Telescopic pipe device for shield machine

Abstract

Compared with the prior art, the telescopic pipe device for a shield machine disclosed in the present application comprises: a telescopic inner sleeve; a telescopic outer sleeve; the shrink wear-resistant inner sleeve is slidably inserted in the telescopic outer sleeve; a carbon fiber oil-immersed packing sealing group arranged between the telescopic inner sleeve and the telescopic outer sleeve; a first oil nozzle and a second oil nozzle installed on the telescopic outer sleeve for injecting grease into the carbon fiber oil-immersed packing sealing group. Compared with the prior art, the telescopic pipe device for a shield machine disclosed in the present application can realize the configuration of telescopic pipes for shield mud and water circulation, and increase the reliability of mud and water balance shield construction operations.

Description

Technical Field

[0001] The present application relates to the technical field of shield machines, and more specifically, to a telescopic pipe device for a shield machine. Background Art

[0002] The shield machine is the main equipment used in the shield construction process of subways, tunnels and other projects, especially the slurry shield machine, which has a wide geological adaptability and is increasingly used. One of the most important systems for the slurry shield machine to transport slag is the slurry circulation system. When the shield turns or adjusts its direction, the main slurry discharge loop of the circulation needs to have a certain compensation in the tunnel axis and radial direction. Especially in some moving areas, the use of radial-axial compensation is essential, which can alleviate the damage to the circulation loop caused by equipment turning or water hammer impact to a certain extent, ensure normal excavation, and improve construction efficiency.

[0003] At present, in the existing technology, the mud and water circulation loop compensation in the shield body of the slurry balance shield machine is mostly compensated by mud hoses. During operation, the mud hoses cannot be completely fixed and are easily damaged when impacted by the circulating medium and rubbed against the structural parts. Or defects such as leakage and damage to accessory pipelines often occur, and the reliability is poor.

[0004] Therefore, how to provide a telescopic pipe device for a shield machine, which can realize the telescopic pipe configuration for shield mud and water circulation and increase the reliability of slurry balance shield construction, has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a telescopic pipe device for a shield machine, which can realize the telescopic pipe configuration for shield mud and water circulation, and help to increase the reliability of mud balance shield construction operations.

[0006] The technical solutions provided by this application are as follows:

[0007] The present application provides a telescopic pipe device for a shield machine, comprising: a telescopic inner sleeve;

[0008] A telescopic outer sleeve; the shrinkage wear-resistant inner sleeve is slidably inserted into the telescopic outer sleeve; a carbon fiber oil-immersed packing sealing group is arranged between the telescopic inner sleeve and the telescopic outer sleeve; a first oil nozzle and a second oil nozzle are installed on the telescopic outer sleeve and used for injecting grease into the carbon fiber oil-immersed packing sealing group.

[0009] Furthermore, in a preferred embodiment of the utility model, the carbon fiber oil-immersed packing sealing group includes: carbon fiber oil-immersed packing; a retaining ring matched with the carbon fiber oil-immersed packing, and the carbon fiber oil-immersed packing and the retaining ring are spaced apart.

[0010] Furthermore, in a preferred embodiment of the present invention, the number of the carbon fiber oil-immersed packing sealing groups is at least 3 groups.

[0011] Furthermore, in a preferred embodiment of the present invention, each of the carbon fiber oil-immersed packing sealing groups has at least two rows of carbon fiber oil-immersed packings.

[0012] Furthermore, in a preferred embodiment of the utility model, the carbon fiber oil-immersed packing sealing group is arranged between the telescopic inner sleeve and the telescopic outer sleeve, specifically: the carbon fiber oil-immersed packing sealing group is pressed into the ring gap formed by the wear-resistant inner sleeve and the telescopic outer sleeve through the fastening bolt assembly and the adjustable pre-tightening flange.

[0013] Furthermore, in a preferred embodiment of the present invention, the injection pressures of the first oil nozzle and the second oil nozzle form a pressure difference, and the pressure difference is not less than 1 bar.

[0014] Furthermore, in a preferred embodiment of the utility model, it also includes: a pre-pressure relief device is installed in the radial direction of the telescopic sleeve, and a peak active pressure relief method is adopted to protect the mud circulation circuit from water hammer impact to a certain extent.

