Direct-current rotary plate valve for chemical production and use method of direct-current rotary plate valve

Abstract

The invention relates to a direct-flow rotary plate valve for chemical production and a using method thereof.The direct-flow rotary plate valve comprises a valve body, the valve body is provided with a direct-flow channel in the axial direction, a valve seat is fixedly arranged in the direct-flow channel, and a valve plate matched with the valve seat in a sealed mode is arranged in the valve body. The direct-flow rotary plate valve is characterized in that the valve plate is rotationally connected with the valve body through a first shaft body, and a valve rod is arranged on the face, away from the valve seat, of the valve plate; a guide sliding groove is formed in the side wall, away from the valve seat, of the valve plate, one end of the valve rod is rotationally and slidably connected with the guide sliding groove through a second shaft body, the second shaft body is parallel to the first shaft body, and the other end of the valve rod obliquely extends out of the valve body. The valve plate can be driven to rotate by pulling the valve rod to linearly slide, opening and closing sealing of the direct flow channel of the valve body is achieved, opening and closing of the direct flow channel by the valve plate are quicker and more direct, the lifting mode is more labor-saving and convenient to use, and the sealing performance is improved through sealing fit of the valve plate and the valve seat.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, in particular to a direct current rotary plate valve for chemical production and a use method thereof. Background Art

[0002] In chemical production, the valve plate of the existing gate valve is usually an up and down lifting structure, and the medium flow channel of the valve body is opened or closed by lifting the valve plate. This structure requires expansion and sealing when the valve is closed, and the friction force increases when opening, making it difficult to open and easily damaging the sealing surface. In addition, the sealing between the valve plate and the medium flow channel is not high, and still needs to be improved. Summary of the Invention

[0003] The present invention addresses the shortcomings of existing technologies and provides a direct current rotary vane valve for chemical production and its use method. The valve plate provides a tight seal, which is less susceptible to damage to the sealing surface. A balancing structure balances the pressure across the valve plate, facilitating easy opening of the valve plate. This makes valve operation safer and more reliable, and provides enhanced sealing for toxic, hazardous, flammable, and explosive fluids generated in chemical production.

[0004] The present invention is achieved through the following technical solution: a DC rotary plate valve for chemical production, comprising a valve body, a DC channel provided in the valve body along the axial direction, a valve seat fixed in the DC channel, a valve plate provided in the valve body and sealingly matched with the valve seat, the valve plate being rotatably connected to the valve body through a first shaft, a valve stem being provided on a side of the valve plate away from the valve seat, a guide groove being provided on the side wall of the valve plate, one end of the valve stem being rotatably and slidably connected to the guide groove through a second shaft, the second shaft being parallel to the first shaft, and the other end of the valve stem extending obliquely to the outside of the valve body.

[0005] When using this solution, by pulling the valve stem, the valve stem slides along the valve body, and the valve plate is driven to rotate around the first axis to open or seal the DC channel. The valve plate opens and closes the DC channel more quickly and directly, and the lifting and pulling method is more labor-saving and easy to use.

[0006] As an optimization, the valve body is provided with a hinge hole that mates with the first shaft, and the diameter of the hinge hole is larger than the outer diameter of the first shaft. In this optimization solution, the first shaft can move axially within the hinge hole, thereby enabling the valve plate to move axially. As a result, when the valve plate rotates to close, it can move toward the valve seat, thereby compressing the sealing ring on the valve seat and further improving sealing performance.

[0007] As an optimization, a guide sleeve is fixed to the outer wall of the valve body, through which the valve stem extends to the exterior of the valve body. A sealing ring is fixed to the inner wall of the guide sleeve, which seals with the valve stem. This optimized solution allows the valve stem to slide along the guide sleeve, providing greater stability, and the sealing ring ensures a tight seal between the valve stem and the guide sleeve.

