Airlock and its screw conveyor mechanism

Abstract

The utility model belongs to the air lock equipment technical field, concretely relates to a kind of air lock and its spiral conveying mechanism, and the air lock of the utility model includes: conveying pipe, upper portion is provided with feed inlet, axial one end is communicated with discharge tank;Spiral conveying mechanism, including the spiral shaft of being set in the conveying pipe and the spiral blade of being set on spiral shaft, the spiral blade is extended into the discharge tank from the conveying pipe;Driving motor, it is set in the other end of the conveying pipe axis direction, the output shaft of the driving motor is drivingly connected with the spiral shaft.

Description

Technical Field

[0001] This utility model belongs to the technical field of airlock equipment, and particularly relates to an airlock device and its spiral conveying mechanism. Background Technology

[0002] In pneumatic conveying systems for powder and granular materials, airlocks are a widely used and crucial piece of equipment. Their main function is to be installed at the discharge port of the silo, continuously discharging material while isolating airflow between the upper and lower spaces to ensure the stability and efficiency of the system.

[0003] Traditional airlock valves are essentially rotary valves whose core functions are uniform feeding and airlocking, and they typically lack horizontal conveying capabilities. When the process requires materials to be conveyed horizontally over a distance after airlocking and discharge, a separate conveying device must be connected in series after the airlock valve's outlet. This results in a system with numerous components, a complex layout, and a large footprint.

[0004] Therefore, how to solve the problem that traditional airlocks do not have horizontal conveying capabilities is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one airlock and its spiral conveying mechanism.

[0007] In a first aspect, embodiments of this disclosure provide a shut-off valve, comprising: The conveying pipe has a feed inlet at the top and one axial end connected to the discharge box. The screw conveyor mechanism includes a screw shaft disposed inside the conveying pipe and screw blades disposed on the screw shaft, wherein the screw blades extend from inside the conveying pipe into the discharge box; A drive motor is located at the other end of the conveying pipe along its axial direction, and the output shaft of the drive motor is connected to the helical shaft via a transmission connection.

[0008] In one optional embodiment, the discharge box has a movable end plate at its inlet, and the upper end of the end plate is hinged to the discharge box via a hinge shaft.

[0009] In one alternative embodiment, a counterweight rod is connected to the movable end plate, the counterweight rod is hinged to the top of the discharge box, and a counterweight block is provided on the counterweight rod.

[0010] In one optional embodiment, a pin seat is provided on the top of the discharge box, and the end of the counterweight rod is hinged to the pin seat by a pin.

[0011] In one alternative embodiment, the helical blade is a ribbon-shaped helical blade.

[0012] In one alternative embodiment, the gap between the helical blade and the inner wall of the conveying pipe is less than 2 mm.

[0013] In one alternative embodiment, the outlet of the discharge box is located at the bottom of the box body.

[0014] Secondly, this disclosure also provides a spiral conveying mechanism for a valve, comprising: a spiral shaft; A helical blade is disposed on the helical shaft, the length of which is configured such that its working section extends from below the inlet of a conveying pipe to the inside of the discharge box at the end of the conveying pipe, so as to push material from the inlet to the discharge box.

[0015] In one alternative embodiment, the helical blade is a ribbon-shaped helical blade.

[0016] In one alternative embodiment, the helical blade is configured such that, when it is disposed within a conveying pipe, the gap between it and the inner wall of the conveying pipe is less than 2 mm.

[0017] The beneficial effect of this invention is that the spiral blades of the airlock extend directly from the conveying pipe into the discharge box. Driven by the motor, the rotating spiral blades, while completing the airlock unloading, generate a continuous axial thrust on the material. This thrust directly drives the material to move horizontally along the axial direction of the conveying pipe and finally discharge it from the discharge box, thus solving the problem that traditional airlocks do not have horizontal conveying capabilities.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A structural diagram of a valve provided in an embodiment of this disclosure; Figure 2 This is a cross-sectional view of a valve provided in an embodiment of this disclosure.

[0022] In the picture: 100. Conveying pipe; 110. Feed inlet; 200. Discharge box; 210. End plate; 220. Hinge shaft; 230. Counterweight rod; 231. Counterweight block; 232. Pin; 240. Pin seat; 300. Screw conveying mechanism; 310. Screw shaft; 320. Screw blades; 400. Drive motor; 410. Output shaft. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0025] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0026] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0027] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0028] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0029] Research has revealed the following drawbacks of existing technologies: Traditional airlocks are essentially rotary valves, whose core functions are uniform feeding and airlocking, and they lack horizontal conveying capabilities. When the process requires materials to be conveyed horizontally over a distance after airlocking and discharge, a separate conveying device must be connected in series after the airlock outlet. This results in a system with numerous components, a complex layout, and a large footprint.

