Intelligent double-seal type tank bottom anti-mixing valve

Abstract

The present application belongs to the technical field of tank bottom anti-mixing valve, in particular to an intelligent double-sealing type tank bottom anti-mixing valve, comprising an intelligent controller, a sensing rod is fixedly connected above the intelligent controller, a conversion plate is fixedly connected above the sensing rod, a cylinder lower cover plate body is fixedly connected above the conversion plate, a cylinder body is arranged above the cylinder lower cover plate body, a cylinder upper cover plate body is arranged above the cylinder body, an upper valve core piston body, a lower valve core piston body and a main piston body are respectively arranged in the cylinder body, and a pull rod body is fixedly connected below the main piston body. The intelligent controller, the cylinder body, the three-way gas circuit, the double-valve core double-sealing structure and the sensing feedback system are cooperated to realize the four core functions of intelligent pneumatic control, double-sealing anti-leakage, CIP online cleaning and automatic position feedback, and the overall structure is highly integrated, solving the problems of unreliable sealing of traditional valves and insufficient intelligence.

Description

Technical Field

[0001] This invention relates to the field of tank bottom anti-mixing valve technology, and more particularly to an intelligent double-seal tank bottom anti-mixing valve. Background Technology

[0002] The tank bottom anti-mixing valve is a key aseptic valve used in sanitary fluid systems such as biopharmaceuticals, food and beverage, dairy products, and fermentation. It is mainly installed at the bottom of the storage tank for material discharge, pipeline isolation, dual-media anti-mixing, and CIP online cleaning and sewage discharge. Through the upper and lower double valve core structure, it achieves complete isolation of two materials to prevent cross-contamination. At the same time, it has the characteristics of no retention, easy cleaning, and reliable sealing. It is a core actuator that meets the requirements of GMP aseptic production.

[0003] Traditional tank bottom anti-mixing valves have some drawbacks and are difficult to meet the needs of modern production:

[0004] First, it adopts a single-seal structure with no redundant protection. Once the seal is worn or aged, internal leakage is very likely to occur, which will directly cause material mixing and contamination. Moreover, it is impossible to judge the seal failure online.

[0005] Secondly, there is no integrated intelligent control. Solenoid valves and sensors are external and separate, making the air circuit control complex. It cannot automatically achieve integrated cleaning, discharge, and feedback, resulting in low automation, cumbersome operation, and high maintenance costs. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention provides an intelligent double-sealed tank bottom anti-mixing valve, which overcomes the shortcomings of the prior art and effectively solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An intelligent double-sealed tank bottom anti-mixing valve includes an intelligent controller. A sensing rod is fixedly connected to the top of the intelligent controller, and a conversion plate is fixedly connected to the top of the sensing rod. A cylinder lower cover plate body is fixedly connected to the top of the conversion plate, and a cylinder body is disposed above the cylinder lower cover plate body. A cylinder upper cover plate body is disposed above the cylinder body. An upper valve core piston body, a lower valve core piston body, and a main piston body are disposed inside the cylinder body. A pull rod body is fixedly connected to the bottom of the main piston body, and a valve core connecting sleeve body is disposed below the pull rod body. A lower valve core body is fixedly connected to the top of the valve core connecting sleeve body, and an upper valve core body is disposed correspondingly above the lower valve core body. A main valve body is disposed outside the upper and lower valve core bodies, and a tank bottom flange is disposed above the main valve body.

[0009] A pipe connector A is fixedly installed on one side of the outer wall of the cylinder body above the lower valve core piston body. A pipe connector B is fixedly installed on one side of the outer wall of the cylinder body between the lower valve core piston body and the main piston body. A pipe connector C is fixedly installed on one side of the outer wall of the cylinder body below the main piston body.

[0010] Preferably, the cylinder lower cover plate body is provided with a self-lubricating sleeve body and a positioning core inside, and a cylinder lower cover plate seal is sleeved on the inner wall of the cylinder lower cover plate body.

[0011] Preferably, an upper valve core piston sealing ring is sleeved on the outer wall of the upper valve core piston body, and a lower valve core piston seal one is sleeved on the inner wall of the lower valve core piston body, while a lower valve core piston seal two is sleeved on the outer wall of the lower valve core piston body.

[0012] Preferably, a main piston sealing ring one is sleeved on the outer wall of the main piston body, and a main piston sealing ring two is sleeved on the inner wall of the main piston body, and a main spring is provided between the main piston body and the cylinder lower cover plate body.