[0008] As an optimization, a vertical first connecting pipe is fixedly connected to the outer wall of the valve body, and the first connecting pipe is connected to the cavity on the side of the valve seat away from the valve plate. A horizontal second connecting pipe is fixedly connected to the first connecting pipe, and the second connecting pipe is connected to the cavity on the side of the valve seat close to the valve plate. A gate ring is fixedly connected in the first connecting pipe, and the height of the gate ring is lower than the height of the inner cavity of the second connecting pipe. A sliding rod that slides up and down is provided in the first connecting pipe, and a sealing cap that seals with the gate ring is fixedly connected to the lower end of the sliding rod. In this optimization solution, when fluid is passed into the direct current channel, the fluid pressure is very high, which makes it inconvenient to open the valve plate. At this time, by pulling up the sealing cap, the inner cavities of the first connecting pipe and the second connecting pipe are connected, so that the cavities on both sides of the valve seat are connected, so that the fluid first passes through the conduction of the first connecting pipe and the second connecting pipe, so that the pressure on both sides is balanced, thereby facilitating the opening of the valve plate.

[0009] As an optimization, two valve seats are distributed axially in the direct current channel, and the valve plates are provided on the sides of the two valve seats that are away from each other. This optimization solution achieves bidirectional sealing of the direct current channel through the one-to-one sealing cooperation between the two valve seats and the two valve plates, thereby improving the sealing performance.

[0010] As an optimization, the valve body is equipped with a vent pipe and an exhaust pipe, both of which are connected to the cavity between the two valve seats and are equipped with on-off valves. This optimization solution creates a cavity between the two valve seats when the two valve plates are closed. High-pressure gas is introduced into the cavity through the vent pipe, making it airtight. This prevents harmful, flammable, and explosive fluids from chemical production from escaping into the cavity, improving the sealing effect.

[0011] As an optimization, a partition is fixedly attached to the direct current channel, dividing it into multiple sub-channels. Each sub-channel is equipped with a valve seat, and each valve seat has a corresponding valve plate. This optimization solution is suitable for large-diameter valve bodies, where the medium flow rate is high. By providing multiple sub-channels to partially discharge the flow of the direct current channel, the flow of high-flow media can be easily controlled.

[0012] As an optimization, the partition is an I-shaped structure, and the DC channel is divided by the partition to form two sub-channels distributed vertically. This optimization solution can divide the DC channel into two sub-channels by using an I-shaped partition, and the medium flows separately.

[0013] As an optimization, hollow guide posts are provided on the outer walls of the valve body and the second shaft body on both sides opposite each other. The inner cavity of the guide post and the direct current channel are connected through a guide through-hole. The extension direction of the guide through-hole is the same as that of the guide post. The valve plate located below is rotatably connected to the partition. The two ends of the second shaft body connected to this valve plate extend through the guide through-holes into the inner cavity of the guide post. Valve stems are fixed to both ends of the second shaft body. The two valve stems are respectively sealed and slidably connected to the two guide posts. This optimization solution displaces the valve stem connected to the lower valve plate into the guide post by providing guide posts on both sides of the valve body, thereby facilitating the end of the valve stem to extend to the outside of the valve body.

[0014] As an optimization, the partition is a "cross" structure, and the direct current channel is divided into four sub-channels by the partition. This optimization solution further divides the direct current channel by increasing the number of sub-channels, thereby improving the flow control effect.

[0015] As an optimization, the valve seat is hollow, with a hollow double-layer sealing ring fixedly attached to the side of the valve seat facing the valve plate. The inner cavity of the valve seat communicates with the double-layer sealing ring cavity via a vent. An air inlet pipe, connected to the inner cavity of the valve seat, is fixedly attached to the outer wall of the valve body, and an on-off valve is mounted on the air inlet pipe. This optimization solution allows high-pressure gas to be injected into the inner cavity of the valve seat through the air inlet pipe, which then enters the cavity of the double-layer sealing ring through the vent. When the valve plate and the double-layer sealing ring are in sealing contact, the high-pressure gas seal further creates an airtight state between the valve plate and the double-layer sealing ring, preventing toxic, harmful, flammable, and explosive fluids from chemical production from overflowing into the cavity and improving the sealing effect.

[0016] As an optimization, two rollers are rotatably mounted on the sidewall of the valve plate away from the valve seat. The two rollers respectively contact the inner walls of the valve body on both sides. This optimization solution reduces friction during valve plate rotation through the rolling support of the rollers, making the valve plate rotate more smoothly and improving durability.

