A new bentonite mixing system for full-face tunnel boring machines

Abstract

The present invention provides a novel bentonite mixing system for a full-section tunnel boring machine, comprising a bentonite pump, a bentonite box, a first mixing pipe, a second mixing pipe, a water inlet pipe, an air inlet pipe and a spray pipe, wherein the first mixing pipe and the second mixing pipe are arranged in the bentonite box, the bentonite pump is connected to the first mixing pipe and the second mixing pipe through a pipeline, the first mixing pipe and the second mixing pipe are both provided with a one-way valve at a position extending out of the bentonite box, the spray pipe is installed above the bentonite box, the water inlet pipe is connected to the spray pipe, the first mixing pipe and the second mixing pipe, the upper end of the bentonite box is connected to an exhaust pipe, the bottom end of the bentonite box is connected to a discharge pipe, and the first mixing pipe and the second mixing pipe are provided with a plurality of pipe joints. The present invention makes bentonite mixing for a full-section tunnel boring machine more economical and effective, can completely replace the original mechanical mixing method, reduce costs, save resources, save manpower, and improve mixing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel boring machines, and in particular relates to a novel bentonite mixing system for a full-section tunnel boring machine. Background Art

[0002] At present, bentonite in full-section tunnel boring machines is mechanically mixed, which results in uneven mixing and prone to dead corners. Manual control of mixing is required, and the mixing effect is not good for large-capacity bentonite boxes. Summary of the invention

[0003] In view of this, the present invention aims to provide a novel bentonite mixing system for a full-face tunnel boring machine, which can solve the problems existing in the prior art.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A new bentonite mixing system for a full-face tunnel boring machine includes a bentonite pump, a bentonite box, a first mixing pipe, a second mixing pipe, a water inlet pipe, an air inlet pipe and a spray pipe. The first mixing pipe and the second mixing pipe are arranged in the bentonite box. The bentonite pump is connected to the first mixing pipe and the second mixing pipe through a pipeline. The starting end and the terminal end of the first mixing pipe extend out of the two ends of the bentonite box respectively. The starting end of the first mixing pipe and the starting end of the second mixing pipe are both provided with a one-way valve at the position extending out of the bentonite box. A first control valve is provided between the two one-way valves and the bentonite pump. The air inlet pipe is connected to the first mixing pipe and the second mixing pipe. The position between the pipes, a second control valve is provided on the air inlet pipe, a spray pipe is installed above the bentonite box, a plurality of spray branch pipes extend from the bottom of the spray pipe, the spray branch pipes are inserted into the bentonite box, the water inlet pipe is connected with the spray pipe, the first stirring pipe and the second stirring pipe, a third control valve is provided on the water inlet pipe, a fourth control valve is provided on the spray pipe at the connection with the water inlet pipe, a fifth control valve is provided between the water inlet pipe and the first stirring pipe, an exhaust pipe is connected to the upper end of the bentonite box, a discharge pipe is connected to the bottom end of the bentonite box, a sixth control valve is provided on the discharge pipe, and a plurality of pipe joints are provided on the first stirring pipe and the second stirring pipe.

[0006] Furthermore, the installation angles of the pipe joint of the first stirring pipe and the pipe joint of the second stirring pipe are opposite.

[0007] Furthermore, the first stirring tube and the second stirring tube are parallel to each other.

[0008] Furthermore, the tail end of the exhaust pipe is bent toward the bentonite box, and a seventh control valve is provided on the exhaust pipe.

[0009] Furthermore, the first stirring tube is arranged above the second stirring tube, and the upper end of the first stirring tube is vertically fixedly connected to a plurality of stirring branch tubes, and each stirring branch tube is provided with a plurality of nozzles.

[0010] Furthermore, the end of each spray branch pipe is detachably connected to a spray head.

[0011] Furthermore, the terminal ends of the first stirring tube and the terminal ends of the second stirring tube are both detachably fixed with plugs.

[0012] Furthermore, a viewing window is provided on one side of the bentonite box for observing the internal situation of the bentonite box.

[0013] Compared with the prior art, the new bentonite mixing system for full-section tunnel boring machines described in the present invention has the following advantages: it makes the bentonite mixing of full-section tunnel boring machines more economical and effective, can completely replace the original mechanical mixing method, reduce costs, save resources, save manpower, and improve mixing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0017] Figure 3 for Figure 1 A magnified schematic diagram of part B;

[0018] Description of reference numerals:

[0019] 1- bentonite pump; 2- bentonite box; 3- first control valve; 4- one-way valve; 5- first stirring pipe; 6- pipe joint; 7- second stirring pipe; 8- water inlet pipe; 9- third control valve; 10- fourth control valve; 11- spray pipe; 12- stirring branch pipe; 13- fifth control valve; 14- air inlet pipe; 15- second control valve; 16- exhaust pipe; 17- seventh control valve; 18- sixth control valve; 19- discharge pipe; 20- spray branch pipe; 21- nozzle; 22- plugging; 23- visual window; 24- bentonite injection pipe; 25- eighth control valve; 26- drain pipe; 27- bentonite. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, 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 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0024] like Figure 1-3 As shown, a new type of bentonite mixing system for a full-section tunnel boring machine includes a bentonite pump 1, a bentonite box 2, a first mixing pipe 5, a second mixing pipe 7, a water inlet pipe 8, an air inlet pipe 14 and a spray pipe 11. The first mixing pipe 5 and the second mixing pipe 7 are arranged in the bentonite box 2, and the bentonite pump 1 is connected to the first mixing pipe 5 and the second mixing pipe 7 through a pipeline. The starting end and the terminal end of the first mixing pipe 5 extend out of the two ends of the bentonite box 2 respectively. The starting end of the first mixing pipe 5 and the starting end of the second mixing pipe 7 are both provided with a one-way valve 4 at the position extending out of the bentonite box 2. The one-way valve 4 is used to prevent the bentonite in the bentonite box 2 from flowing back into the bentonite injection pipe 24 through the mixing pipe.

[0025] A first control valve 3 is provided between the two one-way valves 4 and the bentonite pump 1, an air inlet pipe 8 is connected to a position between the first stirring pipe 5 and the second stirring pipe 7, a second control valve 15 is provided on the air inlet pipe 14, a spray pipe 11 is installed above the bentonite box 2, a plurality of spray branch pipes 20 extend from the bottom of the spray pipe 11, and the spray branch pipes 20 are inserted into the bentonite box 2, a water inlet pipe 8 is connected to the spray pipe 11, the first stirring pipe 5 and the second stirring pipe 7, a third control valve 9 is provided on the water inlet pipe 8, a fourth control valve 10 is provided on the spray pipe 11 at the connection with the water inlet pipe 8, a fifth control valve 13 is provided between the water inlet pipe 8 and the first stirring pipe 5, an exhaust pipe 16 is connected to the upper end of the bentonite box 2, a discharge pipe 19 is connected to the bottom end of the bentonite box 2, a sixth control valve 18 is provided on the discharge pipe 19, and a plurality of pipe joints 6 are provided on the first stirring pipe 5 and the second stirring pipe 7.

[0026] The installation angles of the pipe joint 6 of the first stirring pipe 5 and the pipe joint 6 of the second stirring pipe 7 are opposite, so that a turbulent flow can be formed in the bentonite box 2, the stirring effect is improved, and there is no dead angle in the stirring, and the whole bentonite box 2 can be stirred.

[0027] The first stirring tube 5 and the second stirring tube 7 are parallel to each other.

[0028] The tail end of the exhaust pipe 16 is bent toward the bentonite box 2, and a seventh control valve 17 is provided on the exhaust pipe 16. In order to prevent the bentonite from splashing outwards during the mixing process.

[0029] The first stirring tube 5 is disposed above the second stirring tube 7 . The upper end of the first stirring tube 5 is vertically fixedly connected to a plurality of stirring branch tubes 12 . Each stirring branch tube 12 is provided with a plurality of nozzles 21 .

[0030] The end of each spray branch pipe 20 is detachably connected to a spray head.

[0031] A plug 22 may be detachably fixed to the terminal of the first stirring tube 5 and the terminal of the second stirring tube 7 .

[0032] A viewing window 23 is provided on one side of the bentonite box 2 for observing the interior of the bentonite box 2 .

[0033] The bentonite injection pipe 24 is provided with an eighth control valve 25 .

[0034] When in use, under normal conditions, the bentonite pump 1, the sixth control valve 18 and the eighth control valve 25 are turned on to start pumping bentonite into the cutter head soil bin (through the bentonite injection pipe 24). At this time, the bentonite is not the bentonite in the bentonite box, but the bentonite in the attached Figure 1The original unstirred bentonite at the position of the middle label number 27. When the bentonite in the bentonite box 2 needs to be stirred, the eighth control valve 25 is closed, and the first control valve 3 is opened. The bentonite coming out of the bentonite pump 1 will enter the one-way valve 4 through the first control valve 3, and then enter the first stirring pipe 5 and the second stirring pipe 7, and be sprayed out from the pipe joint 6. If the liquid level is high, it will also enter the stirring branch pipe 12 and be sprayed out from the nozzle 21. If the bentonite box 2 is increased according to the needs of the tunneling machine, the number of stirring pipes can be increased to meet the needs of the system. When the bentonite that needs to be stirred is all driven into the bentonite box, the first control valve is closed, the second control valve 15 is opened, and the first stirring pipe 5 and the second stirring pipe 7 are ventilated through the air inlet pipe 14 to stir the bentonite. Open the seventh control valve, and the gas in the bentonite box 2 will be discharged through the exhaust pipe 16. After stirring, the second control valve 15 is closed, the sixth control valve 18 and the eighth control valve 25 are opened, and the bentonite pump 1 pumps the bentonite into the bentonite injection pipe 24 .

