A steam jet vacuum system and method

Abstract

This invention discloses a steam jet vacuum system and method, aiming to provide a steam jet vacuum system and method that can prevent nozzle deviation and deformation, facilitate nozzle correction and maintenance, reduce noise, and improve working performance, vacuuming effect, and working efficiency. It includes a driving steam pipe, an ejector fluid pipe, a jet structure, and a condenser. The jet structure includes a shell, within which a receiving chamber, a mixing chamber, and a diffuser are sequentially arranged. A driving steam inlet pipe and an ejector fluid inlet pipe are inserted into the shell. A nozzle is connected to the inlet of the driving steam inlet pipe, which is connected to the driving steam pipe. The diffuser has an ejector outlet and an ejector inlet. The condenser has a condenser inlet and a condenser outlet. The ejector outlet is connected to the condenser inlet, and the condenser outlet is connected to the ejector inlet. The beneficial effect of this invention is that it facilitates nozzle correction and maintenance.

Description

Technical Field

[0001] This invention relates to the field of ejector technology, and more particularly to a steam jet vacuum system and method. Background Technology

[0002] The steam ejector vacuum system utilizes the gas dynamics principle of the mutual conversion of static pressure energy and kinetic energy during fluid flow to create a vacuum. When water vapor with a certain pressure passes through the nozzle, it reaches the speed of sound. When it reaches the diffuser of the nozzle, all the static pressure energy is converted into kinetic energy, and a vacuum is formed at the nozzle. The gas being pumped is drawn into the receiving chamber under the action of pressure difference. At the same time, the velocity of the mixed gas gradually decreases, and the pressure increases accordingly as it is discharged from the diffuser. If a condenser is added and connected between the ejectors to condense the steam, an even higher degree of vacuum can be obtained, forming a steam ejector vacuum system.

[0003] Chinese Patent Announcement No.: CN 204299982 U, Announcement Date: April 29, 2015. This utility model discloses a steam jet vacuum pump. The key technical points of the pump include a steam booster ejector, a spray condenser, and an elbow. The steam booster ejector and the spray condenser are connected by the elbow. One end of the elbow is the inlet, and the other end is the outlet. The elbow includes an inner bend and an outer bend. The outer bend has a guide channel, and one end of the guide channel has an open diversion port located at the inlet end. The inner wall of the outer bend protrudes outward to form a guide plate for guiding part of the mixed fluid into the diversion port. The inner wall of the outer bend has a cleaning hole communicating with the guide channel. The cleaning hole is located at the outlet end and is parallel to the outlet. The shortcomings of this technical solution are that during the vacuuming process, due to the extremely high velocity of the jet steam, pressure energy is converted into velocity energy. However, the long-term high-pressure and high-speed airflow ejected from the nozzle causes the nozzle to deviate and deform, resulting in strong airflow noise. At the same time, the working performance is reduced, which reduces the vacuuming effect. In addition, the nozzle shape and position need to be disassembled, maintained and corrected, which reduces the connection effect between the ejector and the condenser and affects the working efficiency.

[0004] In summary, nozzles are prone to deviation and deformation, are difficult to maintain, generate strong airflow noise, and have reduced performance, which decreases the vacuuming effect and affects work efficiency. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of existing technologies, such as nozzle deviation, deformation, and maintenance difficulties, which lead to strong airflow noise, reduced working performance, decreased vacuuming effect, and reduced working efficiency. It provides a steam jet vacuum system and method that can prevent nozzle deviation and deformation, facilitate nozzle correction and maintenance, reduce noise, and improve working performance, vacuuming effect, and working efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A steam jet vacuum system includes a driving steam pipe, an ejector fluid pipe, a jetting structure, and a condenser. The jetting structure includes a shell, within which a receiving chamber, a mixing chamber, and a diffuser are sequentially arranged. A driving steam inlet pipe and an ejector fluid inlet pipe are inserted into the shell. The inlet of the driving steam inlet pipe faces the opening of the receiving chamber, and the inlet of the ejector fluid inlet pipe is positioned between the opening of the receiving chamber and the inlet of the driving steam inlet pipe. A nozzle is connected to the inlet of the driving steam inlet pipe, which is connected to the driving steam pipe. The diffuser has an ejector outlet and an ejector inlet. The condenser has a condenser inlet and a condenser outlet. The ejector outlet is connected to the condenser inlet, and the condenser outlet is connected to the ejector inlet.

