Flange coupling

Abstract

A flange coupling relates to the technical field of couplings and comprises an upper half coupling and a lower half coupling, and the upper half coupling and / or the lower half coupling are / is connected with an equal-diameter shaft body through a shaft circumferential limiting mechanism. The utility model solves the problems that the shaft shoulder is arranged on the shaft in the structure in the prior art, the shaft shoulder is propped against the coupling to play a role in limiting downward movement, and the shaft diameter of the connecting section of the upper shaft and the coupling needs to be reduced, so that the shaft strength is weakened.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a flange coupling. Background Art

[0002] Reactors are commonly used equipment for physical mixing or chemical reactions of substances and are widely used in industries such as chemical industry, medicine, and biological fermentation. In reactors, the connection of the stirring shaft often adopts the flange coupling type, such as Figure 2 As shown, the upper coupling 2 is connected to the upper shaft 1, the circumferential rotation of the upper coupling 2 is limited by the key 3, the upward displacement of the upper coupling 2 is limited by the upper shaft shoulder, and the downward displacement of the upper coupling 2 is limited by the combination of the pressure plate 5 and the bolt 4.

[0003] As the existing devices are used, their shortcomings are gradually exposed, mainly in the following aspects:

[0004] The traditional structure opens a shoulder on the shaft, and uses the shoulder to abut against the coupling to limit the downward movement. Since the shaft diameter of the connecting section between the upper shaft and the coupling needs to be reduced, the shaft strength is weakened.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] In view of the defects in the prior art, the utility model solves the problem that the structure in the traditional technology opens a shoulder on the shaft and uses the shoulder to abut against the coupling to limit the downward movement. Since the shaft diameter of the connecting section between the upper shaft and the coupling needs to be reduced, the shaft strength is weakened.

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] The flange coupling comprises an upper coupling and a lower coupling, wherein the upper coupling and / or the lower coupling are connected to an equal-diameter shaft body by means of a shaft circumferential limiting mechanism.

[0009] As an optimized solution, the shaft circumferential limiting mechanism includes a shaft hole and a mounting hole coaxially opened on the upper half coupling and / or the lower half coupling, and the diameter of the mounting hole is larger than that of the shaft hole.

[0010] As an optimized solution, a middle hole connecting the axial hole and the mounting hole is opened on the upper half coupling and / or the lower half coupling. The diameter of the middle hole is smaller than that of the axial hole and an axial positioning boss is formed by the diameter difference.

[0011] As an optimized solution, the shaft circumferential limiting mechanism includes a keyway opened in the shaft hole, and the equal-diameter shaft body is circumferentially constrained in the shaft hole by using the key and the keyway.

[0012] As an optimized solution, a pressure plate is provided in the mounting hole, and the pressure plate is fastened to the inner end of the equal-diameter shaft body by means of screws.

[0013] As an optimized solution, the inner end of the equal-diameter shaft body abuts against one end surface of the axial positioning boss, and the pressure plate abuts against the other end surface of the axial positioning boss.

[0014] As an optimized solution, the axial length of the middle hole is 3-8 mm.

[0015] As an optimized solution, the diameter of the middle hole is 4-10 mm smaller than the diameter of the equal-diameter shaft.

[0016] As an optimized solution, a through hole matching the screw is formed on the pressure plate, and a thread groove matching the screw is formed on the inner end of the equal-diameter shaft.

[0017] As an optimized solution, flanges are respectively provided between the opposite ends of the upper half coupling and the lower half coupling, and the two flanges are fixedly connected by a plurality of surrounding bolt assemblies.

[0018] As an optimized solution, the inner end of the upper half coupling is provided with a positioning boss, and the inner end of the lower half coupling is provided with a matching positioning groove, or the inner end of the lower half coupling is provided with a positioning boss, and the inner end of the upper half coupling is provided with a matching positioning groove.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. Under the same strength requirements, conventional structures have reduced diameters, which affects strength, so the shaft diameter design needs to be increased. However, the shaft of this scheme does not need to be reduced in diameter, which can effectively reduce the shaft diameter and save materials;

[0021] 2. In this structural scheme, the shaft does not need to be reduced in diameter, and there is no shaft shoulder as in conventional schemes, which can avoid stress concentration and effectively ensure the strength and service life of the shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the utility model in the prior art.

[0025] In the figure: 1-equal diameter shaft; 2-upper half coupling; 3-key; 4-screw; 5-pressure plate; 6-bolt assembly; 7-axial positioning boss; 8-axial hole; 9-mounting hole; 10-middle hole; 11-positioning boss; 12-positioning groove; 13-flange; 14-lower half coupling. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0027] like Figure 1 As shown, the flange coupling comprises an upper coupling 2 and a lower coupling 14, and the upper coupling 2 and / or the lower coupling 14 are connected to an equal-diameter shaft body 1 by means of a shaft circumferential limiting mechanism.

