Self-drainage buffer tank

Abstract

A tank body is provided with a liquid outlet and a liquid discharging device, the liquid discharging device comprises a liquid collecting assembly and a liquid discharging assembly, the liquid collecting assembly is arranged in the tank body, the liquid collecting assembly comprises a liquid collecting bottom plate used for collecting liquid, a liquid guiding hole is formed in the liquid collecting bottom plate, and the liquid discharging assembly comprises a water discharging cylinder, a piston and a power piece. The piston is in sliding fit with the water drainage cylinder, the power piece is used for driving the piston to reciprocate in the water drainage cylinder, a liquid collecting opening and a liquid drainage opening are formed in the water drainage cylinder, the liquid collecting opening is connected with the liquid guide hole, a liquid outlet connected with the liquid drainage opening is formed in the tank body, the liquid drainage opening is formed in the end of the liquid collecting cylinder, and a vent valve is arranged at the end of the liquid collecting cylinder and communicated with the tank body. When the piston moves towards the liquid discharge port, the piston seals the liquid collection port and drives liquid in the liquid collection cylinder to be discharged from the liquid discharge port, and when the piston moves away from the liquid discharge port, the vent valve is opened to drive the air pressure in the liquid collection cylinder to be equal to the air pressure in the tank body.

Description

Technical Field

[0001] The invention relates to the field of buffer tanks, and in particular to a self-draining buffer tank. Background Art

[0002] Buffer tanks are mainly used to buffer pressure fluctuations in various systems to make the systems work more smoothly. They are widely used in water supply equipment, gas supply equipment, chemical industry and other fields. In the prior art, the buffer tank includes a tank body, and an inlet valve, an outlet valve, a drain valve and a pressure control device arranged on the buffer tank body. The outlet valve of the buffer tank is generally connected to an oil vacuum pump, and the inlet valve is connected to a device with required negative pressure conditions. When the buffer tank is in working state, when the gas is vacuumed in real time, the gas sucked into the tank body will carry some water vapor. When the gas is drawn into the vacuum tank, the water vapor is prone to liquefaction and ice is separated from the gas and deposited at the bottom of the buffer tank. The drain valve is arranged at the bottom of the buffer tank, and the liquid at the bottom of the buffer tank can be discharged through the drain valve.

[0003] The problem in the existing application documents, such as the comparative document with application number CN110397737B, is that when the liquid level storage device in the comparative document needs to discharge the liquid, the storage tank needs to stop working. The reason is that when the floating ball is squeezed and deformed, the diversion hole will be blocked. The blocked diversion hole will cause the upper and lower parts of the diversion recessed plate to have a segmentation and sealing effect. The liquid gathered at the bottom of the tank after the segmentation and sealing of the diversion recessed plate will be discharged through the drain port, and the drain port is connected to the outside world. When the liquid is discharged, the bottom of the diversion recessed plate is in a normal pressure state. After closing the drain port, the fan-shaped diversion plate is driven downward by the contraction of the telescopic rod. At the same time, the floating ball will be discharged from the diversion hole under the action of its own gravity and the downward thrust of the elastic pull rope. Disengagement, at this time the guide port is in a connected state, the upper and lower parts of the guide recessed plate are in a connected state, and the air pressure originally located above the guide recessed plate is instantly supplemented by the air pressure below the guide recessed plate, causing the air pressure value in the buffer tank to change instantly, thus losing the original meaning of the buffer tank. In order to avoid accidents, the buffer tank needs to be closed during the drainage process, and the vacuum degree in the tank body is detected by a vacuum gauge, so that the tank body works repeatedly. The drainage work can only be achieved if the buffer tank needs to be closed. However, if the buffer tank needs to be closed to achieve drainage, the design of the guide recessed plate in this design scheme itself loses its meaning, because after closing the buffer tank, opening the drain valve itself can drain the water, so the buffer tank cannot be drained in the working state. Summary of the invention

