A negative pressure water gas separator

Abstract

The application provides a negative pressure water-gas separation device, and relates to the technical field of water-gas separation, which comprises a shell, a temporary storage cavity, a separation cavity and an adjusting cavity are formed in the shell, and a valve is slidably arranged in the adjusting cavity; a vacuum pump is operated to reduce the pressure of the process cavity; when the pressure of the process cavity is relatively high, the valve is opened, and a separation assembly can separate the gas and liquid drops drawn out from the process cavity; when the pressure of the process cavity is relatively low, the valve is first closed, the gas and mist drops drawn out from the process cavity are stored in the temporary storage cavity, then the valve is slid along the adjusting cavity to reduce the pressure of the temporary storage cavity, so that the pressure of the process cavity is reduced to a target value; when the pressure of the temporary storage cavity is increased, the mist drops stored in the temporary storage cavity are converted into liquid drops and are transported to the separation assembly along with the liquid drops drawn out from the process cavity to be separated from the gas, so that the fine mist drops can be effectively separated and captured.

Description

Technical Field

[0001] This invention relates to the field of water-gas separation technology, and in particular to a negative pressure water-gas separation device. Background Technology

[0002] In modern industrial production, processes such as mold making, die casting, and plastic extrusion molding widely employ negative pressure systems to establish and maintain a stable vacuum environment to eliminate product defects and improve production quality and process stability. In die casting, the negative pressure system is used to intermittently evacuate the mold cavity, maintaining this vacuum level until the melt filling is complete. This effectively eliminates defects such as bubbles and scorch marks generated during the filling process, significantly improving the surface quality and mechanical properties of the casting. To ensure smooth demolding, the mold surface is typically sprayed with a water-based release agent diluted with water. However, after spraying, residual moisture on the cavity surface is prone to dripping under gravity, leading to uneven distribution of the release agent and affecting the demolding effect and final product quality. Therefore, during the vacuuming process, a vacuum pump not only provides a barrier-free environment for melt filling but also reduces the internal pressure of the cavity, allowing residual moisture in the release agent to be drawn into the vacuum line with the airflow, improving the uniformity of the release agent distribution.

[0003] In plastic extrusion molding, a negative pressure system is used for continuous vacuum degassing in the extruder's exhaust section. This system evacuates the exhaust chamber to a set vacuum level and maintains it for an extended period to remove volatile components such as moisture, monomers, and oligomers from the molten plastic. This prevents defects such as bubbles, silver streaks, porosity, and yellowing from appearing in the finished product, while also avoiding hydrolytic degradation of the material. During this process, the vacuum pump runs continuously, and the extracted gas continuously contains liquid water droplets, oil mist, and volatile solvents.

[0004] In both of the aforementioned processes, the vacuuming process exhibits distinct phased characteristics: In the initial stage of vacuuming, the pressure within the chamber exceeds the flash evaporation critical value for moisture and various volatile components, causing liquid substances to be extracted primarily as large-diameter droplets carried by the airflow; in the subsequent stage, the pressure within the chamber drops below the flash evaporation critical value and remains stable, causing the remaining liquid substances to flash evaporate and transform into extremely small liquid droplets that disperse in the airflow. To prevent liquid media from entering the vacuum pump and causing problems such as pump body corrosion, lubricant emulsification, and seal failure, the industry commonly installs water-gas separation devices in the negative pressure path. Existing devices are mainly designed based on physical principles such as gravity settling, centrifugal separation, collision coalescence, and adsorption, with some incorporating multiple separation mechanisms to improve separation efficiency. However, traditional separation devices relying solely on gravity settling are insufficient to effectively capture these fine liquid droplets, resulting in some liquid media entering the vacuum pump with the gas. This not only reduces the pumping efficiency and vacuum stability but may also cause equipment failure due to liquid impact or corrosion, significantly increasing the maintenance costs and downtime risks of the vacuum system.

[0005] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] Therefore, it is necessary to provide a negative pressure water-gas separation device to address the problems existing in current water-gas separation devices.

[0007] The above objectives are achieved through the following technical solutions: A negative pressure water-gas separation device includes a housing with an extraction pipe and an inlet pipe. A temporary storage chamber and a separation chamber are formed within the housing. The extraction pipe is connected to a vacuum pump at both ends and to the separation chamber, respectively. A separation assembly is located within the separation chamber. The inlet pipe is connected to the temporary storage chamber and a process chamber at both ends, allowing a gas-liquid mixture from the process chamber to be introduced into the temporary storage chamber. An adjustment chamber and a valve are provided between the temporary storage chamber and the separation chamber. The valve can slide along the adjustment chamber to decrease or increase the pressure in the temporary storage chamber. When the valve is open, the temporary storage chamber and the separation chamber are connected; when the valve is closed, the temporary storage chamber and the separation chamber are isolated. The vacuum pump operates to... The pressure in the process chamber decreases. When the pressure in the process chamber is greater than the preset value, the liquid medium in the process chamber exists in the form of droplets. The valve opens, and the separation component can separate the gas and droplets extracted from the process chamber. When the pressure in the process chamber is less than or equal to the preset value, the liquid medium in the process chamber exists in the form of mist. The valve closes first, and the gas and mist extracted from the process chamber are stored in the temporary storage chamber. The valve then slides along the regulating chamber to reduce the pressure in the temporary storage chamber. The droplet size is larger than the mist size. The valve is equipped with an adjustment control, which is used to make the valve slide in the opposite direction along the regulating chamber and open the valve.

