Stirring shaft fixing mechanism and stirrer

Abstract

The invention relates to chemical machinery and process technologies, and discloses a stirring shaft fixing mechanism which comprises a shaft sleeve and a connecting shaft which are connected with a stirring shaft, a containing groove with a downward opening is formed in the shaft sleeve, one end of the connecting shaft is installed in the containing groove, and the other end of the connecting shaft is connected with a base in a stirrer body. The peripheral surface of the connecting shaft is attached to the inner wall of the containing groove, the stirring shaft and the connecting shaft are connected through the shaft sleeve, the opening of the shaft sleeve faces downwards, impurities are prevented from entering the stirring device, and the service life of the stirring device is prolonged. In addition, the invention also provides a stirrer, which comprises a stirrer main body, a stirring shaft and the stirring shaft fixing mechanism provided by the invention.

Description

Technical Field

[0001] The present invention relates to chemical machinery and process technology, and in particular to a stirring shaft fixing mechanism. In addition, it also relates to a stirrer. Background Art

[0002] As environmental protection requirements become increasingly stringent, more environmentally friendly white mud is gradually being used as a desulfurization agent in industrial production processes. This measure not only helps to reduce sulfur dioxide emissions, but also improves the company's environmental image and social responsibility.

[0003] However, in actual operation, white mud inevitably contains a certain proportion of fine impurities, which have a certain impact on existing production equipment. For example, in the process of using white mud to desulfurize and enter the limestone slurry tank, since the white mud contains a large number of impurities with fine particles (about 2-5 mm in diameter), these impurities are difficult to completely remove during the filtration process, resulting in them entering the limestone slurry tank and easily deposited in the gap between the connecting shaft and the stirring shaft. In the long run, this sediment will aggravate the wear of the connection between the connecting shaft and the stirring shaft, shorten its service life, and may cause the failure of the stirring device. Frequent box withdrawal, slurry discharge and maintenance not only increase maintenance costs, but also affect the normal operation of the production line. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a stirring shaft fixing mechanism to prevent impurities from entering, which is beneficial to prolonging the service life of the stirring device.

[0005] The technical problem to be solved by the present invention is also to provide a stirrer, which prevents impurities from entering and is conducive to extending the service life of the stirrer.

[0006] In order to achieve the above-mentioned objectives, on the one hand, the present invention provides a stirring shaft fixing mechanism for connecting the stirring shaft and the stirring shaft, including a sleeve and a connecting shaft connected to the stirring shaft, the sleeve being formed with a receiving groove with an opening facing downward, one end of the connecting shaft being installed in the receiving groove, and the other end being connected to a base in the stirring shaft body, and the outer peripheral surface of the connecting shaft being in contact with the inner wall of the receiving groove.

[0007] Preferably, the stirring shaft fixing mechanism further comprises a liquid inlet unit for injecting lubricating medium into the containing groove.

[0008] Preferably, the liquid inlet unit comprises a liquid inlet located on the side wall of the accommodating tank, a flow channel connected to the liquid inlet, and a lubricating medium supply device connected to one end of the flow channel away from the liquid inlet, and the flow channel is located inside the stirring shaft.

[0009] Preferably, a bearing is installed in the accommodating groove, and the bearing is located between the accommodating groove and the outer wall of the connecting shaft.

[0010] Preferably, an overflow protrusion is provided on the sleeve, and the overflow protrusion is arranged in a ring-shaped and continuous manner along the inner wall of the accommodating groove. The overflow protrusion is located on the outer side of the bearing, and an overflow groove matching the overflow protrusion is formed on the outer wall of the connecting shaft.

[0011] Preferably, the overflow protrusion includes a first protrusion and a second protrusion, the first protrusion is located on a side close to the bearing, the second protrusion is located on an outer side of the first protrusion, and both the first protrusion and the second protrusion abut against the overflow groove.

[0012] Preferably, the cross-sectional area of ​​the first protrusion is greater than the cross-sectional area of ​​the second protrusion, and the overflow groove is structured to be suitable for contacting the entire end surfaces of the first protrusion and the second protrusion.

