Telescopic device for slurry discharge pipeline of vertical shaft heading machine

Abstract

The utility model relates to the technical field of vertical shaft heading machines, in particular to a telescopic device for a slurry discharging pipeline of a vertical shaft heading machine, which comprises a telescopic pipe, a fixed end support and a movable end support, one end of the telescopic pipe is movably connected with the fixed end support, and the other end of the telescopic pipe is movably connected with the movable end support. The telescopic pipe comprises a telescopic outer pipe body and a telescopic inner pipe body, the telescopic inner pipe body is slidably installed in the telescopic outer pipe body, and a sealing piece and an oil injection cup are fixedly installed on the outer side of the end, close to the telescopic inner pipe body, in the telescopic outer pipe body, so that sealing can be achieved when pressure difference exists inside and outside a pipeline, and meanwhile the telescopic inner pipe body can move synchronously with a telescopic arm of the vertical shaft heading machine. Synchronous expansion and contraction of the pipeline are realized, and equipment salvage and replacement caused by failure of a relatively long hose are avoided; the problems that an existing slurry discharging pipeline is prone to clamping stagnation, abrasion and leakage are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft boring machines, in particular to a telescopic device for a slurry discharge pipeline of a shaft boring machine. Background Art

[0002] In recent years, the development of underground space in my country has accelerated and expanded. This process requires shaft boring machines (TBMs) to operate in tunnel boring machine launch and receiving shafts, tunnel ventilation shafts, urban drainage system shafts, underground parking garages and storage shafts, mining shafts, bridge engineering shafts, and missile silos. As a new type of caisson construction equipment and method, TBMs and their construction methods offer unique technical advantages over existing technologies, including safety, efficiency, minimal site occupation, wide geological adaptability, and minimal impact on the surrounding environment. They are particularly suitable for use in large-diameter and deep shaft projects.

[0003] During the operation of a shaft boring machine, mud and water circulation is typically used to bring excavated soil to the surface. As the milling head continuously retracts and digs, existing slurry drainage pipes use long hoses to achieve this telescopic function and coordinate with the milling head's telescopic excavation. However, these long hoses can become stuck and wear out during use, causing the tunnel boring machine to cease operation. Furthermore, the pressure differential between the inside and outside of these pipes during use can easily lead to leakage, resulting in dust contamination and slurry leakage.

[0004] Therefore, the utility model provides a telescopic device for a slurry discharge pipeline of a shaft boring machine to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing slurry discharge pipeline is prone to getting stuck, being worn and leaking.

[0006] The utility model provides the following technical solution: a telescopic device for a slurry discharge pipeline of a vertical shaft boring machine, comprising a telescopic tube, a fixed end bracket and a movable end bracket, wherein one end of the telescopic tube is movably connected to the fixed end bracket, and the other end of the telescopic tube is movably connected to the movable end bracket, and is characterized in that the telescopic tube comprises a telescopic outer tube and a telescopic inner tube, a telescopic inner tube is slidably installed in the telescopic outer tube, and a seal and an oil filling cup are fixedly installed on the outside of one end of the telescopic outer tube close to the telescopic inner tube.

[0007] The telescopic outer tube includes a first flange, a support tube and a sealing tube. The outside of the first flange is movably connected to the fixed end bracket through a detachable connecting piece. One end of the support tube is fixedly installed in the first flange, and the other end of the support tube is fixedly connected to one end of the sealing tube. The telescopic inner tube is slidably installed in the sealing tube, and the telescopic inner tube is movably connected to the movable end bracket through a detachable connecting piece.

[0008] The telescopic inner tube includes a second flange and an inner tube body. The inner tube body is slidably installed in the sealing tube. The second flange is fixedly installed at the end of the inner tube body away from the first flange. The second flange is movably connected to the movable end bracket through a detachable connecting piece.

[0009] The sealing tube is symmetrically provided with a first groove, a second groove and a third groove in sequence from both ends inward. A dustproof ring is fixedly installed in the first groove to prevent dust from entering and leaving the telescopic tube. A sealing member is fixedly installed in the second groove to maintain pressure inside and outside the telescopic tube. An oil filling cup is fixedly installed between the dustproof ring and the sealing member along the radial direction of the sealing tube to improve lubrication.

[0010] A third groove is symmetrically provided between adjacent sealing members, and a support ring for supporting and guiding the telescopic inner tube is fixedly installed in the third groove.

[0011] The detachable connecting piece and the movable end bracket are arranged to be clearance-fitted with each other for displacement.

