Airtight material flow stop valve driven by oscillating cylinder

Abstract

The invention relates to the technical field of airtight material flow stop valves, in particular to an airtight material flow stop valve driven by a swing cylinder, which comprises a valve body and a valve seat fixedly mounted on the valve body through a bolt, and the other end of the valve seat is fixedly mounted on a storage bin through a bolt; a meshing chamber is fixedly installed on the valve body, and a swing cylinder body is fixedly connected to the meshing chamber. A first channel and a second channel are fixedly installed at the two ends of the swing cylinder body correspondingly. A sealing mechanism is arranged in the valve body, a valve plate is connected to the sealing mechanism, the sealing mechanism can drive the valve plate to rotate when acting, a notch is formed in the valve seat, and a rubber ring is fixedly installed in the notch. An inflation mechanism is arranged on the swing cylinder body, and the size of the rubber ring can be increased when the inflation mechanism acts; the swing cylinder body is further provided with a swing mechanism, and the swing mechanism can drive the sealing mechanism and the inflation mechanism to act alternately when acting.

Description

Technical Field

[0001] The invention relates to the technical field of airtight material flow cut-off valves, in particular to an airtight material flow cut-off valve driven by a swing cylinder. Background Art

[0002] The airtight material flow cut-off valve is installed on the upper or lower part of the storage silo of the ironmaking charging equipment to isolate the airflow and material flow above and below the silo, and cooperates with the uniform release system to complete the pressurization and depressurization of the silo, thereby realizing the loading and unloading operations of the storage silo. At present, the common airtight material flow cut-off valves include: sealing valve, material flow valve, material gate, and airtight cut-off valve.

[0003] The commonly used gas-tight material flow cut-off valve in the market is composed of a box, a transmission bracket, a hydraulic cylinder, a swing rod, a swing arm shaft, a bearing, a key, a valve plate, a connecting screw, a sealing ring, and a valve seat. The transmission bracket is fixed on the box; the swing arm shaft and the bearing are installed on the transmission bracket, and the bearing is installed between the swing arm shaft and the transmission bracket, and the swing arm shaft can rotate; the swing rod and the swing arm shaft are fixed by a key; the valve plate is fixed to the swing arm shaft by a connecting screw, and the rotation of the swing arm shaft can drive the valve plate to rotate; the sealing ring is installed on the valve plate; the valve seat is fixed on the box by bolts; one end of the hydraulic cylinder is connected to the transmission bracket, and the other end is connected to the swing rod; the hydraulic cylinder is extended and retracted, driving the swing rod and the swing arm shaft to rotate, driving the valve plate to rotate, so that the sealing ring is pressed against the valve seat, thereby isolating the upper and lower airflows of the gas-tight material flow cut-off valve, thereby realizing the pressurization and depressurization of the silo.

[0004] The common airtight material flow cut-off valve has a complex structure and a short service life. The valve plate must rotate through a connecting rod mechanism composed of a transmission bracket, a swing rod, and a swing arm shaft. Each hinge point requires bearings and lubrication. The structure is complex, the hinge points are prone to wear and have a short service life. It is inconvenient to replace the sealing ring. When replacing the sealing ring, the valve plate must be turned to the inspection door position, and the connector that fixes the sealing ring must be removed inside the box. The operating space is small and inconvenient. Summary of the invention

[0005] The object of the present invention is to provide an airtight material flow cut-off valve driven by a swing cylinder to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A gas-tight material flow cut-off valve driven by a swing cylinder, comprising a valve body, and a valve seat fixedly mounted on the valve body by bolts, the other end of the valve seat being fixedly mounted on a storage bin by bolts; an engagement chamber is fixedly mounted on the valve body, and a swing cylinder body is fixedly connected to the engagement chamber; a first channel and a second channel are fixedly mounted at both ends of the swing cylinder body;

[0008] A sealing mechanism is provided in the valve body, and a valve plate is connected to the sealing mechanism. When the sealing mechanism is actuated, the valve plate can be driven to rotate to open or close the valve body and the valve seat;

[0009] A notch is provided in the valve seat, and a rubber ring is fixedly installed in the notch;

[0010] The swing cylinder body is provided with an inflation mechanism connected to the rubber ring, and when the inflation mechanism is in operation, the volume of the rubber ring can be increased to enhance the air tightness of the sealing mechanism;

[0011] The swing cylinder body is also provided with a swing mechanism, which can drive the sealing mechanism and the inflation mechanism to move alternately when the swing mechanism is in motion.

