Anti-clamping concrete stirring rod and stirring device
By setting a main paddle and an auxiliary paddle on the stirring rod, and using a hinge mechanism and a deformation energy storage mechanism to adjust the stirring radius, the problem of coarse aggregate jamming in the continuous mixing device is solved, thereby improving the mixing efficiency and equipment life.
Patent Information
- Application Number
- CN202520340397.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Existing continuous mixing devices are easily affected by coarse aggregates in concrete during the mixing process, leading to problems such as jamming, damage, or even complete blockage of the mixing rod.
An anti-jamming concrete mixing rod is adopted, including a main mixing blade and a secondary mixing blade. The mixing radius is adjusted by a hinge mechanism and a deformation energy storage mechanism to increase or decrease the gap between the mixing rod and the inner wall of the mixing tank, thereby avoiding jamming and maintaining mixing efficiency.
It effectively solves the problem of coarse aggregate sticking during the mixing process, ensuring the continuity and uniformity of the mixing device and extending the service life of the equipment.
Smart Images
Figure CN223933880U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of construction machinery technology, and in particular to the field of concrete mixing machinery and devices, specifically to an anti-jamming concrete mixing rod and mixing device. Background Technology
[0002] Concrete preparation is an indispensable and crucial step in the construction and infrastructure industries. Currently, commercial concrete for infrastructure projects is typically produced at batching plants or mixed on-site using cement mixer trucks. Based on the continuity of the discharge from the mixing equipment, mixing plants can be categorized into batch mixing plants and continuous mixing plants. Batch mixing plants ensure that concrete mixing and preparation are completed in batches; that is, subsequent batches of concrete cannot be mixed until the current batch is finished and discharged, at which point a new batch of materials is added for mixing and preparation. Continuous mixing plants, on the other hand, do not differentiate between batches during concrete preparation; concrete materials are continuously added, and finished concrete is continuously discharged without interruption. Both types of mixing plants have their advantages and disadvantages, and different mixing plants are typically selected based on the actual construction site to achieve an uninterrupted supply of concrete.
[0003] Continuous mixing equipment, with its continuous discharge characteristic, is more suitable for large-scale infrastructure projects compared to batch mixing equipment's batch discharge. For example, the foundations of large buildings typically require a continuous supply of concrete, which must be formed in one go. Therefore, continuous mixing equipment is highly suitable for addressing the concrete supply issues of large-scale infrastructure projects. However, existing continuous mixing equipment has a structural drawback: during the mixing process, the mixing device is easily affected by the aggregate in the concrete, leading to jamming and damage. To solve this problem, this invention has been developed. Utility Model Content
[0004] To address the problem that continuous mixing devices are prone to jamming, damage, or even complete blockage of the mixing rod due to the influence of coarse aggregate in concrete during continuous mixing, this application provides an anti-jamming concrete mixing rod and mixing device, which specifically solves the problem of easy jamming in existing technologies using fixed structure mixing rods.
[0005] In order to further analyze and clarify the shortcomings of the existing technology, this application summarizes the reasons why the fixed structure stirring rod in the existing technology is prone to jamming as follows:
[0006] Concrete mixing involves continuously rotating a mixing rod or mechanism within the concrete material to ensure uniform mixing according to a predetermined ratio, thus forming concrete. However, gaps of varying sizes exist between the mixing rod and the inner wall of the device containing the concrete material (e.g., a mixing drum). The main cause of mixing rod jamming is that coarse aggregate (e.g., gravel), which is part of the concrete, gets stuck in this gap. Due to the irregular shape of coarse aggregate, the powerful driving force of the continuously rotating mixing rod can cause deformation of the mixing rod or the inner wall of the mixing drum, crushing of the coarse aggregate, or jamming of the mixing rod. Regardless of the cause, this negatively impacts concrete mixing. In existing technologies, to avoid damage or jamming of the mixing equipment due to coarse aggregate jamming, the gap between the mixing rod and the mixing drum is typically controlled to be very small, so small that coarse aggregate cannot get stuck in the mixing gap, or even if small pieces of aggregate get stuck, it will not damage the mixing rod. However, while reducing the mixing gap can effectively reduce or even eliminate aggregate jamming during the mixing process, this structure is typically suitable for batch mixing devices, where the concrete materials to be mixed are circulated and stirred in a fixed mixing drum until homogeneous. This structure is not suitable for continuous mixing because the structure of a continuous mixing device for containing and mixing materials differs from the structure of a batch mixing device's mixing drum, which is open at the top and closed at the bottom. A continuous mixing device's mixing drum is open at both ends. If the mixing rod is rotated close to the inner wall of the mixing drum, the material will flow in a spiral along the drum, resulting in insignificant mixing and making it difficult to achieve homogeneous mixing. However, increasing the gap between the mixing rod and the inner wall of the mixing drum can lead to coarse aggregate jamming. To solve the problem of coarse aggregate jamming during mixing while maximizing the mixing effect to meet the requirements of continuous mixing, this invention provides an anti-jamming concrete mixing rod and mixing device.