[0017] A method for using the above-mentioned DC rotary plate valve for chemical production comprises the following steps: driving the valve stem to slide along the guide sleeve in a direction away from the valve seat, thereby driving the valve plate to rotate around the first axis (8), opening the valve seat, and opening the valve; driving the valve stem to slide along the guide sleeve in a direction close to the valve seat, thereby driving the valve plate to rotate around the first axis, causing the valve plate to seal the valve seat, and closing the valve.

[0018] The beneficial effects of the present invention are as follows: by pulling the valve stem to slide along the straight line of the valve body, the valve plate can be driven to rotate, thereby pressing and sealing the valve seat, and not easily damaging the sealing surface; and the valve plate adopts an oblique pulling opening and closing method, which makes opening and closing faster and more direct, and easy to use; and the sealing performance is improved by the sealing cooperation between the valve plate and the valve seat; The sealing effect is further improved by arranging two valve plates in the axial direction of the valve body to seal the two valve seats respectively; The balancing structure formed by the first connecting pipe and the second connecting pipe can balance the pressure before and after the valve plate, making the valve plate easy to open and the valve operation safer and more reliable; By arranging two valve plates in the radial direction of the valve body, two branch channels can be opened respectively, thereby facilitating the control of the flow rate of a large flow medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional view of Example 1; Figure 2 for Figure 1 A magnified view of part A; Figure 3 is a cross-sectional view of Example 2; Figure 4 for Figure 3 A magnified view of part B; Figure 5 is a cross-sectional view of Example 3; Figure 6 is a cross-sectional view of Example 4; Figure 7 is a side view of Example 4; Figure 8 for Figure 7 Magnified view of part C; Figure 9 is a side view of Example 5; Figure 10 is a cross-sectional view of Example 6; Figure 11 It is a front view of Example 6; Figure 12 is a side view of Example 6; Figure 13 It is a side partial cross-sectional view of Example 6; Figure 14 is a cross-sectional view of the guide column; As shown in the figure: 1. Valve body, 2. DC channel, 3. Valve seat, 4. Single-layer sealing ring, 5. Valve plate, 6. C-type bracket, 7. Second axis, 8. First axis, 9. Valve stem, 10. Valve cover, 11. Guide sleeve, 12. Inspection port, 13. Sealing ring, 14. Partition, 15. Branch channel, 16. Guide column, 17. Guide through hole, 18. Guide slide, 19. Hinge hole, 20. First connecting pipe, 21. Second connecting pipe, 22. Gate ring, 23. Sealing cap, 24. Slide rod, 25. Vent pipe, 26. Exhaust pipe, 27. Switch valve, 28. Double-layer sealing ring, 29. Vent hole, 30. Inlet pipe, 31. Roller, 32. Cleaning port. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0021] Example 1: like Figures 1-2 The figure shows a DC rotary vane valve for chemical production, comprising a valve body 1, with a DC passage 2 axially defined therein. A valve seat 3 is fixedly disposed within the DC passage 2. A valve plate 5 is disposed within the valve body 1 and sealably engages with the valve seat 3. The valve plate 5 is rotatably connected to the valve body 1 via a first shaft 8. A valve stem 9, which drives the valve stem in rotation, is disposed on a surface of the valve plate 5 remote from the valve seat 3. A guide slot 18 is disposed on a surface of the valve plate 5 remote from the valve seat 3. One end of the valve stem 9 is rotatably and slidably connected to the guide slot 18 via a second shaft 7. The second shaft 7 is parallel to the first shaft 8, and the other end of the valve stem 9 extends obliquely to the exterior of the valve body 1.

[0022] Specifically, the valve seat 3 described in this embodiment is an annular structure. The outer diameter of the valve seat 3 matches the inner diameter of the direct current passage 2. The valve seat 3 is secured by affixing the circumferential outer wall of the valve seat 3 to the circumferential inner wall of the direct current passage 2. An annular groove is defined inwardly on the side of the valve seat 3 adjacent to the valve plate 5, within which a single-layer sealing ring 4 is affixed. The outer diameter of the valve plate 5 matches that of the valve seat 3. When the valve plate 5 is rotated to close, the sidewall of the valve plate 5 and the single-layer sealing ring 4 engage, achieving a seal between the two, thereby sealing the direct current passage 2.