[0015] Furthermore, in a preferred embodiment of the utility model, it also includes: a flexible connection structure with radial compensation arranged in the axial direction of the telescopic sleeve, which can achieve the swing of the radial compensation circulation pipeline when the shield turns to a certain extent.

[0016] Furthermore, in a preferred embodiment of the present invention, the injection pressure of the first oil nozzle is higher than the injection pressure of the second oil nozzle, and the injection pressure of the second oil nozzle is higher than the pressure of the conveying medium.

[0017] Furthermore, in a preferred embodiment of the utility model, it further comprises: a flushing water interface provided on the telescopic outer sleeve, wherein the flushing water interface is used for flushing the annular gap between the wear-resistant inner sleeve and the telescopic outer sleeve on the conveying medium side.

[0018] The utility model provides a telescopic pipe device for a shield machine, which, compared with the prior art, comprises: a telescopic inner sleeve; a telescopic outer sleeve; the shrink wear-resistant inner sleeve is slidably inserted in the telescopic outer sleeve; a carbon fiber oil-immersed packing sealing group arranged between the telescopic inner sleeve and the telescopic outer sleeve; a first oil nozzle and a second oil nozzle installed on the telescopic outer sleeve for injecting grease into the carbon fiber oil-immersed packing sealing group. Compared with the prior art, the telescopic pipe device for a shield machine involved in the present application can realize the configuration of telescopic pipes for shield mud and water circulation, and increase the reliability of mud and water balance shield construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of the telescopic tube device for a shield machine provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of this application.

[0022] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0026] like Figure 1 As shown, the telescopic tube device for a shield machine provided in the embodiment of the present application includes: a telescopic inner sleeve 1; a telescopic outer sleeve 4; the telescopic wear-resistant inner sleeve 1 is slidably inserted into the telescopic outer sleeve 4; a carbon fiber oil-immersed packing sealing group is arranged between the telescopic inner sleeve 1 and the telescopic outer sleeve 4; a first oil nozzle 8 and a second oil nozzle 9 installed on the telescopic outer sleeve 4 for injecting grease into the carbon fiber oil-immersed packing sealing group.

[0027] The utility model provides a telescopic pipe device for a shield machine, specifically comprising: a telescopic inner sleeve 1;

[0028] The telescopic outer sleeve 4; the shrink wear-resistant inner sleeve 1 is slidably inserted in the telescopic outer sleeve 4; the carbon fiber oil-immersed packing sealing group is arranged between the telescopic inner sleeve 1 and the telescopic outer sleeve 4; the first oil nozzle 8 and the second oil nozzle 9 installed on the telescopic outer sleeve 4 are used to inject grease into the carbon fiber oil-immersed packing sealing group. Compared with the prior art, the telescopic pipe device for shield machine involved in the present application can realize the configuration of telescopic pipe for shield mud and water circulation, and increase the reliability of mud and water balance shield construction.

[0029] The technical solution of the utility model is described in detail below in conjunction with specific embodiments:

[0030] Specifically, in a specific embodiment of the utility model, the carbon fiber oil-immersed packing sealing group includes: a carbon fiber oil-immersed packing 7; a retaining ring 6 matched with the carbon fiber oil-immersed packing, and the carbon fiber oil-immersed packing 7 and the retaining ring 6 are arranged at intervals.

[0031] Specifically, in a specific embodiment of the present utility model, the number of the carbon fiber oil-immersed packing sealing groups is at least 3 groups.

[0032] Specifically, in a specific embodiment of the present utility model, each of the carbon fiber oil-immersed packing sealing groups has at least two rows of carbon fiber oil-immersed packings 7 .

[0033] Specifically, in a specific embodiment of the utility model, the carbon fiber oil-immersed packing sealing group is arranged between the telescopic inner sleeve 1 and the telescopic outer sleeve 4. Specifically, the carbon fiber oil-immersed packing sealing group is pressed into the annular gap formed by the wear-resistant inner sleeve 1 and the telescopic outer sleeve 4 through the fastening bolt assembly 3 and the adjustable pre-tightening flange 2.

[0034] Specifically, in a specific embodiment of the present invention, the injection pressures of the first oil nozzle 8 and the second oil nozzle 9 form a pressure difference, and the pressure difference is not less than 1 BAR.

[0035] Specifically, in a specific embodiment of the utility model, it also includes: a pre-pressure relief device 5 is installed in the radial direction of the telescopic sleeve 4, that is, on the non-packing sealing side, and adopts a peak active pressure relief method to protect the mud circulation circuit from water hammer impact to a certain extent.

