Hinge structure for synchronous grouting stirring shaft of shield tunneling machine

Abstract

The utility model relates to the technical field of stirring shaft structures, in particular to a hinge structure for a synchronous grouting stirring shaft of a shield tunneling machine, which comprises a slurry tank, a stirring driver, a driving bearing package, a grouting pump and a stirring shaft, the stirring shaft is mounted in the slurry tank, the driving bearing package is mounted on the left side of the stirring shaft, and the grouting pump is mounted on the driving bearing package. A stirring drive is mounted on the driving bearing package, a grouting pump is mounted below the slurry tank, the driven shaft package is mounted on the right side of the stirring shaft, the universal coupling is mounted between the driven shaft package and the stirring shaft, and the driven shaft package is mounted on the right side of the driven shaft package. When the stirring shaft rotates to generate small deformation, one end of the universal coupling deflects, the other end of the universal coupling is kept horizontal and is connected with the driven shaft, at the moment, the driven shaft can be prevented from deflecting and only rotates around the shaft, and therefore sealing eccentric wear and bearing deflection are reduced, sealing eccentric wear and bearing eccentric load are reduced, and the slurry leakage risk of a bearing package is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring shaft structures, in particular to an articulated structure for a synchronous grouting stirring shaft of a shield machine. Background Art

[0002] When the shield machine is excavating, it is necessary to inject grout into the gap between the pipe segment and the outer diameter of the excavation. Synchronous grouting is a set of devices that integrate grouting and stirring slurry. Since the shield machine needs to inject a large amount of slurry during excavation, the slurry tank needs to be designed to be longer due to the space limitations of the shield machine trolley. Since the stirring device is installed along the length of the stirring shaft, and the stirring blades are installed on the stirring shaft. Since the stirring shaft is a slender rod with low rod stiffness, when the stirring shaft rotates and stirs, the slender rod will become unstable and have small bending deformation. At this time, you can see the driven shaft swinging at the bearing package. Long-term rotation and swinging will damage the bearing package bearings and seals, resulting in leakage and damage to the bearing package.

[0003] Therefore, in order to increase the service life of the bearing package and prevent the bearing package from leaking, the existing technology has improved the bearing package by changing the bearing package from a single bearing structure to a double bearing structure. After testing and application, the bearing package leakage problem has been significantly improved. However, due to processing errors and installation errors, it was found that a small number of bearing packages still had leakage, and the on-site inspection found that the bearing package still had a certain amount of swing. If the bearing package is found to be leaking during the shield machine excavation, the bearing package wearing parts need to be replaced. At this time, the machine needs to be shut down to repair the bearing package, which may delay the construction period and cause losses to the project.

[0004] Therefore, the present invention provides an articulated structure for a synchronous grouting and stirring shaft of a shield machine to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is as follows: due to processing errors and installation errors, it is found that a small number of bearing packages of the existing grouting stirring shaft hinge structure still have leakage, and during on-site inspection, it is found that the bearing package still has a certain swing. If the bearing package is found to be leaking during shield machine excavation, it is necessary to replace the bearing package wearing parts. At this time, the machine needs to be shut down to repair the bearing package, which may delay the construction period and cause losses to the project.

[0006] The utility model provides the following technical solutions: an articulated structure for a synchronous grouting stirring shaft of a shield machine, comprising a slurry tank, a stirring drive, an active bearing package, a grouting pump and a stirring shaft, wherein a stirring shaft is installed in the slurry tank, an active bearing package is installed on the left side of the stirring shaft, a stirring drive is installed on the active bearing package, a grouting pump is installed below the slurry tank, and also comprises a driven bearing package and a universal coupling, wherein the driven bearing package is installed on the right side of the stirring shaft, and a universal coupling is installed between the driven bearing package and the stirring shaft, when the stirring shaft rotates and produces a small deformation, one end of the universal coupling will deflect, and the other end of the coupling remains horizontal and connected to the driven shaft, at which time the driven shaft can avoid deflection and only rotates around the axis, thereby reducing seal eccentric wear and bearing deflection, thereby reducing seal eccentric wear and bearing eccentric load, and reducing the risk of slurry leakage from the bearing package.

