Back pressure valve on gas-liquid mixing pipeline

Abstract

This application relates to the field of fluid chemistry technology, and more particularly to a back pressure valve in a gas-liquid mixing pipeline, comprising: a base, an upper pressure cap, and a back pressure diaphragm; a buffer protrusion is formed on the upper surface of the base, and a snap-fit ​​groove is provided around the periphery of the buffer protrusion; an inlet port and an outlet port are respectively provided on the side of the base; a buffer recess is formed on the lower surface of the upper pressure cap, which is adapted to the buffer protrusion; a buffer space is formed at the engagement position of the buffer protrusion and the buffer recess; a snap-fit ​​protrusion is formed around the periphery of the buffer recess, which is adapted to the snap-fit ​​groove; the back pressure diaphragm is disposed between the base and the upper pressure cap, and the edge of the back pressure diaphragm is located within the snap-fit ​​groove. The back pressure valve in the gas-liquid mixing pipeline proposed in this application is miniaturized, has high control precision, and can effectively avoid the deposition of powdery solids.

Description

Technical Field

[0001] This application relates to the field of fluid chemistry technology, and in particular to back pressure valves in gas-liquid mixing pipelines. Background Technology

[0002] Fluid chemistry mainly studies chemical reactions, mass transport, and related physicochemical phenomena in fluids (including liquids, gases, and powdered solids). It involves knowledge from multiple disciplines such as chemical engineering, physical chemistry, and materials science. Through precise control and operation of fluid systems, it enables efficient chemical reactions, separation and purification of substances, and preparation of new materials.

[0003] In fluid chemistry research, reaction conditions are typically high temperature and high pressure to increase the reaction rate. Back pressure valves are usually used to ensure precise control of the reactant supply. However, in the mixing and transport of gas-liquid mixtures, which may be formed after a pre-reaction with a solid, powdery solid deposits often occur during transport. Furthermore, existing back pressure valves are usually large-scale, lacking sufficient control precision, and are unsuitable for the field of fluid chemistry. Utility Model Content

[0004] In view of this, the purpose of this application is to propose a back pressure valve for a gas-liquid mixing pipeline to solve the technical problem that the back pressure valve in the prior art is not suitable for the field of fluid chemistry.

[0005] To achieve the above objectives, this application proposes a back pressure valve for a gas-liquid mixing pipeline, comprising:

[0006] Base, upper pressure cover, and back pressure diaphragm;

[0007] The upper surface of the base has a buffer protrusion, and a snap-fit ​​groove is provided around the periphery of the buffer protrusion. The sides of the base are respectively provided with a feeding port and a discharging port. The interior of the base is provided with a feeding pipe and a discharging pipe. The feeding port and the feeding pipe are connected, and the discharging port and the discharging pipe are connected. The feeding pipe extends to the upper surface of the buffer protrusion through a first discharging port, and the discharging pipe extends to the upper surface of the buffer protrusion through a second discharging port.

[0008] The lower surface of the upper cover has a buffer recess that matches the buffer protrusion. A buffer space is formed at the snap-fit ​​position of the buffer protrusion and the buffer recess. A snap-fit ​​protrusion that matches the snap-fit ​​groove is formed around the buffer recess. A back pressure air source interface is provided on the side of the upper cover. A back pressure air source pipe is provided inside the upper cover. The back pressure air source interface and the back pressure air source pipe are connected. The back pressure air source pipe is connected to the buffer space through an air outlet.

[0009] The back pressure diaphragm is disposed between the base and the upper pressure cover, and the edge of the back pressure diaphragm is located within the snap-fit ​​groove.

[0010] In some embodiments, the back pressure diaphragm is made of one of FFKM, PFA, PEEK, PEP, PTFE, FMA or stainless steel.

[0011] In some embodiments, the edge of the back pressure diaphragm is recessed to form a concave space that is adapted to the buffer protrusion.

[0012] In some embodiments, there are multiple first discharge ports and multiple second discharge ports, and the number of second discharge ports is greater than the number of first discharge ports.

[0013] In some embodiments, the diameter of the feed inlet is larger than the inner diameter of the feed pipe.

[0014] In some embodiments, the angle between the feed pipe and the first discharge port ranges from 60 to 120 degrees.

[0015] In some embodiments, the angle between the feed pipe and the first discharge port is 90 degrees.

[0016] In some embodiments, a buffer pad is provided at one end of the first discharge port near the buffer space.

[0017] In some embodiments, the cushioning pad is a cotton pad.

[0018] In some embodiments, a gasket mounting groove is provided on the upper surface of the base at a position corresponding to the first discharge port, and the buffer gasket is disposed in the gasket mounting groove.

