Shield tail grease pressure detection device for shield tunneling machine

Abstract

The utility model discloses a shield tail grease pressure detection device for a shield tunneling machine, which comprises a shield shell and a tunnel segment, a plurality of shield tail brushes are arranged in a gap between the shield shell and the tunnel segment, and a grease cavity is defined by two adjacent shield tail brushes, the shield shell and the tunnel segment. A plurality of first grease pressure sensors connected with the first data collector are arranged on the shield tail brush and the shield shell in the grease cavity respectively, and a plurality of second grease pressure sensors connected with the second data collector are arranged on the peripheral face of the tunnel segment in the axial direction. And part of the second grease pressure sensor on the peripheral surface of the tunnel segment is located in one grease cavity at the moment when the shield shell moves relative to the tunnel segment. In the shield construction process, the grease average pressure in the corresponding grease cavity at each specific test moment can be accurately detected, so that the change rule of the grease average pressure in the corresponding grease cavity can be accurately analyzed, and the grease injection pressure recommended value can be accurately controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield machines, and in particular relates to a shield tail grease pressure detection device for a shield machine. Background Art

[0002] The shield method is one of the important methods for subway and tunnel construction. During the advancement of the shield machine, the sealing and waterproof performance of the shield tail part directly affects the safety of the shield construction process. The current shield tail sealing and waterproofing system is mainly composed of a shield tail brush and grease filled in the grease cavity between the shield tail brushes. The grease in the grease cavity maintains pressure balance with the water and soil at the shield tail to achieve sealing and waterproofing.

[0003] However, currently most of the grease pressure sensors for detecting the grease pressure in the grease cavity are arranged at the grease injection port. There is a difference between the detected grease pressure and the grease pressure in the grease cavity during the actual construction process, and thus the recommended value of the grease injection pressure of the grease injection pump cannot be accurately controlled. Currently, the recommended value of the grease injection pressure of the grease injection pump is determined mainly based on past experience and engineering examples to achieve a sealing and waterproof effect. Therefore, the grease pressure in the grease cavity may not meet safety requirements. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the utility model provides a shield tail grease pressure detection device for a shield machine, which can accurately detect the average grease pressure in the corresponding grease cavity at each specific test moment during the shield construction process, so as to accurately analyze the change law of the average grease pressure in the corresponding grease cavity, thereby facilitating accurate control of the recommended value of the grease injection pressure.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A shield tail grease pressure detection device for a shield machine comprises a shield shell and a tunnel segment in the shield shell, a plurality of shield tail brushes fixedly connected to the shield shell are arranged in the gap between the shield shell and the tunnel segment, a grease cavity is formed between two adjacent shield tail brushes, the shield shell and the tunnel segment, a plurality of first grease pressure sensors connected to a first data collector are respectively arranged on the shield tail brush and the shield shell in the grease cavity, the first data collector is located outside the shield shell and fixedly connected to the shield shell, a plurality of second grease pressure sensors connected to a second data collector are axially arranged on the outer peripheral surface of the tunnel segment, the second data collector is located inside the tunnel segment and fixedly connected to the tunnel segment, a portion of the second grease pressure sensors on the outer peripheral surface of the tunnel segment is located in one of the grease cavities at one moment when the shield shell moves relative to the tunnel segment, and the first data collector and the second data collector are both connected to a grease pressure data processor.

[0007] Furthermore, a mounting groove matching the structural dimensions of the corresponding second grease pressure sensor is provided on the outer peripheral surface of the tunnel segment at the position of each second grease pressure sensor, and each second grease pressure sensor is arranged in the corresponding mounting groove.

[0008] Furthermore, the outer side of the shield tail brush is covered with a first protective plate near one end fixedly connected to the shield shell, and the outer side of the rest of the shield tail brush is covered with a second protective plate. The multiple first grease pressure sensors arranged on the shield tail brush in the grease cavity are specifically distributed on the second protective plate outside the shield tail brush. The first grease pressure sensor is connected to the first data collector via a first data acquisition line exposed in the grease cavity and passing through the first protective plate.

[0009] Furthermore, the first data acquisition line is covered with a first protective sleeve on its outer side.

[0010] Furthermore, the gap between the first protection plate and the corresponding shield tail brush is filled with sealing grease.

