Shaft end sealing structure of dry-mixed mortar mixer

Abstract

The utility model belongs to the field of sealing structures, and provides a dry-mixed mortar mixer shaft end sealing structure which comprises a connecting flange and a lubricating check ring, a shaft sleeve is assembled on the peripheral side of a shaft body, the connecting flange is installed on a mixer wall and located on the peripheral side of the shaft sleeve, the lubricating check ring is installed on the inner wall of the connecting flange, and a pressing plate is arranged on the outer layer of the lubricating check ring. A sealing ring is arranged between the lubricating check ring and the connecting flange, a cavity is formed in the inner wall of the lubricating check ring, and an oil cup is installed on the surface of the pressing plate and connected with the cavity. The first sealing ring and the second sealing ring are arranged to form a double-layer sealing structure, the middle sealing inner cavity is separated by the double-layer sealing structure, the sealing inner cavity is filled with grease, powder of a stirring machine can be in contact with the grease in a movement gap during operation, and the grease forms a layer of isolating membrane in the movement process, so that the sealing effect of the stirring machine is improved. The problems of material leakage, ash spraying and sealing failure at the shaft end position of the stirring device and the stirring machine body of the dry-mixed mortar stirring machine are effectively solved.

Description

Technical Field

[0001] The utility model belongs to the field of sealing structures, in particular to a shaft end sealing structure of a dry-mix mortar mixer. Background Art

[0002] At present, the main products of dry-mix mortar mixers are special mortars, most of which contain powders such as lime, cement, and heavy calcium powder. When this type of powder is mixed, it will move to the gaps due to the positive pressure in the mixer cavity.

[0003] The existing similar competing products use independent sealing devices such as mechanical seals and oil pressure seals. This type of sealing device is costly, difficult to maintain and lacks a core sealing structure. If the above sealing methods are used, the mixer needs to be equipped with an oil station or other liquid circulation system to ensure the normal use of the seal, which makes the overall configuration of the mixer redundant and the structure complex, resulting in sealing failures such as leakage, and will also incur additional after-sales costs and other problems.

[0004] To this end, those skilled in the art have proposed a shaft end sealing structure for a dry-mix mortar mixer to solve the problems raised in the background art. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a shaft end sealing structure for a dry mortar mixer to solve the problem that the liquid circulation system configured in the mixer in the prior art is too complicated, making the overall configuration of the mixer redundant, the structure complex, and the sealing failure such as leakage.

[0006] The shaft end sealing structure of the dry-mix mortar mixer comprises a connecting flange and a lubricating retaining ring, a shaft sleeve is mounted on the circumference of the shaft body, the connecting flange is mounted on the wall of the mixer and is located on the circumference of the shaft sleeve, the lubricating retaining ring is mounted on the inner wall of the connecting flange, a pressure plate is arranged on the outer layer of the lubricating retaining ring, a sealing ring is arranged between the lubricating retaining ring and the connecting flange, a cavity is opened on the inner wall of the lubricating retaining ring, an oil cup is mounted on the surface of the pressure plate, and the oil cup is connected to the cavity;

[0007] The sealing ring comprises a first sealing ring assembled between the lubricating retaining ring and the connecting flange, and a second sealing ring assembled between the lubricating retaining ring and the pressing plate.

[0008] Preferably, the cavity is connected to the circumferential side of the sleeve.

[0009] Preferably, an O-ring is provided between the connecting flange and the mixer wall.

[0010] Preferably, a sealing strip is provided between the lubrication retaining ring and the second sealing ring.

[0011] Preferably, studs are installed between the first sealing ring, the lubrication retaining ring, the second sealing ring and the pressure plate.

[0012] Preferably, the first sealing ring and the second sealing ring are both made of nitrile rubber.

[0013] Preferably, the first sealing ring and the second sealing ring are both made of styrene-butadiene rubber.

[0014] Preferably, the first sealing ring and the second sealing ring are both made of silicone rubber.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model forms a double-layer sealing structure by arranging a first sealing ring and a second sealing ring. The double-layer sealing structure separates a sealed inner cavity in the middle, and grease is added through an oil cup. The cavity is connected to ensure that the sealed inner cavity is filled with grease. During operation, powder of the mixer will contact the grease in the motion gap, and the grease forms an isolation film during the movement to prevent the powder in the mixer from leaking through the rotary motion gap. The utility model effectively solves the problems of leakage, dust spraying and sealing failure at the shaft end position of the stirring device and the mixer body of the dry mortar mixer, reduces maintenance costs, and ensures the cleanliness and efficiency of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 This is a front view structural schematic diagram of the utility model;

[0019] Figure 3 for Figure 2 Schematic diagram of the AA section structure.

[0020] In the figure:

[0021] 1. Connecting flange; 2. Mixer wall; 3. O-ring; 4. Sealing ring; 401. First sealing ring; 402. Second sealing ring; 5. Lubricating retaining ring; 6. Cavity; 7. Oil cup; 8. Sealing strip; 9. Pressure plate; 10. Bushing; 11. Shaft; 12. Stud. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0023] Example: As attached Figure 1 To Attachment Figure 3As shown: the utility model provides a shaft end sealing structure of a dry-mix mortar mixer, including a connecting flange 1 and a lubricating retaining ring 5, a shaft sleeve 10 is assembled on the peripheral side of a shaft body 11, the connecting flange 1 is mounted on the wall 2 of the mixer and is located on the peripheral side of the shaft sleeve 10, the lubricating retaining ring 5 is mounted on the inner wall of the connecting flange 1, a pressing plate 9 is arranged on the outer layer of the lubricating retaining ring 5, a sealing ring 4 is arranged between the lubricating retaining ring 5 and the connecting flange 1, a cavity 6 is opened on the inner wall of the lubricating retaining ring 5, an oil cup 7 is mounted on the surface of the pressing plate 9, the oil cup 7 is connected to the cavity 6, and the cavity 6 is connected to the peripheral side of the shaft sleeve 10, and the automatic lubrication function is realized through the connection between the oil cup 7 and the cavity 6, and the maintenance process is simplified. Only grease needs to be added regularly to ensure that the sealing ring 4 is continuously lubricated, reduce wear, and extend service life. The isolation film formed by the grease between the moving parts effectively prevents the infiltration of powder materials, while reducing friction and improving the operation efficiency of the mixer;