[0023] The valve body 1 is provided with a hinge hole 19 that cooperates with the first shaft body 8. The aperture of the hinge hole 19 is larger than the outer diameter of the first shaft body 8. Specifically, the first shaft body 8 is a circular shaft, the valve plate is fixedly connected to the first shaft body, and a connecting seat is fixedly connected to the valve body 1. The hinge hole 19 is opened on the connecting seat, and the first shaft body 8 is passed through the hinge hole 19 to realize the rotational connection between the valve plate and the valve body. In this embodiment, the hinge hole 19 is a long hole extending axially along the valve body 1. The aperture of the hinge hole is larger than the outer diameter of the first shaft body, so that the first shaft body 8 can move axially in the hinge hole 19, and then the valve plate 5 can be displaced axially. In this way, when the valve plate 5 rotates and closes, the valve plate 5 can move in the direction close to the valve seat 3, thereby pressing the sealing ring 4 on the valve seat 3 to improve the sealing performance.

[0024] Specifically, two C-shaped brackets 6 are distributed and fixedly connected to the side wall of the valve plate 5. The inner cavity of the C-shaped bracket 6 forms the guide slot 18. Because the first shaft 8 of this embodiment is disposed at the upper end of the valve plate 5, the guide slot 18 extends in the vertical direction, so that when the valve stem 9 slides along the guide slot 18, it can drive the rotation of the valve plate 5.

[0025] Specifically, the second shaft body 7 is a round shaft, and the second shaft body 7 is sequentially arranged in the inner cavity of the two C-shaped brackets 6, so that the second shaft body 7 can slide along the guide groove 18. And because the second shaft body 7 is a round shaft, the second shaft body 7 can rotate in the guide groove 18.

[0026] One end of the valve stem 9 is located between the two C-shaped brackets 6 and is movably connected to the second shaft. A through hole is provided at the end of the valve stem for the second shaft to pass through. The second shaft 7 passes through the inner cavity of the C-shaped bracket 6 and the through hole at the end of the valve stem 9 in sequence, thereby achieving a rotational and sliding connection between the valve stem 9 and the guide groove 18. The other end of the valve stem 9 extends toward the side of the first shaft 8 and away from the valve plate 5 to the outside of the valve body 1, and the angle between the valve stem 9 and the central axis of the direct current channel 2 is 30° to 60°. In this way, when the valve stem 9 tilts and slides outward, the second shaft 7 can provide an oblique pulling force to the valve plate 5, thereby pulling the valve plate 5 to rotate.

[0027] A guide sleeve 11 is fixedly connected to the outer wall of the valve body 1. The valve stem 9 extends through the guide sleeve 11 to the outside of the valve body 1. A sealing ring 13 is fixedly provided on the inner wall of the guide sleeve 11 to seal with the valve stem 9. The valve stem 9 slides within the guide sleeve 11 to achieve a sliding connection with the valve body. The sealing ring 13 is used to seal between the valve stem 9 and the guide sleeve 11, thereby improving the sealing performance.

[0028] Specifically, the left and right ends of the valve body 1 serve as a medium outlet and inlet, respectively, forming a direct current channel 2 between the two. The valve body 1 is provided with an access port 12 perpendicular to the direct current channel 2, forming an inverted T-shaped flow passage with the direct current channel 2. The end of the access port 12 is secured to a valve cover 10 via bolts, sealing the access port 12 and preventing medium leakage. The interior of the valve body 1 can be easily inspected and maintained by removing the valve cover 10, providing convenient access.

[0029] In this embodiment, a valve seat 3 is fixedly provided in the direct current channel 2, and a valve plate 5 is correspondingly provided on one side of the valve seat 3. The first shaft 8 is fixedly connected to the upper end of the valve plate 5. A valve cover 10 is installed on the top of the valve body 1. The valve stem 9 connected to the valve plate 5 is tilted upward and extends to the outside through the guide sleeve 11.

[0030] During use, flanges can be welded to the media outlet and inlet of the valve body 1 to facilitate connection to other equipment. A linear drive mechanism can be installed on the valve body. This linear drive mechanism can utilize a telescopic cylinder or a nut-screw pair, which is conventional technology. This linear drive mechanism drives the valve stem 9 to slide along the guide sleeve 11, opening or closing the valve.