[0013] Preferably, the connecting shaft includes a first shaft portion and a second shaft portion connected to the first shaft portion, the first shaft portion is installed in the accommodating groove, the second shaft portion is connected to the base, and the cross-sectional area of ​​the first shaft portion is smaller than the cross-sectional area of ​​the second shaft portion.

[0014] A second aspect of the present invention provides an agitator, comprising an agitator body, an agitator shaft installed in the agitator body, and the agitator shaft fixing mechanism of the present invention.

[0015] Preferably, at least two stirring discs are installed on the stirring shaft, and the stirring discs are arranged at intervals along the length direction of the stirring shaft. A driving shaft is provided at one end of the stirring shaft away from the sleeve, and the driving shaft is connected to a driving component to drive the stirring shaft to rotate. Through the above technical scheme, the stirring shaft fixing mechanism provided by the present invention connects the stirring shaft and the agitator body through a downward-opening receiving groove and a connecting shaft provided on the shaft sleeve, which can effectively prevent particulate impurities from entering the gap between the receiving groove and the connecting shaft, reduce wear, and help to extend the service life of the stirring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the stirring shaft fixing mechanism of the present invention; Figure 2 It is a structural schematic diagram of the shaft sleeve of the present invention; Figure 3 It is a schematic diagram of the structure of the shaft sleeve and the connecting shaft of the present invention; Figure 4 It is a schematic structural diagram of the overflow protrusion of the present invention.

[0017] Description of Reference Numerals 1. Driving shaft; 2. Stirring shaft; 3. Bushing; 3-1. Accommodating groove; 3-2. Liquid inlet; 4. Connecting shaft; 4-1. First shaft portion; 4-2. Second shaft portion; 5. Stirring disc; 6. Flow channel; 7. Bearing; 8. Overflow protrusion; 8-1. First protrusion; 8-2. Second protrusion; 9. Base. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0019] The present invention provides these embodiments to make the present invention thorough and complete, and fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0020] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 of the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] In addition, the words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly perpendicular, but is within the tolerance range. "Parallel" is not strictly parallel, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0022] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0023] All terms used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0024] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0025] See also Figure 1 The present invention discloses a stirring shaft fixing mechanism for connecting the stirring shaft 2 and the stirring body, comprising a shaft sleeve 3 and a connecting shaft 4 connected to the stirring shaft 2. A accommodating groove 3-1 with an opening facing downward is formed on the shaft sleeve 3. One end of the connecting shaft 4 is installed in the accommodating groove 3-1 and the other end is connected to a base 9 in the stirring body. The outer peripheral surface of the connecting shaft 4 is in contact with the inner wall of the accommodating groove 3-1. It should be noted that the opening facing downward is toward the direction of gravity. The stirring shaft 2 and the connecting shaft 4 are connected through the shaft sleeve 3, and the opening of the shaft sleeve 3 faces downward. Impurities at the connection part are more likely to slide down under the action of gravity. When the stirring shaft 2 rotates, impurities are not easy to enter the shaft sleeve 3. Avoiding the entry of impurities can extend the service life of the shaft sleeve 3 and the connecting shaft 4, reduce the frequency of slurry discharge and maintenance of the device, and thus extend the service life of the stirring device.

[0026] In some embodiments, the stirring shaft fixing mechanism also includes a liquid inlet unit for injecting a lubricating medium into the receiving groove 3-1. The lubricating medium can reduce the friction between the connecting shaft 4 and the sleeve 3, reduce wear, and take away the heat generated by friction. At the same time, it cools the connecting shaft 4 and the sleeve 3 to keep them at a suitable working temperature to prevent overheating from causing deformation of the connecting shaft 4 or the sleeve 3. In addition, the medium is filled between the connecting shaft 4 and the sleeve 3, and a layer of liquid barrier is formed by continuously supplying the lubricating medium to prevent impurities from entering the connection part. The lubricating medium can be continuously supplied to the receiving groove 3-1. The lubricating medium is, for example, mineral oil, lithium-based grease, silicone oil, etc.

