Integrated pressure reducing valve

Abstract

The utility model discloses an integrated pressure reducing valve which comprises a pressure reducing valve body and an air inlet formed in the upper end of the pressure reducing valve body. When equipment is used, when the system gas pressure fluctuates or the system is damaged to cause pressure rise, the pressure of the second-stage pressure reduction part rises accordingly, when the critical value of the pressure relief valve is reached, the pressure relief valve element is opened, gas is discharged through the pressure relief valve, the system pressure is reduced, breathing openings are formed in the first-stage pressure reduction part and the second-stage pressure reduction part respectively, and when the pressure relief valve works, the pressure relief valve element is opened. The first-stage valve rod and the second-stage valve rod move, the volume of a cavity between two sealing faces of the valve rod combination can change accordingly, gas in the cavity can flow in and flow out, a breathing opening is provided with a waterproof breathable filtering device, and the situation that impurities pollute the cavity and sealing elements, and consequently the pressure reducing valve fails is avoided. The integrated pressure reducing valve is used for monitoring the gas pressure of the second-stage pressure reducing part, and through the arrangement of the two-stage pressure reducing function, the integrated pressure reducing valve is stable in performance and high in durability.

Description

Technical Field

[0001] The utility model belongs to the technical field related to new energy, and specifically relates to an integrated pressure reducing valve. Background Art

[0002] An integrated pressure reducing valve is a device that integrates pressure reducing functions with other valve functions (such as manual shutoff, safety pressure relief, and pressure sensing) in a single valve body. This design reduces connection points and potential leaks while providing a more compact and lightweight solution. Integrated pressure reducing valves are commonly used in systems requiring multiple control functions, such as hydrogen supply systems for fuel cell vehicles and hydraulic systems. The integrated pressure reducing valve design improves system reliability and safety while simplifying installation and maintenance. The utility model's integrated pressure reducing valve primarily comprises a pressure relief valve, an air inlet, a first-stage breathing port, a pressure reducing valve body, a pressure sensor, a second-stage breathing port, a first-stage valve stem, a second-stage valve stem, an air outlet, a first-stage pressure reducing section, and a second-stage pressure reducing section. Existing integrated pressure reducing valves suffer from unstable performance, complex structure, and low durability during use, making an integrated pressure reducing valve essential. Utility Model Content

[0003] The purpose of the utility model is to provide an integrated pressure reducing valve to solve the problems of unstable performance, complex structure and low durability of the existing integrated pressure reducing valve in use as mentioned in the background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: an integrated pressure reducing valve, comprising

[0005] A pressure reducing valve body and an air inlet provided at an upper end of the pressure reducing valve body;

[0006] An air outlet is provided at the lower end of the pressure reducing valve body, and a first-level breathing port is provided at the left side of the pressure reducing valve body;

[0007] A pressure relief valve is installed at a lower right side of the pressure reducing valve body, and a secondary breathing port is provided on the right side of the pressure reducing valve body and above the pressure relief valve;

[0008] A pressure sensor is provided at the front of the pressure reducing valve body;

[0009] A first-stage pressure reducing part and a second-stage pressure reducing part are respectively provided on the left and right sides of the interior of the pressure reducing valve body;

[0010] A primary valve stem is provided at an inner position of the primary pressure reducing portion, and a secondary valve stem is provided at an inner position of the secondary pressure reducing portion;

[0011] The provision of the integrated pressure reducing valve makes the layout compact, the structure simple, and the weight lightweight, saving material and processing costs. The provision of the two-stage pressure reducing function makes the integrated pressure reducing valve stable in performance, simple in structure, and durable. The provision of the pressure relief valve and the pressure sensor protects the safety of the hydrogen supply system and the fuel cell.

[0012] Preferably, a sealing base is installed at an inner side of the pressure relief valve, and a sealing pipe is connected to the inner side of the pressure relief valve and at a right side of the sealing base.

[0013] Preferably, a sealing sleeve is provided at the inner side of the sealing base and the sealing tube, and a sealing coating is evenly applied on the inner wall of the sealing sleeve.

[0014] Preferably, the sealing base and the sealing tube are both made of rubber material, the sealing sleeve is made of polyethylene material, and the sealing coating is made of acrylic material. The sealing performance of the pressure relief valve is enhanced by the arrangement of the sealing base, the sealing tube, the sealing sleeve and the sealing coating.