[0019] The back pressure valve on the gas-liquid mixing pipeline provided in the application embodiment has a back pressure diaphragm that is resistant to high temperature and high pressure, and has a small overall size, which can meet the needs of the fluid chemistry field. Through the tight fastening of the base and the upper pressure cover, it can meet the high pressure resistance requirements of the fluid chemistry field. Through the precise cooperation of the base, the upper pressure cover and the back pressure diaphragm, it can meet the sealing requirements under high pressure conditions. At the same time, through the design of the feed interface and the first discharge port, the deposition of powdery solids can be effectively avoided while ensuring control accuracy. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the back pressure valve in the embodiments of this application;

[0022] Figure 2 This is an exploded view of the back pressure valve in the embodiments of this application;

[0023] Figure 3 This is a cross-sectional view of the back pressure valve in the embodiments of this application. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 The diagram shown is a schematic diagram of the overall structure of the back pressure valve in the embodiment of this application. Figure 2 This is an exploded view of the back pressure valve in the embodiments of this application; Figure 3 This is a cross-sectional view of the back pressure valve in the embodiments of this application.

[0027] from Figure 1 , Figure 2 and Figure 3 As can be seen from the above, the back pressure valve in this embodiment includes:

[0028] The base 1 comprises a base, an upper pressure cover 2, and a back pressure diaphragm 3. A buffer protrusion 15 is formed on the upper surface of the base 1, and a snap-fit ​​groove 14 is provided around the periphery of the buffer protrusion 15. An inlet port 4 and an outlet port 5 are respectively provided on the sides of the base 1. An inlet pipe 7 and an outlet pipe 8 are provided inside the base 1. The inlet port 4 and the inlet pipe 7 are connected, and the outlet port 5 and the outlet pipe 8 are connected. The inlet pipe 7 extends to the upper surface of the buffer protrusion 15 through a first outlet port 9, and the outlet pipe 8 extends to the upper surface of the buffer protrusion 15 through a second outlet port 10.

[0029] The lower surface of the upper cover 2 has a buffer recess that matches the buffer protrusion 15. A buffer space 11 is formed at the snap-fit ​​position of the buffer protrusion 15 and the buffer recess. A snap-fit ​​protrusion 12 that matches the snap-fit ​​groove 14 is formed around the buffer recess. A back pressure air source interface 6 is provided on the side of the upper cover 2. A back pressure air source pipe 13 is provided inside the upper cover 2. The back pressure air source interface 6 and the back pressure air source pipe 13 are connected. The back pressure air source pipe 13 is connected to the buffer space 11 through an air outlet.

[0030] The back pressure diaphragm 3 is disposed between the base 1 and the upper pressure cover 2, and the edge of the back pressure diaphragm 3 is located in the snap-fit ​​groove 14.

[0031] In this embodiment, the buffer recess can be a spherical structure, and the buffer space formed by the snapping of the buffer protrusion 15 and the buffer recess can be a spatial structure with one side being a plane and the other side being a sphere.

[0032] The back pressure valve of this embodiment connects to a back pressure air source via a back pressure air source interface, applying air pressure to the buffer space. Specifically, air pressure is applied to the upper surface of the back pressure diaphragm, and the applied air pressure is the same as the pressure of the connected back pressure air source. The high-pressure gas-liquid mixture enters the feed pipe from the base's feed interface, enters the buffer space through the first discharge port (specifically, the buffer space below the back pressure diaphragm), and then flows out through the second discharge port, discharge pipe, and discharge interface. The edge of the back pressure diaphragm is positioned within the base's snap-fit ​​groove and is pressed tightly by the snap-fit ​​protrusion of the upper cover, ensuring airtightness; the back pressure diaphragm itself is airtight. Thus, by changing the pressure of the back pressure air source and its connection state, the flow rate and flow state of the gas-liquid mixture can be adjusted, ensuring thorough mixing within the buffer space. Simultaneously, the high-speed flow of the gas-liquid mixture effectively prevents the deposition of powdery or granular solids.

[0033] The back pressure valve on the gas-liquid mixing pipeline provided in the application embodiment has a back pressure diaphragm that is resistant to high temperature and high pressure, and has a small overall size, which can meet the needs of the fluid chemistry field. Through the tight fastening of the base and the upper pressure cover, it can meet the high pressure resistance requirements of the fluid chemistry field. Through the precise cooperation of the base, the upper pressure cover and the back pressure diaphragm, it can meet the sealing requirements under high pressure conditions. At the same time, through the design of the feed interface and the first discharge port, the deposition of powdery solids can be effectively avoided while ensuring control accuracy.

[0034] As an optional embodiment of this application, in the above embodiment, the back pressure diaphragm is made of one of FFKM, PFA, PEEK, PEP, PTFE, FMA or stainless steel, which has excellent temperature resistance and chemical stability, and can adapt to high pressure while avoiding reaction with gas-liquid mixtures.

[0035] To enhance the airtightness and durability of the back pressure valve, the edge of the back pressure diaphragm is recessed to form a concave space that matches the buffer protrusion. This prevents the back pressure diaphragm from deforming under the pressure from the base and the upper cover, and from rupturing under the impact of the high-pressure gas-liquid mixture.