[0027] In some embodiments, the liquid inlet unit includes a liquid inlet 3-2 located on the side wall of the accommodating groove 3-1, a flow channel 6 connected to the liquid inlet 3-2, and a lubricating medium supply device connected to the end of the flow channel 6 away from the liquid inlet 3-2. The flow channel 6 is located in the stirring shaft 2, and the flow channel 6 is arranged on the stirring shaft 2. The flow flows from the end of the stirring shaft 2 away from the sleeve 3 to the liquid inlet 3-2, which can save external space and make the entire device more compact. At the same time, it reduces the loss of the lubricating medium during the transmission process, ensures that the lubricating medium can accurately reach the predetermined position, and improves the lubrication efficiency.

[0028] In some embodiments, a bearing 7 is installed in the accommodating groove 3-1. The bearing 7 is located between the accommodating groove 3-1 and the outer wall of the connecting shaft 4. The bearing 7 can avoid direct contact between the connecting shaft 4 and the sleeve 3, thereby avoiding friction and wear. The bearing 7 serves as a friction-reducing element, which effectively reduces the friction and wear between the connecting shaft 4 and the sleeve 3 during operation, which is beneficial to extending the service life of the equipment. At the same time, the bearing 7 can make the stirring shaft 2 rotate more smoothly, reduce energy loss, and improve rotation efficiency.

[0029] In some embodiments, an overflow protrusion 8 is provided on the sleeve 3, and the overflow protrusion 8 is arranged in a ring-shaped continuous manner along the inner wall of the accommodating groove 3-1. The overflow protrusion 8 is located on the outer side of the bearing 7, and the outer side is the side close to the opening of the sleeve 3. An overflow groove matching the overflow protrusion 8 is formed on the outer wall of the connecting shaft 4. The overflow protrusion 8 is located on the outer side of the bearing 7 and can limit the bearing 7 to prevent the bearing 7 from moving outward, ensuring that the bearing 7 is always in the correct position, avoiding excessive wear of the connecting shaft 4 and the sleeve 3 or other mechanical failures due to the displacement of the bearing 7. The cooperation between the overflow protrusion 8 and the overflow groove makes the connection between the connecting shaft 4 and the stirring shaft 2 tighter, which can reduce vibration and noise caused by looseness and improve the stability of the entire mechanism. In addition, the overflow protrusion 8 can optimize the flow path of the lubricating medium, which is beneficial to avoid leakage of the lubricating medium. After the lubricating medium enters the accommodating groove 3-1, it is evenly distributed along the outer surface of the connecting shaft 4. The overflow protrusion 8 can slow down the flow of the lubricating medium out of the sleeve 3, ensuring that the bearing 7 is fully lubricated. In some embodiments, the overflow protrusion 8 includes a first protrusion 8-1 and a second protrusion 8-2. The first protrusion 8-1 is located on the side close to the bearing 7, and the second protrusion 8-2 is located on the outside of the first protrusion 8-1. The first protrusion 8-1 and the second protrusion 8-2 are both abutted against the overflow groove. The first protrusion 8-1 is close to the side of the bearing 7, which can effectively limit the axial position of the bearing and prevent the bearing from moving axially. The cooperation between the first protrusion 8-1 and the second protrusion 8-2 and the overflow groove forms a multiple sealing structure, which effectively prevents impurities from entering the bearing and is beneficial to avoid leakage of the lubricating medium.

[0030] In some embodiments, the cross-sectional area of ​​the first protrusion 8-1 is greater than the cross-sectional area of ​​the second protrusion 8-2, and the structure of the overflow groove is configured to be suitable for contacting the entire end surface of the first protrusion 8-1 and the second protrusion 8-2. Regarding the cross-sectional area of ​​the protrusion, it should be noted that the first protrusion 8-1 and the second protrusion 8-2 are arranged along the circumferential direction of the sleeve 3. When a section perpendicular to the radial direction of the sleeve 3 is taken, the cross-sectional shape of each protrusion can be seen, and the area of ​​the cross-section is the cross-sectional area.

