CN216078464U - Novel pressure reducing valve - Google Patents

Abstract

The application discloses a novel relief pressure valve. The novel pressure reducing valve comprises a pressure reducing valve body, wherein a valve rod, a sealing seat, a piston, a tightening cap and a valve seat are arranged in the pressure reducing valve body, the upper end of the piston is provided with a main spring, the tightening cap is internally provided with an adjusting screw rod and a spring upper seat, the adjusting screw rod can adjust the spring force of the main spring, the valve rod, the sealing seat and the valve seat are surrounded to form a high-pressure cavity, the piston, the pressure-reducing valve body and the valve rod are surrounded to form a pressure-stabilizing cavity, the pressure reducing valve body is internally provided with an air inlet channel and an air outlet channel, the valve rod is provided with a valve rod shoulder part, high-pressure gas enters the high-pressure cavity from the air inlet channel, the shoulder part of the valve rod and the sealing seat form a flow passage, gas flows into the pressure stabilizing cavity from the high-pressure cavity, the piston can be subjected to downward spring force of the main spring, upward air pressure and frictional resistance of the pressure stabilizing cavity, and the spring force of the main spring can be adjusted by adjusting the stroke of the adjusting screw rod.

Description

Novel pressure reducing valve

Technical Field

The utility model relates to the technical field of gas pressure reduction, in particular to a novel pressure reducing valve.

Background

In recent years, the hydrogen fuel cell industry has rapidly developed, and the demand for hydrogen supply system products has also become higher and higher. The fuel of the hydrogen fuel cell is stored in a hydrogen storage bottle, the pressure in the common hydrogen storage bottle is 35MPa, the pressure of hydrogen in the hydrogen storage bottle which is newly developed at present reaches 70MPa, and when the hydrogen in the hydrogen storage bottle is conveyed to the fuel cell for use, the pressure in the hydrogen storage bottle is too high, and the hydrogen in the hydrogen storage bottle needs to be decompressed through a decompression valve. The pressure reducing valve in the current market is not mature, and has the problems of large pressure fluctuation at the rear end of pressure reduction, unstable output pressure and flow, sealing leakage, poor long-term use reliability and the like. The utility model provides a novel relief pressure valve through the balanced structure design of piston with the valve rod for the operating pressure fluctuation of relief pressure valve is little, and output flow is stable, and is sealed reliable, the good reliability, and product processing technology is simple relatively, has reduced manufacturing cost.

Disclosure of Invention

The main aim at of this application provides a novel relief pressure valve to it is big to solve current relief pressure valve pressure oscillation, and output flow is unstable, the poor scheduling problem of reliability.

To achieve the above object, according to one aspect of the present application, a novel pressure reducing valve is provided.

According to the application, the novel pressure reducing valve comprises a pressure reducing valve body, wherein a valve rod, a sealing seat, a piston, a tightening cap and a valve seat are arranged in the pressure reducing valve body, a main spring is arranged at the upper end of the piston, an adjusting screw and a spring upper seat are arranged in the tightening cap, the adjusting screw can adjust the spring force of the main spring, the valve rod, the sealing seat and the valve seat surround to form a high-pressure cavity, the piston, the pressure reducing valve body and the valve rod surround to form a pressure stabilizing cavity, an air inlet channel and an air outlet channel are arranged in the pressure reducing valve body, a valve rod shoulder is arranged on the valve rod, high-pressure gas enters the high-pressure cavity from the air inlet channel, the valve rod shoulder and the sealing seat form a circulation channel, gas flows into the pressure stabilizing cavity from the high-pressure cavity, the piston can receive the downward spring force of the main spring, the upward air pressure and the friction resistance of the pressure stabilizing cavity can adjust the spring force of the main spring by adjusting screw stroke, when the spring force is greater than the resultant force of the air pressure and the friction resistance, the piston drives the valve rod to move downwards, the flow area between the valve rod and the sealing seat is increased, the pressure in the pressure stabilizing cavity is increased, so that the piston reaches a balanced state, when the air pressure is greater than the resultant force of the spring force and the friction resistance, the piston drives the valve rod to move upwards, the flow area between the valve rod and the sealing seat is reduced, the pressure in the pressure stabilizing cavity is reduced, so that the piston reaches the balanced state, the flow passage area of the shoulder part of the valve rod is automatically adjusted through the stress balance of the piston, so that the decompression and stable output of high-pressure gas are realized, the decompressed stable gas is output through the gas outlet channel, and the stress condition of the valve rod is not influenced by the pressure value in the high-pressure cavity.

