Special knife-shaped gate valve for desulfurization and denitrification

Abstract

The invention relates to the field of gate valves, and particularly discloses a special knife-shaped gate valve for desulfurization and denitrification, which comprises a valve body, the valve body is provided with a through port for fluid to pass through, the valve body is provided with a control assembly for controlling the on-off of the through port, the two sides of the valve body are provided with adjusting assemblies, the adjusting assemblies are provided with pushing assemblies, and the pushing assemblies are arranged on the valve body. A sealing assembly is arranged at the output end of the pushing assembly, and a pressure storage assembly connected with the control assembly is arranged on the valve body. In the returning process of the control assembly, the functions of three-stage contact between the sealing assembly and the control assembly and residual fluid cleaning can be achieved, the attached residual fluid in the returning process of the control assembly is reduced, the phenomenon of fluid accumulation in the valve body is reduced, and therefore the possibility of valve body blockage is reduced, and the service life of the valve body is prolonged. Workers can control and operate the knife-shaped gate valve conveniently, the service life of the knife-shaped gate valve is prolonged, and the maintenance cost of the knife-shaped gate valve is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, in particular to a knife-shaped gate valve dedicated to desulfurization and denitrification. Background Art

[0002] Desulfurization and denitrification are important processes in industrial waste gas treatment, which are used to reduce the emission of sulfur dioxide and nitrogen oxides generated during the combustion process. A large amount of solid particles, such as limestone powder or catalyst debris, are involved in this process. The knife gate valve is a specially designed valve, which is mainly used to control and regulate the flow of fluids containing solid particles, fibers or other suspended matter. Therefore, in the process of desulfurization and denitrification, special knife gate valves are usually used for control and regulation, which are used to handle high-viscosity media or working conditions with large solid particles.

[0003] In the existing patent CN211624240U, a knife-shaped gate valve is disclosed, including a valve body, a valve plate is arranged in the valve body, a bracket is connected to the upper end of the valve body, a hand wheel is fixed to the upper end of the bracket, the hand wheel is connected to a valve stem, the valve stem is connected to the valve stem, a first sealing ring is fixed to the valve body on one side of the valve plate, a second sealing ring is arranged telescopically in the valve body on the other side of the valve plate, an adjusting ring is arranged in the valve body on the side of the second sealing ring, a plurality of protrusions are arranged on the side adjacent to the adjusting ring, a wedge-shaped block corresponding to the protrusions is arranged on the adjusting ring, an adjusting screw extending out of the valve body is fixed on the valve body, the adjusting screw controls the rotation of the adjusting ring, thereby controlling the length of the second sealing ring extending out of the valve body; the utility model has an ingenious structure, and the sealing between the sealing ring and the valve plate is ensured by a controllable sealing ring arranged outside the valve body.

[0004] In the above structure, the sealing effect of the sealing ring on the fluid can be achieved. However, during the retreat process of the knife gate valve, the knife gate valve comes into contact with the fluid, which will cause the fluid to adhere to the knife gate valve. When the knife gate valve comes into contact with the sealing ring, the knife gate valve has a sharp blade surface. During retreat, the blade surface cannot completely contact with the sealing ring, which will make the fluid on the blade surface unobstructed, causing the fluid to follow the blade surface into the valve body. When the blade surface moves forward, the fluid will remain in the valve body under the action of the sealing ring, causing fluid to accumulate inside the valve body. When the fluid accumulates to a certain extent, blockage will occur, which is not conducive to the staff's control operation of the knife gate valve, reduces the service life of the knife gate valve, and increases the maintenance cost of the knife gate valve.

[0005] Therefore, how to provide a knife-shaped gate valve specifically for desulfurization and denitrification is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0006] One object of the present invention is to provide a knife-shaped gate valve for desulfurization and denitrification. The knife-shaped gate valve for desulfurization and denitrification described in the present invention comprises a valve body, a through hole for fluid passage is provided on the valve body, a control component for controlling the on-off of the through hole is arranged on the valve body, regulating components are arranged on both sides of the valve body, a pushing component is arranged on the regulating component, a sealing component is arranged on the output end of the pushing component, a pressure storage component connected to the control component is arranged on the valve body, a connecting component is arranged between the pressure storage component and the pushing component, an inflatable component is arranged on the valve body, and a sealing component connected to the pressure storage component is arranged inside the sealing component. The expansion component is connected to the inflation component, and a purge component connected to the inflation component is arranged inside the valve body, and the purge component is used to blow down the residual fluid inside the valve body; wherein, when the control component retracts, the pressure accumulation component and the connecting component are used to force the pushing component to move, thereby realizing the primary contact between the sealing component and the control component; the adjusting component drives the pushing component to move, thereby realizing the secondary contact between the sealing component and the control component; the inflation component inflates the expansion component, thereby realizing the tertiary contact between the sealing component and the control component.

