A gas sealing conveying screw

Abstract

The application provides a gas sealing conveying screw, relates to the technical field of conveying screws, and aims to solve the technical problem in the prior art that the prior art cannot simultaneously realize material conveying and effective isolation of atmospheres in front and back spaces, and can only set rotary valves or flapper valves as gas lockers in front and back of the screw conveyor to prevent mutual flow of atmospheres in front and back, which needs to occupy a relatively large space, increases equipment, increases control logic, and has an undesirable effect. The device comprises a conveying main shaft, an outer cylinder, a spiral blade and a compression sealing area. The conveying main shaft, the outer cylinder, the spiral blade and the compression sealing area are used for actively isolating atmospheres when conveying materials containing volatile harmful gases, blocking the random flow of atmospheres, reducing the space occupied by the material conveying equipment, not needing to increase auxiliary equipment and control logic, improving the atmosphere isolation effect, preventing the mixing of harmful gases and air, and reducing the safety hazards of material conveying.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying screws, in particular to an air-sealing conveying screw. Background Art

[0002] A screw conveyor is a machine that uses a motor to drive a rotating screw to move materials for conveying. It can convey materials horizontally, obliquely, or vertically, and boasts advantages such as a simple structure, small cross-sectional area, good sealing, easy operation, simple maintenance, and convenient closed transportation. Screw conveyors are categorized into two types: shafted and shaftless. They are also categorized into U-shaped and tubular screw conveyors. Shafted screw conveyors are suitable for non-sticky dry powders and small particles (such as cement, fly ash, lime, and grain), while shaftless screw conveyors are suitable for conveying sticky and easily entangled materials (such as sludge, biomass, and garbage). The operating principle of a screw conveyor is that rotating spiral blades push the material through the screw conveyor. The forces that prevent the material from rotating with the screw conveyor blades are the material's own weight and the frictional resistance of the screw conveyor casing. The spiral blades are welded to the screw conveyor's rotating shaft, and the blade surface shape varies depending on the material being conveyed, including solid surface, belt surface, and vane surface. The screw conveyor's screw shaft has a thrust bearing at the end of the material's movement direction to provide axial reaction force to the screw along with the material. For longer conveyors, an intermediate hanging bearing should be added. When conveying materials containing volatile and harmful gases, it is necessary to prevent the volatile gases from coming into contact with air. This usually requires isolating the atmosphere to prevent the free flow of the atmosphere.

[0003] In the process of realizing the present invention, the applicant found that the existing technology has at least the following technical problems: the existing technology cannot effectively isolate the atmosphere in the front and rear spaces while realizing material transportation. It can only set rotary valves or gate valves in front and behind the screw conveyor as air locks to prevent the front and rear atmospheres from flowing into each other. This method requires occupying a relatively large space, increasing equipment, and increasing control logic, and the effect is not ideal. Summary of the Invention

[0004] The present invention aims to provide a sealed gas conveying screw to address the existing technical problem of installing rotary valves or gate valves before and after the screw conveyor as air locks to prevent the flow of atmosphere between the front and rear. This method requires a relatively large space, increases equipment and control logic, and has unsatisfactory results. The various technical effects of the preferred technical solutions provided by the present invention are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The application provides a gas-sealed conveying screw, which comprises a conveying main shaft, an outer cylinder, a spiral blade and a compression sealing area.

[0007] The conveying main shaft and the spiral blade are integrated and arranged inside the outer cylinder, the spiral blade surrounds the conveying main shaft, the compression sealing area is located in the material advancing direction of the spiral blade, the compression sealing area comprises a movable blocking piece, a fixed blocking piece and an enlarged main shaft, the enlarged main shaft is fixedly arranged in the middle part of the conveying main shaft and coaxially arranged with the conveying main shaft, the fixed blocking piece penetrates through the outer cylinder and is fixedly arranged on the outer wall of the outer cylinder, the movable blocking piece is detachably arranged on the fixed blocking piece and can tightly adhere to the outer wall of the enlarged main shaft.

[0008] Preferably, the compression sealing area is more than one, and the number can be increased according to the requirement.

[0009] Preferably, the movable blocking piece has a counterweight part, the movable blocking piece is detachably connected with the fixed blocking piece through a nut, and the movable blocking piece can rotate on the fixed blocking piece under the action of the counterweight part.