[0008] Further, the valve includes a valve cylinder and a valve core. The valve cylinder can slide along the regulating chamber to decrease or increase the pressure in the temporary storage chamber. The valve cylinder has a through hole for communicating between the temporary storage chamber and the separation chamber. The valve core can slide along the valve cylinder to block or open the through hole, thereby closing or opening the valve. The direction from the separation chamber to the temporary storage chamber within the regulating chamber is referred to as the first direction. An elastic element is provided within the regulating chamber, which applies a first elastic force along the first direction to the valve cylinder. A sliding cavity is formed within the valve cylinder along the first direction, and the valve core has a piston slidably connected to the sliding cavity, which is filled with gas. A blocking element is provided on the valve cylinder to apply a blocking force along the first direction to the piston. When the vacuum pump is running, the pressures of the separation chamber and the temporary storage chamber jointly apply a first force to the valve cylinder. The force acts along the first direction, and the pressures of the separation chamber and the sliding chamber together exert a second force on the valve core. When the pressure in the process chamber is greater than the preset value, the first force and the first elastic force balance the forces on the valve cylinder, and the valve cylinder remains stationary relative to the regulating chamber. At the same time, the second force and the resisting force balance the forces on the piston, and the valve core remains stationary relative to the valve cylinder, causing the valve to open. When the pressure in the process chamber is less than or equal to the preset value, the second force increases, and the piston drives the valve core to slide relative to the valve cylinder to close the valve. After the valve closes, the first force increases, and the valve cylinder slides along the regulating chamber, reducing the pressure in the temporary storage chamber. When the pressure in the process chamber decreases to the target value, the regulating device changes the first and second forces, causing the valve to slide in the opposite direction along the regulating chamber and open the valve. The target value is less than the preset value.

[0009] Furthermore, the control unit is a vacuum pump, and the sliding cavity is filled with gas at a constant pressure. When the pressure in the process cavity drops to the target value, the vacuum pump stops, and the pressure in the separation cavity increases, so that the first and second forces are reversed. The valve cylinder first slides in the opposite direction along the regulating cavity to increase the pressure in the temporary storage cavity, and then the valve core slides in the opposite direction relative to the valve cylinder to open the valve.

[0010] Furthermore, the sliding cavity is equipped with a first adjustment module, which is used to adjust the pressure of the sliding cavity.

[0011] Furthermore, the intake pipe is provided with multiple partitions; the separation assembly includes multiple partitions evenly distributed along a second direction, which is the direction from the valve to the exhaust pipe. The plane where the partitions are located is perpendicular to the second direction. Adjacent partitions are staggered in a third direction, which is perpendicular to the second direction, so that all partitions form a flow path from the valve to the exhaust pipe and bend back and forth.

[0012] Furthermore, the regulating chamber, valve, and flow passage are arranged symmetrically in two sets about the extraction pipe.

[0013] Furthermore, a liquid storage chamber is formed inside the shell, which is located below the separation chamber and the two are connected. A drain port is provided at the bottom of the shell, with the upper end of the drain port connected to the liquid storage chamber and the lower end connected to an external liquid pumping assembly. The external liquid pumping assembly is used to drain the liquid in the liquid storage chamber. A liquid level pipe is provided outside the shell, with both the upper and lower ends of the liquid level pipe connected to the liquid storage chamber.

[0014] Furthermore, a sensor is installed inside the liquid level tube to detect the liquid level in the storage chamber. When the liquid level is greater than a first height value and less than a second height value, or when the liquid level is equal to the second height value, the external liquid pumping component is in the start state; when the liquid level is less than or equal to the first height value, the external liquid pumping component is in the stop state; the first height value is less than the second height value.

[0015] Furthermore, the liquid level tube is equipped with a second adjustment module, which is used to adjust the magnitude of the first height value and the second height value.

[0016] The present invention has at least the following beneficial effects: The vacuum pump reduces the pressure in the process chamber. When the pressure exceeds the preset value, the liquid medium in the process chamber exists in the form of droplets. The valve opens, and the separation component separates the gas and droplets extracted from the process chamber. When the pressure is less than or equal to the preset value, the liquid medium exists in the form of mist. The valve closes first, and the gas and mist extracted from the process chamber are stored in the temporary storage chamber. The valve then slides along the regulating chamber to reduce the pressure in the temporary storage chamber, bringing the process chamber pressure down to the target value. When the pressure in the temporary storage chamber increases, the mist stored in the temporary storage chamber transforms into droplets and is transported to the separation component along with the droplets extracted from the process chamber, where they are separated from the gas. This effectively separates and collects the fine mist droplets, preventing some liquid medium from entering the vacuum pump with the gas and ensuring the working efficiency and stable operation of the vacuum pump. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the negative pressure water-air separation device provided in an embodiment of the present invention; Figure 2 for Figure 1 Top view; Figure 3 for Figure 2 Sectional view along axis AA; Figure 4 for Figure 3 A magnified view of a section at point B in the middle; Figure 5 for Figure 4 A magnified view of a section at point C; Figure 6 for Figure 5 A magnified view of a section at point D; Figure 7for Figure 3 A schematic diagram showing the valve in the open position; Figure 8 for Figure 7 A magnified view of a section at point E in the middle; Figure 9 for Figure 7 A schematic diagram showing the valve sliding to the bottom along the regulating chamber; Figure 10 for Figure 9 A magnified view of a section at point F in the middle; Figure 11 for Figure 2 GG-direction sectional view; Figure 12 for Figure 11 A magnified view of a section at point H.

[0018] in: 101. Housing; 102. Suction pipe; 103. Inlet pipe; 104. Separation chamber; 105. Pressure detection module; 106. Partition plate; 107. Liquid storage chamber; 108. Drain port; 201. Temporary storage chamber; 202. Adjustment chamber; 203. Valve; 204. Valve cylinder; 205. Valve core; 206. Through hole; 207. Elastic element; 208. Slide chamber; 209. Piston; 210. Obstruction element; 211. Bottom ring; 212. Sealing plate; 213. Side post; 214. First upper inclined surface; 215. First lower inclined surface; 216. Second upper inclined surface; 217. Second lower inclined surface; 218. Control chamber; 301. Liquid level tube; 302. Sensor; 303. Second adjustment module. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] Example 1 like Figures 1 to 12As shown, Embodiment 1 of the present invention provides a negative pressure water-gas separation device, including a housing 101 (hereinafter referred to as the water-gas separation device). The housing 101 has an extraction pipe 102 and an inlet pipe 103. A temporary storage chamber 201 and a separation chamber 104 are formed within the housing 101. The extraction pipe 102 is connected to a vacuum pump and the separation chamber 104 at both ends, respectively. A separation component is provided within the separation chamber 104. The inlet pipe 103 is connected to the temporary storage chamber 201 and a process chamber at both ends, allowing the gas-liquid mixture in the process chamber to be introduced into the temporary storage chamber 201. An adjustment chamber 202 and a valve 203 are provided between the temporary storage chamber 201 and the separation chamber 104. The valve 203 can slide along the adjustment chamber 202 to decrease or increase the pressure in the temporary storage chamber 201. When the valve 203 is open, the pressure in the temporary storage chamber 201... The temporary storage chamber 201 is isolated from the separation chamber 104 when the valve 203 is closed. The vacuum pump operates to reduce the pressure in the process chamber. When the pressure in the process chamber is greater than the preset value, the liquid medium in the process chamber exists in the form of droplets. The valve 203 opens, and the separation component can separate the gas and droplets extracted from the process chamber. When the pressure in the process chamber is less than or equal to the preset value, the liquid medium in the process chamber exists in the form of mist. The valve 203 closes first, and the gas and mist extracted from the process chamber are stored in the temporary storage chamber 201. The valve 203 then slides along the regulating chamber 202 to reduce the pressure in the temporary storage chamber 201. The droplet size is larger than the mist size. The valve 203 is equipped with an adjustment control, which is used to make the valve 203 slide in the opposite direction along the regulating chamber 202 and open the valve 203.