[0004] The invention aims at the disadvantages of the prior art that the air blowing design and the power are combined to design the water in the tank body to be able to condense quickly, and provides a self-draining buffer tank.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions: a self-draining buffer tank, comprising a tank body, the tank body is provided with a liquid outlet, characterized in that the tank body is provided with a liquid discharge device, the liquid discharge device comprises a liquid collecting component and a liquid discharge component, the liquid collecting component is arranged in the tank body, the liquid collecting component comprises a liquid collecting bottom plate for collecting liquid, the liquid collecting bottom plate is provided with a liquid guide hole, the liquid discharge component comprises a drainage cylinder, a piston and a power piece, the piston is slidably matched with the drainage cylinder, and the power piece is used to drive the piston in the drainage cylinder Reciprocating motion, a liquid collecting port and a liquid discharge port are provided on the drainage cylinder, the liquid collecting port is connected to the liquid guide hole, the tank body is provided with a liquid outlet connected to the liquid discharge port, the liquid discharge port is arranged at the end of the liquid collecting cylinder, a vent valve is provided at the end of the liquid collecting cylinder, the vent valve is communicated with the tank body, when the piston moves toward the liquid discharge port, the piston forms a seal with the liquid collecting port and drives the liquid in the liquid collecting cylinder to be discharged from the liquid discharge port, when the piston moves away from the liquid discharge port, the vent valve opens to drive the air pressure in the liquid collecting cylinder to be equal to the air pressure in the tank body.

[0006] By adopting the above technical scheme, the liquid in the tank body is collected by the liquid collecting bottom plate after being deposited. When the piston moves in the direction away from the drain port and moves to the extreme position, the piston no longer forms a seal on the liquid collecting port. At this time, the liquid located above the liquid collecting bottom plate can enter the drain cylinder through the liquid guide hole and the liquid collecting port under the action of gravity. The power part drives the piston to reciprocate. When the piston moves toward the drain port, the piston forms a seal on the liquid collecting port, and the vent valve is in a closed state. The piston continues to move toward the drain port to discharge the liquid in the drain cylinder from the drain port. Then the piston moves away from the drain port again, and the vent valve opens, so that the air pressure in the drain cylinder remains the same as the air pressure in the tank body, thereby solving the technical problem of draining when the cache tank is in working condition.

[0007] The present invention is further configured as follows: the drainage assembly is provided with a plurality of drainage cylinders, each of the drainage cylinders is provided with a piston, the drainage assembly also includes a crankshaft and a plurality of connecting rods, the connecting rods are rotationally connected to the pistons, the connecting rods are rotationally connected to the crankshaft, and the crankshaft is controlled by the rotation of the power part.

[0008] By adopting the above technical solution, the technical problem solved is how to increase the drainage efficiency. The drainage efficiency is increased by increasing the number of drainage cylinders, and setting up multiple groups of drainage cylinders can also drive the drainage in the tank body to always be in a stable drainage state.

[0009] The present invention is further configured as follows: the liquid collecting bottom plate comprises a liquid conducting section and a bottom surface section, the liquid conducting section is arranged obliquely, a liquid collecting trough is arranged between the liquid conducting section and the bottom surface section, and the liquid conducting holes are all opened in the liquid collecting trough.

[0010] By adopting the above technical solution, the technical problem solved is how to increase the drainage efficiency. The design of the liquid guiding section and the liquid collecting trough increases the liquid guiding type, and gravity can be used to increase the liquid guiding efficiency of the liquid collecting bottom plate, thereby increasing the drainage efficiency.

[0011] The present invention is further configured as follows: the liquid collecting component further comprises a scraper plate, the scraper plate is arranged in close contact with the liquid collecting bottom plate, and the power member can drive the scraper plate to move along the surface of the liquid collecting bottom plate.

[0012] By adopting the above technical solution, the technical problem solved is how to increase the drainage efficiency, and the collection of liquid on the liquid collecting bottom plate can be accelerated by the scraper.

[0013] The present invention is further configured as follows: the buffer tank also includes a low-temperature chamber, the air inlet is connected to the low-temperature chamber, the low-temperature chamber is provided with a connecting hole communicating with the tank body, the low-temperature chamber is provided with an air intake cooling device, and the air intake cooling device is used to cool the low-temperature chamber.

