Device for separating gas from liquid

Abstract

The present invention belongs to the technical field of pipe fittings. A device for separating gas from liquid. The device comprises a housing (1), which is provided with a gas exhaust chamber (1a) and a separation chamber (1b). A liquid intake nozzle (1b1) and a liquid output nozzle (1b2) are respectively arranged at an upper end and a lower end of the separation chamber (1b); a central cylinder (2) and a blocking member (4) located below the central cylinder (2) are fixed in the separation chamber (1b); and the separation chamber (1b) is in communication with the gas exhaust chamber (1a) by means of the central cylinder (2); a plurality of spiral pieces (3) spirally arranged in the vertical direction are fixed between the housing (1) and the central cylinder (2), the plurality of spiral pieces (3) are arranged at intervals to form the same number of flow passing channels (3a) as the spiral pieces (3), outlets (3b) of the flow passing channels (3a) are located at a lower end of the central cylinder (2), and the outlets of the flow passing channels (3a) are approximately uniformly distributed in the circumferential direction of the central cylinder (2); and a downward recessed cavity (4a1) is formed on an upper surface of the blocking member (4), and the recessed cavity (4a1) directly faces the central cylinder (2).

Description

A device for separating gas from liquid Technical Field

[0001] The invention belongs to the technical field of pipeline accessories and relates to a device for separating gas from liquid. Background Art

[0002] In a water heating system, hot water is transported through pipes, and gases are mixed in the water. These gases can affect the safety of the water heating system and generate noise, so the excess gases need to be discharged. Generally, an exhaust valve is installed in the water heating pipe, but ordinary exhaust valves cannot separate the gases in the water and have certain limitations.

[0003] Therefore, a gas separation device is designed based on the existing exhaust valve, such as a gas separator disclosed in the patent document with the publication number FR7012589, which sets the inlet eccentrically and inputs tangentially, and the outlet is located below the inlet, so that the water flow forms a vortex and uses centrifugal force to separate the gas from the water, and then discharges the gas through an automatic exhaust valve. Or a gas separator disclosed in the patent document with the publication number WO2023 / 218350A1 also sets the inlet eccentrically and inputs tangentially. However, these eccentrically tangentially set inlets will cause the liquid to be in an uneven force state in the circumferential direction when forming a vortex in the shell. When the gas gathers at the center of the vortex, it does not converge into a straight shape, but into a twisted shape, that is, the rotation center of the vortex is not in a straight line in the axial direction, resulting in a significant reduction in the centrifugal effect and a poor gas separation effect.

[0004] To improve gas separation, a common approach is to increase the number of gas separators, connecting them in series to maximize gas removal and ensure safe use of plumbing pipes. However, this increases pipe installation costs and space. Alternatively, multiple inlets can be installed on the housing, which complicates pipe connections. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose a device for separating gas from liquid, thereby solving the technical problem of poor gas separation effect in the existing separation devices.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A device for separating gas from liquid, comprising a shell, wherein the upper and lower parts of the shell respectively have an exhaust chamber and a separation chamber, an exhaust assembly is installed on the exhaust chamber, and the upper and lower ends of the separation chamber are respectively provided with a liquid inlet pipe and a liquid outlet pipe, a central cylinder and a blocking member located below the central cylinder are fixed in the separation chamber, and the separation chamber and the exhaust chamber are communicated through the central cylinder, and is characterized in that a plurality of spiral blades spirally arranged along the up and down directions are fixed between the shell and the central cylinder, and the plurality of spiral blades are alternately arranged to form a flow channel with the same number of spiral blades, the outlet of the flow channel is located at the outer side of the lower end of the central cylinder, and the outlet of the flow channel is roughly evenly distributed along the circumference of the central cylinder, and the upper surface of the blocking member has a downwardly concave cavity, and the concave cavity is opposite to the central cylinder.

[0008] Liquid containing gas enters the separation chamber from the liquid inlet pipe. The liquid is then divided by the spiral blades into several streams of liquid and spirals downward along the flow channel between the central cylinder and the shell, generating tangential centrifugal force during the spiral movement. Since the outlet of the flow channel is at the lower end of the central cylinder and is roughly evenly distributed along the circumference of the central cylinder, the several streams of liquid divided by the spiral blades can spiral out from the outlet of the flow channel in a roughly even manner. The several streams of liquid that have spiraled out are then combined into a whole. This whole liquid is in a vortex state and is subjected to uniform force in the circumferential direction, so that the rotation center of the vortex is in a straight line in the axial direction, thereby causing the gas to converge in a straight line at the center of the vortex. The gas rises into the inner cavity of the central cylinder and then enters the exhaust chamber, and is finally discharged from the shell through the exhaust assembly. Before entering the liquid outlet pipe, the swirling liquid first contacts the barrier. Because the barrier is provided with a concave cavity facing the central cylinder, the swirling liquid is cut by the sidewall of the barrier into peripheral liquid located outside the barrier and concave liquid located within the concave cavity of the barrier. The peripheral liquid, which has a strong centrifugal force and good degassing effect, flows out of the liquid outlet pipe, while the concave liquid continues to swirl within the concave cavity of the barrier, causing the gas in the concave liquid to continue to escape, thereby fully separating the gas from the liquid. Therefore, this separation device can improve the gas separation effect.

[0009] In the above-mentioned device for separating gas from liquid, the central cylinder is in a conical shape that is smaller at the top and larger at the bottom, and the side wall of the separation chamber is in a straight cylindrical shape.