[0011] Furthermore, the second grease pressure sensor is connected to the second data collector via a second data acquisition line extending to the inner side of the tunnel segment.

[0012] Furthermore, the outer side of the second data acquisition line is covered with a second protective sleeve.

[0013] Furthermore, the first grease pressure sensors arranged in the grease cavity are divided into two groups, a plurality of the first grease pressure sensors in the first group are evenly distributed on one of the shield tail brushes in the grease cavity, and a plurality of the first grease pressure sensors in the second group are evenly distributed on the shield shell in the grease cavity, and the number of the second grease pressure sensors in one of the grease cavities at one moment when the shield shell moves relative to the tunnel segment is equal to the number of the first grease pressure sensors in one group in the corresponding grease cavity.

[0014] Furthermore, the grease pressure data processor is a PLC controller, and the first data collector and the second data collector are both wirelessly connected to the grease pressure data processor.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model discloses a shield tail grease pressure detection device for a shield machine, comprising a shield shell and a tunnel segment in the shield shell, a plurality of shield tail brushes fixedly connected to the shield shell are arranged at the gap between the shield shell and the tunnel segment, a grease cavity is formed between two adjacent shield tail brushes, the shield shell and the tunnel segment, a plurality of first grease pressure sensors connected to a first data collector are respectively arranged on the shield tail brush and the shield shell in the grease cavity, the first data collector is located outside the shield shell and fixedly connected to the shield shell, a plurality of second grease pressure sensors connected to a second data collector are axially arranged on the outer peripheral surface of the tunnel segment, the second data collector is located inside the tunnel segment and fixedly connected to the tunnel segment, a portion of the second grease pressure sensors on the outer peripheral surface of the tunnel segment at one moment when the shield shell moves relative to the tunnel segment is located in one of the grease cavities, and the first data collector and the second data collector are both connected to a grease pressure data processor; in this way, during the movement of the shield shell relative to the tunnel segment, the grease pressure at the corresponding position in the grease cavity is sensed in real time by the first grease pressure sensors in the corresponding grease cavity and transmitted to the first data collector, and ... by the second grease pressure sensors in the corresponding grease cavity and transmitted to the first data collector, and the grease pressure at the corresponding position in the grease cavity is sensed by the first grease pressure sensors in the corresponding grease cavity and transmitted to the first data collector, and the grease pressure at the corresponding position in the grease cavity is sensed by the first grease pressure sensors in the corresponding grease cavity and transmitted to the first data collector, and the grease pressure at the corresponding position in the grease cavity is sensed by the first grease pressure sensors The device senses the grease pressure at the corresponding position on the tunnel segment in real time and transmits it to the second data collector, while the first data collector and the second data collector transmit the received grease pressure signals to the grease pressure data processor in real time, and according to the speed and time of the shield shell moving relative to the tunnel segment, as well as the setting position of each second grease pressure sensor on the tunnel segment and the setting position of each shield tail brush on the shield shell, obtains each specific test time when some second grease pressure sensors on the tunnel segment are in the corresponding grease cavity, and the grease pressure data processor processes each grease pressure signal received at each specific test time to obtain the average grease pressure in the corresponding grease cavity at each specific test time, so as to accurately control the grease injection pressure recommended value of the grease injection pump used for injecting shield tail grease into the corresponding grease cavity. Therefore, the shield tail grease pressure detection device for shield machine in the utility model is used in the shield construction process, which can accurately detect the average grease pressure in the corresponding grease cavity at each specific test time, so as to accurately analyze the change law of the average grease pressure in the corresponding grease cavity, thereby facilitating accurate control of the recommended grease injection pressure value.

[0017] In the utility model, mounting grooves matching the structural dimensions of the corresponding second grease pressure sensors are provided on the outer circumferential surface of the tunnel segment at the positions of the second grease pressure sensors, and the second grease pressure sensors are arranged in the corresponding mounting grooves; thus, during the movement of the shield shell relative to the tunnel segment, the shield tail brushes will move with the shield shell relative to the tunnel segment, and the second grease pressure sensors are fixed on the tunnel segment, so that the shield tail brushes will move relative to the second grease pressure sensors, and since the second grease pressure sensors are arranged in the corresponding mounting grooves on the outer circumferential surface of the tunnel segment, during the movement of the shield tail brushes relative to the second grease pressure sensors, the shield tail brushes will not scrape the second grease pressure sensors, so as to prevent damage to the second grease pressure sensors.