[0023] When the pressure in the process chamber exceeds the preset value, the liquid medium in the process chamber exists in the form of droplets. Valve 203 opens, and the separation component can separate the gas and droplets extracted from the process chamber. When the pressure in the process chamber is less than or equal to the preset value, the liquid medium in the process chamber exists in the form of mist. Valve 203 closes first, and the gas and mist extracted from the process chamber are stored in the temporary storage chamber 201. Then, valve 203 slides along the regulating chamber 202 to reduce the pressure in the temporary storage chamber 201, thereby reducing the pressure in the process chamber to the target value. When the pressure in the temporary storage chamber 201 increases, the mist droplets stored in the temporary storage chamber 201 are converted into liquid droplets. The regulating control causes the valve 203 to slide in the opposite direction along the regulating chamber 202 and open the valve 203 to reset the valve 203. The liquid droplets stored in the temporary storage chamber 201 will be transported to the separation component along with the liquid droplets extracted from the process chamber and separated from the gas, thereby achieving effective separation and collection of fine mist droplets, avoiding some liquid media from entering the vacuum pump with the gas, and ensuring the working efficiency and stable operation of the vacuum pump.

[0024] When using it, please refer to Figure 1 and Figure 3The housing 101 is placed vertically, with the temporary storage chamber 201 higher than the separation chamber 104, and the air inlet pipe 103 located at the top. One end of the air inlet pipe 103 is connected to the temporary storage chamber 201, and the other end is connected to the process chamber. One end of the evacuation pipe 102 is connected to the vacuum pump, and the other end is connected to the separation chamber 104. The vacuum pump is then started, and a vacuum process is performed on the process chamber via the evacuation pipe 102, the separation chamber 104, the adjustment chamber 202, the temporary storage chamber 201, and the air inlet pipe 103.

[0025] It is understood that Embodiment 1 of the present invention can be applied to the die-casting process, where the process cavity is the mold cavity, and the vacuum pump needs to operate intermittently to perform intermittent evacuation of the process cavity. During each evacuation process, in the initial stage of evacuation, the pressure inside the process cavity is higher than the preset value (i.e., the flash evacuation critical value of moisture), and the residual moisture of the release agent is mainly extracted in the form of large-diameter droplets with the airflow. The separation component has a good separation effect on these large-diameter droplets and airflow. In the later stage of evacuation, the pressure inside the process cavity drops below the preset value, and the residual moisture of the release agent undergoes flash evaporation, transforming into extremely small droplets and being extracted with the airflow. The separation component has a poor separation effect on these small-diameter droplets and airflow, and these small-diameter droplets will still enter the vacuum pump with the gas, affecting the working efficiency and stable operation of the vacuum pump.

[0026] In Embodiment 1 of this invention, during a vacuuming process of the process chamber, when the pressure inside the process chamber drops below a preset value, valve 203 is closed to store the formed droplets and gas together in the temporary storage chamber 201. Valve 203 then slides along the regulating chamber 202, increasing the actual volume of the temporary storage chamber 201 and decreasing the pressure, thereby further reducing the process chamber pressure to the target value, completing the vacuuming process of the process chamber while preventing droplets from entering the vacuum pump. The process chamber pressure is maintained at the target value for a period of time until the melt filling is complete. Afterwards, the regulating valve 203 slides in the opposite direction along the regulating chamber 202, decreasing the actual volume of the temporary storage chamber 201 and increasing the pressure, causing the droplets stored in the temporary storage chamber 201 to transform into liquid droplets. Valve 203 then opens to reset it, and the process chamber pressure gradually returns to normal pressure. The droplets stored in the temporary storage chamber 201 still need to be processed. Specifically, during the next vacuuming process of the process chamber, when the pressure inside the process chamber is higher than the preset value, the residual moisture of the release agent is extracted again in the form of large-diameter droplets with the airflow. At this time, the droplets stored in the temporary storage chamber 201 can be extracted simultaneously, and the gas and droplets are separated by the separation component, thereby achieving complete separation of the extracted gas and liquid.

[0027] In addition, a pressure detection module 105 is provided on the housing 101. The pressure detection module 105 is used to detect the pressure of the temporary storage chamber 201. Since the temporary storage chamber 201 is connected to the process chamber through the air inlet pipe 103, the pressure of the process chamber can also be known. The pressure detection module 105 can be a pressure meter.

