Locking device
By introducing a guide plate, air holes, and high-pressure jet nozzles into the impeller of the airlock, the problem of material blockage in traditional airlocks is solved, achieving efficient material conveying and stable equipment operation. It is suitable for continuous production in industries such as building materials, chemicals, and grain.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGJIAGANG XINGANG MASCH MFG CO LTD
- Filing Date
- 2025-09-11
- Publication Date
- 2026-07-14
AI Technical Summary
The impeller structure of traditional airlocks is prone to material blockage, especially in high-humidity or viscous materials, which are prone to clumping, leading to equipment downtime and low conveying efficiency, making it difficult to meet the needs of continuous production.
An impeller structure with a guide plate, air holes and a high-pressure jet nozzle was designed. The guide plate guides the material flow, the high-pressure jet clears the blockage, and a cleaning port is provided for emergency clearing. The structure is improved by combining reinforcing ribs and external bearings.
It significantly reduces material blockage rate, increases equipment uptime, meets continuous production needs, and improves equipment stability and ease of maintenance.
Smart Images
Figure CN224492886U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of airlock technology, specifically to an anti-clogging impeller structure for an airlock. Background Technology
[0002] Airlocks are key equipment in material conveying systems in industries such as building materials, chemicals, and grain processing. Their core function is to lock air and discharge materials through the rotation of impeller components. They intermittently transport granular and powdery materials from upstream pipelines to downstream pipelines, while blocking the airflow between upstream and downstream pipelines and maintaining stable negative pressure in the system. Traditional airlocks often use a simplified design of hub combined with straight blades, with the blades directly welded to the circumference of the hub.
[0003] The aforementioned traditional structure suffers from frequent material blockage during long-term operation. Material tends to accumulate at the junction of the blade root and the hub, especially high-humidity or viscous materials, which are prone to caking. This leads to a reduction in the discharge space between the blades, impeller jamming, equipment shutdown, low discharge efficiency, lack of flow guiding function of straight blades, easy formation of turbulent flow of materials, low conveying efficiency, and difficulty in adapting to the needs of continuous production.
[0004] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content
[0005] 1. The technical problem to be solved by the utility model:
[0006] This utility model provides an anti-clogging impeller structure for an airlock, which solves the technical problems existing in the background art.
[0007] 2. Technical Solution:
[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows: an anti-clogging impeller structure for an airlock includes a housing and an impeller assembly. The housing has an inlet at the top and an outlet at the bottom. The impeller assembly is placed inside the housing. The impeller assembly includes a hub and blades uniformly fixed along the circumference of the hub. A rotating shaft is provided inside the hub. A guide plate is integrally formed on one side of each blade. Multiple sets of air holes are opened on the outer circumferential surface of the hub between two adjacent blades. A high-pressure jet nozzle corresponding to the air holes is fixedly installed inside the hub. An air passage communicating with the air holes is opened inside the rotating shaft.
[0009] Furthermore, the angle between the guide vane and the blade is 15°-30°, and the width of the guide vane is smaller than the width of the blade.
[0010] Furthermore, a reinforcing rib is provided on the side of the blade away from the guide plate. The reinforcing rib extends along the length of the blade and is welded and fixed to the outer wall of the hub.
[0011] Furthermore, the multiple sets of air holes pass through the hub and the shaft respectively and are connected to the air passage.
[0012] Furthermore, both ends of the rotating shaft penetrate the housing and are equipped with deep groove ball bearings, all of which are located outside the housing.
[0013] Furthermore, one end of the air passage extends into the interior of the hub and connects to the high-pressure jet nozzle, while the other end extends to the end of the shaft and is provided with an air source interface.
[0014] Furthermore, a cleaning port is provided on the side wall of the housing, and a closable sealing cover is fitted onto the cleaning port.
[0015] 3. Beneficial effects:
[0016] Compared with the prior art, the technical solution provided by this utility model has the following advantages:
[0017] By guiding materials with a baffle plate, using high-pressure jets to clear blockages, and using an emergency clearing port to remove blockages, a triple anti-blocking mechanism is formed, which significantly reduces the blockage rate and greatly improves the equipment's trouble-free operating time, meeting the needs of continuous production.
[0018] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle;
[0021] Figure 3 This is a partial structural schematic diagram of the present invention;
[0022] Figure 4 This is a partial structural cross-sectional view of the present invention.
[0023] Figure label:
[0024] 1. Impeller assembly; 2. Shell; 3. Inlet; 4. Outlet; 5. Hub; 501. Air vent; 502. High-pressure jet nozzle; 6. Blade; 7. Shaft; 701. Air passage; 702. Air source interface; 8. Guide plate; 9. Reinforcing rib; 10. Deep groove ball bearing; 11. Sealing cover. Detailed Implementation
[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.
[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.
[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" 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 according to the specific circumstances.
[0029] See attached document Figure 1-4An anti-clogging impeller structure for an airlock includes a housing 2 and an impeller assembly 1. The housing 2 has an inlet 3 at the top and an outlet 4 at the bottom. The impeller assembly 1 is placed inside the housing 2. The impeller assembly 1 includes a hub 5 and blades 6 that are uniformly fixed along the circumference of the hub 5. A rotating shaft 7 is provided inside the hub 5. A guide plate 8 is integrally formed on one side of the blades 6. Multiple sets of air holes 501 are opened on the outer circumferential surface of the hub 5 between two adjacent blades 6. A high-pressure jet nozzle 502 corresponding to the air holes 501 is fixedly installed inside the hub 5. An air passage 701 connected to the air holes 501 is opened inside the rotating shaft 7.
