Large-flow pressure reducing valve structure
By setting up a low-pressure gas buffer chamber and multiple flow channels inside the pressure reducing valve, the problem of insufficient flow in existing pressure reducing valves is solved, and smooth gas flow and increased flow are achieved within the pressure reducing valve.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI USUI ENGINE PARTS
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-15
AI Technical Summary
In existing pressure reducing valve structures, the flow of low-pressure gas is poor, resulting in insufficient flow and failure to achieve the required flow rate.
The pressure reducing valve is equipped with a low-pressure gas buffer chamber and multiple flow channels to increase the flow cross-sectional area. These include a front low-pressure gas buffer chamber, a front flow channel, a rear flow channel, and an outlet channel. Gas flow is achieved through a pressure reducing and regulating system composed of a sealing gasket, a front sealing ring, a rear sealing ring, and a spring.
It significantly improves the flow and volume of low-pressure gas within a limited space, ensuring smooth gas flow and increasing the flow rate at the outlet of the pressure reducing valve.
Smart Images
Figure CN224245491U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure reducing valve technology, specifically, to a structure for a large flow pressure reducing valve. Background Technology
[0002] In a pressure reducing valve, high-pressure gas rapidly decreases in pressure to become low-pressure gas after passing through the throttling position. Due to the limitations of the pressure reducing valve's external dimensions and internal structure, the flow channel for low-pressure gas inside the valve is often quite narrow. Furthermore, in existing pressure reducing valve structures, only one low-pressure gas flow channel is provided at the front or rear end of the pressure reducing and regulating system, leading to a limitation on the flow of low-pressure gas inside the pressure reducing valve and causing the pressure reducing valve outlet to fail to reach the required flow rate.
[0003] Therefore, a structure is needed to maximize the cross-sectional area of low-pressure gas flow within the limited internal space of the pressure reducing valve, thereby improving the flowability of low-pressure gas and increasing the flow rate at the outlet of the pressure reducing valve. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a high-flow pressure reducing valve structure.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] A high-flow pressure reducing valve structure includes a valve body; a pressure reducing and regulating system is integrally embedded in the valve body cavity, and a plug seals the pressure reducing and regulating system in the valve body cavity, and the plug seals the valve body with a sealing ring;
[0007] The sealing gasket of the pressure reducing and regulating system is opposite to the valve seat on the valve body.
[0008] The first plug and the second plug are used to seal the through holes in the valve body generated during the pre-processing flow channel and the post-processing flow channel, respectively.
[0009] The pressure reducing and regulating system includes a sealing gasket, a front sealing ring, a valve core, a spring, and a rear sealing ring. The sealing gasket is embedded in the groove on the end face of the valve core, and the front and rear sealing rings are respectively set in the front annular groove and the rear annular groove in the middle of the valve core. The spring is nested around the valve stem of the valve core, with one end face tightly attached to the valve core flange. Its inner wall diameter is larger than the outer diameter of the front sealing ring to ensure that the two do not interfere with each other.
[0010] The valve core includes a valve stem with a relatively small diameter and a flange with a relatively large diameter. An end face groove is provided on one end face of the valve stem, and two intersecting radial through grooves are opened on the end face of the flange with a relatively large diameter.
[0011] The valve stem and flange of the valve core are respectively provided with a front annular groove and a rear annular groove. There are two intersecting radial through holes between the end face groove and the front annular groove. These two radial through holes are connected to the radial through groove on the end face of the valve core flange through a connecting hole.
[0012] The sealing gasket, front sealing ring, valve core, spring, and rear sealing ring are connected in the above-mentioned manner to form a pressure reducing and regulating system.
[0013] A front low-pressure gas buffer chamber is provided at the front end of the pressure reducing and regulating system, and a rear low-pressure gas buffer chamber is formed between the rear end of the pressure reducing and regulating system and the plug and valve body; the front low-pressure gas buffer chamber and the rear low-pressure gas buffer chamber are connected to the outlet channel through the front flow channel and the rear flow channel, respectively.
[0014] The cross-sectional area of the annular gap between the front low-pressure gas buffer chamber and the valve core is greater than the sum of the cross-sectional areas of the front flow channel and the rear flow channel.
[0015] The cross-sectional area of the flow channel shall not be less than the cross-sectional area of the gas flow in the pressure reducing and regulating system.
[0016] The cross-sectional area of the outlet channel shall not be less than the sum of the cross-sectional areas of the front and rear circulation channels.
[0017] Compared with the prior art, the positive effects of this utility model are:
[0018] This application sets low-pressure gas flow channels to the outlet at both the front and rear ends of the pressure reducing and regulating system, and sets a low-pressure gas buffer chamber at the front end of the pressure reducing and regulating system. This greatly increases the flowability of low-pressure gas inside the pressure reducing valve. Given the limited space inside the pressure reducing valve, this structure maximizes the flow cross-sectional area, making the flow of the medium inside the pressure reducing valve smoother and increasing the flow rate at the outlet of the pressure reducing valve. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the internal structure and gas flow direction of a high-flow-rate pressure reducing valve. Detailed Implementation
[0020] The following provides a specific embodiment of the structure of a high-flow pressure reducing valve according to this utility model.