[0010] This arrangement causes the gap between the outer surface of the central cylinder and the sidewall of the separation chamber to gradually decrease from top to bottom. Specifically, the cross-sectional area of ​​the flow channel decreases from top to bottom, while the inner hole of the central cylinder decreases from bottom to top. As the water flows downward along the spiral blades, the cross-sectional area of ​​the flow channel gradually decreases, increasing the water velocity. This creates a greater centrifugal force when the water flows out of the outlet of the flow channel, facilitating the separation of gas from the liquid and its linear accumulation directly below the central cylinder, thereby improving the gas separation effect. When the gas separates from the liquid, it forms bubbles. The inner hole of the central cylinder gradually decreases from bottom to top, causing the inner surface of the central cylinder to converge and gather as the bubbles rise, allowing them to collide more effectively to form larger bubbles. These larger bubbles can then quickly rise into the exhaust chamber, improving exhaust efficiency. Furthermore, the larger lower diameter of the central cylinder expands the range for bubble accumulation and concentration, preventing them from escaping outside the central cylinder.

[0011] In the aforementioned device for separating gas from liquid, a protruding annular baffle ring is provided on the inner side surface of the upper portion of the central cylinder. The baffle ring has a central hole through which gas passes before entering the exhaust chamber. The baffle ring facilitates further collision of bubbles, allowing gas to quickly pass through the central hole.

[0012] In the above-mentioned device for separating gas from liquid, the lower ends of all spirals are flush with the lower end of the central cylinder, so that the gas that escapes from the flow channel can directly enter the central cylinder when flowing out of the spirals, allowing the gas to be discharged as quickly as possible.

[0013] In the above-mentioned device for separating gas from liquid, the liquid outlet pipe is located on the bottom wall of the separation chamber, the bottom surface of the concave cavity is flat, the side surface of the concave cavity is arc-shaped, and the edge of the concave cavity is provided with a straight cylindrical convex ring, and a water-passing gap is provided between the convex ring and the side wall of the separation chamber. The lower surface of the blocking member has a connecting tube inserted in the liquid outlet pipe, and the upper end of the connecting tube extends out of the liquid outlet pipe and is provided with a through hole.

[0014] Gas separated within the barrier cavity is prevented from entering the liquid outlet pipe along with the liquid by the barrier, and the raised ring provides further blocking action. The flat bottom and curved sides of the cavity allow the liquid to continue swirling within it while maintaining a barrier effect against gas. The water-passing gap and through-hole ensure that the degassed liquid flows smoothly out of the housing.

[0015] In the above-mentioned device for separating gas from liquid, the liquid outlet pipe is arranged on the side wall of the lower end of the separation chamber, the bottom surface of the concave cavity is a concave spherical surface, the lower part of the side surface of the concave cavity is a cylindrical surface, the upper part of the side surface of the concave cavity is a conical surface, the upper edge of the blocking member is higher than the inner hole of the liquid outlet pipe, and there is a water gap between the blocking member and the side wall of the separation chamber. The gas separated in the concave cavity of the blocking member is blocked by the blocking member and will not enter the liquid outlet pipe with the liquid. The bottom surface of the concave cavity is a concave spherical surface, the lower part of the side surface of the concave cavity is a cylindrical surface, and the upper part of the side surface of the concave cavity is a conical surface, which can make the liquid continue to vortex in the concave cavity and ensure the blocking effect on the gas. The water gap ensures that the degassed liquid flows out of the shell smoothly.

[0016] In the above-mentioned device for separating gas from liquid, a fixing ring is provided on the outer side of the lower end of the blocking member, and the fixing ring is fixedly connected to the housing. The blocking member is fixed to the housing via the fixing ring, and the connection is convenient.

[0017] In the aforementioned device for separating gas from liquid, the outer walls of the spiral blades are in contact with or slightly spaced from the walls of the separation chamber, while the inner walls of the spiral blades are fixed to the central cylinder. This allows for the separation of liquids within the flow channel, ensuring that all liquid flows out of the flow channel after the spiral rotation of the spiral blades, thereby improving the gas separation effect. The slight gap between the outer walls of the spiral blades and the walls of the separation chamber facilitates the installation of the spiral blades.

[0018] In the aforementioned device for separating gas from liquid, the liquid inlet pipe corresponds to the upper end of the central cylinder and is arranged radially along the central cylinder. This radial arrangement of the liquid inlet pipe reduces uneven force on the liquid at the upper end of the central cylinder, facilitating uniform force on the liquid as it flows out of the spirals and reunites as a whole. This allows the gas to converge in a straight line below the central cylinder, improving the gas separation effect. Furthermore, the radial arrangement of the liquid inlet pipe facilitates installation of the housing in a pipeline.

[0019] In the above-mentioned device for separating gas from liquid, a safety valve is connected to the side wall of the exhaust chamber.

[0020] In the above-mentioned device for separating gas from liquid, the liquid outlet pipe is arranged at the bottom center of the separation chamber, the blocking member includes a baffle and a guide cylinder fixed below the baffle, the guide cylinder is inserted into the liquid outlet pipe, the guide cylinder has a liquid hole, the liquid outlet pipe has a limiting portion or a limiting member, when the guide cylinder moves downward to contact the limiting portion or the limiting member, there is a spacing distance between the lower surface of the baffle and the bottom surface of the separation chamber, as the guide cylinder moves downward, the conduction area of ​​the liquid hole located above the bottom surface of the separation chamber gradually becomes smaller, and a spring is provided between the blocking member and the liquid outlet pipe.