[0008] The casing is arranged from head to tail in the direction of airflow, comprising a receiving chamber, a mixing chamber, and a diffuser chamber. High-pressure steam is connected to the driving steam inlet pipe, while low-pressure steam is connected to the ejector fluid inlet pipe. Both are ejected from the nozzle at a high velocity into the receiving chamber, triggering the ejection effect. The low-pressure steam enters the receiving chamber through the ejector fluid inlet pipe and follows the high-pressure driving steam into the mixing chamber. During this process, some of the driving steam's kinetic energy is transferred to the ejector fluid, forming a mixed fluid that enters the diffuser chamber and is then ejected again. The nozzle of the driving steam inlet pipe is connected to the receiving chamber. The injection structure introduces high-pressure steam through the driving steam pipe, and the gas to be pumped is introduced through the ejector fluid inlet pipe. The high-pressure steam and the gas to be pumped become a mixed gas and pass through the receiving chamber, mixing chamber and diffuser chamber in sequence. It then enters the condenser through the injection outlet and condenser inlet. The mixed gas is cooled to form condensate and non-condensable gas. The condenser discharges the non-condensable gas into the atmosphere through the exhaust pipe through the condensate outlet, thereby obtaining a higher vacuum. During this process, the nozzle will deviate and deform in the high-pressure environment. The correction structure is used to correct this to reduce the working environment noise of the steam injection vacuum system during vacuuming, thereby improving the working performance and efficiency.

[0009] Preferably, there are multiple injection structures and condensers, with the same number of injection structures and condensers. The injection structures and condensers are connected in a multi-stage series connection, with the condensers placed after the injection structures. The multi-stage series combination of injection structures and condensers starts with the injection structure at the beginning and ends with the condenser at the end. The injection structure in the middle introduces high-pressure steam through a driving steam pipe. At the same time, the injection inlet allows the non-condensable gas from the previous condenser to enter through the condenser outlet and mix with the high-pressure steam on the middle injection structure to form a mixed gas. The multi-stage steam ejector system can achieve a higher vacuum degree than the previous single-stage ejector system.

[0010] Preferably, a regulating valve is connected to the steam pipeline. The regulating valve can adjust the pressure of the steam, achieving a flexible adjustment effect when high-pressure steam is input.

[0011] Preferably, the housing is provided with a correction structure, which includes a collar and a correction block. The collar is rotatably connected to the housing, and a push rod is inserted into the collar. One side of the correction block is movably connected to the push rod, and the other side of the correction block is opposite to the nozzle and its shape is adapted to the nozzle. The nozzle is connected to the inlet of the driving steam inlet pipe and is opposite to the receiving chamber. The housing is provided with a collar that rotates on the housing. A push rod is inserted into the collar, with one end outside the housing and the other end inside the housing. The inner end of the push rod is connected to the correction block, so that the distance between the nozzle and the correction block can be moved by the push rod. At the same time, the correction block can rotate with the rotation of the collar. The side shape of the correction block opposite to the nozzle is the same as the shape of the nozzle. When the correction block is in contact with the nozzle and rotates, it plays a corrective and stabilizing role for deformed or misaligned nozzles, thereby reducing noise and improving working performance and efficiency.

[0012] Preferably, the housing includes a first housing and a second housing. One side of the first housing is attached to the side of the second housing, and the other side of the second housing is attached to the side of the third housing. A limiting ring one is fitted onto the first housing, and a limiting ring two is fitted onto the second housing. A fixing ring one and a fixing ring two are connected to the limiting ring one. The fixing ring one is engaged with the first housing, and the fixing ring two is engaged with the collar. A fixing ring three and a fixing ring four are connected to the limiting ring two. The fixing ring three is engaged with the second housing, and the fixing ring four is engaged with the collar. The collar is placed between the first housing and the second housing. The inner wall of the limiting ring one is connected to the fixing ring one and the fixing ring two. The fixing ring one is embedded in the first housing, and the fixing ring two is embedded in one side of the collar. The inner wall of the limiting ring two is connected to the fixing ring three and the fixing ring four. The fixing ring three is embedded in the second housing, and the fixing ring four is embedded in the other side of the collar. This ensures that the collar is stably connected to the housing and can rotate stably, thereby improving the structural stability.