[0036] Specifically, in a specific embodiment of the utility model, it also includes: a flexible connection structure 11 with radial compensation is arranged in the axial direction of the telescopic sleeve 4, that is, on the non-packing sealing side, which can achieve the swing of the radial compensation circulation pipeline when the shield turns to a certain extent.

[0037] Specifically, in a specific embodiment of the present utility model, the injection pressure of the first oil nozzle 8 is higher than the injection pressure of the second oil nozzle 9, and the injection pressure of the second oil nozzle 9 is higher than the pressure of the conveying medium.

[0038] Specifically, in a specific embodiment of the utility model, it also includes: a flushing water interface 10 provided on the telescopic outer sleeve, and the flushing water interface 10 is used to flush the annular gap between the wear-resistant inner sleeve 1 and the telescopic outer sleeve 4 on the side close to the conveying medium.

[0039] To be more specific, the shield machine is the main equipment used in the shield construction process of subways, tunnels and other projects, especially the slurry shield machine, which has a wide geological adaptability and is increasingly used. One of the most important systems for the slurry shield machine to transport slag is the slurry circulation system. When the shield turns or adjusts its direction, the main slurry discharge loop of the circulation needs to have a certain compensation in the tunnel axis and radial direction. Especially in some moving areas, the use of radial-axial compensation is essential, which can alleviate the damage to the circulation loop caused by equipment turning or water hammer impact to a certain extent, ensure normal excavation, and improve construction efficiency.

[0040] At present, in the existing technology, there are generally two ways to compensate for the mud-water circulation loop in the shield of a slurry shield machine. The first is to use mud hose compensation. During operation, the mud hose cannot be completely fixed and is easily damaged by friction with the structural parts when impacted by the circulating medium. The second is to use a combination of telescopic sleeves and expansion joints, which can meet radial and axial compensation, but often have defects such as leakage and accessory pipeline damage, and there are corresponding construction risks to a certain extent. In actual use, it is often replaced, resulting in a certain cost of equipment components.

[0041] The telescopic pipe device for sealing control and compensating unloading for shield involved in the implementation of the utility model, compared with the existing technology, adopts high-performance carbon fiber oil-immersed packing and active step pressure control; adopts peak active pressure relief method to protect the mud circulation circuit to a certain extent from water hammer impact; adopts a front active water flushing method and a shock-absorbing throat clamp integrated design with large radial compensation. Through the above-mentioned technical means, improvements are made to realize the configuration of telescopic pipes for shield mud and water circulation, thereby increasing the reliability of mud balance shield construction.

[0042] The utility model relates to a telescopic tube device for sealing control and compensating unloading for a shield, comprising: a pre-pressure relief device 5, a telescopic inner sleeve 1, a telescopic outer sleeve 4, a flexible connection with radial compensation 11, an adjustable pre-tightening flange 2, a fastening bolt assembly 3, a retaining ring 6, a carbon fiber oil-immersed packing 7, a first oil nozzle 8, a second oil nozzle 9, and a flushing water interface 10, comprising: a telescopic inner sleeve 1 and a telescopic outer sleeve 4, wherein the shrink wear-resistant inner sleeve 1 is inserted into the telescopic outer sleeve 4 for sliding, and an annular carbon fiber oil-immersed Packing 7; wherein the carbon fiber oil-immersed packing 7 absorbs grease to achieve effective sealing connection between the wear-resistant inner sleeve 1 and the telescopic outer sleeve 4 during static and sliding conditions; the carbon fiber oil-immersed packing 7 adopts an annular structure, which is combined with the retaining ring 6 to form an effective high-performance carbon fiber oil-immersed packing sealing group, and the group is not less than 3 groups; wherein each group of seals has not less than 2 or more carbon fiber oil-immersed packings 7; the carbon fiber oil-immersed packing 7 is combined with the retaining ring 6 to form an effective high-performance carbon fiber oil-immersed packing sealing group, which is tightened by the bolt assembly 3 and the adjustable preload flange 2 The above-mentioned sealing group is pressed into the effective ring formed by the wear-resistant inner sleeve 1 and the telescopic outer sleeve 4; the carbon fiber oil-immersed packing 7 and the retaining ring 6 are combined to form an effective high-performance carbon fiber oil-immersed packing seal, and grease is injected respectively by the first oil nozzle 8 and the second oil nozzle 9. The injection pressure of the first oil nozzle 8 and the second oil nozzle 9 forms a pressure difference, and the pressure difference is recommended to be not less than 1BAR, wherein the injection pressure of the first oil nozzle 8 is higher than the injection pressure of the second oil nozzle 9, and the injection pressure of the second oil nozzle 9 is slightly higher than the pressure of the conveying medium, which is adjusted according to actual conditions; the annular gap between the wear-resistant inner sleeve 1 and the telescopic outer sleeve 4 is close to the medium side, and a flushing method of a flushing water interface 10 is adopted, and the flushing pressure is slightly higher than the pressure of the conveying medium, thereby better protecting the packing seal; the pre-pressure relief device 5 is installed in the radial direction of the non-packing seal side of the telescopic outer sleeve 4, and the peak active pressure relief method is adopted to protect the mud circulation circuit to a certain extent by water hammer impact; the flexible connection 11 with radial compensation is installed in the axial direction of the non-packing seal side of the telescopic outer sleeve 4, which can realize the swing of the radial compensation circulation pipeline when the shield turns to a certain extent.