[0031] In this embodiment, due to the need for equipment safety, the second shaft 7 is removable during valve installation, allowing it to be withdrawn, allowing the valve plate 5 to rotate freely. The medium enters the valve plate from the side away from the valve stem, and the medium's flow rate pushes the valve plate open, achieving self-opening. In the event of an equipment malfunction, medium delivery ceases, and the valve plate rapidly descends under its own weight, closing the valve and achieving self-closing. Simultaneously, the valve stem is driven to further tighten the valve plate, ensuring greater safety and reliability.

[0032] A method for using a DC rotary vane valve for chemical production includes the following steps: driving the valve stem 9 to slide along the guide sleeve 11 in a direction away from the valve seat 3, thereby driving the valve plate 5 to rotate around the first axis 8, opening the valve seat 3, and opening the valve; driving the valve stem 9 to slide along the guide sleeve 11 in a direction close to the valve seat 3, thereby driving the valve plate 5 to rotate around the first axis, the valve plate 5 seals the valve seat 3, and the valve is closed.

[0033] Example 2: like Figure 3 、 4 As shown, the difference between this embodiment and Example 1 is that a vertical first connecting pipe 20 is fixedly connected to the outer wall of the valve body 1 in this embodiment. The first connecting pipe 20 communicates with the cavity on the side of the valve seat 3 away from the valve plate 5. A horizontal second connecting pipe 21 is fixedly connected to the first connecting pipe 20. The second connecting pipe 21 communicates with the cavity on the side of the valve seat 3 near the valve plate 5. A gate ring 22 is fixedly connected to the inside of the first connecting pipe 20. The gate ring 22 is lower than the height of the inner cavity of the second connecting pipe 21. A sliding rod 24 is provided in the first connecting pipe 20, and a sealing cap 23 is fixedly connected to the lower end of the sliding rod 24 to seal with the gate ring 22.

[0034] In this embodiment, the upper end of the first connecting tube 20 is sealed, and the lower end of the first connecting tube 20 is fixedly connected to the valve body 1. The inner cavity of the first connecting tube 20 is connected to the direct current channel cavity on the right side of the valve seat 3. The second connecting tube 21 is perpendicular to the first connecting tube 20. One end of the inner cavity of the second connecting tube 21 is connected to the inner cavity of the first connecting tube 20, and the other end is connected to the inspection port 12. When the slide rod 24 slides upward, the sealing cap 23 moves upward to open the gate ring 22, thereby connecting the inner cavities of the first connecting tube 20 and the second connecting tube 21. Conversely, when the slide rod slides downward, the sealing cap moves downward to seal with the gate ring, isolating the inner cavities of the first and second connecting tubes.

[0035] During use, when fluid flows into the direct current channel, the fluid pressure is very high, which may make it difficult to open the valve plate 5. At this time, by sliding and pulling up the sealing cap 23, the inner cavities of the first connecting tube 20 and the second connecting tube 21 are connected to form a balanced structure, thereby connecting the cavities on both sides of the valve seat 3. The fluid can pass through the first and second connecting tubes, and the pressure on both sides is balanced, thus facilitating the opening of the valve plate 5 and saving more effort.

[0036] Example 3: like Figure 5 As shown, this embodiment differs from Embodiment 1 in that two valve seats 3 are axially distributed within the direct current passage 2 in this embodiment, and the valve plates 5 are provided on the opposite sides of the two valve seats 3. In this embodiment, the two valve plates 5 seal the two valve seats 3, achieving bidirectional sealing of the direct current passage 2 and improving the sealing effect.

[0037] Preferably, the valve body 1 of this embodiment is provided with a vent pipe 25 and an exhaust pipe 26 , both of which are connected to the cavity between the two valve seats 3 , and each of which is provided with a switch valve 27 .

[0038] Preferably, a cleaning port 32 is provided at the bottom of the valve body 1 in this embodiment, and a valve cover 10 is fixed to the cleaning port 32 by bolts.

