Food grade plate pneumatic diverter valve

Abstract

This invention relates to the field of directional valve technology, and more particularly to a food-grade plate-type pneumatic directional valve, comprising a directional valve housing, a first channel at one end of the directional valve housing, two channels and a third channel at the bottom of the directional valve housing, quick-opening hand holes on both sides of the directional valve housing, a pneumatic actuator mounted on the side wall of the directional valve housing, and a baffle plate inside the directional valve housing connected to the pneumatic actuator via a coupling. This invention utilizes a float plate and microswitches. The float plate drives a slider to move within a groove. When the slider moves to contact either the first or second microswitch, a corresponding electrical signal is triggered. When liquid leakage causes an abnormal rise in the water level of a certain channel, the float plate rises accordingly, triggering the second microswitch, which activates an electric push rod to push the push plate, causing the rubber band to expand. The rubber band then opens the rubber sealing gasket, enhancing the sealing effect and reducing the possibility of leakage expansion.

Description

Technical Field

[0001] This invention relates to the field of directional valve technology, and more particularly to a food-grade plate-type pneumatic directional valve. Background Technology

[0002] In food processing, it is often necessary to precisely control the conveying direction of liquid foods such as juices, dairy products, and sauces to meet the needs of different production processes.

[0003] Currently, there are many problems with directional valves used in food processing. Some directional valves adopt a traditional integral structure design with low processing precision and poor compatibility between components, making them prone to fluid leakage. This not only causes food waste but may also lead to food safety issues. In terms of actuation methods, some directional valves use manual or ordinary electric actuation. Manual actuation is cumbersome, cannot achieve remote control, and is not conducive to automated production; ordinary electric actuation poses safety hazards in humid food processing environments and has poor actuation stability.

[0004] Regarding equipment cleaning, existing directional valves have complex internal structures and large unsanitary areas, making them unsuitable for online cleaning. Cleaning the internal components of directional valves requires disassembly and offline cleaning, increasing unnecessary workload and safety hazards. In terms of sealing performance, most directional valves use a single sealing material, resulting in poor sealing performance. After long-term use, the sealing components are prone to wear, leading to further degradation of sealing performance.

[0005] During equipment operation, the internal sealing baffle and its surrounding rubber gasket are prone to wear due to long-term friction and pressure, especially under frequent start-stop or high-pressure conditions. Traditional plate-type pneumatic directional valves are difficult to detect and monitor liquid leakage in the other channel during operation, which often results in minor leaks going undetected. Once a leak occurs, the liquid may seep into the equipment or contaminate the surrounding environment, which not only directly affects the quality control of food processing but may also pose a threat to the safety of the final product. Such valves lack an effective leak response mechanism and cannot quickly initiate the discharge procedure based on the leak situation, making it difficult to remove accumulated liquid in time and reducing the continuous operation capability of the equipment. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of lack of leak detection and difficulty in timely response in the prior art, and to propose a food-grade plate-type pneumatic directional valve.

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

[0008] A food-grade plate-type pneumatic directional valve includes a directional valve housing, a first channel at one end of the directional valve housing, a second channel and a third channel at the bottom of the directional valve housing, quick-opening hand holes on both sides of the directional valve housing, a pneumatic actuator on the side wall of the directional valve housing, a baffle inside the directional valve housing connected to the pneumatic actuator via a coupling, a discharge hole on the inner side wall of the directional valve housing, an L-shaped plate on the side wall of the discharge hole, a first movable plate inside the directional valve housing, a sealing plate on the side wall of the first movable plate, a float plate for detecting water volume inside the directional valve housing, and a rubber sealing gasket on the outer side of the baffle.

[0009] Preferably, the directional valve housing is provided with a fixed baffle, and the directional valve housing and the baffle are made of food-grade stainless steel, preferably AISI316L stainless steel.

[0010] Preferably, the directional valve housing sidewall is provided with a mounting flange, a lead screw is inserted into the sidewall of the mounting flange, a cap nut is provided on the sidewall of the mounting flange, the cap nut is threadedly connected to the outer sidewall of the lead screw, a first bolt washer is provided on the outer sidewall of the cap nut, and the pneumatic actuator sidewall is connected to the mounting flange.

[0011] Preferably, the coupling end is coaxially provided with a first rotating shaft, the first rotating shaft end is coaxially provided with a torque output shaft, and the inner sidewall of the torque output shaft is provided with an internal hex bolt.