[0010] Preferably, the movable blocking piece has a blocking part, and the blocking part has a circular arc structure and can tightly adhere to the enlarged main shaft.

[0011] Preferably, the diameter of the enlarged main shaft is greater than that of the conveying main shaft.

[0012] The gas-sealed conveying screw provided by the application can actively isolate the atmosphere when transporting materials containing volatile harmful gas, block the random flow of the atmosphere, reduce the space occupied by the material conveying equipment, does not need to increase auxiliary equipment and control logic, improves the atmosphere isolation effect, prevents the mixing of harmful gas and air, and reduces the safety hidden danger of material transportation. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 is a structural schematic view of an embodiment of the gas-sealed conveying screw.

[0015] Figure 2 is a side view of an embodiment of the gas-sealed conveying screw.

[0016] In the figure: 1. Conveying main shaft; 2. Outer cylinder; 3. Spiral blade; 4. Movable blocking plate; 5. Fixed blocking plate; 6. Expansion main shaft; 7. Counterweight; 8. Nut; 9. Compression sealing area. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0018] When describing the specific embodiments of the present invention, Figure 1 The perspective is defined as a schematic diagram of the structure of an air-sealing conveying screw in an embodiment of the present invention. In the description of the embodiment of the present invention, it should be understood that the terms "vertical", "lateral", "up", "down", "left", "right", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiment of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiment of the present invention. In the description of the embodiment of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiment of the present invention can be understood through specific circumstances. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar units or units with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention.

[0019] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or corresponding technical features. The accompanying drawings are only schematic diagrams and are not necessarily drawn to scale.

[0020] See also Figure 1 and Figure 2 The present invention provides a gas sealing conveying screw, comprising a conveying main shaft 1, an outer barrel 2, spiral blades 3 and a compression sealing area, wherein:

[0021] The conveying main shaft 1 and the spiral blade 3 are integrated and arranged inside the outer cylinder 2, and the spiral blade 3 is arranged around the conveying main shaft 1. The compression sealing area is located in the material forward direction of the spiral blade 3. The compression sealing area includes a movable blocking piece 4, a fixed blocking piece 5 and an expansion main shaft 6. The expansion main shaft 6 is fixed in the middle of the conveying main shaft 1, and the expansion main shaft 6 is coaxially arranged with the conveying main shaft 1. The fixed blocking piece 5 passes through the outer cylinder 2 and is fixed on the outer wall of the outer cylinder 2. The movable blocking piece 4 can be detachably installed on the fixed blocking piece 5, and the movable blocking piece 4 can fit tightly with the outer wall of the expansion main shaft 6.

[0022] Specifically, the conveying main shaft and the spiral blade are integrated and arranged inside the outer cylinder, and the spiral blade is welded around the conveying main shaft, the expansion main shaft is welded to the middle of the conveying main shaft, and the expansion main shaft and the conveying main shaft are coaxially arranged, the fixed blocking piece passes through the outer cylinder and is screwed to the outer wall of the outer cylinder, the movable blocking piece is detachably mounted on the fixed blocking piece by means of bolts and nuts, and the movable blocking piece can fit tightly with the outer wall of the expansion main shaft, first the fixed blocking piece is mounted on the fixed blocking piece by means of bolts and nuts, which can effectively block the gap between the fixed blocking piece and the expansion main shaft, and prevent the material from passing through the gap between the fixed blocking piece and the expansion main shaft, thereby enhancing the compression effect of the compression sealing area, thereby enhancing the isolation effect of the atmosphere, and then starting the conveying device, the rotation of the conveying main shaft drives the spiral blade to rotate, thereby To realize the conveying movement of materials, under normal conditions, when the material moves to the compression sealing area, the material accumulates in the compression sealing area due to the loss of the conveying thrust of the spiral blades, and the following materials continue to accumulate in the compression sealing area under the conveying thrust of the spiral blades. Due to the extrusion pressure, the front material is squeezed out of the compression sealing area and enters the next section of the spiral blade conveying area, and then enters the next compression sealing area. The material continues to enter different compression sealing areas over and over again. Since each compression sealing area is full of materials, it can actively isolate the atmosphere in each compression sealing area, block the random flow of the atmosphere, reduce the space occupied by the material conveying equipment, and do not need to add auxiliary equipment and control logic, thereby improving the atmosphere isolation effect, preventing harmful gases from mixing with air, and reducing the safety hazards of material transportation.