[0015] Preferably, protrusions are provided at positions around the outer sides of the sealing base and the sealing tube, and a groove is provided on the inner side of the pressure relief valve and at positions outside the protrusions.

[0016] Preferably, the protrusion and the groove are connected by a snap-fitting manner. The arrangement of the protrusion and the groove enhances the stability of the installation of the sealing base and the sealing tube.

[0017] Preferably, the inner walls of the sealing base and the sealing tube are provided with internal threads, and the outer wall of the sealing sleeve is provided with external threads.

[0018] Preferably, the sealing sleeve is connected to the sealing base and the internal thread of the inner wall of the sealing tube through the external thread of the outer wall, so that the sealing sleeve is installed on the inner side of the sealing base and the sealing tube. The setting of the internal thread and the external thread enhances the convenience of connecting the sealing sleeve with the sealing base and the sealing tube.

[0019] Compared with the prior art, the present invention provides an integrated pressure reducing valve with the following beneficial effects:

[0020] In this integrated pressure reducing valve, when using the integrated pressure reducing valve, first install the pressure reducing valve body into the high-pressure hydrogen supply pipeline. It is the most important device before hydrogen enters the fuel cell. When working, 35 MPa high-pressure hydrogen is input from the air inlet, and passes through the first-level pressure reducing part to reduce the gas pressure by about 80%-90%. The gas then flows into the second-level part and continues to reduce the pressure to meet the use requirements of the fuel cell. When the system gas pressure fluctuates or the system is damaged, resulting in an increase in pressure, the pressure of the second-level pressure reducing part will increase accordingly. When the critical value of the pressure relief valve is reached, the pressure relief valve core opens, and the gas is discharged through the pressure relief valve to reduce the system pressure, ensure system safety, and protect the fuel cell. The first-level breathing port and the second-level breathing port are respectively installed in the first-level pressure reducing part and the second-level pressure reducing part. When the pressure reducing valve is working, the first-level pressure reducing part As the valve stem and the secondary valve stem move, the volume of the cavity between the two sealing surfaces of the valve stem combination will change accordingly, and the gas in the cavity will flow in and out. The first breathing port and the secondary breathing port are equipped with waterproof and breathable filtering devices to prevent impurities from contaminating the cavity and sealing components, which will cause the pressure reducing valve to fail. The pressure sensor is installed in the secondary pressure reducing part to monitor the gas pressure in the secondary pressure reducing part, and the signal is transmitted to the controller for the controller to grasp the gas parameters at any time and respond. The setting of the integrated pressure reducing valve makes the layout compact, the structure simple, and the weight lightweight, saving material and processing costs. The setting of the two-stage pressure reducing function makes the integrated pressure reducing valve stable in performance, simple in structure, and strong in durability. The setting of the pressure relief valve and the pressure sensor protects the safety of the hydrogen supply system and the safety of the fuel cell.

[0021] In the integrated pressure reducing valve, when using the integrated pressure reducing valve, first apply the sealing coating to the inner wall of the sealing sleeve, then install the sealing sleeve on the inner side of the sealing base and the sealing tube, and then install the sealing base and the sealing tube on the inner side of the pressure relief valve. When the system gas pressure fluctuates or the system is damaged, resulting in a pressure increase, the pressure of the secondary pressure reducing part increases accordingly. When the critical value of the pressure relief valve is reached, the pressure relief valve core opens, and the gas is discharged through the pressure relief valve to reduce the system pressure, ensure the system safety, and protect the fuel cell. When the pressure relief valve core is not opened, the sealing sleeve, sealing base, sealing tube and sealing coating on the inner side of the pressure relief valve will prevent gas leakage. By setting the sealing base, sealing tube, sealing sleeve and sealing coating, the sealing performance of the pressure relief valve is enhanced, so that the integrated pressure reducing valve can be better used. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the integrated pressure reducing valve of the utility model.

[0023] Figure 2 This is a structural schematic diagram of the side view of the integrated pressure reducing valve of the utility model.

[0024] Figure 3 This is a structural diagram of the front view of the integrated pressure reducing valve of the utility model.