[0012] Preferably, the sidewall of the baffle is provided with a PEEK seal and a fluororubber O-ring, the sidewall of the baffle is provided with a second rotating shaft, the end of the first rotating shaft is coaxially provided with a bushing, the inner sidewall of the second rotating shaft is coaxially provided with an external hexagonal bolt, the outer sidewall of the second rotating shaft is provided with a second bolt washer, and the PEEK seal and the fluororubber O-ring are coaxially provided on the outer sidewall of the second rotating shaft.

[0013] Preferably, the inner wall of the directional valve housing is symmetrically provided with multiple guide rods, the first movable plate is slidably disposed on the outer wall of the guide rods, the sealing plate is installed on the side wall of the first movable plate, the sealing plate and the L-shaped plate are adapted to each other, and multiple discharge pipes are symmetrically inserted into the side wall of the directional valve housing.

[0014] Preferably, the inner sidewall of the directional valve housing is symmetrically provided with a second traction wheel, and the sidewall of the baffle is provided with a second traction rope, the second traction rope being connected to the first movable plate through the second traction wheel.

[0015] Preferably, the inner wall of the directional valve housing is provided with symmetrical grooves, the inner wall of the groove is provided with a slider, the side wall of the slider is provided with a second moving plate, and the bottom of the second moving plate is provided with a float plate.

[0016] Preferably, the inner sidewall of the slide is provided with a first micro switch and a second micro switch, the end of the slider is provided with a second support rod and a telescopic rod, the end of the second support rod is provided with a first contact plate, and the end of the telescopic rod is provided with a second contact plate.

[0017] Preferably, the directional valve housing is symmetrically provided with an electric winch and a first traction wheel on its side wall. The electric winch is provided with a first traction rope, which is connected to a first moving plate through the first traction wheel. The electric winch is electrically connected to a first micro switch.

[0018] Preferably, the side wall of the baffle is provided with a rubber strip, the rubber sealing gasket is fixedly installed on the outer side wall of the rubber strip, a sealing movable cavity is opened in the baffle, an electric push rod is provided on the inner side wall of the sealing movable cavity, the electric push rod is electrically connected to a second micro switch, a third support rod is provided at the output end of the electric push rod, a push plate is provided at the end of the third support rod, and the rubber strip is connected to the sealing movable cavity through a connecting pipe.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. This invention, by setting up a float plate and micro switches, allows the float plate to drive a slider to move within a chute. When the slider moves to contact the first or second micro switch, a corresponding electrical signal is triggered. When liquid leakage causes an abnormal rise in the water level of a certain channel, the float plate will rise accordingly, triggering the second micro switch. This activates the electric push rod to push the push plate, causing the rubber belt to expand. The rubber belt then opens the rubber sealing gasket, enhancing the sealing effect and reducing the possibility of leakage expansion. Furthermore, when excessive liquid leakage occurs, the float plate will rise to a certain height and trigger the first micro switch. The first micro switch controls the rotation of the electric winch. The electric winch, through the first traction rope and the first traction wheel, drives the first moving plate to move, causing the first moving plate to release the sealing effect of the sealing plate. The leaked liquid can be discharged in a timely manner through multiple discharge pipes, preventing liquid accumulation inside the equipment and ensuring the continuous operation capability of the equipment.

[0021] 2. The invention features a quick-opening handhole design, which facilitates daily maintenance and cleaning for operators, reduces unsanitary areas, ensures the stability of equipment operation, and lowers operational intensity and food safety risks. The dual sealing structure of PEEK seal and fluororubber O-ring effectively reduces fluid leakage and maintains a good sealing effect even under long-term operation, ensuring the cleanliness of the production environment. Attached Figure Description

[0022] Figure 1 This is an isometric view of a food-grade plate-type pneumatic directional valve proposed in this invention;

[0023] Figure 2This is a sectional side view of the fixed baffle of a food-grade plate-type pneumatic directional valve proposed in this invention;

[0024] Figure 3 A partial schematic diagram (A) shows a food-grade plate-type pneumatic directional valve proposed in this invention.