[0013] Preferably, the collar has a through hole with an internal thread, and the push rod has an external thread, with the push rod threadedly connected to the through hole. This threaded connection allows the push rod to be stably connected to the straightening block, while also facilitating adjustment of the push rod's position and making it easy to fix, thus achieving a convenient user experience.

[0014] Preferably, the push rod is equipped with a rotating block, which is connected to the end of the push rod that is outside the housing. The rotating block is prism-shaped and has a larger cross-sectional area than the push rod to increase the friction during push rod rotation and facilitate smoother rotation.

[0015] Preferably, the straightening block has a rotating groove, and the push rod is connected to a rotating block. The rotating block is engaged with the rotating groove, and the push rod is rotatably connected to the rotating groove. The rotating groove is T-shaped on the side of the straightening block facing the collar. The push rod is connected to the rotating block, and the cross-sectional shape of the connection between the push rod and the rotating block is T-shaped. Thus, the push rod is rotatably connected to the rotating groove through the rotating block, which facilitates the stability of the straightening block when the push rod rotates and facilitates the fit between the straightening block and the nozzle, thereby improving the smoothness and stability of the structural connection.

[0016] Preferably, the first housing has a limiting groove, a limiting ring is embedded in the limiting groove, several through holes are on the bottom of the limiting groove, and a fixing rod is connected to the limiting ring. The fixing rod passes through the through holes and abuts against the driving steam inlet pipe. The limiting groove is an annular recess on the surface of the first housing. The limiting ring is embedded in the limiting groove, and the inner wall of the limiting ring is connected to one end of the fixing rod. The other end of the fixing rod passes through the through holes of the limiting groove and abuts against the outer surface of the driving steam inlet pipe. This arrangement of several fixing rods around the driving steam inlet pipe provides stability to the driving steam inlet pipe, thereby stabilizing the position of the nozzle and preventing the nozzle from deviating under high pressure and high speed.

[0017] A method for using a steam jet vacuum system specifically includes the following steps:

[0018] Step 1: Set the pressure of the high-pressure steam using the regulating valve. The jet structure at the head end introduces high-pressure steam through the driving steam pipe. The nozzle ejects the high-pressure steam and drives the ejector fluid inlet pipe to introduce the gas being drawn in through the ejector fluid pipe.

[0019] Step 2: The high-pressure steam and the extracted gas become a mixed gas and pass sequentially through the receiving chamber, mixing chamber, and diffuser chamber;

[0020] Step 3: The mixed gas enters the condenser through the jet outlet and the condenser inlet, where it is cooled to form condensate and non-condensable gas.

[0021] Step 4: The central jet structure introduces high-pressure steam through the driving steam pipe. At the same time, the jet inlet allows the non-condensable gas from the previous condenser to enter through the condenser outlet and mix with the high-pressure steam on this jet structure to become a mixed gas.

[0022] Step 5: The jet structure at the tail end introduces high-pressure steam through the driving steam pipe. At the same time, the jet inlet allows the non-condensable gas from the previous condenser to enter through the condenser outlet and mix with the high-pressure steam on this jet structure to form a mixed gas. The mixed gas then enters the tail end condenser through the jet outlet and the condenser inlet. The tail end condenser discharges the non-condensable gas into the atmosphere through the exhaust pipe via the condenser outlet.

[0023] Step Six: Correcting the spray structure: Hold the rotating block and rotate the push rod. Each correction block rotates the same distance and is attached to the outer surface of the nozzle to perform initial correction of the nozzle. Rotate the collar to make the correction blocks rotate against the nozzle to perform secondary correction of the nozzle.

[0024] The first jet structure is connected to the first condenser before the first condenser. The first condenser receives the steam and the pumped gas from the first jet structure and mixes them to form a mixed gas. The first condenser sends the non-condensable gas to the second jet structure, where it is gently cooled with the high-pressure steam to form condensate and more non-condensable gas. This cycle continues until the next condenser discharges the non-condensable gas into the atmosphere, achieving a high vacuum effect. When maintaining and correcting the nozzle, hold the rotating block and rotate the push rod to push the correction block close to the nozzle until it is tightly fitted. Each correction block rotates the same distance and is attached to the outer surface of the nozzle for initial correction. Then, rotate the collar to rotate the correction block against the nozzle for secondary correction, ensuring the nozzle is in position to release high-pressure steam, reducing noise and improving work efficiency.