[0028] Furthermore, valve 203 includes valve cylinder 204 and valve core 205. Valve cylinder 204 can slide along regulating chamber 202 to reduce or increase the pressure in temporary storage chamber 201. Valve cylinder 204 has a through hole 206 for communicating between temporary storage chamber 201 and separation chamber 104. Valve core 205 can slide along valve cylinder 204 to block or open through hole 206, thereby closing or opening valve 203. The direction within regulating chamber 202 from separation chamber 104 to temporary storage chamber 201 is referred to as the first direction. The regulating chamber 202 is provided with an elastic element 207, which applies a first elastic force along a first direction to the valve cylinder 204; a sliding cavity 208 is formed in the valve cylinder 204 along the first direction, and the valve core 205 has a piston 209 that is slidably connected to the sliding cavity 208, which is filled with gas; a blocking element 210 is provided on the valve cylinder 204, which applies a blocking force along the first direction to the piston 209; when the vacuum pump is running, the pressure of the separation chamber 104 and the temporary storage chamber 201 is... The combined pressure of the separation chamber 104 and the sliding chamber 208 exerts a first force on the valve cylinder 204 along a first direction. The combined pressure of the separation chamber 104 and the sliding chamber 208 exerts a second force on the valve core 205. When the process chamber pressure exceeds a preset value, the first force and the first elastic force balance the forces on the valve cylinder 204, causing the valve cylinder 204 to remain stationary relative to the regulating chamber 202. Simultaneously, the second force and the resisting force balance the forces on the piston 209, causing the valve core 205 to remain stationary relative to the valve cylinder 204 and opening the valve 203. When the process chamber pressure... When the pressure is less than or equal to the preset value, the second force increases, and the piston 209 drives the valve core 205 to slide relative to the valve cylinder 204 to close the valve 203. After the valve 203 is closed, the first force increases, and the valve cylinder 204 slides along the regulating chamber 202 to reduce the pressure in the temporary storage chamber 201. When the pressure in the process chamber decreases to the target value, the regulating device changes the first and second forces, causing the valve 203 to slide in the opposite direction along the regulating chamber 202 and open the valve 203. The target value is less than the preset value.

[0029] The regulating chamber 202 is vertically positioned between the temporary storage chamber 201 and the separating chamber 104, so its first direction is vertically downward. During the evacuation of the process chamber, the forces acting on the valve cylinder 204 and the valve core 205 are analyzed. The separating chamber 104 and the temporary storage chamber 201 are located at the lower and upper parts of the valve cylinder 204, respectively. When the pressure in the process chamber exceeds the preset value, the gas in the separating chamber 104 and the gas in the temporary storage chamber 201 exert a downward first force on the valve cylinder 204. The valve cylinder 204 is also subjected to a downward gravity (negligible) and an upward elastic force, resulting in force balance. The valve cylinder 204 is stationary relative to the regulating chamber 202. At this time, the actual volume of the temporary storage chamber 201 is the smallest, and the pressure is the largest. Similarly, the separation chamber 104 and the sliding chamber 208 are located at the lower and upper parts of the piston 209, respectively. When the pressure in the process chamber exceeds a preset value, the gas in the separation chamber 104 and the gas in the sliding chamber 208 jointly exert a downward second force on the piston 209. The piston 209 is also subjected to a downward gravity (negligible) and an upward resistance force, and the piston 209 is in force balance. The valve core 205 remains stationary relative to the valve cylinder 204 and opens the through hole 206, thereby opening the valve 203. Figures 3 to 6 As shown, the gas and droplets extracted from the process chamber can enter the separation chamber 104 from the temporary storage chamber 201 through the valve 203, and the gas and droplets are separated by the separation component.

[0030] When the pressure in the process chamber is less than or equal to a preset value, initially, because valve 203 is open, the first force on valve cylinder 204 does not increase. However, for piston 209 in slide cavity 208, the second force increases, disrupting the force balance of piston 209. Piston 209 drives valve core 205 to slide downward relative to valve cylinder 204 to block through hole 206, thus closing valve 203. Figure 7 and Figure 8 As shown, the gas and droplets extracted from the process chamber are stored in the temporary storage chamber 201; and after the valve 203 is closed, the first force on the valve cylinder 204 increases, thereby breaking the force balance of the valve cylinder 204. The valve cylinder 204 slides downward along the regulating chamber 202 to increase the actual volume of the temporary storage chamber 201 and reduce the pressure, so that the pressure in the process chamber is reduced to the target value, such as... Figure 9 and Figure 10 As shown.

[0031] When the pressure in the process chamber decreases to the target value, the control switch changes the first and second forces, causing valve 203 to slide upward along the regulating chamber 202 and open. Figures 3 to 6 As shown, the mist droplets stored in the temporary storage chamber 201 are converted into liquid droplets.

[0032] In addition, the valve core 205 can slide synchronously with the valve cylinder 204 along the regulating chamber 202 to increase or decrease the volume of the temporary storage chamber 201, thereby decreasing or increasing the pressure. The valve core 205 can also slide relative to the valve cylinder 204 to block or open the through hole 206, thereby closing or opening the valve 203.

[0033] See also Figure 4 The valve cylinder 204 has an annular mounting groove at its bottom, the lower end of the regulating cavity 202 has an annular limiting plate, the upper end of the elastic element 207 is set in the mounting groove, the lower end of the elastic element 207 is fixed to the limiting plate, and the outer surface of the valve cylinder 204 has a sealing ring to ensure the sliding seal between the valve cylinder 204 and the regulating cavity 202.

[0034] The valve core 205 includes a piston 209, a bottom ring 211, a sealing plate 212, and side pillars 213. The sliding cavity 208 is an annular groove formed from bottom to top at the bottom of the valve cylinder 204. The piston 209 is annular and slidably disposed in the annular groove, and a sealing ring is provided between the two to ensure sliding sealing. The piston 209 is connected to the upper end of the bottom ring 211, which is located below the sealing plate 212, and both are coaxial with the through hole 206 of the valve cylinder 204. The side pillars 213 are disposed between the lower end of the bottom ring 211 and the sealing plate 212 to connect the two, and multiple side pillars 213 are evenly distributed along the circumference of the through hole 206, with a side hole formed between two adjacent side pillars 213. When the pressure in the process chamber exceeds a preset value, the piston 209 is positioned above the slide chamber 208, and the lower surface of the sealing plate 212 is moved away from the upper surface of the valve cylinder 204, so that the temporary storage chamber 201 is connected to the separation chamber 104 through the side hole and the through hole 206, i.e., the valve 203 is opened. Figure 4 As shown; when the pressure in the process chamber is less than or equal to the preset value, the piston 209 moves downward along the slide cavity 208 until the lower surface of the sealing plate 212 is in contact with the upper surface of the valve cylinder 204, and a sealing ring is provided between the two to ensure sealing. At this time, the sealing plate 212 separates the temporary storage cavity 201 into the through hole 206 and the separation cavity 104, that is, the valve 203 is closed. Figure 8 As shown, at this time, in the direction perpendicular to the first direction, the cross-sectional area of ​​the sealing plate 212 is larger than the cross-sectional area of ​​the valve cylinder 204, so that the first force on the valve cylinder 204 is less than the second force on the valve core 205. Therefore, the lower surface of the sealing plate 212 can remain in contact with the upper surface of the valve cylinder 204, thereby keeping the valve 203 in the closed state.