[0012] The first flange and the second flange are axially provided with light holes for connecting to other slurry discharge pipeline flanges, and the first flange and the second flange are radially provided with light holes for connecting to the connecting parts.

[0013] The outer surface of the inner tube is provided with an electroplated hard chromium layer that matches the dust ring, the support ring and the sealing member.

[0014] The fixed end bracket is connected to the fixed arm of the shaft boring machine, and the movable end bracket is connected to the telescopic arm of the shaft boring machine. Both the fixed end bracket and the movable end bracket are provided with mounting points for matching connectors.

[0015] The beneficial effects of the utility model are as follows:

[0016] By providing a dust ring, support ring, and seal, this utility model can also provide a sealing function when there is a pressure difference between the inside and outside of the pipeline. At the same time, the fixed end bracket is connected to the telescopic outer tube via a pin to prevent the telescopic outer tube from moving. The movable end bracket is connected to the telescopic inner tube via a pin to enable the telescopic inner tube to move synchronously with the telescopic arm of the shaft boring machine, realizing the synchronous telescopic function of the pipeline. This avoids the need for equipment salvage and replacement due to failure of long hoses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. 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 any creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic structural diagram of the telescopic outer tube in the present utility model;

[0020] Figure 3 This is a schematic structural diagram of the telescopic inner tube in the present utility model;

[0021] Figure 4 For this utility model Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 5 For this utility model Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0023] In the figure: 1. Telescopic tube; 11. Telescopic outer tube; 111. First flange; 112. Support tube; 113. Sealing tube; 114. Connector; 12. Telescopic inner tube; 121. Second flange; 122. Inner tube body; 2. Fixed end bracket; 3. Moving end bracket; 4. Seal; 5. Oil filling cup; 6. Dust ring; 7. Support ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the utility model for protection, but merely represents some of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] 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, it does not need to be further defined or explained in subsequent drawings.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back" and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings, or the positions or locations in which the product of this utility model is typically placed when in use. Such terms are used solely to facilitate the description of this utility model and to simplify the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] The embodiment of the present disclosure aims to solve the problem of existing slurry discharge pipelines being easily stuck, worn, and leaking. In view of this, the embodiment of the present disclosure proposes a telescopic device for a slurry discharge pipeline of a shaft boring machine, comprising a telescopic tube 1, a fixed end bracket 2, and a movable end bracket 3. One end of the telescopic tube 1 is movably connected to the fixed end bracket 2, and the other end of the telescopic tube 1 is movably connected to the movable end bracket 3. The telescopic tube 1 comprises a telescopic outer tube 11 and a telescopic inner tube 12. The telescopic inner tube 12 is slidably installed in the telescopic outer tube 11, and a seal 4 and an oil filling cup 5 are fixedly installed on the outside of the telescopic outer tube 11 at one end close to the telescopic inner tube 12.

[0029] The telescopic outer tube 11 includes a first flange 111, a support tube 112, a sealing tube 113 and a connecting piece 114. The connecting piece 114 is a pin. The outside of the first flange 111 is rotatably and sealedly connected to the fixed end bracket 2 through a detachable pin. One end of the support tube 112 is fixedly installed in the first flange 111, and the other end of the support tube 112 is fixedly connected to one end of the sealing tube 113. The telescopic inner tube 12 is slidably and sealably installed inside the sealing tube 113. The telescopic inner tube 12 is rotatably connected to the movable end bracket 3 through a detachable pin.

[0030] The telescopic inner tube 12 includes a second flange 121 and an inner tube body 122. The inner tube body 122 is slidingly and sealingly installed in the sealing tube 113. The second flange 121 is fixedly installed at the end of the inner tube body 122 away from the first flange 111. The second flange 121 is movably connected to the movable end bracket 3 through a detachable pin shaft.

[0031] It should be noted that in order to adapt to the telescopic length requirements of different shaft boring machines, the telescopic range of the telescopic device of the slurry discharge pipeline can be changed by changing the length of the telescopic outer tube 11 or the telescopic inner tube 12, thereby meeting the telescopic length requirements of different shaft boring machines.

[0032] The sealing tube 113 is symmetrically provided with a first groove, a second groove and a third groove in sequence from both ends inward. A dust ring 6 is fixedly installed in the first groove for preventing dust and cleaning the telescopic tube 1. A seal 4 is fixedly installed in the second groove for maintaining the pressure of the telescopic tube 1. An oil filling cup 5 is fixedly installed between the dust ring 6 and the seal 4 along the radial direction of the sealing tube 113.

[0033] A third groove is symmetrically provided between the sealing members 4 at both ends, and a support ring 7 for supporting the sliding and guiding of the telescopic inner tube 12 is fixedly installed in the third groove.