[0030] Based on the above research, this disclosure provides an airlock device that, through the cooperation of a spiral shaft and spiral blades, extends from below the feed inlet of the conveying pipe to the inside of the discharge box at the end of the conveying pipe, thereby horizontally pushing the material from the feed inlet to the discharge box and solving the above-mentioned problems.

[0031] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] See Figure 1 and Figure 2 This disclosure provides an airlock, including: a conveying pipe 100, which may be a tee pipe with openings at the top and both ends. The opening at the top of the conveying pipe 100 is a feed inlet 110 for receiving conveyed material. One axial end of the conveying pipe 100 is connected to a discharge box 200 (for ease of observation). Figure 1 The top plate of the discharge box 200 is hidden, and the other axial end is connected to the mounting base of the drive motor 400. A screw conveying mechanism 300 is provided inside the conveying pipe 100. This screw conveying mechanism 300 includes a screw shaft 310 disposed inside the conveying pipe 100 and screw blades 320 disposed on the screw shaft 310. The screw blades 320 extend along the length of the conveying pipe 100, and the extended ends of the screw blades 320 extend into the inlet of the discharge box 200. The drive motor 400 has its output shaft 410 connected to the screw shaft 310 inside the conveying pipe 100. Driven by the drive motor 400, the rotating screw blades 320, while completing airlock unloading, generate a continuous axial thrust on the material (e.g., ...). Figure 2 (As indicated by the middle arrow). This thrust directly drives the material to move horizontally along the axial direction of the conveying pipe 100 and finally discharge it from the discharge box 200, thus solving the problem that traditional airlocks do not have horizontal conveying capabilities.

[0035] See also Figure 1 and Figure 2In some embodiments, a movable end plate 210 is provided at the inlet 110 of the discharge box 200 (i.e., the interface communicating with the conveying pipe 100). The upper end of the end plate 210 is hinged to the box body of the discharge box 200 via a hinge shaft 220. Specifically, the two ends of the hinge shaft 220 are rotatably supported in bearings fixed to the side walls of the discharge box 200, so that the movable end plate 210 can swing at a certain angle around the hinge shaft 220 at the inlet 110 of the discharge box 200. When the spiral blade 320 rotates and pushes the material from the conveying pipe 100 into the discharge box 200, the accumulation of material will generate pressure on the inner side of the movable end plate 210. When this pressure overcomes the weight of the end plate 210 itself, the end plate 210 is pushed outward and swings outward around the hinge shaft 220, forming a channel for material discharge. After the material is discharged, the pressure on the end plate 210 decreases, and the end plate 210 automatically swings back under gravity, resetting and fitting against the edge of the inlet 110 of the discharge box 200. With the above settings, the end plate 210 can automatically close the channel when the equipment stops, which can effectively prevent external air backflow or internal dust leakage, and enhance the airlock effect of the equipment.

[0036] See also Figure 1 and Figure 2 In some embodiments, a counterweight rod 230 is fixedly connected to the outer surface of the movable end plate 210 (i.e., the side facing away from the material). The counterweight rod 230 is preferably welded or bolted to the lower middle part of the movable end plate 210. The upper end of the counterweight rod 230 is hinged to a pin seat 240 fixed to the top of the discharge box 200 via a pin. This makes the counterweight rod 230, end plate 210, and pin seat 240 together form a lever mechanism with the pin as the fulcrum. An adjustable counterweight block 231 is also provided on the counterweight rod 230. Specifically, the counterweight rod 230 may have threaded holes, multiple positioning holes arranged along its length, or a smooth rod structure, while the counterweight block 231 is correspondingly provided with threaded holes, a pin 232 mechanism, or fastening bolts, so that it can be stably fixed at different positions on the counterweight rod 230. When the screw conveyor 300 pushes the material, the pressure torque generated on the movable end plate 210 exceeds the resistance torque generated by the counterweight 231, causing the movable end plate 210 to be pushed open and material discharge to begin. Compared to a design relying solely on the weight of the end plate 210, this embodiment achieves flexible adjustment of the discharge back pressure through the counterweight 231. This can adapt to materials with different coefficients of friction and different flow rates. In addition, by adding the counterweight, the end plate 210 can adhere to the outlet with greater pressure when the machine stops, resulting in a better sealing effect.

[0037] See also Figure 1 and Figure 2In some embodiments, the ribbon-shaped helical blade 320 is formed by winding a rectangular or nearly rectangular steel strip along a helical trajectory and fixing it to the helical shaft 310. The radially inner edge of the ribbon-shaped helical blade 320 is welded and fixed to the helical shaft 310, while its radially outer edge is a free ribbon edge that is not connected to any structure. Specifically, there is a continuous, unobstructed space between adjacent helical blades 320. Material is less likely to form a stable "material bridge" or adhesive layer in the continuous space between the ribbon blades, thereby greatly reducing material adhesion. Even if a small amount of adhesion occurs, it is easy to detach itself during equipment operation due to the flexible vibration of the ribbon blades and the flow of the material itself, exhibiting good self-cleaning performance.