[0035] See also Figure 5 and Figure 6The obstruction member 210 is a telescopic pin structure, which can slide horizontally relative to the valve cylinder 204 to approach and move away from the piston 209. A sealing ring is provided on the outer side of the obstruction member 210 to ensure the sealing of the sliding cavity 208. At the same time, multiple obstruction members 210 are evenly distributed along the circumference of the through hole 206. In addition, the end of the obstruction member 210 near the piston 209 has a first upper inclined surface 214 and a first lower inclined surface 215 with opposite inclination directions. The first upper inclined surface 214 is inclined from top to bottom and from outside to inside, and the first lower inclined surface 215 is inclined from top to bottom and from inside to outside. A protrusion is formed between the two. Correspondingly, the side surface of the piston 209 near the obstruction member 210 has a second upper inclined surface 216 and a second lower inclined surface 217 with opposite inclination directions. The second upper inclined surface 216 is inclined from top to bottom and from inside to outside, and the second lower inclined surface 217 is inclined from top to bottom and from outside to inside. A protrusion is also formed between the two. In other words, the first upper inclined surface 214 and the second lower inclined surface 217 have the same inclination direction and angle, and the first lower inclined surface 215 and the second upper inclined surface 216 have the same inclination direction and angle. When the process chamber pressure is greater than a preset value, the first upper inclined surface 214 and the second lower inclined surface 217 come into contact, such as... Figure 5 and Figure 6 As shown, because the inclination angles of the two components are closer to horizontal, the obstruction element 210 can exert a greater obstructive force on the piston 209, ensuring the force balance of the piston 209 and keeping the valve 203 in the open state. When the pressure in the process chamber is less than or equal to a preset value, the second force increases to break the force balance of the piston 209, causing the first upper inclined surface 214 and the second lower inclined surface 217 to slide relative to each other until the obstruction element 210 disengages from the piston 209. The piston 209 then slides downward along the slide cavity 208, causing the valve core 205 to slide downward relative to the valve cylinder 204 to block the through hole 206, thus closing the valve 203. Figure 8 As shown. When the pressure in the process chamber decreases to the target value, the control switch changes the first and second forces. The upward second force causes the piston 209 to slide upward along the slide cavity 208. The second upper inclined surface 216 and the second lower inclined surface 217 contact and slide. Since their inclination angles are closer to vertical, the obstruction member 210 applies a smaller obstructive force to the piston 209, allowing the piston 209 to pass over the obstruction member 210 and return to contact between the first upper inclined surface 214 and the second lower inclined surface 217, thereby opening the valve 203. Figures 3 to 6 As shown.

[0036] Furthermore, an annular control chamber 218 is formed within the valve cylinder 204. The control chamber 218 is connected to a first external air supply device via a first air nozzle and a first air pipe, so that the control chamber 218 is filled with gas, pushing the obstruction member 210 toward the piston 209. This allows the obstruction member 210 to apply a resisting force along the first direction to the piston 209, thereby preventing the valve core 205 from sliding along the adjustment chamber 202 toward the separation chamber 104. Additionally, as... Figure 6As shown, the obstruction member 210 is equipped with a limit mechanism to restrict the ejection stroke of the obstruction member 210 towards the piston 209. The first external air supply device can be an air compressor or other components, the structure and working principle of which are existing technologies and will not be described in detail here. In other embodiments not shown, the control chamber 218 and the corresponding first external air supply device may not be provided; instead, a compression spring corresponding to the obstruction member 210 can be provided to eject the obstruction member 210 towards the piston 209.

[0037] In other embodiments not shown, valve 203 may be a solenoid valve, controlled by energizing and de-energizing it to open or close. It is equipped with a drive mechanism that causes valve 203 to slide along the regulating chamber 202, thereby adjusting the volume and pressure of the temporary storage chamber 201. The pressure detection module 105 can determine the pressure of the process chamber, and valve 203 is opened or closed based on this pressure.

[0038] Furthermore, the control device is a vacuum pump, and the sliding cavity 208 is filled with gas at a constant pressure. When the pressure in the process cavity drops to the target value, the vacuum pump stops, and the pressure in the separation cavity 104 increases, so that the first force and the second force are reversed. The valve cylinder 204 first slides in the opposite direction along the regulating cavity 202 to increase the pressure in the temporary storage cavity 201, and then the valve core 205 slides in the opposite direction relative to the valve cylinder 204 to open the valve 203.

[0039] In the die-casting process, the control device is the vacuum pump itself, and the pressure of the sliding cavity 208 is constant. During a vacuuming process of the process chamber, when the pressure of the process chamber drops to the target value, the vacuum pump stops, the separation chamber 104 gradually recovers from negative pressure to normal pressure, the first force on the valve cylinder 204 reverses, causing the valve cylinder 204 to slide in the opposite direction along the regulating cavity 202, the actual volume of the temporary storage cavity 201 decreases and the pressure increases, causing the mist droplets stored in the temporary storage cavity 201 to transform into liquid droplets; then, due to the increase in pressure in the separation chamber 104 and the constant pressure in the sliding cavity 208, the second force on the piston 209 reverses, the valve core 205 slides upward relative to the valve cylinder 204 to open the through hole 206, causing the valve 203 to open, and the pressure of the process chamber gradually recovers to normal pressure.

[0040] Furthermore, the slide cavity 208 is equipped with a first adjustment module, which is used to adjust the pressure of the slide cavity 208 and can adjust the magnitude of the second force on the piston 209 to adapt to the vacuum requirements of different process chambers and improve the applicability of the water-gas separation device.