[0039] During use, when the two valve plates 5 are closed, a cavity is formed between the two valve seats 3, and the valve plates 5 and the valve seats 3 are sealed, thereby forming a first sealing structure. At this time, high-pressure gas is introduced into the cavity between the two valve seats 3 through the vent pipe 25, making the cavity airtight. Since the pressure of the high-pressure gas is greater than the pressure of toxic gases such as sulfur monoxide and sulfur dioxide generated in chemical production, it can prevent toxic and harmful gases from overflowing into the cavity, thereby forming a second sealing structure. The sealing effect is improved by the two sealing structures. The exhaust pipe 26 can be connected to a toxic and harmful gas monitoring device, and leakage after the valve is closed can be remotely monitored.

[0040] When the equipment is out of service, the valve can be closed and pressure can be applied through the vent pipe 25 to check the tightness of the sealing surface. After the outage, the cleaning port 32 can be opened to remove the dust accumulated in the valve.

[0041] Example 4: like Figure 6 、 7 As shown in Figures 8 and 9, this embodiment differs from Example 1 in that a partition 14 is fixedly attached to the direct current channel 2. The partition 14 divides the direct current channel into multiple sub-channels 15. A valve seat 3 is fixedly installed in each sub-channel 15, and each valve seat 3 is correspondingly provided with a valve plate 5. The outer diameter of the valve seat 3 matches the inner diameter of the sub-channel 15, and the circumferential outer wall of the valve seat 3 is fixedly attached to the circumferential inner wall of the sub-channel 15. By providing multiple sub-channels 15, the flow of the direct current channel 2 is partially discharged, thereby facilitating the control of the flow of high-flow media.

[0042] Specifically, the partition 14 in this embodiment has an I-shaped structure. The direct current channel 2 is divided by the partition 15 into two sub-channels 15, one above the other. A valve seat 3 is fixedly connected to each of the sub-channels 15. The valve body 1 is provided with two valve plates 5, each of which seals against the two valve seats 3. The two valve plates 5 are located on the same side of the valve seats 3. The two valve plates 5 seal the two sub-channels 15 separately, thereby sealing the direct current channel 2.

[0043] Preferably, a cleaning port 32 is provided at the bottom of the valve body 1 in this embodiment, and a valve cover 10 is fixed to the cleaning port 32 by bolts.

[0044] Preferably, the valve seat 3 of this embodiment is hollow, and a hollow double-layer sealing ring 28 is fixedly attached to the side of the valve seat 3 facing the valve plate. The inner cavity of the valve seat 3 communicates with the cavity of the double-layer sealing ring 28 via a vent 29. An air inlet pipe 30 is fixedly attached to the outer wall of the valve body 1 and communicates with the inner cavity of the valve seat 3. The on-off valve 27 is mounted on the air inlet pipe 30.

[0045] When the valve plate 5 is closed, a primary seal is formed between the valve plate 5 and the double-layer sealing ring 28. At this point, high-pressure gas is introduced into the inner cavity of the valve seat 3 through the air inlet pipe 30, and the high-pressure gas enters the cavity of the double-layer sealing ring 28 through the air vent 29. When the valve plate 5 and the double-layer sealing ring 28 are in sealed contact, the high-pressure gas seal further creates an airtight state between the valve plate 5 and the double-layer sealing ring 28, thus forming a secondary seal. This prevents toxic gases from chemical production from escaping into the cavity, and the dual seals enhance the sealing effect. Alternatively, the air inlet pipe 30 can be used to monitor leaks after the valve is closed and to perform tightness tests after shutdown.

[0046] Preferably, in this embodiment, two rollers 31 are rotatably mounted on the sidewall of the valve plate 5 away from the valve seat 3. The two rollers 31 respectively contact the inner walls of the valve body 1 on both sides. When the valve plate 5 rotates, the rollers 31 roll along the inner wall of the valve body 1. The support of the rollers 31 reduces friction during the rotation of the valve plate 5, making the valve plate 5 rotate more smoothly and improving its durability.

[0047] In this embodiment, the upper end of the upper valve plate 5 is fixedly connected to the first shaft body 8, and the lower end of the lower valve plate 5 is fixedly connected to the first shaft body 8. The top and bottom of the valve body 1 are respectively provided with the valve cover 10. The valve stem 9 connected to the upper valve plate 5 extends upward through the valve body 1 to the outside, and the valve stem 9 connected to the lower valve plate 5 extends downward through the valve body 1 to the outside.