[0025] The beneficial effects of this invention are: it can achieve a high degree of vacuum, which can correct and stabilize deformed or misaligned nozzles, thereby reducing noise, improving working performance and efficiency, and providing high structural stability, smooth operation and convenience. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention;

[0027] Figure 2 It is a 3D diagram of the jet structure;

[0028] Figure 3 yes Figure 2 Side view;

[0029] Figure 4 yes Figure 3 A sectional view;

[0030] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 yes Figure 4 Enlarged view of point B in the middle;

[0032] Figure 7 This is a cross-sectional view of the condenser.

[0033] In the diagram: 1. Shell, 2. Receiving chamber, 3. Mixing chamber, 4. Diffuser chamber, 5. Driving steam inlet pipe, 6. Ejector fluid inlet pipe, 7. Nozzle, 8. Collar, 9. Correcting block, 10. Push rod, 11. First shell, 12. Second shell, 13. Limiting ring one, 14. Limiting ring two, 15. Fixing ring one, 16. Fixing ring two, 17. Fixing ring three, 18. Fixing ring four, 19. Through hole, 20. Rotating block, 21. Rotating groove, 22. Rotating block, 23. Limiting groove, 24. Limiting ring, 25. Fixing rod, 26. Positioning hole, 27. Injection structure, 28. Condenser, 29. Injection outlet, 30. Condensation inlet, 31. Injection inlet, 32. Condensation outlet. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] Example 1:

[0036] like Figure 1 As shown, a steam jet vacuum system includes a driving steam pipe, an ejector fluid pipe, a jet structure 27, and a condenser 28. A regulating valve is connected to the driving steam pipe. Several jet structures 27 and condensers 28 are provided, with the same number of jet structures 27 and condensers 28. The jet structures 27 and condensers 28 are connected in a multi-stage series connection, with the condensers 28 positioned after the jet structures 27.

[0037] like Figure 2-4 As shown, the injection structure includes a housing 1, inside which a receiving chamber 2, a mixing chamber 3, and a diffuser chamber 4 are arranged in sequence. A driving steam inlet pipe 5 and an ejector fluid inlet pipe 6 are inserted into the housing 1. The port of the driving steam inlet pipe 5 faces the opening of the receiving chamber 2. The port of the ejector fluid inlet pipe 6 is placed between the opening of the receiving chamber 2 and the port of the driving steam inlet pipe 5. A nozzle 7 is connected to the port of the driving steam inlet pipe 5. The driving steam inlet pipe 5 is connected to a driving steam pipeline. The diffuser chamber 4 is provided with an injection outlet 29 and an injection inlet 31. The injection outlet 29 is connected to the condenser inlet 30, and the condenser outlet 32 ​​is connected to the injection inlet 31.

[0038] like Figure 7 As shown, the condenser 28 is provided with a condenser inlet 30 and a condenser outlet 32.

[0039] like Figure 6 As shown, the housing 1 is provided with a correction structure, which includes a collar 8 and a correction block 9. The collar 8 is rotatably connected to the housing 1, and a push rod 10 is inserted into the collar 8. One side of the correction block 9 is movably connected to the push rod 10, and the other side of the correction block 9 is opposite to the nozzle 7 and its structural shape is adapted to the nozzle 7. The housing 1 includes a first housing 11 and a second housing 12. One side of the collar 8 is attached to the side of the first housing 11, and the other side of the collar 8 is attached to the side of the second housing 12. A limiting ring 13 is fitted on the first housing 11, and a limiting ring 14 is fitted on the second housing 12. A fixing ring 15 and a fixing ring 16 are connected to the limiting ring 13. The fixing ring 15 is engaged with the first housing 11, and the fixing ring 16 is engaged with the collar 8. A fixing ring 37 and a fixing ring 48 are connected to the limiting ring 24. The fixing ring 317 is engaged with the second housing 12, and the fixing ring 48 is engaged with the collar 8. The collar 8 has a through hole 19 with an internal thread, and the push rod 10 has an external thread, which is threaded into the through hole 19. The push rod 10 has a rotating block 20, which is connected to the end of the push rod 10 that is outside the housing 1. The straightening block 9 has a rotating groove 21, and the push rod 10 is connected to a rotating block 22, which is engaged with the rotating groove 21. The push rod 10 is rotatably connected to the rotating groove 21.

[0040] like Figure 5 As shown, the first housing 11 is provided with a limiting groove 23, a limiting ring 24 is embedded in the limiting groove 23, a plurality of positioning holes 26 are provided on the bottom of the limiting groove 23, and a fixing rod 25 is connected to the limiting ring 24. The fixing rod 25 passes through the through hole 19 and abuts against the driving steam inlet pipe 5.