[0041] See also Figure 3The intake pipe 103 is provided with multiple partitions; the separation assembly includes multiple partitions 106 evenly distributed along a second direction, which is the direction from the valve 203 to the exhaust pipe 102. The plane where the partitions 106 are located is perpendicular to the second direction. Adjacent partitions 106 are staggered in a third direction, which is perpendicular to the second direction, so that all partitions 106 form a flow path from the valve 203 to the exhaust pipe 102 and bend back and forth.

[0042] Gas and liquid droplets entering the separation chamber 104 flow along a reciprocating tortuous flow path. Gas, with its low inertia, bypasses the baffle and is drawn away by the extraction pipe 102, while liquid droplets, with their high inertia, directly impact the partition 106 and condense into large droplets for collection, thus achieving efficient water-gas separation. Furthermore, the extraction pipe 102 is vertically positioned at the end of the flow path, with its inlet located at the top.

[0043] Furthermore, the regulating chamber 202, valve 203, and flow passage are symmetrically arranged in two sets about the exhaust pipe 102 to improve the adjustment range of the volume of the temporary storage chamber 201 and the separation efficiency of gas and droplets.

[0044] Further, see Figure 1 and Figure 3 The housing 101 also has a liquid storage chamber 107, which is located below the separation chamber 104 and the two are connected. The bottom of the housing 101 is provided with a drain port 108, the upper end of which is connected to the liquid storage chamber 107 and the lower end is connected to an external liquid pumping assembly. The external liquid pumping assembly is used to drain the liquid in the liquid storage chamber 107. The housing 101 is provided with a liquid level pipe 301, and both the upper and lower ends of the liquid level pipe 301 are connected to the liquid storage chamber 107.

[0045] By setting the liquid level pipe 301, the liquid level in the storage chamber 107 can be known in real time and accurately. When the liquid level is high, the liquid is promptly extracted through the drain port 108 by the external liquid extraction component, so as to avoid the reduction of the effective gas buffer volume and the fluctuation of the negative pressure environment due to excessive liquid, and further serious accidents such as liquid backflow into the process chamber or vacuum pump.

[0046] The external liquid extraction assembly can be an electric pump, the structure and working principle of which are existing technologies and will not be described in detail here. In addition, a one-way valve is provided on the drain port 108 to prevent liquid in the external liquid extraction assembly from flowing back into the liquid storage chamber 107.

[0047] Further, see Figure 11 and Figure 12The liquid level tube 301 is equipped with a sensor 302, which is used to detect the liquid level in the liquid storage chamber 107. When the liquid level is greater than the first height value and less than the second height value, or when the liquid level is equal to the second height value, the external liquid pumping component is in the start state; when the liquid level is less than or equal to the first height value, the external liquid pumping component is in the stop state; the first height value is less than the second height value.

[0048] The external liquid extraction component is automatically switched between start and stop states, improving the automation level of the water-gas separation unit and ensuring continuous production without downtime. The water-gas separation unit is also equipped with a processing module, which is electrically connected to both sensor 302 and the external liquid extraction component.

[0049] Furthermore, the liquid level tube 301 is equipped with a second adjustment module 303, which is used to adjust the magnitude of the first height value and the second height value.

[0050] In this embodiment, the second adjustment module 303 can be a sleeve-type electromagnet, which is sleeved on the liquid level tube 301. The second adjustment module 303 has a rubber sleeve inside to fix it to the liquid level tube 301. The sensor 302 has a permanent magnet. When the second adjustment module 303 is energized, it attracts the permanent magnet. At this time, the second adjustment module 303 can be manually controlled to move along the liquid level tube 301, thereby moving the sensor 302 along the liquid level tube 301, thus adjusting the magnitude of the first and second height values. In other embodiments not shown, the liquid level tube 301 can be detached from the housing 101, and the sensor 302 can be moved along the liquid level tube 301 using a tool.

[0051] The working principle of Embodiment 1 of the present invention is as follows: The housing 101 is placed vertically, the air inlet pipe 103 is connected to the process chamber, and the air extraction pipe 102 is connected to the vacuum pump. Then the vacuum pump is started, and the process chamber is evacuated through the air extraction pipe 102, the separation chamber 104, the adjustment chamber 202, the temporary storage chamber 201 and the air inlet pipe 103. The pressure in the process chamber gradually decreases.

[0052] When the pressure in the process chamber exceeds the preset value, the gas in the separation chamber 104 and the gas in the temporary storage chamber 201 jointly exert a downward first force on the valve cylinder 204. The valve cylinder 204 is also subjected to an upward first elastic force, thus achieving force balance. The valve cylinder 204 is stationary relative to the regulating chamber 202. At this time, the actual volume of the temporary storage chamber 201 is at its minimum, and the pressure is at its maximum. Similarly, the gas in the separation chamber 104 and the gas in the sliding chamber 208 jointly exert a downward second force on the piston 209. The piston 209 is also subjected to an upward resisting force, thus achieving force balance. The valve core 205 is stationary relative to the valve cylinder 204 and opens the through hole 206, thereby opening the valve 203. Figures 3 to 6As shown. At this time, the liquid medium in the process chamber exists in the form of droplets. The gas extracted from the process chamber and the droplets are separated and flow through the flow path. The gas enters the vacuum pump through the suction pipe 102, while the droplets condense on the partition 106 and fall into the liquid storage chamber 107, and can be discharged through the drain port 108. Furthermore, the liquid level in the liquid storage chamber 107 can be known through the liquid level pipe 301, and the liquid level in the liquid storage chamber 107 can be accurately detected by the sensor 302. When the liquid level is high, the liquid is promptly extracted through the drain port 108 by the external liquid extraction component to avoid the reduction of the effective gas buffer volume and the fluctuation of the negative pressure environment due to excessive liquid, and to prevent serious accidents such as liquid backflow into the process chamber or vacuum pump.