[0025] Figure 4 This is a top view of the directional valve housing of a food-grade plate-type pneumatic directional valve proposed in this invention;

[0026] Figure 5 This is an exploded schematic diagram of the baffle of a food-grade plate-type pneumatic directional valve proposed in this invention;

[0027] Figure 6 This is a sectional side view of the valve housing of a food-grade plate-type pneumatic directional valve proposed in this invention;

[0028] Figure 7 This is a partial schematic diagram (B) of a food-grade plate-type pneumatic directional valve proposed in this invention;

[0029] Figure 8 This is a sectional bottom view of the directional valve housing of a food-grade plate-type pneumatic directional valve proposed in this invention;

[0030] Figure 9 This is a cross-sectional front view of the baffle of a food-grade plate-type pneumatic directional valve proposed in this invention.

[0031] In the diagram: 1. Diverter valve housing; 2. Channel 1; 3. Channel 2; 4. Channel 3; 5. Fixed baffle; 6. Baffle; 7. Mounting flange; 8. Quick-opening manhole; 9. Lead screw; 10. First rotating shaft; 11. First bolt washer; 12. Cap nut; 13. Pneumatic actuator; 14. Coupling; 15. PEEK seal; 16. External hex bolt; 17. Fluororubber O-ring; 18. Second rotating shaft; 19. Bushing; 20. Torque output shaft; 21. Second bolt washer; 22. Internal hex bolt; 23. First traction wheel; 24. ... 25. Traction rope; 26. Electric winch; 27. First moving plate; 28. First micro switch; 29. ​​Second micro switch; 30. First contact plate; 31. Second support rod; 32. Second contact plate; 33. Telescopic rod; 34. Slider; 35. Second moving plate; 36. Second traction rope; 37. Second traction wheel; 38. Float; 39. Guide rod; 40. Sealing plate; 41. L-shaped plate; 42. Discharge pipe; 43. Rubber belt; 44. Rubber sealing gasket; 45. Connecting pipe; 46. Push plate; 47. Electric push rod; 48. Third support rod. 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 1-9 A food-grade plate-type pneumatic diverter valve includes a diverter valve housing 1. The diverter valve housing 1 has a channel 2 at one end and channels 3 and 4 at the bottom. Liquid is transported through channel 2. A fixed baffle 5 is fixedly installed on the inner wall of the diverter valve housing 1, so that the liquid is diverted to channel 3 or channel 4 through the baffle 6, thereby meeting the diverse process requirements in food processing.

[0034] The directional valve housing 1 and baffle 6 are made of food-grade stainless steel, preferably AISI 316L stainless steel. This design effectively ensures the safety and hygiene of the directional valve when in contact with food fluids, reduces the risk of food contamination due to material issues, and meets the stringent requirements of the food processing industry for equipment materials. AISI 316L stainless steel has excellent corrosion resistance and can be used stably for a long time in humid food processing environments, extending the service life of the directional valve and reducing the company's equipment maintenance costs.

[0035] The diversion valve housing 1 has quick-opening handholes 8 on both sides. This design facilitates daily inspection and maintenance of the interior of the diversion valve housing 1 by operators. It allows for quick opening without complicated disassembly, enabling timely detection of potential problems and corresponding measures. This improves equipment maintenance efficiency, reduces downtime, and ensures the continuity of food processing production. When cleaning is required, the quick-opening handholes 8 facilitate cleaning work. Operators can thoroughly clean the interior of the diversion valve through the quick-opening handholes 8, avoiding the existence of sanitary dead corners and ensuring the cleanliness of the interior of the diversion valve, thus meeting the strict cleanliness requirements of food processing equipment.

[0036] The pneumatic actuator 13 is fixedly mounted on the side wall of the directional valve housing 1. The mounting flange 7 is fixedly mounted on the side wall of the directional valve housing 1. The lead screw 9 is inserted into the side wall of the mounting flange 7. The side wall of the mounting flange 7 is provided with a cap nut 12. The cap nut 12 and the outer side wall of the lead screw 9 are threaded together, which enhances the stability of the connection and reduces the possibility of loosening due to vibration or pressure changes during use. This ensures a reliable connection between the pneumatic actuator 13 and the directional valve housing 1, and ensures that the directional valve housing 1 can operate stably.

