Densitometer mounting structure for shield tunneling machine muddy water circulation and shield tunneling machine muddy water circulation system

Abstract

Compared with the prior art, the densimeter mounting structure for muddy water circulation of the shield tunneling machine comprises a main pipe connecting section connected with a slurry inlet and outlet pipe of the muddy water circulation; the special valve is connected with the main pipe connecting section; the replaceable grating connecting flange is connected with the special valve; the replaceable grating is mounted on the inner side of the replaceable grating connecting flange; the cleanable body is connected with the replaceable grating connecting flange; the automatic discharge valve is arranged at the lower part of the cleanable body; compared with the prior art, the densimeter mounting structure for muddy water circulation of the shield tunneling machine can overcome the problem that slurry particles are not washed in the prior art, the lower flange of the cleanable body is connected with the automatic drain valve, internal washing of the cleanable body is achieved, the structure is simple, the structure is convenient, and the practicability is high. In addition, the utility model further provides a muddy water circulation system of the shield tunneling machine, and the muddy water circulation system of the shield tunneling machine has the same beneficial effects as the muddy water circulation system of the shield tunneling machine.

Description

Technical Field

[0001] The present application relates to the technical field of shield machines, and more specifically, to a density meter installation structure for mud and water circulation of a shield machine. In addition, the present application also provides a mud and water circulation system for a shield machine, which also has the above-mentioned beneficial effects. 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 balance shield machine, which has a wide geological adaptability and is increasingly used. During normal excavation, the amount of mud in and out and the amount of excavated soil are generally monitored to ensure that the excavation and transportation are at a normal level. Among them, the more important parameter is the measurement of the specific gravity of the slag, that is, the densitometer. By measuring the density of the incoming slurry and the density of the outgoing slurry, the density of the incoming and outgoing slurry is measured and calculated to indirectly determine whether there is over-excavation or stagnation; if over-excavation or stagnation occurs, it will cause the stability of the excavation surface stratum, and then affect the major risks such as ground settlement or building damage.

[0003] In the prior art, the density meters used in the mud circulation system of the slurry balance shield machine are generally divided into gamma-ray density meters or differential pressure density meters, both of which are high-cost products; considering that the gamma-ray density meter has radioactive hazards, the approval process is relatively difficult and cumbersome, so the differential pressure density meter is used in more cases, generally with a 2-inch or 3-inch flange installation; the shield excavation stratum has more or less hard rocks or boulders, and the slurry discharged from the mud and water circulation contains hard rock blocks of irregular particle sizes. At present, the differential pressure density meter does not properly process and flush the mud particles during use, and there are technical problems such as frequent damage to the measuring part of the density meter and missing measurement data.

[0004] Therefore, how to provide a shield machine mud water circulation density meter installation structure, which can overcome the existing technical problems, avoid the density meter measurement part easy to damage and the loss of measurement data, has become a technical problem to be solved urgently by technical personnel in this field. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the present application provides a shield machine mud water circulation density meter installation structure, which can overcome the existing technical problems, avoid the easy damage of the density meter measuring part and the loss of measurement data. In addition, the present application also provides a shield machine mud water circulation system, which also has the above-mentioned beneficial effects.

[0006] The utility model provides a shield machine mud and water circulation density meter installation structure, comprising: a main pipe connection section connected to the mud and water circulation inlet and outlet slurry pipes; a special valve connected to the main pipe connection section; a replaceable grille connection flange connected to the special valve; a replaceable grille installed on the inner side of the replaceable grille connection flange; a washable body connected to the replaceable grille connection flange; an automatic discharge valve installed at the lower part of the washable body; and a density meter transition flange connected to the washable body.

[0007] Furthermore, in a preferred embodiment of the utility model, it also includes an upper threaded port installed on the upper part of the washable body and connected to an automatic flushing valve.

[0008] Furthermore, in a preferred embodiment of the present invention, the transition flange of the densitometer is connected to the universal flange of the washable body by countersunk bolts.

[0009] Furthermore, in a preferred embodiment of the present invention, it further comprises: a density meter detection flange connected to the density meter transition flange to achieve density measurement of the inlet and outlet slurry.