Further, a sealing element is arranged between the valve seat and the valve rod, a sealing element is arranged between the pressure reducing valve body and the valve seat, a sealing element is arranged between the pressure reducing valve body and the piston, so that sealing at each position is realized, an upper limit is arranged on the tightening cap, a lower limit is arranged on the pressure reducing valve body, the piston moves between the upper limit and the lower limit, and the upper limit and the lower limit can also be arranged at other positions which can be limited, so that the piston moves within a set stroke range.

Furthermore, the pressure reducing valve comprises a first variant structure, a pressing block is arranged in the pressure reducing valve body, a second channel is arranged on the pressing block and is communicated with the air outlet channel, the pressure reducing valve body and the lower end of the valve rod are surrounded to form a buffer cavity, a first channel is arranged on the valve rod and is communicated with the buffer cavity and the pressure stabilizing cavity.

Furthermore, the pressure reducing valve comprises a second variant structure, a return spring is arranged in the buffer cavity, and a plurality of springs such as a main spring, an auxiliary spring and the like can be arranged between the tightening cap and the piston according to requirements so as to meet the requirement of balance stress of the piston.

Furthermore, the pressure reducing valve comprises a third variant structure, a high-pressure sealing element and a screw plug are arranged in a lower end hole of the pressure reducing valve body, and a check ring is arranged at the lower end of the high-pressure sealing element when the pressure in the high-pressure cavity is higher so as to meet the sealing requirement.

Further, the pressure reducing valve comprises a fourth variant structure, and the lower end of the valve rod bears the air pressure of the high-pressure cavity.

Furthermore, the pressure reducing valve comprises a fifth variant structure, a gas inlet joint, a pressure reducing valve core and a third channel are arranged on the pressure reducing valve body, a filter element is arranged between the gas inlet joint and the pressure reducing valve core, a throttling hole is arranged on the pressure reducing valve core, a gas inlet hole is arranged on the gas inlet joint, high-pressure gas enters from the gas inlet hole, after being filtered by the filter element, flows through the throttling hole for primary pressure reduction, the gas after primary pressure reduction is introduced into a high-pressure cavity, a flow gap between a shoulder part of the valve rod and the sealing seat carries out secondary pressure reduction on the gas, the gas after pressure reduction flows to the gas outlet channel, a plurality of pressure reducing valve cores can be arranged in the pressure reducing valve body according to requirements to realize multi-stage pressure reduction, a pressure limiting valve is arranged at the rear end of the third channel, when the pressure in the pressure stabilizing cavity is greater than a set value, the gas is discharged from the pressure limiting valve channel, and a stop valve is arranged at the rear end of the gas outlet channel, the stop valve can close the air outlet channel.

Furthermore, connecting piece and sealing member are arranged between the piston and the valve rod to realize connection between the piston and the valve rod, and the connecting mode between the piston and the valve rod comprises a threaded connection mode, a piston pin connection mode, a check ring connection mode, a bolt connection mode, a universal joint connection mode, a thrust contact connection mode, a clamping groove connection mode, an interference connection mode, a bolt connection mode and other modes capable of realizing connection.

Furthermore, the sealing structure form of the valve rod and the sealing seat comprises a conical surface sealing structure, a line contact sealing structure, a spherical surface sealing structure, a plane sealing structure, a sealing gasket sealing structure, a sealing ring plus a sealing gasket and other sealing structure forms.