[0024] The sealing ring 4 includes a first sealing ring 401 assembled between the lubricating retaining ring 5 and the connecting flange 1, and a second sealing ring 402 assembled between the lubricating retaining ring 5 and the pressure plate 9; the first sealing ring 401 and the second sealing ring 402 are both made of nitrile rubber or styrene-butadiene rubber, silicone rubber; the above materials have good oil resistance, wear resistance and elasticity, and are suitable for the working environment of the dry-mix mortar mixer that requires wear resistance and chemical corrosion resistance. The overall mold molding production method ensures the dimensional accuracy and quality consistency of the sealing ring, and reduces potential problems in the assembly process.

[0025] An O-ring 3 is provided between the connecting flange 1 and the mixer wall 2 .

[0026] A sealing strip 8 is provided between the lubricating retaining ring 5 and the second sealing ring 402 .

[0027] Studs 12 are installed between the first sealing ring 401, the lubricating retaining ring 5, the second sealing ring 402 and the pressure plate 9; the first sealing ring 401 is assembled first, then the lubricating retaining ring 5, then the second sealing ring 402, and then the pressure plate 9, and these components are connected by studs 12.

[0028] As can be seen from the above, this structure forms a double-layer sealing structure through the first sealing ring 401 and the second sealing ring 402. The double-layer sealing structure separates the sealed inner cavity in the middle, and grease is added through the oil cup 7. The cavity 6 is connected to ensure that the sealed inner cavity is filled with grease and that there is no excess oil. During operation, the powder in the mixer will come into contact with the grease in the moving gap, and the grease will form a layer of isolation film during the movement to prevent the powder in the mixer from leaking through the rotating motion gap.

[0029] The grease in the sealed inner cavity ensures that the powder will not leak out of the mixer through the gap when the stirring device rotates, effectively solving the problems of leakage, dust spraying and sealing failure at the shaft end of the stirring device and the mixer body of the dry mortar mixer, reducing maintenance costs and ensuring the cleanliness and efficiency of the production process.

[0030] The first sealing ring 401 and the second sealing ring 402 in the sealing structure are manufactured by integral mold forming to ensure that each sealing ring is in good condition before assembly; secondly, special tools and fixtures are used for assembly to avoid the sealing ring from rupturing due to improper manual operation during the assembly process, thereby avoiding sealing failure.

[0031] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

[0032] In the description of the present utility model, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0036] In the drawings of the embodiments disclosed by the present invention, only the structures involved in the embodiments disclosed by the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dry mortar mixer shaft end sealing structure, comprising a connecting flange (1) and a lubricating retaining ring (5), wherein a shaft sleeve (10) is mounted on the circumference of a shaft body (11), wherein the connecting flange (1) is mounted on a mixer wall (2) and is located on the circumference of the shaft sleeve (10), and ... The lubricating retaining ring (5) is installed on the inner wall of the connecting flange (1), a pressure plate (9) is provided on the outer layer of the lubricating retaining ring (5), a sealing ring (4) is provided between the lubricating retaining ring (5) and the connecting flange (1), a cavity (6) is opened on the inner wall of the lubricating retaining ring (5), an oil cup (7) is installed on the surface of the pressure plate (9), and the oil cup (7) is connected to the cavity (6); The sealing ring (4) comprises a first sealing ring (401) assembled between the lubricating retaining ring (5) and the connecting flange (1), and a second sealing ring (402) assembled between the lubricating retaining ring (5) and the pressure plate (9).

2. The shaft end sealing structure of the dry-mix mortar mixer according to claim 1, characterized in that: The cavity (6) is connected to the circumferential side of the sleeve (10).

3. The shaft end sealing structure of the dry-mix mortar mixer according to claim 2, characterized in that: An O-ring (3) is provided between the connecting flange (1) and the mixer wall (2).

4. The shaft end sealing structure of the dry-mix mortar mixer according to claim 3, characterized in that: A sealing strip (8) is provided between the lubricating retaining ring (5) and the second sealing ring (402).

5. The shaft end sealing structure of the dry-mix mortar mixer according to claim 1 or 4, characterized in that: A stud bolt (12) is installed between the first sealing ring (401), the lubricating retaining ring (5), the second sealing ring (402) and the pressure plate (9).

6. The shaft end sealing structure of the dry-mix mortar mixer according to claim 5, characterized in that: The first sealing ring (401) and the second sealing ring (402) are both made of nitrile rubber.

7. The shaft end sealing structure of the dry-mix mortar mixer according to claim 5, characterized in that: The first sealing ring (401) and the second sealing ring (402) are both made of styrene-butadiene rubber.

8. The shaft end sealing structure of the dry-mix mortar mixer according to claim 5, characterized in that: The first sealing ring (401) and the second sealing ring (402) are both made of silicone rubber.

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