[0012] As a further solution of the present invention: the sealing mechanism includes a rotating support fixedly installed in the valve body, a rotating shaft penetrating the valve body is rotatably installed on the rotating support, the rotating shaft is rotatably connected to the valve body, and one end of the rotating shaft away from the rotating support is located in the meshing chamber; the valve plate is fixedly installed on the rotating shaft; and a gear fixedly connected to the rotating shaft is arranged in the meshing chamber.

[0013] As a further solution of the present invention: the surfaces of the valve plate, the valve body and the valve seat that cooperate with each other are spherical surfaces, and the hardness of the valve plate is relatively large.

[0014] As a further solution of the present invention: the inflation mechanism includes a piston cylinder fixedly installed at one end of the second channel away from the swing cylinder body, an inflation piston is slidably installed in the piston cylinder, a connecting rod is fixedly installed on the inflation piston, and a third baffle slidably connected to the second channel is fixedly installed on the connecting rod; the inflation piston is connected to the rubber ring through a conduit.

[0015] As a further solution of the present invention: the swing mechanism includes a slider slidably installed in the swing cylinder body, the slider is provided with a rack groove meshing with the gear, the slider is slidably installed with a guide rod, the two ends of the guide rod are respectively fixedly installed with a first baffle and a second baffle, and the first baffle is slidably installed in the first channel, and the guide rod is also wrapped with a spring whose two ends respectively contact with the first baffle and the slider; the first channel is fixedly installed with a cylinder fixedly connected to the first baffle at one end away from the swing cylinder body.

[0016] As a further solution of the present invention, the connection surfaces between the valve body and the valve seat and between the valve seat and the storage bin are highly smooth.

[0017] As a further solution of the present invention: the material of the conduit is resistant to high temperatures and has strong pressure resistance and small deformation.

[0018] As a further solution of the present invention: a bolt hole for bolt connection is provided at one end of the valve body away from the valve seat.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the rotation of the valve plate is directly achieved by driving the rotating shaft to rotate through the meshing action of the rack groove and the gear, there is no hinge point of the connecting rod mechanism, the structure is simple, the equipment failure points are few, maintenance is easy, and the service life is long; and because the valve body and the valve seat, as well as the valve seat and the storage bin are connected by bolts, and the rubber ring is installed on the valve seat, the rubber ring is easy to replace, and when replacing the rubber ring, the valve seat is removed separately, and the valve seat is installed on the valve body after replacing the new rubber ring, the operating space is large, and the operation is simple and convenient; and the swing mechanism drives the closing mechanism and the inflation mechanism to act alternately, and after the valve plate is sealed, the airtight material flow cut-off valve can be sealed by the expansion of the rubber ring, so that the overall airtightness of the airtight material flow cut-off valve is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of an embodiment of an airtight material flow cut-off valve driven by a swing cylinder.

[0021] Figure 2 A schematic structural diagram of another perspective of an embodiment of an airtight material flow shut-off valve driven by a swing cylinder.

[0022] Figure 3 for Figure 2 Schematic diagram of the structure from a cross-sectional perspective.

[0023] Figure 4 for Figure 2 Schematic diagram of the structure from an exploded perspective.

[0024] Figure 5 A schematic diagram of the structure of a rotating shaft and a valve plate in an embodiment of an airtight material flow cut-off valve driven by a swing cylinder.

[0025] Figure 6 A schematic diagram of the structure of a rack groove and a gear in an embodiment of an airtight material flow cut-off valve driven by a swing cylinder.

[0026] Figure 7 A schematic diagram of the structure of a connecting rod and a slider in an embodiment of an airtight material flow cut-off valve driven by a swing cylinder.

[0027] Figure 8 A schematic structural diagram of an inflation mechanism in an embodiment of an airtight material flow cut-off valve driven by a swing cylinder.

[0028] Fig. 9A schematic diagram of the structure of a rubber ring and a valve seat in an embodiment of an airtight material flow cut-off valve driven by a swing cylinder.