Furthermore, the sealing structure between the valve rod and the pressure reducing valve body comprises a plurality of sealing structure forms such as a universal plug seal, a universal plug and check ring seal, a sealing ring and check ring seal, a sealing ring and double check ring seal and the like.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the utility model and do not limit it. In the drawings:

FIG. 1 is a schematic illustration of a pressure relief valve according to an embodiment of the present application;

FIG. 2 is a schematic illustration of a pressure relief valve closed condition according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a first variation of a pressure relief valve according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a second variation of a pressure relief valve according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a third variation of a pressure relief valve according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a fourth variation of a pressure relief valve according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a fifth variation of a pressure reducing valve according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a different connection of a piston to a valve stem according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a pressure relief valve body and a valve stem in different sealing configurations according to an embodiment of the present application;

fig. 10 is a schematic diagram of different connection structures of a piston and a valve rod according to an embodiment of the application.

Reference numerals:

01, a pressure reducing valve body; 02 a valve stem; 03 sealing seat; 04, pressing blocks; 05 piston; 06 tightening the cap; 07 a main spring; 08 a spring upper seat; 09 nut; 10 adjusting the screw rod; 11 a connecting piece; 12 a seal member; 13 a seal member; 14 a seal member; 15 a valve stem shoulder; 16 a seal member; 17 an intake passage; limiting at 18; limiting under 19; 20 a first channel; 21 a second channel; 22 a return spring; 23 pairs of springs; 24 a third channel; 25 a pressure limiting valve; 26 a stop valve; 27 an air inlet connector; 28 a filter element; 29 a pressure reducing valve core; a 30 orifice; 31 air intake holes; 32 valve seats; 33 a seal member; 34 a vent hole; 35 a buffer chamber; 36 high pressure chambers; 37 a pressure stabilizing cavity; 38 an air outlet channel; 39 high pressure seals; 40 a retainer ring; 41 screw plug.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the utility model and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 and 2, the present application relates to a novel pressure reducing valve, which comprises a pressure reducing valve body 01, a valve rod 02, a sealing seat 03, a piston 05, a tightening cap 06 and a valve seat 32 are arranged in the pressure reducing valve body 01, a main spring 07 is arranged at the upper end of the piston 05, an adjusting screw 10 and a spring upper seat 08 are arranged in the tightening cap 06, the adjusting screw 10 can adjust the spring force of the main spring 07, the valve rod 02, the sealing seat 03 and the valve seat 32 surround to form a high-pressure cavity 36, the piston 05, the pressure reducing valve body 01 and the valve rod 02 surround to form a pressure stabilizing cavity 37, an air inlet channel 17 and an air outlet channel 38 are arranged in the pressure reducing valve body 01, a valve rod shoulder part 15 is arranged on the valve rod 02, high-pressure air enters the high-pressure cavity 36 from the air inlet channel 17, the valve rod shoulder part 15 and the sealing seat 03 form a circulation channel, the air flows into the pressure stabilizing cavity 37 from the high-pressure cavity 36, the piston 05 can be subjected to downward spring force of the main spring 07, and upward air pressure and frictional resistance of the pressure stabilizing cavity 37 are achieved. By adjusting the stroke of the adjusting screw, the spring force of the main spring 07 can be adjusted. The piston 05 is connected to the valve stem 02 via a coupling 11, and a seal 16 is provided between the coupling 11 and the piston 05.

When the spring force is greater than the resultant force of the air pressure and the friction resistance, the piston 05 drives the valve rod 02 to move downwards, the flow area between the valve rod 02 and the sealing seat 03 is increased, and the pressure in the pressure stabilizing cavity 37 is increased, so that the piston 05 reaches a balanced state. When the air pressure is greater than the resultant force of the spring force and the frictional resistance, the piston 05 drives the valve rod 02 to move upwards, the flow area between the valve rod 02 and the sealing seat 03 is reduced, the pressure in the pressure stabilizing cavity 37 is reduced, so that the piston 05 reaches a balanced state, the flow passage area of the valve rod shoulder 15 is automatically adjusted through the stress balance of the piston 05, the decompression and stable output of high-pressure gas are realized, the decompressed stable gas is output through the gas outlet passage 38, and the stress condition of the valve rod 02 is not influenced by the pressure value in the high-pressure cavity 36.