[0007] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0008] An anti-jamming concrete mixing rod includes a mixing shaft for connection to a drive device. A main mixing blade is fixedly connected to the mixing shaft, and a secondary mixing blade is also installed on the main mixing blade, which adjusts the mixing radius R of the mixing rod according to the mixing resistance. The mixing radius R refers to the maximum radius of rotation generated by the mixing rod during rotation, i.e., the maximum radius of the structure that can effectively agitate concrete materials. The secondary mixing blade is a structure that can adjust the size of the mixing radius R. When the secondary mixing blade encounters resistance, it deforms or deflects at an angle, thereby reducing the overall mixing radius R of the mixing rod, increasing the gap that allows coarse aggregate to pass through, and thus solving the problem of coarse aggregate jamming.
[0009] To better achieve the adjustment of the stirring radius R, preferably, the main stirring paddle includes an axial rod and a radial rod for fixing the axial rod and the stirring shaft, and the auxiliary stirring paddle is hinged to the axial rod on the side of the main stirring paddle away from the stirring shaft in the radial direction by at least one hinge mechanism.
[0010] Preferably, the hinge mechanism includes a first connecting plate fixedly connected to the stirring paddle, a first collar sleeved on the outermost axial rod and rotating around the axial rod, and a deformation energy storage mechanism mounted on the axial rod to keep the first connecting plate in its initial position.
[0011] Preferably, the hinge mechanism includes a hinge shaft, on which a first collar and a second collar are rotatably sleeved. The first collar is fixedly connected to the stirring paddle via a first connecting plate, and the second collar is fixedly connected to the outermost axial rod via a second connecting plate. A deformation energy storage mechanism for keeping the first connecting plate in its initial position is also installed on the hinge shaft.
[0012] Preferably, the deformation energy storage mechanism is any one of a torsion spring, a spring sheet, or a combination of a torsion spring and a spring sheet.
[0013] Preferably, the axial rods are arranged in a circular array around the stirring shaft, and at least one of the outermost axial rods is hinged to a stirring paddle.
[0014] The present invention also provides a mixing device, comprising a mixing tank having a cavity for accommodating the material to be mixed, the mixing tank having an open end or an open end structure, the aforementioned anti-jamming concrete mixing rod being installed inside the mixing tank, a gap being formed between the mixing rod and the inner wall of the mixing tank, and a mixing auxiliary paddle being provided on the mixing rod, the size of the gap being adjusted by the mixing auxiliary paddle according to the resistance encountered during the mixing process.
[0015] Beneficial effects:
[0016] This invention employs a structure combining a main impeller and an auxiliary impeller. Specifically, the stirring rod is divided into a fixed part near the stirring shaft, which serves as the main stirring impeller and undertakes the main stirring task. An auxiliary stirring impeller is also installed outside the main stirring impeller, whose relative angle with the main stirring impeller can be adaptively changed according to the resistance level. This is used to adjust the stirring radius of the entire stirring rod and avoid the problem of jamming during the stirring process. It can simultaneously take into account both stirring efficiency and the problem of jamming.