[0021] The liquid in the separation chamber flows out through the baffle, the gap between its lower surface and the chamber floor, the liquid passage hole, and the inner hole of the liquid outlet pipe. When a large amount of gas is mixed with the liquid, the pressure in the pipeline suddenly increases, causing the pressure in the separation chamber to rise. The downward pressure on the baffle causes the blocking member, specifically the baffle and guide cylinder, to move downward. After the baffle moves downward, it not only remains in its central position, blocking the gas, but also increases the height of the vortex space, extending the distance the liquid travels during the vortex rotation and facilitating the separation of more gas from the liquid. At the same time, after the guide cylinder moves downward, it is in contact with the limiting portion or the limiting member. At this time, the distance between the lower surface of the baffle and the bottom surface of the separation chamber is reduced, but there is still a certain spacing distance, and the conduction area of ​​the flow hole gradually decreases but does not reach zero when the blocking member moves downward. The flow hole still keeps the separation chamber and the inner hole of the liquid outlet pipe connected, so that the liquid can continue to flow out through the blocking member and the liquid outlet pipe, that is, after the baffle moves downward, the blocking member does not completely close the liquid outlet pipe, while reducing the circulation volume, allowing the liquid to flow out at a certain flow rate, maintaining the flow of the liquid so that the vortex motion continues in the separation chamber, thereby ensuring that the gas can continue to be separated from the liquid and discharged through the exhaust chamber. When the gas no longer mixes into the liquid in large quantities and returns to normal, under the action of the spring, the blocking member moves upward and resets, restoring the normal circulation of the liquid. Therefore, the present device ensures the degassing effect when a large amount of gas is mixed into the liquid, and reduces the possibility of gas flowing out of the liquid outlet pipe with the liquid.

[0022] In the above-mentioned device for separating gas from liquid, a shoulder is provided on the outer surface of the guide cylinder, the limiting portion is located at the upper port of the liquid outlet pipe or the limiting member is fixed at the upper port of the liquid outlet pipe, the shoulder is located directly above the limiting portion or the limiting member, and liquid holes are provided on the guide cylinder above and below the shoulder.

[0023] When there is no large amount of gas mixed in the liquid, the guide cylinder moves upward under the action of the spring, and the shoulder separates from the limiting portion or the limiting member, and the liquid holes above and below the shoulder are both connected, and the liquid flows through the liquid holes at a normal flow rate. When a large amount of gas is mixed in the liquid, the blocking member moves downward, and the shoulder contacts and abuts against the limiting portion or the limiting member. The liquid hole above the shoulder is not blocked and remains connected, while the liquid hole below the shoulder is gradually blocked until it is completely blocked, so that the total conductive area of ​​the liquid holes at the two positions gradually decreases but does not reach zero. At this time, the liquid only enters the liquid outlet pipe from the liquid hole above the shoulder, so that the liquid can still pass through the blocking member at a certain flow rate when the flow rate is reduced. The liquid flow causes the separation chamber to continue to perform vortex motion to separate the gas, ensuring the degassing effect and reducing the possibility of gas flowing out of the liquid outlet pipe with the liquid.

[0024] In the aforementioned device for separating gas from liquid, the lower surface of the blocking shoulder is an inverted-conical abutment surface, and the limiting portion or limiting member has an inverted-conical limiting surface corresponding to the abutment surface. The inverted conical shape of both the abutment surface and the limiting surface provides radial and axial positioning when in contact, preventing the blocking member from shaking after downward movement and affecting the baffle's ability to block the gas in the vortex center.

[0025] In the above-mentioned device for separating gas from liquid, the blocking member also includes a guide rod fixed under the baffle, the guide cylinder is located on the outside of the guide rod, and a guide frame located below the guide cylinder is fixed in the liquid outlet pipe, the guide rod is inserted into the guide frame, the spring is sleeved outside the guide rod and located inside the guide cylinder, and the upper and lower ends of the spring respectively abut against the blocking member and the guide frame.

[0026] The guide rod guides and limits the spring, preventing it from bulging laterally during compression, ensuring stable operation. The guide rod and guide frame cooperate to guide the upward and downward movement of the blocking member, ensuring accurate movement.

[0027] In the above-mentioned device for separating gas from liquid, the liquid outlet pipe is arranged at the bottom center of the separation chamber, the blocking member includes a baffle and a guide rod fixed under the baffle, and a guide frame is provided on the liquid outlet pipe. The guide rod is inserted into the guide frame, and the guide rod has a limiting portion. When the guide rod moves downward until the limiting portion contacts the guide frame, there is a spacing distance between the lower surface of the baffle and the bottom surface of the separation chamber. A spring is provided on the guide rod, and the upper and lower ends of the spring respectively abut against the blocking member and the guide frame.

[0028] The liquid in the separation chamber flows out through the baffle, the gap between its lower surface and the bottom of the separation chamber, and the inner hole of the liquid outlet pipe. When a large amount of gas is mixed with the liquid, the pressure in the pipeline suddenly increases, causing the pressure in the separation chamber to rise. The downward pressure on the baffle causes the blocking member, specifically the baffle and guide rod, to move downward. After the baffle moves downward, it not only remains in its central position, blocking the gas, but also increases the height of the vortex space, extending the distance the liquid travels during the vortex rotation and facilitating the separation of more gas from the liquid. At the same time, after the guide rod moves downward, it is in contact with the guide frame at the limiting portion. At this time, the distance between the lower surface of the baffle and the bottom surface of the separation chamber is reduced, but there is still a certain spacing distance, so that the separation chamber and the inner hole of the liquid outlet pipe remain connected, so that the liquid can continue to flow out through the blocking member and the liquid outlet pipe, that is, after the baffle moves downward, the blocking member does not completely close the liquid outlet pipe, while reducing the circulation volume, allowing the liquid to flow out at a certain flow rate, maintaining the flow of the liquid so that the vortex motion continues in the separation chamber, thereby ensuring that the gas can continue to be separated from the liquid and discharged through the exhaust chamber. When the gas is no longer mixed into the liquid in large quantities and returns to normal, under the action of the spring, the blocking member moves upward and resets, restoring the normal circulation of the liquid. Therefore, the present device ensures the degassing effect when a large amount of gas is mixed into the liquid, and reduces the possibility of gas flowing out of the liquid outlet pipe with the liquid.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. When the liquid swirls under the central cylinder, the force is evenly distributed, causing the gas to gather in a straight line below the central cylinder, thereby improving the gas separation effect.