[0014] By adopting the above technical solution, the technical problem solved is how to accelerate the condensation of water vapor in the gas entering the buffer tank. By setting an air intake cooling device with a cooling effect, the overall cooling of the low-temperature chamber is completed. When the temperature is lowered, the condensation speed of the gas water vapor entering the tank body is faster.

[0015] The present invention is further configured as follows: a central duct is provided in the low-temperature chamber, the central duct and the inner wall of the low-temperature chamber are spaced apart to form a circular columnar air guide cavity, the air inlet is connected to the air guide cavity, the central duct is provided with a spiral guide plate, the guide plate is arranged in the air guide cavity, the guide plate drives the gas entering the air guide cavity through the air inlet to rotate in a spiral shape, and the air intake cooling device can be set to cool the central duct.

[0016] By adopting the above technical solution, the technical problem solved is how to improve the condensation efficiency. By setting a central duct structure, an air guide cavity structure formed by the central duct and the inner wall of the condensation cavity, and setting a guide plate, the gas entering the air guide cavity is driven to rotate, thereby increasing the residence time of the gas in the low-temperature chamber. When the central duct is cooled by the air intake cooling device, the condensation efficiency is further increased. Since the gas in the air guide cavity is in a spiral rotating state, the gas forms a centrifugal force, which further increases the liquefaction efficiency of the water vapor in the gas, and also allows small particles of impurities in the gas to be thrown to the inner wall of the low-temperature chamber through the centrifugal force, which can greatly reduce the impurities entering the buffer tank and prevent the impurities from falling on the liquid collecting bottom plate and causing congestion in the liquid collecting port.

[0017] The present invention is further configured as follows: the low-temperature chamber is provided with an air inlet chamber, the air inlet is connected to the air inlet chamber, the power component adopts a wind wheel structure, the power component is arranged in the air inlet chamber and the air inlet is arranged relatively.

[0018] By adopting the above technical solution, the technical problem solved is the setting of the power part. The power part adopts a wind wheel structure. The function of the wind wheel structure is to use the airflow entering the buffer tank to drive the wind wheel to rotate. The rotation of the wind wheel drives the piston to move through the transmission assembly, and the piston moves relative to the drainage cylinder, thereby completing the drainage operation.

[0019] The present invention is further configured as follows: the power member is provided with a transmission assembly for transmitting the power of the power member, the transmission assembly adopts a gear reduction group structure, the power transmission assembly is provided with an input shaft and an output shaft, the input shaft is connected to the power member, and the output shaft drives the piston to move.

[0020] By adopting the above technical solution, the technical problem solved is how to realize the transmission component. By using the existing transmission shaft in conjunction with the gear reduction group mode, not only the problem of transmission distance is solved, but also the maximum torque of the output shaft is increased through the gear reduction group, thereby driving several pistons to move synchronously.

[0021] The present invention is further configured as follows: the intake air cooling device includes a refrigeration compressor, a condenser, a throttle valve and an evaporator, the evaporator is provided with a loop pipeline, and the loop pipeline is arranged in the low-temperature cabin and the liquid collecting bottom plate.

[0022] By adopting the above technical solution, after being cooled by the evaporator through the loop pipeline, the low-temperature chamber and the liquid collecting bottom plate opposite to the evaporator are cooled, so that double cooling can be achieved to accelerate condensation.

[0023] The present invention is further configured as follows: a first filter screen is provided in the low-temperature chamber, and a second filter screen is provided in the liquid guide hole.

[0024] By adopting the above technical solution, the filter screen is used to filter impurities in the incoming gas to avoid congestion in the liquid collecting port or the liquid guiding pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a sectional view of a tank body in an embodiment;

[0026] Figure 2 is a cross-sectional view of a cryogenic chamber in an embodiment;

[0027] Figure 3 2 is a schematic diagram of the structure of the liquid discharge device in the embodiment;

[0028] Figure 4 yes Figure 3 The enlarged schematic diagram at A in the middle;

[0029] Figure 5 It is an overall cross-sectional view of the buffer tank.