[0025] Figure 4 This is a structural schematic diagram of the side view of the integrated pressure reducing valve of the utility model.

[0026] Figure 5 This is a schematic diagram of the enlarged structure of the interior of the integrated pressure reducing valve and pressure relief valve of the utility model.

[0027] Figure 6 This is an enlarged structural diagram of the sealing base and sealing tube of the integrated pressure reducing valve of the utility model.

[0028] Figure 7 This is a schematic diagram of the enlarged structure of the interior of the sealing sleeve of the integrated pressure reducing valve of the utility model.

[0029] Figure 8 This is a schematic diagram of the internal structure of the integrated pressure reducing valve body of the utility model.

[0030] In the figure: 1. Pressure relief valve; 2. Air inlet; 3. First-stage breathing port; 4. Pressure reducing valve body; 5. Pressure sensor; 6. Second-stage breathing port; 7. Sealing coating; 8. Sealing base; 9. Sealing sleeve; 10. Sealing tube; 11. Protrusion; 12. Groove; 13. First-stage valve stem; 14. Second-stage valve stem; 15. Air outlet; 16. Second-stage pressure reducing part; 17. First-stage pressure reducing part. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The utility model provides Figure 1-8The integrated pressure reducing valve shown in the figure comprises a pressure reducing valve body 4 and an air inlet 2 arranged at the upper end of the pressure reducing valve body 4; an air outlet 15 is provided at the lower end of the pressure reducing valve body 4, and a first-stage breathing port 3 is provided on the left side of the pressure reducing valve body 4; a pressure relief valve 1 is installed at a lower right side of the pressure reducing valve body 4, and a second-stage breathing port 6 is provided on the right side of the pressure reducing valve body 4 and above the pressure relief valve 1; a pressure sensor 5 is provided at the front of the pressure reducing valve body 4; a first-stage pressure reducing portion 17 and a second-stage pressure reducing portion 16 are provided on the left and right sides of the pressure reducing valve body 4, respectively; a first-stage valve stem 13 is provided inside the first-stage pressure reducing portion 17, and a second-stage valve stem 14 is provided inside the second-stage pressure reducing portion 16; the configuration of the integrated pressure reducing valve makes the layout compact, the structure simple, the weight light, and the material and processing costs saved; the configuration of the two-stage pressure reducing function makes the integrated pressure reducing valve stable in performance, simple in structure, and strong in durability; and the configuration of the pressure relief valve 1 and the pressure sensor 5 protects the safety of the hydrogen supply system and the safety of the fuel cell.

[0033] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 8As shown, in order to make the integrated pressure reducing valve have stable performance, simple structure and strong durability, when using the integrated pressure reducing valve, the pressure reducing valve body 4 is first installed in the high-pressure hydrogen supply pipeline. It is the most important device before hydrogen enters the fuel cell. During operation, 35 MPa high-pressure hydrogen is input from the air inlet 2, and passes through the first-level pressure reducing part 17 to reduce the gas pressure by about 80%-90%. The gas then flows into the second-level part and continues to reduce the pressure to meet the use requirements of the fuel cell. When the system gas pressure fluctuates or the system is damaged, the pressure increases, and the pressure of the second-level pressure reducing part 16 increases accordingly. When the critical value of the pressure relief valve 1 is reached, the pressure relief valve 1 core opens, and the gas is discharged through the pressure relief valve 1 to reduce the system pressure, ensure system safety, and protect the fuel cell. The first-level breathing port 3 and the second-level breathing port 6 are respectively installed on the first-level pressure reducing part 17 and the second-level pressure reducing part 1 6. When the pressure reducing valve is working, the first-level valve stem 13 and the second-level valve stem 14 move, and the volume of the cavity between the two sealing surfaces of the valve stem combination will change accordingly, and the gas in the cavity will flow in and out. The first breathing port and the second-level breathing port 6 are equipped with a waterproof and breathable filter device to prevent impurities from contaminating the cavity and sealing components, causing the pressure reducing valve to fail. The pressure sensor 5 is installed in the second-level pressure reducing part 16 to monitor the gas pressure of the second-level pressure reducing part 16, and the signal is transmitted to the controller for the controller to grasp the gas parameters at any time and make a response action. The setting of the integrated pressure reducing valve makes the layout compact, the structure simple, and the weight lightweight, saving material and processing costs. The setting of the two-stage pressure reducing function makes the integrated pressure reducing valve stable in performance, simple in structure, and strong in durability. The setting of the pressure relief valve 1 and the pressure sensor 5 protects the safety of the hydrogen supply system and the safety of the fuel cell.