[0018] In the utility model, a first protective plate is coated on the outer side of one end of the shield tail brush close to the fixed connection with the shield shell, and a second protective plate is coated on the outer side of the rest of the shield tail brush. A plurality of first grease pressure sensors arranged on the shield tail brush in the grease cavity are specifically distributed on the second protective plate outside the shield tail brush. The first grease pressure sensor is connected to the first data collector via a first data acquisition line exposed in the grease cavity and passing through the first protective plate. Since the first data acquisition line exposed in the grease cavity needs to pass through the shield tail brush and be connected to the first data collector arranged outside the shield shell, the arrangement of the first protective plate can prevent the first data acquisition line from directly passing through the shield tail brush and affecting the sealing of the grease cavity.

[0019] In the utility model, the first data acquisition line is covered with a first protective sleeve on the outside; since the first data acquisition line is directly exposed in the grease cavity, the first protective sleeve can be arranged to prevent the first data acquisition line from directly contacting the shield tail grease in the grease cavity and affecting the data transmission effect of the first data acquisition line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the shield tail grease pressure detection device used for the shield machine in the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the first protective plate;

[0022] Figure 3 for Figure 1 Schematic diagram of the partial enlarged structure of the middle shield tail brush.

[0023] Explanation of the reference numerals in the figure: 1. shield shell, 2. tunnel segment, 3. shield tail brush, 4. grease chamber, 5. first data collector, 6. first grease pressure sensor, 7. second data collector, 8. second grease pressure sensor, 9. first protective plate, 10. second protective plate, 11. first data acquisition line, 12. first protective sleeve, 13. second data acquisition line. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "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, 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 cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an indirect connection 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 according to specific circumstances.

[0027] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0028] like Figure 1As shown, a shield tail grease pressure detection device for a shield machine comprises a shield shell 1 and a tunnel segment 2 in the shield shell 1, a plurality of shield tail brushes 3 fixedly connected to the shield shell 1 are arranged in the gap between the shield shell 1 and the tunnel segment 2, a grease cavity 4 is formed between two adjacent shield tail brushes 3 and the shield shell 1 and the tunnel segment 2, a plurality of first grease pressure sensors 6 connected to a first data collector 5 are respectively arranged on the shield tail brush 3 and the shield shell 1 in the grease cavity 4, the first data collector 5 is located outside the shield shell 1 and fixedly connected to the shield shell 1, a plurality of second grease pressure sensors 8 connected to a second data collector 7 are axially arranged on the outer peripheral surface of the tunnel segment 2, the second data collector 7 is located inside the tunnel segment 2 and fixedly connected to the tunnel segment 2, a portion of the second grease pressure sensors 8 on the outer peripheral surface of the tunnel segment 2 is located in one of the grease cavities 4 at one moment when the shield shell 1 moves relative to the tunnel segment 2, and the first data collector 5 and the second data collector 7 are both connected to a grease pressure data processor.

[0029] In this way, during the movement of the shield shell 1 relative to the tunnel segment 2, the grease pressure at the corresponding position in the grease cavity 4 is sensed in real time by each first grease pressure sensor 6 in the corresponding grease cavity 4 and transmitted to the first data collector 5, and the grease pressure at the corresponding position on the tunnel segment 2 is sensed in real time by each second grease pressure sensor 8 and transmitted to the second data collector 7, and the first data collector 5 and the second data collector 7 transmit the received grease pressure signals to the grease pressure data processor in real time, and obtain the tunnel segment 2 according to the speed and time of the shield shell 1 moving relative to the tunnel segment 2, and the setting position of each second grease pressure sensor 8 on the tunnel segment 2 and the setting position of each shield tail brush 3 on the shield shell 1. At each specific test moment, some of the second grease pressure sensors 8 on the sheet 2 are in the corresponding grease chamber 4. The grease pressure data processor processes the grease pressure signals received at each specific test moment to obtain the average grease pressure in the corresponding grease chamber 4 at each specific test moment, so as to accurately control the recommended grease injection pressure of the grease injection pump used to inject shield tail grease into the corresponding grease chamber 4. Therefore, the shield tail grease pressure detection device for the shield machine in the utility model is used during the shield construction process to accurately detect the average grease pressure in the corresponding grease chamber 4 at each specific test moment, so as to accurately analyze the change law of the average grease pressure in the corresponding grease chamber 4, thereby facilitating the accurate control of the recommended grease injection pressure.