[0037] The first bolt washer 11 is coaxially sleeved on the outer wall of the cap nut 12. The side wall of the pneumatic actuator 13 is fixedly connected to the mounting flange 7. Through the cooperation of the mounting flange 7 and the pneumatic actuator 13, the automated control of the directional valve body 1 is realized. The operator can remotely control the pneumatic actuator 13 to precisely control the position of the baffle 6, change the direction of fluid delivery, improve production efficiency, and reduce the intensity and error of manual operation. The pneumatic actuator 13 adopts a pneumatic drive method, which has higher safety and stability compared with manual drive and ordinary electric drive. It can effectively avoid safety hazards such as electric leakage in the humid food processing environment, accurately realize the switching action of the baffle 6, and meet the rapidly changing production needs of food processing.

[0038] The first rotating shaft 10 is coaxially fixedly sleeved at the end of the coupling 14, and the torque output shaft 20 is coaxially fixedly installed at the end of the first rotating shaft 10. The outer wall of the hexagon socket bolt 22 is threadedly connected to the inner wall of the torque output shaft 20. The torque output shaft 20 is tightly connected to the first rotating shaft 10 through the hexagon socket bolt 22, ensuring the stability and reliability of torque transmission. When the pneumatic actuator 13 drives the coupling 14 to rotate, the first rotating shaft 10 can synchronously drive the torque output shaft 20 to rotate, which makes it convenient for the operator to rotate the baffle 6 and control the direction of fluid delivery.

[0039] A baffle 6 is provided inside the directional valve housing 1. The baffle 6 is fixedly connected to the pneumatic actuator 13 via a coupling 14. The side wall of the baffle 6 is provided with a PEEK seal 15 and a fluororubber O-ring 17. Through the double sealing design of the PEEK seal 15 and the fluororubber O-ring 17, the sealing performance between the baffle 6 and the directional valve housing 1 is improved. The PEEK material has excellent wear resistance and chemical corrosion resistance, and the fluororubber O-ring 17 has good elasticity and sealing performance, which can meet the sealing requirements under different working conditions, reduce the risk of fluid leakage, and maintain the sealing effect even if the sealing components wear to a certain extent during long-term use, thus extending the service life of the sealing components and reducing the maintenance cost and replacement frequency of the equipment.

[0040] The second rotating shaft 18 is fixedly installed on the side wall of the baffle 6, and the bushing 19 is coaxially sleeved on the end of the first rotating shaft 10. The outer side wall of the external hexagon bolt 16 and the inner side wall of the second rotating shaft 18 are threaded together. The second rotating shaft 18 is tightly fixed by the external hexagon bolt 16, which ensures the stability of the equipment during operation.

[0041] The outer wall of the second rotating shaft 18 is provided with a second bolt washer 21, and the PEEK seal 15 and the fluororubber O-ring 17 are coaxially arranged on the outer wall of the second rotating shaft 18, which enhances the reliability of the connection and reduces the occurrence of loosening. During the operation of the directional valve, the second rotating shaft 18 can stably drive the baffle 6 to rotate, so as to achieve accurate control of the fluid direction.

[0042] A discharge hole is provided on the inner side wall of the directional valve housing 1. An L-shaped plate 40 is provided on the side wall of the discharge hole. Multiple guide rods 38 are symmetrically fixed on the inner side wall of the directional valve housing 1. The first moving plate 26 is slidably disposed on the outer side wall of the guide rods 38. Through the cooperation between the guide rods 38 and the first moving plate 26, the guide rods 38 provide guidance for the movement of the first moving plate 26, ensuring that the first moving plate 26 remains stable during movement, reducing the occurrence of deviation or shaking, and improving the stability of the position control of the baffle 6.

[0043] The directional valve housing 1 is provided with a first movable plate 26, and a sealing plate 39 is provided on the side wall of the first movable plate 26. The sealing plate 39 is fixedly installed on the side wall of the first movable plate 26. The sealing plate 39 and the L-shaped plate 40 are adapted to each other. Multiple discharge pipes 41 are symmetrically inserted into the side wall of the directional valve housing 1, and the multiple discharge pipes 41 are respectively connected to channel 2 3 and channel 3 4. When a leak is detected in a certain channel, the first movable plate 26 drives the sealing plate 39 to fit tightly with the L-shaped plate 40, thereby blocking the connection between the leak channel and the outside world, preventing the liquid from further leaking to the outside of the equipment or polluting the surrounding environment. Some liquid will remain in the groove inside the directional valve housing 1, so that the discharge pipe 41 can discharge the leaked liquid in time, reducing the accumulation of liquid inside the equipment and ensuring the normal operation of the equipment.