[0013] Preferably, the outer wall of the pull rod body is fitted with a pull rod O-ring one and a pull rod O-ring two, and the valve core connecting sleeve body is provided with a valve core connecting sleeve self-lubricating sleeve and a valve core connecting sleeve sealing ring inside, and a secondary spring is provided between the valve core connecting sleeve body and the main piston body.

[0014] Preferably, an upper valve core sealing ring is sleeved on the outer wall of the upper valve core body, and a lower valve core sealing ring one, a lower valve core self-lubricating sleeve one, and a lower valve core self-lubricating sleeve two are sleeved on the inner wall of the lower valve core body. A lower valve core sealing ring two is provided on the top outer wall of the lower valve core body, and a lower valve core sealing ring three is sleeved on the outer wall of the lower valve core body.

[0015] Preferably, a flange sealing ring is fitted between the tank bottom flange and the main valve body, and clamp one and clamp two are provided on the outside of the main valve body.

[0016] Preferably, a support body is provided between the cylinder upper cover plate body and the main valve body, and the inner wall of the support body is provided with support sealing ring one, support sealing ring two, support sealing ring three, support sealing ring four, support sealing ring five, support self-lubricating sleeve one and support self-lubricating sleeve two.

[0017] Preferably, the upper cylinder cover plate body is provided with a cylinder upper cover plate seal and a cylinder upper cover plate self-lubricating sleeve inside the cylinder upper cover plate body, and a cylinder upper cover plate seal is provided on the outside of the cylinder upper cover plate body, and a cylinder lower cover plate seal is provided on the outside of the cylinder lower cover plate body.

[0018] Preferably, a wire retaining ring is provided between the upper cover plate body and the cylinder body, and a wire retaining ring is provided between the lower cover plate body and the cylinder body.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The intelligent double-seal tank bottom anti-mixing valve of the present invention achieves four core functions through the coordinated operation of an intelligent controller, cylinder body, three air circuits, double valve core double seal structure and induction feedback system: intelligent pneumatic control, double seal anti-leakage, CIP online cleaning and automatic position feedback. The overall structure is highly integrated, which solves the problems of unreliable sealing and insufficient intelligence of traditional valves.

[0021] 2. The intelligent double-sealed tank bottom anti-mixing valve of the present invention achieves double-sealed isolation and anti-mixing through the integrated design of upper and lower double valve cores, main valve body, tank bottom flange and intelligent controller. The valve body is streamlined with no dead corners and no stagnation. With the help of the sensing rod and conversion plate, it realizes real-time position monitoring, which improves the hygiene level and safety level.

[0022] 3. The intelligent double-sealed tank bottom anti-mixing valve of the present invention has three independent air circuits designed with air pipe connector A, air pipe connector B and air pipe connector C. It can accurately control three working modes: lower valve core cleaning, material discharge and upper valve core cleaning. The air circuits do not interfere with each other, the action switching is stable and the degree of automation is high.

[0023] 4. The intelligent double-seal tank bottom anti-mixing valve of the present invention significantly improves the smoothness of movement and sealing life through the linkage structure of multiple sealing rings, self-lubricating sleeves, main spring and auxiliary spring. The double seals serve as backups for each other, and even if one seal fails, mixing can still be prevented, resulting in more stable operation and a longer maintenance cycle. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the intelligent double-seal tank bottom anti-mixing valve proposed in this invention;

[0025] Figure 2 for Figure 1 Enlarged schematic diagram of part D of the structure;

[0026] Figure 3 for Figure 1 Enlarged schematic diagram of part E of the structure;

[0027] Figure 4 for Figure 1 Enlarged schematic diagram of the F part structure;

[0028] Figure 5 This is a diagram showing the CIP cleaning fluid flow path when air enters the air pipe connector A of the intelligent double-seal anti-mixing valve at the bottom of the tank proposed in this invention.

[0029] Figure 6 This is a diagram showing the CIP cleaning fluid flow path when the air pipe connector C of the intelligent double-seal anti-mixing valve at the bottom of the tank proposed in this invention is introduced.

[0030] Figure 7This is a material flow path diagram of the air pipe joint B of the intelligent double-sealed tank bottom anti-mixing valve proposed in this invention when air is introduced.