[0030] A guide plate 8 is provided on one side of the blade 6 of the impeller assembly 1. The guide plate 8 guides the material to slide along the surface of the blade 6 at an angle of 15°-30°, avoiding direct accumulation at the root of the hub 5. The width of the guide plate 8 is set to 1 / 2 of the width of the blade 6, which ensures the guiding effect without increasing the impeller rotation resistance due to excessive width.
[0031] The outer circumferential surface of the hub 5 is located between two adjacent blades 6, and six sets of air holes 501 are opened along the axial direction. The interior of the contour 5 corresponds to the position of each set of air holes 501. A high-pressure jet nozzle 502 is fixedly installed by welding. The jet outlet of the high-pressure jet nozzle 502 is coaxially aligned with the air hole 501 to ensure that the gas is ejected without deviation, forming a jet direct injection channel, so that the high-pressure gas can be accurately applied to the blockage area.
[0032] The rotating shaft 7 has a built-in air passage 701, one end of which extends to the hub 5 and is connected to the high-pressure jet nozzle 502, and the other end extends to the end of the rotating shaft 7. It is connected to the air source interface 702 through an air pipe. The air source interface 702 is connected to a high-pressure air source and is equipped with a precision solenoid valve for remote control of jet cleaning. One end of the air pipe extends into the air passage 701 and connects to the high-pressure jet nozzle 502, and the other end connects to the air source interface 702 to achieve gas sealing.
[0033] The diameter of the air vent 501 is 5-8mm, the working pressure range of the high-pressure jet nozzle 502 is 0.4-0.6MPa, the air source interface 702 is a G1 / 4 quick connector, and the solenoid valve is a two-position two-way solenoid valve with a response time ≤0.1s.
[0034] A reinforcing rib 9 is welded to the angle between the blade 6 and the hub 5 for reinforcement. The reinforcing rib 9 has a triangular cross section and extends along the length of the blade 6. One right-angled side of the reinforcing rib 9 is welded and fixed to the outer wall of the hub 5, and the other right-angled side is welded and fixed to the back of the blade 6. This can improve the impact resistance of the blade 6, prevent the blade 6 from deforming due to material impact, and ensure the structural stability of the blade 6.
[0035] Both ends of the rotating shaft 7 are equipped with deep groove ball bearings 10. One end is connected to the drive motor through the deep groove ball bearing 10 to provide a power source, and the other end is connected to the air source interface 702 and fixed to the outside of the housing 2 through the bearing seat.
[0036] A cleaning port is also provided on the side wall of the housing 2. The edge of the cleaning port is provided with bolt holes. A closable sealing cover 11 is installed on the cleaning port. The sealing cover 11 is detachably connected to the housing 2 by bolts. A rubber sealing gasket is pasted on the side of the sealing cover 11 facing the inside of the housing 2. The outline of the sealing gasket fits perfectly with the outline of the cleaning port, which not only ensures airtightness, but also allows for quick removal of the bolts to open the cover and perform manual cleaning in case of severe blockage. This eliminates the need to disassemble the entire housing and greatly improves maintenance efficiency.
[0037] In summary, this technical solution guides material flow through a baffle plate to reduce root accumulation, while high-pressure jet nozzles and air holes actively clear blockages. A cleaning port and sealing cover ensure emergency clearing. Strengthening the blades with reinforcing ribs, preventing dust erosion with external bearings, and sealing the air passages and interfaces—these multiple design features not only significantly reduce the blockage failure rate but also improve equipment operational stability and ease of maintenance. It is suitable for airlock conveying scenarios involving granular and powdery materials and can meet the continuous production needs of industries such as building materials, chemicals, and food.
[0038] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A clogging-prevention impeller structure for an airlock, comprising a housing (2) and an impeller assembly (1), wherein the housing (2) has an inlet (3) at the top and an outlet (4) at the bottom, and the impeller assembly (1) is disposed inside the housing (2), characterized in that: The impeller assembly (1) includes a hub (5) and blades (6) uniformly fixed along the circumference of the hub (5). A rotating shaft (7) is provided inside the hub (5). A guide plate (8) is integrally formed on one side of the blade (6). Multiple sets of air holes (501) are opened on the outer circumferential surface of the hub (5) between two adjacent blades (6). A high-pressure jet nozzle (502) corresponding to the air hole (501) is fixedly installed inside the hub (5). An air passage (701) communicating with the air hole (501) is opened inside the rotating shaft (7).
2. The anti-clogging impeller structure for an airlock as described in claim 1, characterized in that: The angle between the guide plate (8) and the blade (6) is 15°-30°, and the width of the guide plate (8) is smaller than the width of the blade (6).
3. The anti-clogging impeller structure for an airlock as described in claim 1, characterized in that: The blade (6) is provided with a reinforcing rib (9) on the other side away from the guide plate (8). The reinforcing rib (9) extends along the length of the blade (6) and is welded and fixed to the outer wall of the hub (5).
4. The anti-clogging impeller structure for an airlock as described in claim 1, characterized in that: Multiple sets of air holes (501) pass through the hub (5) and the shaft (7) respectively and are connected to the air passage (701).
5. The anti-clogging impeller structure for an airlock according to claim 1, characterized in that: The rotating shaft (7) passes through the housing (2) at both ends and is provided with deep groove ball bearings (10), all of which are located outside the housing (2).
6. The anti-clogging impeller structure for an airlock according to claim 1, characterized in that: One end of the air passage (701) extends into the interior of the hub (5) and is connected to the high-pressure jet nozzle (502), while the other end extends to the end of the shaft (7) and is provided with an air source interface (702).
7. The anti-clogging impeller structure for an airlock according to claim 1, characterized in that: The shell (2) is also provided with a cleaning port on its side wall, and the cleaning port is equipped with an openable and closable sealing cover (11).