[0017] This invention allows for the selection of different mixing impeller structures based on the content and particle size of coarse aggregate in the mixed material. For concrete materials with larger or denser coarse aggregate particles, a mixing impeller with a wider adjustment range can be selected; conversely, for materials with smaller or less dense coarse aggregate particles, a mixing impeller with a narrower adjustment range can be selected, thus meeting various concrete mixing needs. This comprehensively solves problems such as jamming and unevenness in continuous concrete mixing. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a front view of an embodiment of the present invention that employs an asymmetrical structure.
[0020] Figure 2 yes Figure 2 Axonometric drawing of the structure.
[0021] Figure 3 yes Figure 1 Front view with symmetrical structure.
[0022] Figure 4 yes Figure 3 Axonometric drawing of the structure.
[0023] Figure 5 This is a front view of an asymmetric structure according to another embodiment of the present invention.
[0024] Figure 6 yes Figure 5 Enlarged view of the structure in area A.
[0025] Figure 7 yes Figure 5 Axonometric drawing of the structure.
[0026] Figure 8 yes Figure 7 Enlarged view of the structure in area B.
[0027] Figure 9 This is a cross-sectional view of the stirring blade of the stirring rod provided by the present invention in its initial state.
[0028] Figure 10 yes Figure 9 The diagram shows the cross-section of the mixing impeller in a state of resistance and avoidance of coarse aggregate.
[0029] In the figure: 1-stirring shaft; 2-main stirring impeller; 21-axial rod; 22-radial rod; 3-secondary stirring impeller; 4-hinged mechanism; 41-first connecting plate; 42-first collar; 43-hinged shaft; 44-second collar; 45-second connecting plate. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[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] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for 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. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0034] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.
[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0036] Example 1:
[0037] See the instruction manual appendix Figures 1-2 The illustrated anti-jamming concrete mixing rod includes a mixing shaft 1 for connection to a drive device. A main mixing blade 2 is fixedly connected to the mixing shaft 1. A secondary mixing blade 3 is also installed on the main mixing blade 2, allowing adjustment of the mixing radius R of the mixing rod according to the mixing resistance. The mixing radius R refers to the maximum radius of rotation generated by the mixing rod during rotation, i.e., the maximum radius of the structure capable of effectively agitating concrete materials. The secondary mixing blade 3 is a structure capable of adjusting the mixing radius R. When the secondary mixing blade 3 encounters resistance, it deforms or deflects at an angle, reducing the overall mixing radius R of the mixing rod, thereby increasing the gap for coarse aggregate to pass through and solving the problem of coarse aggregate jamming.
[0038] See the instruction manual appendix Figure 9 As shown, during the stirring process provided in this embodiment, the main stirring paddle 2 and the auxiliary stirring paddle 3 are superimposed in the radial or radii of the stirring rod. The stirring radius R of the rotating body formed by the rotation of the stirring rod is jointly determined by the main stirring paddle 2 and the auxiliary stirring paddle 3. Figure 9 As shown, when the resistance experienced by the mixing rod is insufficient to cause the mixing auxiliary impeller 3 to deflect or deform relative to the main mixing impeller 2, the current state is when the mixing radius R is at its maximum. During mixing, if the mixing auxiliary impeller 3 experiences resistance from the cement mortar or if coarse aggregate in the concrete becomes stuck between the mixing auxiliary impeller 3 and the mixing drum, causing the mixing auxiliary impeller 3 to deflect or deform relative to the main mixing impeller 2, see Appendix. Figure 10 As shown, the gap between the agitator 3 and the agitator tank will increase at this time to prevent jamming and allow for smooth continued agitation. It is worth noting that the agitator tank was mentioned above for ease of description. In this embodiment, the agitator tank should be interpreted broadly, meaning any container or structure that cooperates with the agitator rod described in this embodiment and is used to contain the materials to be agitated can be understood as the agitator tank described above. (The attached text is incomplete and requires further context.) Figure 1 and Figure 10Both examples illustrate a scheme in which the auxiliary impeller 3 is deflected relative to the main impeller 2 to adjust the stirring radius R. Alternatively, the auxiliary impeller 3 can be made into a deformable structure, such as rubber, silicone rubber, or other materials that possess both strength and deformation capability. The structure and material of the auxiliary impeller 3 should not be interpreted in a limited way.