[0029] In the figure: 1, valve body; 101, rotating support;

[0030] 2. Valve seat; 201. Notch;

[0031] 3. Storage silo;

[0032] 4. Rotating shaft; 401. Gear;

[0033] 5. Valve plate;

[0034] 6. Cylinder;

[0035] 7. Guide rod; 701. First baffle; 702. Second baffle; 703. Spring;

[0036] 8. Slider; 801. Rack groove;

[0037] 9. Swing cylinder; 901. First channel; 902. Second channel; 903. Engagement chamber;

[0038] 10. Piston cylinder;

[0039] 11. Inflatable piston; 1101. Connecting rod; 1102. Third baffle;

[0040] 12. Catheter;

[0041] 13. Rubber ring. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0044] See also Figures 1 to 9In an embodiment of the present invention, a gas-tight material flow cut-off valve driven by a swing cylinder comprises a valve body 1, and a valve seat 2 fixedly mounted on the valve body 1 by bolts, and the other end of the valve seat 2 is fixedly mounted on a storage bin 3 by bolts; a meshing chamber 903 is fixedly mounted on the valve body 1, and a swing cylinder body 9 is fixedly connected to the meshing chamber 903; a first channel 901 and a second channel 902 are fixedly mounted at both ends of the swing cylinder body 9;

[0045] A sealing mechanism is provided in the valve body 1, and a valve plate 5 is connected to the sealing mechanism. When the sealing mechanism is actuated, the valve plate 5 can be driven to rotate to open or close the valve body 1 and the valve seat 2;

[0046] The valve seat 2 is provided with a notch 201, and a rubber ring 13 is fixedly installed in the notch 201;

[0047] The swing cylinder 9 is provided with an inflation mechanism connected to the rubber ring 13. When the inflation mechanism is in operation, the volume of the rubber ring 13 can be increased to enhance the air tightness of the sealing mechanism.

[0048] The swing cylinder 9 is also provided with a swing mechanism, which can drive the sealing mechanism and the inflation mechanism to act alternately when the swing mechanism is in motion.

[0049] Taking the embodiment combining all the features recorded in the present application as an example, when in use, the valve seat 2 is fixedly installed on the storage bin 3 by bolts, and the valve body 1 is fixedly connected to the valve seat 2 by bolts, so that the airtight material flow cut-off valve can be quickly installed in place, with large operating space, simple and convenient operation, and also simple maintenance.

[0050] In the initial position, the valve plate 5 is perpendicular to the valve body 1. When it is necessary to disconnect the connection between the airtight material flow cut-off valve and the storage bin 3, the swing mechanism can be driven to drive the sealing mechanism and the inflation mechanism to move alternately. That is, when the swing mechanism moves, the sealing mechanism will be driven to move first, so that the valve plate 5 rotates to a position parallel to the valve body 1. At this time, the valve plate 5 will conflict with the connection between the valve body 1 and the valve seat 2, thereby closing the valve body 1 and the valve seat 2, so that the airtight material flow cut-off valve and the storage bin 3 are in a blocked state, isolating the upper and lower airflows of the airtight material flow cut-off valve, and realizing pressurization and depressurization of the bin; the sealing mechanism is driven to move by the swing mechanism for blocking, which has the characteristics of simple structure and no hinge points of the connecting rod mechanism, and the relatively simple structural design makes the equipment have the characteristics of few failure points, easy maintenance and long service life.

[0051] After the valve plate 5 seals the dense material flow cut-off valve and the storage bin 3, the swing mechanism stops driving the sealing mechanism and instead drives the inflation mechanism; in the initial state, the rubber ring 13 is in a contracted state and does not contact the valve plate 5, and when the inflation mechanism is in operation, a large amount of nitrogen is injected into the rubber ring 13 to expand the volume of the rubber ring 13. During the expansion process, the rubber ring 13 will contact the valve plate 5 to further enhance the airtightness of the sealing mechanism.

[0052] By driving the sealing mechanism and the inflation mechanism to act alternately through the action of the swing mechanism, it is possible to avoid obstruction in the sealing process of the valve plate 5, thereby improving the overall sealing performance of the airtight material flow cut-off valve.