[0007] Preferably, the control component includes a threaded sleeve arranged on the valve body, a threaded rod 1 is threadedly connected to the threaded sleeve, the threaded rod 1 threadedly passes through the threaded sleeve, and a knife-shaped valve plate adapted to the through port is connected to a bearing at one end of the threaded rod, and the knife-shaped valve plate passes through the valve body.

[0008] Preferably, the adjustment assembly includes a threaded rod 2 threadedly connected to the valve body, the threaded rod 2 threadedly passes through the valve body, the end bearing of the threaded rod 2 is connected to an adjustment plate, the adjustment plate is located inside the valve body and passes through the valve body, and a notch is opened on the adjustment plate.

[0009] Preferably, the pushing assembly includes a pushing cylinder arranged on the adjusting plate, a pushing piston is arranged inside the pushing cylinder, a pushing rod passing through the pushing cylinder is arranged on the pushing piston, and a pushing spring is arranged between the pushing cylinder and the sealing assembly and is sleeved on the outer ring of the pushing rod.

[0010] Preferably, the sealing assembly comprises a sliding plate arranged on the push rod, the sliding plate passes through the valve body, an elastic sealing strip passing through the valve body is arranged on the sliding plate, and an inclined surface is arranged at the end of the elastic sealing strip.

[0011] Preferably, the pressure storage assembly includes a pressure storage cylinder arranged on the valve body, a pressure storage piston is arranged in the pressure storage cylinder, a pressure storage rod passing through the pressure storage cylinder is arranged on the pressure storage piston, a connecting rod connected to the pressure storage rod is arranged on the knife-shaped valve plate, and the pressure storage rod and the connecting rod both pass through the valve body.

[0012] Preferably, the connecting component includes a connecting pipe arranged on the pressure-accumulating cylinder, a solenoid valve is installed on the connecting pipe, a cross pipe is arranged on the connecting pipe, and a hose connected to the pushing cylinder is arranged on the cross pipe.

[0013] Preferably, the inflation component includes an inflation pump installed on the valve body, an inflation pipe is provided at the output end of the inflation pump, a connecting block is provided on the inflation pipe, and the expansion component and the purge component are both connected to the connecting block.

[0014] Preferably, the expansion assembly comprises an expansion airbag installed inside the elastic sealing strip, the expansion airbag is provided with a conduit connected to the connecting block, and the conduit is installed with a second solenoid valve.

[0015] Preferably, the purge assembly includes a blowing block arranged on the top of the valve body, the blowing block is provided with a plurality of evenly distributed blowing nozzles, the blowing nozzles penetrate the valve body, the blowing block is provided with a connecting pipe connected to the connecting block, and the connecting pipe is installed with an electromagnetic valve three.

[0016] The beneficial effects of the present invention are as follows: the present invention installs the device on the pipeline, and in the process of desulfurization and denitrification, the control component is used to control the on and off of the fluid. When the control component retreats, that is, when the fluid is released, residual fluid will be attached to the end of the control component, and the control component retreats upward, so that the control component drives the pressure storage component to move. When the end of the control component just contacts the sealing component, the pressure storage component is connected to the pushing component through the action of the connecting component, forcing the gas in the pressure storage component to enter the pushing component, so that the gas pressure of the pushing component increases, forcing the pushing component to drive the sealing component to move until it contacts the end of the control component. When the control component retreats to its original position, the pushing component is forced to The air pressure gradually increases, so that the pushing component drives the sealing component to gradually move forward, so that the sealing component is always in contact with the end of the control component, forcing the sealing component to scrape off the residual fluid at the end of the control component, reducing the residual fluid from entering the valve body, forming a primary contact between the sealing component and the control component, thereby achieving a primary cleaning effect of the residual fluid; when the ends of the sealing component and the control component cannot always be in contact, the adjusting component is used for fine adjustment to force the pushing component to move forward, so that the pushing component drives the sealing component forward, forcing the sealing component to always be in contact with the ends of the control component, further forming a secondary contact between the sealing component and the control component, thereby achieving a secondary cleaning effect of the residual fluid; when the sealing component and the end of the control component cannot always be in contact, the adjusting component is used for fine adjustment to force the pushing component to move forward, so that the pushing component drives the sealing component to move forward, forcing the sealing component to always be in contact with the end of the control component, further forming a secondary contact between the sealing component and the control component, thereby achieving a secondary cleaning effect of the residual fluid; When the ends of the sealing component and the control component are still not in constant contact, the inflation component is used to inflate the expansion component, forcing the inside of the sealing component to expand, reducing the contraction of the sealing component, and forcing the ends of the sealing component and the control component to always be in contact, forming a three-level contact between the sealing component and the control component, thereby achieving a three-level cleaning effect of residual fluid and improving the fluid barrier function; when the control component moves downward, the control component drives the pressure storage component to move in the opposite direction, and the pressure storage component is connected to the pushing component through the action of the connecting component, forcing the gas of the pushing component to enter the pressure storage component, reducing the gas pressure of the pushing component, and forcing the pushing component to drive the sealing component to move, so that the sealing component and the control component are in a state of being ... The end of the control component is separated. When separation does not occur, the adjusting component is used to adjust the push component to retreat, forcing the sealing component to be completely separated from the end of the control component, so that the control component does not contact the sealing component during the downward movement, thereby improving the wear resistance of the control component; when a small amount of fluid exists in the valve body, during the downward movement of the control component, the purge component is connected to the inflation component, so that the inflation component supplies air to the purge component, and the gas is introduced into the valve body through the action of the purge component, so that the gas blows down the fluid in the valve body. Due to the retreat of the sealing component, the fluid is continuously blown down through the gap between the control component and the valve body until the small amount of fluid in the valve body is completely blown down, thereby achieving a cleaning effect on the inside of the valve body;In summary, the knife-shaped gate valve for desulfurization and denitrification of the present application can realize the three-level contact of the sealing component with the control component and clean the residual fluid during the retreat process of the control component, reduce the residual fluid attached to the control component during the retreat process, reduce the accumulation of fluid inside the valve body, and thus reduce the possibility of valve body blockage, which is beneficial to the control operation of the knife-shaped gate valve by the staff, improves the service life of the knife-shaped gate valve, and reduces the maintenance cost of the knife-shaped gate valve. During the downward movement of the control component, the sealing component and the control component can be separated, and the wear resistance of the control component can be improved. At the same time, the purge component can be used to achieve the cleaning effect of the inside of the valve body, further avoiding the accumulation of fluid inside the valve body. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] Figure 1 It is a three-dimensional structural entity diagram of the present invention.