[0031] 2. The arrangement of multiple spiral blades enables the liquid to quickly form the required centrifugal force, which can shorten the axial height of the spiral blades, thereby reducing the overall height of the shell and making the device easy to install in the pipeline.

[0032] 3. The structure of the barrier allows the liquid to be divided before it flows out of the liquid outlet pipe. The liquid is divided into outer liquid and cavity liquid by the barrier. The cavity liquid continues to rotate in the cavity of the barrier to separate the gas, thereby improving the gas separation effect.

[0033] 4. The central cylinder is tapered, which can increase the flow rate and centrifugal force of the liquid when it flows out of the flow channel, improve the gas separation effect, and at the same time help to collect the gas and discharge it quickly.

[0034] 5. The radial arrangement of the liquid inlet pipe makes the device easy to install in the water heating pipe. It is also beneficial for the liquid to be evenly stressed when swirling under the central cylinder, thereby improving the gas separation effect.

[0035] 6. A safety valve is connected to the side wall of the exhaust chamber to improve the safety of the water heating pipes.

[0036] When a large amount of gas appears in the pipeline and the pressure inside the pipeline increases, the gas is exhausted through the exhaust hole in the exhaust chamber. At the same time, the increased pressure can also open the safety valve. The safety valve can promptly discharge a large amount of gas, avoiding the safety hazards caused by a large amount of gas flowing in the pipeline. In addition, if the exhaust component fails to exhaust normally, the safety valve can also be used to exhaust the gas, improving the safety of use.

[0037] 7. When a large amount of gas is mixed into the liquid, the blocking member moves downward to reduce the outflow of the liquid but does not completely close the liquid outlet pipe, so that the vortex space height becomes larger while the liquid maintains the vortex motion, ensuring the degassing effect and reducing the possibility of gas flowing out of the liquid with the liquid from the liquid outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a perspective view of a first embodiment of the device.

[0039] FIG2 is a perspective view of the first embodiment of the device when the shell is cut away.

[0040] FIG3 is a cross-sectional view of the first embodiment of the present device.

[0041] FIG4 is a perspective view of the inverted spiral member of the first embodiment of the present device.

[0042] FIG5 is a perspective view of a blocking member according to an embodiment of the present device.

[0043] FIG6 is a cross-sectional view of the second embodiment of the device.

[0044] FIG7 is a perspective view of the housing of the device according to the third embodiment after the blocking member is moved downward.

[0045] FIG8 is a partial cross-sectional view of the blocking member in FIG7.

[0046] FIG9 is a partial cross-sectional view of the third embodiment of the device when the blocking member is reset.

[0047] FIG10 is a three-dimensional diagram of the blocking member, the limiting member and the guide frame of the third embodiment of the present device after being disassembled from the first perspective.

[0048] FIG11 is a perspective view of the blocking member, the limiting member and the guide frame of the third embodiment of the present device after being disassembled from a second perspective.

[0049] FIG12 is a partial cross-sectional view of the fourth embodiment of the device after the blocking member moves downward.

[0050] FIG13 is a partial cross-sectional view of the fifth embodiment of the present device after the blocking member moves downward.

[0051] FIG14 is a partial cross-sectional view of the fifth embodiment of the device when the blocking member is reset.

[0052] In the figure, 1, shell; 1a, exhaust chamber; 1a1, exhaust hole; 1b, separation chamber; 1b1, liquid inlet pipe; 1b2, liquid outlet pipe; 1c, partition; 1c1, air hole; 1c2, connecting ring; 1d, safety pipe; 2, center cylinder; 2a, baffle ring; 2b, center hole; 3, spiral plate; 3a, flow channel; 3b, outlet; 4, blocking member; 4a, baffle; 4a1, concave cavity; 4a2, convex ring; 4b, connecting cylinder; 4b1, through hole; 4c, fixing ring; 4d, guide cylinder; 4d1, liquid hole; 4d2, baffle shoulder; 4d3, abutment surface; 4e, guide rod; 4e 1. Top plate; 4f. Blocking part; 5. Water gap; 6. Air guide plate; 6a. Air vent; 7. Exhaust assembly; 7a. Float; 7b. Lever; 7c. Exhaust core; 7d. Exhaust spring; 7e. Exhaust seat; 7f. Guide rod; 8. Safety valve; 8a. Valve body; 8a1. Valve seat; 8a2. Valve hole; 8b. Valve stem; 8c. Membrane; 8d. Safety spring; 9. Clamp; 10. Liquid inlet connector; 11. Liquid outlet connector; 12. Safety connector; 13. Limiting piece; 14. Limiting part; 14a. Abutment surface; 15. Guide frame; 15a. Liquid hole; 16. Spring; δ. Spacing distance. DETAILED DESCRIPTION