[0030] The parts indicated by the numbers in the above drawings are as follows: 1. tank body; 11. connecting hole; 12. air outlet; 13. liquid outlet; 2. liquid discharge device; 21. liquid collecting assembly; 211. liquid collecting bottom plate; 2111. liquid guiding section; 2112. bottom surface section; 212. liquid scraping plate; 213. liquid collecting tank; 214. liquid guiding hole; 215. second filter screen; 216. liquid scraping short rod; 217. active liquid discharge hole; 22. liquid discharge assembly; 221. drainage cylinder; 2 22. Piston; 223. Crankshaft; 2231. Rotating section 1; 2232. Crank section; 2233. Rotating section 2; 224. Connecting rod; 225. Power member; 226. Pivot plate; 227. Liquid collecting port; 228. Liquid drain port; 229. Vent; 3. Low temperature chamber; 31. Air inlet chamber; 32. Air inlet; 33. Cover; 34. Central duct; 35. Guide plate; 36. First filter screen; 37. Liquid guide tube; 4. Transmission assembly; 41. Transmission shaft. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] Example:

[0033] A self-draining buffer tank, see first Figure 1 , including a tank body 1, a drainage device 2 arranged in the tank body 1, a low-temperature chamber 3 and an air intake cooling device arranged in the low-temperature chamber 3. The low-temperature chamber 3 is arranged in the tank body 1, but it is not limited to the low-temperature chamber 3 being only arranged in the tank body 1, and it can also be arranged outside the tank body 1. The low-temperature chamber 3 is provided with a connecting hole 11 that communicates with the tank body 1, an air outlet 12 is provided on the side of the tank body 1, and a liquid outlet 13 for drainage is provided at the bottom of the tank body 1.

[0034] See also Figure 2The cryogenic chamber 3 is a long cylindrical cavity structure and is arranged perpendicular to the ground. The cryogenic chamber 3 is welded to the inner wall of the tank body 1. An air inlet chamber 31 is arranged at the upper end of the cryogenic chamber 3. An air inlet 32 ​​is opened on the air inlet chamber 31. The air inlet 32 ​​is tubular and one end is arranged outside the tank body 1. The other end of the air inlet 32 ​​is arranged to be connected with the air inlet chamber 31. The air inlet chamber 31 is provided with a vent hole, which is connected with the upper end of the cryogenic chamber 3. The lower end of the cryogenic chamber 3 is open and threadedly connected with a cover 33. The cover 33 is located at the center of one end of the cryogenic chamber and is clamped with a central conduit 34. The side of the cover 33 is stepped and includes a large diameter The stepped surfaces of the two are sealed and abutted against the end of the cryogenic chamber 3. The small diameter of the cover 33 is located in the cryogenic chamber 3 and is threadedly connected to the cryogenic chamber 3. In this embodiment, the cover 33 and the cryogenic chamber 3 are threadedly connected. The cover 33 and the inner wall of the cryogenic chamber 3 are both provided with threads for threaded connection, but are not limited to threaded connection and can also be fixedly connected by welding or other methods. The central conduit 34 is located in the cryogenic chamber 3 and is in a circular tubular shape and is concentrically arranged with the inner wall of the cryogenic chamber 3. The outer wall of the central conduit 34 is spaced apart from the inner wall of the cryogenic chamber 3. The central conduit 34 and the inner wall of the cryogenic chamber 3 are spaced apart to form a circular columnar gas guide cavity structure. The central A guide plate 35 is convexly arranged on the outer surface of the conduit 34 and toward one end of the air inlet chamber 31. The guide plate 35 is spirally extended toward one end of the central conduit 34 toward the cover 33. The guide plate 35 is spaced apart from the inner wall of the cryogenic chamber 3. The advantage of this spacing is that when the moisture and solid impurities in the gas are thrown to the inner wall of the cryogenic chamber 3 due to the spiral centrifugal force, the liquid and solid impurities can flow downward directly under the action of gravity without being affected by the guide plate 35. The connecting hole of the air inlet chamber 31 is arranged opposite to the guide plate 35. Through the spiral design of the guide plate 35, the gas entering the air guide cavity is driven to spiral downward. state, thereby increasing the residence time of the gas in the cryogenic chamber 3. The centrifugal force generated by the spiral airflow further increases the liquefaction efficiency of the water vapor in the gas, and also causes the small particle impurities in the gas to be thrown to the inner wall of the cryogenic chamber 3 by the centrifugal force. The impurities settle toward the lower part of the cryogenic chamber 3 under the action of gravity. The cover 33 located at the bottom of the cryogenic chamber 3 is provided with a liquid guide pipe 37, which can be arranged opposite to the drainage device 2. A first filter screen 36 is provided between the liquid guide pipe 37 and the gas guide cavity. The centrifugal force of the rotating airflow itself and the provision of the first filter screen 36 can greatly reduce the impurities entering the buffer tank.