[0019] Figure 2 It is a physical diagram of the internal structure of the present invention.

[0020] Figure 3 It is a structural entity diagram of the control component of the present invention.

[0021] Figure 4 It is a partial structural entity diagram of the present invention.

[0022] Figure 5 It is a structural entity diagram of the regulating component of the present invention.

[0023] Figure 6 It is a structural entity diagram of the sealing component of the present invention.

[0024] Figure 7 It is a structural entity diagram of the driving component of the present invention.

[0025] Figure 8 It is a structural entity diagram of the pressure storage component of the present invention.

[0026] Fig. 9 It is a connection diagram of the inflation component, expansion component and purge component of the present invention.

[0027] Fig.10 For the present invention Fig. 9 Side view of.

[0028] In the figure: 1, valve body; 2, port; 3, control assembly; 301, threaded sleeve; 302, threaded rod 1; 303, knife-shaped valve plate; 4, adjustment assembly; 401, threaded rod 2; 402, adjustment plate; 403, notch; 5, push assembly; 501, push cylinder; 502, push piston; 503, push rod; 504, push spring; 6, sealing assembly; 601, sliding plate; 602, elastic sealing strip; 603, inclined surface; 7, pressure storage assembly; 701, pressure storage cylinder; 702 , pressure storage piston; 703, pressure storage rod; 704, connecting rod; 8, connecting assembly; 801, connecting pipe; 802, solenoid valve one; 803, cross pipe; 804, hose; 9, inflation assembly; 901, inflation pump; 902, inflation pipe; 903, connecting block; 10, expansion assembly; 1001, inflation airbag; 1002, catheter; 1003, solenoid valve two; 11, purge assembly; 1101, blowing block; 1102, blowing nozzle; 1103, connecting pipe; 1104, solenoid valve three. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0030] Embodiment 1: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the knife-shaped gate valve for desulfurization and denitrification of the present invention comprises a valve body 1, a port 2 for fluid to pass through is provided on the valve body 1, a control component 3 for controlling the opening and closing of the port 2 is arranged on the valve body 1, adjustment components 4 are arranged on both sides of the valve body 1, a push component 5 is arranged on the adjustment component 4, a sealing component 6 is arranged on the output end of the push component 5, a pressure storage component 7 connected to the control component 3 is arranged on the valve body 1, a connecting component 8 is arranged between the pressure storage component 7 and the pushing component 5, an air filling component 9 is arranged on the valve body 1, and a sealing component 6 is arranged inside the sealing component 6 to connect with the air filling component 9 The valve body 1 is provided with an expansion component 10, and a purge component 11 connected with the inflation component 9 is provided inside the valve body 1, and the purge component 11 is used to blow down the residual fluid inside the valve body 1; wherein, when the control component 3 retreats, the pressure accumulation component 7 and the connecting component 8 force the pushing component 5 to move, so as to realize the primary contact between the sealing component 6 and the control component 3; the regulating component 4 drives the pushing component 5 to move, so as to realize the secondary contact between the sealing component 6 and the control component 3; the inflation component 9 inflates the expansion component 10, so as to realize the tertiary contact between the sealing component 6 and the control component 3.