[0031] In some embodiments, the connecting shaft 4 includes a first shaft portion 4-1 and a second shaft portion 4-2 connected to the first shaft portion 4-1, the first shaft portion 4-1 is installed in the receiving groove 3-1, the second shaft portion 4-2 is connected to the base 9, the cross-sectional area of ​​the first shaft portion 4-1 is smaller than the cross-sectional area of ​​the second shaft portion 4-2, and the first shaft portion 4-1 cooperates with the bearing 7 in the receiving groove 3-1, which can reduce the contact area between the first shaft portion 4-1 and the sleeve 3, thereby reducing the friction between the first shaft portion 4-1 and the sleeve 3, reducing the resistance of the stirring shaft 2 during rotation, and improving the transmission efficiency. The second shaft portion 4-2 is connected to the base 9, and the large cross-sectional area can improve the stability of the connection between the connecting shaft 4 and the stirring shaft 2 during work, reduce vibration and swing, and make the stirring device run more smoothly. Regarding the cross-sectional area of ​​the shaft portion, it should be noted that the area of ​​the cross section formed by cutting each shaft portion through a horizontal plane perpendicular to the axis of the connecting shaft 4 is the cross-sectional area.

[0032] The present invention also provides an agitator, comprising an agitator body, an agitator shaft 2 installed in the agitator body, and the agitator shaft fixing mechanism provided by the present invention. The agitator shaft 2 of the agitator is connected to the connecting shaft 4 through a shaft sleeve 3, and the opening of the shaft sleeve 3 faces downward, thereby improving the sealing of the connection between the agitator shaft 2 and the connecting shaft 4, preventing impurities from entering, and helping to extend the service life of the agitator.

[0033] In some embodiments, at least two stirring discs 5 are installed on the stirring shaft 2, and each stirring disc 5 is arranged at intervals along the length direction of the stirring shaft 2. A driving shaft 1 is provided at one end of the stirring shaft 2 away from the shaft sleeve 3, and the driving shaft 1 is connected to a driving component to drive the stirring shaft 2 to rotate. The end of the stirring shaft 2 away from the driving shaft 1 is connected to the shaft sleeve 3. The provision of multiple stirring discs 5 ensures that the materials are more evenly mixed in the container. Each stirring disc 5 generates shear force at different heights, which helps to break up clumps and promote the uniform distribution of liquid or solid particles. The stirring discs 5 at different heights produce different stirring effects, forming a three-dimensional stirring flow field, so that the materials can be fully mixed in both vertical and horizontal directions.

[0034] In order to better understand the technical content of the present invention, the relatively preferred technical features are described below.

[0035] refer to Figures 1 to 4The present invention provides a stirring shaft fixing mechanism for connecting the stirring shaft 2 and the stirring body, comprising a sleeve 3 and a connecting shaft 4 connected to the stirring shaft 2, a receiving groove 3-1 with an opening facing downward is formed on the sleeve 3, one end of the connecting shaft 4 is installed in the receiving groove 3-1, and the other end is connected to a base 9 in the stirring body, the outer peripheral surface of the connecting shaft 4 is in contact with the inner wall of the receiving groove 3-1, a liquid inlet 3-2 on the side wall of the receiving groove 3-1, a flow channel 6 connected to the liquid inlet 3-2, and a lubricating medium supply device connected to the end of the flow channel 6 away from the liquid inlet 3-2, the flow channel 6 is located in the stirring shaft 2, a bearing 7 is installed in the receiving groove 3-1, and the bearing 7 is located between the inner wall of the receiving groove 3-1 and the outer wall of the connecting shaft 4, an overflow protrusion 8 is arranged on the sleeve 3, and the overflow protrusion 8 is continuously arranged in a ring along the inner wall of the receiving groove 3-1, and the overflow The protrusion 8 is located on the outer side of the bearing 7, and an overflow groove matching the overflow protrusion 8 is formed on the outer wall of the connecting shaft 4. The overflow protrusion 8 includes a first protrusion 8-1 and a second protrusion 8-2. The first protrusion 8-1 is located on the side close to the bearing 7, and the second protrusion 8-2 is located on the outer side of the first protrusion 8-1. The first protrusion 8-1 and the second protrusion 8-2 are abutted against the overflow groove. The cross-sectional area of ​​the first protrusion 8-1 is larger than the cross-sectional area of ​​the second protrusion 8-2. The structure of the overflow groove is set to be suitable for contacting the entire end surface of the first protrusion 8-1 and the second protrusion 8-2. The connecting shaft 4 includes a first shaft portion 4-1 and a second shaft portion 4-2 connected to the first shaft portion 4-1. The first shaft portion 4-1 is connected to the accommodating groove 3-1, and the second shaft portion 4-2 is connected to the base 9. The cross-sectional area of ​​the first shaft portion 4-1 is smaller than the cross-sectional area of ​​the second shaft portion 4-2.