[0010] Furthermore, in a preferred embodiment of the present invention, the main pipe connecting section is horizontally installed on the inlet and outlet slurry pipes of the mud and water circulation.

[0011] Furthermore, in a preferred embodiment of the present invention, the automatic drain valve is installed and connected specifically via a washable body flange installed at the lower part of the washable body.

[0012] Furthermore, in a preferred embodiment of the present invention, the automatic discharge valve, the automatic flushing valve and the density meter are opened synchronously.

[0013] Furthermore, in a preferred embodiment of the present invention, the replaceable grille installed on the inner side of the replaceable grille connecting flange is specifically a circular grille to match different texture conditions.

[0014] Furthermore, in a preferred embodiment of the present invention, the replaceable grille connecting flange is specifically connected to a flange on a side of the washable body close to the dedicated valve.

[0015] In addition, the utility model also provides a shield machine mud and water circulation system, including the shield machine mud and water circulation density meter installation structure as described above, which also has the above-mentioned technical effects.

[0016] Compared with the prior art, the utility model provides a technical solution for a shield machine mud and water circulation density meter installation structure, comprising: a main pipe connecting section connected to the inlet and outlet slurry pipes of the mud and water circulation; a special valve connected to the main pipe connecting section; a replaceable grille connecting flange connected to the special valve; a replaceable grille installed on the inner side of the replaceable grille connecting flange; a washable body connected to the replaceable grille connecting flange; an automatic discharge valve installed at the bottom of the washable body; a density meter transition flange connected to the washable body. The technical solution provided by the utility model connects the automatic discharge valve to the flange at the bottom of the washable body to achieve internal flushing of the washable body. , to a certain extent, the detection accuracy of the density meter is improved; in addition, the density meter transition flange is connected to the universal flange on the right side of the washable body with countersunk type bolts, and the interchangeability of the 2-inch or 3-inch flange of the differential pressure density meter is achieved by replacing the density meter transition flange; the density meter detection flange is connected through the density meter transition flange to achieve the density measurement of the slurry inlet and outlet. In summary, the technical scheme of the utility model can realize the universality of the installation structure of the density meter for shield mud and water circulation, while ensuring the reliability of use, reducing the cost of use to a great extent, and increasing the reliability of mud and water shield construction. Compared with the prior art, it has significant technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A system function diagram of a shield machine mud water circulation density meter installation structure provided by an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of a replaceable grille provided in an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of an interchangeable flange for a differential pressure density meter 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 Figures 1 to 3 As shown, the installation structure of a density meter for mud and water circulation of a shield machine provided in an embodiment of the present application includes: a main pipe connecting section 1 connected to the inlet and outlet slurry pipes of the mud and water circulation; a special valve 2 connected to the main pipe connecting section 1; a replaceable grille connecting flange 3 connected to the special valve 2; a replaceable grille installed on the inner side of the replaceable grille connecting flange 3; a washable body 4 connected to the replaceable grille connecting flange 3; an automatic discharge valve 6 installed at the lower part of the washable body 4; and a density meter transition flange 7 connected to the washable body 4.

[0027] Compared with the prior art, the utility model provides a technical solution for the installation structure of a density meter for mud and water circulation of a shield machine, comprising a main pipe connecting section 1 connected to the inlet and outlet slurry pipes of the mud and water circulation; a special valve 2 connected to the main pipe connecting section 1; a replaceable grille connecting flange 3 connected to the special valve 2; a replaceable grille installed on the inner side of the replaceable grille connecting flange 3; a washable body 4 connected to the replaceable grille connecting flange 3; an automatic discharge valve 6 installed at the lower part of the washable body 4; and a density meter transition flange 7 connected to the washable body 4. The technical solution provided by the utility model is that the automatic discharge valve 5 is flange-connected to the lower part of the washable body 4 to realize the washable body. Internal flushing improves the detection accuracy of the density meter to a certain extent; in addition, the density meter transition flange 7 is connected to the universal flange on the right side of the washable body 4 using countersunk type bolts, and the interchangeability of the 2-inch or 3-inch flange of the differential pressure density meter is achieved by replacing the density meter transition flange 7; the density meter detection flange 9 is connected to the density meter transition flange 7 to achieve the density measurement of the slurry inlet and outlet. In summary, the technical solution of the utility model can achieve the universality of the installation structure of the density meter for shield mud and water circulation, while ensuring the reliability of use, greatly reducing the cost of use, and increasing the reliability of mud and water shield construction. Compared with the prior art, it has significant technical effects.