[0053] As a further solution of the present invention, the sealing mechanism includes a rotating support 101 fixedly installed in the valve body 1, and a rotating shaft 4 that penetrates the valve body 1 is rotatably installed on the rotating support 101. The rotating shaft 4 is rotatably connected to the valve body 1, and one end of the rotating shaft 4 away from the rotating support 101 is located in the meshing chamber 903; the valve plate 5 is fixedly installed on the rotating shaft 4; and a gear 401 fixedly connected to the rotating shaft 4 is provided in the meshing chamber 903.

[0054] Taking the embodiment combining all the features recorded in the present application as an example, when in use, when the swing mechanism is in action, the gear 401 is driven to rotate to drive the rotating shaft 4 to rotate on the rotating support 101 and the valve body 1, thereby driving the valve plate 5 perpendicular to the valve body 1 to rotate to a position parallel to the valve body 1, and the valve plate 5 is used to interfere with the connection between the valve body 1 and the valve seat 2 to seal the upper and lower parts of the airtight flow cut-off valve to isolate the storage bin 3, thereby realizing pressurization and decompression of the bin, and the sealing mechanism is driven by the swing mechanism to perform sealing, which has the characteristics of simple structure and no hinge points of the connecting rod mechanism, and the relatively simple structural design makes the equipment have the characteristics of few failure points, easy maintenance and long service life.

[0055] As a further solution of the present invention, the surfaces of the valve plate 5 that cooperate with the valve body 1 and the valve seat 2 are spherical surfaces, and the hardness of the valve plate 5 is relatively large.

[0056] Taking the embodiment combining all the features recorded in the present application as an example, when in use, the spherical surface can make the valve plate 5 have better sealing performance. After the storage bin 3 is pressurized, the spherical surface will converge the pressure inside the storage bin 3 to the center of the sphere along the radial direction of the spherical surface, so that the force of the valve plate 5 in the vertical direction becomes smaller, and the difficulty of the valve plate 5 being pushed open is increased, thereby ensuring the airtightness of the airtight material flow cut-off valve.

[0057] As a further solution of the present invention, the inflation mechanism includes a piston cylinder 10 fixedly installed at one end of the second channel 902 away from the swing cylinder body 9, an inflation piston 11 is slidably installed in the piston cylinder 10, a connecting rod 1101 is fixedly installed on the inflation piston 11, and a third baffle 1102 slidably connected to the second channel 902 is fixedly installed on the connecting rod 1101; the inflation piston 11 and the rubber ring 13 are connected through a conduit 12.

[0058] Taking the embodiment combining all the features recorded in the present application as an example, when in use, after the valve plate 5 blocks the airtight material flow cut-off valve and the storage bin 3, the swing mechanism will stop driving the sealing mechanism to drive the inflation mechanism instead. At this time, the swing mechanism will push the third baffle 1102 to slide in the second channel 902 toward the piston direction, thereby driving the inflation piston 11 to slide through the connecting rod 1101. The piston cylinder 10 is filled with nitrogen. When the inflation piston 11 slides, the nitrogen will be transported to the rubber ring 13 through the conduit 12, so that the volume of the rubber ring 13 becomes larger and conflicts with the valve plate 5, thereby further increasing the airtightness of the airtight material flow cut-off valve; the rubber ring 13 does not contact the valve plate 5 during the sealing process of the valve plate 5, so the rubber ring 13 does not hinder the sealing action of the valve plate 5, and after the valve plate 5 is blocked, the rubber ring 13 filled with nitrogen continues to expand and conflicts with the valve plate 5, thereby eliminating the connection gap between the valve plate 5 and the valve body 1 and the valve seat 2.

[0059] As a further solution of the present invention, the swing mechanism includes a slider 8 slidably installed in the swing cylinder body 9, the slider 8 is provided with a rack groove 801 meshing with the gear 401, the slider 8 is slidably installed with a guide rod 7, the two ends of the guide rod 7 are respectively fixedly installed with a first baffle 701 and a second baffle 702, and the first baffle 701 is slidably installed in the first channel 901, and the guide rod 7 is also wrapped with a spring 703 whose two ends respectively contact the first baffle 701 and the slider 8; the first channel 901 is fixedly installed at one end away from the swing cylinder body 9 with a cylinder 6 fixedly connected to the first baffle 701.