[0007] Preferably, the driven bearing package includes a driven shaft, a connecting pin, a seal, a bearing and a housing fastener. The driven shaft is installed on one side of the universal joint. A pin hole is opened on the driven shaft, and a connecting pin is installed in the pin hole. A seal is installed on the right side of the connecting pin. The seal is fixedly installed on the inner wall of the slurry tank and the driven shaft fits with the hole inside the seal. A bearing is installed on the right side of the seal, there are two bearings and the bearings are located outside the slurry tank, and housing fasteners are installed outside the bearing.

[0008] Preferably, it is characterized in that: the outer diameter of the connecting pin is smaller than the inner diameter of the driven shaft pin hole.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The utility model sets a universal coupling and improves the driven bearing package. When the agitator shaft rotates and produces a small deformation, one end of the universal coupling will deflect, and the other end of the coupling remains horizontal and connected to the driven shaft. At this time, the driven shaft can avoid deflection and only rotates around the axis, thereby reducing seal eccentric wear and bearing deflection, thereby reducing the swing amplitude of the driven shaft after the transformation, reducing the risk of bearing package leakage, extending the service life of the bearing package, reducing the risk of construction shutdown due to bearing package leakage and saving excavation cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1It is a schematic diagram of the structure of the grouting device of the utility model;

[0013] Figure 2 It is a schematic diagram of the driven bearing package and coupling of the utility model;

[0014] Figure 3 It is a schematic diagram of the push and lift installation of the utility model.

[0015] In the figure: 1, stirring drive; 2, active bearing package; 3, slurry tank; 4, grouting pump; 5, stirring shaft; 6, driven bearing package; 7, universal coupling; 8, driven shaft; 81, pin hole; 9, connecting pin; 10, seal; 11, bearing. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model for which protection is sought, but merely represents some embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0017] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention product is usually placed when in use. Such terms are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention.

[0019] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The disclosed embodiment aims to solve the problem that due to processing errors and installation errors, a small number of bearing packages of the existing grouting stirring shaft are still leaking, and the bearing package is still swinging during the on-site inspection. If the bearing package is found to be leaking during the shield machine excavation, it is necessary to replace the bearing package wearing parts. At this time, the machine needs to be shut down for maintenance of the bearing package, which may delay the construction period and cause losses to the project. In view of this, the disclosed embodiment proposes an articulated structure for the synchronous grouting stirring shaft of the shield machine. The articulated structure is improved by setting a universal coupling and improving the driven bearing package. When the stirring shaft rotates and produces a small deformation, one end of the universal coupling will deflect, and the other end of the coupling remains horizontal and connected to the driven shaft. At this time, the driven shaft can avoid deflection and only rotates around the axis, thereby reducing the eccentric wear of the seal and the deflection of the bearing, and then the swing amplitude of the driven shaft after the transformation is reduced, reducing the risk of bearing package leakage, extending the service life of the bearing package, reducing the risk of downtime for maintenance due to bearing package leakage, and saving the excavation cycle.

[0021] like Figures 1 to 3 As shown, an articulated structure for a synchronous grouting stirring shaft 5 of a shield machine includes a slurry tank 3, a stirring drive 1, an active bearing package 2, a grouting pump 4 and a stirring shaft 5, wherein the stirring shaft 5 is installed in the slurry tank 3, the active bearing package 2 is installed on the left side of the stirring shaft 5, the stirring drive 1 is installed on the active bearing package 2, the grouting pump 4 is installed below the slurry tank 3, and also includes a driven bearing package 6 and a universal coupling 7, the driven bearing package 6 is installed on the right side of the stirring shaft 5, and the universal coupling 7 is installed between the driven bearing package 6 and the stirring shaft 5, when the stirring shaft 5 rotates and produces a small deformation, one end of the universal coupling 7 will deflect, and the other end of the coupling remains horizontal and connected to the driven shaft 8, at this time the driven shaft 8 can avoid deflection and only rotates around the axis, thereby reducing the eccentric wear of the seal and the deflection of the bearing 11, thereby reducing the eccentric wear of the seal and the eccentric load of the bearing 11, and reducing the risk of leakage of the bearing 11 package.