[0031] Working principle: The device is installed on the pipeline. During the desulfurization and denitrification process, the control component 3 is used to control the on and off of the fluid. When the control component 3 retreats, that is, when the fluid is released, the end of the control component 3 will be attached with residual fluid, and the control component 3 retreats upward, so that the control component 3 drives the pressure storage component 7 to move. When the end of the control component 3 just contacts the sealing component 6, the pressure storage component 7 is connected to the pushing component 5 through the action of the connecting component 8, forcing the gas in the pressure storage component 7 to enter the pushing component 5, so that the air pressure of the pushing component 5 increases, forcing the pushing component 5 to drive the sealing component 6 to move to contact the end of the control component 3. When the control component 3 retreats to its original position, the air pressure of the pushing component 5 is forced to gradually increase, so that The pushing component 5 drives the sealing component 6 to gradually move forward, so that the sealing component 6 is always in contact with the end of the control component 3, forcing the sealing component 6 to scrape off the residual fluid at the end of the control component 3, reducing the residual fluid from entering the valve body 1, forming a primary contact between the sealing component 6 and the control component 3, thereby achieving a primary cleaning effect of the residual fluid; when the sealing component 6 and the end of the control component 3 cannot always be in contact, the adjusting component 4 is used for fine adjustment to force the pushing component 5 to move forward, so that the pushing component 5 drives the sealing component 6 to move forward, forcing the sealing component 6 to always be in contact with the end of the control component 3, further forming a secondary contact between the sealing component 6 and the control component 3, thereby achieving a secondary cleaning effect of the residual fluid; when the sealing component 6 and the control component 3 cannot always be in contact, the adjusting component 4 is used for fine adjustment to force the pushing component 5 to move forward, so that the pushing component 5 drives the sealing component 6 to move forward, forcing the sealing component 6 to always be in contact with the end of the control component 3, further forming a secondary contact between the sealing component 6 and the control component 3, thereby achieving a secondary cleaning effect of the residual fluid; When the ends of the control component 3 still cannot be always in contact, the inflation component 9 is used to inflate the expansion component 10, forcing the inside of the sealing component 6 to expand, reducing the contraction of the sealing component 6, forcing the sealing component 6 to always be in contact with the end of the control component 3, forming a three-level contact between the sealing component 6 and the control component 3, thereby achieving a three-level cleaning effect of residual fluid and improving the fluid barrier function; when the control component 3 moves downward, the control component 3 drives the pressure storage component 7 to move in the opposite direction, and through the action of the connecting component 8, the pressure storage component 7 is connected to the pushing component 5, forcing the gas of the pushing component 5 to enter the pressure storage component 7, so that the gas pressure of the pushing component 5 is reduced, forcing the pushing component 5 to drive the sealing component 6 to move, so that the sealing component 6 and the end of the control component 3 are in contact. Partial separation, when no separation occurs, the adjusting component 4 is used to adjust the pushing component 5 to retreat, forcing the sealing component 6 to be completely separated from the end of the control component 3, so that the control component 3 does not contact the sealing component 6 during the downward movement, thereby improving the wear resistance of the control component 3; when there is a small amount of fluid in the valve body 1, during the downward movement of the control component 3, the purge component 11 is connected to the inflation component 9, so that the inflation component 9 supplies air to the purge component 11, and the gas is introduced into the valve body 1 through the action of the purge component 11, so that the gas blows down the fluid in the valve body 1, and because the sealing component 6 retreats, the fluid is continuously blown down through the gap between the control component 3 and the valve body 1 until the small amount of fluid in the valve body 1 is completely blown down, thereby achieving a cleaning effect on the interior of the valve body 1;In summary, the knife-shaped gate valve for desulfurization and denitrification of the present application can realize the three-level contact of the sealing component 6 with the control component 3 and clean the residual fluid during the retreat process of the control component 3, reduce the residual fluid attached to the control component 3 during the retreat process, reduce the phenomenon of fluid accumulation inside the valve body 1, thereby reducing the possibility of clogging of the valve body 1, facilitating the control operation of the knife-shaped gate valve by the staff, improving the service life of the knife-shaped gate valve, and reducing the maintenance cost of the knife-shaped gate valve. During the downward movement of the control component 3, the sealing component 6 can be separated from the control component 3, improving the wear resistance of the control component 3, and at the same time, the purge component 11 can be used to achieve the cleaning effect of the inside of the valve body 1, further avoiding the accumulation of fluid inside the valve body 1. ;