[0035] The air intake cooling device adopts the existing refrigeration system, including a refrigeration compressor, a condenser, a throttle valve and an evaporator. The evaporator is provided with a loop pipe. The low-temperature cabin 3 adopts a double-layer cavity structure. The inner layer or the double layer of the low-temperature cabin 3 is a metal structure. The loop pipe set in the evaporator is located in the interlayer of the low-temperature cabin 3. The refrigeration compressor, condenser and throttle valve are all arranged outside the tank body 1. The loop pipe connected by the evaporator is bonded to the inner layer or the inner and outer layers of the low-temperature cabin 3 at the same time, so as to cool the inner wall of the low-temperature cabin 3. The central duct 34 also adopts a metal material with good thermal conductivity. The loop pipe part extends to the liquid collecting bottom plate 211 of the liquid collecting component 21 described below, and part of the loop pipe is arranged in contact with the lower side of the liquid collecting bottom plate 211. The refrigeration system can also cool the liquid collecting bottom plate 211 described below.

[0036] See also Figure 1 and Figure 3 The liquid discharge device 2 is arranged at the bottom of the inner side of the tank body 1, and the liquid discharge device 2 includes a liquid collecting component 21 and a liquid discharge component 22. The bottom of the low-temperature chamber 3 and the inner bottom of the tank body 1 are arranged at an interval, and the liquid collecting component 21 is arranged between the low-temperature chamber 3 and the inner bottom of the tank body 1. The liquid collecting component 21 includes a liquid collecting bottom plate 211 and a scraper plate 212 attached to the liquid collecting bottom plate 211. The liquid collecting bottom plate 211 includes a liquid guiding section 2111 and a bottom surface section 2112. The liquid collecting bottom plate 211 is funnel-shaped, and the bottom surface section 2112 is circular and flat. The liquid guiding section 2111 is annularly arranged around the outer ring of the bottom surface section 2112, and the liquid guiding section 2111 is inclined. The annular outer ring of the liquid guiding section 2111 is inclined relative to the bottom surface section 2112 away from the bottom surface of the tank body 1. The inclination angle is 10-15 degrees, and the liquid guiding section 211 The outer ring of 1 is arranged in contact with the inner wall of the tank body 1, and the condensed liquid in the low-temperature chamber 3 and the condensed liquid in the tank body 1 can drip onto the liquid collecting bottom plate 211 and be collected by the liquid collecting bottom plate 211. A circle of liquid collecting grooves 213 is arranged between the liquid guiding section 2111 and the bottom surface section 2112, and a plurality of liquid guiding holes 214 are opened at the bottom of the liquid collecting groove 213. A second filter net 215 is fixedly connected to the liquid guiding hole 214. The second filter net 215 has the same function as the first filter net 36 and both are used to intercept impurities to avoid congestion of the drainage component 22. An active drainage hole 217 is also opened in the liquid collecting groove 213, and the active drainage hole 217 is connected to an active drainage valve. When the drainage efficiency of the drainage component 22 is lower than the liquid generation speed, the exhaust active drainage valve can discharge the liquid in the liquid collecting groove 213 through the active drainage hole 217.