[0031] In the diagram: 1. Intelligent controller; 2. Sensing rod; 3. Air pipe connector A; 4. Conversion plate; 5. Cylinder lower cover plate body; 6. Self-lubricating sleeve body; 7. Positioning core; 8. Cylinder body; 9. Upper valve core piston body; 10. Upper valve core piston sealing ring; 11. Tie rod O-ring one; 12. Air pipe connector B; 13. Lower valve core piston seal one; 14. Cylinder upper cover plate body; 15. Steel wire retaining ring one; 16. Valve core connecting sleeve body; 17. Air pipe connector C; 18. Bracket sealing ring one; 19. Bracket sealing ring two; 20. Bracket self-lubricating sleeve one; 21. Tie rod body; 22. Lower valve core body; 23. Lower valve core sealing ring one; 24. Main valve body; 25. Clamp one; 26. Flange sealing ring; 27. Tank bottom flange; 28. Upper valve core body; 29. ​​Upper valve core sealing ring; 30. 31. Lower valve core sealing ring II; 32. Lower valve core sealing ring III; 33. Lower valve core self-lubricating sleeve I; 34. Bracket sealing ring III; 35. Bracket sealing ring IV; 36. Clamp II; 37. Bracket body; 38. Bracket sealing ring V; 39. Lower valve core self-lubricating sleeve II; 40. Bracket self-lubricating sleeve II; 41. Tie rod O-ring II; 42. Cylinder lower cover plate seal II; 43. Cylinder upper cover plate self-lubricating sleeve; 44. Cylinder upper cover plate seal I; 45. Cylinder upper cover plate seal II; 46. Lower valve core piston seal II; 47. Lower valve core piston body; 48. Valve core connecting sleeve self-lubricating sleeve; 49. Valve core connecting sleeve sealing ring; 50. Secondary spring; 51. Main piston sealing ring I; 52. Main piston body; 53. Main piston sealing ring II; 54. Main spring; 55. Cylinder lower cover plate seal I; 56. Wire retainer ring II. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Reference Figures 1-7Example 1: Intelligent double-sealed tank bottom anti-mixing valve includes an intelligent controller 1. A sensing rod 2 is fixedly connected above the intelligent controller 1, and a conversion plate 4 is fixedly connected above the sensing rod 2. A cylinder lower cover plate body 5 is fixedly connected above the conversion plate 4, and a cylinder body 8 is provided above the cylinder lower cover plate body 5. A cylinder upper cover plate body 14 is provided above the cylinder body 8. An upper valve core piston body 9, a lower valve core piston body 46, and a main piston body 51 are respectively provided inside the cylinder body 8. A pull rod body 21 is fixedly connected below the main piston body 51, and a valve core connecting sleeve body 16 is provided below the pull rod body 21. A lower valve core body 22 is fixedly connected above the valve core connecting sleeve body 16, and an upper valve core body 28 is correspondingly provided above the lower valve core body 22. A main valve body 24 is provided outside the upper valve core body 28 and the lower valve core body 22, and a tank bottom flange 27 is provided above the main valve body 24.

[0034] Through the above scheme, the intelligent controller 1 integrates solenoid valves, sensors and control circuits to realize fully automatic gas path switching and status monitoring. The sensing rod 2 and the conversion plate 4 move synchronously with the piston and output precise position signals to the intelligent controller 1. The upper valve core body 28 and the lower valve core body 22 form a double-sealed isolation structure to effectively prevent cross-mixing of media. The main valve body 24 and the bottom flange 27 of the tank adopt a sanitary-grade design without dead corners to ensure zero material residue and easy cleaning. The overall structure is compact and the operation is stable.

[0035] In this embodiment, the integrated design of the upper and lower double valve cores, the main valve body 24, the tank bottom flange 27 and the intelligent controller 1 achieves double sealing isolation to prevent mixing. The streamlined valve body has no dead angles and no stagnation. In conjunction with the sensing rod 2 and the conversion plate 4, the position can be monitored in real time, which improves the hygiene and safety levels.

[0036] In Example 2, an air pipe connector A3 is fixedly installed on one side of the outer wall of the cylinder body 8 above the lower valve core piston body 46, an air pipe connector B12 is fixedly installed on one side of the outer wall of the cylinder body 8 between the lower valve core piston body 46 and the main piston body 51, and an air pipe connector C17 is fixedly installed on one side of the outer wall of the cylinder body 8 below the main piston body 51.