[0053] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0054] Example 1

[0055] As shown in Figures 1 and 2, a device for separating gas from liquid includes a housing 1. The upper portion of the housing 1 has an exhaust chamber 1a, and the lower portion of the housing 1 has a separation chamber 1b. The side walls of the exhaust chamber 1a and the separation chamber 1b are both cylindrical. A partition 1c is provided between the exhaust chamber 1a and the separation chamber 1b, and the partition 1c is provided with a plurality of air holes 1c1. An exhaust assembly 7 is mounted on the exhaust chamber 1a. The walls of the exhaust chamber 1a and the exhaust assembly 7 form an exhaust valve. A safety valve 8 is connected to the side wall of the exhaust chamber 1a. A safety pipe 1d is provided on the side wall of the exhaust chamber 1a. A safety connector 12 is connected to the safety pipe 1d. The inlet end of the safety valve 8 and the safety connector 12 are quickly connected via a clamp 9. The outlet end of the safety valve 8 is positioned downward. A liquid inlet pipe 1b1 is provided at the upper end of the separation chamber 1b, communicating with the separation chamber 1b. A liquid outlet pipe 1b2 is provided at the lower end of the separation chamber 1b, communicating with the separation chamber 1b. The liquid inlet pipe 1b1 is arranged radially, and the liquid outlet pipe 1b2 is arranged axially. A liquid inlet connector 10 is connected to the liquid inlet pipe 1b1, and a liquid outlet connector 11 is connected to the liquid outlet pipe 1b2. The device is connected to a pipeline via the liquid inlet connector 10 and the liquid outlet connector 11. For ease of assembly, the housing 1 is composed of an upper cover, a middle body, and a lower body. The upper cover is threadedly connected to the upper end of the middle body. The upper portion of the upper cover and the middle body form an exhaust chamber 1a. The lower body is threadedly connected to the lower end of the middle body. The lower body and the lower portion of the middle body form a separation chamber 1b.

[0056] As shown in Figures 2 and 3, a central cylinder 2 arranged in the vertical direction is fixed in the separation chamber 1b. The central cylinder 2 has a conical shape that is smaller at the top and larger at the bottom. The gap between the outer side of the central cylinder 2 and the side wall of the separation chamber 1b gradually decreases from top to bottom, and the inner hole of the central cylinder 2 gradually increases from bottom to top. The central cylinder 2 is coaxial with the separation chamber 1b. The exhaust chamber 1a and the separation chamber 1b are connected through the central cylinder 2. The lower surface of the partition 1c is located outside the air hole 1c1 and has a downwardly protruding connecting ring 1c2. The upper end of the central cylinder 2 is plugged into the connecting ring 1c2 to form a threaded connection. Several spiral blades 3 arranged in a spiral direction in the vertical direction are fixed between the central cylinder 2 and the shell 1. Several spiral blades 3 are arranged alternately to form flow channels 3a with the same number of spiral blades 3. The outlet 3b of the flow channel 3a is located at the lower end of the central cylinder 2, and the outlet 3b of the flow channel 3a is roughly evenly distributed along the circumference of the central cylinder 2. In this embodiment, the inner sidewalls of the spirals 3 are fixed to the central cylinder 2, and the outer sidewalls of the spirals 3 are in contact with or slightly spaced from the sidewalls of the separation chamber 1b. The spirals 3 and the central cylinder 2 form a spiral element. In this embodiment, two spirals 3 are provided, but three, four, five, six, or more spirals 3 may also be provided. The greater the flow rate, the more spirals 3 are provided. As shown in Figure 4, the spirals 3 are arranged in an equidistant spiral arrangement, with the lower ends of all spirals 3 located at the same height of the central cylinder 2, and the lower ends of all spirals 3 are flush with the lower end of the central cylinder 2. The upper ends of all spirals 3 are located at the same height of the central cylinder 2, with a gap between the upper ends of the spirals 3 and the lower surface of the partition 1c, ensuring that liquid can smoothly enter all flow passages 3a. A protruding annular retaining ring 2a is provided on the inner side surface of the upper portion of the central cylinder 2, with a center hole 2b at the center of the retaining ring 2a. The upper ends of the flow passages 3a are open, ensuring that liquid can pass through all flow passages 3a.

[0057] As shown in Figures 2 and 3, the liquid outlet pipe 1b2 is located on the bottom wall of the separation chamber 1b and faces downward. A barrier 4 is also located below the central cylinder 2. A water-passing gap 5 is formed between the barrier 4 and the sidewall of the separation chamber 1b. A gap 5 is formed between the barrier 4 and the central cylinder 2, creating a vortex space. The upper surface of the barrier 4 has a downwardly recessed cavity 4a1. A baffle 4a, roughly bowl-shaped or dish-shaped, is located on the upper end of the barrier 4. The cavity 4a1 is positioned above the baffle 4a and faces the central cylinder 2. The bottom surface of the cavity 4a1 is flat, while the sides of the cavity 4a1 are curved. A straight cylindrical protrusion 4a2 is located on the upper edge of the baffle 4a, creating the water-passing gap 5 between the protrusion 4a2 and the sidewall of the separation chamber 1b. The protrusion 4a2 is positioned corresponding to the spiral flight 3, and its maximum outer diameter is larger than the maximum outer diameter of the central cylinder 2. The lower surface of the barrier 4 has a connecting tube 4b that is inserted into the liquid outlet pipe 1b2. The upper end of the connecting tube 4b extends out of the liquid outlet pipe 1b2 and defines a through hole 4b1. As shown in Figure 5, there are four through holes 4b1, evenly spaced along the circumference. The connecting tube 4b is inserted into the liquid outlet pipe 1b2 and forms a threaded connection.

[0058] As shown in Figure 3, the top of the exhaust chamber 1a is provided with an exhaust hole 1a1. An air guide plate 6 is fixed between the upper cover and the upper end of the middle body, with an air vent 6a formed in the air guide plate 6. The exhaust assembly 7 comprises a float 7a, a lever 7b, an exhaust core 7c, an exhaust spring 7d, and an exhaust seat 7e. The exhaust seat 7e is fixed to the air guide plate 6 and positioned below the air vent 6a. One end of the lever 7b is hinged to the exhaust seat 7e, and the other end of the lever 7b is hooked to the float 7a. The float 7a is positioned within the exhaust chamber 1a. The exhaust core 7c is mounted in the exhaust seat 7e. The upper end of the exhaust core 7c passes through the lever 7b and is inserted into the air vent 6a. The lever 7b acts on the exhaust core 7c, causing it to move downward. An exhaust spring 7d is connected between the exhaust core 7c and the exhaust seat 7e, acting on the exhaust core 7c to close the air vent 6a. A guide rod 7f, positioned upward, is mounted on partition 1c, and float 7a is mounted on this guide rod. During normal water supply, liquid enters exhaust chamber 1a, lifting float 7a. Lever 7b is unloaded, and exhaust core 7c, under the action of exhaust spring 7d, closes vent 6a. As gas accumulates in exhaust chamber 1a, the liquid level therein continuously drops, causing float 7a to move downward, rotating lever 7b. Lever 7b acts on exhaust core 7c, forcing it to overcome the elastic force of exhaust spring 7d and move downward, opening vent 6a for exhaust. After the gas is exhausted, the liquid level in exhaust chamber 1a rises, lifting float 7a again, and reclosing vent 6a.