[0030] Among them, Figure 1As shown, a mounting groove matching the structural dimensions of the corresponding second grease pressure sensor 8 is provided at the position of each second grease pressure sensor 8 on the outer peripheral surface of the tunnel segment 2, and each second grease pressure sensor 8 is arranged in the corresponding mounting groove. In this way, when the shield shell 1 moves relative to the tunnel segment 2, each shield tail brush 3 will move relative to the tunnel segment 2 along with the shield shell 1, and each second grease pressure sensor 8 is fixed on the tunnel segment 2, so that each shield tail brush 3 will move relative to each second grease pressure sensor 8, and because each second grease pressure sensor 8 is arranged in the corresponding mounting groove on the outer peripheral surface of the tunnel segment 2, in this way, when each shield tail brush 3 moves relative to each second grease pressure sensor 8, the shield tail brush 3 will not scrape the second grease pressure sensor 8, so as to prevent damage to the second grease pressure sensor 8.

[0031] In one embodiment, the outer side of the shield tail brush 3 is covered with a first protective plate 9 near the end fixedly connected to the shield shell 1, and the outer side of the remaining position of the shield tail brush 3 is covered with a second protective plate 10. The multiple first grease pressure sensors 6 arranged on the shield tail brush 3 in the grease cavity 4 are specifically distributed on the second protective plate 10 outside the shield tail brush 3. The first grease pressure sensor 6 is connected to the first data collector 5 through a first data acquisition line 11 exposed in the grease cavity 4 and passing through the first protective plate 9. Figure 1 and Figure 3 Since the first data acquisition line 11 exposed in the grease chamber 4 needs to pass through the shield tail brush 3 and be connected to the first data acquisition device 5 disposed outside the shield shell 1, the first protective plate 9 can prevent the first data acquisition line 11 from directly passing through the shield tail brush 3 and affecting the sealing of the grease chamber 4.

[0032] The first data acquisition line 11 is covered with a first protective sleeve 12, and the first protective sleeve 12 passes through the hole reserved in the first protective plate 9. Figure 2 Since the first data acquisition line 11 is directly exposed in the grease chamber 4 , the first protective sleeve 12 can prevent the first data acquisition line 11 from directly contacting the shield tail grease in the grease chamber 4 and affecting the data transmission effect of the first data acquisition line 11 .

[0033] The gap between the first protection plate 9 and the corresponding shield tail brush 3 is filled with sealing grease. In this way, the setting of the sealing grease can further prevent the first data acquisition line 11 from directly passing through the shield tail brush 3 and affecting the sealing of the grease chamber 4, and can further improve the sealing of the grease chamber 4.

[0034] In one embodiment, the second grease pressure sensor 8 is connected to the second data acquisition device 7 via a second data acquisition line 13 extending to the inner side of the tunnel segment 2. Figure 1Preferably, the second data acquisition line 13 is coated with a second protective sleeve on the outside. Thus, the second protective sleeve can be provided to prevent the shield process from affecting the data transmission effect of the second data acquisition line 13.

[0035] In one embodiment, the first grease pressure sensors 6 provided in the grease cavity 4 are divided into two groups, and the multiple first grease pressure sensors 6 in the first group are evenly distributed on one of the shield tail brushes 3 in the grease cavity 4, and the multiple first grease pressure sensors 6 in the second group are evenly distributed on the shield shell 1 in the grease cavity 4. The number of the second grease pressure sensors 8 in one of the grease cavities 4 at one moment when the shield shell 1 moves relative to the tunnel segment 2 is equal to the number of the first grease pressure sensors 6 in one group in the corresponding grease cavity 4. In this way, the average grease pressure in the corresponding grease cavity 4 can be detected more accurately through each first grease pressure sensor 6 and each second grease pressure sensor 8 in the corresponding grease cavity 4.

[0036] In one embodiment, the grease pressure data processor is a PLC controller, and the first data collector 5 and the second data collector 7 are both wirelessly connected to the grease pressure data processor. The grease pressure data processor, i.e., the PLC controller, processes each grease pressure signal received at each specific test moment, specifically, sums up each grease pressure received at the corresponding specific test moment and calculates the average value to obtain the average grease pressure in the corresponding grease chamber 4 at the corresponding specific test moment.