[0023] As an optional implementation, there is more than one compression sealing area, and the number of compression sealing areas can be increased according to the degree of isolation required.

[0024] As an optional embodiment, the movable blocking piece 4 has a counterweight portion 7 , and the movable blocking piece 4 is detachably connected to the fixed blocking piece 5 through a nut 8 , and the movable blocking piece 4 can rotate on the fixed blocking piece 5 under the action of the counterweight portion 7 .

[0025] Specifically, the movable blocking piece has a counterweight portion, and the movable blocking piece is detachably connected to the fixed blocking piece through a nut, and the movable blocking piece can rotate freely on the fixed blocking piece under the action of the gravity of the counterweight portion. The movable blocking piece is first installed on the fixed blocking piece at an angle, and then the movable blocking piece is limited by the nut to achieve detachable installation between the movable blocking piece and the fixed blocking piece. Under the action of the counterweight portion of the movable blocking piece, the movable blocking piece rotates on the fixed blocking piece, so that the movable blocking piece fits tightly with the outer wall of the expansion main shaft, which can effectively block the gap between the fixed blocking piece and the expansion main shaft, prevent material from passing through the gap between the fixed blocking piece and the expansion main shaft, enhance the compression effect of the compression sealing area, and thus enhance the isolation effect of the atmosphere.

[0026] As an optional embodiment, the movable blocking piece 4 has a blocking portion, and the blocking portion of the movable blocking piece 4 has an arc-shaped structure, and the blocking portion can fit tightly with the expanded main shaft 6.

[0027] Specifically, the movable blocking piece has a blocking portion, and the blocking portion of the movable blocking piece has an arc-shaped structure. The arc shape of the blocking portion of the movable blocking piece can fit tightly with the expansion main shaft, and can effectively block the gap between the fixed blocking piece and the expansion main shaft, preventing material from passing through the gap between the fixed blocking piece and the expansion main shaft, enhancing the compression effect of the compression sealing area, and thus enhancing the isolation effect of the atmosphere.

[0028] As an optional embodiment, the diameter of the expansion shaft 6 is larger than the diameter of the delivery shaft 1 .

[0029] Specifically, the diameter of the expansion main shaft is larger than the diameter of the conveying main shaft, in order to reduce the area through which the material passes, enhance the compression effect of the compression sealing area, and thus enhance the isolation effect of the atmosphere.

[0030] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A gas sealing conveying screw, characterized by: It comprises a conveying main shaft (1), an outer cylinder (2), spiral blades (3) and a compression sealing area, wherein: The conveying main shaft (1) and the spiral blade (3) are integrated and arranged inside the outer cylinder (2), and the spiral blade (3) is welded around the conveying main shaft (1). The compression sealing area is located in the material forward direction of the spiral blade (3). The compression sealing area includes a movable blocking piece (4), a fixed blocking piece (5) and an expansion main shaft (6). The expansion main shaft (6) is welded to the middle of the conveying main shaft (1), and the expansion main shaft (6) is coaxially arranged with the conveying main shaft (1). The fixed blocking piece (5) passes through the outer cylinder (2) and is fixed on the outer wall of the outer cylinder (2). The movable blocking piece (4) can be detachably installed on the fixed blocking piece (5), and the movable blocking piece (4) can be tightly fitted with the outer wall of the expansion main shaft (6). There is more than one compression sealing area; The movable blocking piece (4) has a counterweight portion (7), the movable blocking piece (4) is detachably connected to the fixed blocking piece (5) via a nut (8), and the movable blocking piece (4) can rotate on the fixed blocking piece (5) under the action of the counterweight portion (7); The movable blocking piece (4) has a blocking portion, and the blocking portion of the movable blocking piece (4) has an arc-shaped structure, and the blocking portion can be tightly fitted with the enlarged main shaft (6); The diameter of the expansion main shaft (6) is greater than the diameter of the delivery main shaft (1).

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