[0037] With the above scheme, the three independent air inlets correspond to three working modes respectively. Air pipe connector A3 is responsible for driving the lower valve core piston body 46 to complete the lower valve core CIP cleaning, air pipe connector B12 is responsible for driving the main piston body 51 to complete the material discharge, and air pipe connector C17 is responsible for driving the upper valve core piston body 9 to complete the upper valve core CIP cleaning. The three air lines are independent of each other and do not cross-contaminate. The intelligent controller 1 automatically controls the on and off, with precise action and rapid response. There is no need for manual switching, realizing fully automated operation.

[0038] In this embodiment, the design of three independent air circuits—air pipe connector A3, air pipe connector B12, and air pipe connector C17—allows for precise control of three working modes: lower valve core cleaning, material discharge, and upper valve core cleaning. The air circuits do not interfere with each other, the switching of actions is stable, and the degree of automation is high.

[0039] In embodiment three, a main piston sealing ring 50 is fitted onto the outer wall of the main piston body 51, and a main piston sealing ring 52 is fitted onto the inner wall of the main piston body 51. A main spring 53 is provided between the main piston body 51 and the cylinder lower cover plate body 5. A tie rod O-ring 11 and a tie rod O-ring 40 are fitted onto the outer wall of the tie rod body 21. A self-lubricating sleeve 47 and a sealing ring 48 are provided inside the valve core connecting sleeve body 16. A secondary spring 49 is provided between the valve core connecting sleeve body 16 and the main piston body 51.

[0040] Through the above scheme, the main piston sealing ring 50 and the main piston sealing ring 52 form a double airtight protection to ensure stable cylinder thrust without pressure leakage. The main spring 53 provides the main piston reset power to realize automatic closure when power and air are cut off. The tie rod O-ring 11 and the tie rod O-ring 40 form a double seal on the valve stem to isolate the medium from the cylinder. The valve core connecting sleeve self-lubricating sleeve 47 reduces frictional resistance and makes the lifting and lowering movement smoother. The auxiliary spring 49 provides buffering and compensation functions, improves the valve core closing accuracy, and extends the overall service life.

[0041] In this embodiment, the linkage structure of multiple sealing rings, self-lubricating sleeves, main spring 53 and auxiliary spring 49 greatly improves the smoothness of movement and sealing life. The dual seals serve as backups for each other, and even if one seal fails, material mixing can be prevented, resulting in more stable operation and a longer maintenance cycle.

[0042] The cylinder lower cover plate body 5 is provided with a self-lubricating sleeve body 6 and a positioning core 7 inside, and the cylinder lower cover plate body 5 is fitted with a cylinder lower cover plate seal 41.

[0043] Through the above scheme, the self-lubricating sleeve body 6 and the positioning core 7 provide centered guidance for the tie rod body 21, ensuring coaxiality of movement and avoiding shaking and uneven wear. The cylinder lower cover plate seal 41 enhances the airtightness of the cylinder bottom, prevents gas leakage, and improves driving efficiency and operational stability.

[0044] The upper valve core piston body 9 is fitted with an upper valve core piston sealing ring 10 on its outer wall, and the lower valve core piston body 46 is fitted with a lower valve core piston seal 13 on its inner wall, and a lower valve core piston seal 2 45 on its outer wall.

[0045] Through the above scheme, the upper valve core piston sealing ring 10 ensures the air chamber of the upper valve core piston body 9 is sealed, and the lower valve core piston seal 13 and the lower valve core piston seal 2 45 form a double seal inside and outside, completely isolating different air chambers, avoiding air leakage that could cause malfunctions, and ensuring that each pneumatic control can be executed accurately.

[0046] The upper valve core body 28 is fitted with an upper valve core sealing ring 29 on its outer wall. The lower valve core body 22 is fitted with a lower valve core sealing ring 1 23, a lower valve core self-lubricating sleeve 1 32 and a lower valve core self-lubricating sleeve 2 38 on its inner wall. The lower valve core body 22 is fitted with a lower valve core sealing ring 2 30 on its top outer wall and a lower valve core sealing ring 31 on its outer wall.

[0047] Through the above scheme, the upper valve core sealing ring 29, the lower valve core sealing ring 2 30, and the lower valve core sealing ring 3 31 form a double sealing protection system. When one seal fails, the other can still effectively isolate the valve, completely eliminating the risk of material mixing. The lower valve core self-lubricating sleeve 1 32 and the lower valve core self-lubricating sleeve 2 38 reduce sliding friction, reduce seal wear, and improve the service life and reliability of the valve.