[0036] In addition, in order to reduce the impact of the high-pressure gas-liquid mixture on the back pressure diaphragm, the number of the first discharge port is set to be multiple, and the number of the second discharge port is also set to be multiple, with the number of the second discharge port being greater than the number of the first discharge port. In this way, under the same pressure, the high-pressure gas-liquid mixture will not stay in the buffer space for too long and will be quickly discharged from the second discharge port.

[0037] To avoid the deposition of powdery solids due to the slowdown in the flow rate of the high-pressure gas-liquid mixture, the aperture of the feed inlet is larger than the inner diameter of the feed pipe, so that under the same pressure, the flow rate of the gas-liquid mixture in the feed pipe is greater than the flow rate in the feed inlet.

[0038] To prevent the high-pressure gas-liquid mixture from directly impacting the back pressure diaphragm and causing it to puncture, the angle between the feed pipe and the first outlet is between 60 and 120 degrees. This angle buffers the high-pressure gas-liquid mixture, allowing it to pass through the feed pipe at a uniform speed. Preferably, the angle between the feed pipe and the first outlet is 90 degrees.

[0039] To further prevent the high-pressure gas-liquid mixture from directly impacting the back pressure diaphragm, a buffer pad is provided at the end of the first outlet near the buffer space. The buffer pad is either a cotton pad or a ceramic pad. In addition to its filtering function, the buffer pad also disperses pressure, preventing pressure-induced cutting damage at the contact points between the back pressure diaphragm and the edges of the inlet and outlet. Furthermore, a pad mounting groove is provided on the upper surface of the base corresponding to the first outlet, and the buffer pad is positioned within this groove.

[0040] The back pressure valve on the gas-liquid mixing pipeline provided in the application embodiment has a back pressure diaphragm that is resistant to high temperature and high pressure, and has a small overall size, which can meet the needs of the fluid chemistry field. Through the tight fastening of the base and the upper pressure cover, it can meet the high pressure resistance requirements of the fluid chemistry field. Through the precise cooperation of the base, the upper pressure cover and the back pressure diaphragm, it can meet the sealing requirements under high pressure conditions. At the same time, through the design of the feed interface and the first discharge port, the deposition of powdery solids can be effectively avoided while ensuring control accuracy.

[0041] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described utility model concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A back pressure valve on a gas-liquid mixing pipeline, characterized in that, include: Base, upper pressure cover, and back pressure diaphragm; The upper surface of the base has a buffer protrusion, and a snap-fit ​​groove is provided around the periphery of the buffer protrusion. The sides of the base are respectively provided with a feeding port and a discharging port. The interior of the base is provided with a feeding pipe and a discharging pipe. The feeding port and the feeding pipe are connected, and the discharging port and the discharging pipe are connected. The feeding pipe extends to the upper surface of the buffer protrusion through a first discharging port, and the discharging pipe extends to the upper surface of the buffer protrusion through a second discharging port. The lower surface of the upper cover has a buffer recess that matches the buffer protrusion. A buffer space is formed at the snap-fit ​​position of the buffer protrusion and the buffer recess. A snap-fit ​​protrusion that matches the snap-fit ​​groove is formed around the buffer recess. A back pressure air source interface is provided on the side of the upper cover. A back pressure air source pipe is provided inside the upper cover. The back pressure air source interface and the back pressure air source pipe are connected. The back pressure air source pipe is connected to the buffer space through an air outlet. The back pressure diaphragm is disposed between the base and the upper pressure cover, and the edge of the back pressure diaphragm is located within the snap-fit ​​groove.

2. The back pressure valve according to claim 1, characterized in that, The back pressure diaphragm is made of one of the following materials: FFKM, PFA, PEEK, PEP, PTFE, FMA, or stainless steel.

3. The back pressure valve according to claim 1, characterized in that, The edge of the back pressure diaphragm is recessed to form a concave space, which is adapted to the buffer protrusion.

4. The back pressure valve according to claim 1, characterized in that, There are multiple first discharge ports and multiple second discharge ports, and the number of second discharge ports is greater than the number of first discharge ports.

5. The back pressure valve according to claim 1, characterized in that, The diameter of the feed inlet is larger than the inner diameter of the feed pipe.

6. The back pressure valve according to claim 5, characterized in that, The angle between the feed pipe and the first discharge port ranges from 60 to 120 degrees.

7. The back pressure valve according to claim 6, characterized in that, The angle between the feed pipe and the first discharge port is 90 degrees.

8. The back pressure valve according to any one of claims 1 to 7, characterized in that, A buffer pad is provided at one end of the first discharge port near the buffer space.

9. The back pressure valve according to claim 8, characterized in that, The cushioning pad is a cotton pad.

10. The back pressure valve according to claim 8, characterized in that, A gasket mounting groove is provided on the upper surface of the base at the position corresponding to the first discharge port, and the buffer gasket is disposed in the gasket mounting groove.

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