[0032] Embodiment 2: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the special knife-shaped gate valve for desulfurization and denitrification of the present invention, the control component 3 includes a threaded sleeve 301 arranged on the valve body 1, the threaded sleeve 301 is threadedly connected with a threaded rod 302, the threaded rod 302 threadedly penetrates the threaded sleeve 301, the end bearing of the threaded rod 302 is connected with a knife-shaped valve plate 303 adapted to the through port 2, and the knife-shaped valve plate 303 penetrates the valve body 1.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the knife-shaped gate valve specially used for desulfurization and denitrification of the present invention, the regulating component 4 includes a threaded rod 401 threadedly connected to the valve body 1, the threaded rod 401 threadedly penetrates the valve body 1, the end bearing of the threaded rod 401 is connected with an regulating plate 402, the regulating plate 402 is located inside the valve body 1 and penetrates the valve body 1, and a notch 403 is opened on the regulating plate 402.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, the knife-shaped gate valve specially used for desulfurization and denitrification of the present invention, the pushing component 5 includes a pushing cylinder 501 arranged on the adjusting plate 402, a pushing piston 502 is arranged inside the pushing cylinder 501, a pushing rod 503 penetrating the pushing cylinder 501 is arranged on the pushing piston 502, and a pushing spring 504 mounted on the outer ring of the pushing rod 503 is arranged between the pushing cylinder 501 and the sealing component 6.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the special knife-shaped gate valve for desulfurization and denitrification of the present invention, the sealing assembly 6 includes a sliding plate 601 arranged on the push rod 503, the sliding plate 601 passes through the valve body 1, and an elastic sealing strip 602 passing through the valve body 1 is arranged on the sliding plate 601, and the end of the elastic sealing strip 602 is provided with an inclined surface 603.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the special knife-shaped gate valve for desulfurization and denitrification of the present invention, the pressure storage component 7 includes a pressure storage cylinder 701 arranged on the valve body 1, a pressure storage piston 702 is arranged in the pressure storage cylinder 701, a pressure storage rod 703 penetrating the pressure storage cylinder 701 is arranged on the pressure storage piston 702, a connecting rod 704 connected to the pressure storage rod 703 is arranged on the knife-shaped valve plate 303, and the pressure storage rod 703 and the connecting rod 704 both penetrate the valve body 1.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the knife-shaped gate valve specially used for desulfurization and denitrification of the present invention, the connecting component 8 includes a connecting pipe 801 arranged on the pressure storage cylinder 701, a solenoid valve 802 is installed on the connecting pipe 801, a cross pipe 803 is arranged on the connecting pipe 801, and a hose 804 connected to the pushing cylinder 501 is arranged on the cross pipe 803.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the special knife-shaped gate valve for desulfurization and denitrification of the present invention, the inflation component 9 includes an inflation pump 901 installed on the valve body 1, an inflation pipe 902 is provided at the output end of the inflation pump 901, a connecting block 903 is provided on the inflation pipe 902, and the expansion component 10 and the purge component 11 are both connected to the connecting block 903.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the special knife-shaped gate valve for desulfurization and denitrification of the present invention, the expansion component 10 includes an expansion airbag 1001 installed inside the elastic sealing strip 602, the expansion airbag 1001 is provided with a conduit 1002 connected to the connecting block 903, and the conduit 1002 is installed with an electromagnetic valve 2 1003.

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the special knife-shaped gate valve for desulfurization and denitrification of the present invention, the purge assembly 11 includes a blowing block 1101 arranged on the top of the valve body 1, and a plurality of evenly distributed blowing nozzles 1102 are installed on the blowing block 1101. The blowing nozzles 1102 penetrate the valve body 1, and a connecting pipe 1103 connected to the connecting block 903 is provided on the blowing block 1101, and a solenoid valve three 1104 is installed on the connecting pipe 1103.

[0041] Working principle: The device is installed on the pipeline. During the desulfurization and denitrification process, the threaded rod 302 is rotated, and the threaded rod 302 moves back upward under the action of the threaded sleeve 301, so that the threaded rod 302 drives the knife-shaped valve plate 303 to move upward, until the knife-shaped valve plate 303 completely releases the port 2, thereby achieving the opening effect of the port 2; the threaded rod 302 is rotated in the opposite direction, and the threaded rod 302 moves downward under the action of the threaded sleeve 301, so that the threaded rod 302 drives the knife-shaped valve plate 303 to move downward, until the knife-shaped valve plate 303 completely closes the port 2, thereby achieving the closing effect of the port 2, thereby achieving the control of the fluid on and off.