[0053] When the pressure in the process chamber is less than or equal to a preset value, the liquid medium in the process chamber exists in the form of droplets. Initially, because valve 203 is open, the first force on valve cylinder 204 does not increase, but the second force on piston 209 in slide cavity 208 increases, disrupting the force balance of piston 209. Piston 209 drives valve core 205 to slide downward relative to valve cylinder 204 to block through hole 206, thus closing valve 203. Figure 7 and Figure 8 As shown, the gas and droplets extracted from the process chamber are stored in the temporary storage chamber 201; and after the valve 203 is closed, the first force on the valve cylinder 204 increases, thereby breaking the force balance of the valve cylinder 204. The valve cylinder 204 slides downward along the regulating chamber 202 to increase the actual volume of the temporary storage chamber 201 and reduce the pressure, so that the pressure in the process chamber is reduced to the target value, such as... Figure 9 and Figure 10 As shown. The pressure in the process chamber is maintained at the target value for a period of time until the melt filling is complete.

[0054] Afterwards, the vacuum pump stops, and the separation chamber 104 gradually returns from negative pressure to normal pressure. The first force on the valve cylinder 204 reverses, causing the valve cylinder 204 to slide upward along the regulating chamber 202. The actual volume of the temporary storage chamber 201 decreases while the pressure increases, causing the mist droplets stored in the temporary storage chamber 201 to transform into liquid droplets. Subsequently, due to the increased pressure in the separation chamber 104 and the constant pressure in the sliding chamber 208, the second force on the piston 209 reverses, causing the valve core 205 to slide upward relative to the valve cylinder 204 to open the through hole 206, thus opening the valve 203 and achieving the reset of the valve 203. Figures 3 to 6 As shown, the pressure in the process chamber gradually returns to normal.

[0055] The droplets stored in the temporary storage chamber 201 still need to be processed. Specifically, when the vacuum pump runs again and the pressure in the process chamber is greater than the preset value, the droplets stored in the temporary storage chamber 201 will be transported to the flow path along with the droplets extracted from the process chamber and separated from the gas. This achieves effective separation and collection of fine droplets, preventing some liquid media from entering the vacuum pump with the gas, and ensuring the working efficiency and stable operation of the vacuum pump.

[0056] Example 2 Embodiment 2 of the present invention provides a negative pressure water-gas separation device, which differs from Embodiment 1 in that: the adjustment control is used to adjust the pressure of the sliding cavity 208; when the pressure of the process cavity is reduced to the target value, the vacuum pump continues to run, and the adjustment control makes the pressure of the sliding cavity 208 lower than the pressure of the separation cavity 104, so that the second force is reversed, the valve core 205 first slides in the opposite direction relative to the valve cylinder 204 to open the valve 203, and after the valve 203 is opened, the first force is reduced, and the valve cylinder 204 then slides in the opposite direction along the adjustment cavity 202.

[0057] It is understood that Embodiment 2 of the present invention can be applied to plastic extrusion molding processes. The process chamber is the exhaust chamber of the extruder, and the vacuum pump needs to run continuously to continuously evacuate the process chamber. In the initial stage of vacuuming, the pressure inside the process chamber is higher than the preset value (i.e., the flash evaporation critical value of volatiles). The volatiles are components such as water, monomers, and oligomers contained in the molten plastic. At this time, they are mainly extracted in the form of large-diameter droplets with the airflow. The separation component has a good separation effect on these large-diameter droplets and airflow. In the later stage of vacuuming, the pressure inside the process chamber drops below the preset value. The volatiles undergo flash evaporation, transforming into extremely small droplets and being extracted with the airflow. The separation component has a poor separation effect on these small-diameter droplets and airflow. These small-diameter droplets will still enter the vacuum pump with the gas, affecting the working efficiency and stable operation of the vacuum pump.

[0058] During the continuous evacuation of the process chamber, when the pressure inside the process chamber drops below a preset value, the valve 203 is closed to store the formed droplets and gas together in the temporary storage chamber 201. The valve 203 then slides along the regulating chamber 202 to increase the actual volume of the temporary storage chamber 201, resulting in a decrease in its pressure. This allows the pressure in the process chamber to continue to decrease to the target value and remain at the target value for a period of time, preventing droplets from entering the vacuum pump.

[0059] However, the gas-liquid mixture in the newly introduced plastic causes the pressure in the process chamber to rise, causing the mist droplets stored in the temporary storage chamber 201 to transform into liquid droplets. The regulating control is a positive and negative pressure integrated test chamber, which is used to adjust the pressure of the sliding chamber 208 between positive and negative pressure. The vacuum pump continues to run, causing the pressure in the separation chamber 104 to continue to decrease. At the same time, the regulating control reduces the pressure in the sliding chamber 208 to less than the pressure in the separation chamber 104, causing the second force on the piston 209 to reverse. The valve core 205 first slides upward relative to the valve cylinder 204 to open the through hole 206, causing the valve 203 to open. After the valve 203 opens, the first force on the valve cylinder 204 decreases, and the first elastic force causes the valve cylinder 204 to slide upward along the regulating chamber 202 to reset the valve 203. The droplets stored in the temporary storage chamber 201 still need to be processed. Specifically, the vacuum pump continues to run. When the pressure in the process chamber is higher than the preset value, the volatiles are extracted again in the form of large-diameter droplets with the airflow. At this time, the droplets stored in the temporary storage chamber 201 can be extracted simultaneously, and the gas and droplets are separated by the separation component, thereby achieving complete separation of the extracted gas and liquid.

[0060] The positive and negative pressure integrated test chamber is equipped with both a positive pressure source and a negative pressure source, which are connected to the sliding cavity 208 through a second air nozzle and a second air pipe. The structure and working principle of the positive and negative pressure integrated test chamber are existing technologies and will not be described in detail here.