[0041] like Figure 1-7 As shown: There are at least two correction blocks 9, and each correction block 9 is arranged symmetrically to improve correction efficiency.

[0042] A limiting groove 23 is placed on the first housing 11, and a limiting ring 24 is embedded in the limiting groove 23. The outer surface of the limiting ring 24 is flush with the outer surface of the first housing 11 to keep the surface of the housing 1 neat and aesthetically pleasing. A sealing ring is provided between the contact surface of the limiting ring 24 and the limiting groove 23 to prevent steam leakage and ensure the airtightness of the housing 1.

[0043] One side of the limiting ring 13 is connected to the first housing 11 via the fixing ring 15, and the other side of the limiting ring 13 is connected to the collar 8 via the fixing ring 2 16. The connection seam between the first housing 11 and the collar 8 is located between the fixing ring 15 and the fixing ring 2 16. One side of the limiting ring 2 14 is connected to the second housing 12 via the fixing ring 3 17, and the other side of the limiting ring 2 14 is connected to the collar 8 via the fixing ring 4 18. The connection seam between the second housing 12 and the collar 8 is located between the fixing ring 3 17 and the fixing ring 4 18. The outer sides of the fixing ring 15 and the fixing ring 2 16, the connection between the limiting ring 13 and the first housing 11, and the collar 8 are equipped with sealing rings. The outer sides of the fixing ring 3 17 and the fixing ring 4 18, the connection between the limiting ring 2 14 and the second housing 12, and the collar 8 are equipped with sealing rings to prevent steam leakage and ensure the airtightness of the outer shell 1.

[0044] The push rod 10 is threadedly connected to the through hole 19. A sealing ring is fitted on the push rod 10. The sealing ring is placed at the outward opening of the through hole 19 to seal the through hole 19, thereby preventing steam leakage and ensuring the airtightness of the outer casing 1.

[0045] A method for using a steam jet vacuum system specifically includes the following steps:

[0046] Step 1: Set the pressure of the high-pressure steam with the regulating valve. The injection structure 27 at the head end introduces high-pressure steam through the driving steam pipe. The high-pressure steam enters the nozzle 7 and sprays out the high-pressure steam, which in turn drives the ejector fluid inlet pipe 6 to introduce the gas being drawn in through the ejector fluid pipe.

[0047] Step 2: The high-pressure steam and the extracted gas become a mixed gas and pass sequentially through receiving chamber 2, mixing chamber 3 and diffuser chamber 4;

[0048] Step 3: The mixed gas enters the condenser 28 through the jet outlet 29 and the condenser inlet 30, where it is cooled to form condensate and non-condensable gas.

[0049] Step 4: The central jet structure 27 introduces high-pressure steam through the driving steam pipe, while the jet inlet 31 allows the non-condensable gas from the previous condenser 28 to enter through the condenser outlet 32 ​​and mix with the high-pressure steam on this jet structure 27 to become a mixed gas.

[0050] Step 5: The jet structure 27 at the tail end introduces high-pressure steam through the driving steam pipe. At the same time, the jet inlet 31 allows the non-condensable gas from the previous condenser 28 to enter through the condenser outlet 32 ​​and mix with the high-pressure steam on this jet structure 27 to form a mixed gas. The mixed gas then enters the tail end condenser 28 through the jet outlet 29 and the condenser inlet 30. The tail end condenser 28 discharges the non-condensable gas into the atmosphere through the exhaust pipe through the condenser outlet 32.

[0051] Step 6: Correct the spray structure 27: Hold the rotating block 20 and rotate the push rod 10. Each correction block 9 rotates the same distance and is attached to the outer surface of the nozzle 7 to perform initial correction of the nozzle 7. Rotate the collar 8 to make the correction blocks 9 rotate against the nozzle 7 to perform secondary correction of the nozzle 7.

[0052] In this embodiment, the steam jet vacuum system is arranged as a three-stage steam jet plus a three-stage horizontal condenser structure. That is, the jet structure 27 includes three stages, which are set as a first-stage jet structure, a second-stage jet structure and a third-stage jet structure. The condenser 28 includes three stages, which are set as a first-stage condenser, a second-stage condenser and a third-stage condenser. The first-stage jet structure, the first-stage condenser, the second-stage jet structure, the second-stage condenser, the third-stage jet structure and the third-stage condenser are connected in series in turn in sequence.