[0044] The second traction wheel 36 is symmetrically fixedly installed on the inner side wall of the directional valve housing 1. The end of the second traction rope 35 is fixedly installed on the side wall of the baffle 6. The second traction rope 35 is fixedly connected to the end of the first moving plate 26 through the second traction wheel 36. Through the cooperation of the second traction rope 35 and the second traction wheel 36, when the baffle 6 is displaced, the baffle 6 drives the first moving plate 26 to move, so as to realize the rapid contact between the sealing plate 39 and the L-shaped plate 40, effectively blocking the leakage channel, preventing further liquid leakage, improving the leakage response speed, reducing the risk of liquid leakage to equipment and the surrounding environment, ensuring the safety of the food processing process, and facilitating subsequent equipment to detect leaked liquid.

[0045] It should be noted that when the directional valve is operating normally, the second traction rope 36 is in a tensioned state, ensuring that the first moving plate 26 is stable in the initial position and will not affect the normal rotation of the baffle 6 and the control of the fluid delivery direction.

[0046] The diversion valve housing 1 is equipped with a float plate 37 for detecting water volume. The inner sidewall of the diversion valve housing 1 is symmetrically provided with grooves. The slider 33 is slidably disposed on the inner sidewall of the groove. The second moving plate 34 is fixedly disposed on the sidewall of the slider 33. The float plate 37 is fixedly disposed at the bottom of the second moving plate 34. Through the cooperation of the float plate 37 and the second moving plate 34, when liquid leakage occurs inside the diversion valve housing 1, the leaked liquid will accumulate at the bottom of the diversion valve housing 1. As the liquid level rises, the float plate 37 will float upward with the rise of the liquid level. The float plate 37 drives the second moving plate 34 to move upward in the groove through the slider 33.

[0047] The first micro switch 27 and the second micro switch 28 are fixedly installed on the inner wall of the slide groove. The second support rod 30 and the telescopic rod 32 are fixedly installed at the end of the slider 33. The first contact plate 29 is fixedly installed at the end of the second support rod 30, and the second contact plate 31 is fixedly installed at the end of the telescopic rod 32. When the second moving plate 34 drives the slider 33 to move, the slider 33 drives the telescopic rod 32 and the second support rod 30 to move, causing the telescopic rod 32 to drive the second contact plate 31 to trigger the second micro switch 28. This causes the second micro switch 28 to send a signal, indicating that there may be a leak in channel 2 3. If the slider 33 continues to rise, causing the second support rod 30 to drive the first contact plate 29 to trigger the first micro switch 27, it indicates that the leakage in the channel is more serious.

[0048] A rubber strip 42 is provided on the side wall of the baffle 6, and a rubber sealing gasket 43 is fixedly installed on the outer side wall of the rubber strip 42. A sealing movable cavity is opened inside the baffle 6. An electric push rod 46 is fixedly installed on the inner side wall of the sealing movable cavity. The electric push rod 46 is electrically connected to the second micro switch 28. A push plate 45 is fixedly installed at the end of the electric push rod 46. A third support rod 47 is fixedly installed at the output end of the electric push rod 46, and the push plate 45 is fixedly installed at the end of the third support rod 47. The rubber strip 42 is connected to the sealing movable cavity through a connecting pipe 44. The second micro switch 28 transmits a signal to the electric push rod 46. When the electric push rod 46 is activated, its output end pushes the third support rod 47. The third support rod 47 drives the push plate 45 to move. The push plate 45 squeezes the liquid in the sealing movable cavity, causing the rubber strip 42 to deform and expand. The rubber strip 42 drives the rubber sealing gasket 43 to expand, so that the rubber sealing gasket 43 fits against the inner side wall of the directional valve housing 1, enhancing the sealing effect and reducing the possibility of further liquid leakage.

[0049] The electric winch 25 and the first traction wheel 23 are symmetrically fixed on the side wall of the directional valve housing 1. The first traction rope 24 is fixed on the inner side wall of the electric winch 25. The first traction rope 24 is fixedly connected to the first moving plate 26 through the first traction wheel 23. The electric winch 25 is electrically connected to the first micro switch 27. Through the cooperation of the electric winch 25 and the first micro switch 27, when the first micro switch 27 is triggered, it will send a signal to the electric winch 25, and the electric winch 25 will start. Through the cooperation of the first traction rope 24 and the first traction wheel 23, the first moving plate 26 is pulled to move. This enables the first moving plate 26 to release its sealing function when a serious leak is detected, thus ensuring the stability of the food processing process.