[0028] Specifically, in the specific embodiment of the utility model, it also includes an upper threaded port installed on the upper part of the washable body 4 and connected to an automatic flushing valve 8.

[0029] Specifically, in the specific embodiment of the present utility model, the transition flange 7 of the densitometer is connected to the universal flange of the washable body 4 by countersunk bolts.

[0030] Specifically, in a specific embodiment of the utility model, it also includes: a density meter detection flange 9 connected to the density meter transition flange 7 to achieve density measurement of the incoming and outgoing slurry.

[0031] Specifically, in a specific embodiment of the present utility model, the main pipe connecting section 1 is horizontally installed on the inlet and outlet slurry pipes of the mud and water circulation.

[0032] Specifically, in a specific embodiment of the present utility model, the automatic discharge valve 6 is installed and connected via a washable body flange 5 installed at the lower part of the washable body 4 .

[0033] Specifically, in a specific embodiment of the present utility model, the automatic discharge valve 6 and the automatic flushing valve 8 are opened synchronously with the detection of the density meter.

[0034] Specifically, in the specific embodiment of the present utility model, the replaceable grille installed on the inner side of the replaceable grille connecting flange 3 is specifically a circular grille to match different texture conditions.

[0035] Specifically, in a specific embodiment of the present utility model, the replaceable grille connecting flange 3 is specifically connected to the flange of the washable body 4 on one side close to the dedicated valve 2 .

[0036] In addition, an embodiment of the utility model also provides a shield machine mud water circulation system, including the shield machine mud water circulation density meter installation structure as described above, which also has the above-mentioned technical effects.

[0037] To elaborate more specifically, 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. The slurry shield machine is one of the most important systems for slag transportation. During normal excavation, the amount of slurry entering and exiting and the amount of excavated soil are generally monitored to ensure that the excavation and transportation are at a normal level. Among them, the more important parameter is the measurement of slag specific gravity, that is, the densitometer. By measuring the density of the incoming slurry and the density of the outgoing slurry, the density of the incoming and outgoing slurry is measured and calculated to indirectly determine whether there is over-excavation or stagnation; if over-excavation or stagnation occurs, it will cause the stability of the excavation surface stratum, and then affect the major risks such as ground settlement or building damage.

[0038] At present, the density meters used in the mud circulation system of the slurry balance shield machine are generally divided into gamma-ray density meters or differential pressure density meters, both of which are high-cost products; considering the radioactive hazards of gamma-ray density meters, the approval process is relatively difficult and cumbersome, so there are more cases of using differential pressure density meters, generally with 2-inch or 3-inch flange installation; the shield excavation strata contain more or less hard rocks or boulders, and the slurry discharged from the mud-water circulation contains hard rock blocks of irregular particle sizes. At present, the installation type of differential pressure density meters is relatively simple, and the mud particles are not well processed and flushed during use, so that the measuring part of the density meter is often damaged and the measurement data is missing, which has corresponding construction risks to a certain extent; in actual use, they are often replaced, resulting in certain equipment component usage costs.