[0037] See also Figure 4The drainage assembly 22 includes a drainage cylinder 221, a piston 222, a crankshaft 223, a connecting rod 224 and a power piece 225. The drainage cylinder 221, the piston 222 and the connecting rod 224 are all provided with a plurality of them. A piston 222 is slidably fitted in each of the drainage cylinders 221, and each piston 222 is fitted with a connecting rod 224. One end of the connecting rod 224 is pivotally connected to the piston 222. The crankshaft 223 includes a rotating section 1 2231, a crank section 2232 and a rotating section 2233. A bearing seat is fixedly connected to the bottom surface of the tank body 1. The rotating section 1 2231 is matched with the inner ring of the bearing seat on the bottom surface of the tank body 1. A center hole is opened at the center of the bottom surface section 2112 of the liquid collecting bottom plate 211. The bearing seat is fixedly connected in the center hole. The rotating section 2233 is connected to the center of the bottom surface section 2112. The bearing seat is rotatably matched, and the rotating section 2233 extends out of the bearing seat, a plurality of drain cylinders 221 are arranged in a ring array, the piston 222 is sealed and slidably matched with the inner wall of the drain cylinder 221, the central axis of the crank section 2232 is parallel and staggered with the central axis of the rotating section 1 2231, the central axes of the rotating section 1 2231 and the rotating section 2 2233 are coincident, and a pivot plate 226 is rotatably connected to the crank section 2232, and the pivot plate 226 is polygonally arranged, one of the connecting rods 224 is integrally formed with the pivot plate 226 at one end away from the piston 222, and the other plurality of connecting rods 224 are pivotally connected with the pivot plate 226 at one end away from the piston 222. When the crankshaft 223 rotates, all the pistons 222 can be driven to reciprocate in the drain cylinder 221.

[0038] See also Figure 4The drain cylinder 221 is a cylindrical cavity structure with an opening at one end, the piston 222 is cylindrical, the side of the piston 222 is slidably matched with the inner wall of the drain cylinder 221, a plurality of sealing rings are arranged on the cylindrical side of the piston 222, the central axis of the drain cylinder 221 is arranged parallel to the ground, the upper end surface of the drain cylinder 221 away from the bottom surface of the tank body 1 is provided with a liquid collecting port 227, the liquid collecting port 227 is connected with the liquid guide hole 214, the drain cylinder 221 is provided with a liquid discharge port 228 at the end away from the opening, the liquid discharge port 228 is provided with a one-way valve, the one-way valve can only be used to discharge the water in the drain cylinder 221, the liquid discharge port 228 is provided with a pipeline connected with the liquid outlet 13, when the piston 222 moves to the end farthest from the liquid discharge port 228, the liquid collection port 227 is connected with the drain cylinder 221, at this time the liquid in the liquid collecting tank 213 enters through the liquid guide hole 214 In the drainage cylinder 221, when the piston 222 moves toward the drainage port 228, the side wall of the piston 222 forms a seal on the liquid collecting port 227. At this time, the piston 222 still moves toward the drainage port 228, which can drive the liquid in the piston 222 to be discharged from the drainage port 228 and then discharged from the tank body 1 through the liquid outlet 13. The liquid outlet 13 is provided with a one-way valve, and a vent 229 is also provided at the end of the liquid collecting pipe. The vent 229 is threadedly connected with a vent valve, which also adopts a one-way valve. When the piston 222 abuts against the end of the drainage cylinder 221 away from the opening, the drainable liquid in the drainage cylinder 221 is discharged. At this time, the piston 222 abuts against the end of the drainage cylinder 221 toward the opening. At this time, the vent valve is opened to drive the air pressure in the tank body 1 to be equal to the air pressure in the drainage cylinder 221, thereby facilitating the pulling of the piston 222.

[0039] See also Figure 3 The part of the rotating section 2233 extending out of the liquid collecting bottom plate 211 is sleeved with a scraper short rod 216, the inner circle of the scraper short rod 216 is keyed to the outer side of the rotating section 2233, the scraper short rod 216 is arranged parallel to the bottom surface section 2112, the scraper plate 212 is pivoted to the end of the short rod away from the crankshaft 223, and a torsion spring is arranged at the pivot point, which can drive the scraper plate 212 to always abut against the liquid guiding section 2111, the scraper plate 212 and the crankshaft 223 are arranged to rotate synchronously, and a rubber brush piece is arranged on the scraper plate 212, which abuts against the liquid collecting bottom plate 211, and is used to scrape the condensed droplets on the liquid collecting bottom plate 211 into the liquid collecting tank 213, thereby accelerating the collection of liquid on the scraper plate 212.