[0061] The difference between the working principle of Embodiment 2 and Embodiment 1 is as follows: When the pressure in the process chamber decreases to the target value, the vacuum pump continues to run, causing the pressure in the separation chamber 104 to continue to decrease. The gas-liquid mixture in the newly entered plastic causes the pressure in the process chamber to increase, causing the mist droplets stored in the temporary storage chamber 201 to be converted into liquid droplets. At the same time, the control switch reduces the pressure in the sliding chamber 208 to be less than the pressure in the separation chamber 104, causing the second force on the piston 209 to reverse. The valve core 205 first slides upward relative to the valve cylinder 204 to open the through hole 206, causing the valve 203 to open. After the valve 203 opens, the first force on the valve cylinder 204 decreases, and the first elastic force causes the valve cylinder 204 to slide upward along the adjustment chamber 202.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A negative pressure water-gas separation device, characterized in that, The device includes a housing, on which a vacuum pipe and an air inlet pipe are provided. A temporary storage chamber and a separation chamber are formed inside the housing. The two ends of the vacuum pipe are connected to a vacuum pump and the separation chamber, respectively. A separation component is provided inside the separation chamber. The two ends of the air inlet pipe are connected to the temporary storage chamber and the process chamber, respectively, so as to introduce the gas-liquid mixture in the process chamber into the temporary storage chamber. A regulating chamber and a valve are provided between the temporary storage chamber and the separation chamber. The valve can slide along the regulating chamber to reduce or increase the pressure in the temporary storage chamber. When the valve is open, the temporary storage chamber is connected to the separation chamber, and when the valve is closed, the temporary storage chamber is isolated from the separation chamber. The operation of the vacuum pump reduces the pressure in the process chamber; When the pressure in the process chamber exceeds the preset value, the liquid medium in the process chamber exists in the form of droplets. When the valve opens, the separation component can separate the gas and droplets extracted from the process chamber. When the pressure in the process chamber is less than or equal to the preset value, the liquid medium in the process chamber exists in the form of droplets. The valve is closed first, and the gas and droplets extracted from the process chamber are stored in the temporary storage chamber. Then the valve slides along the regulating chamber to reduce the pressure in the temporary storage chamber. The droplet size is larger than the mist droplet size. The valve is equipped with a control mechanism, which is used to make the valve slide in the opposite direction along the regulating chamber and open the valve. The preset value is the critical value for flash evaporation of liquid media; The valve includes a valve cylinder and a valve core. The valve cylinder can slide along the regulating chamber to reduce or increase the pressure in the temporary storage chamber. The valve cylinder has a through hole for communicating between the temporary storage chamber and the separation chamber. The valve core can slide along the valve cylinder to block or open the through hole, thereby closing or opening the valve. The direction from the separation chamber to the temporary storage chamber within the regulating chamber is referred to as the first direction. An elastic element is provided within the regulating chamber, which applies a first elastic force along the first direction to the valve cylinder. A sliding cavity is formed within the valve cylinder along the first direction. The valve core has a piston slidably connected to the sliding cavity, and the sliding cavity is filled with gas. A blocking element is provided on the valve cylinder to apply a blocking force along the first direction to the piston. When the vacuum pump is running, the pressure of the separation chamber and the temporary storage chamber together exert a first force on the valve cylinder, and the first force is along a first direction. The pressure of the separation chamber and the sliding chamber together exert a second force on the valve core. When the pressure in the process chamber is greater than the preset value, the first force and the first elastic force balance the forces on the valve cylinder, and the valve cylinder remains stationary relative to the regulating chamber. At the same time, the second force and the resisting force balance the forces on the piston, and the valve core remains stationary relative to the valve cylinder, thus opening the valve. When the pressure in the process chamber is less than or equal to the preset value, the second force increases, and the piston drives the valve core to slide relative to the valve cylinder to close the valve. After the valve is closed, the first force increases, and the valve cylinder slides along the regulating chamber, thus reducing the pressure in the temporary storage chamber. When the pressure in the process chamber decreases to the target value, the control switch changes the first and second forces, causing the valve to slide in the opposite direction along the control chamber and open. The target value is less than the preset value.

2. The negative pressure water-gas separator according to claim 1, characterized in that, The control unit is a vacuum pump, and the sliding cavity is filled with gas at a constant pressure. When the pressure in the process cavity drops to the target value, the vacuum pump stops, and the pressure in the separation cavity increases so that the first and second forces are reversed. The valve cylinder first slides in the opposite direction along the control cavity to increase the pressure in the temporary storage cavity, and then the valve core slides in the opposite direction relative to the valve cylinder to open the valve.

3. The negative pressure water-gas separator according to claim 1, characterized in that, The adjustment control is used to adjust the pressure of the sliding cavity. When the pressure of the process cavity drops to the target value, the vacuum pump continues to run. The adjustment control makes the pressure of the sliding cavity lower than the pressure of the separation cavity, so that the second force is reversed. The valve core first slides in the opposite direction relative to the valve cylinder to open the valve. After the valve is opened, the first force decreases, and the valve cylinder slides in the opposite direction along the adjustment cavity.

4. The negative pressure water-gas separator according to claim 2, characterized in that, The sliding cavity is equipped with a first adjustment module, which is used to adjust the pressure of the sliding cavity.

5. The negative pressure water-gas separator according to claim 1, characterized in that, The intake pipe is provided with multiple baffles; the separation assembly includes multiple baffles evenly distributed along a second direction, which is the direction from the valve to the exhaust pipe. The plane where the baffles are located is perpendicular to the second direction. Adjacent baffles are staggered in a third direction, which is perpendicular to the second direction, so that all baffles form a flow path from the valve to the exhaust pipe and bend back and forth.

6. The negative pressure water-gas separator according to claim 5, characterized in that, The regulating chamber, valve, and flow passage are arranged symmetrically in two sets about the extraction pipe.

7. The negative pressure water-gas separator according to claim 1, characterized in that, The shell also contains a liquid storage chamber, which is located below the separation chamber and the two are connected. The bottom of the shell is provided with a drain port, the upper end of which is connected to the liquid storage chamber and the lower end is connected to an external liquid pumping assembly. The external liquid pumping assembly is used to drain the liquid in the liquid storage chamber. A liquid level tube is provided outside the shell, and both the upper and lower ends of the liquid level tube are connected to the liquid storage chamber.

8. The negative pressure water-gas separator according to claim 7, characterized in that, A sensor is installed inside the liquid level tube to detect the liquid level in the storage chamber. When the liquid level is greater than a first height value and less than a second height value, or when the liquid level is equal to the second height value, the external liquid pumping component is in the start state; when the liquid level is less than or equal to the first height value, the external liquid pumping component is in the stop state; the first height value is less than the second height value.

9. The negative pressure water-gas separator according to claim 8, characterized in that, The liquid level tube is equipped with a second adjustment module, which is used to adjust the magnitude of the first height value and the second height value.

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