower sides of the pressure regulating plate, respectively. The edge of the diaphragm is clamped between the pressure cover and the main valve body, and the lower end of the pressure regulating spring abuts against the diaphragm. The upper end of the pull rod mechanism is connected to the diaphragm.

3. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 2, characterized in that: Both the main valve body and the pressure cap are regular pentagonal structures. The end face of the joint between the main valve body and the pressure cap has five bolt holes. Five pressure cap screws connected to the bolt holes are passed through the edge of the pressure cap. The edge of the diaphragm held by the pressure cap and the main valve body forms a seal in the pressure regulating chamber.

4. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 2, characterized in that: The pressure regulating diaphragm structure also includes an upper diaphragm pressure plate, a lower diaphragm pressure plate, and fixing bolts. The upper diaphragm pressure plate is located above the diaphragm, and the lower diaphragm pressure plate is located below the diaphragm. The upper diaphragm pressure plate and the lower diaphragm pressure plate clamp the diaphragm and are fixed by the through-hole fixing bolts.

5. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 1, characterized in that: The pull rod mechanism includes a sealing block, a pull rod, and a sealing ring. The pull rod includes a rod body and a baffle located in the middle of the rod body. The sealing block is sleeved on the rod body and threadedly connected to the rod body. The sealing ring is located between the sealing block and the baffle.

6. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 4, characterized in that: The upper part of the pull rod mechanism is threadedly connected to the fixing bolt.

7. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 4, characterized in that: The pressure sensor base is threadedly connected to the pressure sensor base port. The pressure sensor base has a sensor mounting port. The upper end of the pressure sensor base has a pull rod insertion hole that communicates with the sensor mounting port. The lower end of the pull rod mechanism is inserted into the pull rod insertion hole.

8. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 7, characterized in that: A base sealing groove is provided at the pull rod insertion hole, and a base sealing ring is provided in the base sealing groove. A sealing ring cover is threadedly connected to the upper part of the base sealing groove and fitted onto the lower end of the pull rod mechanism.

9. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 1, characterized in that: An air intake filter is installed inside the air intake channel, and an internal hex bolt is installed at the air intake channel to abut against the air intake filter.

10. The high-pressure hydrogen pressure regulating and stabilizing valve according to claim 1, characterized in that: The pilot-operated solenoid valve structure and the lever mechanism are arranged vertically.

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