[0042] When the knife-shaped valve plate 303 moves back, that is, the fluid is released, and residual fluid will be attached to the knife surface of the knife-shaped valve plate 303. At this time, the knife-shaped valve plate 303 moves upward, closing the electromagnetic valve 802, and the knife-shaped valve plate 303 drives the connecting rod 704 to move upward, so that the connecting rod 704 drives the pressure storage rod 703 to move upward, so that the pressure storage rod 703 drives the pressure storage piston 702 to move upward, thereby increasing the pressure of the gas in the pressure storage cylinder 701 to form a pressure storage effect. When the knife surface of the knife-shaped valve plate 303 contacts the elastic sealing strip 602, the electromagnetic valve 802 is opened, and the gas in the pressure storage cylinder 701 enters the push cylinder 501 through the connecting pipe 801, the cross pipe 803 and the hose 804, so that the air pressure in the push cylinder 501 increases, forcing the push piston 502 to drive the push rod 503 to move, so that the push rod 503 03 drives the sliding plate 601 to move, and the sliding plate 601 drives the elastic sealing strip 602 to move forward until the end of the spring sealing strip is in close contact with the knife surface of the knife-shaped valve plate 303. When the knife-shaped gate valve retracts to its original position or to its maximum limit, the air pressure of the pushing cylinder 501 is forced to increase gradually, so that the pushing rod 503 drives the sliding plate 601 and the elastic sealing strip 602 to gradually move forward, and the knife surface of the knife-shaped valve plate 303 gradually decreases in thickness from top to bottom, and the elastic sealing strip 602 can just be in close contact with the knife surface, so that the end of the elastic sealing strip 602 scrapes off the residual fluid on the knife surface of the knife-shaped valve plate 303, reducing the residual fluid from entering the valve body 1, forming a primary contact between the elastic sealing strip 602 and the knife surface of the knife-shaped valve plate 303, thereby achieving a primary cleaning effect of the elastic sealing strip 602 on the residual fluid on the knife surface of the knife-shaped valve plate 303.

[0043] When the elastic sealing strip 602 cannot always contact with the blade surface of the knife-shaped valve plate 303, the threaded rod 401 is rotated, and the threaded rod 401 drives the adjustment plate 402 to move forward, forcing the adjustment plate 402 to drive the pushing cylinder 501, the pushing rod 503 and the pushing piston 502 to move forward, so that the pushing rod 503 drives the sliding plate 601 and the elastic sealing strip 602 to move forward, so that the elastic sealing strip 602 is always in contact with the blade surface of the knife-shaped valve plate 303, forming a secondary contact between the elastic sealing strip 602 and the blade surface of the knife-shaped valve plate 303, thereby achieving a secondary cleaning effect of the elastic sealing strip 602 on the residual fluid on the blade surface of the knife-shaped valve plate 303.

[0044] When the elastic sealing strip 602 is still not in constant contact with the blade of the knife-shaped valve plate 303, open the solenoid valve 1003, start the air pump 901, and under the action of the air tube 902 and the connecting block 903, the gas is introduced into the expansion airbag 1001 through the conduit 1002, forcing the expansion airbag 1001 to expand to a reasonable degree, thereby weakening the elasticity of the elastic sealing strip 602, reducing the contraction of the elastic sealing strip 602, and forcing the elastic sealing strip 602 to always be in contact with the blade of the knife-shaped valve plate 303, forming a three-level contact between the elastic sealing strip 602 and the blade of the knife-shaped valve plate 303, thereby achieving a three-level cleaning effect of the elastic sealing strip 602 on the residual fluid on the blade of the knife-shaped valve plate 303, and improving the fluid barrier function.

[0045] When the knife-shaped valve plate 303 moves downward, the electromagnetic valve 802 is opened, and the knife-shaped valve plate 303 drives the connecting rod 704 to move downward, so that the connecting rod 704 drives the pressure storage rod 703 to move downward, so that the pressure storage rod 703 drives the pressure storage piston 702 to move downward, so that the volume in the pressure storage cylinder 701 increases, and through the action of the connecting pipe 801, the cross pipe 803 and the hose 804, the gas in the push cylinder 501 enters the pressure storage cylinder 701, so that the air pressure in the push cylinder 501 is reduced, forcing the push piston 502 to drive the push rod 503 to move backward, so that the push rod 503 drives the sliding plate 601 to move backward. , the sliding plate 601 drives the elastic sealing strip 602 to move back until the spring sealing strip is separated from the knife-shaped valve plate 303. When separation does not occur, the threaded rod 401 is rotated in the opposite direction, and the threaded rod 401 drives the adjusting plate 402 to move back, forcing the adjusting plate 402 to drive the pushing cylinder 501, the pushing rod 503 and the pushing piston 502 to move back, so that the pushing rod 503 drives the sliding plate 601 and the elastic sealing strip 602 to move back, so that the elastic sealing strip 602 is separated from the knife-shaped valve plate 303, so that the knife-shaped valve plate 303 does not contact the elastic sealing strip 602 during the downward movement, thereby improving the wear resistance of the knife-shaped valve plate 303.