[0034] A sealing base 8 is installed at the inner side of the pressure relief valve 1, and a sealing tube 10 is connected to the inner side of the pressure relief valve 1 and at the right side of the sealing base 8. A sealing sleeve 9 is provided at the inner side of the sealing base 8 and the sealing tube 10, and a sealing coating 7 is evenly applied on the inner wall of the sealing sleeve 9. The sealing base 8 and the sealing tube 10 are both made of rubber material, the sealing sleeve 9 is made of polyethylene material, and the sealing coating 7 is made of acrylic material. The sealing performance of the pressure relief valve 1 is enhanced by the arrangement of the sealing base 8, the sealing tube 10, the sealing sleeve 9 and the sealing coating 7.

[0035] like Figure 1 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown, in order to enhance the sealing performance of the pressure relief valve 1, when using the integrated pressure reducing valve, first apply the sealing coating 7 to the inner wall of the sealing sleeve 9, then install the sealing sleeve 9 on the inner side of the sealing base 8 and the sealing tube 10, and then install the sealing base 8 and the sealing tube 10 on the inner side of the pressure relief valve 1. When the system gas pressure fluctuates or the system is damaged, resulting in a pressure increase, the pressure of the secondary pressure reducing part 16 increases accordingly. When the critical value of the pressure relief valve 1 is reached, the pressure relief valve 1 core opens, and the gas is discharged through the pressure relief valve 1 to reduce the system pressure, ensure system safety, and protect the fuel cell. When the pressure relief valve 1 core is not opened, the sealing sleeve 9, sealing base 8, sealing tube 10 and sealing coating 7 on the inner side of the pressure relief valve 1 will prevent gas leakage. By setting the sealing base 8, sealing tube 10, sealing sleeve 9 and sealing coating 7, the sealing performance of the pressure relief valve 1 is enhanced, so that the integrated pressure reducing valve can be better used.

[0036] Protrusions 11 are provided on the outer sides of the sealing base 8 and the sealing tube 10, and grooves 12 are provided on the inner side of the pressure relief valve 1 and on the outer side of the protrusions 11. The protrusions 11 and the grooves 12 are connected by snapping. The setting of the protrusions 11 and the grooves 12 enhances the stability of the installation of the sealing base 8 and the sealing tube 10.

[0037] like Figure 5 、 Figure 6 and Figure 7 As shown, in order to enhance the installation stability of the sealing base 8 and the sealing tube 10, when using the integrated pressure reducing valve, first apply the sealing coating 7 to the inner wall of the sealing sleeve 9, and then install the sealing sleeve 9 on the inner side of the sealing base 8 and the sealing tube 10, and then insert the sealing base 8 and the sealing tube 10 into the interior of the pressure relief valve 1. When the sealing base 8 and the sealing tube 10 enter the interior of the pressure relief valve 1, the protrusions 11 on the outside of the sealing base 8 and the sealing tube 10 will be inserted into the grooves 12 on the inside of the pressure relief valve 1, so that the sealing base 8 and the sealing tube 10 are installed on the inside of the pressure relief valve 1. By setting the protrusions 11 and the grooves 12, the installation stability of the sealing base 8 and the sealing tube 10 is enhanced.

[0038] The sealing base 8 and the sealing tube 10 are provided with internal threads at the inner wall position, and the sealing sleeve 9 is provided with external threads at the outer wall position. The sealing sleeve 9 is connected to the sealing base 8 and the internal threads on the inner wall of the sealing tube 10 through the external threads on the outer wall, so that the sealing sleeve 9 is installed on the inner side of the sealing base 8 and the sealing tube 10. The setting of the internal threads and the external threads enhances the convenience of connecting the sealing sleeve 9 with the sealing base 8 and the sealing tube 10.