[0040] See also Figure 2 and Figure 5The power piece 225 adopts a wind wheel structure. In this embodiment, the power piece 225 is arranged in the air intake cabin 31. The power piece 225 can also be arranged outside the low-temperature cabin 3 and is arranged opposite to the connecting hole 11 of the low-temperature cabin 3. In this embodiment, the power piece 225 is arranged in the air intake cabin 31 and is opposite to the air inlet 32. The air inlet 32 ​​is relatively arranged to one side relative to the non-center of the power piece 225. This arrangement can drive the power piece 225 to rotate in one direction. When the gas enters the tank body 1 through the air inlet 32, the air intake cabin 31, the low-temperature cabin 3 and the connecting hole 11 in sequence, the gas through the air intake cabin 31 forms a force on the power piece 225. The power piece 225 of the wind wheel structure is provided with an optical axis, and the air intake cabin 31 is provided with a through hole for the optical axis to pass through and be rotatably matched. The through hole is installed with a bearing seat matched with the optical axis. The bearing seat is used to limit the axial movement of the power piece 225. The power piece 22 A transmission assembly 4 is connected between 5 and the crankshaft 223. The transmission assembly 4 adopts a reduction gear set. The reduction gear set adopts the existing technology and includes a gear reduction box, a gear set arranged in the gear reduction box, an input shaft and an output shaft connected to the gear set. The power piece 225 is keyed to the input shaft of the gear reduction set. The crank that drives the piston 222 to move is connected to the output shaft through a coupling. The high-speed and low-torque of the high-speed power piece 225 is driven by the transmission assembly 4 to become a low-speed and high-torque output shaft. The output shaft of the transmission assembly 4 is connected to the transmission shaft 41 through a coupling. The other end of the transmission shaft 41 is connected to the part of the rotating section 2233 extending out of the liquid collecting bottom plate through a coupling, so that the output shaft drives the crankshaft 223 to move, and the crankshaft 223 drives the scraper plate 212 to make a circumferential motion and the piston 222 to reciprocate. A mounting plate for mounting the reduction gear set is arranged at the upper position on the inner side of the tank body 1.

[0041] When the buffer tank is in working state, the vacuum pump is connected with the gas outlet 12 of the tank body 1 to ensure that the tank body 1 is in a state of constant negative pressure. The gas inlet 32 ​​of the tank body 1 is connected with the corresponding working component. When the gas enters the gas inlet 32 ​​of the tank body 1, since the gas may contain water vapor, the gas containing water vapor first enters the low temperature chamber 3. The gas entering the low temperature chamber 3 is cooled by the air intake cooling device and finally condenses, so that the gas entering the tank body 1 is cooled. After the gas is cooled, the gas is cooled by the entrained water vapor and condenses. The liquid condensed in the cabin 3 passes through the first filter screen 36 and the liquid guide tube 37, and is collected by the liquid collecting bottom plate 211. The liquid collecting bottom plate 211 is provided with a scraper plate 212. The scraper plate 212 collects the liquid condensed on the surface of the liquid collecting bottom plate 211 and scrapes it into the liquid collecting tank 213. The liquid in the liquid collecting tank 213 enters the drainage cylinder 221 through the liquid collecting port 227. The liquid in the drainage cylinder 221 is discharged from the drainage port 228 through the piston 222. The drainage port 228 is connected to the liquid outlet 13 through a pipeline, thereby completing the discharge of the liquid in the buffer tank.

Claims

1. A self-draining buffer tank, comprising a tank body (1), wherein the tank body (1) is provided with a liquid outlet (13), characterized in that: The tank body (1) is provided with a liquid discharge device (2), the liquid discharge device (2) comprising a liquid collecting component (21) and a liquid discharge component (22), the liquid collecting component (21) being arranged in the tank body (1), the liquid collecting component (21) comprising a liquid collecting bottom plate (211) for collecting liquid, the liquid collecting bottom plate (211) being provided with a liquid guide hole (214), the liquid discharge component (22) comprising a drainage cylinder (221), a piston (222) and a power member (225), the piston (222) being slidably matched with the drainage cylinder (221), the power member (225) being used to drive the piston (222) to reciprocate in the drainage cylinder (221), and the drainage cylinder (221) being provided with a liquid collecting port (227) and a liquid discharge port (228), the liquid collecting port (227) being connected to the liquid guide hole (214), the tank body (1) being provided with a liquid outlet (13) connected to the liquid discharge port (228), the liquid discharge port (228) being arranged at the end of the liquid collecting cylinder, the end of the liquid collecting cylinder being provided with a vent valve, the vent valve being communicated with the tank body (1), when the piston (222) moves toward the liquid discharge port (228), the piston (222) forms a seal with the liquid collecting port (227) and drives the liquid in the liquid collecting cylinder to be discharged from the liquid discharge port (228), when the piston (222) moves away from the liquid discharge port (228), the vent valve is opened to drive the air pressure in the liquid collecting cylinder to be equal to the air pressure in the tank body (1).