[0034] It should be noted that the telescopic inner tube 124 is installed in the telescopic outer tube 111 and is connected to the dust ring 66 and the sealing member 48 .

[0035] During the telescopic excavation process of the milling head, the telescopic inner tube 12 slides within the telescopic outer tube 11, and the dust ring 6 is located between the telescopic inner tube 12 and the telescopic outer tube 11, thereby preventing slurry from outside the telescopic outer tube 11 and the telescopic inner tube 12 from entering during the telescopic excavation process of the milling head. Furthermore, during the telescopic sliding process of the telescopic inner tube 12, the dust ring 66 can also clean the outer surface of the telescopic inner tube 12, thereby preventing dust from being absorbed by the surface of the telescopic inner tube 12 when the telescopic inner tube 12 is retracted into the telescopic outer tube 11. While the dust ring 6 protects the sealing of the telescopic inner tube 12 and the telescopic outer tube 11 and performs a cleaning function, the sealing member 4 can also maintain the slurry pressure in the telescopic outer tube 11 and the telescopic inner tube 12, thereby preventing leakage caused by the difference between the pressure of the slurry flowing in the telescopic outer tube 11 and the telescopic inner tube 12 and the external slurry pressure. During the sliding of the telescopic inner tube 12, the support ring 7 can provide support and guidance for the sliding of the telescopic inner tube 12, thereby enabling the telescopic inner tube 12 to slide stably. The external pipe of the oil filling cup 5 is used to deliver lubricating oil. During the sliding of the telescopic inner tube 12, the lubricating oil injected by the oil filling cup 5 improves the lubrication performance, thereby preventing the telescopic inner tube 12 from getting stuck and wearing.

[0036] The detachable connecting piece 114 and the movable end bracket 3 are both set to be clearance-fitted with each other so that the telescopic inner tube 124 and the pin shaft 2 can swing in a small range, thereby facilitating the movable end bracket 3 and the telescopic arm of the shaft boring machine to move and telescope for excavation.

[0037] The movable connection is formed by the clearance fit between the detachable connecting member 114 and the movable end bracket 3 and the rotational connection of the pin.

[0038] The fixed end bracket 2 is connected to the fixed arm of the shaft boring machine, and the movable end bracket 3 is connected to the telescopic arm of the shaft boring machine. Both the fixed end bracket 2 and the movable end bracket 3 are provided with mounting points for matching connectors 114, and the mounting points are threaded holes.

[0039] The first flange 111 and the second flange 121 are axially provided with optical holes for connecting to flanges of other slurry discharge pipes. The first flange 111 and the second flange 121 are radially provided with optical holes for connecting to the connector 114. One end of the two pins is located inside the optical holes, and the other ends of the two pins are connected to the mounting points, i.e., threaded holes, in the fixed end bracket 2 and the movable end bracket 3, respectively, via bolts. The optical holes and the pins cooperate with each other to achieve the connection between the telescopic outer tube 111 and the fixed base bracket, and the connection between the telescopic inner tube 124 and the movable base bracket.

[0040] By means of the mutual cooperation and installation of the optical holes in the first flange 111 and the second flange 121 at the ends of the telescopic outer tube 11 and the telescopic inner tube 12 and the pin shaft, and the cooperation of the detachable installation of the pin, the telescopic outer tube 111 and the fixed arm of the shaft boring machine are detachably fixed, and the telescopic inner tube 124 and the telescopic arm of the shaft boring machine are detachably fixed.

[0041] The outer surface of the inner tube is provided with an electroplated hard chrome layer that cooperates with the dust ring 6, the support ring 7 and the seal 4. The electroplated hard chrome layer can reduce the wear of the telescopic inner tube 12 and is more resistant to slurry corrosion, thereby increasing the service life of the telescopic inner tube 12 and further preventing the telescopic inner tube 12 from getting stuck and wearing.

[0042] During the telescopic excavation process of the milling head, the dust ring 6 protects the telescopic inner tube 12 and the telescopic outer tube 11 from dust, thereby preventing external dust from entering the telescopic outer tube 11 and the telescopic inner tube 12 and causing contamination. The telescopic outer tube 11 and the telescopic inner tube 12 are filled with slurry, and the seal 4 maintains the pressure of the slurry in the telescopic outer tube 11 and the telescopic inner tube 12, thereby preventing the slurry from leaking due to the difference in internal and external pressure. As the milling head telescopic excavation is extended and extended, the telescopic inner tube 12 slides within the telescopic outer tube 11, thereby adapting to the telescopic excavation stroke of the milling head. During the sliding process of the telescopic inner tube 12, the support ring 7 supports and guides the telescopic inner tube 12. Simultaneously, during the sliding process of the telescopic inner tube 12, the oiling cup 5 is filled with lubricating oil and coated with a hard chrome layer to prevent the telescopic inner tube 12 from getting stuck and wearing.