[0039] like Figure 5 、 Figure 6 and Figure 7As shown, in order to enhance the convenience of connecting the sealing sleeve 9 with the sealing base 8 and the sealing tube 10, when using the integrated pressure reducing valve, the sealing sleeve 9 is first connected to the sealing base 8 and the internal thread on the inner wall of the sealing tube 10 through the external thread on the outer wall, so that the sealing sleeve 9 is installed on the inner side of the sealing base 8 and the sealing tube 10, and then the protrusions 11 on the outside of the sealing base 8 and the sealing tube 10 are inserted into the groove 12 on the inner side of the pressure relief valve 1, so that the sealing base 8 and the sealing tube 10 are installed on the inner side of the pressure relief valve 1. The setting of the internal thread and the external thread enhances the convenience of connecting the sealing sleeve 9 with the sealing base 8 and the sealing tube 10.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated pressure reducing valve, characterized in that: The invention comprises a pressure reducing valve body (4) and an air inlet (2) arranged at the upper end of the pressure reducing valve body (4); an air outlet (15) is arranged at the lower end of the pressure reducing valve body (4); a first-level breathing port (3) is arranged at the left side of the pressure reducing valve body (4); a pressure relief valve (1) is installed at a lower right side of the pressure reducing valve body (4); a second-level breathing port (6) is arranged on the right side of the pressure reducing valve body (4) and above the pressure relief valve (1); a pressure sensor (5) is arranged at the front of the pressure reducing valve body (4); the left and right sides of the interior of the pressure reducing valve body (4) are A first-stage pressure reducing portion (17) and a second-stage pressure reducing portion (16) are respectively provided at both sides; a first-stage valve stem (13) is provided at an inner position of the first-stage pressure reducing portion (17), and a second-stage valve stem (14) is provided at an inner position of the second-stage pressure reducing portion (16); the provision of the integrated pressure reducing valve makes the layout compact, the structure simple, the weight light, and saves material and processing costs; the provision of the two-stage pressure reducing function makes the integrated pressure reducing valve stable in performance, simple in structure, and durable; and the provision of the pressure relief valve (1) and the pressure sensor (5) protects the safety of the hydrogen supply system and the safety of the fuel cell.

2. The integrated pressure reducing valve according to claim 1, characterized in that: A sealing base (8) is installed at an inner position of the pressure relief valve (1), and a sealing pipe (10) is connected to the inner side of the pressure relief valve (1) and at a position on the right side of the sealing base (8).

3. The integrated pressure reducing valve according to claim 2, characterized in that: A sealing sleeve (9) is provided at the inner side of the sealing base (8) and the sealing tube (10), and a sealing coating (7) is evenly applied on the inner wall of the sealing sleeve (9).

4. The integrated pressure reducing valve according to claim 3, characterized in that: The sealing base (8) and the sealing tube (10) are both made of rubber material, the sealing sleeve (9) is made of polyethylene material, and the sealing coating (7) is made of acrylic material. By arranging the sealing base (8), the sealing tube (10), the sealing sleeve (9) and the sealing coating (7), the sealing performance of the pressure relief valve (1) is enhanced.

5. The integrated pressure reducing valve according to claim 4, characterized in that: Protrusions (11) are provided at positions around the outer sides of the sealing base (8) and the sealing tube (10), and a groove (12) is provided on the inner side of the pressure relief valve (1) and at a position outside the protrusion (11).

6. The integrated pressure reducing valve according to claim 5, characterized in that: The protrusion (11) and the groove (12) are connected by means of a snap connection. The arrangement of the protrusion (11) and the groove (12) enhances the stability of the installation of the sealing base (8) and the sealing tube (10).

7. The integrated pressure reducing valve according to claim 6, characterized in that: Internal threads are provided at the inner walls of the sealing base (8) and the sealing tube (10), and external threads are provided at the outer wall of the sealing sleeve (9).

8. The integrated pressure reducing valve according to claim 7, characterized in that: The sealing sleeve (9) is connected to the sealing base (8) and the internal threads on the inner walls of the sealing tube (10) via the external threads on the outer wall, so that the sealing sleeve (9) is installed on the inner side of the sealing base (8) and the sealing tube (10). The arrangement of the internal threads and the external threads enhances the convenience of connecting the sealing sleeve (9) with the sealing base (8) and the sealing tube (10).

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