Set up sealing member 12 between disk seat 32 and the valve rod 02, set up sealing member 33 between decompression valve body 01 and the disk seat 32, set up sealing member 14 between decompression valve body 01 and the piston 05, thereby realize everywhere sealed, set up spacing 18 on the tight cap 06, set up spacing 19 down on the decompression valve body 01, piston 05 moves between spacing 18 and the lower spacing 19 of last, it can spacing position in other also can set up to go up spacing 18 and lower spacing 19, in order to realize that piston 05 moves in setting for the stroke range.

As shown in fig. 3, the pressure reducing valve comprises a first modified structure, a compression block 04 is arranged in a pressure reducing valve body 01, a second channel 21 is arranged on the compression block 04, the second channel 21 is communicated with an air outlet channel 38, the lower ends of the pressure reducing valve body 01 and a valve rod 02 are surrounded to form a buffer cavity 35, a pressure stabilizing cavity 37 is formed by surrounding of a piston 05, the compression block 04 and the valve rod 02, a first channel 20 is arranged on the valve rod 02, and the first channel 20 is communicated with the buffer cavity 35 and the pressure stabilizing cavity 37.

As shown in fig. 4, the pressure reducing valve includes a second modified structure, a return spring 22 is arranged in the buffer cavity 35, and a plurality of springs such as a main spring 07, an auxiliary spring 23 and the like can be arranged between the tightening cap 06 and the piston 05 according to requirements, so as to meet the requirement of the piston 05 on balanced stress.

As shown in fig. 5, the pressure reducing valve includes a third modified structure, a high-pressure sealing member 39 and a plug screw 41 are arranged in a lower end hole of a pressure reducing valve body 01, and a retainer ring 40 is arranged at the lower end of the high-pressure sealing member 39 when the pressure in the high-pressure chamber 36 is high, so as to meet the sealing requirement.

As shown in fig. 6, the pressure reducing valve includes a fourth modified structure in which the lower end of the stem 02 receives the air pressure of the high pressure chamber 36.

As shown in fig. 7, the pressure reducing valve includes a fifth modified structure, a pressure reducing valve body 01 is provided with an air inlet joint 27, a pressure reducing valve core 29 and a third channel 24, a filter element 28 is arranged between the air inlet joint 27 and the pressure reducing valve core 29, the pressure reducing valve core 29 is provided with a throttle hole 30, the air inlet joint 27 is provided with an air inlet hole 31, high-pressure air enters from the air inlet hole 31, after being filtered by the filter element 28, the air after primary pressure reduction flows through the throttle hole 30 to be subjected to primary pressure reduction, the air after primary pressure reduction is introduced into a high-pressure chamber 36, a flow gap between a valve rod shoulder 15 and a seal seat 03 is subjected to secondary pressure reduction, the gas after pressure reduction flows to an air outlet channel 38, a plurality of pressure reducing valve cores 29 can be arranged in the pressure reducing valve body 01 according to requirements to realize multi-stage pressure reduction, the rear end of the third channel 24 is provided with a pressure limiting valve 25, when the pressure in a pressure stabilizing chamber 37 is greater than a set value, the air is discharged from the pressure limiting valve 25, the rear end of the air outlet channel 38 is provided with a stop valve 26, the shutoff valve 26 may close the air outlet passage 38.

As shown in fig. 8, the connection between the piston 05 and the valve rod 02 can be realized in various manners, including a threaded connection, a piston pin connection, a check ring connection, a latch connection, a universal joint connection, a thrust contact connection, a clamping groove connection, an interference connection, a bolt connection and other manners.

As shown in fig. 9, the sealing structure of the valve stem 02 and the sealing seat 03 includes a plurality of sealing structures such as a conical surface seal, a line contact seal, a spherical surface seal, a planar seal, a gasket seal, a sealing ring + a gasket seal, and the like.