[0043] After the milling head is telescopically extended and excavated, the telescopic inner tube 12 slides and retracts into the telescopic outer tube 11. During the process of the telescopic inner tube 12 sliding inward and retracting, the dust ring 6 prevents dust from entering the outside of the telescopic inner tube 12 and the telescopic outer tube 11. At the same time, the dust ring 6 can also clean the outer surface of the telescopic inner tube 12 to ensure that the surface of the telescopic inner tube 12 remains clean after retraction.

[0044] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A telescopic device for a slurry discharge pipeline of a shaft boring machine, comprising a telescopic tube (1), a fixed end bracket (2) and a movable end bracket (3), wherein one end of the telescopic tube (1) is movably connected to the fixed end bracket (2), and the other end of the telescopic tube (1) is movably connected to the movable end bracket (3), characterized in that: The telescopic tube (1) comprises a telescopic outer tube (11) and a telescopic inner tube (12); the telescopic inner tube (12) is slidably mounted in the telescopic outer tube (11); and a sealing member (4) and an oil filling cup (5) are fixedly mounted on the outer side of one end of the telescopic outer tube (11) close to the telescopic inner tube (12).

2. The telescopic device for a slurry discharge pipeline of a shaft boring machine according to claim 1, characterized in that: The telescopic outer tube (11) comprises a first flange (111), a support tube (112) and a sealing tube (113); the first flange (111) is externally movably connected to the fixed-end bracket (2) via a detachable connecting piece (114); one end of the support tube (112) is fixedly mounted in the first flange (111); the other end of the support tube (112) is fixedly connected to one end of the sealing tube (113); the telescopic inner tube (12) is slidably mounted in the sealing tube (113); and the telescopic inner tube (12) is movably connected to the movable-end bracket (3) via the detachable connecting piece (114).

3. The telescopic device for a slurry discharge pipeline of a shaft boring machine according to claim 2, characterized in that: The telescopic inner tube (12) comprises a second flange (121) and an inner tube body (122); the inner tube body (122) is slidably mounted in the sealing tube (113); the second flange (121) is fixedly mounted on the end of the inner tube body (122) away from the first flange (111); the second flange (121) is movably connected to the movable end bracket (3) via a detachable connecting piece (114).

4. The telescopic device for a slurry discharge pipeline of a shaft boring machine according to claim 3, characterized in that: The sealing tube (113) is symmetrically provided with a first groove, a second groove, and a third groove in sequence from both ends inward, a dustproof ring (6) for achieving dustproofing inside and outside the telescopic tube (1) is fixedly installed in the first groove, a sealing member (4) for achieving pressure maintenance inside and outside the telescopic tube (1) is fixedly installed in the second groove, and an oil filling cup (5) for improving lubrication is fixedly installed between the dustproof ring (6) and the sealing member (4) along the radial direction of the sealing tube (113).

5. The telescopic device for a slurry discharge pipeline of a shaft boring machine according to claim 4, characterized in that: A third groove is symmetrically provided between adjacent sealing members (4), and a support ring (7) for supporting and guiding the telescopic inner tube (12) is fixedly installed in the third groove.

6. The telescopic device for a slurry discharge pipeline of a shaft boring machine according to claim 5, characterized in that: The detachable connecting piece (114) and the movable end bracket (3) are arranged to be clearance-fitted with each other for displacement.

7. The telescopic device for a slurry discharge pipeline of a shaft boring machine according to claim 6, characterized in that: The first flange (111) and the second flange (121) are axially provided with light holes for connecting to other slurry discharge pipeline flanges, and the first flange (111) and the second flange (121) are radially provided with light holes for connecting to the connecting piece (114).

8. The telescopic device for a slurry discharge pipeline of a shaft boring machine according to claim 7, characterized in that: The outer surface of the inner tube is provided with an electroplated hard chromium layer that matches the dust ring (6), the support ring (7) and the sealing member (4).

9. The telescopic device for a slurry discharge pipeline of a shaft boring machine according to claim 8, characterized in that: The fixed end bracket (2) is connected to the fixed arm of the shaft boring machine, and the movable end bracket (3) is connected to the telescopic arm of the shaft boring machine. Both the fixed end bracket (2) and the movable end bracket (3) are provided with mounting points for matching connectors (114).

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