[0048] This embodiment is suitable for large-diameter valve bodies 1, where medium flow rates are high. Two valve plates 5 can be used to open two branch channels 15, respectively, to facilitate control of the flow rate of this high-flow medium. For example, when a low flow rate is required, only the upper valve plate 5 can be opened, allowing only half of the medium to flow out through the upper branch channels 15. When a high flow rate is required, both valve plates 5 can be opened, allowing the entire medium in the direct flow channel 2 to flow out. Example 5: like Figure 9 As shown, this embodiment differs from Example 4 in that the partition plate is a cross-shaped structure, and the direct current channel is divided into four sub-channels by the partition plate. Each of the four sub-channels 15 is fixedly connected to a valve seat 3. The valve body 1 is provided with four valve plates 5, and the four valve plates 5 and the four valve seats 3 are sealed one by one. The four valve plates 5 seal the four sub-channels 15 separately, thereby sealing the direct current channel 2. By increasing the number of sub-channels, flow control accuracy is improved.

[0049] Example 6: like Figures 10-14 As shown, the difference between this embodiment and embodiment 4 is that the upper end of the lower valve plate 5 is fixedly connected to the first shaft 8, and the lower valve plate is rotatably connected to the partition plate 14 through the first shaft.

[0050] In this embodiment, hollow guide columns 16 are provided on the outer walls on both sides opposite to each other at both ends of the valve body 1 and the second shaft body 7. The inner cavity of the guide column 16 and the direct current channel 2 are connected through a guide through hole 17. The extension direction of the guide column 16 is the same as the inclination direction of the valve stem 9, and the extension direction of the guide through hole 17 is the same as the extension direction of the guide column 16.

[0051] The ends of the second shaft 7, connected to the lower valve plate 5, extend through two guide holes 17 and into the inner cavities of two guide posts 16. A valve stem 9 is fixedly connected to each end of the second shaft 7, and the two valve stems 9 are respectively in sealed sliding connection with the two guide posts 16. In this embodiment, the valve stem 9 extends upward through the guide posts 16 and outward. The inner cavities of the guide posts 16 are fixed with a sealing ring 13 that seals with the valve stem 9.

[0052] By providing guide posts 16 on both sides of the valve body 1, the valve stem 9 connected to the lower valve plate 5 is shifted into the guide posts 16, thereby facilitating the extension of the valve stem 9 to the exterior of the valve body 1. Consequently, when the valve stem 9 slides along the guide posts 16, the second rotating shaft 7 can move along the guide through-hole 17, thereby driving the rotation of the lower valve plate 5. Because the valve stem of the lower valve plate of this embodiment is positioned on the side of the valve body, the overall size of the valve is reduced, minimizing space requirements.

[0053] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A direct current rotary vane valve for chemical production, comprising a valve body (1), the valve body (1) being provided with a direct current passage (2) along the axial direction, a valve seat (3) being fixedly provided in the direct current passage, and a valve plate (5) being provided in the valve body (1) and sealingly cooperating with the valve seat (3), characterized in that: The valve plate (5) is rotatably connected to the valve body (1) via a first shaft (8); a valve stem (9) is provided on a side of the valve plate (5) away from the valve seat; a guide groove (18) is provided on a side of the valve plate (5) away from the valve seat; one end of the valve stem (9) is rotatably and slidably connected to the guide groove (18) via a second shaft (7); the second shaft (7) is parallel to the first shaft (8); and the other end of the valve stem (9) extends obliquely to the outside of the valve body (1).

2. The DC rotary vane valve for chemical production according to claim 1, characterized in that: The valve body (1) is provided with a hinge hole (19) that cooperates with the first shaft body (8), and the diameter of the hinge hole is larger than the outer diameter of the first shaft body (8).

3. The direct current rotary vane valve for chemical production according to claim 1 or 2, characterized in that: A guide sleeve (11) is fixedly connected to the outer wall of the valve body (1), the valve stem (9) passes through the guide sleeve (11) and extends to the outside of the valve body (1), and a sealing ring (13) is fixedly provided on the inner wall of the guide sleeve (11) and is in sealing cooperation with the valve stem (9).