[0050] The functional principle of this invention can be explained through the following operational methods:

[0051] Liquid enters the directional valve housing 1 through channel 1 2. Driven by the pneumatic actuator 13, the coupling 14 drives the baffle 6 to rotate, thereby controlling the opening or closing of channel 2 3 and channel 3 4 to meet the needs of different fluid delivery directions. The directional valve housing 1 and the baffle 6 are made of food-grade stainless steel, which has good corrosion resistance and hygiene performance, ensuring that the liquid food will not be contaminated during food processing.

[0052] When the baffle 6 rotates, the PEEK seal 15 and the fluororubber O-ring 17 play a sealing role, effectively preventing fluid leakage. The stability of the rotation of the baffle 6 is ensured by the cooperation of components such as the second rotating shaft 18, the external hex bolt 16, and the second bolt flat washer 21.

[0053] When the baffle 6 rotates, the baffle 6 drives the second traction rope 35 to rotate, so that the second traction rope 35 drives the first moving plate 26 to move through the second traction wheel 36, so that the first moving plate 26 moves on the guide rod 38, so that the first moving plate 26 drives the sealing plate 39 to move, so that the sealing plate 39 releases the sealing effect on the L-shaped plate 40, and the liquid is discharged through the discharge hole.

[0054] On the other side, the first movable plate 26 moves on the guide rod 38 under the action of gravity, so that the first movable plate 26 seals the sealing plate 39 on the other side. If the liquid leaks through the baffle 6, the leaked liquid will enter the discharge hole on the inner wall of the directional valve housing 1. As the liquid accumulates, the float 37 will rise under the buoyancy of the liquid. The second traction rope 35 drives the first movable plate 26 to slide on the guide rod 38. When the sealing plate 39 on the side wall of the first movable plate 26 contacts the L-shaped plate 40, the leakage of liquid to the outside of the equipment is reduced.

[0055] The slider 33 rises in the groove. When it rises to a certain position, the first contact plate 29 and the second contact plate 31 trigger the first micro switch 27 and the second micro switch 28 respectively.

[0056] After the second contact plate 31 triggers the second micro switch 28, the second micro switch 28 activates the electric push rod 46. The electric push rod 46 pushes the third support rod 47 and the push plate 45 to move, causing a pressure change in the liquid in the connecting pipe 44. This causes the rubber belt 42 to deform, and the rubber belt 42 drives the rubber sealing gasket 43 to expand, enhancing the sealing effect on the contact part between the baffle 6 and the diverter valve housing 1, and reducing the possibility of liquid continuing to leak from the rubber sealing gasket 43.

[0057] When excessive leakage occurs and drainage is required, the float 37 moves the second moving plate 34, which in turn moves the slider 33. The telescopic rod 32 deforms, causing the support rod 30 to move the first contact plate 29. This triggers the first micro switch 27, which then activates the electric winch 25. The electric winch 25 pulls the first moving plate 26 via the first traction rope 24 and the first traction wheel 23, releasing the sealing effect of the first moving plate 26 on the L-shaped plate 40. This allows the excessively leaked liquid to be discharged through the discharge pipe 41, preventing excessive accumulation of liquid in the directional valve housing 1 and ensuring the normal operation of the equipment and the safety of the food processing environment.

[0058] When the directional valve needs to be cleaned, the operator can easily clean the inside by opening the quick-opening hand holes 8 on both sides of the directional valve housing 1 without disassembling the entire valve, reducing workload and safety hazards. This allows the operator to perform online cleaning and ensures that the equipment is always kept in good sanitary condition.

[0059] 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. A food-grade plate-type pneumatic directional valve, comprising a directional valve housing (1), characterized in that, The directional valve housing (1) has a channel 1 (2) at one end, a channel 2 (3) and a channel 3 (4) at the bottom, a quick-opening hand hole (8) on both sides, a pneumatic actuator (13) on the side wall of the directional valve housing (1), a baffle (6) inside the directional valve housing (1), the baffle (6) being connected to the pneumatic actuator (13) via a coupling (14), a discharge hole on the inner side wall of the directional valve housing (1), an L-shaped plate (40) on the side wall of the discharge hole, a first moving plate (26) inside the directional valve housing (1), a sealing plate (39) on the side wall of the first moving plate (26), a float plate (37) for detecting water volume inside the directional valve housing (1), and a rubber sealing gasket (43) on the outer side of the baffle (6).