2. A self-draining buffer tank according to claim 1, characterized in that: The drainage assembly (22) is provided with a plurality of drainage cylinders (221), each of which is provided with a piston (222). The drainage assembly (222) further comprises a crankshaft (223) and a plurality of connecting rods (224), wherein the connecting rods (224) are rotationally connected to the pistons (222), the connecting rods (224) are rotationally connected to the crankshaft (223), and the crankshaft (223) is controlled to rotate by a power member (225).

3. A self-draining buffer tank according to claim 2, characterized in that: The liquid collecting bottom plate (211) comprises a liquid conducting section (2111) and a bottom surface section (2112); the liquid conducting section (2111) is arranged in an inclined manner; a liquid collecting groove (213) is arranged between the liquid conducting section (2111) and the bottom surface section (2112); and the liquid conducting holes (214) are all opened in the liquid collecting groove (213).

4. A self-draining buffer tank according to claim 1, characterized in that: The liquid collection assembly (21) further comprises a liquid scraping plate (212), wherein the liquid scraping plate (212) is arranged in close contact with the liquid collection bottom plate (211), and the power member (225) can drive the liquid scraping plate (212) to move along the surface of the liquid collection bottom plate (211).

5. A self-draining buffer tank according to claim 1, characterized in that: The buffer tank further comprises a low-temperature chamber (3), the air inlet (32) being in communication with the low-temperature chamber (3), the low-temperature chamber (3) being provided with a connecting hole (11) in communication with the tank body (1), and an air intake cooling device being arranged in the low-temperature chamber (3), the air intake cooling device being used for cooling the low-temperature chamber (3).

6. A self-draining buffer tank according to claim 5, characterized in that: The low-temperature chamber (3) is provided with a central conduit (34), the central conduit (34) and the inner wall of the low-temperature chamber (3) are spaced apart to form a circular columnar gas guide cavity, the air inlet (32) is connected to the gas guide cavity, the central conduit (34) is provided with a spiral guide plate (35), the guide plate (35) is arranged in the gas guide cavity, the guide plate (35) drives the gas entering the gas guide cavity through the air inlet (32) to rotate in a spiral shape, and the air intake cooling device can be set to cool the central conduit (34).

7. A self-draining buffer tank according to claim 1 or 5, characterized in that: The low-temperature chamber (3) is provided with an air inlet chamber (31), an air inlet (32) is arranged in communication with the air inlet chamber (31), the power component (225) adopts a wind wheel structure, the power component (225) is arranged in the air inlet chamber (31) and the air inlet (32) is arranged opposite to each other.

8. A self-draining buffer tank according to claim 7, characterized in that: The power member (225) is provided with a transmission assembly (4) for transmitting the power of the power member (225); the transmission assembly (4) adopts a gear reduction group structure; the transmission assembly (4) is provided with an input shaft and an output shaft; the input shaft is connected to the power member (225); and the output shaft drives the piston (222) to move.

9. A self-draining buffer tank according to claim 5, characterized in that: The intake air cooling device comprises a refrigeration compressor, a condenser, a throttle valve and an evaporator. The evaporator is provided with a loop pipeline, and the loop pipeline is arranged in the low-temperature chamber (3) and the liquid collecting bottom plate (211).

10. A self-draining buffer tank according to claim 1, characterized in that: A first filter screen (36) is provided in the low-temperature chamber (3), and a second filter screen (215) is provided in the liquid guide hole (214).

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