[0035] When the bentonite box 2 needs to be cleaned, the third control valve 9, the fourth control valve 10, and the fifth control valve 13 are opened, and the first control valve 3, the second control valve 15, and the sixth control valve 18 are closed, and water flows from the water inlet pipe 8 through the spray pipe 11, the first stirring pipe 5, and the second stirring pipe 7, and finally flows into the bentonite box. A control valve is provided on the drain pipe 26, and when drainage is required, the control valve is opened to discharge the sewage after the spray.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of bentonite mixing system for full-face tunnel boring machine, characterized by: The invention comprises a bentonite pump (1), a bentonite box (2), a first stirring pipe (5), a second stirring pipe (7), a water inlet pipe (8), an air inlet pipe (14) and a spray pipe (11); the first stirring pipe (5) and the second stirring pipe (7) are arranged in the bentonite box (2); the bentonite pump (1) is connected to the first stirring pipe (5) and the second stirring pipe (7) through a pipeline; the starting end and the terminal end of the first stirring pipe (5) extend out of the two ends of the bentonite box (2); the starting end of the first stirring pipe (5) and the starting end of the second stirring pipe (7) are both provided with a one-way valve (4) at the position extending out of the bentonite box (2); a first control valve (3) is provided between the two one-way valves (4) and the bentonite pump (1); the air inlet pipe (14) is connected to the position between the first stirring pipe (5) and the second stirring pipe (7); the air inlet pipe (14) is provided with a second control valve (3); A valve (15) is provided, the spray pipe (11) is installed above the bentonite box (2), a plurality of spray branch pipes (20) extend from the bottom of the spray pipe (11), the spray branch pipes (20) are inserted into the bentonite box (2), the water inlet pipe (8) is connected to the spray pipe (11), the first stirring pipe (5) and the second stirring pipe (7), a third control valve (9) is provided on the water inlet pipe (8), a fourth control valve (10) is provided on the spray pipe (11) at the connection with the water inlet pipe (8), a fifth control valve (13) is provided between the water inlet pipe (8) and the first stirring pipe (5), the upper end of the bentonite box (2) is connected to an exhaust pipe (16), the lower end of the bentonite box (2) is connected to a discharge pipe (19), the discharge pipe (19) is provided with a sixth control valve (18), and a plurality of pipe joints (6) are provided on the first stirring pipe (5) and the second stirring pipe (7); The pipe joint (6) of the first stirring pipe (5) and the pipe joint (6) of the second stirring pipe (7) are installed at opposite angles; An eighth control valve is provided on the bentonite injection pipe. When the bentonite in the bentonite box needs to be stirred, the eighth control valve is closed and the first control valve is opened. The bentonite pumped out of the bentonite pump will enter the one-way valve through the first control valve, and then enter the first stirring pipe and the second stirring pipe, and be sprayed out from the pipe joint; when the bentonite that needs to be stirred is pumped into the bentonite box, the first control valve is closed, the second control valve is opened, and air is ventilated into the first stirring pipe and the second stirring pipe through the air inlet pipe to stir the bentonite; after stirring, the second control valve is closed, the sixth control valve and the eighth control valve are opened, and the bentonite pump pumps the bentonite into the bentonite injection pipe.

2. The new bentonite mixing system for full-face tunnel boring machine according to claim 1 is characterized in that: The first stirring tube (5) and the second stirring tube (7) are parallel to each other.

3. The new bentonite mixing system for full-face tunnel boring machine according to claim 1 is characterized in that: The tail end of the exhaust pipe (16) is bent toward the bentonite box (2), and a seventh control valve (17) is provided on the exhaust pipe (16).

4. The new bentonite mixing system for full-face tunnel boring machine according to claim 1 is characterized in that: The first stirring tube (5) is arranged above the second stirring tube (7), and the upper end of the first stirring tube (5) is vertically fixedly connected to a plurality of stirring branch tubes (12), and each stirring branch tube (12) is provided with a plurality of nozzles (21).

5. The new bentonite mixing system for full-face tunnel boring machine according to claim 1 is characterized in that: The end of each spray branch pipe (20) is detachably connected with a spray head.

6. The new bentonite mixing system for full-face tunnel boring machine according to claim 1 is characterized in that: The terminal end of the first stirring tube (5) and the terminal end of the second stirring tube (7) are both detachably fixed with a plug (22).

7. The new bentonite mixing system for full-face tunnel boring machine according to claim 1 is characterized by: A viewing window (23) for observing the interior of the bentonite box (2) is provided on one side of the bentonite box (2).

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