[0036] The above technical solution has the following advantages: the stirring shaft 2 and the connecting shaft 4 are connected through the sleeve 3, and the opening of the sleeve 3 faces downward, so that impurities in the connection part are more likely to slide down under the action of gravity. When the stirring shaft 2 rotates, impurities are not easy to enter the sleeve 3, which can extend the service life of the sleeve 3 and the connecting shaft 4, reduce the frequency of slurry discharge and maintenance of the device, and thus extend the service life of the stirring device.

[0037] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0038] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A stirring shaft fixing mechanism for connecting a stirring shaft (2) and a stirring body, characterized in that: The invention comprises a shaft sleeve (3) connected to the stirring shaft (2) and a connecting shaft (4); the shaft sleeve (3) is formed with a receiving groove (3-1) with an opening facing downward; one end of the connecting shaft (4) is installed in the receiving groove (3-1) and the other end is connected to a base (9) in the stirring body; the outer peripheral surface of the connecting shaft (4) is in contact with the inner wall of the receiving groove (3-1).

2. The stirring shaft fixing mechanism according to claim 1, characterized in that: The stirring shaft fixing mechanism also includes a liquid inlet unit used for injecting lubricating medium into the containing groove (3-1).

3. The stirring shaft fixing mechanism according to claim 2, characterized in that: The liquid inlet unit comprises a liquid inlet (3-2) located on a side wall of the accommodating groove (3-1), a flow channel (6) connected to the liquid inlet (3-2), and a lubricating medium supply device connected to an end of the flow channel (6) away from the liquid inlet (3-2), wherein the flow channel (6) is located inside the stirring shaft (2).

4. The stirring shaft fixing mechanism according to any one of claims 1 to 3, characterized in that: A bearing (7) is installed in the accommodating groove (3-1), and the bearing (7) is located between the inner wall of the accommodating groove (3-1) and the outer wall of the connecting shaft (4).

5. The stirring shaft fixing mechanism according to claim 4, characterized in that: The shaft sleeve (3) is provided with an overflow protrusion (8), the overflow protrusion (8) is continuously arranged in a ring shape along the inner wall of the accommodating groove (3-1), the overflow protrusion (8) is located on the outer side of the bearing (7), and an overflow groove matching the overflow protrusion (8) is formed on the outer wall of the connecting shaft (4).

6. The stirring shaft fixing mechanism according to claim 5, characterized in that: The overflow protrusion (8) comprises a first protrusion (8-1) and a second protrusion (8-2), the first protrusion (8-1) being located on a side close to the bearing (7), the second protrusion (8-2) being located on the outside of the first protrusion (8-1), and the first protrusion (8-1) and the second protrusion (8-2) both being in contact with the overflow groove.

7. The stirring shaft fixing mechanism according to claim 6, characterized in that: The cross-sectional area of ​​the first protrusion (8-1) is greater than the cross-sectional area of ​​the second protrusion (8-2), and the overflow groove is structured to be suitable for contacting the entire end surfaces of the first protrusion (8-1) and the second protrusion (8-2).

8. The stirring shaft fixing mechanism according to any one of claims 1 to 3, characterized in that: The connecting shaft (4) comprises a first shaft portion (4-1) and a second shaft portion (4-2) connected to the first shaft portion (4-1), the first shaft portion (4-1) being installed in the receiving groove (3-1), the second shaft portion (4-2) being connected to the base (9), and the cross-sectional area of ​​the first shaft portion (4-1) being smaller than the cross-sectional area of ​​the second shaft portion (4-2).

9. A stirrer, characterized in that: The invention comprises a stirrer body, a stirrer shaft (2) installed in the stirrer body, and a stirrer shaft fixing mechanism according to any one of claims 1 to 8.

10. The stirrer according to claim 9, characterized in that At least two stirring discs (5) are mounted on the stirring shaft (2), and the stirring discs (5) are arranged at intervals along the length direction of the stirring shaft (2). A driving shaft (1) is arranged at one end of the stirring shaft (2) away from the shaft sleeve (3), and the driving shaft (1) is connected to a driving component to drive the stirring shaft (2) to rotate.

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