[0059] As shown in Figure 3, the safety valve 8 comprises a valve body 8a and a valve stem 8b. The valve body 8a is provided with a valve seat 8a1, which defines a valve hole 8a2 connecting the inlet and outlet ends of the valve body 8a. A diaphragm 8c and a safety spring 8d are connected to the valve stem 8b. The outer edge of the diaphragm 8c is fixed to the valve body 8a, while the center of the diaphragm 8c is fixed to the inner end of the valve stem 8b. The safety spring 8d acts on the valve stem 8b, forcing the diaphragm 8c against the valve seat 8a1, closing the valve hole 8a2. When a large amount of gas is mixed with the liquid, increasing the pressure in the pipeline, a large amount of gas enters the exhaust chamber 1a. As the gas is exhausted through the exhaust assembly 7, the gas pushes the valve stem 8b of the safety valve 8 outward, causing the inner end of the valve stem 8b to leave the valve seat 8a1, opening the valve hole 8a2, and allowing the large amount of gas to be discharged through the safety valve 8.

[0060] When the device is in use, the liquid containing gas enters the separation chamber 1b from the liquid inlet pipe 1b1, and then the liquid is divided into several streams of liquid under the dividing action of the spiral blade 3 and spirally moves downward in the flow channel 3a. The several streams of liquid spirally flowing out from the outlet 3b at the lower end of the flow channel 3a are combined into a whole and enter the vortex space. This whole liquid is in a vortex state in the vortex space and is uniformly forced in the circumferential direction, so that the gas gathers along a straight line at the center of the vortex, that is, the center of the vortex forms a straight line in the axial direction. The liquid at the bottom enters the concave cavity 4a1 of the blocking member 4 to continue gas separation, and the gas is blocked by the side wall of the blocking member 4 and will not enter the liquid inlet pipe 1b1. The gas rises and enters the inner cavity of the central cylinder 2. Under the contraction effect of the central cylinder 2, the bubbles continuously collide during the rising process to form large bubbles, which rise rapidly into the exhaust chamber 1a and are finally discharged from the shell 1 through the exhaust component 7. The degassed liquid flows out from the liquid outlet pipe 1b2. The gas gathers along a straight line at the center of the vortex, making full use of the centrifugal force generated by the spiral motion of the liquid, so that the separation device can improve the gas separation effect.

[0061] Example 2

[0062] As shown in Figure 6, the structure of the blocking member 4 and the connection structure of the safety valve 8 and the housing 1 are different from those in Example 1, wherein the liquid outlet pipe 1b2 is arranged on the side wall of the lower end of the separation chamber 1b, and the housing 1 is formed by the upper cover body, the middle body and the blocking member 4 connected separately. The liquid inlet pipe 1b1 and the liquid outlet pipe 1b2 are both arranged on the middle body, and the blocking member 4 is threadedly connected to the lower end of the middle body. The upper surface of the blocking member 4 has a downwardly concave cavity 4a1, and the blocking member 4 has a bowl-shaped blocking portion 4f. The cavity 4a1 is arranged on the blocking portion 4f, and the cavity 4a1 is directly opposite the central cylinder 2. The bottom surface of the cavity 4a1 is concave spherical, and the upper edge of the blocking portion 4a is higher than the inner hole of the liquid outlet pipe 1b2. There is a water flow gap 5 between the side wall of the blocking portion 4f and the side wall of the separation chamber 1b, and the water flow gap 5 is annular. The upper portion of the sidewall of the barrier portion 4f is conical, while the lower portion is cylindrical, enhancing its gas blocking effect. A retaining ring 4c is located on the outer side of the lower end of the barrier portion 4f and is fixedly connected to the housing 1. The retaining ring 4c is inserted into the lower port of the central body and forms a threaded connection. A safety pipe 1d on the sidewall of the exhaust chamber 1a is directly connected to the inlet of the safety valve 8. The remaining structure is the same as in Example 1.