[0048] A flange sealing ring 26 is fitted between the bottom flange 27 and the main valve body 24, and clamp 1 25 and clamp 2 35 are provided on the outside of the main valve body 24.

[0049] Through the above solution, the flange sealing ring 26 ensures that there is no leakage at the bottom of the tank. The clamp 25 and clamp 35 adopt a quick-installation structure, which facilitates valve disassembly, cleaning, maintenance and replacement of parts, and meets the requirements of convenient operation and maintenance of sanitary equipment.

[0050] A bracket body 36 is provided between the cylinder upper cover plate body 14 and the main valve body 24, and the inner wall of the bracket body 36 is provided with bracket sealing ring 18, bracket sealing ring 29, bracket sealing ring 33, bracket sealing ring 44, bracket sealing ring 5, bracket self-lubricating sleeve 10, and bracket self-lubricating sleeve 29.

[0051] Through the above scheme, the bracket sealing ring 18, bracket sealing ring 29, bracket sealing ring 33, bracket sealing ring 434 and bracket sealing ring 537 form a full-path hygienic seal to prevent external contamination from entering the system. The bracket self-lubricating sleeve 120 and bracket self-lubricating sleeve 239 provide low-friction guidance for the movement of the lower valve core body 22, ensuring smooth operation, no jamming, and no uneven wear.

[0052] The cylinder upper cover plate body 14 is provided with cylinder upper cover plate seal 43 and cylinder upper cover plate self-lubricating sleeve 42 inside, and cylinder upper cover plate seal 44 is provided on the outside of cylinder upper cover plate body 14, and cylinder lower cover plate seal 54 is provided on the outside of cylinder lower cover plate body 5.

[0053] Through the above solutions, the cylinder upper cover plate seal 43 and cylinder lower cover plate seal 54 further improve the airtightness of the whole machine. The cylinder upper cover plate self-lubricating sleeve 42 ensures smooth movement of the valve core connecting sleeve body 16, reduces power consumption and noise, and improves the stability and durability of the valve in long-term operation.

[0054] A wire retaining ring 15 is provided between the cylinder upper cover plate body 14 and the cylinder body 8, and a wire retaining ring 55 is provided between the cylinder lower cover plate body 5 and the cylinder body 8.

[0055] Through the above scheme, the wire clasp 15 and the wire clasp 2 55 enable the rapid and secure assembly of the cylinder upper cover plate body 14 and the cylinder lower cover plate body 5 with the cylinder body 8. The structure is compact, not easy to loosen, and facilitates disassembly and maintenance in the later stage, thereby improving production and maintenance efficiency.

[0056] Working principle: This valve is automatically controlled by a built-in solenoid valve in the intelligent controller 1, which controls three air circuits: air pipe connector A3, air pipe connector B12, and air pipe connector C17, to achieve fully automatic operation in three modes. During CIP cleaning of the upper valve core, air enters through air pipe connector C17, pushing the upper valve core piston body 9 to move, which in turn opens the upper valve core body 28, allowing cleaning fluid to enter the valve chamber and complete the cleaning.

[0057] When performing CIP cleaning of the lower valve core, air is introduced through the air pipe connector A3, which pushes the lower valve core piston body 46 to move, causing the lower valve core body 22 to open and clean the sealing area between the two valve cores.

[0058] When discharging materials, air enters through the air pipe connector B12, pushing the main piston body 51 downward. This, in turn, pulls the lower valve core body 22 through the pull rod body 21, allowing the materials to be discharged smoothly.

[0059] The valve adopts a double-seal redundant structure. The upper valve core sealing ring 29, the lower valve core sealing ring 2 30, and the lower valve core sealing ring 31 form multiple protections. Even if a single seal is damaged, it can still prevent material mixing. The intelligent controller 1 collects the valve core position signal in real time through the sensing rod 2 and the conversion plate 4, automatically feeds back the opening, closing, and cleaning status, and can monitor seal leakage and remind you to maintain and replace it in time.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent double-sealed tank bottom anti-mixing valve, comprising an intelligent controller (1), characterized in that, A sensing rod (2) is fixedly connected above the intelligent controller (1), and a conversion plate (4) is fixedly connected above the sensing rod (2). A cylinder lower cover plate body (5) is fixedly connected above the conversion plate (4), and a cylinder body (8) is provided above the cylinder lower cover plate body (5). A cylinder upper cover plate body (14) is provided above the cylinder body (8), and an upper valve core piston body (9), a lower valve core piston body (46), and a main piston body (51) are respectively provided inside the cylinder body (8). A pull rod body (21) is fixedly connected below the main piston body (51), and a valve core connecting sleeve body (16) is provided below the pull rod body (21). A lower valve core body (22) is fixedly connected above the valve core connecting sleeve body (16), and an upper valve core body (28) is correspondingly provided above the lower valve core body (22). A main valve body (24) is provided outside the upper valve core body (28) and the lower valve core body (22), and a tank bottom flange (27) is provided above the main valve body (24). A pipe connector A (3) is fixedly installed on one side of the outer wall of the cylinder body (8) above the lower valve core piston body (46). A pipe connector B (12) is fixedly installed on one side of the outer wall of the cylinder body (8) between the lower valve core piston body (46) and the main piston body (51). A pipe connector C (17) is fixedly installed on one side of the outer wall of the cylinder body (8) below the main piston body (51).