[0060] Taking the embodiment combining all the features recorded in the present application as an example, when in use, when it is necessary to disconnect the airtight material flow cut-off valve from the storage bin 3, the first baffle 701 is driven by the cylinder 6 to slide in the first channel 901 toward the second channel 902, thereby driving the guide rod 7 to move synchronously. At this time, the spring 703 will be compressed, and its elastic force will increase with the increase of the compression amount. When the elastic force is greater than the resistance of the sliding slider 8, the slider 8 will move synchronously with the first baffle 701. At this time, the rack groove 801 will engage with the gear 401, thereby causing the valve plate 5 to rotate to seal the upper and lower parts of the airtight material flow cut-off valve.

[0061] When the valve plate 5 rotates from a state perpendicular to the valve body 1 to a state parallel to the valve body 1, the slider 8 will collide with the connection between the swing cylinder 9 and the second channel 902. At this time, the slider 8 will be unable to move, so that the rack groove 801 and the gear 401 stop meshing, and the position of the valve plate 5 will no longer change.

[0062] Due to the push of the cylinder 6, the first baffle 701 will continue to slide, the spring 703 will continue to be compressed, and the second baffle 702 will contact the slider 8 at the initial position. During the rotation of the valve plate 5, the second baffle 702 will separate from the slider 8; after the slider 8 stops moving, the cylinder 6 will drive the second baffle 702 to slide into the second channel 902 through the guide rod 7, and contact the third baffle 1102, and then drive the third baffle 1102 to slide synchronously, so that nitrogen enters the rubber ring 13 to expand the rubber ring 13, further increasing the airtightness of the airtight material flow cut-off valve, until the spring 703 is completely compressed;

[0063] When it is necessary to open the airtight material flow cut-off valve to connect with the storage bin 3, the first baffle 701 is driven by the cylinder 6 to slide away from the second channel 902, thereby driving the spring 703 to reset, and at the same time, the second baffle 702 is separated from the third baffle 1102. At this time, the contraction force of the rubber ring 13 itself will transport nitrogen to the piston cylinder 10 through the conduit 12, thereby pushing the inflation piston 11 to slide and driving the third baffle 1102 to reset. After the second baffle 702 contacts the slider 8, it will drive the slider 8 to move synchronously. At this time, the rack groove 801 will mesh with the gear 401, thereby driving the valve plate 5 to rotate from the parallel valve body 1 state to the perpendicular valve body 1 state until the slider 8 is reset; the swing mechanism drives the sealing mechanism and the inflation mechanism to act alternately, which can avoid the valve plate 5 from being blocked, thereby improving the overall sealing performance of the airtight material flow cut-off valve.

[0064] The rotation of the valve plate 5 is directly achieved by driving the rotating shaft 4 to rotate through the meshing action of the rack groove 801 and the gear 401. There is no hinge point of the connecting rod mechanism, the structure is simple, the equipment failure points are few, the maintenance is easy, and the service life is long. Moreover, since the valve body 1 and the valve seat 2 as well as the valve seat 2 and the storage bin 3 are connected by bolts, and the rubber ring 13 is installed on the valve seat 2, the rubber ring 13 is easy to replace. When replacing the rubber ring 13, the valve seat 2 is removed separately, and the valve seat 2 is installed on the valve body 1 after replacing the new rubber ring 13. The operation space is large and the operation is simple and convenient. Moreover, the swing mechanism drives the closing mechanism and the inflation mechanism to act alternately, and the airtight material flow cut-off valve can be sealed by the expansion of the rubber ring 13 after the valve plate 5 is sealed, so that the overall airtightness of the airtight material flow cut-off valve is strong.

[0065] As a further solution of the present invention, the connection surfaces between the valve body 1 and the valve seat 2 and between the valve seat 2 and the storage bin 3 are highly smooth.

[0066] Taking the embodiment combining all the features described in the present application as an example, when in use, the high smoothness of the connection surface can increase the air tightness between the valve body 1 and the valve seat 2 and between the valve seat 2 and the storage bin 3 to prevent the pressure in the storage bin 3 from leaking out.

[0067] As a further solution of the present invention, the material of the conduit 12 is resistant to high temperatures and has strong pressure resistance and small deformation.

[0068] Taking the embodiment combining all the features described in this application as an example, when in use, the small deformation ability of the conduit 12 can prevent the conduit 12 from expanding during nitrogen transmission and reducing the expansion rate of the rubber ring 13, and the high temperature resistance feature can increase the service life of the conduit 12.