[0046] When there is a small amount of fluid in the valve body 1, during the downward movement of the knife-shaped valve plate 303, the solenoid valve three 1104 is opened to connect the connecting pipe 1103, the connecting block 903 and the blowing block 1101, and the air pump 901 is started. Under the action of the air filling pipe 902 and the connecting block 903, the gas is introduced into the connecting pipe 1103, and the gas is introduced into the blowing block 1101 through the connecting pipe 1103. The gas is blown downward by the blowing nozzle 1102, so that the gas blows down the fluid in the valve body 1. Since the elastic sealing strip 602 is separated from the knife-shaped valve plate 303, the fluid is continuously blown down through the gap between the knife-shaped valve plate 303 and the valve body 1 until the small amount of fluid in the valve body 1 completely falls to the through port 2, thereby achieving a cleaning effect on the interior of the valve body 1.

[0047] The setting of the control component 3 can realize the control of the on-off of the fluid, which is beneficial to control the flow rate of the fluid, improve the control effect of the device, and can realize the force on the pressure storage component 7, thereby realizing the control effect of the push component 5; the setting of the adjustment component 4 can realize the adjustment of the position of the push component 5 and the sealing component 6, realize the secondary cleaning effect of the elastic sealing strip 602 on the knife surface of the knife-shaped valve plate 303, and can force the elastic sealing strip 602 to separate from the knife-shaped valve plate 303, thereby improving the wear resistance of the knife-shaped valve plate 303; the setting of the push component 5 can control the sealing component 6 The sealing component 6 is protruded, so that the elastic sealing strip 602 can clean the residual fluid on the blade surface of the knife-shaped valve plate 303, and the sealing component 6 can be hidden, so that the elastic sealing strip 602 can be separated from the knife-shaped valve plate 303; the setting of the sealing component 6 can realize the cleaning effect of the elastic sealing strip 602 on the residual fluid on the blade surface of the knife-shaped valve plate 303 when the knife-shaped valve plate 303 retreats and moves upward, and can separate the elastic sealing strip 602 from the knife-shaped valve plate 303 during the downward movement of the knife-shaped valve plate 303, thereby improving the wear resistance of the knife-shaped valve plate 303; the pressure storage component 7 The setting of the connecting component 8 can achieve the control effect of the air pressure and the transmission effect of the movement of the device, so as to facilitate the control of the pushing component 5 and the cleaning of the residual fluid on the blade of the knife-shaped valve plate 303, thereby improving the rationality of the device; the setting of the connecting component 8 can achieve the gas delivery effect, and the movement of the pushing component 5 is controlled by controlling the pressure storage component 7, thereby improving the flexibility and stability of the device, and the setting of the hose 804 facilitates the movement of the cylinder 501; the setting of the inflatable component 9 can provide gas power, thereby realizing the control of the expansion component 10 and the purge component 11, and improving the multi-directional transmission of the gas power. The effect of movement is beneficial to clearing the fluid in the valve body 1 and avoiding fluid accumulation; the setting of the expansion component 10 can cooperate with the inflation component 9 to weaken the elasticity of the elastic sealing strip 602, thereby realizing the three-level cleaning effect of the elastic sealing strip 602 on the blade surface of the knife-shaped valve plate 303, improving the barrier function of the residual fluid on the blade surface, and reducing the fluid from entering the valve body 1; the setting of the purge component 11 uses gas to blow down the fluid in the valve body 1 to avoid fluid accumulation in the valve body 1, improve the automatic cleaning ability of the device, solve the problem of fluid accumulation from the source, and increase the service life of the knife-shaped gate valve.

[0048] On the one hand, during the upward retreat of the knife-shaped valve plate 303, the present scheme can realize the function of the elastic sealing strip 602 to achieve the three-level contact with the knife-shaped valve plate 303 and clean up the residual fluid, thereby reducing the residual fluid attached to the knife surface of the knife-shaped valve plate 303 during the retreat process, reducing the phenomenon of fluid accumulation inside the valve body 1, thereby reducing the possibility of blockage of the valve body 1, facilitating the control operation of the knife-shaped gate valve by the staff, increasing the service life of the knife-shaped gate valve, and reducing the maintenance cost of the knife-shaped gate valve; during the downward movement of the knife-shaped valve plate 303, the elastic sealing strip 602 can be separated from the knife-shaped valve plate 303, thereby improving the wear resistance of the knife-shaped valve plate 303; on the other hand, the inflatable component 9 cooperates with the purge component 11 to achieve the cleaning effect on the inside of the valve body 1, further avoiding the accumulation of fluid inside the valve body 1, and improving the self-cleaning ability of the knife-shaped gate valve.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Special knife-shaped gate valve for desulfurization and denitrification, characterized by: The invention comprises a valve body (1), wherein the valve body (1) is provided with a through hole (2) for fluid to pass through, the valve body (1) is provided with a control component (3) for controlling the opening and closing of the through hole (2), the valve body (1) is provided with an adjustment component (4) on both sides, the adjustment component (4) is provided with a driving component (5), the output end of the driving component (5) is provided with a sealing component (6), the valve body (1) is provided with a pressure storage component (7) connected to the control component (3), a connecting component (8) is provided between the pressure storage component (7) and the driving component (5), the valve body (1) is provided with an inflation component (9), an expansion component (10) connected to the inflation component (9) is provided inside the sealing component (6), and the inflation component (10) is provided inside the sealing component (6). A purge assembly (11) connected to the inflation assembly (9) is provided inside the valve body (1), and the purge assembly (11) is used to blow away residual fluid inside the valve body (1); wherein, when the control assembly (3) retreats, the pressure accumulation assembly (7) and the communication assembly (8) force the push assembly (5) to move, thereby realizing primary contact between the sealing assembly (6) and the control assembly (3); the regulating assembly (4) drives the push assembly (5) to move, thereby realizing secondary contact between the sealing assembly (6) and the control assembly (3); and the inflation assembly (9) inflates the expansion assembly (10), thereby realizing tertiary contact between the sealing assembly (6) and the control assembly (3).