[0063] Example 3

[0064] Unlike the first embodiment, the barrier member 4 is capable of vertical movement. As shown in Figures 7 and 8 , the lower surface of the barrier member 4 includes a guide cylinder 4d that is inserted into the liquid outlet pipe 1b2. The upper end of the guide cylinder 4d extends beyond the liquid outlet pipe 1b2. The guide cylinder 4d is provided with a plurality of liquid passage holes 4d1, and the liquid outlet pipe 1b2 is provided with a stopper 13. When the guide cylinder 4d moves downward until it contacts the stopper 13, a distance δ is maintained between the lower surface of the baffle 4a and the bottom surface of the separation chamber 1b. Furthermore, the separation chamber 1b maintains communication with the inner opening of the liquid outlet pipe 1b2 via the liquid passage holes 4d1 located above the stopper 13. As shown in Figures 10 and 11 , a protruding shoulder 4d2 is provided on the outer surface of the guide cylinder 4d. The stopper 13 is fixed to the upper end of the liquid outlet pipe 1b2, with the shoulder 4d2 located directly above the stopper 13. Liquid passage holes 4d1 are provided on the guide cylinder 4d both above and below the shoulder 4d2. The stopper 13 is a cylindrical bushing, into which the guide cylinder 4d is inserted, with the outer surface of the guide cylinder 4d abutting against the inner surface of the bushing. The bushing is inserted into the inner hole at the upper end of the liquid outlet pipe 1b2 and forms a threaded connection, allowing the guide cylinder 4d to slide up and down within the bushing. The lower surface of the shoulder 4d2 is an inverted conical abutment surface 4d3, and the upper end of the stopper 13 has an inverted conical stopper surface 14a corresponding to the abutment surface 4d3. The blocking member 4 also includes a guide rod 4e fixed below the baffle 4a, with the guide cylinder 4d located outside the guide rod 4e. A guide frame 15 is fixed to the liquid outlet pipe 1b2, located below the guide cylinder 4d. The guide frame 15 has a liquid passage hole 15a. The upper end of the guide rod 4e has a top plate 4e1, which is fixed to the baffle 4a. The guide rod 4e is inserted into the guide frame 15 and can slide up and down. The spring 16 is mounted outside the guide rod 4e and located inside the guide cylinder 4d. The two ends of the spring 16 respectively abut against the top plate 4e1 and the guide frame 15. The other structures are the same as those in the first embodiment.

[0065] As shown in Figures 7 and 8, when the blocking member 4 moves downward, the baffle 4a, guide cylinder 4d, and guide rod 4e all move downward. The guide frame 15 and bushing remain stationary, and the spring 16 is compressed, exerting an upward force on the blocking member 4. As the baffle 4a moves downward, a distance δ separates the baffle 4a from the bottom of the housing 1, increasing the height of the vortex space. As the guide cylinder 4d moves downward, the abutment surface 4d3 on the shoulder 4d2 abuts the stopper surface 14a of the stopper 13. The liquid passage 4d1 below the shoulder 4d2 enters and is blocked by the bushing, while the liquid passage 4d1 above the shoulder 4d2 is exposed outside the liquid outlet pipe 1b2. The separation chamber 1b and the liquid outlet pipe 1b2 are connected through the liquid passage 4d1 above the shoulder 4d2, resulting in a reduced but not zero cross-sectional area for liquid flow. As the blocking member 4 moves downward, the conductive area of ​​the liquid passage 4d1 above the bottom surface of the separation chamber 1b gradually decreases. As shown in Figure 9, the blocking member 4 rises and resets due to the elastic force of spring 16, and the baffle 4a, guide cylinder 4d, and guide rod 4e move upward together. After the baffle 4a moves upward, a reset gap is established between its lower surface and the bottom surface of the separation chamber 1b. This reset gap is greater than the gap δ after the baffle 4a moves downward, restoring the height of the vortex space. After the guide cylinder 4d moves upward, the abutment surface 4d3 on the shoulder 4d2 separates from the limiting surface 14a of the limiting portion 14. The liquid passage 4d1 below the shoulder 4d2 moves upward, revealing the liquid outlet pipe 1b2. The liquid passage 4d1 above the shoulder 4d2 remains exposed outside the liquid outlet pipe 1b2. The separation chamber 1b is connected to the liquid outlet pipe 1b2 through the liquid passage 4d1 above and below the shoulder 4d2, restoring the liquid flow cross-sectional area.

[0066] Example 4

[0067] As shown in Figure 12, the liquid outlet pipe 1b2 has a limiting portion 14, which is located at the upper end of the liquid outlet pipe 1b2 and has a limiting surface 14a. Other structures are the same as those in the third embodiment.

[0068] Example 5

[0069] As shown in Figures 13 and 14, compared to Example 3, the blocking member 4 lacks a guide cylinder 4d, and the liquid outlet pipe 1b2 lacks a bushing. The blocking member 4 includes a baffle 4a and a guide rod 4e fixed below the baffle 4a. A guide frame 15 is fixed to the liquid outlet pipe 1b2, and the guide rod 4e is inserted into the guide frame 15. The guide rod 4e has a stopper 14. The outer surface of the guide rod 4e has a shoulder located above the guide frame 15, which serves as the stopper 14. When the guide rod 4e moves downward until the stopper 14 contacts the guide frame 15, a distance δ is defined between the lower surface of the baffle 4a and the bottom surface of the separation chamber 1b. A spring 16 is provided between the blocking member 4 and the liquid outlet pipe 1b2. The spring 16 is mounted on the guide rod 4e, and its ends respectively abut against the blocking member 4 and the guide frame 15. The remaining structure is the same as Example 3.

Claims

1. A device for separating gas from liquid, comprising a shell (1), wherein the upper and lower parts of the shell (1) respectively have an exhaust chamber (1a) and a separation chamber (1b), an exhaust assembly (7) is installed on the exhaust chamber (1a), and the upper and lower ends of the separation chamber (1b) are respectively provided with a liquid inlet pipe (1b1) and a liquid outlet pipe (1b2), a central cylinder (2) and a blocking member (4) located below the central cylinder (2) are fixed in the separation chamber (1b), and the separation chamber (1b) and the exhaust chamber (1a) are connected through the central cylinder (2), characterized in that: A plurality of spiral blades (3) spirally arranged along the up-down direction are fixed between the shell (1) and the central cylinder (2), and the plurality of spiral blades (3) are alternately arranged to form flow channels (3a) having the same number as the spiral blades (3). The outlets (3b) of the flow channels (3a) are located outside the lower end of the central cylinder (2), and the outlets (3b) of the flow channels (3a) are roughly evenly distributed along the circumference of the central cylinder (2). The upper surface of the blocking member (4) has a downwardly concave cavity (4a1), and the cavity (4a1) faces the central cylinder (2).

