A gas distribution pipe

Abstract

The utility model discloses a kind of gas distribution pipe, including pipeline, one-way valve is equipped in pipeline, one-way valve includes the first valve body connected with pipeline, valve core is equipped in the first valve body, the second valve body is connected with the first valve body, spring is equipped between the second valve body and valve core, valve plate is equipped on the second valve body, through hole is equipped on valve plate, the side of valve plate away from valve core is equipped with flow guide structure, flow guide structure is tapered groove, tapered groove is communicated with through hole, the diameter of tapered groove gradually increases from the direction away from valve core, the limiting slot matched with the profile of valve core is equipped in the first valve body, buffer pad is equipped in limiting slot, valve core and buffer pad abut, sealing ring is equipped between the first valve body and the second valve body, by setting tapered flow guide groove on the side of valve plate away from valve core, gas can be smoothly diffused and decelerated after flowing through through hole, effectively reduce flow resistance, reduce turbulence and noise, improve gas conveying efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of gas pipe technology, and in particular relates to a gas distribution pipe. Background Technology

[0002] Gas pipes are specialized gas pipelines that use metal gas hoses instead of traditional snap-fit ​​rubber hoses. As a key component of the gas delivery system, the performance of gas distribution pipes directly affects the safety and stability of the gas supply. Currently, commonly available gas distribution pipes experience a decline in sealing performance after prolonged use, posing a risk of gas leakage. Additionally, they are prone to generating noise as gas flows through the valve body, and their high flow resistance affects delivery efficiency. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a gas distribution pipe with high sealing performance and smooth gas transmission.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A gas distribution pipe includes a pipe with a one-way valve inside. The one-way valve includes a first valve body connected to the pipe, a valve core inside the first valve body, a second valve body connected to the first valve body, and a spring between the second valve body and the valve core. The one-way flow of gas in the pipe is achieved by the movement of the valve core.

[0006] Furthermore, the second valve body is provided with a valve plate, which has a through hole. The valve plate has a flow guiding structure on the side facing away from the valve core. The flow guiding structure is a conical groove, which is connected to the through hole. The diameter of the conical groove gradually increases from the direction away from the valve core. After the gas flows through the through hole, it enters the conical groove, which slows down and diffuses, achieving a smooth transition of the gas and reducing flow resistance.

[0007] Furthermore, the first valve body is provided with a limiting groove that matches the contour of the valve core, and a buffer pad is provided in the limiting groove. The valve core abuts against the buffer pad to reduce the impact when the valve core closes.

[0008] Furthermore, a sealing ring is provided between the first valve body and the second valve body to seal the gas transmitted in the pipeline.

[0009] Furthermore, the sealing ring has a cavity, and a support body is provided inside the cavity. The two ends of the support body abut against the upper and lower inner walls of the cavity, respectively, to jointly suppress excessive deformation of the sealing ring in the radial and axial directions.

[0010] Furthermore, support columns are provided around the support body, and the support columns are connected to the inner wall of the cavity.

[0011] Furthermore, the two side walls of the sealing ring are provided with annular grooves along the circumference, and a sealing strip that can expand when heated is embedded in the annular groove.

[0012] Furthermore, both the valve plate and the valve core are equipped with fixed cylinders, and the two fixed cylinders are connected by a sliding pair. The spring is located in the mounting cavity formed by the two fixed cylinders.

[0013] Furthermore, the outer periphery of the second valve body is provided with anti-slip texture.

[0014] Furthermore, the inner wall of the fixed cylinder is provided with a lubricating coating, which is a polytetrafluoroethylene coating.

[0015] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0016] 1. In this utility model, by setting a conical guide groove on the side of the valve plate facing away from the valve core, the gas can diffuse and decelerate smoothly after flowing through the through hole, effectively reducing flow resistance, reducing turbulence and noise, and improving gas delivery efficiency.

[0017] 2. In this utility model, a buffer pad is set in the limiting groove, which can effectively absorb the impact energy when the valve core closes, reduce working noise, and extend the service life of the one-way valve.