[0028] The shaft circumferential limiting mechanism comprises a shaft hole 8 and a mounting hole 9 coaxially opened on the upper half coupling 2 and / or the lower half coupling 14. The diameter of the mounting hole 9 is larger than the shaft hole 8.

[0029] The upper coupling 2 and / or the lower coupling 14 is provided with a middle hole 10 communicating with the shaft hole 8 and the mounting hole 9. The diameter of the middle hole 10 is smaller than that of the shaft hole 8 and an axial positioning boss 7 is formed by the diameter difference.

[0030] The shaft circumferential limiting mechanism includes a keyway opened in the shaft hole 8. The equal-diameter shaft body 1 is circumferentially constrained in the shaft hole 8 by the key 3 and the keyway, thereby limiting the circumferential rotation of the coupling.

[0031] A pressure plate 5 is provided in the mounting hole 9, and the pressure plate 5 is fastened to the inner end of the equal-diameter shaft body 1 by means of screws 4 to limit the upward movement of the coupling.

[0032] The inner end of the equal-diameter shaft body 1 abuts against one end surface of the axial positioning boss 7, which plays a role in positioning the shaft and limits the axial displacement of the coupling.

[0033] The pressure plate 5 abuts against the other end surface of the axial positioning boss 7 .

[0034] The axial length of the middle hole 10 is 3-8 mm.

[0035] The diameter of the middle hole 10 is 4-10 mm smaller than the diameter of the equal-diameter shaft body 1 .

[0036] A through hole matching the screw 4 is formed on the pressing plate 5 , and a thread groove matching the screw 4 is formed on the inner end of the equal-diameter shaft body 1 .

[0037] Flanges 13 are respectively provided between the opposite ends of the upper coupling 2 and the lower coupling 14 , and the two flanges 13 are fixedly connected by a plurality of bolt assemblies 6 arranged around them.

[0038] The bolt assembly 6 includes matching bolts, nuts, washers and spring washers.

[0039] The inner end of the upper coupling 2 is provided with a positioning boss 11, and the inner end of the lower coupling 14 is provided with a matching positioning groove 12, or the inner end of the lower coupling 14 is provided with a positioning boss 11, and the inner end of the upper coupling 2 is provided with a matching positioning groove 12.

[0040] The working principle of this device is:

[0041] Under the same strength requirements, conventional structures have reduced diameters, which affects strength, so the shaft diameter design needs to be increased. However, the shaft of this scheme does not need to be reduced in diameter, which can effectively reduce the shaft diameter and save materials.

[0042] In this solution, the shaft does not need to be reduced in diameter, and there is no conventional shaft shoulder, which can avoid stress concentration and effectively ensure the strength and service life of the shaft.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. Flange coupling, characterized in that: The invention comprises an upper half coupling (2) and a lower half coupling (14), wherein the upper half coupling (2) and / or the lower half coupling (14) are connected to an equal-diameter shaft body (1) by means of a shaft circumferential limiting mechanism. The shaft circumferential limiting mechanism comprises a shaft hole (8) and a mounting hole (9) coaxially opened on the upper half coupling (2) and / or the lower half coupling (14), wherein the diameter of the mounting hole (9) is larger than that of the shaft hole (8). The upper half coupling (2) and / or the lower half coupling (14) is provided with a middle hole (10) communicating with the shaft hole (8) and the mounting hole (9); the diameter of the middle hole (10) is smaller than that of the shaft hole (8) and an axial positioning boss (7) is formed by the diameter difference.

2. The flange coupling according to claim 1, characterized in that: The shaft circumferential limiting mechanism comprises a keyway opened in the shaft hole (8), and the equal-diameter shaft body (1) is circumferentially constrained in the shaft hole (8) by means of a key (3) and the keyway.

3. The flange coupling according to claim 1, characterized in that: A pressure plate (5) is provided in the mounting hole (9), and the pressure plate (5) is fastened to the inner end of the equal-diameter shaft body (1) by means of screws (4).

4. The flange coupling according to claim 3, characterized in that: The inner end of the equal-diameter shaft body (1) abuts against one end surface of the axial positioning boss (7), and the pressure plate (5) abuts against the other end surface of the axial positioning boss (7).

5. The flange coupling according to claim 1, characterized in that: The axial length of the middle hole (10) is 3-8 mm.

6. The flange coupling according to claim 1, characterized in that: The diameter of the middle hole (10) is 4-10 mm smaller than the diameter of the equal-diameter shaft body (1).

7. The flange coupling according to claim 3, characterized in that: The pressing plate (5) is provided with a through hole matching the screw (4), and the inner end of the equal-diameter shaft (1) is provided with a thread groove matching the screw (4).

8. The flange coupling according to claim 1, characterized in that: Flanges (13) are respectively provided between the opposite ends of the upper half coupling (2) and the lower half coupling (14), and the two flanges (13) are fixedly connected by a plurality of bolt assemblies (6) arranged around them.

9. The flange coupling according to claim 8, characterized in that: The bolt assembly (6) comprises matching bolts, nuts, washers and spring washers.

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