[0043] As described above, the telescopic pipe device for a shield machine provided by the embodiment of the utility model can overcome the above-mentioned existing technical problems through the organic combination of the above-mentioned technical means, realize the configuration of telescopic pipes for shield mud and water circulation, increase the reliability of mud balance shield construction, and have significant technical effects.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A telescopic pipe device for a shield machine, characterized in that: include: A telescopic inner sleeve (1) and a telescopic outer sleeve (4); The telescopic inner sleeve (1) is slidably inserted into the telescopic outer sleeve (4); A carbon fiber oil-immersed packing sealing group provided between the telescopic inner sleeve (1) and the telescopic outer sleeve (4); A first oil nozzle (8) and a second oil nozzle (9) mounted on the telescopic sleeve (4) and used for injecting grease into the carbon fiber oil-immersed packing sealing group.

2. The telescopic tube device for a shield machine according to claim 1, characterized in that: The carbon fiber oil-immersed packing sealing group comprises: a carbon fiber oil-immersed packing (7); and a retaining ring (6) matched with the carbon fiber oil-immersed packing, wherein the carbon fiber oil-immersed packing (7) and the retaining ring (6) are arranged at intervals.

3. The telescopic tube device for a shield machine according to claim 2, characterized in that: The number of the carbon fiber oil-immersed packing seal groups is at least 3.

4. The telescopic tube device for a shield machine according to claim 1, characterized in that: Each of the carbon fiber oil-immersed packing sealing groups has at least two rows of carbon fiber oil-immersed packings (7).

5. The telescopic tube device for a shield machine according to claim 1, characterized in that: The carbon fiber oil-immersed packing sealing group is arranged between the telescopic inner sleeve (1) and the telescopic outer sleeve (4), specifically: the carbon fiber oil-immersed packing sealing group is pressed into the annular gap formed by the telescopic inner sleeve (1) and the telescopic outer sleeve (4) through the fastening bolt assembly (3) and the adjustable pre-tightening flange (2).

6. The telescopic tube device for a shield machine according to claim 1, characterized in that: The injection pressures of the first oil nozzle (8) and the second oil nozzle (9) form a pressure difference, and the pressure difference is not less than 1 bar.

7. The telescopic tube device for a shield machine according to claim 1, characterized in that: Also includes: A pre-pressure relief device (5) is installed in the radial direction of the telescopic outer sleeve (4).

8. The telescopic tube device for a shield machine according to claim 1, characterized in that: Also includes: A flexible connection structure (11) with radial compensation is provided in the axial direction of the telescopic sleeve (4).

9. The telescopic tube device for a shield machine according to claim 6, characterized in that: The injection pressure of the first oil nozzle (8) is higher than the injection pressure of the second oil nozzle (9), and the injection pressure of the second oil nozzle (9) is higher than the pressure of the conveying medium.

10. The telescopic tube device for a shield machine according to any one of claims 1 to 9, characterized in that: Also includes: A flushing water interface (10) is provided on the telescopic outer sleeve, and the flushing water interface (10) is used to flush the annular gap between the telescopic inner sleeve (1) and the telescopic outer sleeve (4) on the side close to the conveying medium.

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