[0053] After the pressure of the high-pressure steam is set by the regulating valve, the high-pressure steam is introduced into the primary injection structure through the driving steam pipe according to the ejector effect. The high-pressure steam enters the nozzle 7 through the driving steam inlet pipe 5, and the nozzle 7 ejects the high-pressure steam and drives the gas being drawn in through the ejector fluid inlet pipe 6. The low-pressure steam enters the receiving chamber 2 from the ejector fluid inlet pipe and follows the high-pressure driving steam into the mixing chamber 3. In this process, part of the kinetic energy of the driving steam is transferred to the gas being drawn in (ejector fluid), forming a mixed gas that enters the diffuser chamber 4 from the mixing chamber 3 and is then ejected.

[0054] The ejected mixed gas enters the condenser inlet 30 of the first-stage condenser through the jet outlet 29 on the diffuser 4 at the tail end of the first-stage jet structure (the jet outlets 29 and condenser inlets 30 are connected by pipes). The mixed gas enters the first-stage condenser and is cooled by the first-stage condenser to form condensate and non-condensable gas. The second-stage jet structure introduces high-pressure steam through the drive steam pipe. The jet inlet 31 on the second-stage jet structure is connected to the condenser outlet 32 ​​through a pipe, so that the non-condensable gas in the first-stage condenser enters the second-stage jet structure and mixes with the high-pressure steam on the second-stage jet structure to become a mixed gas (the condensate in each stage of the condenser 28 enters the gas-side space of the condenser hot well in the condenser through the drain pipe).

[0055] The mixed gas enters the condenser inlet 30 of the secondary condenser through the jet outlet 29 on the diffuser chamber 4 at the tail end of the secondary jet structure, thus allowing the mixed gas to enter the secondary condenser. The mixed gas is cooled by the secondary condenser to form condensate and non-condensable gas. The tertiary jet structure introduces high-pressure steam through a drive steam pipe. The jet inlet 31 on the tertiary jet structure is connected to the condenser outlet 32, allowing the non-condensable gas from the secondary condenser to enter the tertiary jet structure and mix with the high-pressure steam to become a mixed gas.

[0056] The mixed gas enters the condenser inlet 30 of the three-stage condenser through the jet outlet 29 on the diffuser 4 at the tail end of the three-stage jet structure. Even after the mixed gas enters the three-stage condenser, the three-stage condenser discharges the non-condensable gas into the atmosphere through the exhaust pipe via the condensation outlet 32. The above three stages achieve a high vacuum effect.

[0057] When maintaining and correcting the nozzles 7 in the first-stage, second-stage, and third-stage injection structures, hold the rotating block 20 and rotate the push rod 10 to push the correction block 9 close to the nozzle 7 until they are tightly fitted. Each correction block 9 rotates the same distance and is attached to the outer surface of the nozzle 7 for initial correction. Then, rotate the collar 8 to make the correction block 9 rotate against the nozzle 7 for secondary correction. This ensures that the nozzle 7 releases high-pressure steam at the correct angle and position, while improving the vacuum environment of the steam injection vacuum system and reducing noise.

Claims

1. A steam jet vacuum system, characterized in that, The system includes a driving steam pipe, an ejector fluid pipe, a jet structure (27), and a condenser (28). The jet structure includes a housing (1), which contains a receiving chamber (2), a mixing chamber (3), and a diffuser chamber (4) arranged sequentially. A driving steam inlet pipe (5) and an ejector fluid inlet pipe (6) are inserted into the housing (1). The opening of the driving steam inlet pipe (5) faces the opening of the receiving chamber (2). The opening of the ejector fluid inlet pipe (6) is located between the opening of the receiving chamber (2) and the opening of the driving steam inlet pipe (5). A nozzle (7) is connected to the opening of the driving steam inlet pipe (5). The driving steam inlet pipe (5) is connected to the driving steam pipe. The diffuser chamber (4) is provided with a jet outlet (29). Several jet structures (27) and condensers (28) are provided. The number of spray structures (27) and condensers (28) are connected in a multi-stage series. The spray structures (27) at the middle and tail ends are provided with spray inlets (31). The condenser (28) is placed after the spray structure (27). The condenser (28) is provided with a condensation inlet (30) and a condensation outlet (32). The spray outlet (29) is connected to the condensation inlet (30). The condensation outlet (32) is connected to the spray inlet (31). The housing (1) is provided with a correction structure. The correction structure includes a collar (8) and a correction block (9). The collar (8) is rotatably connected to the housing (1). A push rod (10) is inserted into the collar (8). One side of the correction block (9) is movably connected to the push rod (10). The other side of the correction block (9) is opposite to the nozzle (7) and its structural shape is adapted to the nozzle (7).