2. The intelligent double-seal type tank bottom anti-mixing valve according to claim 1, characterized in that, The cylinder lower cover plate body (5) is provided with a self-lubricating sleeve body (6) and a positioning core (7), and the cylinder lower cover plate body (5) is fitted with a cylinder lower cover plate seal (41).

3. The intelligent double-seal type tank bottom anti-mixing valve according to claim 1, characterized in that, The upper valve core piston body (9) is fitted with an upper valve core piston sealing ring (10) on its outer wall, and the lower valve core piston body (46) is fitted with a lower valve core piston seal one (13) on its inner wall, and the lower valve core piston body (46) is fitted with a lower valve core piston seal two (45) on its outer wall.

4. The intelligent double-seal type tank bottom anti-mixing valve according to claim 1, characterized in that, The outer wall of the main piston body (51) is fitted with a main piston sealing ring one (50), and the inner wall of the main piston body (51) is fitted with a main piston sealing ring two (52). A main spring (53) is provided between the main piston body (51) and the cylinder lower cover plate body (5).

5. The intelligent double-seal type tank bottom anti-mixing valve according to claim 1, characterized in that, The outer wall of the pull rod body (21) is fitted with a pull rod O-ring one (11) and a pull rod O-ring two (40), and the valve core connecting sleeve body (16) is provided with a valve core connecting sleeve self-lubricating sleeve (47) and a valve core connecting sleeve sealing ring (48). A secondary spring (49) is provided between the valve core connecting sleeve body (16) and the main piston body (51).

6. The intelligent double-seal type tank bottom anti-mixing valve according to claim 1, characterized in that, The upper valve core body (28) is fitted with an upper valve core sealing ring (29) on its outer wall. The lower valve core body (22) is fitted with a lower valve core sealing ring one (23), a lower valve core self-lubricating sleeve one (32) and a lower valve core self-lubricating sleeve two (38) on its inner wall. The lower valve core body (22) is provided with a lower valve core sealing ring two (30) on its top outer wall. The lower valve core body (22) is fitted with a lower valve core sealing ring three (31) on its outer wall.

7. The intelligent double-sealed tank bottom anti-mixing valve according to claim 1, characterized in that, A flange sealing ring (26) is fitted between the bottom flange (27) of the tank and the main valve body (24), and clamps one (25) and clamp two (35) are provided on the outside of the main valve body (24).

8. The intelligent double-seal type tank bottom anti-mixing valve according to claim 1, characterized in that, A bracket body (36) is provided between the cylinder upper cover plate body (14) and the main valve body (24), and the inner wall of the bracket body (36) is provided with bracket sealing ring one (18), bracket sealing ring two (19), bracket sealing ring three (33), bracket sealing ring four (34), bracket sealing ring five (37), bracket self-lubricating sleeve one (20) and bracket self-lubricating sleeve two (39).

9. The intelligent double-seal type tank bottom anti-mixing valve according to claim 1, characterized in that, The cylinder upper cover plate body (14) is provided with cylinder upper cover plate seal one (43) and cylinder upper cover plate self-lubricating sleeve (42) inside, and cylinder upper cover plate seal two (44) is provided outside the cylinder upper cover plate body (14), and cylinder lower cover plate seal one (54) is provided outside the cylinder lower cover plate body (5).

10. The intelligent double-seal type tank bottom anti-mixing valve according to claim 1, characterized in that, A steel wire retaining ring (15) is provided between the cylinder upper cover plate body (14) and the cylinder body (8), and a steel wire retaining ring (55) is provided between the cylinder lower cover plate body (5) and the cylinder body (8).

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