[0039] The installation structure of the density meter for the mud and water circulation of the shield machine provided by the embodiment of the utility model comprises: a main pipe connection section 1, a special valve 2, a replaceable grille connection flange 3, a washable body 4, a washable body bottom flange 5, an automatic discharge valve 6, a density meter transition flange 7, an automatic flushing valve 8, a density meter detection flange 9, and a density meter processor. In this scheme, the A end of the main pipe connection section 1 is welded to the vertical section of the inlet and outlet slurry pipe of the mud and water circulation to achieve the measurement of the mud density in the inlet and outlet slurry pipe, and the main pipe connection section 1 is required to be installed horizontally; the special valve 2 is connected to the fixed special valve 2 through the universal flange on the main pipe connection section 1, and the replaceable grille connection flange 3 is connected to the other side of the fixed special valve 2, and the replaceable grille is installed in the replaceable grille connection flange 3, as shown in the attached drawings for details. Figure 2As shown, the grid can be matched according to different geological conditions through particle size; the built-in grid is fixed together by connecting the replaceable grid connection flange 3 on the left flange of the washable body 4. The upper threaded port is connected to the automatic flushing valve 8, and the lower flange of the washable body 4 is connected to the automatic discharge valve 6 to achieve internal flushing of the flushable body, to a certain extent, ensure the density meter measurement part, that is, the density meter detection flange 9 and improve the detection accuracy of the density meter; the density meter transition flange 7 is connected to the universal flange on the right side of the washable body 4 with countersunk bolts, and the interchangeability of the 2-inch or 3-inch flange of the differential pressure density meter is achieved by replacing the density meter transition flange 7. See the attached for details. Figure 3 As shown; the density meter detection flange 9 is connected through the density meter transition flange 7 to achieve the density measurement of the slurry inlet and outlet.

[0040] To sum up, the technical scheme involved in the embodiment of the utility model is that the filter grid is replaceable, so that it can be changed when excavating in different strata, thereby improving the adaptability of the filtering effect; a front valve type is adopted to provide conditions for the rapid replacement of components such as grids or densitometers; an active water flushing method is adopted to improve the density detection effect; the replacement of the transition flange can improve the adaptability of the 2-inch or 3-inch flange of the differential pressure densitometer; through the combination of the above methods, the universality of the installation structure of the densitometer for shield mud water circulation is achieved, while ensuring the reliability of use, greatly reducing the cost of use, and increasing the reliability of mud water shield construction. Compared with the prior art, it has significant technical effects.

[0041] 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 shield machine mud water circulation density meter installation structure, characterized in that: include: A main pipe connection section (1) connected to the inlet and outlet slurry pipes of the mud and water circulation; A special valve (2) connected to the main pipe connecting section (1); A replaceable grille connecting flange (3) connected to the special valve (2); A replaceable grille installed inside the replaceable grille connecting flange (3); A washable body (4) connected to the replaceable grille connecting flange (3); An automatic drain valve (6) mounted on the lower part of the washable body (4); A densitometer transition flange (7) connected to the washable body (4).

2. The shield machine mud water circulation density meter installation structure according to claim 1 is characterized in that: Also includes: The upper threaded port installed on the upper part of the washable body (4) is connected to an automatic flushing valve (8).

3. The shield machine mud water circulation density meter installation structure according to claim 2 is characterized in that: The density meter transition flange (7) is specifically connected to the universal flange of the washable body (4) by using countersunk bolts.

4. The shield machine mud water circulation density meter installation structure according to claim 3 is characterized in that: Also includes: A density meter detection flange (9) connected to the density meter transition flange (7) is used to measure the density of the incoming and outgoing slurry.

5. The shield machine mud water circulation density meter installation structure according to claim 4 is characterized in that: The main pipe connecting section (1) is horizontally installed on the inlet and outlet slurry pipes of the mud and water circulation.

6. The shield machine mud water circulation density meter installation structure according to claim 4, characterized in that: The automatic discharge valve (6) is specifically installed and connected via a washable body flange (5) installed at the lower part of the washable body (4).

7. The shield machine mud water circulation density meter installation structure according to claim 6 is characterized in that: The automatic discharge valve (6) and the automatic flushing valve (8) are opened synchronously with the detection of the density meter.

8. The shield machine mud water circulation density meter installation structure according to claim 7, characterized in that: The replaceable grille installed on the inner side of the replaceable grille connecting flange (3) is specifically a circular grille.

9. The shield machine mud water circulation density meter installation structure according to claim 7, characterized in that: The replaceable grille connecting flange (3) is specifically connected to a flange on a side of the washable body (4) close to the dedicated valve (2).

10. A shield machine mud water circulation system, characterized in that: It comprises the installation structure of a density meter for mud-water circulation of a shield machine as described in any one of claims 1 to 9.

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