2. The steam jet vacuum system according to claim 1, characterized in that, A regulating valve is connected to the driving steam pipeline.

3. The steam jet vacuum system according to claim 1, characterized in that, The housing (1) includes a first housing (11) and a second housing (12). One side of the collar (8) is attached to the side of the first housing (11), and the other side of the collar (8) is attached to the side of the second housing (12). A limiting ring one (13) is fitted on the first housing (11), and a limiting ring two (14) is fitted on the second housing (12). A fixing ring one (15) and a fixing ring two (16) are connected to the limiting ring one (13). The fixing ring one (15) is fitted into the first housing (11), and the fixing ring two (16) is fitted into the collar (8). A fixing ring three (17) and a fixing ring four (18) are connected to the limiting ring two (14). The fixing ring three (17) is fitted into the second housing (12), and the fixing ring four (18) is fitted into the collar (8).

4. A steam jet vacuum system according to claim 3, characterized in that, The collar (8) is provided with a through hole (19), the through hole (19) is provided with an internal thread, the push rod (10) is provided with an external thread, and the push rod (10) is threadedly connected to the through hole (19).

5. A steam jet vacuum system according to claim 4, characterized in that, The push rod (10) is provided with a rotating block (20), and the rotating block (20) is connected to one end of the push rod (10) located outside the housing (1).

6. A steam jet vacuum system according to claim 5, characterized in that, The correction block (9) is provided with a rotating groove (21), and the push rod (10) is connected to a rotating block (22). The rotating block (22) is engaged with the rotating groove (21), and the push rod (10) is rotatably connected to the rotating groove (21).

7. A steam jet vacuum system according to claim 6, characterized in that, The first housing (11) is provided with a limiting groove (23), and a limiting ring (24) is embedded in the limiting groove (23). A plurality of positioning holes (26) are provided on the bottom of the limiting groove (23). A fixing rod (25) is connected to the limiting ring (24). The fixing rod (25) passes through the through hole (19) and abuts against the driving steam inlet pipe (5).

8. A method of using a steam jet vacuum system, employing a steam jet vacuum system as described in any one of claims 1 to 7, characterized in that, Specifically, the steps include the following: Step 1: Set the pressure of the high-pressure steam with the regulating valve. The jet structure (27) at the head end introduces high-pressure steam through the driving steam pipe. The nozzle (7) sprays out the high-pressure steam and drives the ejector fluid inlet pipe (6) to introduce the gas to be drawn in through the ejector fluid pipe. Step 2: The high-pressure steam and the gas being pumped become a mixed gas and pass through the receiving chamber (2), the mixing chamber (3) and the diffuser chamber (4) in sequence. Step 3: The mixed gas enters the condenser (28) through the injection outlet (29) and the condensation inlet (30), and the mixed gas is cooled to form condensate and non-condensable gas; Step 4: The central jet structure (27) introduces high-pressure steam through the driving steam pipe, while the jet inlet (31) allows the non-condensable gas from the previous condenser (28) to enter through the condenser outlet (32) and mix with the high-pressure steam on this jet structure (27) to become a mixed gas. Step 5: The jet structure (27) at the tail end introduces high-pressure steam through the driving steam pipe. At the same time, the jet inlet (31) allows the non-condensable gas from the previous condenser (28) to enter through the condenser outlet (32) and mix with the high-pressure steam on this jet structure (27) to form a mixed gas. The mixed gas then enters the condenser (28) at the tail end through the jet outlet (29) and the condenser inlet (30). The condenser (28) at the tail end discharges the non-condensable gas into the atmosphere through the exhaust pipe through the condenser outlet (32). Step 6: Correct the spray structure (27): Hold the rotating block (20) and rotate the push rod (10). Each correction block (9) rotates the same distance and is attached to the outer surface of the nozzle (7) to perform preliminary correction of the nozzle (7). Rotate the collar (8) to make the correction block (9) rotate along the nozzle (7) to perform secondary correction of the nozzle (7).

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