[0069] As a further solution of the present invention, a bolt hole for bolt connection is provided at one end of the valve body 1 away from the valve seat 2 .

[0070] Taking the embodiment combining all the features described in the present application as an example, when in use, the bolt holes are used to fix the valve body 1 to other equipment by bolts, thereby increasing the convenience and practicality of the airtight material flow cut-off valve.

[0071] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gas-tight material flow cut-off valve driven by a swing cylinder, comprising a valve body (1), and a valve seat (2) fixedly mounted on the valve body (1) by bolts, the other end of the valve seat (2) being fixedly mounted on a material storage bin (3) by bolts; an engagement chamber (903) being fixedly mounted on the valve body (1), and a swing cylinder body (9) being fixedly connected to the engagement chamber (903); a first channel (901) and a second channel (902) being fixedly mounted at both ends of the swing cylinder body (9); It is characterized in that A sealing mechanism is provided in the valve body (1), and a valve plate (5) is connected to the sealing mechanism. When the sealing mechanism is in operation, it can drive the valve plate (5) to rotate, so as to open or close the valve body (1) and the valve seat (2); A notch (201) is provided in the valve seat (2), and a rubber ring (13) is fixedly installed in the notch (201); The swing cylinder (9) is provided with an inflation mechanism connected to the rubber ring (13); when the inflation mechanism is in operation, the volume of the rubber ring (13) can be increased to enhance the air tightness of the sealing mechanism; The swing cylinder (9) is also provided with a swing mechanism, which can drive the sealing mechanism and the inflation mechanism to act alternately when the swing mechanism is in motion.

2. The airtight material flow cut-off valve driven by a swing cylinder according to claim 1, characterized in that: The sealing mechanism comprises a rotating support (101) fixedly mounted in the valve body (1); a rotating shaft (4) penetrating the valve body (1) is rotatably mounted on the rotating support (101); the rotating shaft (4) is rotatably connected to the valve body (1), and one end of the rotating shaft (4) away from the rotating support (101) is located in the meshing chamber (903); the valve plate (5) is fixedly mounted on the rotating shaft (4); and a gear (401) fixedly connected to the rotating shaft (4) is provided in the meshing chamber (903).

3. The airtight material flow cut-off valve driven by a swing cylinder according to claim 2, characterized in that: The surfaces of the valve plate (5) that cooperate with the valve body (1) and the valve seat (2) are spherical surfaces, and the hardness of the valve plate (5) is relatively high.

4. The airtight material flow cut-off valve driven by a swing cylinder according to claim 3, characterized in that: The inflation mechanism comprises a piston cylinder (10) fixedly mounted at one end of the second channel (902) away from the swing cylinder body (9); an inflation piston (11) is slidably mounted in the piston cylinder (10); a connecting rod (1101) is fixedly mounted on the inflation piston (11); a third baffle (1102) slidably connected to the second channel (902) is fixedly mounted on the connecting rod (1101); the inflation piston (11) is connected to the rubber ring (13) via a conduit (12).

5. The airtight material flow cut-off valve driven by a swing cylinder according to claim 4, characterized in that: The swing mechanism comprises a slider (8) slidably mounted in the swing cylinder body (9), the slider (8) being provided with a rack groove (801) meshing with the gear (401), a guide rod (7) slidably mounted on the slider (8), a first baffle (701) and a second baffle (702) being fixedly mounted at both ends of the guide rod (7), and the first baffle (701) being slidably mounted in the first channel (901), and a spring (703) being wrapped around the guide rod (7), the two ends of which are respectively in contact with the first baffle (701) and the slider (8); and a cylinder (6) fixedly connected to the first baffle (701) is fixedly mounted at one end of the first channel (901) away from the swing cylinder body (9).

6. The airtight material flow cut-off valve driven by a swing cylinder according to claim 1, characterized in that: The connection surfaces between the valve body (1) and the valve seat (2) as well as between the valve seat (2) and the material storage bin (3) are highly smooth.

7. The airtight material flow cut-off valve driven by a swing cylinder according to claim 5, characterized in that: The material of the conduit (12) is resistant to high temperatures and has strong pressure resistance and small deformation.

8. The airtight material flow cut-off valve driven by a swing cylinder according to claim 1, characterized in that: A bolt hole for bolt connection is provided at one end of the valve body (1) away from the valve seat (2).

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