2. The knife-shaped gate valve for desulfurization and denitrification according to claim 1 is characterized in that: The control assembly (3) comprises a threaded sleeve (301) arranged on the valve body (1), a threaded rod (302) being threadedly connected to the threaded sleeve (301), the threaded rod (302) threadedly passing through the threaded sleeve (301), a knife-shaped valve plate (303) matching the through port (2) being connected to an end bearing of the threaded rod (302), the knife-shaped valve plate (303) passing through the valve body (1).

3. The knife-shaped gate valve for desulfurization and denitrification according to claim 2 is characterized in that: The adjustment component (4) comprises a second threaded rod (401) threadedly connected to the valve body (1), the second threaded rod (401) threadedly passes through the valve body (1), an end bearing of the second threaded rod (401) is connected to an adjustment plate (402), the adjustment plate (402) is located inside the valve body (1) and passes through the valve body (1), and a notch (403) is provided on the adjustment plate (402).

4. The knife-shaped gate valve for desulfurization and denitrification according to claim 3 is characterized in that: The pushing component (5) comprises a pushing cylinder (501) arranged on the adjusting plate (402), a pushing piston (502) being arranged inside the pushing cylinder (501), a pushing rod (503) penetrating the pushing cylinder (501) being arranged on the pushing piston (502), and a pushing spring (504) being sleeved on the outer ring of the pushing rod (503) being arranged between the pushing cylinder (501) and the sealing component (6).

5. The knife-shaped gate valve for desulfurization and denitrification according to claim 4 is characterized in that: The sealing assembly (6) comprises a sliding plate (601) arranged on the push rod (503), the sliding plate (601) passing through the valve body (1), an elastic sealing strip (602) passing through the valve body (1) is arranged on the sliding plate (601), and an inclined surface (603) is arranged at the end of the elastic sealing strip (602).

6. The knife-shaped gate valve for desulfurization and denitrification according to claim 5 is characterized in that: The pressure storage assembly (7) comprises a pressure storage cylinder (701) arranged on the valve body (1), a pressure storage piston (702) being arranged in the pressure storage cylinder (701), a pressure storage rod (703) penetrating the pressure storage cylinder (701) being arranged on the pressure storage piston (702), a connecting rod (704) connected to the pressure storage rod (703) being arranged on the knife-shaped valve plate (303), and both the pressure storage rod (703) and the connecting rod (704) penetrating the valve body (1).

7. The knife-shaped gate valve for desulfurization and denitrification according to claim 6 is characterized in that: The connecting component (8) comprises a connecting pipe (801) arranged on the pressure-accumulating cylinder (701), a solenoid valve (802) being installed on the connecting pipe (801), a transverse pipe (803) being arranged on the connecting pipe (801), and a hose (804) being arranged on the transverse pipe (803) and being connected to the pushing cylinder (501).

8. The knife-shaped gate valve for desulfurization and denitrification according to claim 7 is characterized in that: The inflation component (9) comprises an inflation pump (901) mounted on the valve body (1); an inflation pipe (902) is provided at the output end of the inflation pump (901); a connecting block (903) is provided on the inflation pipe (902); and both the expansion component (10) and the purge component (11) are connected to the connecting block (903).

9. The knife-shaped gate valve for desulfurization and denitrification according to claim 8 is characterized in that: The expansion assembly (10) comprises an expansion airbag (1001) installed inside the elastic sealing strip (602), the expansion airbag (1001) is provided with a conduit (1002) connected to the connecting block (903), and the conduit (1002) is installed with a second solenoid valve (1003).

10. The knife-shaped gate valve for desulfurization and denitrification according to claim 9, characterized in that: The purge assembly (11) comprises a blowing block (1101) arranged on the top of the valve body (1); a plurality of evenly distributed blowing nozzles (1102) are installed on the blowing block (1101); the blowing nozzles (1102) penetrate the valve body (1); a connecting pipe (1103) connected to the connecting block (903) is arranged on the blowing block (1101); and a solenoid valve three (1104) is installed on the connecting pipe (1103).

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