4. The DC rotary vane valve for chemical production according to claim 1, characterized in that: A vertical first connecting tube (20) is fixedly connected to the outer wall of the valve body (1), and the first connecting tube is connected to the cavity on one side of the valve seat (3). A horizontal second connecting tube (21) is fixedly connected to the first connecting tube (20), and the second connecting tube is connected to the cavity on the other side of the valve seat (3). A gate ring (22) is fixedly connected to the inside of the first connecting tube (20), and the height of the gate ring is lower than the height of the inner cavity of the second connecting tube (21). A sliding rod (24) that slides up and down is provided in the first connecting tube (20), and a sealing cap (23) that seals with the gate ring (22) is fixedly connected to the lower end of the sliding rod.

5. The DC rotary vane valve for chemical production according to claim 1, characterized in that: Two valve seats (3) are distributed axially in the direct current channel (2), and the valve plates (5) are correspondingly provided on the sides of the two valve seats that are away from each other.

6. The DC rotary vane valve for chemical production according to claim 5, characterized in that: The valve body (1) is provided with a vent pipe (25) and an exhaust pipe (26), both of which are connected to the cavity between the two valve seats (3), and each of which is provided with an on-off valve (27).

7. The DC rotary vane valve for chemical production according to claim 1, characterized in that: A partition (14) is fixedly connected in the direct current channel (2), and the partition (14) divides the direct current channel (2) into a plurality of sub-channels (15). A valve seat (3) is fixed in each sub-channel, and each valve seat is correspondingly provided with a valve plate (5).

8. The DC rotary vane valve for chemical production according to claim 7, characterized in that: The partition (14) is an "I"-shaped structure, and the direct current channel is divided by the partition to form two sub-channels distributed up and down.

9. The DC rotary vane valve for chemical production according to claim 8, characterized in that: Hollow guide columns (16) are provided on the outer walls of both sides opposite to each other at both ends of the valve body (1) and the second shaft body (7). The inner cavity of the guide column (16) and the direct current channel (2) are connected through the guide through hole (17). The extension direction of the guide through hole (17) is the same as the extension direction of the guide column (16). The valve plate (5) below is rotatably connected to the partition (14). The two ends of the second shaft body (7) connected to this valve plate (5) respectively pass through the guide through hole (17) and extend into the inner cavity of the guide column (16). The two ends of the second shaft body (7) are fixed with valve stems (9). The two valve stems (9) are respectively sealed and slidably connected to the two guide columns (16).

10. The DC rotary vane valve for chemical production according to claim 7, characterized in that: The partition (14) is a "cross"-shaped structure, and the direct current channel is divided by the partition to form four sub-channels.

11. The direct current rotary vane valve for chemical production according to any one of claims 7 to 10, characterized in that: The valve seat (3) is hollow, and a hollow double-layer sealing ring (28) is fixedly connected to the side of the valve seat (3) facing the valve plate (5). The inner cavity of the valve seat (3) is connected to the cavity of the double-layer sealing ring (28) through the vent hole (29). An air inlet pipe (30) connected to the inner cavity of the valve seat (3) is fixedly connected to the outer wall of the valve body (1), and a switch valve (27) is installed on the air inlet pipe (30).

12. The direct current rotary vane valve for chemical production according to any one of claims 7 to 10, characterized in that: Two rollers (31) are rotatably mounted on the side wall of the valve plate (5) away from the valve seat (3), and the two rollers (31) are in contact with the inner walls on both sides of the valve body (1) respectively.

13. The method for using the direct current rotary vane valve for chemical production according to any one of claims 1 to 10, characterized in that: The following steps are involved: By driving the valve stem (9) to slide along the guide sleeve (11) in a direction away from the valve seat (3), the valve plate (5) is driven to rotate around the first shaft (8), the valve seat (3) is opened, and the valve is opened; by driving the valve stem (9) to slide along the guide sleeve (11) in a direction close to the valve seat (3), the valve plate (5) is driven to rotate around the first shaft (8), the valve plate (5) seals the valve seat (3), and the valve is closed.

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