[0038] See Figure 2 In some embodiments, the fitting precision between the screw conveyor mechanism 300 and the conveying pipe 100 is optimized to achieve effective airlocking and ensure conveying efficiency. Specifically, the gap between the radial outer edge of the screw blade 320 and the inner wall of the conveying pipe 100 is controlled to be less than 2 mm. Preferably, this gap ranges from 0.5 mm to 1.5 mm. This tiny gap greatly limits the reverse leakage of airflow from the high-pressure area (discharge box 200 side) to the low-pressure area (inlet 110 side). Compared to the 5 mm or even larger gap reserved by traditional screw conveyors to prevent jamming, the gap design of this embodiment can form effective airflow resistance, allowing the material column in the conveying pipe 100 to better perform its material sealing function.

[0039] See Figure 1 and Figure 2 In some embodiments, the outlet of the discharge box 200 is located directly at the bottom of its body. Specifically, this bottom outlet is preferably a circular or square opening and is connected to downstream storage facilities via a flange or flexible connection interface. After the material is pushed horizontally into the discharge box 200 by the helical blades 320, it loses thrust in the vertical direction and settles downwards mainly by its own gravity. The design of the bottom outlet perfectly conforms to this movement trend of the material, providing the material with the most direct and least resistance discharge path. This effectively avoids unnecessary retention, tumbling, or accumulation of material in the box, ensuring the continuity and smoothness of discharge.

[0040] See Figure 1 and Figure 2 Some embodiments also provide a screw conveying mechanism 300 for a valve, including a screw shaft 310 and a screw blade 320 disposed on the screw shaft 310. The length of the screw blade 320 is configured such that its working section can extend from below the inlet 110 of a conveying pipe 100 to the inside of the discharge box 200 at the end of the conveying pipe 100 to push material from the inlet 110 to the discharge box 200.

[0041] See Figure 2 In some embodiments, the helical blade 320 is a ribbon helical blade 320.

[0042] See also Figure 2 In some embodiments, the helical blade 320 is configured such that when it is disposed within a delivery pipe 100, the gap between it and the inner wall of the delivery pipe 100 is less than 2 mm.

[0043] In summary, the spiral blades 320 of this airlock extend directly from the conveying pipe 100 into the discharge box 200. Driven by the drive motor 400, the rotating spiral blades 320 generate a continuous axial thrust on the material while completing the airlock unloading. This thrust directly drives the material to move horizontally along the axial direction of the conveying pipe 100 and finally discharge it from the discharge box 200, thus solving the problem that traditional airlocks lack horizontal conveying capabilities.

[0044] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0046] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0047] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0048] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A valve, characterized in that, include: A conveying pipe (100) is provided with a feed inlet (110) at its upper part, and one axial end of the conveying pipe (100) is connected to the discharge box (200); The screw conveyor mechanism (300) includes a screw shaft (310) disposed in the conveying pipe (100) and a screw blade (320) disposed on the screw shaft (310), wherein the screw blade (320) extends from the conveying pipe (100) into the discharge box (200). A drive motor (400) is located at the other end of the conveying pipe (100) along the axial direction, and the output shaft (410) of the drive motor (400) is connected to the spiral shaft (310) in a transmission connection.

2. The airlock as described in claim 1, characterized in that, The discharge box (200) has a movable end plate (210) at the inlet (110), and the upper end of the end plate (210) is hinged to the discharge box (200) through a hinge shaft (220).

3. The airlock as described in claim 2, characterized in that, A counterweight rod (230) is connected to the movable end plate (210), the counterweight rod (230) is hinged to the top of the discharge box (200), and a counterweight block (231) is provided on the counterweight rod (230).

4. The airlock as described in claim 3, characterized in that, The top of the discharge box (200) is provided with a pin seat (240), and the end of the counterweight rod (230) is hinged to the pin seat (240) by a pin.

5. The airlock as described in claim 1, characterized in that, The spiral blade (320) is a ribbon-shaped spiral blade (320).

6. The airlock as described in claim 1, characterized in that, The gap between the spiral blade (320) and the inner wall of the conveying pipe (100) is less than 2 mm.

7. The airlock as described in claim 1, characterized in that, The outlet of the discharge box (200) is located at the bottom of the box body.

8. A screw conveying mechanism for a valve, comprising: Helical shaft (310); A helical blade (320) is disposed on the helical shaft (310), the length of which is configured such that its working section can extend from below the inlet (110) of a conveying pipe (100) to the inside of the discharge box (200) at the end of the conveying pipe (100) to push material horizontally from the inlet (110) to the discharge box (200).

9. The screw conveyor mechanism as described in claim 8, characterized in that, The spiral blade (320) is a ribbon-shaped spiral blade.

10. The screw conveyor mechanism as described in claim 8, characterized in that, The spiral blade (320) is configured such that when it is disposed in a conveying pipe (100), the gap between it and the inner wall of the conveying pipe (100) is less than 2 mm.

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