[0018] 3. In this utility model, by setting a cavity and a support body inside the sealing ring, with the two ends of the support body abutting against the upper and lower inner walls of the cavity respectively, it can provide support force in both radial and axial directions, effectively preventing excessive deformation of the sealing ring and maintaining the stability of the sealing performance. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 This is a cross-sectional view of the structure of a gas distribution pipe according to this utility model;

[0021] Figure 2 for Figure 1 Enlarged schematic diagram of a local structure at point A;

[0022] Figure 3 for Figure 1 Enlarged schematic diagram of the local structure at point B.

[0023] In the diagram: 1-pipeline; 2-check valve; 3-first valve body; 4-valve core; 5-second valve body; 6-spring; 7-valve plate; 8-through hole; 9-conical groove; 10-limiting groove; 11-buffer pad; 12-sealing ring; 13-cavity; 14-support body; 15-support column; 16-annular groove; 17-sealing strip; 18-fixed cylinder; 19-anti-slip texture; 20-lubricating coating. Detailed Implementation

[0024] like Figures 1 to 3 As shown, this utility model provides a gas distribution pipe, which includes a pipe 1 and a one-way valve 2 installed inside the pipe 1.

[0025] The one-way valve 2 includes a first valve body 3 that is fixedly connected to the pipeline 1. The top inner wall of the first valve body 3 is provided with an internal thread, and the bottom outer side of the second valve body 5 is provided with an external thread. The first valve body 3 and the second valve body 5 are fixedly connected by the threads.

[0026] The first valve body 3 contains a valve core 4 that can move axially. A spring 6 is provided between the second valve body 5 and the valve core 4. When the pipeline 1 transports gas, the gas pressure in the pipeline 1 increases, which pushes the valve core 4 to move closer to the valve plate 7. The axial movement of the valve core 4 creates a gap between it and the first valve body 3, allowing the gas to flow in the pipeline 1. The movement of the valve core 4 compresses the spring 6, causing the spring 6 to deform. After the gas transmission is completed, the spring 6 returns to its original shape and pushes the valve core 4 back to its original position, sealing the pipeline 1 and thus realizing unidirectional gas transmission in the pipeline 1.

[0027] The second valve body 5 is provided with a circular valve plate 7, and the valve plate 7 is provided with several through holes 8. The diameter of the through holes 8 can be set according to the actual use, and the through holes 8 are evenly distributed in a ring shape.

[0028] The valve plate 7 has a flow guiding structure on the side facing away from the valve core 4. The flow guiding structure is a conical groove 9, which is connected to the through hole 8. The diameter of the conical groove 9 gradually increases from the direction away from the valve core 4. After the gas flows through the through hole 8, it enters the conical groove 9, which slows down and diffuses, achieving a smooth transition of the gas and effectively reducing the flow resistance.

[0029] The inner wall of the first valve body 3 is provided with a limiting groove 10. The bottom of the limiting groove 10 matches the outline of the valve core 4, and a buffer pad 11 is provided in the limiting groove 10. The buffer pad 11 is made of high temperature resistant silicone rubber material. The valve core 4 abuts against the buffer pad 11 to reduce the impact when the valve core 4 is closed.

[0030] A sealing ring 12 is provided between the first valve body 3 and the second valve body 5. The sealing ring 12 is made of fluororubber material and is used to seal the gas transmitted in the pipeline 1.

[0031] The cavity 13 and support 14 structure provided inside the sealing ring 12 provide radial and axial support forces by the support 14 abutting against the inner wall of the cavity 13 from above and below under pressure, effectively preventing the sealing ring 12 from being squeezed, deformed or twisted, and maintaining the integrity of the sealing surface and the sealing pressure.

[0032] The support columns 15 arranged around the support body 14, through their connection with the inner wall of the cavity 13, evenly distribute the local pressure to the entire sealing ring 12, thereby enhancing the structural stability of the sealing ring 12 and preventing permanent deformation caused by local stress concentration under high pressure.