[0039] See the instruction manual appendix Figure 3 and Figure 4 As shown, the stirring impeller 3 can be arranged in a symmetrical structure, such as axisymmetric or centrosymmetric, or as shown in the figure. Figure 1 The diagram shows an asymmetrical structure.
[0040] Example 2:
[0041] To better achieve adjustment of the stirring radius R, this embodiment provides a detailed description of the structure and connection relationship of the main stirring impeller 2 and the auxiliary stirring impeller 3, as detailed in the appendix to the instruction manual. Figure 3 and Figure 4 As shown, the main impeller 2 includes an axial rod 21 and a radial rod 22 for fixing the axial rod 21 and the stirring shaft 1. The auxiliary impeller 3 is hinged to the axial rod 21 on the radial side of the main impeller 2 away from the stirring shaft 1 via at least one hinge mechanism 4. This embodiment provides a technical solution for connecting the auxiliary impeller 3 and the main impeller 2 together via a hinge mechanism 4. In this structure, the range of adjustment of the stirring radius R depends on the axial distance L3 between the auxiliary impeller 3 and the axial rod 21. There are various ways to achieve this structure; for example, see Appendix. Figure 1 As shown, the central axis of the deflection of the mixing sub-paddle 3 is the axial rod 21. This structure is the simplest. When the mixing sub-paddle 3 encounters resistance, it deflects around the axial rod 21 that is hinged to it, so that coarse aggregate that may get stuck can pass through smoothly. Compared with the existing fixed mixing rod, which cannot deflect and change the mixing radius R, this fundamentally solves the problem of coarse aggregate or stones getting stuck on the mixing rod.
[0042] In this embodiment, to further improve the flexibility of the stirring paddle 3—that is, to reduce the stirring radius R of the stirring rod when the stirring paddle 3 may jam, but to deflect at a small angle as close to the initial state as possible when there is no jamming—the hinge mechanism 4 includes a first connecting plate 41 fixedly connected to the stirring paddle 3, a first collar 42 sleeved on the outermost axial rod 21 and rotating around the axial rod 21 connected to the first connecting plate 41, and a deformation energy storage mechanism (not shown in the figure) installed on the axial rod 21 to keep the first connecting plate 41 in the initial position. The deformation energy storage mechanism is any one of a torsion spring, a spring sheet, or a combination of a torsion spring and a spring sheet. It is worth noting that the first collar 42 can be an open collar or a closed collar structure to meet different installation methods.
[0043] Example 3:
[0044] This embodiment also provides another structural scheme for the hinge mechanism 4, see the appendix to the specification. Figures 6-8 As shown, the hinge mechanism 4 includes a hinge shaft 43, on which a first collar 42 and a second collar 44 are rotatably sleeved. The first collar 42 is fixedly connected to the stirring paddle 3 via a first connecting plate 41, and the second collar 44 is fixedly connected to the outermost axial rod 21 via a second connecting plate 45. A deformation energy storage mechanism for maintaining the first connecting plate 41 in its initial position is also installed on the hinge shaft 43. The deformation energy storage mechanism is any one of a torsion spring, a spring sheet, or a combination of a torsion spring and a spring sheet. The biggest difference between this embodiment and embodiment 2 is that the hinge shaft 43 of the hinge mechanism 4 is no longer represented by the axial rod 21, but is instead a hinge shaft 43 located between the axial rod 21 and the mixing paddle 3. With the axial distance L3 between the axial rod 21 and the mixing paddle 3 remaining constant, a larger axial distance L2 between the hinge shaft 43 and the axial rod 21 results in a smaller axial distance L1 between the hinge shaft 43 and the mixing paddle 3, leading to a smaller effective adjustment capability or adjustment range, suitable for mixing materials with smaller aggregate particle sizes in concrete. Conversely, with the axial distance L3 between the axial rod 21 and the mixing paddle 3 remaining constant, a smaller axial distance L2 between the hinge shaft 43 and the axial rod 21 results in a larger axial distance L1 between the hinge shaft 43 and the mixing paddle 3, leading to a larger effective adjustment capability or adjustment range, suitable for mixing materials with larger aggregate particle sizes or a higher proportion of coarse aggregate in concrete. The axial rods 21 are arranged in a circumferential array around the mixing shaft 1, with at least one of the outermost axial rods 21 hinged to a mixing paddle 3. The number of stirring paddles 3 can be 1, 2, 3, 4, 5, 6 or more; they can be evenly distributed in a circumferential array or non-uniformly distributed, see the instruction manual appendix. Figures 4-5As shown; a uniform distribution is preferred, as this will result in a higher degree of balance during the mixing process; however, given that the actual mixing speed is usually less than 200 rpm, the centrifugal vibration caused by a non-uniform distribution will not be very noticeable. At the same time, it can also disrupt the balance of the material during the mixing process to a certain extent, increasing the degree of turbulence, which has a positive effect on rapid and uniform mixing.