As shown in fig. 10, the sealing structure between the valve rod 02 and the pressure reducing valve body 01 includes a plurality of sealing structure forms, such as a flooding plug seal, a flooding plug + retainer ring seal, a sealing ring + retainer ring seal, a sealing ring + double retainer ring seal, and the like. The sealing elements such as the sealing ring, the check ring, the flooding plug structure and the like can be placed on the valve rod 02 for hole structure sealing, can also be placed on the pressure reducing valve body 01 for shaft structure sealing, and are designed and determined according to the installation and arrangement space of the pressure reducing valve.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. The application is not limited to the field of ejector technology, but also includes other technical fields requiring the application of control valve products. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (8)

1. A novel pressure reducing valve is characterized by comprising a pressure reducing valve body, wherein a valve rod, a sealing seat, a piston, a tightening cap and a valve seat are arranged in the pressure reducing valve body, the upper end of the piston is provided with a main spring, the tightening cap is internally provided with an adjusting screw rod and a spring upper seat, the adjusting screw rod can adjust the spring force of the main spring, the valve rod, the sealing seat and the valve seat are surrounded to form a high-pressure cavity, the piston, the pressure-reducing valve body and the valve rod are surrounded to form a pressure-stabilizing cavity, the pressure reducing valve body is internally provided with an air inlet channel and an air outlet channel, the valve rod is provided with a valve rod shoulder part, high-pressure gas enters the high-pressure cavity from the air inlet channel, the shoulder part of the valve rod and the sealing seat form a flow passage, gas flows into the pressure stabilizing cavity from the high-pressure cavity, the piston can be subjected to downward spring force of the main spring, upward air pressure and frictional resistance of the pressure stabilizing cavity, and the spring force of the main spring can be adjusted by adjusting the stroke of the adjusting screw rod.

2. The novel pressure reducing valve as claimed in claim 1, wherein a sealing member is disposed between the valve seat and the valve rod, a sealing member is disposed between the pressure reducing valve body and the valve seat, a sealing member is disposed between the pressure reducing valve body and the piston, so as to achieve sealing at any position, an upper limit is disposed on the tightening cap, a lower limit is disposed on the pressure reducing valve body, and the piston moves between the upper limit and the lower limit.

3. The novel pressure reducing valve according to claim 1, which comprises a first variant structure, wherein a compression block is arranged in the pressure reducing valve body, a second channel is arranged on the compression block and communicated with the air outlet channel, the pressure reducing valve body and the lower end of the valve rod are surrounded to form a buffer cavity, a first channel is arranged on the valve rod and communicated with the buffer cavity and the pressure stabilizing cavity.

4. The novel pressure reducing valve as claimed in claim 1, wherein the pressure reducing valve comprises a second variant structure, a return spring is arranged in the buffer cavity, and a plurality of springs such as a main spring and an auxiliary spring can be arranged between the tightening cap and the piston as required to meet the balance stress requirement of the piston.

5. The novel pressure reducing valve according to claim 1, comprising a third modified structure, wherein a high-pressure sealing element and a plug screw are arranged in a lower end hole of the pressure reducing valve body, and a check ring is arranged at the lower end of the high-pressure sealing element when the pressure in the high-pressure cavity is higher so as to meet the sealing requirement.

6. The novel pressure reducing valve according to claim 1, comprising a fourth modified structure, wherein the lower end of the valve rod bears the air pressure of the high-pressure cavity.

7. The novel pressure reducing valve according to claim 1, comprising a fifth modified structure, wherein a gas inlet joint, a pressure reducing valve core and a third channel are arranged on the pressure reducing valve body, a filter element is arranged between the gas inlet joint and the pressure reducing valve core, a throttling hole is arranged on the pressure reducing valve core, a gas inlet hole is arranged on the gas inlet joint, high-pressure gas enters from the gas inlet hole, after being filtered by the filter element, flows through the throttling hole for primary pressure reduction, the gas after primary pressure reduction is introduced into a high-pressure cavity, a flow gap between a valve rod shoulder and a sealing seat performs secondary pressure reduction on the gas, the gas after pressure reduction flows to the gas outlet channel, a plurality of pressure reducing valve cores can be arranged in the pressure reducing valve body according to requirements to realize multi-stage pressure reduction, a pressure limiting valve is arranged at the rear end of the third channel, and when the pressure in the pressure stabilizing cavity is greater than a set value, the gas is discharged from the pressure limiting valve channel, and the rear end of the gas outlet channel is provided with a stop valve which can close the gas outlet channel.

8. The novel pressure reducing valve as claimed in claim 1, wherein a connecting member and a sealing member are arranged between the piston and the valve rod to realize connection between the piston and the valve rod.

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