2. The device for separating gas from liquid according to claim 1, characterized in that The central cylinder (2) is in a conical shape with a smaller top and a larger bottom, and the side wall of the separation chamber (1b) is in a straight cylindrical shape.

3. The device for separating gas from liquid according to claim 2, characterized in that A protruding annular retaining ring (2a) is provided on the inner side surface of the upper portion of the central cylinder (2).

4. The device for separating gas from liquid according to claim 2, characterized in that The lower ends of all spiral sheets (3) are flush with the lower end of the central cylinder (2).

5. The device for separating gas from liquid according to any one of claims 1 to 4, characterized in that: The liquid outlet pipe (1b2) is located on the bottom wall of the separation chamber (1b); the bottom surface of the concave cavity (4a1) is flat; the side surface of the concave cavity (4a1) is arc-shaped; a straight cylindrical convex ring (4a2) is provided on the mouth edge of the concave cavity (4a1); a water-passing gap (5) is provided between the convex ring (4a2) and the side wall of the separation chamber (1b); the lower surface of the blocking member (4) has a connecting tube (4b) inserted into the liquid outlet pipe (1b2); the upper end of the connecting tube (4b) extends out of the liquid outlet pipe (1b2) and is provided with a through hole (4b1).

6. The device for separating gas from liquid according to any one of claims 1 to 4, characterized in that: The liquid outlet pipe (1b2) is arranged on the side wall of the lower end of the separation chamber (1b); the bottom surface of the concave cavity (4a1) is a concave spherical surface; the lower part of the side surface of the concave cavity (4a1) is a cylindrical surface; the upper part of the side surface of the concave cavity (4a1) is a conical surface; the upper edge of the blocking member (4) is higher than the inner hole of the liquid outlet pipe (1b2); and a water-passing gap (5) is provided between the blocking member (4) and the side wall of the separation chamber (1b).

7. The device for separating gas from liquid according to claim 6, characterized in that A fixing ring (4c) is provided on the outer side surface of the lower end of the blocking member (4), and the fixing ring (4c) is fixedly connected to the housing (1).

8. The device for separating gas from liquid according to any one of claims 1 to 4, characterized in that: The outer side walls of the spiral blades (3) are in contact with or slightly spaced from the cavity wall of the separation chamber (1b), and the inner side walls of the spiral blades (3) are fixed to the central cylinder (2).

9. The device for separating gas from liquid according to any one of claims 1 to 4, characterized in that: The liquid inlet pipe (1b1) corresponds to the upper end of the central cylinder (2) and is arranged along the radial direction of the central cylinder (2).

10. The device for separating gas from liquid according to any one of claims 1 to 4, characterized in that: A safety valve (8) is connected to the side wall of the exhaust chamber (1a).

11. The device for separating gas from liquid according to any one of claims 1 to 4, characterized in that: The liquid outlet pipe (1b2) is arranged at the bottom center of the separation chamber (1b); the blocking member (4) includes a baffle (4a) and a guide cylinder (4d) fixed below the baffle (4a); the guide cylinder (4d) is inserted into the liquid outlet pipe (1b2); the guide cylinder (4d) has a liquid through hole (4d1); the liquid outlet pipe (1b2) has a limiting portion (14) or a limiting member (13); when the guide cylinder (4d) moves downward until it contacts the limiting portion (14) or the limiting member (13), a spacing distance (δ) is provided between the lower surface of the baffle (4a) and the bottom surface of the separation chamber (1b); as the guide cylinder (4d) moves downward, the conductive area of ​​the liquid through hole (4d1) located above the bottom surface of the separation chamber (1b) gradually decreases; and a spring (16) is provided between the blocking member (4) and the liquid outlet pipe (1b2).

12. The device for separating gas from liquid according to claim 11, characterized in that A stop shoulder (4d2) is provided on the outer surface of the guide cylinder (4d); the limiting portion (14) is located at the upper end of the liquid outlet pipe (1b2) or the limiting member (13) is fixed to the upper end of the liquid outlet pipe (1b2); the stop shoulder (4d2) is located directly above the limiting portion (14) or the limiting member (13); and liquid through holes (4d1) are provided on the guide cylinder (4d) above and below the stop shoulder (4d2).

13. The device for separating gas from liquid according to claim 12, characterized in that The lower surface of the shoulder (4d2) is an inverted conical abutting surface (4d3), and the limiting portion (14) or the limiting member (13) has an inverted conical limiting surface (14a) corresponding to the abutting surface (4d3).

14. The device for separating gas from liquid according to claim 11, wherein The blocking member (4) further comprises a guide rod (4e) fixed below the baffle (4a); the guide cylinder (4d) is located outside the guide rod (4e); a guide frame (15) located below the guide cylinder (4d) is fixed in the liquid outlet pipe (1b2); the guide rod (4e) is plugged into the guide frame (15); the spring (16) is sleeved outside the guide rod (4e) and located inside the guide cylinder (4d); the upper end and the lower end of the spring (16) respectively abut against the blocking member (4) and the guide frame (15).

15. The device for separating gas from liquid according to any one of claims 1 to 4, characterized in that: The liquid outlet pipe (1b2) is arranged at the bottom center of the separation chamber (1b); the blocking member (4) comprises a baffle (4a) and a guide rod (4e) fixed below the baffle (4a); a guide frame (15) is arranged on the liquid outlet pipe (1b2); the guide rod (4e) is plugged into the guide frame (15); the guide rod (4e) has a limiting portion (14); when the guide rod (4e) moves downward until the limiting portion (14) contacts the guide frame (15), a spacing distance (δ) is provided between the lower surface of the baffle (4a) and the bottom surface of the separation chamber (1b); a spring (16) is sleeved on the guide rod (4e); the upper end and the lower end of the spring (16) respectively abut against the blocking member (4) and the guide frame (15).

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