2. The food-grade plate-type pneumatic directional valve according to claim 1, characterized in that, The directional valve housing (1) is provided with a fixed baffle (5). The directional valve housing (1) and the baffle (6) are made of food-grade stainless steel, preferably AISI316L stainless steel.

3. The food-grade plate-type pneumatic directional valve according to claim 1, characterized in that, The side wall of the directional valve housing (1) is provided with a mounting flange (7), a screw rod (9) is inserted into the side wall of the mounting flange (7), a cap nut (12) is provided on the side wall of the mounting flange (7), the cap nut (12) is threadedly connected to the outer side wall of the screw rod (9), a first bolt washer (11) is provided on the outer side wall of the cap nut (12), and the side wall of the pneumatic actuator (13) is connected to the mounting flange (7).

4. A food-grade plate-type pneumatic directional valve according to claim 1, characterized in that, The coupling (14) has a first rotating shaft (10) coaxially at its end, and a torque output shaft (20) coaxially at its end. The inner wall of the torque output shaft (20) is provided with an internal hex bolt (22).

5. A food-grade plate-type pneumatic directional valve according to claim 1, characterized in that, The side wall of the baffle (6) is provided with a PEEK seal (15) and a fluororubber O-ring (17). The side wall of the baffle (6) is provided with a second rotating shaft (18). The end of the first rotating shaft (10) is coaxially provided with a bushing (19). The inner side wall of the second rotating shaft (18) is coaxially provided with an external hexagonal bolt (16). The outer side wall of the second rotating shaft (18) is provided with a second bolt washer (21). The PEEK seal (15) and the fluororubber O-ring (17) are coaxially provided on the outer side wall of the second rotating shaft (18).

6. A food-grade plate-type pneumatic directional valve according to claim 1, characterized in that, The inner wall of the directional valve housing (1) is symmetrically provided with multiple guide rods (38), the first moving plate (26) is slidably disposed on the outer wall of the guide rods (38), the sealing plate (39) is installed on the side wall of the first moving plate (26), the sealing plate (39) and the L-shaped plate (40) are adapted to each other, and multiple discharge pipes (41) are symmetrically inserted into the side wall of the directional valve housing (1).

7. A food-grade plate-type pneumatic directional valve according to claim 1, characterized in that, The inner wall of the directional valve housing (1) is symmetrically provided with a second traction wheel (36), and the side wall of the baffle (6) is provided with a second traction rope (35). The second traction rope (35) is connected to the first moving plate (26) through the second traction wheel (36).

8. A food-grade plate-type pneumatic directional valve according to claim 1, characterized in that, The inner wall of the directional valve housing (1) is symmetrically provided with sliding grooves, the inner wall of the sliding groove is provided with a slider (33), the side wall of the slider (33) is provided with a second moving plate (34), and the bottom of the second moving plate (34) is provided with a float plate (37).

9. A food-grade plate-type pneumatic directional valve according to claim 8, characterized in that, The inner wall of the slide is provided with a first micro switch (27) and a second micro switch (28). The end of the slider (33) is provided with a second support rod (30) and a telescopic rod (32). The end of the second support rod (30) is provided with a first contact plate (29), and the end of the telescopic rod (32) is provided with a second contact plate (31).

10. A food-grade plate-type pneumatic directional valve according to claim 9, characterized in that, The directional valve housing (1) is symmetrically provided with an electric winch (25) and a first traction wheel (23) on its side wall. The electric winch (25) is provided with a first traction rope (24). The first traction rope (24) is connected to the first moving plate (26) through the first traction wheel (23). The electric winch (25) is electrically connected to the first micro switch (27).

11. A food-grade plate-type pneumatic directional valve according to claim 10, characterized in that, The side wall of the baffle (6) is provided with a rubber strip (42), and the rubber sealing gasket (43) is fixedly installed on the outer side wall of the rubber strip (42). A sealing movable cavity is opened in the baffle (6), and an electric push rod (46) is provided on the inner side wall of the sealing movable cavity. The electric push rod (46) is electrically connected to the second micro switch (28). A third support rod (47) is provided at the output end of the electric push rod (46), and a push plate (45) is provided at the end of the third support rod (47). The rubber strip (42) is connected to the sealing movable cavity through a connecting pipe (44).

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