[0021] Example 1
[0022] like Figure 1A high-flow pressure reducing valve structure includes a valve body 1, a pressure reducing regulating system 2, a plug sealing ring 3, and a plug 4. The pressure reducing regulating system 2 is integrally embedded within the cavity of the valve body 1. The plug 4 seals the pressure reducing regulating system 2 within the cavity of the valve body 1, and the plug sealing ring 3 achieves a seal between the plug 4 and the valve body 1. The sealing gasket 2.1 of the pressure reducing regulating system is opposite to the valve seat 1.2 on the valve body. A first plug 5 and a second plug 6 are used to seal the through holes created in the valve body 1 during the processing of the post-processing flow channel 1.6 and the pre-processing flow channel 1.4, respectively. Specifically: High-pressure gas enters the valve body 1 through the inlet 1.1, passes through the throttling position between the sealing gasket 2.1 and the valve seat 1.2 of the pressure reducing and regulating system 2, and enters the front low-pressure gas buffer chamber 1.3. The cross-sectional area of the annular gap between the front low-pressure gas buffer chamber 1.3 and the valve core 2.3 is larger than the sum of the cross-sectional areas of the front flow channel 1.4 and the rear flow channel 1.6. After entering the front low-pressure gas buffer chamber 1.3, the gas pressure rapidly decreases to low-pressure gas, and then splits into two paths that enter the outlet channel 1.7 respectively. The gas flow direction is as follows: one path passes through the front flow channel 1.4 and enters the outlet channel 1.7; the other path passes through the pressure reducing and regulating system 2 and enters the rear low-pressure gas buffer chamber 1.5, then passes through the rear flow channel 1.6 and enters the outlet channel 1.7. The cross-sectional area of the rear flow channel 1.6 is not less than the gas flow cross-sectional area of the pressure reducing and regulating system 2, and the cross-sectional area of the outlet channel 1.7 is not less than the sum of the cross-sectional areas of the front flow channel 1.4 and the rear flow channel 1.6. The low-pressure gas is collected in the outlet channel 1.7 and flows out of the pressure reducing valve from the outlet 1.8. Because this utility model adds a low-pressure gas flow channel, it increases the internal low-pressure gas flow cross-sectional area.
[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A high-flow-rate pressure reducing valve structure, comprising a valve body (1); characterized in that, The pressure reducing and regulating system (2) is embedded in the cavity of the valve body (1). The plug (4) seals the pressure reducing and regulating system (2) in the cavity of the valve body (1) and achieves the seal between the plug (4) and the valve body (1) through the plug sealing ring (3).
2. The structure of a high-flow-rate pressure reducing valve as described in claim 1, characterized in that, The sealing gasket (2.1) of the pressure reducing and regulating system is opposite to the valve seat (1.2) on the valve body.
3. The structure of a high-flow-rate pressure reducing valve as described in claim 1, characterized in that, The first plug (5) and the second plug (6) are used to seal the through holes generated in the valve body (1) when the pre-processing flow channel (1.4) and the post-processing flow channel (1.6) are respectively.
4. The structure of a high-flow-rate pressure reducing valve as described in claim 1, characterized in that, The pressure reducing and regulating system (2) includes a sealing gasket (2.1), a front sealing ring (2.2), a valve core (2.3), a spring (2.4), and a rear sealing ring (2.5). The sealing gasket (2.1) is embedded in the groove on the end face of the valve core (2.3). The front sealing ring (2.2) and the rear sealing ring (2.5) are respectively set in the front annular groove and the rear annular groove in the middle of the valve core (2.3). The spring (2.4) is nested around the valve stem of the valve core (2.3), with one end face closely attached to the flange of the valve core (2.3). Its inner wall diameter is larger than that of the front sealing ring (2.2) to ensure that the two do not interfere with each other.
5. The structure of a high-flow-rate pressure reducing valve as described in claim 4, characterized in that, The valve core (2.3) includes a valve stem with a relatively small diameter and a flange with a relatively large diameter. An end face groove is provided on one end face of the valve stem, and two intersecting radial through grooves are opened on the end face of the flange with a relatively large diameter.
6. The structure of a high-flow-rate pressure reducing valve as described in claim 4, characterized in that, The valve stem and flange of the valve core (2.3) are respectively provided with a front annular groove and a rear annular groove. There are two intersecting radial through holes between the end face groove and the front annular groove. The two radial through holes are connected to the radial through groove on the end face of the flange of the valve core (2.3) through the connecting hole.
7. The structure of a high-flow-rate pressure reducing valve as described in claim 1, characterized in that, A front low-pressure gas buffer chamber (1.3) is provided at the front end of the pressure reducing and regulating system (2), and a rear low-pressure gas buffer chamber (1.5) is formed between the rear end of the pressure reducing and regulating system (2) and the plug (4) and valve body (1); the front low-pressure gas buffer chamber (1.3) and the rear low-pressure gas buffer chamber (1.5) are connected to the outlet channel (1.7) through the front flow channel (1.4) and the rear flow channel (1.6) respectively.
8. The structure of a high-flow-rate pressure reducing valve as described in claim 7, characterized in that, The cross-sectional area of the annular gap between the front low-pressure gas buffer chamber (1.3) and the valve core (2.3) is greater than the sum of the cross-sectional areas of the front flow channel (1.4) and the rear flow channel (1.6).
9. The structure of a high-flow-rate pressure reducing valve as described in claim 7, characterized in that, The cross-sectional area of the outlet channel (1.7) shall not be less than the sum of the cross-sectional areas of the front circulation channel (1.4) and the rear circulation channel (1.6).
10. The structure of a high-flow-rate pressure reducing valve as described in claim 1, characterized in that, The cross-sectional area of the rear flow channel (1.6) shall not be less than the cross-sectional area of the gas flow of the pressure reducing and regulating system (2).