[0022] like Figures 1 to 3As shown, the driven bearing package 6 includes a driven shaft 8, a connecting pin 9, a seal 10, a bearing 11 and a housing fastener. The driven shaft 8 is installed on one side of the universal coupling 7, and the driven shaft 8 is used to rotate in coordination with the rotation of the stirring shaft 5; a pin hole 81 is provided on the driven shaft 8, and the pin hole 81 is used to insert the connecting pin 9; a connecting pin 9 is installed in the pin hole 81, and a seal 10 is installed on the right side of the connecting pin 9, and the seal 10 is fixedly installed on the inner wall of the slurry tank 3 and the driven shaft 8 is fitted with the hole inside the seal 10; the seal 10 is used to seal the slurry tank 3 to prevent leakage; a bearing 11 is installed on the right side of the seal 10, and there are two bearings 11 and the bearings 11 are located outside the slurry tank 3, and housing fasteners are installed outside the bearing 11.

[0023] When the stirring shaft 55 rotates to stir the slurry, since the stirring shaft 5 is a rod with low rigidity, the stirring shaft 5 will undergo a small disturbance bending deformation in the cross-sectional direction. At this time, a coupling is added between the stirring shaft 5 and the driven shaft 8. When the stirring shaft 5 rotates and produces a small deformation, one end of the universal coupling 7 will deflect, and the other end of the coupling remains horizontal and connected to the driven shaft 8. At this time, the driven shaft 8 can avoid deflection and only rotates around the axis, thereby reducing seal eccentric wear and bearing 11 deflection.

[0024] like Figures 1 to 3 As shown, the outer diameter of the connecting pin 9 is smaller than the inner diameter of the pin hole 81 of the driven shaft 8. The outer diameter of the connecting pin 9 is set to be smaller than the inner diameter of the pin hole 81 of the driven shaft 8 so that when the stirring shaft 5 undergoes a small bending deformation, the horizontal dimension of the shaft becomes shorter. Since the outer diameter of the connecting pin 9 is smaller than the pin hole 81 of the driven shaft 8, the coupling can move horizontally for compensation.

[0025] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An articulated structure for a synchronous grouting stirring shaft (5) of a shield machine, comprising a slurry tank (3), a stirring drive (1), an active bearing package (2), a grouting pump (4) and a stirring shaft (5), wherein the stirring shaft (5) is installed in the slurry tank (3), the active bearing package (2) is installed on the left side of the stirring shaft (5), the stirring drive (1) is installed on the active bearing package (2), and the grouting pump (4) is installed below the slurry tank (3), characterized in that: It also includes a driven bearing package (6) and a universal coupling (7), wherein the driven bearing package (6) is installed on the right side of the stirring shaft (5), and the universal coupling (7) is installed between the driven bearing package (6) and the stirring shaft (5).

2. The hinge structure for a synchronous grouting and stirring shaft (5) of a shield machine according to claim 1, characterized in that: The driven bearing package (6) comprises a driven shaft (8), a connecting pin (9), a sealing member (10), a bearing (11) and a housing fastener. The driven shaft (8) is mounted on one side of the universal joint (7). A pin hole (81) is provided on the driven shaft (8). A connecting pin (9) is installed in the pin hole (81). A sealing member (10) is installed on the right side of the connecting pin (9). The sealing member (10) is fixedly mounted on the inner wall of the slurry tank (3) and the driven shaft (8) is fitted with a hole inside the sealing member (10). A bearing (11) is installed on the right side of the sealing member (10). There are two bearings (11) and the bearings (11) are located outside the slurry tank (3). A housing fastener is installed outside the bearing (11).

3. The hinge structure for a synchronous grouting and stirring shaft (5) of a shield machine according to claim 2, characterized in that: The outer diameter of the connecting pin (9) is smaller than the inner diameter of the pin hole (81) of the driven shaft (8).

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