[0037] In summary, through the shield tail grease pressure detection device for shield machine in the utility model, the average grease pressure in the corresponding grease chamber 4 at each specific test moment can be accurately detected during the shield construction process, so as to accurately analyze the change law of the average grease pressure in the corresponding grease chamber 4, and then facilitate accurate control of the recommended value of the grease injection pressure, so as to adapt to the safety requirements in the actual shield construction process.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A shield tail grease pressure detection device for a shield machine, characterized in that: The invention comprises a shield shell (1) and a tunnel segment (2) located in the shield shell (1); a plurality of shield tail brushes (3) fixedly connected to the shield shell (1) are arranged in the gap between the shield shell (1) and the tunnel segment (2); a grease cavity (4) is formed between two adjacent shield tail brushes (3) and the shield shell (1) and the tunnel segment (2); a plurality of first grease pressure sensors (6) connected to a first data collector (5) are respectively arranged on the shield tail brush (3) and the shield shell (1) in the grease cavity (4); the first data collector (5) is located outside the shield shell (1) and connected to the shield shell (1). ), a plurality of second grease pressure sensors (8) connected to a second data collector (7) are axially arranged on the outer peripheral surface of the tunnel segment (2), the second data collector (7) is located inside the tunnel segment (2) and is fixedly connected to the tunnel segment (2), a portion of the second grease pressure sensors (8) on the outer peripheral surface of the tunnel segment (2) is located in one of the grease chambers (4) at a moment when the shield shell (1) moves relative to the tunnel segment (2), and the first data collector (5) and the second data collector (7) are both connected to a grease pressure data processor.

2. The shield tail grease pressure detection device for a shield machine according to claim 1, characterized in that: A mounting groove matching the structural dimensions of the corresponding second grease pressure sensor (8) is provided on the outer peripheral surface of the tunnel segment (2) at the position of each second grease pressure sensor (8), and each second grease pressure sensor (8) is arranged in the corresponding mounting groove.

3. The shield tail grease pressure detection device for a shield machine according to claim 2, characterized in that: The shield tail brush (3) is coated with a first protective plate (9) on the outer side of one end close to the shield shell (1), and the rest of the shield tail brush (3) is coated with a second protective plate (10) on the outer side. The plurality of first grease pressure sensors (6) arranged on the shield tail brush (3) in the grease cavity (4) are specifically distributed on the second protective plate (10) on the outer side of the shield tail brush (3). The first grease pressure sensors (6) are connected to the first data acquisition device (5) via a first data acquisition line (11) exposed in the grease cavity (4) and passing through the first protective plate (9).

4. The shield tail grease pressure detection device for a shield machine according to claim 3 is characterized in that: The first data acquisition line (11) is coated with a first protective sleeve (12) on the outside.

5. The shield tail grease pressure detection device for a shield machine according to claim 3, characterized in that: The gap between the first protection plate (9) and the corresponding shield tail brush (3) is filled with sealing grease.

6. The shield tail grease pressure detection device for a shield machine according to claim 2, characterized in that: The second grease pressure sensor (8) is connected to the second data collector (7) via a second data acquisition line (13) extending to the inside of the tunnel segment (2).

7. The shield tail grease pressure detection device for a shield machine according to claim 6, characterized in that: The second data acquisition line (13) is coated with a second protective sleeve on the outside.

8. The shield tail grease pressure detection device for a shield machine according to claim 2, characterized in that: The first grease pressure sensors (6) arranged in the grease cavity (4) are divided into two groups. A plurality of the first grease pressure sensors (6) in the first group are evenly distributed on one of the shield tail brushes (3) in the grease cavity (4). A plurality of the first grease pressure sensors (6) in the second group are evenly distributed on the shield shell (1) in the grease cavity (4). The number of the second grease pressure sensors (8) in one of the grease cavities (4) at a moment when the shield shell (1) moves relative to the tunnel segment (2) is equal to the number of the first grease pressure sensors (6) in one group in the corresponding grease cavity (4).

9. The shield tail grease pressure detection device for a shield machine according to claim 2, characterized in that: The grease pressure data processor is a PLC controller, and the first data collector (5) and the second data collector (7) are both wirelessly connected to the grease pressure data processor.

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