[0033] The sealing ring 12 has heat-expandable sealing strips 17 embedded in the annular grooves 16 on both sides. The sealing strips 17 are made of thermally expandable graphite material. When the ambient temperature rises, they automatically expand, increasing the clamping force on the contact surface with the valve body and forming an adaptive seal. This effectively compensates for the decrease in sealing performance caused by material thermal aging or wear, and significantly improves the sealing reliability under high-temperature conditions.

[0034] Both valve plate 7 and valve core 4 are provided with fixed cylinders 18. The two fixed cylinders 18 are connected by a sliding pair with clearance fit to realize the relative sliding of the two fixed cylinders 18. The spring 6 is located in the mounting cavity surrounded by the two fixed cylinders 18.

[0035] Spring 6 is made of stainless steel.

[0036] The outer periphery of the second valve body 5 is provided with cross-shaped anti-slip texture 19, the depth of which is 0.5mm, to facilitate the application of force during assembly.

[0037] The inner wall of the fixed cylinder 18 is provided with a polytetrafluoroethylene lubricating coating 20 with a coating thickness of 0.1 mm to reduce sliding friction.

[0038] When the gas distribution pipe is working, gas flows in from the first valve body 3, pushing the valve core 4 to compress the spring 6 and open the flow channel. After the gas passes through the through hole 8 and the conical groove 9 on the valve plate 7, it achieves smooth diffusion. When the airflow reverses, the spring 6 pushes the valve core 4 back to its original position, contacting the buffer pad 11 to achieve a soft seal. The sealing ring 12 achieves bidirectional sealing under the action of air pressure, ensuring the unidirectional flow characteristics of the gas.

[0039] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A gas distribution pipe, comprising a pipe, wherein a one-way valve is provided within the pipe, characterized in that: The one-way valve includes a first valve body connected to a pipeline, a valve core inside the first valve body, a second valve body connected to the first valve body, and a spring between the second valve body and the valve core. The movement of the valve core enables one-way flow of gas in the pipeline.

2. A gas distribution pipe according to claim 1, characterized in that: The second valve body is provided with a valve plate, which has a through hole. The valve plate has a flow guiding structure on the side facing away from the valve core. The flow guiding structure is a conical groove, which is connected to the through hole. The diameter of the conical groove gradually increases from the direction away from the valve core. After the gas flows through the through hole, it enters the conical groove, which slows down and diffuses, so as to achieve a smooth transition of the gas and reduce the flow resistance.

3. A gas distribution pipe according to claim 1, characterized in that: The first valve body is provided with a limiting groove that matches the contour of the valve core. A buffer pad is provided in the limiting groove. The valve core abuts against the buffer pad to reduce the impact when the valve core closes.

4. A gas distribution pipe according to claim 1, characterized in that: A sealing ring is provided between the first valve body and the second valve body to seal the gas transmitted in the pipeline.

5. A gas distribution pipe according to claim 4, characterized in that: The sealing ring has a cavity, and a support body is provided in the cavity. The two ends of the support body abut against the upper and lower inner walls of the cavity, respectively, to jointly suppress excessive deformation of the sealing ring in the radial and axial directions.

6. A gas distribution pipe according to claim 5, characterized in that: The support body is provided with support columns on its periphery, and the support columns are connected to the inner wall of the cavity.

7. A gas distribution pipe according to claim 5, characterized in that: The sealing ring has annular grooves along its two side walls in the circumferential direction, and a sealing strip that can expand when heated is embedded in the annular groove.

8. A gas distribution pipe according to claim 2, characterized in that: Both the valve plate and the valve core are provided with fixed cylinders, and the two fixed cylinders are connected by a sliding pair. The spring is located in the mounting cavity formed by the two fixed cylinders.

9. A gas distribution pipe according to claim 1, characterized in that: The outer periphery of the second valve body is provided with anti-slip texture.

10. A gas distribution pipe according to claim 8, characterized in that: The inner wall of the fixed cylinder is provided with a lubricating coating.

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