[0045] Example 4:
[0046] This invention also provides a mixing device comprising a mixing tank with a cavity for accommodating the material to be mixed. The mixing tank has an open end or an open end structure. An anti-jamming concrete mixing rod, as described in any of the above embodiments, is installed inside the mixing tank. A gap exists between the mixing rod and the inner wall of the mixing tank. The mixing rod has a secondary mixing paddle 3. The secondary mixing paddle 3 adjusts the size of the gap according to the resistance encountered during mixing. A cross-sectional schematic diagram during mixing is shown below. Figures 9-10 As shown.
[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An anti-jamming concrete mixing rod, comprising a mixing shaft (1) for connection to a drive device, wherein a mixing main blade (2) is fixedly connected to the mixing shaft (1), characterized in that: The main stirring paddle (2) is also equipped with a secondary stirring paddle (3) whose stirring radius R is adjusted according to the magnitude of stirring resistance.
2. The anti-jamming concrete mixing rod according to claim 1, characterized in that: The main stirring paddle (2) includes an axial rod (21) and a radial rod (22) for fixing the axial rod (21) and the stirring shaft (1). The auxiliary stirring paddle (3) is hinged to the axial rod (21) on the side of the main stirring paddle (2) away from the stirring shaft (1) in the radial direction by at least one hinge mechanism (4).
3. The anti-jamming concrete mixing rod according to claim 2, characterized in that: The hinge mechanism (4) includes a first connecting plate (41) fixedly connected to the stirring paddle (3), a first collar (42) sleeved on the outermost axial rod (21) and rotating around the axial rod (21) connected to the first connecting plate (41), and a deformation energy storage mechanism installed on the axial rod (21) to keep the first connecting plate (41) in its initial position.
4. The anti-jamming concrete mixing rod according to claim 2, characterized in that: The hinge mechanism (4) includes a hinge shaft (43), on which a first collar (42) and a second collar (44) are rotatably sleeved. The first collar (42) is fixedly connected to the stirring paddle (3) through a first connecting plate (41), and the second collar (44) is fixedly connected to the outermost axial rod (21) through a second connecting plate (45). A deformation energy storage mechanism for keeping the first connecting plate (41) in its initial position is also installed on the hinge shaft (43).
5. The anti-jamming concrete mixing rod according to claim 3 or 4, characterized in that: The deformation energy storage mechanism is any one of a torsion spring, a spring sheet, or a combination of a torsion spring and a spring sheet.
6. The anti-jamming concrete mixing rod according to claim 2, characterized in that: The axial rods (21) are arranged in a circular array with the stirring shaft (1) as the center, and at least one of the outermost axial rods (21) is hinged to a stirring paddle (3).
7. A stirring device, characterized in that: The mixing drum includes a cavity for accommodating the material to be mixed. The mixing drum has an open end or an open end structure. An anti-jamming concrete mixing rod as described in any one of claims 1-4 or 6 is installed inside the mixing drum. There is a gap between the mixing rod and the inner wall of the mixing drum. The mixing rod has a mixing sub-blade (3). The mixing sub-blade (3) adjusts the size of the gap according to the resistance encountered during the mixing process.